3007 lines
108 KiB
C++
3007 lines
108 KiB
C++
// Copyright 2018 Google LLC. All Rights Reserved. This file and proprietary
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// source code may only be used and distributed under the Widevine Master
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// License Agreement.
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//
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// Crypto - wrapper classes for OEMCrypto interface
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//
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#include "crypto_session.h"
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#include <string.h>
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#include <algorithm>
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#include <iostream>
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#include <memory>
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#include "advance_iv_ctr.h"
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#include "arraysize.h"
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#include "content_key_session.h"
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#include "crypto_key.h"
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#include "entitlement_key_session.h"
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#include "log.h"
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#include "platform.h"
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#include "privacy_crypto.h"
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#include "properties.h"
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#include "pst_report.h"
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#include "string_conversions.h"
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#include "usage_table_header.h"
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#include "wv_cdm_constants.h"
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// Stringify turns macro arguments into static C strings.
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// Example: STRINGIFY(this_argument) -> "this_argument"
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#define STRINGIFY(PARAM...) #PARAM
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#define RETURN_IF_NULL(PARAM, ret_value) \
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if ((PARAM) == nullptr) { \
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LOGE("Output parameter |" STRINGIFY(PARAM) "| not provided"); \
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return ret_value; \
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}
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#define RETURN_IF_UNINITIALIZED(ret_value) \
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if (!IsInitialized()) { \
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LOGE("Crypto session is not initialized"); \
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return ret_value; \
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}
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#define RETURN_IF_NOT_OPEN(ret_value) \
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if (!open_) { \
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LOGE("Crypto session is not open"); \
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return ret_value; \
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}
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namespace wvcdm {
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namespace {
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constexpr size_t KiB = 1024;
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constexpr size_t MiB = 1024 * 1024;
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constexpr uint32_t kRsaSignatureLength = 256;
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constexpr size_t kEstimatedInitialUsageTableHeader = 40;
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// Constants and utility objects relating to OEM Certificates
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constexpr const char* kWidevineSystemIdExtensionOid = "1.3.6.1.4.1.11129.4.1.1";
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constexpr int kMaxTerminateCountDown = 5;
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const std::string kStringNotAvailable = "NA";
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// Constants relating to OEMCrypto resource rating tiers. These tables are
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// ordered by resource rating tier from lowest to highest. These should be
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// updated whenever the supported range of resource rating tiers changes.
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constexpr size_t kMaxSubsampleRegionSizes[] = {
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100 * KiB, // Tier 1 - Low
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500 * KiB, // Tier 2 - Medium
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1 * MiB, // Tier 3 - High
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4 * MiB, // Tier 4 - Very High
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};
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// The +1 in this calculation is because the bounds RESOURCE_RATING_TIER_MAX and
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// RESOURCE_RATING_TIER_MIN are inclusive.
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static_assert(ArraySize(kMaxSubsampleRegionSizes) ==
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RESOURCE_RATING_TIER_MAX - RESOURCE_RATING_TIER_MIN + 1,
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"The kMaxSubsampleRegionSizes table needs to be updated to "
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"reflect the supported range of resource rating tiers.");
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constexpr size_t kDefaultMaxSubsampleRegionSize = kMaxSubsampleRegionSizes[0];
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// This maps a few common OEMCryptoResult to CdmResponseType. Many mappings
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// are not universal but are OEMCrypto method specific. Those will be
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// specified in the CryptoSession method rather than here.
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CdmResponseType MapOEMCryptoResult(OEMCryptoResult result,
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CdmResponseType default_status,
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const char* crypto_session_method) {
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if (result != OEMCrypto_SUCCESS) {
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LOGE("Mapping OEMCrypto result: crypto_session_method = %s, result = %d",
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crypto_session_method ? crypto_session_method : "N/A",
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static_cast<int>(result));
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}
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switch (result) {
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case OEMCrypto_SUCCESS:
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return NO_ERROR;
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case OEMCrypto_ERROR_NOT_IMPLEMENTED:
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return NOT_IMPLEMENTED_ERROR;
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case OEMCrypto_ERROR_TOO_MANY_SESSIONS:
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return INSUFFICIENT_CRYPTO_RESOURCES;
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case OEMCrypto_ERROR_SESSION_LOST_STATE:
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return SESSION_LOST_STATE_ERROR;
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case OEMCrypto_ERROR_SYSTEM_INVALIDATED:
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return SYSTEM_INVALIDATED_ERROR;
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default:
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return default_status;
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}
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}
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void AdvanceDestBuffer(OEMCrypto_DestBufferDesc* dest_buffer, size_t bytes) {
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switch (dest_buffer->type) {
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case OEMCrypto_BufferType_Clear:
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dest_buffer->buffer.clear.address += bytes;
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dest_buffer->buffer.clear.address_length -= bytes;
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return;
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case OEMCrypto_BufferType_Secure:
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dest_buffer->buffer.secure.offset += bytes;
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return;
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case OEMCrypto_BufferType_Direct:
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// Nothing to do for this buffer type.
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return;
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}
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LOGE("Unrecognized OEMCryptoBufferType %u - doing nothing",
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dest_buffer->type);
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}
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} // namespace
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shared_mutex CryptoSession::static_field_mutex_;
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shared_mutex CryptoSession::oem_crypto_mutex_;
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bool CryptoSession::initialized_ = false;
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int CryptoSession::session_count_ = 0;
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int CryptoSession::termination_counter_ = 0;
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UsageTableHeader* CryptoSession::usage_table_header_l1_ = nullptr;
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UsageTableHeader* CryptoSession::usage_table_header_l3_ = nullptr;
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std::atomic<uint64_t> CryptoSession::request_id_index_source_(0);
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size_t GetOffset(std::string message, std::string field) {
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size_t pos = message.find(field);
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if (pos == std::string::npos) {
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LOGE("Cannot find the |field| offset in message: field = %s",
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field.c_str());
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pos = 0;
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}
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return pos;
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}
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OEMCrypto_Substring GetSubstring(const std::string& message,
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const std::string& field, bool set_zero) {
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OEMCrypto_Substring substring;
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if (set_zero || field.empty() || message.empty()) {
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substring.offset = 0;
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substring.length = 0;
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} else {
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size_t pos = message.find(field);
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if (pos == std::string::npos) {
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LOGW("Cannot find the |field| substring in message: field = %s",
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field.c_str());
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substring.offset = 0;
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substring.length = 0;
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} else {
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substring.offset = pos;
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substring.length = field.length();
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}
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}
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return substring;
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}
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void GenerateMacContext(const std::string& input_context,
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std::string* deriv_context) {
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if (!deriv_context) {
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LOGE("Output parameter |deriv_context| not provided");
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return;
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}
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const std::string kSigningKeyLabel = "AUTHENTICATION";
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const size_t kSigningKeySizeBits = wvcdm::MAC_KEY_SIZE * 8;
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deriv_context->assign(kSigningKeyLabel);
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deriv_context->append(1, '\0');
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deriv_context->append(input_context);
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deriv_context->append(EncodeUint32(kSigningKeySizeBits * 2));
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}
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void GenerateEncryptContext(const std::string& input_context,
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std::string* deriv_context) {
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if (!deriv_context) {
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LOGE("Output parameter |deriv_context| not provided");
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return;
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}
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const std::string kEncryptionKeyLabel = "ENCRYPTION";
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const size_t kEncryptionKeySizeBits = wvcdm::CONTENT_KEY_SIZE * 8;
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deriv_context->assign(kEncryptionKeyLabel);
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deriv_context->append(1, '\0');
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deriv_context->append(input_context);
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deriv_context->append(EncodeUint32(kEncryptionKeySizeBits));
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}
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OEMCryptoCipherMode ToOEMCryptoCipherMode(CdmCipherMode cipher_mode) {
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return cipher_mode == kCipherModeCtr ? OEMCrypto_CipherMode_CTR
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: OEMCrypto_CipherMode_CBC;
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}
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CryptoSession::CryptoSession(metrics::CryptoMetrics* metrics)
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: metrics_(metrics),
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system_id_(-1),
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open_(false),
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pre_provision_token_type_(kClientTokenUninitialized),
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update_usage_table_after_close_session_(false),
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is_destination_buffer_type_valid_(false),
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requested_security_level_(kLevelDefault),
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usage_support_type_(kUnknownUsageSupport),
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usage_table_header_(nullptr),
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api_version_(0),
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max_subsample_region_size_(0) {
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assert(metrics);
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Init();
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life_span_.Start();
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}
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CryptoSession::~CryptoSession() {
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if (open_) {
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Close();
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}
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WithStaticFieldWriteLock("~CryptoSession", [&] {
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if (session_count_ > 0) {
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--session_count_;
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} else {
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LOGE("Invalid crypto session count: session_count_ = %d", session_count_);
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}
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});
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TryTerminate();
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M_RECORD(metrics_, crypto_session_life_span_, life_span_.AsMs());
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}
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CdmResponseType CryptoSession::GetProvisioningMethod(
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SecurityLevel requested_security_level, CdmClientTokenType* token_type) {
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OEMCrypto_ProvisioningMethod method;
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WithOecReadLock("GetProvisioningMethod", [&] {
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method = OEMCrypto_GetProvisioningMethod(requested_security_level);
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});
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metrics_->oemcrypto_provisioning_method_.Record(method);
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CdmClientTokenType type;
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switch (method) {
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case OEMCrypto_OEMCertificate:
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type = kClientTokenOemCert;
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break;
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case OEMCrypto_Keybox:
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type = kClientTokenKeybox;
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break;
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case OEMCrypto_DrmCertificate:
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type = kClientTokenDrmCert;
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break;
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case OEMCrypto_ProvisioningError:
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default:
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LOGE("OEMCrypto_GetProvisioningMethod failed: method = %d",
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static_cast<int>(method));
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metrics_->oemcrypto_provisioning_method_.SetError(method);
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return GET_PROVISIONING_METHOD_ERROR;
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}
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*token_type = type;
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return NO_ERROR;
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}
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void CryptoSession::Init() {
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LOGV("Initializing crypto session");
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bool initialized = false;
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WithStaticFieldWriteLock("Init", [&] {
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session_count_ += 1;
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if (!initialized_) {
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std::string sandbox_id;
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OEMCryptoResult sts;
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WithOecWriteLock("Init", [&] {
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if (Properties::GetSandboxId(&sandbox_id) && !sandbox_id.empty()) {
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sts = OEMCrypto_SetSandbox(
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reinterpret_cast<const uint8_t*>(sandbox_id.c_str()),
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sandbox_id.length());
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metrics_->oemcrypto_set_sandbox_.Record(sandbox_id);
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}
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M_TIME(sts = OEMCrypto_Initialize(), metrics_, oemcrypto_initialize_,
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sts);
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});
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if (OEMCrypto_SUCCESS != sts) {
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LOGE("OEMCrypto_Initialize failed: status = %d", static_cast<int>(sts));
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return;
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}
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termination_counter_ = Properties::delay_oem_crypto_termination()
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? kMaxTerminateCountDown
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: 0;
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initialized_ = true;
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initialized = true;
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}
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});
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if (initialized) {
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uint32_t version;
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std::string api_version =
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CryptoSession::GetApiVersion(kLevelDefault, &version)
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? std::to_string(version)
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: kStringNotAvailable;
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std::string api_minor_version =
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CryptoSession::GetApiMinorVersion(kLevelDefault, &version)
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? std::to_string(version)
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: kStringNotAvailable;
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LOGD("OEMCrypto version (default security level): %s.%s",
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api_version.c_str(), api_minor_version.c_str());
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api_version = CryptoSession::GetApiVersion(kLevel3, &version)
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? std::to_string(version)
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: kStringNotAvailable;
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api_minor_version = CryptoSession::GetApiMinorVersion(kLevel3, &version)
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? std::to_string(version)
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: kStringNotAvailable;
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LOGD("OEMCrypto version (L3 security level): %s.%s", api_version.c_str(),
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api_minor_version.c_str());
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}
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}
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bool CryptoSession::TryTerminate() {
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LOGV("Terminating crypto session");
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WithStaticFieldWriteLock("TryTerminate", [&] {
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LOGV(
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"Terminating crypto session: initialized_ = %s, session_count_ = %d, "
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"termination_counter_ = %d",
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initialized_ ? "true" : "false", session_count_, termination_counter_);
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if (termination_counter_ > 0) {
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--termination_counter_;
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}
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if (session_count_ > 0 || termination_counter_ > 0 || !initialized_)
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return false;
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OEMCryptoResult sts;
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WithOecWriteLock("Terminate", [&] { sts = OEMCrypto_Terminate(); });
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if (OEMCrypto_SUCCESS != sts) {
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LOGE("OEMCrypto_Terminate failed: status = %d", static_cast<int>(sts));
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}
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if (usage_table_header_l1_ != nullptr) {
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delete usage_table_header_l1_;
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usage_table_header_l1_ = nullptr;
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}
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if (usage_table_header_l3_ != nullptr) {
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delete usage_table_header_l3_;
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usage_table_header_l3_ = nullptr;
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}
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initialized_ = false;
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return true;
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});
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return true;
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}
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void CryptoSession::DisableDelayedTermination() {
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LOGV("Disable delayed termination");
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WithStaticFieldWriteLock("DisableDelayedTermination",
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[&] { termination_counter_ = 0; });
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}
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CdmResponseType CryptoSession::GetTokenFromKeybox(std::string* token) {
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RETURN_IF_NULL(token, PARAMETER_NULL);
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std::string temp_buffer(KEYBOX_KEY_DATA_SIZE, '\0');
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size_t buf_size = temp_buffer.size();
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uint8_t* buf = reinterpret_cast<uint8_t*>(&temp_buffer[0]);
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OEMCryptoResult status;
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WithOecReadLock("GetTokenFromKeybox", [&] {
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M_TIME(status =
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OEMCrypto_GetKeyData(buf, &buf_size, requested_security_level_),
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metrics_, oemcrypto_get_key_data_, status,
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metrics::Pow2Bucket(buf_size));
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});
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if (OEMCrypto_SUCCESS == status) {
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token->swap(temp_buffer);
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}
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return MapOEMCryptoResult(status, GET_TOKEN_FROM_KEYBOX_ERROR,
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"GetTokenFromKeybox");
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}
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CdmResponseType CryptoSession::GetTokenFromOemCert(std::string* token) {
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RETURN_IF_NULL(token, PARAMETER_NULL);
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OEMCryptoResult status;
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if (!oem_token_.empty()) {
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token->assign(oem_token_);
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return NO_ERROR;
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}
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std::string temp_buffer(CERTIFICATE_DATA_SIZE, '\0');
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bool retrying = false;
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while (true) {
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size_t buf_size = temp_buffer.size();
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uint8_t* buf = reinterpret_cast<uint8_t*>(&temp_buffer[0]);
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WithOecSessionLock("GetTokenFromOemCert", [&] {
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status = OEMCrypto_GetOEMPublicCertificate(buf, &buf_size,
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requested_security_level_);
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});
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metrics_->oemcrypto_get_oem_public_certificate_.Increment(status);
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if (OEMCrypto_SUCCESS == status) {
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temp_buffer.resize(buf_size);
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oem_token_.assign(temp_buffer);
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token->assign(temp_buffer);
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return NO_ERROR;
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}
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if (status == OEMCrypto_ERROR_SHORT_BUFFER && !retrying) {
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temp_buffer.resize(buf_size);
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retrying = true;
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continue;
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}
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return MapOEMCryptoResult(status, GET_TOKEN_FROM_OEM_CERT_ERROR,
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"GetTokenFromOemCert");
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}
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}
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CdmResponseType CryptoSession::GetProvisioningToken(std::string* token) {
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if (token == nullptr) {
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metrics_->crypto_session_get_token_.Increment(PARAMETER_NULL);
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RETURN_IF_NULL(token, PARAMETER_NULL);
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}
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if (!IsInitialized()) {
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metrics_->crypto_session_get_token_.Increment(
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CRYPTO_SESSION_NOT_INITIALIZED);
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return CRYPTO_SESSION_NOT_INITIALIZED;
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}
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CdmResponseType status = UNKNOWN_CLIENT_TOKEN_TYPE;
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if (pre_provision_token_type_ == kClientTokenKeybox) {
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status = GetTokenFromKeybox(token);
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} else if (pre_provision_token_type_ == kClientTokenOemCert) {
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status = GetTokenFromOemCert(token);
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}
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metrics_->crypto_session_get_token_.Increment(status);
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return status;
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}
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CdmSecurityLevel CryptoSession::GetSecurityLevel() {
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LOGV("Getting security level");
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RETURN_IF_NOT_OPEN(kSecurityLevelUninitialized);
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return GetSecurityLevel(requested_security_level_);
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}
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CdmSecurityLevel CryptoSession::GetSecurityLevel(
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SecurityLevel requested_level) {
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LOGV("Getting security level: requested_level = %d",
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static_cast<int>(requested_level));
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RETURN_IF_UNINITIALIZED(kSecurityLevelUninitialized);
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std::string security_level;
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WithOecReadLock("GetSecurityLevel", [&] {
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security_level = OEMCrypto_SecurityLevel(requested_level);
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});
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if ((security_level.size() != 2) || (security_level.at(0) != 'L')) {
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return kSecurityLevelUnknown;
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}
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CdmSecurityLevel cdm_security_level;
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switch (security_level.at(1)) {
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case '1':
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cdm_security_level = kSecurityLevelL1;
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break;
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case '2':
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cdm_security_level = kSecurityLevelL2;
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break;
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case '3':
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cdm_security_level = kSecurityLevelL3;
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break;
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default:
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cdm_security_level = kSecurityLevelUnknown;
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break;
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}
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return cdm_security_level;
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}
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CdmResponseType CryptoSession::GetInternalDeviceUniqueId(
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std::string* device_id) {
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RETURN_IF_NULL(device_id, PARAMETER_NULL);
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RETURN_IF_UNINITIALIZED(CRYPTO_SESSION_NOT_INITIALIZED);
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std::vector<uint8_t> id;
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size_t id_length = 32;
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id.resize(id_length);
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|
OEMCryptoResult sts;
|
|
WithOecReadLock("GetInternalDeviceUniqueId Attempt 1", [&] {
|
|
sts = OEMCrypto_GetDeviceID(&id[0], &id_length, requested_security_level_);
|
|
});
|
|
// Increment the count of times this method was called.
|
|
metrics_->oemcrypto_get_device_id_.Increment(sts);
|
|
if (sts == OEMCrypto_ERROR_SHORT_BUFFER) {
|
|
id.resize(id_length);
|
|
WithOecReadLock("GetInternalDeviceUniqueId Attempt 2", [&] {
|
|
sts =
|
|
OEMCrypto_GetDeviceID(&id[0], &id_length, requested_security_level_);
|
|
});
|
|
metrics_->oemcrypto_get_device_id_.Increment(sts);
|
|
}
|
|
|
|
if (sts == OEMCrypto_ERROR_NOT_IMPLEMENTED &&
|
|
pre_provision_token_type_ == kClientTokenOemCert) {
|
|
return GetTokenFromOemCert(device_id);
|
|
} else {
|
|
// Either the authentication root is a keybox or the device has transitioned
|
|
// to using OEMCerts.
|
|
// OEMCryptos, like the Level 3, that transition from Provisioning 2.0 to
|
|
// 3.0 would have a new device ID, which would affect SPOID calculation.
|
|
// In order to resolve this, we use OEMCrypto_GetDeviceID if it is
|
|
// implemented, so the OEMCrypto can continue to report the same device ID.
|
|
if (sts == OEMCrypto_SUCCESS) {
|
|
device_id->assign(reinterpret_cast<char*>(&id[0]), id_length);
|
|
}
|
|
|
|
return MapOEMCryptoResult(sts, GET_DEVICE_ID_ERROR,
|
|
"GetInternalDeviceUniqueId");
|
|
}
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GetExternalDeviceUniqueId(
|
|
std::string* device_id) {
|
|
RETURN_IF_NULL(device_id, PARAMETER_NULL);
|
|
|
|
std::string temp;
|
|
CdmResponseType status = GetInternalDeviceUniqueId(&temp);
|
|
|
|
if (status != NO_ERROR) return status;
|
|
|
|
size_t id_length = 0;
|
|
OEMCryptoResult sts;
|
|
WithOecReadLock("GetExternalDeviceUniqueId", [&] {
|
|
sts = OEMCrypto_GetDeviceID(nullptr, &id_length, requested_security_level_);
|
|
});
|
|
metrics_->oemcrypto_get_device_id_.Increment(sts);
|
|
|
|
if (sts == OEMCrypto_ERROR_NOT_IMPLEMENTED &&
|
|
pre_provision_token_type_ == kClientTokenOemCert) {
|
|
// To keep the size of the value passed back to the application down, hash
|
|
// the large OEM Public Cert to a smaller value.
|
|
temp = Sha256Hash(temp);
|
|
}
|
|
|
|
*device_id = temp;
|
|
return NO_ERROR;
|
|
}
|
|
|
|
bool CryptoSession::GetApiVersion(uint32_t* version) {
|
|
LOGV("Getting API version");
|
|
RETURN_IF_NOT_OPEN(false);
|
|
return GetApiVersion(requested_security_level_, version);
|
|
}
|
|
|
|
bool CryptoSession::GetApiVersion(SecurityLevel security_level,
|
|
uint32_t* version) {
|
|
LOGV("Getting API version: security_level = %d",
|
|
static_cast<int>(security_level));
|
|
if (!version) {
|
|
LOGE("Output parameter |version| not provided");
|
|
return false;
|
|
}
|
|
RETURN_IF_UNINITIALIZED(false);
|
|
|
|
WithOecReadLock("GetApiVersion",
|
|
[&] { *version = OEMCrypto_APIVersion(security_level); });
|
|
// Record the version into the metrics.
|
|
metrics_->oemcrypto_api_version_.Record(*version);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CryptoSession::GetApiMinorVersion(SecurityLevel security_level,
|
|
uint32_t* minor_version) {
|
|
LOGV("Getting API minor version: security_level = %d",
|
|
static_cast<int>(security_level));
|
|
if (!minor_version) {
|
|
LOGE("Output parameter |minor_version| not provided");
|
|
return false;
|
|
}
|
|
RETURN_IF_UNINITIALIZED(false);
|
|
|
|
WithOecReadLock("GetApiMinorVersion", [&] {
|
|
*minor_version = OEMCrypto_MinorAPIVersion(security_level);
|
|
});
|
|
// Record the minor version into the metrics.
|
|
metrics_->oemcrypto_minor_api_version_.Record(*minor_version);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CryptoSession::GetSystemId(uint32_t* system_id) {
|
|
RETURN_IF_NULL(system_id, false);
|
|
RETURN_IF_UNINITIALIZED(false);
|
|
RETURN_IF_NOT_OPEN(false);
|
|
*system_id = system_id_;
|
|
return true;
|
|
}
|
|
|
|
// This method gets the system id from the keybox key data.
|
|
// This method assumes that OEMCrypto has been initialized before making this
|
|
// call.
|
|
CdmResponseType CryptoSession::GetSystemIdInternal(uint32_t* system_id) {
|
|
RETURN_IF_NULL(system_id, PARAMETER_NULL);
|
|
|
|
if (pre_provision_token_type_ == kClientTokenKeybox) {
|
|
std::string token;
|
|
CdmResponseType status = GetTokenFromKeybox(&token);
|
|
|
|
if (status != NO_ERROR) return status;
|
|
|
|
if (token.size() < 2 * sizeof(uint32_t)) {
|
|
LOGE("Keybox token size too small: token_size = %zu", token.size());
|
|
return KEYBOX_TOKEN_TOO_SHORT;
|
|
}
|
|
|
|
// Decode 32-bit int encoded as network-byte-order byte array starting at
|
|
// index 4.
|
|
uint32_t* id = reinterpret_cast<uint32_t*>(&token[4]);
|
|
*system_id = ntohl(*id);
|
|
return NO_ERROR;
|
|
|
|
} else if (pre_provision_token_type_ == kClientTokenOemCert) {
|
|
// Get the OEM Cert
|
|
std::string oem_cert;
|
|
CdmResponseType status = GetTokenFromOemCert(&oem_cert);
|
|
|
|
if (status != NO_ERROR) return status;
|
|
|
|
if (!ExtractSystemIdFromOemCert(oem_cert, system_id))
|
|
return EXTRACT_SYSTEM_ID_FROM_OEM_CERT_ERROR;
|
|
|
|
return NO_ERROR;
|
|
|
|
// TODO(blueeyes): Support loading the system id from a pre-provisioned
|
|
// Drm certificate.
|
|
} else if (pre_provision_token_type_ == kClientTokenDrmCert) {
|
|
return NO_ERROR;
|
|
} else {
|
|
LOGE("Unsupported pre-provision token type: %d",
|
|
static_cast<int>(pre_provision_token_type_));
|
|
return UNKNOWN_CLIENT_TOKEN_TYPE;
|
|
}
|
|
}
|
|
|
|
bool CryptoSession::ExtractSystemIdFromOemCert(const std::string& oem_cert,
|
|
uint32_t* system_id) {
|
|
return ExtractExtensionValueFromCertificate(
|
|
oem_cert, kWidevineSystemIdExtensionOid, /* cert_index */ 1, system_id);
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GetProvisioningId(std::string* provisioning_id) {
|
|
RETURN_IF_NULL(provisioning_id, PARAMETER_NULL);
|
|
RETURN_IF_UNINITIALIZED(CRYPTO_SESSION_NOT_INITIALIZED);
|
|
|
|
if (pre_provision_token_type_ == kClientTokenOemCert) {
|
|
// OEM Cert devices have no provisioning-unique ID embedded in them, so we
|
|
// synthesize one by using the External Device-Unique ID and inverting all
|
|
// the bits.
|
|
CdmResponseType status = GetExternalDeviceUniqueId(provisioning_id);
|
|
|
|
if (status != NO_ERROR) return status;
|
|
|
|
for (size_t i = 0; i < provisioning_id->size(); ++i) {
|
|
char value = (*provisioning_id)[i];
|
|
(*provisioning_id)[i] = ~value;
|
|
}
|
|
|
|
return NO_ERROR;
|
|
} else if (pre_provision_token_type_ == kClientTokenKeybox) {
|
|
std::string token;
|
|
CdmResponseType status = GetTokenFromKeybox(&token);
|
|
|
|
if (status != NO_ERROR) return status;
|
|
|
|
if (token.size() < 24) {
|
|
LOGE("Keybox token size too small: %zu", token.size());
|
|
return KEYBOX_TOKEN_TOO_SHORT;
|
|
}
|
|
|
|
provisioning_id->assign(reinterpret_cast<char*>(&token[8]), 16);
|
|
return NO_ERROR;
|
|
} else {
|
|
LOGE("Unsupported pre-provision token type: %d",
|
|
static_cast<int>(pre_provision_token_type_));
|
|
return UNKNOWN_CLIENT_TOKEN_TYPE;
|
|
}
|
|
}
|
|
|
|
uint8_t CryptoSession::GetSecurityPatchLevel() {
|
|
uint8_t patch;
|
|
WithOecReadLock("GetSecurityPatchLevel", [&] {
|
|
patch = OEMCrypto_Security_Patch_Level(requested_security_level_);
|
|
});
|
|
metrics_->oemcrypto_security_patch_level_.Record(patch);
|
|
return patch;
|
|
}
|
|
|
|
CdmResponseType CryptoSession::Open(SecurityLevel requested_security_level) {
|
|
LOGD("Opening crypto session: requested_security_level = %s",
|
|
requested_security_level == kLevel3
|
|
? QUERY_VALUE_SECURITY_LEVEL_L3.c_str()
|
|
: QUERY_VALUE_SECURITY_LEVEL_DEFAULT.c_str());
|
|
RETURN_IF_UNINITIALIZED(UNKNOWN_ERROR);
|
|
if (open_) return NO_ERROR;
|
|
|
|
CdmResponseType result = GetProvisioningMethod(requested_security_level,
|
|
&pre_provision_token_type_);
|
|
if (result != NO_ERROR) return result;
|
|
|
|
OEMCrypto_SESSION sid;
|
|
requested_security_level_ = requested_security_level;
|
|
OEMCryptoResult sts;
|
|
WithOecWriteLock("Open() calling OEMCrypto_OpenSession", [&] {
|
|
sts = OEMCrypto_OpenSession(&sid, requested_security_level);
|
|
});
|
|
|
|
if (sts != OEMCrypto_SUCCESS) {
|
|
WithStaticFieldReadLock(
|
|
"Open() reporting OEMCrypto_OpenSession Failure", [&] {
|
|
LOGE(
|
|
"OEMCrypto_Open failed: status = %d, session_count_ = %d,"
|
|
" initialized_ = %s",
|
|
static_cast<int>(sts), session_count_,
|
|
initialized_ ? "true" : "false");
|
|
});
|
|
return MapOEMCryptoResult(sts, OPEN_CRYPTO_SESSION_ERROR, "Open");
|
|
}
|
|
|
|
WithStaticFieldWriteLock("Open() termination_counter", [&] {
|
|
termination_counter_ =
|
|
Properties::delay_oem_crypto_termination() ? kMaxTerminateCountDown : 0;
|
|
});
|
|
|
|
oec_session_id_ = static_cast<CryptoSessionId>(sid);
|
|
LOGV("Opened session: id = %u", oec_session_id_);
|
|
open_ = true;
|
|
|
|
// Get System ID and save it.
|
|
result = GetSystemIdInternal(&system_id_);
|
|
if (result == NO_ERROR) {
|
|
metrics_->crypto_session_system_id_.Record(system_id_);
|
|
} else {
|
|
LOGE("Failed to fetch system ID");
|
|
metrics_->crypto_session_system_id_.SetError(result);
|
|
return result;
|
|
}
|
|
|
|
// Set up request ID
|
|
uint64_t request_id_base;
|
|
OEMCryptoResult random_sts;
|
|
WithOecReadLock("Open() calling OEMCrypto_GetRandom", [&] {
|
|
random_sts = OEMCrypto_GetRandom(
|
|
reinterpret_cast<uint8_t*>(&request_id_base), sizeof(request_id_base));
|
|
});
|
|
metrics_->oemcrypto_get_random_.Increment(random_sts);
|
|
uint64_t request_id_index =
|
|
request_id_index_source_.fetch_add(1, std::memory_order_relaxed);
|
|
request_id_ = HexEncode(reinterpret_cast<uint8_t*>(&request_id_base),
|
|
sizeof(request_id_base)) +
|
|
HexEncode(reinterpret_cast<uint8_t*>(&request_id_index),
|
|
sizeof(request_id_index));
|
|
|
|
// Initialize key session
|
|
WithOecSessionLock("Open() calling key_session_.reset()", [&] {
|
|
key_session_.reset(new ContentKeySession(oec_session_id_, metrics_));
|
|
});
|
|
|
|
// Set up Usage Table support
|
|
//
|
|
// This MUST be the last thing in the function because it contains the
|
|
// successful return paths of the function. It will attempt to initialize
|
|
// usage tables. However, whether they are employed is determined by
|
|
// information in the license, which will not be received until later. In case
|
|
// usage tables are not even needed, initialization errors here are ignored by
|
|
// returning successfully.
|
|
//
|
|
// TODO(b/141350978): Refactor this code so that it does not have this
|
|
// problem.
|
|
if (!GetApiVersion(&api_version_)) {
|
|
LOGE("Failed to get API version");
|
|
return USAGE_SUPPORT_GET_API_FAILED;
|
|
}
|
|
|
|
CdmUsageSupportType usage_support_type;
|
|
result = GetUsageSupportType(&usage_support_type);
|
|
if (result == NO_ERROR) {
|
|
metrics_->oemcrypto_usage_table_support_.Record(usage_support_type);
|
|
if (usage_support_type == kUsageEntrySupport) {
|
|
CdmSecurityLevel security_level = GetSecurityLevel();
|
|
if (security_level == kSecurityLevelL1 ||
|
|
security_level == kSecurityLevelL3) {
|
|
// This block cannot use |WithStaticFieldWriteLock| because it needs
|
|
// to unlock the lock partway through.
|
|
LOGV("Static field write lock: Open() initializing usage table");
|
|
std::unique_lock<shared_mutex> auto_lock(static_field_mutex_);
|
|
|
|
UsageTableHeader** header = security_level == kSecurityLevelL1
|
|
? &usage_table_header_l1_
|
|
: &usage_table_header_l3_;
|
|
if (*header == nullptr) {
|
|
*header = new UsageTableHeader();
|
|
// Ignore errors since we do not know when a session is opened,
|
|
// if it is intended to be used for offline/usage session related
|
|
// or otherwise.
|
|
auto_lock.unlock();
|
|
bool is_usage_table_header_inited =
|
|
(*header)->Init(security_level, this);
|
|
auto_lock.lock();
|
|
if (!is_usage_table_header_inited) {
|
|
delete *header;
|
|
*header = nullptr;
|
|
usage_table_header_ = nullptr;
|
|
return NO_ERROR;
|
|
}
|
|
}
|
|
usage_table_header_ = *header;
|
|
metrics_->usage_table_header_initial_size_.Record((*header)->size());
|
|
} // End |static_field_mutex_| block.
|
|
}
|
|
} else {
|
|
metrics_->oemcrypto_usage_table_support_.SetError(result);
|
|
}
|
|
|
|
// Do not add logic after this point as it may never get exercised. In the
|
|
// event of errors initializing the usage tables, the code will return early,
|
|
// never reaching this point. See the comment above the "Set up Usage Table
|
|
// support" section for details.
|
|
//
|
|
// TODO(b/139973602): Refactor this code.
|
|
|
|
return NO_ERROR;
|
|
}
|
|
|
|
void CryptoSession::Close() {
|
|
LOGV("Closing crypto session: id = %u, open = %s", oec_session_id_,
|
|
open_ ? "true" : "false");
|
|
if (!open_) return;
|
|
|
|
OEMCryptoResult close_sts;
|
|
WithOecWriteLock(
|
|
"Close", [&] { close_sts = OEMCrypto_CloseSession(oec_session_id_); });
|
|
metrics_->oemcrypto_close_session_.Increment(close_sts);
|
|
if (OEMCrypto_SUCCESS == close_sts) open_ = false;
|
|
}
|
|
|
|
CdmResponseType CryptoSession::PrepareAndSignLicenseRequest(
|
|
const std::string& message, std::string* core_message,
|
|
std::string* signature) {
|
|
LOGV("Preparing and signing license request: id = %u", oec_session_id_);
|
|
RETURN_IF_NULL(signature, PARAMETER_NULL);
|
|
RETURN_IF_NULL(core_message, PARAMETER_NULL);
|
|
|
|
OEMCryptoResult sts;
|
|
size_t signature_length = 0;
|
|
size_t core_message_length = 0;
|
|
*core_message = "";
|
|
std::string combined_message = *core_message + message;
|
|
// First call is intended to determine the required size of the
|
|
// output buffers.
|
|
WithOecSessionLock("PrepareAndSignLicenseRequest", [&] {
|
|
M_TIME(sts = OEMCrypto_PrepAndSignLicenseRequest(
|
|
oec_session_id_,
|
|
reinterpret_cast<uint8_t*>(
|
|
const_cast<char*>(combined_message.data())),
|
|
combined_message.size(), &core_message_length, nullptr,
|
|
&signature_length),
|
|
metrics_, oemcrypto_prep_and_sign_license_request_, sts);
|
|
});
|
|
|
|
if (OEMCrypto_ERROR_SHORT_BUFFER != sts) {
|
|
return MapOEMCryptoResult(sts, GENERATE_SIGNATURE_ERROR,
|
|
"PrepareAndSignLicenseRequest");
|
|
}
|
|
|
|
// Resize.
|
|
core_message->resize(core_message_length);
|
|
signature->resize(signature_length);
|
|
|
|
combined_message = *core_message + message;
|
|
WithOecSessionLock("PrepareAndSignLicenseRequest", [&] {
|
|
M_TIME(sts = OEMCrypto_PrepAndSignLicenseRequest(
|
|
oec_session_id_,
|
|
reinterpret_cast<uint8_t*>(
|
|
const_cast<char*>(combined_message.data())),
|
|
combined_message.size(), &core_message_length,
|
|
reinterpret_cast<uint8_t*>(const_cast<char*>(signature->data())),
|
|
&signature_length),
|
|
metrics_, oemcrypto_prep_and_sign_license_request_, sts);
|
|
});
|
|
|
|
if (OEMCrypto_SUCCESS == sts) {
|
|
signature->resize(signature_length);
|
|
*core_message = std::move(combined_message);
|
|
// Truncate combined message to only contain the core message.
|
|
core_message->resize(core_message_length);
|
|
return NO_ERROR;
|
|
}
|
|
return MapOEMCryptoResult(sts, GENERATE_SIGNATURE_ERROR,
|
|
"PrepareAndSignLicenseRequest");
|
|
}
|
|
|
|
CdmResponseType CryptoSession::LoadKeys(
|
|
const std::string& message, const std::string& signature,
|
|
const std::string& mac_key_iv, const std::string& mac_key,
|
|
const std::vector<CryptoKey>& keys,
|
|
const std::string& provider_session_token,
|
|
const std::string& srm_requirement, CdmLicenseKeyType key_type) {
|
|
LOGV("Loading keys: id = %u", oec_session_id_);
|
|
OEMCryptoResult sts;
|
|
WithOecSessionLock("LoadKeys", [&] {
|
|
if (key_type == kLicenseKeyTypeEntitlement &&
|
|
key_session_->Type() != KeySession::kEntitlement) {
|
|
key_session_.reset(new EntitlementKeySession(oec_session_id_, metrics_));
|
|
}
|
|
|
|
LOGV("Loading key: id = %u", oec_session_id_);
|
|
sts = key_session_->LoadKeys(message, signature, mac_key_iv, mac_key, keys,
|
|
provider_session_token, srm_requirement);
|
|
});
|
|
|
|
if (sts != OEMCrypto_SUCCESS) {
|
|
LOGE("OEMCrypto_LoadKeys failed: status = %d", static_cast<int>(sts));
|
|
}
|
|
|
|
switch (sts) {
|
|
case OEMCrypto_SUCCESS:
|
|
if (!provider_session_token.empty())
|
|
update_usage_table_after_close_session_ = true;
|
|
return KEY_ADDED;
|
|
case OEMCrypto_ERROR_TOO_MANY_KEYS:
|
|
return INSUFFICIENT_CRYPTO_RESOURCES_4;
|
|
case OEMCrypto_ERROR_USAGE_TABLE_UNRECOVERABLE:
|
|
// Handle vendor specific error
|
|
return NEED_PROVISIONING;
|
|
default:
|
|
break;
|
|
}
|
|
return MapOEMCryptoResult(sts, LOAD_KEY_ERROR, "LoadKeys");
|
|
}
|
|
|
|
CdmResponseType CryptoSession::LoadLicense(const std::string& signed_message,
|
|
const std::string& core_message,
|
|
const std::string& signature) {
|
|
LOGV("Loading license: id = %u", oec_session_id_);
|
|
const std::string combined_message = core_message + signed_message;
|
|
OEMCryptoResult sts;
|
|
WithOecSessionLock("LoadLicense", [&] {
|
|
M_TIME(sts = OEMCrypto_LoadLicense(
|
|
oec_session_id_,
|
|
reinterpret_cast<const uint8_t*>(combined_message.data()),
|
|
combined_message.size(), core_message.size(),
|
|
reinterpret_cast<const uint8_t*>(signature.data()),
|
|
signature.size()),
|
|
metrics_, oemcrypto_load_license_, sts);
|
|
});
|
|
|
|
switch (sts) {
|
|
case OEMCrypto_SUCCESS:
|
|
return KEY_ADDED;
|
|
case OEMCrypto_ERROR_BUFFER_TOO_LARGE:
|
|
LOGE("LoadLicense buffer too large: size = %zu", combined_message.size());
|
|
return LOAD_LICENSE_ERROR;
|
|
case OEMCrypto_ERROR_TOO_MANY_KEYS:
|
|
LOGE("Too many keys in license");
|
|
return INSUFFICIENT_CRYPTO_RESOURCES_4;
|
|
default:
|
|
break;
|
|
}
|
|
return MapOEMCryptoResult(sts, LOAD_LICENSE_ERROR, "LoadLicense");
|
|
}
|
|
|
|
CdmResponseType CryptoSession::PrepareAndSignRenewalRequest(
|
|
const std::string& message, std::string* core_message,
|
|
std::string* signature) {
|
|
LOGV("Preparing and signing renewal request: id = %u", oec_session_id_);
|
|
if (signature == nullptr) {
|
|
LOGE("Output parameter |signature| not provided");
|
|
return PARAMETER_NULL;
|
|
}
|
|
if (core_message == nullptr) {
|
|
LOGE("Output parameter |core_message| not provided");
|
|
return PARAMETER_NULL;
|
|
}
|
|
|
|
OEMCryptoResult sts;
|
|
size_t signature_length = 0;
|
|
size_t core_message_length = 0;
|
|
*core_message = "";
|
|
std::string combined_message = *core_message + message;
|
|
// First call is intended to determine the required size of the
|
|
// output buffers.
|
|
WithOecSessionLock("PrepareAndSignRenewalRequest", [&] {
|
|
M_TIME(sts = OEMCrypto_PrepAndSignRenewalRequest(
|
|
oec_session_id_,
|
|
reinterpret_cast<uint8_t*>(
|
|
const_cast<char*>(combined_message.data())),
|
|
combined_message.size(), &core_message_length, nullptr,
|
|
&signature_length),
|
|
metrics_, oemcrypto_prep_and_sign_renewal_request_, sts);
|
|
});
|
|
|
|
if (OEMCrypto_ERROR_SHORT_BUFFER != sts) {
|
|
return MapOEMCryptoResult(sts, GENERATE_SIGNATURE_ERROR,
|
|
"PrepareAndSignRenewalRequest");
|
|
}
|
|
|
|
// Resize.
|
|
core_message->resize(core_message_length);
|
|
signature->resize(signature_length);
|
|
|
|
combined_message = *core_message + message;
|
|
WithOecSessionLock("PrepareAndSignRenewalRequest", [&] {
|
|
M_TIME(sts = OEMCrypto_PrepAndSignRenewalRequest(
|
|
oec_session_id_,
|
|
reinterpret_cast<uint8_t*>(
|
|
const_cast<char*>(combined_message.data())),
|
|
combined_message.size(), &core_message_length,
|
|
reinterpret_cast<uint8_t*>(const_cast<char*>(signature->data())),
|
|
&signature_length),
|
|
metrics_, oemcrypto_prep_and_sign_renewal_request_, sts);
|
|
});
|
|
|
|
if (OEMCrypto_SUCCESS == sts) {
|
|
signature->resize(signature_length);
|
|
*core_message = std::move(combined_message);
|
|
// Truncate combined message to only contain the core message.
|
|
core_message->resize(core_message_length);
|
|
return NO_ERROR;
|
|
}
|
|
return MapOEMCryptoResult(sts, GENERATE_SIGNATURE_ERROR,
|
|
"PrepareAndSignRenewalRequest");
|
|
}
|
|
|
|
CdmResponseType CryptoSession::RefreshKeys(
|
|
const std::string& message, const std::string& signature,
|
|
const std::vector<CryptoKey>& key_array) {
|
|
const uint8_t* msg = reinterpret_cast<const uint8_t*>(message.data());
|
|
std::vector<OEMCrypto_KeyRefreshObject> load_key_array(key_array.size());
|
|
for (size_t i = 0; i < key_array.size(); ++i) {
|
|
const CryptoKey* ki = &key_array[i];
|
|
OEMCrypto_KeyRefreshObject* ko = &load_key_array[i];
|
|
ko->key_id = GetSubstring(message, ki->key_id());
|
|
bool has_key_control = ki->HasKeyControl();
|
|
ko->key_control_iv =
|
|
GetSubstring(message, ki->key_control_iv(), !has_key_control);
|
|
ko->key_control =
|
|
GetSubstring(message, ki->key_control(), !has_key_control);
|
|
}
|
|
LOGV("Refreshing keys: id = %u", oec_session_id_);
|
|
OEMCryptoResult refresh_sts;
|
|
WithOecSessionLock("RefreshKeys", [&] {
|
|
M_TIME(refresh_sts = OEMCrypto_RefreshKeys(
|
|
oec_session_id_, msg, message.size(),
|
|
reinterpret_cast<const uint8_t*>(signature.data()),
|
|
signature.size(), key_array.size(), &load_key_array[0]),
|
|
metrics_, oemcrypto_refresh_keys_, refresh_sts);
|
|
});
|
|
|
|
if (refresh_sts == OEMCrypto_SUCCESS) return KEY_ADDED;
|
|
|
|
return MapOEMCryptoResult(refresh_sts, REFRESH_KEYS_ERROR, "RefreshKeys");
|
|
}
|
|
|
|
CdmResponseType CryptoSession::LoadRenewal(const std::string& signed_message,
|
|
const std::string& core_message,
|
|
const std::string& signature) {
|
|
LOGV("Loading license renewal: id = %u", oec_session_id_);
|
|
const std::string combined_message = core_message + signed_message;
|
|
OEMCryptoResult sts;
|
|
WithOecSessionLock("LoadRenewal", [&] {
|
|
M_TIME(sts = OEMCrypto_LoadRenewal(
|
|
oec_session_id_,
|
|
reinterpret_cast<const uint8_t*>(combined_message.data()),
|
|
combined_message.size(), core_message.size(),
|
|
reinterpret_cast<const uint8_t*>(signature.data()),
|
|
signature.size()),
|
|
metrics_, oemcrypto_load_renewal_, sts);
|
|
});
|
|
if (sts == OEMCrypto_SUCCESS) {
|
|
return KEY_ADDED;
|
|
}
|
|
if (sts == OEMCrypto_ERROR_BUFFER_TOO_LARGE) {
|
|
LOGE("Buffer too large: size = %zu", combined_message.size());
|
|
return LOAD_RENEWAL_ERROR;
|
|
}
|
|
return MapOEMCryptoResult(sts, LOAD_RENEWAL_ERROR, "LoadRenewal");
|
|
}
|
|
|
|
CdmResponseType CryptoSession::PrepareAndSignProvisioningRequest(
|
|
const std::string& message, std::string* core_message,
|
|
std::string* signature) {
|
|
LOGV("Preparing and signing provisioning request: id = %u", oec_session_id_);
|
|
if (signature == nullptr) {
|
|
LOGE("Output parameter |signature| not provided");
|
|
return PARAMETER_NULL;
|
|
}
|
|
if (core_message == nullptr) {
|
|
LOGE("Output parameter |core_message| not provided");
|
|
return PARAMETER_NULL;
|
|
}
|
|
|
|
if (pre_provision_token_type_ == kClientTokenKeybox) {
|
|
const CdmResponseType status = GenerateDerivedKeys(message);
|
|
if (status != NO_ERROR) return status;
|
|
} else if (pre_provision_token_type_ == kClientTokenOemCert) {
|
|
const OEMCryptoResult status = OEMCrypto_LoadOEMPrivateKey(oec_session_id_);
|
|
if (status != OEMCrypto_SUCCESS) {
|
|
return MapOEMCryptoResult(status, GET_TOKEN_FROM_OEM_CERT_ERROR,
|
|
"GetTokenFromOemCert");
|
|
}
|
|
} else {
|
|
LOGE("Unknown method %d", pre_provision_token_type_);
|
|
return UNKNOWN_CLIENT_TOKEN_TYPE;
|
|
}
|
|
|
|
OEMCryptoResult sts;
|
|
size_t signature_length = 0;
|
|
size_t core_message_length = 0;
|
|
*core_message = "";
|
|
std::string combined_message = *core_message + message;
|
|
// First call is intended to determine the required size of the
|
|
// output buffers.
|
|
WithOecSessionLock("PrepareAndSignProvisioningRequest", [&] {
|
|
M_TIME(sts = OEMCrypto_PrepAndSignProvisioningRequest(
|
|
oec_session_id_,
|
|
reinterpret_cast<uint8_t*>(
|
|
const_cast<char*>(combined_message.data())),
|
|
combined_message.size(), &core_message_length, nullptr,
|
|
&signature_length),
|
|
metrics_, oemcrypto_prep_and_sign_provisioning_request_, sts);
|
|
});
|
|
|
|
if (OEMCrypto_ERROR_SHORT_BUFFER != sts) {
|
|
return MapOEMCryptoResult(sts, GENERATE_SIGNATURE_ERROR,
|
|
"PrepareAndSignProvisioningRequest");
|
|
}
|
|
|
|
// Resize.
|
|
core_message->resize(core_message_length);
|
|
signature->resize(signature_length);
|
|
|
|
combined_message = *core_message + message;
|
|
WithOecSessionLock("PrepareAndSignProvisioningRequest", [&] {
|
|
M_TIME(sts = OEMCrypto_PrepAndSignProvisioningRequest(
|
|
oec_session_id_,
|
|
reinterpret_cast<uint8_t*>(
|
|
const_cast<char*>(combined_message.data())),
|
|
combined_message.size(), &core_message_length,
|
|
reinterpret_cast<uint8_t*>(const_cast<char*>(signature->data())),
|
|
&signature_length),
|
|
metrics_, oemcrypto_prep_and_sign_provisioning_request_, sts);
|
|
});
|
|
|
|
if (OEMCrypto_SUCCESS == sts) {
|
|
signature->resize(signature_length);
|
|
*core_message = std::move(combined_message);
|
|
// Truncate combined message to only contain the core message.
|
|
core_message->resize(core_message_length);
|
|
return NO_ERROR;
|
|
}
|
|
return MapOEMCryptoResult(sts, GENERATE_SIGNATURE_ERROR,
|
|
"PrepareAndSignProvisioningRequest");
|
|
}
|
|
|
|
CdmResponseType CryptoSession::LoadEntitledContentKeys(
|
|
const std::vector<CryptoKey>& key_array) {
|
|
OEMCryptoResult sts;
|
|
WithOecSessionLock("LoadEntitledContentKeys", [&] {
|
|
sts = key_session_->LoadEntitledContentKeys(key_array);
|
|
});
|
|
|
|
switch (sts) {
|
|
case OEMCrypto_SUCCESS:
|
|
return KEY_ADDED;
|
|
case OEMCrypto_ERROR_INSUFFICIENT_RESOURCES:
|
|
return INSUFFICIENT_CRYPTO_RESOURCES_6;
|
|
case OEMCrypto_ERROR_INVALID_CONTEXT:
|
|
return NOT_AN_ENTITLEMENT_SESSION;
|
|
case OEMCrypto_KEY_NOT_ENTITLED:
|
|
return NO_MATCHING_ENTITLEMENT_KEY;
|
|
case OEMCrypto_ERROR_SESSION_LOST_STATE:
|
|
return SESSION_LOST_STATE_ERROR;
|
|
case OEMCrypto_ERROR_SYSTEM_INVALIDATED:
|
|
return SYSTEM_INVALIDATED_ERROR;
|
|
default:
|
|
return LOAD_ENTITLED_CONTENT_KEYS_ERROR;
|
|
}
|
|
}
|
|
|
|
CdmResponseType CryptoSession::LoadCertificatePrivateKey(
|
|
const std::string& wrapped_key) {
|
|
// TODO(b/141655126): Getting the OEM Cert no longer loads the private key.
|
|
// Call OEMCrypto_GetOEMPublicCertificate before OEMCrypto_LoadDRMPrivateKey
|
|
// so it caches the OEMCrypto Public Key and then throw away result
|
|
std::string temp_buffer(CERTIFICATE_DATA_SIZE, '\0');
|
|
size_t buf_size = temp_buffer.size();
|
|
uint8_t* buf = reinterpret_cast<uint8_t*>(&temp_buffer[0]);
|
|
OEMCryptoResult sts;
|
|
WithOecSessionLock(
|
|
"LoadCertificatePrivateKey() calling OEMCrypto_GetOEMPublicCertificate",
|
|
[&] {
|
|
sts = OEMCrypto_GetOEMPublicCertificate(buf, &buf_size,
|
|
requested_security_level_);
|
|
});
|
|
metrics_->oemcrypto_get_oem_public_certificate_.Increment(sts);
|
|
|
|
LOGV("Loading device RSA key: id = %u", oec_session_id_);
|
|
// TODO(b/140813486): determine if cert is RSA or ECC.
|
|
WithOecSessionLock(
|
|
"LoadCertificatePrivateKey() calling OEMCrypto_LoadDRMPrivateKey()", [&] {
|
|
M_TIME(sts = OEMCrypto_LoadDRMPrivateKey(
|
|
oec_session_id_, OEMCrypto_RSA_Private_Key,
|
|
reinterpret_cast<const uint8_t*>(wrapped_key.data()),
|
|
wrapped_key.size()),
|
|
metrics_, oemcrypto_load_device_rsa_key_, sts);
|
|
});
|
|
|
|
return MapOEMCryptoResult(sts, LOAD_DEVICE_RSA_KEY_ERROR,
|
|
"LoadCertificatePrivateKey");
|
|
}
|
|
|
|
// Private.
|
|
CdmResponseType CryptoSession::SelectKey(const std::string& key_id,
|
|
CdmCipherMode cipher_mode) {
|
|
OEMCryptoResult sts;
|
|
WithOecSessionLock(
|
|
"SelectKey", [&] { sts = key_session_->SelectKey(key_id, cipher_mode); });
|
|
|
|
switch (sts) {
|
|
case OEMCrypto_SUCCESS:
|
|
return NO_ERROR;
|
|
case OEMCrypto_ERROR_KEY_EXPIRED:
|
|
return NEED_KEY;
|
|
case OEMCrypto_ERROR_INSUFFICIENT_HDCP:
|
|
return INSUFFICIENT_OUTPUT_PROTECTION;
|
|
case OEMCrypto_ERROR_ANALOG_OUTPUT:
|
|
return ANALOG_OUTPUT_ERROR;
|
|
case OEMCrypto_ERROR_INVALID_SESSION:
|
|
return INVALID_SESSION_1;
|
|
case OEMCrypto_ERROR_NO_DEVICE_KEY:
|
|
return NO_DEVICE_KEY_1;
|
|
case OEMCrypto_ERROR_NO_CONTENT_KEY:
|
|
return NO_CONTENT_KEY_2;
|
|
case OEMCrypto_KEY_NOT_LOADED: // obsolete.
|
|
return NO_CONTENT_KEY_3;
|
|
case OEMCrypto_ERROR_INSUFFICIENT_RESOURCES:
|
|
return INSUFFICIENT_CRYPTO_RESOURCES_2;
|
|
case OEMCrypto_ERROR_UNKNOWN_FAILURE:
|
|
return UNKNOWN_SELECT_KEY_ERROR_1;
|
|
case OEMCrypto_ERROR_SESSION_LOST_STATE:
|
|
return SESSION_LOST_STATE_ERROR;
|
|
case OEMCrypto_ERROR_SYSTEM_INVALIDATED:
|
|
return SYSTEM_INVALIDATED_ERROR;
|
|
case OEMCrypto_ERROR_CONTROL_INVALID:
|
|
case OEMCrypto_ERROR_KEYBOX_INVALID:
|
|
default:
|
|
return UNKNOWN_SELECT_KEY_ERROR_2;
|
|
}
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GenerateDerivedKeys(const std::string& message) {
|
|
OEMCryptoResult sts;
|
|
WithOecSessionLock("GenerateDerivedKeys without session_key",
|
|
[&] { sts = key_session_->GenerateDerivedKeys(message); });
|
|
|
|
return MapOEMCryptoResult(sts, GENERATE_DERIVED_KEYS_ERROR_2,
|
|
"GenerateDerivedKeys");
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GenerateDerivedKeys(
|
|
const std::string& message, const std::string& session_key) {
|
|
OEMCryptoResult sts;
|
|
WithOecSessionLock("GenerateDerivedKeys with session_key", [&] {
|
|
sts = key_session_->GenerateDerivedKeys(message, session_key);
|
|
});
|
|
|
|
return MapOEMCryptoResult(sts, GENERATE_DERIVED_KEYS_ERROR,
|
|
"GenerateDerivedKeys");
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GenerateRsaSignature(const std::string& message,
|
|
std::string* signature) {
|
|
LOGV("Generating RSA signature: id = %u", oec_session_id_);
|
|
RETURN_IF_NULL(signature, PARAMETER_NULL);
|
|
|
|
OEMCryptoResult sts;
|
|
signature->resize(kRsaSignatureLength);
|
|
size_t length = signature->size();
|
|
|
|
// At most two attempts.
|
|
// The first attempt may fail due to buffer too short
|
|
for (int i = 0; i < 2; ++i) {
|
|
WithOecSessionLock("GenerateRsaSignature", [&] {
|
|
M_TIME(
|
|
sts = OEMCrypto_GenerateRSASignature(
|
|
oec_session_id_, reinterpret_cast<const uint8_t*>(message.data()),
|
|
message.size(),
|
|
reinterpret_cast<uint8_t*>(const_cast<char*>(signature->data())),
|
|
&length, kSign_RSASSA_PSS),
|
|
metrics_, oemcrypto_generate_rsa_signature_, sts,
|
|
metrics::Pow2Bucket(length));
|
|
});
|
|
|
|
if (OEMCrypto_SUCCESS == sts) {
|
|
// Trim signature buffer and done
|
|
signature->resize(length);
|
|
return NO_ERROR;
|
|
}
|
|
if (OEMCrypto_ERROR_SHORT_BUFFER != sts) {
|
|
break;
|
|
}
|
|
|
|
// Retry with proper-sized signature buffer
|
|
signature->resize(length);
|
|
}
|
|
|
|
return MapOEMCryptoResult(sts, RSA_SIGNATURE_GENERATION_ERROR,
|
|
"OEMCrypto_GenerateRSASignature");
|
|
}
|
|
|
|
size_t CryptoSession::GetMaxSubsampleRegionSize() {
|
|
// If we haven't cached the answer yet, fetch it from OEMCrypto.
|
|
if (max_subsample_region_size_ == 0) {
|
|
uint32_t tier = 0;
|
|
if (GetResourceRatingTier(&tier)) {
|
|
// Subtract RESOURCE_RATING_TIER_MIN to get a 0-based index into the
|
|
// table.
|
|
const uint32_t index = tier - RESOURCE_RATING_TIER_MIN;
|
|
if (index < ArraySize(kMaxSubsampleRegionSizes)) {
|
|
max_subsample_region_size_ = kMaxSubsampleRegionSizes[index];
|
|
}
|
|
}
|
|
|
|
// If something went wrong, use the default.
|
|
if (max_subsample_region_size_ == 0) {
|
|
LOGW("Unable to get maximum subsample region size. Defaulting to %zu.",
|
|
kDefaultMaxSubsampleRegionSize);
|
|
max_subsample_region_size_ = kDefaultMaxSubsampleRegionSize;
|
|
}
|
|
}
|
|
|
|
return max_subsample_region_size_;
|
|
}
|
|
|
|
CdmResponseType CryptoSession::Decrypt(
|
|
const CdmDecryptionParametersV16& params) {
|
|
if (!is_destination_buffer_type_valid_) {
|
|
if (!SetDestinationBufferType()) return UNKNOWN_ERROR;
|
|
}
|
|
|
|
OEMCryptoBufferType output_descriptor_type =
|
|
params.is_secure ? destination_buffer_type_ : OEMCrypto_BufferType_Clear;
|
|
if (params.is_secure &&
|
|
output_descriptor_type == OEMCrypto_BufferType_Clear) {
|
|
return SECURE_BUFFER_REQUIRED;
|
|
}
|
|
|
|
if (params.samples.size() == 0) return CANNOT_DECRYPT_ZERO_SAMPLES;
|
|
if (std::any_of(std::begin(params.samples), std::end(params.samples),
|
|
[](const CdmDecryptionSample& sample) -> bool {
|
|
return sample.subsamples.size() == 0;
|
|
})) {
|
|
return CANNOT_DECRYPT_ZERO_SUBSAMPLES;
|
|
}
|
|
|
|
// Convert all the sample and subsample definitions to OEMCrypto structs.
|
|
// This code also caches whether any of the data is protected, to save later
|
|
// code the trouble of iterating over all the subsamples to check.
|
|
bool is_any_sample_protected = false;
|
|
std::vector<OEMCrypto_SampleDescription> oec_samples;
|
|
oec_samples.reserve(params.samples.size());
|
|
std::vector<std::vector<OEMCrypto_SubSampleDescription>>
|
|
oec_subsample_vectors;
|
|
oec_subsample_vectors.reserve(params.samples.size());
|
|
|
|
for (const CdmDecryptionSample& sample : params.samples) {
|
|
oec_samples.emplace_back();
|
|
OEMCrypto_SampleDescription& oec_sample = oec_samples.back();
|
|
|
|
// Set up the sample's input buffer
|
|
oec_sample.buffers.input_data = sample.encrypt_buffer;
|
|
oec_sample.buffers.input_data_length = sample.encrypt_buffer_length;
|
|
|
|
// Set up the sample's output buffer
|
|
OEMCrypto_DestBufferDesc& output_descriptor =
|
|
oec_sample.buffers.output_descriptor;
|
|
output_descriptor.type = output_descriptor_type;
|
|
switch (output_descriptor.type) {
|
|
case OEMCrypto_BufferType_Clear:
|
|
output_descriptor.buffer.clear.address =
|
|
static_cast<uint8_t*>(sample.decrypt_buffer) +
|
|
sample.decrypt_buffer_offset;
|
|
output_descriptor.buffer.clear.address_length =
|
|
sample.decrypt_buffer_size - sample.decrypt_buffer_offset;
|
|
break;
|
|
case OEMCrypto_BufferType_Secure:
|
|
output_descriptor.buffer.secure.handle = sample.decrypt_buffer;
|
|
output_descriptor.buffer.secure.offset = sample.decrypt_buffer_offset;
|
|
output_descriptor.buffer.secure.handle_length =
|
|
sample.decrypt_buffer_size;
|
|
break;
|
|
case OEMCrypto_BufferType_Direct:
|
|
output_descriptor.buffer.direct.is_video = params.is_video;
|
|
break;
|
|
}
|
|
|
|
// Convert all the sample's subsamples. This code also tallies the total
|
|
// size as a sanity check.
|
|
oec_subsample_vectors.emplace_back();
|
|
std::vector<OEMCrypto_SubSampleDescription>& oec_subsamples =
|
|
oec_subsample_vectors.back();
|
|
oec_subsamples.reserve(sample.subsamples.size());
|
|
size_t sample_size = 0;
|
|
bool is_any_subsample_protected = false;
|
|
size_t current_block_offset = 0;
|
|
for (const CdmDecryptionSubsample& subsample : sample.subsamples) {
|
|
oec_subsamples.push_back(OEMCrypto_SubSampleDescription{
|
|
subsample.clear_bytes, subsample.protected_bytes,
|
|
0, // subsample_flags
|
|
current_block_offset});
|
|
|
|
is_any_subsample_protected |= (subsample.protected_bytes > 0);
|
|
sample_size += subsample.clear_bytes + subsample.protected_bytes;
|
|
if (params.cipher_mode == kCipherModeCtr) {
|
|
current_block_offset =
|
|
(current_block_offset + subsample.protected_bytes) %
|
|
kAes128BlockSize;
|
|
}
|
|
|
|
// TODO(b/149524614): This block is not necessary except for
|
|
// backwards-compatibility while we are transitioning from the v15 API to
|
|
// the v16 API.
|
|
if (params.observe_legacy_fields) {
|
|
OEMCrypto_SubSampleDescription& oec_subsample = oec_subsamples.back();
|
|
oec_subsample.subsample_flags = subsample.flags;
|
|
oec_subsample.block_offset = subsample.block_offset;
|
|
}
|
|
}
|
|
|
|
is_any_sample_protected |= is_any_subsample_protected;
|
|
|
|
// TODO(b/149524614): This check is not necessary except for
|
|
// backwards-compatibility while we are transitioning from the v15 API to
|
|
// the v16 API.
|
|
if (!params.observe_legacy_fields) {
|
|
// Set the actual subsample_flags now that all the subsamples are
|
|
// converted.
|
|
oec_subsamples.front().subsample_flags |= OEMCrypto_FirstSubsample;
|
|
oec_subsamples.back().subsample_flags |= OEMCrypto_LastSubsample;
|
|
}
|
|
|
|
// Check that the total size is valid
|
|
if (sample_size != oec_sample.buffers.input_data_length)
|
|
return SAMPLE_AND_SUBSAMPLE_SIZE_MISMATCH;
|
|
|
|
// Set up the sample's IV
|
|
if (is_any_subsample_protected) {
|
|
if (sizeof(oec_sample.iv) != sample.iv.size()) return INVALID_IV_SIZE;
|
|
memcpy(oec_sample.iv, sample.iv.data(), sizeof(oec_sample.iv));
|
|
} else {
|
|
memset(oec_sample.iv, 0, sizeof(oec_sample.iv));
|
|
}
|
|
|
|
// Attach the subsamples to the sample description
|
|
oec_sample.subsamples = oec_subsamples.data();
|
|
oec_sample.subsamples_length = oec_subsamples.size();
|
|
}
|
|
|
|
// Convert the pattern descriptor
|
|
OEMCrypto_CENCEncryptPatternDesc oec_pattern{params.pattern.encrypt_blocks,
|
|
params.pattern.skip_blocks};
|
|
// TODO(b/146581957): Remove this workaround once OEMCrypto treats (0,0) as
|
|
// 'cbcs' instead of 'cbc1'.
|
|
if (params.cipher_mode == kCipherModeCbc && oec_pattern.encrypt == 0 &&
|
|
oec_pattern.skip == 0) {
|
|
// (10, 0) is the preferred pattern for decrypting every block in 'cbcs'
|
|
oec_pattern.encrypt = 10;
|
|
}
|
|
|
|
// Check if a key needs to be selected
|
|
if (is_any_sample_protected) {
|
|
CdmResponseType result = SelectKey(params.key_id, params.cipher_mode);
|
|
if (result != NO_ERROR) return result;
|
|
}
|
|
|
|
// Perform decrypt
|
|
const OEMCryptoResult sts =
|
|
DecryptMultipleSamples(oec_samples, params.cipher_mode, oec_pattern);
|
|
|
|
if (sts != OEMCrypto_SUCCESS && last_decrypt_error_ != sts) {
|
|
// Decrypt errors and warnings are only logged when the error code
|
|
// changes. This is in anticipation that if an error code is
|
|
// returned, then the same error code is likely to be returned in
|
|
// the next call. The calling application may make several more
|
|
// decrypt requests before the error is handled by the app.
|
|
last_decrypt_error_ = sts;
|
|
if (sts == OEMCrypto_WARNING_MIXED_OUTPUT_PROTECTION) {
|
|
LOGW(
|
|
"OEMCrypto_DecryptCENC is warning of mixed HDCP output protection: "
|
|
"oec_session_id = %u",
|
|
oec_session_id_);
|
|
} else {
|
|
LOGE("OEMCrypto_DecryptCENC failed: status = %d", static_cast<int>(sts));
|
|
}
|
|
}
|
|
|
|
switch (sts) {
|
|
case OEMCrypto_SUCCESS:
|
|
case OEMCrypto_WARNING_MIXED_OUTPUT_PROTECTION:
|
|
return NO_ERROR;
|
|
case OEMCrypto_ERROR_INSUFFICIENT_RESOURCES:
|
|
return INSUFFICIENT_CRYPTO_RESOURCES_5;
|
|
case OEMCrypto_ERROR_KEY_EXPIRED:
|
|
return NEED_KEY;
|
|
case OEMCrypto_ERROR_INVALID_SESSION:
|
|
return INVALID_SESSION_2;
|
|
case OEMCrypto_ERROR_DECRYPT_FAILED:
|
|
case OEMCrypto_ERROR_UNKNOWN_FAILURE:
|
|
return DECRYPT_ERROR;
|
|
case OEMCrypto_ERROR_INSUFFICIENT_HDCP:
|
|
return INSUFFICIENT_OUTPUT_PROTECTION;
|
|
case OEMCrypto_ERROR_ANALOG_OUTPUT:
|
|
return ANALOG_OUTPUT_ERROR;
|
|
case OEMCrypto_ERROR_OUTPUT_TOO_LARGE:
|
|
return OUTPUT_TOO_LARGE_ERROR;
|
|
case OEMCrypto_ERROR_SESSION_LOST_STATE:
|
|
return SESSION_LOST_STATE_ERROR;
|
|
case OEMCrypto_ERROR_SYSTEM_INVALIDATED:
|
|
return SYSTEM_INVALIDATED_ERROR;
|
|
default:
|
|
return UNKNOWN_ERROR;
|
|
}
|
|
}
|
|
|
|
bool CryptoSession::UsageInformationSupport(bool* has_support) {
|
|
LOGV("Checking if usage information is supported");
|
|
RETURN_IF_NOT_OPEN(false);
|
|
return UsageInformationSupport(requested_security_level_, has_support);
|
|
}
|
|
|
|
bool CryptoSession::UsageInformationSupport(SecurityLevel security_level,
|
|
bool* has_support) {
|
|
LOGV("Checking if usage information is supported: security_level = %d",
|
|
static_cast<int>(security_level));
|
|
RETURN_IF_UNINITIALIZED(false);
|
|
WithOecReadLock("UsageInformationSupport", [&] {
|
|
*has_support = OEMCrypto_SupportsUsageTable(security_level);
|
|
});
|
|
return true;
|
|
}
|
|
|
|
CdmResponseType CryptoSession::DeactivateUsageInformation(
|
|
const std::string& provider_session_token) {
|
|
LOGV("Deactivating usage information: id = %u", oec_session_id_);
|
|
|
|
uint8_t* pst = reinterpret_cast<uint8_t*>(
|
|
const_cast<char*>(provider_session_token.data()));
|
|
|
|
// TODO(fredgc or rfrias): make sure oec_session_id_ is valid.
|
|
OEMCryptoResult status;
|
|
WithOecWriteLock("DeactivateUsageInformation", [&] {
|
|
status = OEMCrypto_DeactivateUsageEntry(oec_session_id_, pst,
|
|
provider_session_token.length());
|
|
});
|
|
metrics_->oemcrypto_deactivate_usage_entry_.Increment(status);
|
|
|
|
if (status != OEMCrypto_SUCCESS) {
|
|
LOGE("OEMCrypto_DeactivateUsageEntry failed: status = %d",
|
|
static_cast<int>(status));
|
|
}
|
|
|
|
switch (status) {
|
|
case OEMCrypto_SUCCESS:
|
|
return NO_ERROR;
|
|
case OEMCrypto_ERROR_INVALID_CONTEXT:
|
|
return KEY_CANCELED;
|
|
case OEMCrypto_ERROR_SESSION_LOST_STATE:
|
|
return SESSION_LOST_STATE_ERROR;
|
|
case OEMCrypto_ERROR_SYSTEM_INVALIDATED:
|
|
return SYSTEM_INVALIDATED_ERROR;
|
|
default:
|
|
return DEACTIVATE_USAGE_ENTRY_ERROR;
|
|
}
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GenerateUsageReport(
|
|
const std::string& provider_session_token, std::string* usage_report,
|
|
UsageDurationStatus* usage_duration_status, int64_t* seconds_since_started,
|
|
int64_t* seconds_since_last_played) {
|
|
LOGV("Generating usage report: id = %u", oec_session_id_);
|
|
|
|
RETURN_IF_NULL(usage_report, PARAMETER_NULL);
|
|
|
|
uint8_t* pst = reinterpret_cast<uint8_t*>(
|
|
const_cast<char*>(provider_session_token.data()));
|
|
|
|
size_t usage_length = 0;
|
|
OEMCryptoResult status;
|
|
WithOecWriteLock("GenerateUsageReport Attempt 1", [&] {
|
|
status = OEMCrypto_ReportUsage(oec_session_id_, pst,
|
|
provider_session_token.length(), nullptr,
|
|
&usage_length);
|
|
});
|
|
metrics_->oemcrypto_report_usage_.Increment(status);
|
|
|
|
if (status != OEMCrypto_SUCCESS && status != OEMCrypto_ERROR_SHORT_BUFFER) {
|
|
return MapOEMCryptoResult(status, GENERATE_USAGE_REPORT_ERROR,
|
|
"GenerateUsageReport");
|
|
}
|
|
|
|
std::vector<uint8_t> buffer(usage_length);
|
|
|
|
WithOecWriteLock("GenerateUsageReport Attempt 2", [&] {
|
|
status = OEMCrypto_ReportUsage(oec_session_id_, pst,
|
|
provider_session_token.length(), &buffer[0],
|
|
&usage_length);
|
|
});
|
|
metrics_->oemcrypto_report_usage_.Increment(status);
|
|
|
|
if (status != OEMCrypto_SUCCESS) {
|
|
return MapOEMCryptoResult(status, GENERATE_USAGE_REPORT_ERROR,
|
|
"OEMCrypto_ReportUsage");
|
|
}
|
|
|
|
if (usage_length != buffer.size()) {
|
|
buffer.resize(usage_length);
|
|
}
|
|
(*usage_report) =
|
|
std::string(reinterpret_cast<const char*>(&buffer[0]), buffer.size());
|
|
|
|
Unpacked_PST_Report pst_report(&buffer[0]);
|
|
*usage_duration_status = kUsageDurationsInvalid;
|
|
if (usage_length < pst_report.report_size()) {
|
|
LOGE(
|
|
"Parsed usage report smaller than expected: "
|
|
"usage_length = %zu, report_size = %zu",
|
|
usage_length, pst_report.report_size());
|
|
return NO_ERROR; // usage report available but no duration information
|
|
}
|
|
|
|
if (kUnused == pst_report.status()) {
|
|
*usage_duration_status = kUsageDurationPlaybackNotBegun;
|
|
return NO_ERROR;
|
|
}
|
|
LOGV("OEMCrypto_PST_Report.status: %d\n",
|
|
static_cast<int>(pst_report.status()));
|
|
LOGV("OEMCrypto_PST_Report.clock_security_level: %d\n",
|
|
static_cast<int>(pst_report.clock_security_level()));
|
|
LOGV("OEMCrypto_PST_Report.pst_length: %d\n",
|
|
static_cast<int>(pst_report.pst_length()));
|
|
LOGV("OEMCrypto_PST_Report.padding: %d\n",
|
|
static_cast<int>(pst_report.padding()));
|
|
LOGV("OEMCrypto_PST_Report.seconds_since_license_received: %ld\n",
|
|
pst_report.seconds_since_license_received());
|
|
LOGV("OEMCrypto_PST_Report.seconds_since_first_decrypt: %ld\n",
|
|
pst_report.seconds_since_first_decrypt());
|
|
LOGV("OEMCrypto_PST_Report.seconds_since_last_decrypt: %ld\n",
|
|
pst_report.seconds_since_last_decrypt());
|
|
LOGV("OEMCrypto_PST_Report: %s\n", b2a_hex(*usage_report).c_str());
|
|
|
|
if (kInactiveUnused == pst_report.status()) {
|
|
*usage_duration_status = kUsageDurationPlaybackNotBegun;
|
|
return NO_ERROR;
|
|
}
|
|
// Before OEMCrypto v13, When usage report state is inactive, we have to
|
|
// deduce whether the license was ever used.
|
|
if (kInactive == pst_report.status() &&
|
|
(0 > pst_report.seconds_since_first_decrypt() ||
|
|
pst_report.seconds_since_license_received() <
|
|
pst_report.seconds_since_first_decrypt())) {
|
|
*usage_duration_status = kUsageDurationPlaybackNotBegun;
|
|
return NO_ERROR;
|
|
}
|
|
|
|
*usage_duration_status = kUsageDurationsValid;
|
|
*seconds_since_started = pst_report.seconds_since_first_decrypt();
|
|
*seconds_since_last_played = pst_report.seconds_since_last_decrypt();
|
|
return NO_ERROR;
|
|
}
|
|
|
|
bool CryptoSession::IsAntiRollbackHwPresent() {
|
|
bool is_present;
|
|
WithOecReadLock("IsAntiRollbackHwPresent", [&] {
|
|
is_present = OEMCrypto_IsAntiRollbackHwPresent(requested_security_level_);
|
|
});
|
|
metrics_->oemcrypto_is_anti_rollback_hw_present_.Record(is_present);
|
|
return is_present;
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GenerateNonce(uint32_t* nonce) {
|
|
RETURN_IF_NULL(nonce, PARAMETER_NULL);
|
|
|
|
OEMCryptoResult result;
|
|
WithOecWriteLock("GenerateNonce", [&] {
|
|
result = OEMCrypto_GenerateNonce(oec_session_id_, nonce);
|
|
});
|
|
metrics_->oemcrypto_generate_nonce_.Increment(result);
|
|
|
|
return MapOEMCryptoResult(result, NONCE_GENERATION_ERROR, "GenerateNonce");
|
|
}
|
|
|
|
bool CryptoSession::SetDestinationBufferType() {
|
|
if (Properties::oem_crypto_use_secure_buffers()) {
|
|
destination_buffer_type_ = OEMCrypto_BufferType_Secure;
|
|
} else if (Properties::oem_crypto_use_fifo()) {
|
|
destination_buffer_type_ = OEMCrypto_BufferType_Direct;
|
|
} else if (Properties::oem_crypto_use_userspace_buffers()) {
|
|
destination_buffer_type_ = OEMCrypto_BufferType_Clear;
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
is_destination_buffer_type_valid_ = true;
|
|
return true;
|
|
}
|
|
|
|
CdmResponseType CryptoSession::LoadProvisioning(
|
|
const std::string& signed_message, const std::string& core_message,
|
|
const std::string& signature, std::string* wrapped_private_key) {
|
|
LOGV("Loading provisioning certificate: id = %u", oec_session_id_);
|
|
if (wrapped_private_key == nullptr) {
|
|
LOGE("Missing wrapped |wrapped_private_key|");
|
|
return PARAMETER_NULL;
|
|
}
|
|
|
|
const std::string combined_message = core_message + signed_message;
|
|
// Round 1, get the size of the wrapped private key buffer.
|
|
size_t wrapped_private_key_length = 0;
|
|
OEMCryptoResult status;
|
|
WithOecSessionLock("LoadProvisioning Attempt 1", [&] {
|
|
M_TIME(status = OEMCrypto_LoadProvisioning(
|
|
oec_session_id_,
|
|
reinterpret_cast<const uint8_t*>(combined_message.data()),
|
|
combined_message.size(), core_message.size(),
|
|
reinterpret_cast<const uint8_t*>(signature.data()),
|
|
signature.size(), nullptr, &wrapped_private_key_length),
|
|
metrics_, oemcrypto_load_provisioning_, status);
|
|
});
|
|
|
|
if (status != OEMCrypto_ERROR_SHORT_BUFFER) {
|
|
return MapOEMCryptoResult(status, LOAD_PROVISIONING_ERROR,
|
|
"LoadProvisioning");
|
|
}
|
|
|
|
wrapped_private_key->resize(wrapped_private_key_length);
|
|
|
|
WithOecSessionLock("LoadProvisioning Attempt 2", [&] {
|
|
M_TIME(status = OEMCrypto_LoadProvisioning(
|
|
oec_session_id_,
|
|
reinterpret_cast<const uint8_t*>(combined_message.data()),
|
|
combined_message.size(), core_message.size(),
|
|
reinterpret_cast<const uint8_t*>(signature.data()),
|
|
signature.size(),
|
|
reinterpret_cast<uint8_t*>(&wrapped_private_key->front()),
|
|
&wrapped_private_key_length),
|
|
metrics_, oemcrypto_load_provisioning_, status);
|
|
});
|
|
|
|
return MapOEMCryptoResult(status, LOAD_PROVISIONING_ERROR,
|
|
"LoadProvisioning");
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GetHdcpCapabilities(HdcpCapability* current,
|
|
HdcpCapability* max) {
|
|
LOGV("Getting HDCP capabilities: id = %u", oec_session_id_);
|
|
RETURN_IF_NOT_OPEN(CRYPTO_SESSION_NOT_OPEN);
|
|
return GetHdcpCapabilities(requested_security_level_, current, max);
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GetHdcpCapabilities(SecurityLevel security_level,
|
|
HdcpCapability* current,
|
|
HdcpCapability* max) {
|
|
LOGV("Getting HDCP capabilities: id = %u, security_level = %d",
|
|
oec_session_id_, static_cast<int>(security_level));
|
|
RETURN_IF_UNINITIALIZED(CRYPTO_SESSION_NOT_INITIALIZED);
|
|
RETURN_IF_NULL(current, PARAMETER_NULL);
|
|
RETURN_IF_NULL(max, PARAMETER_NULL);
|
|
|
|
OEMCryptoResult status;
|
|
WithOecReadLock("GetHdcpCapabilities", [&] {
|
|
status = OEMCrypto_GetHDCPCapability(security_level, current, max);
|
|
});
|
|
|
|
if (OEMCrypto_SUCCESS == status) {
|
|
metrics_->oemcrypto_current_hdcp_capability_.Record(*current);
|
|
metrics_->oemcrypto_max_hdcp_capability_.Record(*max);
|
|
} else {
|
|
metrics_->oemcrypto_current_hdcp_capability_.SetError(status);
|
|
metrics_->oemcrypto_max_hdcp_capability_.SetError(status);
|
|
}
|
|
|
|
return MapOEMCryptoResult(status, GET_HDCP_CAPABILITY_FAILED,
|
|
"GetHDCPCapability");
|
|
}
|
|
|
|
bool CryptoSession::GetSupportedCertificateTypes(
|
|
SupportedCertificateTypes* support) {
|
|
LOGV("Getting supported certificate types: id = %u", oec_session_id_);
|
|
RETURN_IF_UNINITIALIZED(false);
|
|
RETURN_IF_NULL(support, false);
|
|
|
|
uint32_t oec_support;
|
|
WithOecReadLock("GetSupportedCertificateTypes", [&] {
|
|
oec_support = OEMCrypto_SupportedCertificates(requested_security_level_);
|
|
});
|
|
support->rsa_2048_bit = oec_support & OEMCrypto_Supports_RSA_2048bit;
|
|
support->rsa_3072_bit = oec_support & OEMCrypto_Supports_RSA_3072bit;
|
|
support->rsa_cast = oec_support & OEMCrypto_Supports_RSA_CAST;
|
|
return true;
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GetRandom(size_t data_length,
|
|
uint8_t* random_data) {
|
|
RETURN_IF_NULL(random_data, PARAMETER_NULL);
|
|
|
|
OEMCryptoResult sts;
|
|
WithOecReadLock("GetRandom",
|
|
[&] { sts = OEMCrypto_GetRandom(random_data, data_length); });
|
|
metrics_->oemcrypto_get_random_.Increment(sts);
|
|
|
|
return MapOEMCryptoResult(sts, RANDOM_GENERATION_ERROR, "GetRandom");
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GetNumberOfOpenSessions(
|
|
SecurityLevel security_level, size_t* count) {
|
|
LOGV("Getting number of open sessions: id = %u, security_level = %d",
|
|
oec_session_id_, static_cast<int>(security_level));
|
|
RETURN_IF_UNINITIALIZED(CRYPTO_SESSION_NOT_INITIALIZED);
|
|
RETURN_IF_NULL(count, PARAMETER_NULL);
|
|
|
|
size_t sessions_count;
|
|
OEMCryptoResult status;
|
|
WithOecReadLock("GetNumberOfOpenSessions", [&] {
|
|
status = OEMCrypto_GetNumberOfOpenSessions(security_level, &sessions_count);
|
|
});
|
|
|
|
if (OEMCrypto_SUCCESS == status) {
|
|
metrics_->oemcrypto_number_of_open_sessions_.Record(sessions_count);
|
|
*count = sessions_count;
|
|
} else {
|
|
metrics_->oemcrypto_number_of_open_sessions_.SetError(status);
|
|
}
|
|
|
|
return MapOEMCryptoResult(status, GET_NUMBER_OF_OPEN_SESSIONS_ERROR,
|
|
"GetNumberOfOpenSessions");
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GetMaxNumberOfSessions(
|
|
SecurityLevel security_level, size_t* max) {
|
|
LOGV("Getting max number of sessions: id = %u, security_level = %d",
|
|
oec_session_id_, static_cast<int>(security_level));
|
|
RETURN_IF_UNINITIALIZED(CRYPTO_SESSION_NOT_INITIALIZED);
|
|
RETURN_IF_NULL(max, PARAMETER_NULL);
|
|
|
|
size_t max_sessions = 0;
|
|
OEMCryptoResult status;
|
|
WithOecReadLock("GetMaxNumberOfSessions", [&] {
|
|
status = OEMCrypto_GetMaxNumberOfSessions(security_level, &max_sessions);
|
|
});
|
|
|
|
if (OEMCrypto_SUCCESS == status) {
|
|
metrics_->oemcrypto_max_number_of_sessions_.Record(max_sessions);
|
|
*max = max_sessions;
|
|
} else {
|
|
metrics_->oemcrypto_max_number_of_sessions_.SetError(status);
|
|
}
|
|
|
|
return MapOEMCryptoResult(status, GET_MAX_NUMBER_OF_OPEN_SESSIONS_ERROR,
|
|
"GetMaxNumberOfOpenSessions");
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GetSrmVersion(uint16_t* srm_version) {
|
|
LOGV("Getting SRM version");
|
|
RETURN_IF_UNINITIALIZED(CRYPTO_SESSION_NOT_INITIALIZED);
|
|
RETURN_IF_NULL(srm_version, PARAMETER_NULL);
|
|
|
|
OEMCryptoResult status;
|
|
WithOecReadLock("GetSrmVersion", [&] {
|
|
status = OEMCrypto_GetCurrentSRMVersion(srm_version);
|
|
});
|
|
|
|
// SRM is an optional feature. Whether it is implemented is up to the
|
|
// discretion of OEMs
|
|
if (status == OEMCrypto_ERROR_NOT_IMPLEMENTED) {
|
|
LOGV("OEMCrypto_GetCurrentSRMVersion not implemented");
|
|
return NOT_IMPLEMENTED_ERROR;
|
|
}
|
|
|
|
return MapOEMCryptoResult(status, GET_SRM_VERSION_ERROR,
|
|
"GetCurrentSRMVersion");
|
|
}
|
|
|
|
bool CryptoSession::IsSrmUpdateSupported() {
|
|
LOGV("Checking if SRM update is supported");
|
|
if (!IsInitialized()) return false;
|
|
return WithOecReadLock("IsSrmUpdateSupported",
|
|
[&] { return OEMCrypto_IsSRMUpdateSupported(); });
|
|
}
|
|
|
|
CdmResponseType CryptoSession::LoadSrm(const std::string& srm) {
|
|
LOGV("Loading SRM");
|
|
RETURN_IF_UNINITIALIZED(CRYPTO_SESSION_NOT_INITIALIZED);
|
|
if (srm.empty()) {
|
|
LOGE("SRM is empty");
|
|
return INVALID_SRM_LIST;
|
|
}
|
|
|
|
OEMCryptoResult status;
|
|
WithOecWriteLock("LoadSrm", [&] {
|
|
status = OEMCrypto_LoadSRM(reinterpret_cast<const uint8_t*>(srm.data()),
|
|
srm.size());
|
|
});
|
|
|
|
return MapOEMCryptoResult(status, LOAD_SRM_ERROR, "LoadSRM");
|
|
}
|
|
|
|
bool CryptoSession::GetResourceRatingTier(uint32_t* tier) {
|
|
LOGV("Getting resource rating tier");
|
|
RETURN_IF_NOT_OPEN(false);
|
|
return GetResourceRatingTier(requested_security_level_, tier);
|
|
}
|
|
|
|
bool CryptoSession::GetResourceRatingTier(SecurityLevel security_level,
|
|
uint32_t* tier) {
|
|
LOGV("Getting resource rating tier: security_level = %d",
|
|
static_cast<int>(security_level));
|
|
RETURN_IF_UNINITIALIZED(false);
|
|
RETURN_IF_NULL(tier, false);
|
|
|
|
WithOecReadLock("GetResourceRatingTier", [&] {
|
|
*tier = OEMCrypto_ResourceRatingTier(security_level);
|
|
metrics_->oemcrypto_resource_rating_tier_.Record(*tier);
|
|
});
|
|
if (*tier < RESOURCE_RATING_TIER_MIN || *tier > RESOURCE_RATING_TIER_MAX) {
|
|
uint32_t api_version;
|
|
if (GetApiVersion(security_level, &api_version)) {
|
|
if (api_version >= OEM_CRYPTO_API_VERSION_SUPPORTS_RESOURCE_RATING_TIER) {
|
|
LOGW("Invalid resource rating tier: %u", *tier);
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool CryptoSession::GetBuildInformation(std::string* info) {
|
|
LOGV("Getting build information");
|
|
RETURN_IF_NOT_OPEN(false);
|
|
return GetBuildInformation(requested_security_level_, info);
|
|
}
|
|
|
|
bool CryptoSession::GetBuildInformation(SecurityLevel security_level,
|
|
std::string* info) {
|
|
LOGV("Getting build information: security_level = %d",
|
|
static_cast<int>(security_level));
|
|
RETURN_IF_UNINITIALIZED(false);
|
|
RETURN_IF_NULL(info, false);
|
|
|
|
const char* build_information;
|
|
WithOecReadLock("GetBuildInformation", [&] {
|
|
build_information = OEMCrypto_BuildInformation(security_level);
|
|
});
|
|
if (build_information == nullptr) {
|
|
LOGE("OEMCrypto_BuildInformation failed: Returned null");
|
|
return false;
|
|
}
|
|
|
|
info->assign(build_information);
|
|
return true;
|
|
}
|
|
|
|
bool CryptoSession::GetMaximumUsageTableEntries(SecurityLevel security_level,
|
|
size_t* number_of_entries) {
|
|
LOGV("Getting maximum usage table entries: security_level = %d",
|
|
static_cast<int>(security_level));
|
|
RETURN_IF_UNINITIALIZED(false);
|
|
if (number_of_entries == nullptr) {
|
|
LOGE("Output parameter |number_of_entries| not provided");
|
|
return false;
|
|
}
|
|
WithOecReadLock("GetMaxUsageTableEntries", [&] {
|
|
*number_of_entries = OEMCrypto_MaximumUsageTableHeaderSize(security_level);
|
|
});
|
|
// Record the number of entries into the metrics.
|
|
metrics_->oemcrypto_maximum_usage_table_header_size_.Record(
|
|
*number_of_entries);
|
|
|
|
return *number_of_entries >= kMinimumUsageTableEntriesSupported;
|
|
}
|
|
|
|
bool CryptoSession::GetDecryptHashSupport(SecurityLevel security_level,
|
|
uint32_t* decrypt_hash_support) {
|
|
LOGV("Checking if decrypt hash is supported");
|
|
RETURN_IF_UNINITIALIZED(false);
|
|
RETURN_IF_NULL(decrypt_hash_support, false);
|
|
|
|
WithOecReadLock("GetDecryptHashSupport", [&] {
|
|
*decrypt_hash_support = OEMCrypto_SupportsDecryptHash(security_level);
|
|
});
|
|
switch (*decrypt_hash_support) {
|
|
case OEMCrypto_Hash_Not_Supported:
|
|
case OEMCrypto_CRC_Clear_Buffer:
|
|
case OEMCrypto_Partner_Defined_Hash:
|
|
break;
|
|
default:
|
|
// Not flagging an error since it is only used in test
|
|
LOGW("OEMCrypto_SupportsDecryptHash unrecognized result = %d",
|
|
static_cast<int>(*decrypt_hash_support));
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
CdmResponseType CryptoSession::SetDecryptHash(uint32_t frame_number,
|
|
const std::string& hash) {
|
|
LOGV("Setting decrypt hash");
|
|
OEMCryptoResult sts;
|
|
WithOecSessionLock("SetDecryptHash", [&] {
|
|
sts = OEMCrypto_SetDecryptHash(
|
|
oec_session_id_, frame_number,
|
|
reinterpret_cast<const uint8_t*>(hash.data()), hash.size());
|
|
metrics_->oemcrypto_set_decrypt_hash_.Increment(sts);
|
|
});
|
|
|
|
return MapOEMCryptoResult(sts, SET_DECRYPT_HASH_ERROR, "SetDecryptHash");
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GetDecryptHashError(std::string* error_string) {
|
|
LOGV("Getting decrypt hash error");
|
|
RETURN_IF_NULL(error_string, PARAMETER_NULL);
|
|
error_string->clear();
|
|
|
|
uint32_t failed_frame_number = 0;
|
|
OEMCryptoResult sts;
|
|
WithOecSessionLock("GetDecryptHashError", [&] {
|
|
sts = OEMCrypto_GetHashErrorCode(oec_session_id_, &failed_frame_number);
|
|
});
|
|
error_string->assign(std::to_string(sts));
|
|
|
|
if (sts != OEMCrypto_SUCCESS) {
|
|
LOGE("OEMCrypto_GetHashErrorCode failed: status = %d",
|
|
static_cast<int>(sts));
|
|
}
|
|
|
|
switch (sts) {
|
|
case OEMCrypto_SUCCESS:
|
|
case OEMCrypto_ERROR_BAD_HASH:
|
|
error_string->assign(std::to_string(sts));
|
|
error_string->append(",");
|
|
error_string->append(std::to_string(failed_frame_number));
|
|
return NO_ERROR;
|
|
case OEMCrypto_ERROR_SESSION_LOST_STATE:
|
|
return SESSION_LOST_STATE_ERROR;
|
|
case OEMCrypto_ERROR_SYSTEM_INVALIDATED:
|
|
return SYSTEM_INVALIDATED_ERROR;
|
|
case OEMCrypto_ERROR_UNKNOWN_FAILURE:
|
|
case OEMCrypto_ERROR_NOT_IMPLEMENTED:
|
|
default:
|
|
return GET_DECRYPT_HASH_ERROR;
|
|
}
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GenericEncrypt(const std::string& in_buffer,
|
|
const std::string& key_id,
|
|
const std::string& iv,
|
|
CdmEncryptionAlgorithm algorithm,
|
|
std::string* out_buffer) {
|
|
LOGV("Generic encrypt: id = %u", oec_session_id_);
|
|
RETURN_IF_NULL(out_buffer, PARAMETER_NULL);
|
|
|
|
OEMCrypto_Algorithm oec_algorithm = GenericEncryptionAlgorithm(algorithm);
|
|
if (iv.size() != GenericEncryptionBlockSize(algorithm) ||
|
|
oec_algorithm == kInvalidAlgorithm) {
|
|
return INVALID_PARAMETERS_ENG_13;
|
|
}
|
|
|
|
if (out_buffer->size() < in_buffer.size()) {
|
|
out_buffer->resize(in_buffer.size());
|
|
}
|
|
|
|
// TODO(jfore): We need to select a key with a cipher mode and algorithm
|
|
// doesn't seem to fit. Is it ok to just use a default value here?
|
|
// Or do we need to pass it in?
|
|
CdmResponseType result = SelectKey(key_id, kCipherModeCbc);
|
|
if (result != NO_ERROR) return result;
|
|
|
|
OEMCryptoResult sts;
|
|
|
|
WithOecSessionLock("GenericEncrypt", [&] {
|
|
M_TIME(
|
|
sts = OEMCrypto_Generic_Encrypt(
|
|
oec_session_id_, reinterpret_cast<const uint8_t*>(in_buffer.data()),
|
|
in_buffer.size(), reinterpret_cast<const uint8_t*>(iv.data()),
|
|
oec_algorithm,
|
|
reinterpret_cast<uint8_t*>(const_cast<char*>(out_buffer->data()))),
|
|
metrics_, oemcrypto_generic_encrypt_, sts,
|
|
metrics::Pow2Bucket(in_buffer.size()));
|
|
});
|
|
|
|
if (OEMCrypto_SUCCESS != sts) {
|
|
LOGE("OEMCrypto_Generic_Encrypt failed: status = %d",
|
|
static_cast<int>(sts));
|
|
}
|
|
|
|
switch (sts) {
|
|
case OEMCrypto_SUCCESS:
|
|
return NO_ERROR;
|
|
case OEMCrypto_ERROR_KEY_EXPIRED:
|
|
return NEED_KEY;
|
|
case OEMCrypto_ERROR_NO_CONTENT_KEY:
|
|
case OEMCrypto_KEY_NOT_LOADED: // obsolete in v15.
|
|
return KEY_NOT_FOUND_3;
|
|
case OEMCrypto_ERROR_OUTPUT_TOO_LARGE:
|
|
return OUTPUT_TOO_LARGE_ERROR;
|
|
case OEMCrypto_ERROR_SESSION_LOST_STATE:
|
|
return SESSION_LOST_STATE_ERROR;
|
|
case OEMCrypto_ERROR_SYSTEM_INVALIDATED:
|
|
return SYSTEM_INVALIDATED_ERROR;
|
|
default:
|
|
return UNKNOWN_ERROR;
|
|
}
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GenericDecrypt(const std::string& in_buffer,
|
|
const std::string& key_id,
|
|
const std::string& iv,
|
|
CdmEncryptionAlgorithm algorithm,
|
|
std::string* out_buffer) {
|
|
LOGV("Generic decrypt: id = %u", oec_session_id_);
|
|
RETURN_IF_NULL(out_buffer, PARAMETER_NULL);
|
|
|
|
OEMCrypto_Algorithm oec_algorithm = GenericEncryptionAlgorithm(algorithm);
|
|
if (iv.size() != GenericEncryptionBlockSize(algorithm) ||
|
|
oec_algorithm == kInvalidAlgorithm) {
|
|
return INVALID_PARAMETERS_ENG_14;
|
|
}
|
|
|
|
if (out_buffer->size() < in_buffer.size()) {
|
|
out_buffer->resize(in_buffer.size());
|
|
}
|
|
|
|
// TODO(jfore): We need to select a key with a cipher mode and algorithm
|
|
// doesn't seem to fit. Is it ok to just use a default value here?
|
|
// Or do we need to pass it in?
|
|
CdmResponseType result = SelectKey(key_id, kCipherModeCbc);
|
|
if (result != NO_ERROR) return result;
|
|
|
|
OEMCryptoResult sts;
|
|
|
|
WithOecSessionLock("GenericDecrypt", [&] {
|
|
M_TIME(
|
|
sts = OEMCrypto_Generic_Decrypt(
|
|
oec_session_id_, reinterpret_cast<const uint8_t*>(in_buffer.data()),
|
|
in_buffer.size(), reinterpret_cast<const uint8_t*>(iv.data()),
|
|
oec_algorithm,
|
|
reinterpret_cast<uint8_t*>(const_cast<char*>(out_buffer->data()))),
|
|
metrics_, oemcrypto_generic_decrypt_, sts,
|
|
metrics::Pow2Bucket(in_buffer.size()));
|
|
});
|
|
|
|
if (OEMCrypto_SUCCESS != sts) {
|
|
LOGE("OEMCrypto_Generic_Decrypt failed: status = %d",
|
|
static_cast<int>(sts));
|
|
}
|
|
|
|
switch (sts) {
|
|
case OEMCrypto_SUCCESS:
|
|
return NO_ERROR;
|
|
case OEMCrypto_ERROR_KEY_EXPIRED:
|
|
return NEED_KEY;
|
|
case OEMCrypto_ERROR_NO_CONTENT_KEY:
|
|
case OEMCrypto_KEY_NOT_LOADED: // obsolete in v15.
|
|
return KEY_NOT_FOUND_4;
|
|
case OEMCrypto_ERROR_OUTPUT_TOO_LARGE:
|
|
return OUTPUT_TOO_LARGE_ERROR;
|
|
case OEMCrypto_ERROR_SESSION_LOST_STATE:
|
|
return SESSION_LOST_STATE_ERROR;
|
|
case OEMCrypto_ERROR_SYSTEM_INVALIDATED:
|
|
return SYSTEM_INVALIDATED_ERROR;
|
|
default:
|
|
return UNKNOWN_ERROR;
|
|
}
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GenericSign(const std::string& message,
|
|
const std::string& key_id,
|
|
CdmSigningAlgorithm algorithm,
|
|
std::string* signature) {
|
|
LOGV("Generic sign: id = %u", oec_session_id_);
|
|
RETURN_IF_NULL(signature, PARAMETER_NULL);
|
|
|
|
OEMCrypto_Algorithm oec_algorithm = GenericSigningAlgorithm(algorithm);
|
|
if (oec_algorithm == kInvalidAlgorithm) {
|
|
return INVALID_PARAMETERS_ENG_15;
|
|
}
|
|
|
|
OEMCryptoResult sts;
|
|
size_t length = signature->size();
|
|
|
|
// TODO(jfore): We need to select a key with a cipher mode and algorithm
|
|
// doesn't seem to fit. Is it ok to just use a default value here?
|
|
// Or do we need to pass it in?
|
|
CdmResponseType result = SelectKey(key_id, kCipherModeCbc);
|
|
if (result != NO_ERROR) return result;
|
|
|
|
// At most two attempts.
|
|
// The first attempt may fail due to buffer too short
|
|
for (int i = 0; i < 2; ++i) {
|
|
WithOecSessionLock("GenericSign", [&] {
|
|
M_TIME(
|
|
sts = OEMCrypto_Generic_Sign(
|
|
oec_session_id_, reinterpret_cast<const uint8_t*>(message.data()),
|
|
message.size(), oec_algorithm,
|
|
reinterpret_cast<uint8_t*>(const_cast<char*>(signature->data())),
|
|
&length),
|
|
metrics_, oemcrypto_generic_sign_, sts,
|
|
metrics::Pow2Bucket(message.size()));
|
|
});
|
|
|
|
if (OEMCrypto_SUCCESS == sts) {
|
|
// Trim signature buffer and done
|
|
signature->resize(length);
|
|
return NO_ERROR;
|
|
}
|
|
if (OEMCrypto_ERROR_SHORT_BUFFER != sts) {
|
|
break;
|
|
}
|
|
|
|
// Retry with proper-sized return buffer
|
|
signature->resize(length);
|
|
}
|
|
|
|
LOGE("OEMCrypto_Generic_Sign failed: status = %d", static_cast<int>(sts));
|
|
|
|
switch (sts) {
|
|
case OEMCrypto_ERROR_KEY_EXPIRED:
|
|
return NEED_KEY;
|
|
case OEMCrypto_ERROR_NO_CONTENT_KEY:
|
|
case OEMCrypto_KEY_NOT_LOADED: // obsolete in v15.
|
|
return KEY_NOT_FOUND_5;
|
|
case OEMCrypto_ERROR_OUTPUT_TOO_LARGE:
|
|
return OUTPUT_TOO_LARGE_ERROR;
|
|
case OEMCrypto_ERROR_SESSION_LOST_STATE:
|
|
return SESSION_LOST_STATE_ERROR;
|
|
case OEMCrypto_ERROR_SYSTEM_INVALIDATED:
|
|
return SYSTEM_INVALIDATED_ERROR;
|
|
default:
|
|
return UNKNOWN_ERROR;
|
|
}
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GenericVerify(const std::string& message,
|
|
const std::string& key_id,
|
|
CdmSigningAlgorithm algorithm,
|
|
const std::string& signature) {
|
|
LOGV("Generic verify: id = %u", oec_session_id_);
|
|
|
|
OEMCrypto_Algorithm oec_algorithm = GenericSigningAlgorithm(algorithm);
|
|
if (oec_algorithm == kInvalidAlgorithm) {
|
|
return INVALID_PARAMETERS_ENG_16;
|
|
}
|
|
|
|
// TODO(jfore): We need to select a key with a cipher mode and algorithm
|
|
// doesn't seem to fit. Is it ok to just use a default value here?
|
|
// Or do we need to pass it in?
|
|
CdmResponseType result = SelectKey(key_id, kCipherModeCbc);
|
|
if (result != NO_ERROR) return result;
|
|
|
|
OEMCryptoResult sts;
|
|
WithOecSessionLock("GenericVerify", [&] {
|
|
M_TIME(
|
|
sts = OEMCrypto_Generic_Verify(
|
|
oec_session_id_, reinterpret_cast<const uint8_t*>(message.data()),
|
|
message.size(), oec_algorithm,
|
|
reinterpret_cast<const uint8_t*>(signature.data()),
|
|
signature.size()),
|
|
metrics_, oemcrypto_generic_verify_, sts,
|
|
metrics::Pow2Bucket(signature.size()));
|
|
});
|
|
|
|
if (OEMCrypto_SUCCESS != sts) {
|
|
LOGE("OEMCrypto_Generic_Verify failed: status = %d", static_cast<int>(sts));
|
|
}
|
|
|
|
switch (sts) {
|
|
case OEMCrypto_SUCCESS:
|
|
return NO_ERROR;
|
|
case OEMCrypto_ERROR_KEY_EXPIRED:
|
|
return NEED_KEY;
|
|
case OEMCrypto_ERROR_NO_CONTENT_KEY:
|
|
case OEMCrypto_KEY_NOT_LOADED: // obsolete in v15.
|
|
return KEY_NOT_FOUND_6;
|
|
case OEMCrypto_ERROR_OUTPUT_TOO_LARGE:
|
|
return OUTPUT_TOO_LARGE_ERROR;
|
|
case OEMCrypto_ERROR_SESSION_LOST_STATE:
|
|
return SESSION_LOST_STATE_ERROR;
|
|
case OEMCrypto_ERROR_SYSTEM_INVALIDATED:
|
|
return SYSTEM_INVALIDATED_ERROR;
|
|
default:
|
|
return UNKNOWN_ERROR;
|
|
}
|
|
}
|
|
|
|
CdmResponseType CryptoSession::GetUsageSupportType(
|
|
CdmUsageSupportType* usage_support_type) {
|
|
LOGV("Getting usage support type: id = %u", oec_session_id_);
|
|
|
|
RETURN_IF_NULL(usage_support_type, PARAMETER_NULL);
|
|
|
|
if (usage_support_type_ != kUnknownUsageSupport) {
|
|
*usage_support_type = usage_support_type_;
|
|
return NO_ERROR;
|
|
}
|
|
|
|
bool has_support = false;
|
|
if (!UsageInformationSupport(&has_support)) {
|
|
LOGE("UsageInformationSupport failed");
|
|
return USAGE_INFORMATION_SUPPORT_FAILED;
|
|
}
|
|
|
|
if (!has_support) {
|
|
*usage_support_type = usage_support_type_ = kNonSecureUsageSupport;
|
|
} else {
|
|
// As of v16, all supported version of OEMCrypto provide usage entry
|
|
// support or no usage info support.
|
|
*usage_support_type = usage_support_type_ = kUsageEntrySupport;
|
|
}
|
|
return NO_ERROR;
|
|
}
|
|
|
|
CdmResponseType CryptoSession::CreateUsageTableHeader(
|
|
SecurityLevel requested_security_level,
|
|
CdmUsageTableHeader* usage_table_header) {
|
|
LOGV("Creating usage table header: requested_security_level = %s",
|
|
requested_security_level == kLevel3
|
|
? QUERY_VALUE_SECURITY_LEVEL_L3.c_str()
|
|
: QUERY_VALUE_SECURITY_LEVEL_DEFAULT.c_str());
|
|
RETURN_IF_NULL(usage_table_header, PARAMETER_NULL);
|
|
|
|
usage_table_header->resize(kEstimatedInitialUsageTableHeader);
|
|
size_t usage_table_header_size = usage_table_header->size();
|
|
OEMCryptoResult result;
|
|
WithOecWriteLock("CreateUsageTableHeader Attempt 1", [&] {
|
|
result = OEMCrypto_CreateUsageTableHeader(
|
|
requested_security_level,
|
|
reinterpret_cast<uint8_t*>(
|
|
const_cast<char*>(usage_table_header->data())),
|
|
&usage_table_header_size);
|
|
metrics_->oemcrypto_create_usage_table_header_.Increment(result);
|
|
});
|
|
|
|
if (result == OEMCrypto_ERROR_SHORT_BUFFER) {
|
|
usage_table_header->resize(usage_table_header_size);
|
|
WithOecWriteLock("CreateUsageTableHeader Attempt 2", [&] {
|
|
result = OEMCrypto_CreateUsageTableHeader(
|
|
requested_security_level,
|
|
reinterpret_cast<uint8_t*>(
|
|
const_cast<char*>(usage_table_header->data())),
|
|
&usage_table_header_size);
|
|
metrics_->oemcrypto_create_usage_table_header_.Increment(result);
|
|
});
|
|
}
|
|
|
|
switch (result) {
|
|
case OEMCrypto_SUCCESS:
|
|
usage_table_header->resize(usage_table_header_size);
|
|
return NO_ERROR;
|
|
default:
|
|
return MapOEMCryptoResult(result, CREATE_USAGE_TABLE_ERROR,
|
|
"CreateUsageTableHeader");
|
|
}
|
|
}
|
|
|
|
CdmResponseType CryptoSession::LoadUsageTableHeader(
|
|
SecurityLevel requested_security_level,
|
|
const CdmUsageTableHeader& usage_table_header) {
|
|
LOGV("Loading usage table header: requested_security_level = %s",
|
|
requested_security_level == kLevel3
|
|
? QUERY_VALUE_SECURITY_LEVEL_L3.c_str()
|
|
: QUERY_VALUE_SECURITY_LEVEL_DEFAULT.c_str());
|
|
|
|
OEMCryptoResult result;
|
|
WithOecWriteLock("LoadUsageTableHeader", [&] {
|
|
result = OEMCrypto_LoadUsageTableHeader(
|
|
requested_security_level,
|
|
reinterpret_cast<const uint8_t*>(usage_table_header.data()),
|
|
usage_table_header.size());
|
|
metrics_->oemcrypto_load_usage_table_header_.Increment(result);
|
|
});
|
|
|
|
if (result != OEMCrypto_SUCCESS) {
|
|
if (result == OEMCrypto_WARNING_GENERATION_SKEW) {
|
|
LOGW("OEMCrypto_LoadUsageTableHeader warning: generation skew");
|
|
} else {
|
|
LOGE("OEMCrypto_LoadUsageTableHeader failed: status = %d",
|
|
static_cast<int>(result));
|
|
}
|
|
}
|
|
|
|
switch (result) {
|
|
case OEMCrypto_SUCCESS:
|
|
case OEMCrypto_WARNING_GENERATION_SKEW:
|
|
return NO_ERROR;
|
|
case OEMCrypto_ERROR_GENERATION_SKEW:
|
|
return LOAD_USAGE_HEADER_GENERATION_SKEW;
|
|
case OEMCrypto_ERROR_SIGNATURE_FAILURE:
|
|
return LOAD_USAGE_HEADER_SIGNATURE_FAILURE;
|
|
case OEMCrypto_ERROR_BAD_MAGIC:
|
|
return LOAD_USAGE_HEADER_BAD_MAGIC;
|
|
case OEMCrypto_ERROR_SYSTEM_INVALIDATED:
|
|
return SYSTEM_INVALIDATED_ERROR;
|
|
case OEMCrypto_ERROR_UNKNOWN_FAILURE:
|
|
default:
|
|
return LOAD_USAGE_HEADER_UNKNOWN_ERROR;
|
|
}
|
|
}
|
|
|
|
CdmResponseType CryptoSession::ShrinkUsageTableHeader(
|
|
SecurityLevel requested_security_level, uint32_t new_entry_count,
|
|
CdmUsageTableHeader* usage_table_header) {
|
|
LOGV("Shrinking usage table header: requested_security_level = %s",
|
|
requested_security_level == kLevel3
|
|
? QUERY_VALUE_SECURITY_LEVEL_L3.c_str()
|
|
: QUERY_VALUE_SECURITY_LEVEL_DEFAULT.c_str());
|
|
RETURN_IF_NULL(usage_table_header, PARAMETER_NULL);
|
|
|
|
size_t usage_table_header_len = 0;
|
|
OEMCryptoResult result;
|
|
WithOecWriteLock("ShrinkUsageTableHeader Attempt 1", [&] {
|
|
result = OEMCrypto_ShrinkUsageTableHeader(requested_security_level,
|
|
new_entry_count, nullptr,
|
|
&usage_table_header_len);
|
|
metrics_->oemcrypto_shrink_usage_table_header_.Increment(result);
|
|
});
|
|
|
|
if (result == OEMCrypto_ERROR_SHORT_BUFFER) {
|
|
usage_table_header->resize(usage_table_header_len);
|
|
WithOecWriteLock("ShrinkUsageTableHeader Attempt 2", [&] {
|
|
result = OEMCrypto_ShrinkUsageTableHeader(
|
|
requested_security_level, new_entry_count,
|
|
reinterpret_cast<uint8_t*>(
|
|
const_cast<char*>(usage_table_header->data())),
|
|
&usage_table_header_len);
|
|
metrics_->oemcrypto_shrink_usage_table_header_.Increment(result);
|
|
});
|
|
}
|
|
|
|
switch (result) {
|
|
case OEMCrypto_SUCCESS:
|
|
usage_table_header->resize(usage_table_header_len);
|
|
return NO_ERROR;
|
|
case OEMCrypto_ERROR_ENTRY_IN_USE:
|
|
return SHRINK_USAGE_TABLE_HEADER_ENTRY_IN_USE;
|
|
default:
|
|
return MapOEMCryptoResult(result, SHRINK_USAGE_TABLE_HEADER_UNKNOWN_ERROR,
|
|
"ShrinkUsageTableHeader");
|
|
}
|
|
}
|
|
|
|
CdmResponseType CryptoSession::CreateUsageEntry(uint32_t* entry_number) {
|
|
LOGV("Creating usage entry: id = %u", oec_session_id_);
|
|
|
|
RETURN_IF_NULL(entry_number, PARAMETER_NULL);
|
|
|
|
OEMCryptoResult result;
|
|
WithOecWriteLock("CreateUsageEntry", [&] {
|
|
result = OEMCrypto_CreateNewUsageEntry(oec_session_id_, entry_number);
|
|
metrics_->oemcrypto_create_new_usage_entry_.Increment(result);
|
|
});
|
|
|
|
if (result != OEMCrypto_SUCCESS) {
|
|
LOGE("OEMCrypto_CreateNewUsageEntry failed: status = %d",
|
|
static_cast<int>(result));
|
|
}
|
|
|
|
switch (result) {
|
|
case OEMCrypto_SUCCESS:
|
|
return NO_ERROR;
|
|
case OEMCrypto_ERROR_INSUFFICIENT_RESOURCES:
|
|
return INSUFFICIENT_CRYPTO_RESOURCES_3;
|
|
case OEMCrypto_ERROR_SESSION_LOST_STATE:
|
|
return SESSION_LOST_STATE_ERROR;
|
|
case OEMCrypto_ERROR_SYSTEM_INVALIDATED:
|
|
return SYSTEM_INVALIDATED_ERROR;
|
|
default:
|
|
return CREATE_USAGE_ENTRY_UNKNOWN_ERROR;
|
|
}
|
|
}
|
|
|
|
CdmResponseType CryptoSession::LoadUsageEntry(
|
|
uint32_t entry_number, const CdmUsageEntry& usage_entry) {
|
|
LOGV("Loading usage entry: id = %u", oec_session_id_);
|
|
|
|
OEMCryptoResult result;
|
|
WithOecWriteLock("LoadUsageEntry", [&] {
|
|
result = OEMCrypto_LoadUsageEntry(
|
|
oec_session_id_, entry_number,
|
|
reinterpret_cast<const uint8_t*>(usage_entry.data()),
|
|
usage_entry.size());
|
|
metrics_->oemcrypto_load_usage_entry_.Increment(result);
|
|
});
|
|
|
|
if (result != OEMCrypto_SUCCESS) {
|
|
if (result == OEMCrypto_WARNING_GENERATION_SKEW) {
|
|
LOGW("OEMCrypto_LoadUsageEntry warning: generation skew");
|
|
} else {
|
|
LOGE("OEMCrypto_LoadUsageEntry failed: status = %d",
|
|
static_cast<int>(result));
|
|
}
|
|
}
|
|
|
|
switch (result) {
|
|
case OEMCrypto_SUCCESS:
|
|
case OEMCrypto_WARNING_GENERATION_SKEW:
|
|
return NO_ERROR;
|
|
case OEMCrypto_ERROR_INVALID_SESSION:
|
|
// This case is special, as it could imply that the provided
|
|
// session ID is invalid (CDM internal bug), or that the entry
|
|
// being loaded is already in use in a different session.
|
|
// It is up to the caller to handle this.
|
|
return LOAD_USAGE_ENTRY_INVALID_SESSION;
|
|
case OEMCrypto_ERROR_GENERATION_SKEW:
|
|
return LOAD_USAGE_ENTRY_GENERATION_SKEW;
|
|
case OEMCrypto_ERROR_SIGNATURE_FAILURE:
|
|
return LOAD_USAGE_ENTRY_SIGNATURE_FAILURE;
|
|
default:
|
|
return MapOEMCryptoResult(result, LOAD_USAGE_ENTRY_UNKNOWN_ERROR,
|
|
"LoadUsageEntry");
|
|
}
|
|
}
|
|
|
|
CdmResponseType CryptoSession::UpdateUsageEntry(
|
|
CdmUsageTableHeader* usage_table_header, CdmUsageEntry* usage_entry) {
|
|
LOGV("Updating usage entry: id = %u", oec_session_id_);
|
|
|
|
RETURN_IF_NULL(usage_table_header, PARAMETER_NULL);
|
|
RETURN_IF_NULL(usage_entry, PARAMETER_NULL);
|
|
|
|
size_t usage_table_header_len = 0;
|
|
size_t usage_entry_len = 0;
|
|
OEMCryptoResult result;
|
|
WithOecWriteLock("UpdateUsageEntry Attempt 1", [&] {
|
|
result = OEMCrypto_UpdateUsageEntry(oec_session_id_, nullptr,
|
|
&usage_table_header_len, nullptr,
|
|
&usage_entry_len);
|
|
});
|
|
metrics_->oemcrypto_update_usage_entry_.Increment(result);
|
|
|
|
if (result == OEMCrypto_ERROR_SHORT_BUFFER) {
|
|
usage_table_header->resize(usage_table_header_len);
|
|
usage_entry->resize(usage_entry_len);
|
|
|
|
WithOecWriteLock("UpdateUsageEntry Attempt 2", [&] {
|
|
result = OEMCrypto_UpdateUsageEntry(
|
|
oec_session_id_,
|
|
reinterpret_cast<uint8_t*>(
|
|
const_cast<char*>(usage_table_header->data())),
|
|
&usage_table_header_len,
|
|
reinterpret_cast<uint8_t*>(const_cast<char*>(usage_entry->data())),
|
|
&usage_entry_len);
|
|
});
|
|
metrics_->oemcrypto_update_usage_entry_.Increment(result);
|
|
}
|
|
|
|
if (result == OEMCrypto_SUCCESS) {
|
|
usage_table_header->resize(usage_table_header_len);
|
|
usage_entry->resize(usage_entry_len);
|
|
}
|
|
|
|
return MapOEMCryptoResult(result, UPDATE_USAGE_ENTRY_UNKNOWN_ERROR,
|
|
"UpdateUsageEntry");
|
|
}
|
|
|
|
CdmResponseType CryptoSession::MoveUsageEntry(uint32_t new_entry_number) {
|
|
LOGV("Moving usage entry: id = %u", oec_session_id_);
|
|
|
|
OEMCryptoResult result;
|
|
WithOecWriteLock("MoveUsageEntry", [&] {
|
|
result = OEMCrypto_MoveEntry(oec_session_id_, new_entry_number);
|
|
metrics_->oemcrypto_move_entry_.Increment(result);
|
|
});
|
|
|
|
switch (result) {
|
|
case OEMCrypto_ERROR_ENTRY_IN_USE:
|
|
LOGW("OEMCrypto_MoveEntry failed: Destination index in use: index = %u",
|
|
new_entry_number);
|
|
return MOVE_USAGE_ENTRY_DESTINATION_IN_USE;
|
|
default:
|
|
return MapOEMCryptoResult(result, MOVE_USAGE_ENTRY_UNKNOWN_ERROR,
|
|
"MoveUsageEntry");
|
|
}
|
|
}
|
|
|
|
bool CryptoSession::GetAnalogOutputCapabilities(bool* can_support_output,
|
|
bool* can_disable_output,
|
|
bool* can_support_cgms_a) {
|
|
LOGV("Getting analog output capabilities: id = %u", oec_session_id_);
|
|
uint32_t flags;
|
|
WithOecReadLock("GetAnalogOutputCapabilities", [&] {
|
|
flags = OEMCrypto_GetAnalogOutputFlags(requested_security_level_);
|
|
});
|
|
|
|
if ((flags & OEMCrypto_Unknown_Analog_Output) != 0) return false;
|
|
*can_support_cgms_a = flags & OEMCrypto_Supports_CGMS_A;
|
|
*can_support_output = flags & OEMCrypto_Supports_Analog_Output;
|
|
*can_disable_output = flags & OEMCrypto_Can_Disable_Analog_Ouptput;
|
|
return true;
|
|
}
|
|
|
|
OEMCrypto_Algorithm CryptoSession::GenericSigningAlgorithm(
|
|
CdmSigningAlgorithm algorithm) {
|
|
if (kSigningAlgorithmHmacSha256 == algorithm) {
|
|
return OEMCrypto_HMAC_SHA256;
|
|
} else {
|
|
return kInvalidAlgorithm;
|
|
}
|
|
}
|
|
|
|
OEMCrypto_Algorithm CryptoSession::GenericEncryptionAlgorithm(
|
|
CdmEncryptionAlgorithm algorithm) {
|
|
if (kEncryptionAlgorithmAesCbc128 == algorithm) {
|
|
return OEMCrypto_AES_CBC_128_NO_PADDING;
|
|
} else {
|
|
return kInvalidAlgorithm;
|
|
}
|
|
}
|
|
|
|
size_t CryptoSession::GenericEncryptionBlockSize(
|
|
CdmEncryptionAlgorithm algorithm) {
|
|
if (kEncryptionAlgorithmAesCbc128 == algorithm) {
|
|
return kAes128BlockSize;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
// OEMCryptoResult OEMCrypto_DecryptCENC(
|
|
// OEMCrypto_SESSION session,
|
|
// const OEMCrypto_SampleDescription* samples, // an array of samples.
|
|
// size_t samples_length, // the number of samples.
|
|
// const OEMCrypto_CENCEncryptPatternDesc* pattern);
|
|
|
|
OEMCryptoResult CryptoSession::DecryptMultipleSamples(
|
|
const std::vector<OEMCrypto_SampleDescription>& samples,
|
|
CdmCipherMode cipher_mode,
|
|
const OEMCrypto_CENCEncryptPatternDesc& pattern) {
|
|
OEMCryptoResult sts = OEMCrypto_ERROR_BUFFER_TOO_LARGE;
|
|
|
|
// If there's only one sample, automatically fall through to avoid a redundant
|
|
// roundtrip through OEMCrypto_DecryptCENC()
|
|
if (samples.size() > 1) {
|
|
WithOecSessionLock("DecryptMultipleSamples", [&] {
|
|
sts = key_session_->Decrypt(samples.data(), samples.size(), pattern);
|
|
});
|
|
}
|
|
|
|
if (sts == OEMCrypto_ERROR_BUFFER_TOO_LARGE) {
|
|
// Fall back to sending each sample individually
|
|
for (const OEMCrypto_SampleDescription& sample : samples) {
|
|
sts = DecryptSample(sample, cipher_mode, pattern);
|
|
if (sts != OEMCrypto_SUCCESS) break;
|
|
}
|
|
}
|
|
|
|
return sts;
|
|
}
|
|
|
|
OEMCryptoResult CryptoSession::DecryptSample(
|
|
const OEMCrypto_SampleDescription& sample, CdmCipherMode cipher_mode,
|
|
const OEMCrypto_CENCEncryptPatternDesc& pattern) {
|
|
OEMCryptoResult sts = OEMCrypto_ERROR_BUFFER_TOO_LARGE;
|
|
|
|
// If there's only one subsample and it contains only one type of region,
|
|
// automatically fall through to avoid a redundant roundtrip through
|
|
// OEMCrypto_DecryptCENC()
|
|
if (sample.subsamples_length > 1 ||
|
|
(sample.subsamples[0].num_bytes_clear > 0 &&
|
|
sample.subsamples[0].num_bytes_encrypted > 0)) {
|
|
WithOecSessionLock("DecryptSample", [&] {
|
|
sts = key_session_->Decrypt(&sample, 1, pattern);
|
|
});
|
|
}
|
|
|
|
if (sts == OEMCrypto_ERROR_BUFFER_TOO_LARGE) {
|
|
// Fall back to sending each subsample region individually
|
|
sts = OEMCrypto_SUCCESS;
|
|
OEMCrypto_SampleDescription fake_sample = sample;
|
|
for (size_t i = 0; i < sample.subsamples_length; ++i) {
|
|
const OEMCrypto_SubSampleDescription& original_subsample =
|
|
sample.subsamples[i];
|
|
|
|
if (original_subsample.num_bytes_clear > 0) {
|
|
const size_t length = original_subsample.num_bytes_clear;
|
|
OEMCrypto_SubSampleDescription clear_subsample{
|
|
length,
|
|
0, // num_bytes_encrypted
|
|
0, // subsample_flags
|
|
0 // block_offset, not relevant for clear data
|
|
};
|
|
if (original_subsample.subsample_flags & OEMCrypto_FirstSubsample) {
|
|
clear_subsample.subsample_flags |= OEMCrypto_FirstSubsample;
|
|
}
|
|
if ((original_subsample.subsample_flags & OEMCrypto_LastSubsample) &&
|
|
original_subsample.num_bytes_encrypted == 0) {
|
|
clear_subsample.subsample_flags |= OEMCrypto_LastSubsample;
|
|
}
|
|
|
|
fake_sample.buffers.input_data_length = length;
|
|
fake_sample.subsamples = &clear_subsample;
|
|
fake_sample.subsamples_length = 1;
|
|
|
|
sts = LegacyDecrypt(fake_sample, cipher_mode, pattern);
|
|
if (sts != OEMCrypto_SUCCESS) break;
|
|
|
|
fake_sample.buffers.input_data += length;
|
|
AdvanceDestBuffer(&fake_sample.buffers.output_descriptor, length);
|
|
}
|
|
|
|
if (original_subsample.num_bytes_encrypted > 0) {
|
|
const size_t length = original_subsample.num_bytes_encrypted;
|
|
OEMCrypto_SubSampleDescription encrypted_subsample{
|
|
0, // num_bytes_clear
|
|
length,
|
|
0, // subsample_flags
|
|
original_subsample.block_offset};
|
|
if ((original_subsample.subsample_flags & OEMCrypto_FirstSubsample) &&
|
|
original_subsample.num_bytes_clear == 0) {
|
|
encrypted_subsample.subsample_flags |= OEMCrypto_FirstSubsample;
|
|
}
|
|
if (original_subsample.subsample_flags & OEMCrypto_LastSubsample) {
|
|
encrypted_subsample.subsample_flags |= OEMCrypto_LastSubsample;
|
|
}
|
|
|
|
fake_sample.buffers.input_data_length = length;
|
|
fake_sample.subsamples = &encrypted_subsample;
|
|
fake_sample.subsamples_length = 1;
|
|
|
|
sts = LegacyDecrypt(fake_sample, cipher_mode, pattern);
|
|
if (sts != OEMCrypto_SUCCESS) break;
|
|
|
|
fake_sample.buffers.input_data += length;
|
|
AdvanceDestBuffer(&fake_sample.buffers.output_descriptor, length);
|
|
if (cipher_mode == kCipherModeCtr) {
|
|
AdvanceIvCtr(&fake_sample.iv,
|
|
original_subsample.block_offset +
|
|
original_subsample.num_bytes_encrypted);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return sts;
|
|
}
|
|
|
|
OEMCryptoResult CryptoSession::LegacyDecrypt(
|
|
const OEMCrypto_SampleDescription& sample, CdmCipherMode cipher_mode,
|
|
const OEMCrypto_CENCEncryptPatternDesc& pattern) {
|
|
const size_t max_chunk_size = GetMaxSubsampleRegionSize();
|
|
OEMCryptoResult sts = OEMCrypto_ERROR_NOT_IMPLEMENTED;
|
|
|
|
// We can be sure this is only called with one subsample containing one
|
|
// region of data.
|
|
const OEMCrypto_SubSampleDescription& subsample = sample.subsamples[0];
|
|
const bool is_encrypted = (subsample.num_bytes_encrypted > 0);
|
|
const bool is_only_subsample =
|
|
subsample.subsample_flags ==
|
|
(OEMCrypto_FirstSubsample | OEMCrypto_LastSubsample);
|
|
if (!is_encrypted && is_only_subsample) {
|
|
WithOecSessionLock("LegacyDecrypt() calling CopyBuffer", [&] {
|
|
M_TIME(sts = OEMCrypto_CopyBuffer(
|
|
oec_session_id_, sample.buffers.input_data,
|
|
sample.buffers.input_data_length,
|
|
&sample.buffers.output_descriptor, subsample.subsample_flags),
|
|
metrics_, oemcrypto_copy_buffer_, sts,
|
|
metrics::Pow2Bucket(sample.buffers.input_data_length));
|
|
});
|
|
|
|
if (sts == OEMCrypto_ERROR_BUFFER_TOO_LARGE &&
|
|
sample.buffers.input_data_length > max_chunk_size) {
|
|
// OEMCrypto_CopyBuffer rejected the buffer as too large, so chunk it up
|
|
// into 100 KiB sections.
|
|
sts = LegacyCopyBufferInChunks(sample, max_chunk_size);
|
|
}
|
|
}
|
|
if (is_encrypted || sts == OEMCrypto_ERROR_NOT_IMPLEMENTED) {
|
|
WithOecSessionLock("LegacyDecrypt() calling key_session_->Decrypt()", [&] {
|
|
sts = key_session_->Decrypt(&sample, 1, pattern);
|
|
});
|
|
|
|
if (sts == OEMCrypto_ERROR_BUFFER_TOO_LARGE) {
|
|
// OEMCrypto_DecryptCENC rejected the buffer as too large, so chunk it
|
|
// up into sections no more than 100 KiB. The exact chunk size needs to
|
|
// be an even number of pattern repetitions long or else the pattern
|
|
// will get out of sync.
|
|
const size_t pattern_length =
|
|
(pattern.encrypt + pattern.skip) * kAes128BlockSize;
|
|
const size_t chunk_size =
|
|
pattern_length > 0
|
|
? max_chunk_size - (max_chunk_size % pattern_length)
|
|
: max_chunk_size;
|
|
|
|
if (sample.buffers.input_data_length > chunk_size) {
|
|
sts = LegacyDecryptInChunks(sample, cipher_mode, pattern, chunk_size);
|
|
}
|
|
}
|
|
}
|
|
|
|
return sts;
|
|
}
|
|
|
|
OEMCryptoResult CryptoSession::LegacyCopyBufferInChunks(
|
|
const OEMCrypto_SampleDescription& sample, size_t max_chunk_size) {
|
|
const uint8_t* input_data = sample.buffers.input_data;
|
|
size_t remaining_input_data = sample.buffers.input_data_length;
|
|
OEMCrypto_DestBufferDesc output_descriptor = sample.buffers.output_descriptor;
|
|
uint8_t subsample_flags = OEMCrypto_FirstSubsample;
|
|
OEMCryptoResult sts = OEMCrypto_SUCCESS;
|
|
|
|
while (remaining_input_data > 0) {
|
|
// Calculate the size of the next chunk.
|
|
const size_t chunk_size = std::min(remaining_input_data, max_chunk_size);
|
|
|
|
// Re-add "last subsample" flag if this is the last subsample.
|
|
if (chunk_size == remaining_input_data) {
|
|
subsample_flags |= OEMCrypto_LastSubsample;
|
|
}
|
|
|
|
WithOecSessionLock("LegacyCopyBufferInChunks", [&] {
|
|
M_TIME(sts = OEMCrypto_CopyBuffer(oec_session_id_, input_data, chunk_size,
|
|
&output_descriptor, subsample_flags),
|
|
metrics_, oemcrypto_copy_buffer_, sts,
|
|
metrics::Pow2Bucket(chunk_size));
|
|
});
|
|
|
|
if (sts != OEMCrypto_SUCCESS) break;
|
|
|
|
// Clear any subsample flags before the next loop iteration.
|
|
subsample_flags = 0;
|
|
|
|
// Update the source and destination buffers based on the amount of data
|
|
// copied.
|
|
input_data += chunk_size;
|
|
remaining_input_data -= chunk_size;
|
|
AdvanceDestBuffer(&output_descriptor, chunk_size);
|
|
}
|
|
|
|
return sts;
|
|
}
|
|
|
|
OEMCryptoResult CryptoSession::LegacyDecryptInChunks(
|
|
const OEMCrypto_SampleDescription& sample, CdmCipherMode cipher_mode,
|
|
const OEMCrypto_CENCEncryptPatternDesc& pattern, size_t max_chunk_size) {
|
|
const OEMCrypto_SubSampleDescription& subsample = sample.subsamples[0];
|
|
|
|
const bool is_protected = (subsample.num_bytes_encrypted > 0);
|
|
OEMCrypto_SampleDescription fake_sample = sample;
|
|
OEMCrypto_SubSampleDescription fake_subsample = subsample;
|
|
fake_sample.subsamples = &fake_subsample;
|
|
fake_subsample.subsample_flags =
|
|
subsample.subsample_flags & OEMCrypto_FirstSubsample;
|
|
|
|
size_t remaining_input_data = sample.buffers.input_data_length;
|
|
OEMCryptoResult sts = OEMCrypto_SUCCESS;
|
|
|
|
while (remaining_input_data > 0) {
|
|
// Calculate the size of the next chunk.
|
|
const size_t chunk_size = std::min(remaining_input_data, max_chunk_size);
|
|
fake_sample.buffers.input_data_length = chunk_size;
|
|
if (is_protected) {
|
|
fake_subsample.num_bytes_encrypted = chunk_size;
|
|
} else {
|
|
fake_subsample.num_bytes_clear = chunk_size;
|
|
}
|
|
|
|
// Re-add "last subsample" flag if this is the last subsample.
|
|
if (chunk_size == remaining_input_data) {
|
|
fake_subsample.subsample_flags |=
|
|
subsample.subsample_flags & OEMCrypto_LastSubsample;
|
|
}
|
|
|
|
// |pattern| and |fake_subsample.block_offset| do not need to change because
|
|
// |max_chunk_size| is guaranteed to be an even multiple of the
|
|
// pattern length long, which is also guaranteed to be an exact number
|
|
// of AES blocks long.
|
|
WithOecSessionLock("LegacyDecryptInChunks", [&] {
|
|
sts = key_session_->Decrypt(&fake_sample, 1, pattern);
|
|
});
|
|
|
|
if (sts != OEMCrypto_SUCCESS) break;
|
|
|
|
// Clear any subsample flags before the next loop iteration.
|
|
fake_subsample.subsample_flags = 0;
|
|
|
|
// Update the IV so that it is valid for the next iteration. This should not
|
|
// be done on the last iteration both to save time and because the 'cbcs'
|
|
// calculation can underflow if the chunk is less than the max chunk size.
|
|
if (remaining_input_data > chunk_size) {
|
|
if (cipher_mode == kCipherModeCtr) {
|
|
// For 'cenc', update the IV depending on how many encrypted blocks
|
|
// we passed.
|
|
AdvanceIvCtr(&fake_sample.iv, chunk_size + fake_subsample.block_offset);
|
|
} else if (cipher_mode == kCipherModeCbc) {
|
|
// For 'cbcs', use the last ciphertext block as the next IV. The last
|
|
// block that was encrypted is probably not the last block of the
|
|
// subsample. Since the max buffer size is guaranteed to be an even
|
|
// number of pattern repetitions long, we can use the pattern to know
|
|
// how many blocks to look back.
|
|
const uint8_t* const buffer_end =
|
|
fake_sample.buffers.input_data + chunk_size;
|
|
const uint8_t* const block_end =
|
|
buffer_end - kAes128BlockSize * pattern.skip;
|
|
|
|
static_assert(sizeof(fake_sample.iv) == kAes128BlockSize,
|
|
"The size of an AES-128 block and the size of an AES-128 "
|
|
"IV have become misaligned.");
|
|
memcpy(fake_sample.iv, block_end - kAes128BlockSize, kAes128BlockSize);
|
|
}
|
|
}
|
|
|
|
// Update the source and destination buffers based on the amount of data
|
|
// copied.
|
|
fake_sample.buffers.input_data += chunk_size;
|
|
remaining_input_data -= chunk_size;
|
|
AdvanceDestBuffer(&fake_sample.buffers.output_descriptor, chunk_size);
|
|
}
|
|
|
|
return sts;
|
|
}
|
|
|
|
template <class Func>
|
|
auto CryptoSession::WithStaticFieldWriteLock(const char* tag, Func body)
|
|
-> decltype(body()) {
|
|
LOGV("Static field write lock: %s", tag);
|
|
std::unique_lock<shared_mutex> auto_lock(static_field_mutex_);
|
|
return body();
|
|
}
|
|
|
|
template <class Func>
|
|
auto CryptoSession::WithStaticFieldReadLock(const char* tag, Func body)
|
|
-> decltype(body()) {
|
|
LOGV("Static field read lock: %s", tag);
|
|
shared_lock<shared_mutex> auto_lock(static_field_mutex_);
|
|
return body();
|
|
}
|
|
|
|
template <class Func>
|
|
auto CryptoSession::WithOecWriteLock(const char* tag, Func body)
|
|
-> decltype(body()) {
|
|
LOGV("OEMCrypto write lock: %s", tag);
|
|
std::unique_lock<shared_mutex> auto_lock(oem_crypto_mutex_);
|
|
return body();
|
|
}
|
|
|
|
template <class Func>
|
|
auto CryptoSession::WithOecReadLock(const char* tag, Func body)
|
|
-> decltype(body()) {
|
|
LOGV("OEMCrypto read lock: %s", tag);
|
|
shared_lock<shared_mutex> auto_lock(oem_crypto_mutex_);
|
|
return body();
|
|
}
|
|
|
|
template <class Func>
|
|
auto CryptoSession::WithOecSessionLock(const char* tag, Func body)
|
|
-> decltype(body()) {
|
|
LOGV("OEMCrypto session lock: %s", tag);
|
|
shared_lock<shared_mutex> oec_auto_lock(oem_crypto_mutex_);
|
|
std::unique_lock<std::mutex> session_auto_lock(oem_crypto_session_mutex_);
|
|
return body();
|
|
}
|
|
|
|
bool CryptoSession::IsInitialized() {
|
|
return WithStaticFieldReadLock("IsInitialized", [] { return initialized_; });
|
|
}
|
|
|
|
// CryptoSesssionFactory support
|
|
std::mutex CryptoSession::factory_mutex_;
|
|
// The factory will either be set by WvCdmTestBase, or a default factory is
|
|
// created on the first call to MakeCryptoSession.
|
|
std::unique_ptr<CryptoSessionFactory> CryptoSession::factory_ =
|
|
std::unique_ptr<CryptoSessionFactory>();
|
|
|
|
CryptoSession* CryptoSession::MakeCryptoSession(
|
|
metrics::CryptoMetrics* crypto_metrics) {
|
|
std::unique_lock<std::mutex> auto_lock(factory_mutex_);
|
|
// If the factory_ has not been set, then use a default factory.
|
|
if (!factory_) factory_.reset(new CryptoSessionFactory());
|
|
return factory_->MakeCryptoSession(crypto_metrics);
|
|
}
|
|
|
|
CryptoSession* CryptoSessionFactory::MakeCryptoSession(
|
|
metrics::CryptoMetrics* crypto_metrics) {
|
|
return new CryptoSession(crypto_metrics);
|
|
}
|
|
|
|
} // namespace wvcdm
|