Manual Code Push
This update brings the partner repo in sync with the internal repo's commit 040460be8b9556a699a6cd3813c88ce710f68146.
This commit is contained in:
Aaron Vaage
133
oemcrypto/odk/src/core_message_deserialize.cpp
Normal file
133
oemcrypto/odk/src/core_message_deserialize.cpp
Normal file
@@ -0,0 +1,133 @@
|
||||
// Copyright 2019 Google LLC. All rights reserved. This file and proprietary
|
||||
// source code may only be used and distributed under the Widevine Master
|
||||
// License Agreement.
|
||||
|
||||
#include "core_message_deserialize.h"
|
||||
|
||||
#include <algorithm>
|
||||
#include <cstddef>
|
||||
#include <cstdint>
|
||||
#include <cstring>
|
||||
#include <string>
|
||||
|
||||
#include "odk_serialize.h"
|
||||
#include "odk_structs.h"
|
||||
#include "odk_structs_priv.h"
|
||||
#include "serialization_base.h"
|
||||
|
||||
namespace oemcrypto_core_message {
|
||||
namespace deserialize {
|
||||
namespace {
|
||||
|
||||
/**
|
||||
* Template for parsing requests
|
||||
*
|
||||
* Template arguments:
|
||||
* S: kdo output struct
|
||||
* T: struct serialized by odk
|
||||
* U: auto-generated deserializing function for |T|
|
||||
*/
|
||||
template <typename S, typename T, typename U>
|
||||
bool ParseRequest(uint32_t message_type,
|
||||
const std::string& oemcrypto_core_message, S* core_request,
|
||||
T* prepared, const U unpacker) {
|
||||
if (core_request == nullptr || prepared == nullptr) {
|
||||
return false;
|
||||
}
|
||||
|
||||
const uint8_t* buf =
|
||||
reinterpret_cast<const uint8_t*>(oemcrypto_core_message.c_str());
|
||||
const size_t buf_length = oemcrypto_core_message.size();
|
||||
|
||||
Message* msg = nullptr;
|
||||
AllocateMessage(&msg, message_block);
|
||||
InitMessage(msg, const_cast<uint8_t*>(buf), buf_length);
|
||||
SetSize(msg, buf_length);
|
||||
|
||||
unpacker(msg, prepared);
|
||||
if (!ValidMessage(msg)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
const auto& core_message = prepared->core_message;
|
||||
core_request->api_major_version = core_message.nonce_values.api_major_version;
|
||||
core_request->api_minor_version = core_message.nonce_values.api_minor_version;
|
||||
core_request->nonce = core_message.nonce_values.nonce;
|
||||
core_request->session_id = core_message.nonce_values.session_id;
|
||||
// Verify that the minor version matches the released version for the given
|
||||
// major version.
|
||||
if (core_request->api_major_version < ODK_FIRST_VERSION) {
|
||||
// Non existing versions are not supported.
|
||||
return false;
|
||||
} else if (core_request->api_major_version == 16) {
|
||||
// For version 16, we demand a minor version of at least 2.
|
||||
// We accept 16.2, 16.3, or higher.
|
||||
if (core_request->api_major_version < 2) return false;
|
||||
} else {
|
||||
// Other versions do not (yet) have a restriction on minor number.
|
||||
// In particular, future versions are accepted for forward compatibility.
|
||||
}
|
||||
// For v16, a release and a renewal use the same message structure.
|
||||
// However, for future API versions, the release might be a separate
|
||||
// message. Otherwise, we expect an exact match of message types.
|
||||
if (core_message.message_type != message_type &&
|
||||
!(message_type == ODK_Renewal_Request_Type &&
|
||||
core_message.message_type == ODK_Release_Request_Type)) {
|
||||
return false;
|
||||
}
|
||||
// Verify that the amount of buffer we read, which is GetOffset, is not more
|
||||
// than the total message size. We allow the total message size to be larger
|
||||
// for forward compatibility because future messages might have extra fields
|
||||
// that we can ignore.
|
||||
if (core_message.message_length < GetOffset(msg)) return false;
|
||||
return true;
|
||||
}
|
||||
|
||||
} // namespace
|
||||
|
||||
bool CoreLicenseRequestFromMessage(const std::string& oemcrypto_core_message,
|
||||
ODK_LicenseRequest* core_license_request) {
|
||||
const auto unpacker = Unpack_ODK_PreparedLicenseRequest;
|
||||
ODK_PreparedLicenseRequest prepared_license = {};
|
||||
return ParseRequest(ODK_License_Request_Type, oemcrypto_core_message,
|
||||
core_license_request, &prepared_license, unpacker);
|
||||
}
|
||||
|
||||
bool CoreRenewalRequestFromMessage(const std::string& oemcrypto_core_message,
|
||||
ODK_RenewalRequest* core_renewal_request) {
|
||||
const auto unpacker = Unpack_ODK_PreparedRenewalRequest;
|
||||
ODK_PreparedRenewalRequest prepared_renewal = {};
|
||||
if (!ParseRequest(ODK_Renewal_Request_Type, oemcrypto_core_message,
|
||||
core_renewal_request, &prepared_renewal, unpacker)) {
|
||||
return false;
|
||||
}
|
||||
core_renewal_request->playback_time_seconds = prepared_renewal.playback_time;
|
||||
return true;
|
||||
}
|
||||
|
||||
bool CoreProvisioningRequestFromMessage(
|
||||
const std::string& oemcrypto_core_message,
|
||||
ODK_ProvisioningRequest* core_provisioning_request) {
|
||||
const auto unpacker = Unpack_ODK_PreparedProvisioningRequest;
|
||||
ODK_PreparedProvisioningRequest prepared_provision = {};
|
||||
if (!ParseRequest(ODK_Provisioning_Request_Type, oemcrypto_core_message,
|
||||
core_provisioning_request, &prepared_provision, unpacker)) {
|
||||
return false;
|
||||
}
|
||||
const uint8_t* device_id = prepared_provision.device_id;
|
||||
const uint32_t device_id_length = prepared_provision.device_id_length;
|
||||
if (device_id_length > ODK_DEVICE_ID_LEN_MAX) {
|
||||
return false;
|
||||
}
|
||||
uint8_t zero[ODK_DEVICE_ID_LEN_MAX] = {};
|
||||
if (memcmp(zero, device_id + device_id_length,
|
||||
ODK_DEVICE_ID_LEN_MAX - device_id_length)) {
|
||||
return false;
|
||||
}
|
||||
core_provisioning_request->device_id.assign(
|
||||
reinterpret_cast<const char*>(device_id), device_id_length);
|
||||
return true;
|
||||
}
|
||||
|
||||
} // namespace deserialize
|
||||
} // namespace oemcrypto_core_message
|
||||
125
oemcrypto/odk/src/core_message_serialize.cpp
Normal file
125
oemcrypto/odk/src/core_message_serialize.cpp
Normal file
@@ -0,0 +1,125 @@
|
||||
// Copyright 2019 Google LLC. All rights reserved. This file and proprietary
|
||||
// source code may only be used and distributed under the Widevine Master
|
||||
// License Agreement.
|
||||
|
||||
#include "core_message_serialize.h"
|
||||
|
||||
#include <cstddef>
|
||||
#include <cstdint>
|
||||
#include <cstring>
|
||||
#include <string>
|
||||
#include <vector>
|
||||
|
||||
#include "odk_serialize.h"
|
||||
#include "odk_structs.h"
|
||||
#include "odk_structs_priv.h"
|
||||
#include "serialization_base.h"
|
||||
|
||||
namespace oemcrypto_core_message {
|
||||
namespace serialize {
|
||||
namespace {
|
||||
|
||||
/**
|
||||
* Template for parsing requests
|
||||
*
|
||||
* Template arguments:
|
||||
* T: struct to be deserialized by odk
|
||||
* S: kdo input struct
|
||||
* P: auto-generated serializing function for |T|
|
||||
*/
|
||||
template <typename T, typename S, typename P>
|
||||
bool CreateResponse(uint32_t message_type, const S& core_request,
|
||||
std::string* oemcrypto_core_message, T& response,
|
||||
const P& packer) {
|
||||
if (!oemcrypto_core_message) {
|
||||
return false;
|
||||
}
|
||||
|
||||
auto* header = &response.request.core_message;
|
||||
header->message_type = message_type;
|
||||
header->nonce_values.api_major_version = core_request.api_major_version;
|
||||
header->nonce_values.api_minor_version = core_request.api_minor_version;
|
||||
header->nonce_values.nonce = core_request.nonce;
|
||||
header->nonce_values.session_id = core_request.session_id;
|
||||
// The message API version for the response is the minimum of our version and
|
||||
// the request's version.
|
||||
if (core_request.api_major_version > ODK_MAJOR_VERSION) {
|
||||
header->nonce_values.api_major_version = ODK_MAJOR_VERSION;
|
||||
header->nonce_values.api_minor_version = ODK_MINOR_VERSION;
|
||||
}
|
||||
|
||||
static constexpr size_t BUF_CAPACITY = 2048;
|
||||
std::vector<uint8_t> buf(BUF_CAPACITY, 0);
|
||||
Message* msg = nullptr;
|
||||
AllocateMessage(&msg, message_block);
|
||||
InitMessage(msg, buf.data(), buf.capacity());
|
||||
packer(msg, &response);
|
||||
if (!ValidMessage(msg)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
uint32_t message_length = GetSize(msg);
|
||||
InitMessage(msg, buf.data() + sizeof(header->message_type),
|
||||
sizeof(header->message_length));
|
||||
Pack_uint32_t(msg, &message_length);
|
||||
oemcrypto_core_message->assign(reinterpret_cast<const char*>(buf.data()),
|
||||
message_length);
|
||||
return true;
|
||||
}
|
||||
|
||||
bool CopyDeviceId(const ODK_ProvisioningRequest& src,
|
||||
ODK_ProvisioningResponse* dest) {
|
||||
auto& request = dest->request;
|
||||
const std::string& device_id = src.device_id;
|
||||
if (request.device_id_length > sizeof(request.device_id)) {
|
||||
return false;
|
||||
}
|
||||
request.device_id_length = device_id.size();
|
||||
memset(request.device_id, 0, sizeof(request.device_id));
|
||||
memcpy(request.device_id, device_id.data(), request.device_id_length);
|
||||
return true;
|
||||
}
|
||||
|
||||
} // namespace
|
||||
|
||||
bool CreateCoreLicenseResponse(const ODK_ParsedLicense& parsed_lic,
|
||||
const ODK_LicenseRequest& core_request,
|
||||
const std::string& core_request_sha256,
|
||||
std::string* oemcrypto_core_message) {
|
||||
ODK_LicenseResponse license_response{
|
||||
{}, const_cast<ODK_ParsedLicense*>(&parsed_lic), {0}};
|
||||
if (core_request_sha256.size() != sizeof(license_response.request_hash))
|
||||
return false;
|
||||
memcpy(license_response.request_hash, core_request_sha256.data(),
|
||||
sizeof(license_response.request_hash));
|
||||
return CreateResponse(ODK_License_Response_Type, core_request,
|
||||
oemcrypto_core_message, license_response,
|
||||
Pack_ODK_LicenseResponse);
|
||||
}
|
||||
|
||||
bool CreateCoreRenewalResponse(const ODK_RenewalRequest& core_request,
|
||||
uint64_t renewal_duration_seconds,
|
||||
std::string* oemcrypto_core_message) {
|
||||
ODK_RenewalResponse renewal_response{{}, core_request.playback_time_seconds};
|
||||
renewal_response.request.playback_time = core_request.playback_time_seconds;
|
||||
renewal_response.renewal_duration_seconds = renewal_duration_seconds;
|
||||
return CreateResponse(ODK_Renewal_Response_Type, core_request,
|
||||
oemcrypto_core_message, renewal_response,
|
||||
Pack_ODK_RenewalResponse);
|
||||
}
|
||||
|
||||
bool CreateCoreProvisioningResponse(const ODK_ParsedProvisioning& parsed_prov,
|
||||
const ODK_ProvisioningRequest& core_request,
|
||||
std::string* oemcrypto_core_message) {
|
||||
ODK_ProvisioningResponse prov_response{
|
||||
{}, const_cast<ODK_ParsedProvisioning*>(&parsed_prov)};
|
||||
if (!CopyDeviceId(core_request, &prov_response)) {
|
||||
return false;
|
||||
}
|
||||
return CreateResponse(ODK_Provisioning_Response_Type, core_request,
|
||||
oemcrypto_core_message, prov_response,
|
||||
Pack_ODK_ProvisioningResponse);
|
||||
}
|
||||
|
||||
} // namespace serialize
|
||||
} // namespace oemcrypto_core_message
|
||||
183
oemcrypto/odk/src/core_message_serialize_proto.cpp
Normal file
183
oemcrypto/odk/src/core_message_serialize_proto.cpp
Normal file
@@ -0,0 +1,183 @@
|
||||
// Copyright 2019 Google LLC. All rights reserved. This file and proprietary
|
||||
// source code may only be used and distributed under the Widevine Master
|
||||
// License Agreement.
|
||||
|
||||
#include "core_message_serialize_proto.h"
|
||||
|
||||
#include <algorithm>
|
||||
#include <cstddef>
|
||||
#include <cstdint>
|
||||
#include <cstring>
|
||||
#include <string>
|
||||
|
||||
#include "core_message_serialize.h"
|
||||
#include "license_protocol.pb.h"
|
||||
#include "odk_serialize.h"
|
||||
#include "odk_structs.h"
|
||||
#include "odk_structs_priv.h"
|
||||
#include "serialization_base.h"
|
||||
|
||||
namespace oemcrypto_core_message {
|
||||
namespace serialize {
|
||||
namespace {
|
||||
|
||||
/* @ private functions */
|
||||
|
||||
/**
|
||||
* Extract OEMCrypto_Substring (offset, length) from serialized protobuf
|
||||
*
|
||||
* Parameters:
|
||||
* message: serialized license protobuf
|
||||
* field: substring value
|
||||
*/
|
||||
OEMCrypto_Substring GetOecSubstring(const std::string& message,
|
||||
const std::string& field) {
|
||||
OEMCrypto_Substring substring = {};
|
||||
size_t pos = message.find(field);
|
||||
if (pos != std::string::npos) {
|
||||
substring = OEMCrypto_Substring{pos, field.length()};
|
||||
}
|
||||
return substring;
|
||||
}
|
||||
|
||||
OEMCrypto_KeyObject KeyContainerToOecKey(
|
||||
const std::string& proto, const video_widevine::License::KeyContainer& k) {
|
||||
OEMCrypto_KeyObject obj = {};
|
||||
obj.key_id = GetOecSubstring(proto, k.id());
|
||||
obj.key_data_iv = GetOecSubstring(proto, k.iv());
|
||||
// Strip off PKCS#5 padding - since we know the key is 16 or 32 bytes,
|
||||
// the padding will always be 16 bytes.
|
||||
const std::string& key_data = k.key();
|
||||
const size_t PKCS5_PADDING_SIZE = 16;
|
||||
obj.key_data = GetOecSubstring(
|
||||
proto, key_data.substr(0, std::max(PKCS5_PADDING_SIZE, key_data.size()) -
|
||||
PKCS5_PADDING_SIZE));
|
||||
if (k.has_key_control()) {
|
||||
const auto& key_control = k.key_control();
|
||||
obj.key_control_iv = GetOecSubstring(proto, key_control.iv());
|
||||
obj.key_control = GetOecSubstring(proto, key_control.key_control_block());
|
||||
}
|
||||
return obj;
|
||||
}
|
||||
|
||||
} // namespace
|
||||
|
||||
// @ public create response functions
|
||||
|
||||
bool CreateCoreLicenseResponseFromProto(const std::string& serialized_license,
|
||||
const ODK_LicenseRequest& core_request,
|
||||
const std::string& core_request_sha256,
|
||||
const bool nonce_required,
|
||||
std::string* oemcrypto_core_message) {
|
||||
video_widevine::License lic;
|
||||
if (!lic.ParseFromString(serialized_license)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
ODK_ParsedLicense parsed_lic{};
|
||||
bool any_content = false;
|
||||
bool any_entitlement = false;
|
||||
|
||||
for (int i = 0; i < lic.key_size(); ++i) {
|
||||
const auto& k = lic.key(i);
|
||||
switch (k.type()) {
|
||||
case video_widevine::License_KeyContainer::SIGNING: {
|
||||
if (!k.has_key()) {
|
||||
continue;
|
||||
}
|
||||
parsed_lic.enc_mac_keys_iv =
|
||||
GetOecSubstring(serialized_license, k.iv());
|
||||
parsed_lic.enc_mac_keys = GetOecSubstring(serialized_license, k.key());
|
||||
break;
|
||||
}
|
||||
case video_widevine::License_KeyContainer::CONTENT:
|
||||
case video_widevine::License_KeyContainer::OPERATOR_SESSION:
|
||||
case video_widevine::License_KeyContainer::ENTITLEMENT: {
|
||||
if (k.type() == video_widevine::License_KeyContainer::ENTITLEMENT) {
|
||||
any_entitlement = true;
|
||||
} else {
|
||||
any_content = true;
|
||||
}
|
||||
if (parsed_lic.key_array_length >= ODK_MAX_NUM_KEYS) {
|
||||
return false;
|
||||
}
|
||||
uint32_t& n = parsed_lic.key_array_length;
|
||||
parsed_lic.key_array[n++] = KeyContainerToOecKey(serialized_license, k);
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
continue;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (any_content && any_entitlement) {
|
||||
// TODO(b/147513335): this should be logged -- both type of keys.
|
||||
return false;
|
||||
}
|
||||
if (!any_content && !any_entitlement) {
|
||||
// TODO(b/147513335): this should be logged -- no keys?
|
||||
return false;
|
||||
}
|
||||
parsed_lic.license_type =
|
||||
any_content ? OEMCrypto_ContentLicense : OEMCrypto_EntitlementLicense;
|
||||
const auto& lid = lic.id();
|
||||
if (lid.has_provider_session_token()) {
|
||||
parsed_lic.pst =
|
||||
GetOecSubstring(serialized_license, lid.provider_session_token());
|
||||
}
|
||||
|
||||
if (lic.has_srm_requirement()) {
|
||||
parsed_lic.srm_restriction_data =
|
||||
GetOecSubstring(serialized_license, lic.srm_requirement());
|
||||
}
|
||||
|
||||
parsed_lic.nonce_required = nonce_required;
|
||||
const auto& policy = lic.policy();
|
||||
ODK_TimerLimits& timer_limits = parsed_lic.timer_limits;
|
||||
timer_limits.soft_enforce_rental_duration =
|
||||
policy.soft_enforce_rental_duration();
|
||||
timer_limits.soft_enforce_playback_duration =
|
||||
policy.soft_enforce_playback_duration();
|
||||
timer_limits.earliest_playback_start_seconds = 0;
|
||||
timer_limits.rental_duration_seconds = policy.rental_duration_seconds();
|
||||
timer_limits.total_playback_duration_seconds =
|
||||
policy.playback_duration_seconds();
|
||||
timer_limits.initial_renewal_duration_seconds =
|
||||
policy.renewal_delay_seconds() +
|
||||
policy.renewal_recovery_duration_seconds();
|
||||
|
||||
return CreateCoreLicenseResponse(parsed_lic, core_request,
|
||||
core_request_sha256, oemcrypto_core_message);
|
||||
}
|
||||
|
||||
bool CreateCoreProvisioningResponseFromProto(
|
||||
const std::string& serialized_provisioning_resp,
|
||||
const ODK_ProvisioningRequest& core_request,
|
||||
std::string* oemcrypto_core_message) {
|
||||
ODK_ParsedProvisioning parsed_prov{};
|
||||
video_widevine::ProvisioningResponse prov;
|
||||
if (!prov.ParseFromString(serialized_provisioning_resp)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
parsed_prov.key_type =
|
||||
OEMCrypto_RSA_Private_Key; // TODO(b/148404408): ECC or RSA
|
||||
if (prov.has_device_rsa_key()) {
|
||||
parsed_prov.enc_private_key =
|
||||
GetOecSubstring(serialized_provisioning_resp, prov.device_rsa_key());
|
||||
}
|
||||
if (prov.has_device_rsa_key_iv()) {
|
||||
parsed_prov.enc_private_key_iv =
|
||||
GetOecSubstring(serialized_provisioning_resp, prov.device_rsa_key_iv());
|
||||
}
|
||||
if (prov.has_wrapping_key()) {
|
||||
parsed_prov.encrypted_message_key =
|
||||
GetOecSubstring(serialized_provisioning_resp, prov.wrapping_key());
|
||||
}
|
||||
|
||||
return CreateCoreProvisioningResponse(parsed_prov, core_request,
|
||||
oemcrypto_core_message);
|
||||
}
|
||||
|
||||
} // namespace serialize
|
||||
} // namespace oemcrypto_core_message
|
||||
18
oemcrypto/odk/src/kdo.gypi
Normal file
18
oemcrypto/odk/src/kdo.gypi
Normal file
@@ -0,0 +1,18 @@
|
||||
# Copyright 2019 Google LLC. All rights reserved. This file and proprietary
|
||||
# source code may only be used and distributed under the Widevine Master License
|
||||
# Agreement.
|
||||
|
||||
# These files are used by the server and by some ODK test code. These files are
|
||||
# not built into the ODK library on the device.
|
||||
{
|
||||
'sources': [
|
||||
'core_message_deserialize.cpp',
|
||||
'core_message_serialize.cpp',
|
||||
'core_message_serialize_proto.cpp',
|
||||
],
|
||||
'include_dirs': [
|
||||
'src',
|
||||
'../include',
|
||||
],
|
||||
}
|
||||
|
||||
410
oemcrypto/odk/src/odk.c
Normal file
410
oemcrypto/odk/src/odk.c
Normal file
@@ -0,0 +1,410 @@
|
||||
/* Copyright 2019 Google LLC. All rights reserved. This file and proprietary */
|
||||
/* source code may only be used and distributed under the Widevine Master */
|
||||
/* License Agreement. */
|
||||
|
||||
#include "odk.h"
|
||||
|
||||
#include <stddef.h>
|
||||
#include <stdint.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "odk_overflow.h"
|
||||
#include "odk_serialize.h"
|
||||
#include "odk_structs.h"
|
||||
#include "odk_structs_priv.h"
|
||||
#include "odk_util.h"
|
||||
#include "serialization_base.h"
|
||||
|
||||
/* @ private odk functions */
|
||||
|
||||
static OEMCryptoResult ODK_PrepareRequest(
|
||||
uint8_t* message, size_t message_length, size_t* core_message_length,
|
||||
uint32_t message_type, const ODK_NonceValues* nonce_values,
|
||||
void* prepared_request_buffer, size_t prepared_request_buffer_length) {
|
||||
if (nonce_values == NULL || core_message_length == NULL ||
|
||||
prepared_request_buffer == NULL ||
|
||||
*core_message_length > message_length) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
|
||||
Message* msg = NULL;
|
||||
AllocateMessage(&msg, message_block);
|
||||
InitMessage(msg, message, *core_message_length);
|
||||
|
||||
/* The core message should be at the beginning of the buffer, and with a
|
||||
* shorter length. */
|
||||
if (sizeof(ODK_CoreMessage) > prepared_request_buffer_length) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
ODK_CoreMessage* core_message = (ODK_CoreMessage*)prepared_request_buffer;
|
||||
*core_message = (ODK_CoreMessage){
|
||||
message_type,
|
||||
0,
|
||||
*nonce_values,
|
||||
};
|
||||
|
||||
/* Set core message length, and pack prepared request into message if the
|
||||
* message buffer has been correctly initialized by the caller. */
|
||||
switch (message_type) {
|
||||
case ODK_License_Request_Type: {
|
||||
core_message->message_length = ODK_LICENSE_REQUEST_SIZE;
|
||||
if (sizeof(ODK_PreparedLicenseRequest) > prepared_request_buffer_length) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
Pack_ODK_PreparedLicenseRequest(
|
||||
msg, (ODK_PreparedLicenseRequest*)prepared_request_buffer);
|
||||
break;
|
||||
}
|
||||
case ODK_Renewal_Request_Type: {
|
||||
core_message->message_length = ODK_RENEWAL_REQUEST_SIZE;
|
||||
if (sizeof(ODK_PreparedRenewalRequest) > prepared_request_buffer_length) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
Pack_ODK_PreparedRenewalRequest(
|
||||
msg, (ODK_PreparedRenewalRequest*)prepared_request_buffer);
|
||||
break;
|
||||
}
|
||||
case ODK_Provisioning_Request_Type: {
|
||||
core_message->message_length = ODK_PROVISIONING_REQUEST_SIZE;
|
||||
if (sizeof(ODK_PreparedProvisioningRequest) >
|
||||
prepared_request_buffer_length) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
Pack_ODK_PreparedProvisioningRequest(
|
||||
msg, (ODK_PreparedProvisioningRequest*)prepared_request_buffer);
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
}
|
||||
|
||||
*core_message_length = core_message->message_length;
|
||||
if (GetStatus(msg) != MESSAGE_STATUS_OK) {
|
||||
/* This is to indicate the caller that the core_message_length has been
|
||||
* appropriately set, but the message buffer is either empty or too small,
|
||||
* which needs to be initialized and filled in the subsequent call. */
|
||||
return OEMCrypto_ERROR_SHORT_BUFFER;
|
||||
}
|
||||
if (GetSize(msg) != *core_message_length) {
|
||||
/* This should not happen. Something is wrong. */
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
return OEMCrypto_SUCCESS;
|
||||
}
|
||||
|
||||
static OEMCryptoResult ODK_ParseResponse(
|
||||
const uint8_t* message, size_t message_length, size_t core_message_length,
|
||||
uint32_t message_type, const ODK_NonceValues* nonce_values,
|
||||
void* response_buffer, uint32_t response_buffer_length) {
|
||||
if (message == NULL || response_buffer == NULL ||
|
||||
core_message_length > message_length) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
|
||||
Message* msg = NULL;
|
||||
AllocateMessage(&msg, message_block);
|
||||
/* We initialize the message buffer with a size of the entire message
|
||||
* length. */
|
||||
InitMessage(msg, (uint8_t*)message, message_length);
|
||||
/* The core message should be at the beginning of the buffer, and with a
|
||||
* shorter length. The core message is the part we are parsing. */
|
||||
SetSize(msg, core_message_length);
|
||||
|
||||
/* Parse message and unpack it into response buffer. */
|
||||
switch (message_type) {
|
||||
case ODK_License_Response_Type: {
|
||||
if (sizeof(ODK_LicenseResponse) > response_buffer_length) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
Unpack_ODK_LicenseResponse(msg, (ODK_LicenseResponse*)response_buffer);
|
||||
break;
|
||||
}
|
||||
case ODK_Renewal_Response_Type: {
|
||||
if (sizeof(ODK_RenewalResponse) > response_buffer_length) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
Unpack_ODK_RenewalResponse(msg, (ODK_RenewalResponse*)response_buffer);
|
||||
break;
|
||||
}
|
||||
case ODK_Provisioning_Response_Type: {
|
||||
if (sizeof(ODK_ProvisioningResponse) > response_buffer_length) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
Unpack_ODK_ProvisioningResponse(
|
||||
msg, (ODK_ProvisioningResponse*)response_buffer);
|
||||
break;
|
||||
}
|
||||
default: {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
}
|
||||
|
||||
ODK_CoreMessage* core_message = (ODK_CoreMessage*)response_buffer;
|
||||
if (GetStatus(msg) != MESSAGE_STATUS_OK ||
|
||||
message_type != core_message->message_type ||
|
||||
GetOffset(msg) != core_message->message_length) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
|
||||
if (nonce_values) {
|
||||
/* always verify nonce_values for Renewal and Provisioning responses */
|
||||
if (!ODK_NonceValuesEqual(nonce_values, &(core_message->nonce_values))) {
|
||||
return OEMCrypto_ERROR_INVALID_NONCE;
|
||||
}
|
||||
}
|
||||
|
||||
return OEMCrypto_SUCCESS;
|
||||
}
|
||||
|
||||
/* @ public odk functions */
|
||||
|
||||
/* @@ prepare request functions */
|
||||
|
||||
OEMCryptoResult ODK_PrepareCoreLicenseRequest(
|
||||
uint8_t* message, size_t message_length, size_t* core_message_length,
|
||||
const ODK_NonceValues* nonce_values) {
|
||||
if (core_message_length == NULL || nonce_values == NULL) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
ODK_PreparedLicenseRequest license_request = {
|
||||
{0},
|
||||
};
|
||||
return ODK_PrepareRequest(
|
||||
message, message_length, core_message_length, ODK_License_Request_Type,
|
||||
nonce_values, &license_request, sizeof(ODK_PreparedLicenseRequest));
|
||||
}
|
||||
|
||||
OEMCryptoResult ODK_PrepareCoreRenewalRequest(uint8_t* message,
|
||||
size_t message_length,
|
||||
size_t* core_message_size,
|
||||
ODK_NonceValues* nonce_values,
|
||||
ODK_ClockValues* clock_values,
|
||||
uint64_t system_time_seconds) {
|
||||
if (core_message_size == NULL || nonce_values == NULL ||
|
||||
clock_values == NULL) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
|
||||
/* If the license has not been loaded, then this is release instead of a
|
||||
* renewal. All releases use v15. */
|
||||
if (clock_values->timer_status == ODK_CLOCK_TIMER_STATUS_LICENSE_NOT_LOADED ||
|
||||
clock_values->timer_status == ODK_CLOCK_TIMER_STATUS_LICENSE_INACTIVE) {
|
||||
nonce_values->api_major_version = ODK_FIRST_VERSION - 1;
|
||||
}
|
||||
if (nonce_values->api_major_version < ODK_FIRST_VERSION) {
|
||||
*core_message_size = 0;
|
||||
return OEMCrypto_SUCCESS;
|
||||
}
|
||||
|
||||
ODK_PreparedRenewalRequest renewal_request = {{0}, 0};
|
||||
/* First, we compute the time this request was made relative to the playback
|
||||
* clock. */
|
||||
if (clock_values->time_of_first_decrypt == 0) {
|
||||
/* It is OK to preemptively request a renewal before playback starts.
|
||||
* We'll treat this as asking for a renewal at playback time 0. */
|
||||
renewal_request.playback_time = 0;
|
||||
} else {
|
||||
/* Otherwise, playback_time is relative to the first decrypt. */
|
||||
if (odk_sub_overflow_u64(system_time_seconds,
|
||||
clock_values->time_of_first_decrypt,
|
||||
&renewal_request.playback_time)) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
}
|
||||
|
||||
/* Save time for this request so that we can verify the response. This makes
|
||||
* all earlier requests invalid. If preparing this request fails, then all
|
||||
* requests will be bad. */
|
||||
clock_values->time_of_renewal_request = renewal_request.playback_time;
|
||||
|
||||
return ODK_PrepareRequest(
|
||||
message, message_length, core_message_size, ODK_Renewal_Request_Type,
|
||||
nonce_values, &renewal_request, sizeof(ODK_PreparedRenewalRequest));
|
||||
}
|
||||
|
||||
OEMCryptoResult ODK_PrepareCoreProvisioningRequest(
|
||||
uint8_t* message, size_t message_length, size_t* core_message_length,
|
||||
const ODK_NonceValues* nonce_values, const uint8_t* device_id,
|
||||
size_t device_id_length) {
|
||||
if (core_message_length == NULL || nonce_values == NULL) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
ODK_PreparedProvisioningRequest provisioning_request = {
|
||||
{0},
|
||||
0,
|
||||
{0},
|
||||
};
|
||||
if (device_id_length > sizeof(provisioning_request.device_id)) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
provisioning_request.device_id_length = device_id_length;
|
||||
if (device_id) {
|
||||
memcpy(provisioning_request.device_id, device_id, device_id_length);
|
||||
}
|
||||
return ODK_PrepareRequest(message, message_length, core_message_length,
|
||||
ODK_Provisioning_Request_Type, nonce_values,
|
||||
&provisioning_request,
|
||||
sizeof(ODK_PreparedProvisioningRequest));
|
||||
}
|
||||
|
||||
/* @@ parse response functions */
|
||||
|
||||
OEMCryptoResult ODK_ParseLicense(
|
||||
const uint8_t* message, size_t message_length, size_t core_message_length,
|
||||
bool initial_license_load, bool usage_entry_present,
|
||||
const uint8_t* request_hash, ODK_TimerLimits* timer_limits,
|
||||
ODK_ClockValues* clock_values, ODK_NonceValues* nonce_values,
|
||||
ODK_ParsedLicense* parsed_license) {
|
||||
if (message == NULL || request_hash == NULL || timer_limits == NULL ||
|
||||
clock_values == NULL || nonce_values == NULL || parsed_license == NULL) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
|
||||
ODK_LicenseResponse license_response = {{{0}}, parsed_license, {0}};
|
||||
const OEMCryptoResult err = ODK_ParseResponse(
|
||||
message, message_length, core_message_length, ODK_License_Response_Type,
|
||||
NULL, &license_response, sizeof(ODK_LicenseResponse));
|
||||
|
||||
if (err != OEMCrypto_SUCCESS) {
|
||||
return err;
|
||||
}
|
||||
|
||||
/* We do not support future API version. Also, this function should not be
|
||||
* used for legacy licenses. */
|
||||
if (license_response.request.core_message.nonce_values.api_major_version >
|
||||
ODK_MAJOR_VERSION ||
|
||||
license_response.request.core_message.nonce_values.api_major_version <
|
||||
ODK_FIRST_VERSION) {
|
||||
return ODK_UNSUPPORTED_API;
|
||||
}
|
||||
|
||||
/* If the server sent us an older format, record the license's API version. */
|
||||
if (nonce_values->api_major_version >
|
||||
license_response.request.core_message.nonce_values.api_major_version) {
|
||||
nonce_values->api_major_version =
|
||||
license_response.request.core_message.nonce_values.api_major_version;
|
||||
nonce_values->api_minor_version =
|
||||
license_response.request.core_message.nonce_values.api_minor_version;
|
||||
} else if (nonce_values->api_minor_version >
|
||||
license_response.request.core_message.nonce_values
|
||||
.api_minor_version) {
|
||||
nonce_values->api_minor_version =
|
||||
license_response.request.core_message.nonce_values.api_minor_version;
|
||||
}
|
||||
/* If the license has a provider session token (pst), then OEMCrypto should
|
||||
* have a usage entry loaded. The opposite is also an error. */
|
||||
if ((usage_entry_present && parsed_license->pst.length == 0) ||
|
||||
(!usage_entry_present && parsed_license->pst.length > 0)) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
|
||||
if (parsed_license->nonce_required) {
|
||||
if (initial_license_load) {
|
||||
if (nonce_values->nonce !=
|
||||
license_response.request.core_message.nonce_values.nonce ||
|
||||
nonce_values->session_id !=
|
||||
license_response.request.core_message.nonce_values.session_id) {
|
||||
return OEMCrypto_ERROR_INVALID_NONCE;
|
||||
}
|
||||
} else { /* !initial_license_load */
|
||||
nonce_values->nonce =
|
||||
license_response.request.core_message.nonce_values.nonce;
|
||||
nonce_values->session_id =
|
||||
license_response.request.core_message.nonce_values.session_id;
|
||||
}
|
||||
}
|
||||
/* For v16, in order to be backwards compatible with a v15 license server,
|
||||
* OEMCrypto stores a hash of the core license request and only signs the
|
||||
* message body. Here, when we process the license response, we verify that
|
||||
* the server has the same hash of the core request. */
|
||||
if (initial_license_load && parsed_license->nonce_required &&
|
||||
crypto_memcmp(request_hash, license_response.request_hash,
|
||||
ODK_SHA256_HASH_SIZE)) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
*timer_limits = parsed_license->timer_limits;
|
||||
/* And update the clock values state. */
|
||||
clock_values->timer_status = ODK_CLOCK_TIMER_STATUS_LICENSE_LOADED;
|
||||
return OEMCrypto_SUCCESS;
|
||||
}
|
||||
|
||||
OEMCryptoResult ODK_ParseRenewal(const uint8_t* message, size_t message_length,
|
||||
size_t core_message_length,
|
||||
const ODK_NonceValues* nonce_values,
|
||||
uint64_t system_time,
|
||||
const ODK_TimerLimits* timer_limits,
|
||||
ODK_ClockValues* clock_values,
|
||||
uint64_t* timer_value) {
|
||||
if (message == NULL || nonce_values == NULL || timer_limits == NULL ||
|
||||
clock_values == NULL) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
|
||||
ODK_RenewalResponse renewal_response = {
|
||||
{{0}, 0},
|
||||
0,
|
||||
};
|
||||
const OEMCryptoResult err = ODK_ParseResponse(
|
||||
message, message_length, core_message_length, ODK_Renewal_Response_Type,
|
||||
nonce_values, &renewal_response, sizeof(ODK_RenewalResponse));
|
||||
|
||||
if (err != OEMCrypto_SUCCESS) {
|
||||
return err;
|
||||
}
|
||||
|
||||
/* Reference:
|
||||
* Doc: License Duration and Renewal (Changes for OEMCrypto v16)
|
||||
* Section: Renewal Message
|
||||
*/
|
||||
/* If a renewal request is lost in transit, we should throw it out and create
|
||||
* a new one. We use the timestamp to make sure we have the latest request.
|
||||
*/
|
||||
if (clock_values->time_of_renewal_request <
|
||||
renewal_response.request.playback_time) {
|
||||
return ODK_STALE_RENEWAL;
|
||||
}
|
||||
return ODK_ComputeRenewalDuration(timer_limits, clock_values, system_time,
|
||||
renewal_response.renewal_duration_seconds,
|
||||
timer_value);
|
||||
}
|
||||
|
||||
OEMCryptoResult ODK_ParseProvisioning(
|
||||
const uint8_t* message, size_t message_length, size_t core_message_length,
|
||||
const ODK_NonceValues* nonce_values, const uint8_t* device_id,
|
||||
size_t device_id_length, ODK_ParsedProvisioning* parsed_response) {
|
||||
if (message == NULL || nonce_values == NULL || device_id == NULL ||
|
||||
parsed_response == NULL) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
|
||||
ODK_ProvisioningResponse provisioning_response = {{{0}, 0, {0}},
|
||||
parsed_response};
|
||||
if (device_id_length > ODK_DEVICE_ID_LEN_MAX) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
|
||||
const OEMCryptoResult err = ODK_ParseResponse(
|
||||
message, message_length, core_message_length,
|
||||
ODK_Provisioning_Response_Type, nonce_values, &provisioning_response,
|
||||
sizeof(ODK_ProvisioningResponse));
|
||||
|
||||
if (err != OEMCrypto_SUCCESS) {
|
||||
return err;
|
||||
}
|
||||
|
||||
if (crypto_memcmp(device_id, provisioning_response.request.device_id,
|
||||
device_id_length) != 0) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
|
||||
const uint8_t zero[ODK_DEVICE_ID_LEN_MAX] = {0};
|
||||
/* check bytes beyond device_id_length are 0 */
|
||||
if (crypto_memcmp(zero,
|
||||
provisioning_response.request.device_id + device_id_length,
|
||||
ODK_DEVICE_ID_LEN_MAX - device_id_length) != 0) {
|
||||
return ODK_ERROR_CORE_MESSAGE;
|
||||
}
|
||||
|
||||
return OEMCrypto_SUCCESS;
|
||||
}
|
||||
24
oemcrypto/odk/src/odk.gyp
Normal file
24
oemcrypto/odk/src/odk.gyp
Normal file
@@ -0,0 +1,24 @@
|
||||
# Copyright 2019 Google LLC. All rights reserved. This file and proprietary
|
||||
# source code may only be used and distributed under the Widevine Master License
|
||||
# Agreement.
|
||||
|
||||
{
|
||||
'targets': [
|
||||
{
|
||||
'target_name': 'odk',
|
||||
'type': 'static_library',
|
||||
'include_dirs': [
|
||||
'../include',
|
||||
'../../include',
|
||||
],
|
||||
'includes' : [
|
||||
'odk.gypi',
|
||||
],
|
||||
'direct_dependent_settings': {
|
||||
'include_dirs': [
|
||||
'../include',
|
||||
],
|
||||
}
|
||||
},
|
||||
],
|
||||
}
|
||||
17
oemcrypto/odk/src/odk.gypi
Normal file
17
oemcrypto/odk/src/odk.gypi
Normal file
@@ -0,0 +1,17 @@
|
||||
# Copyright 2019 Google LLC. All rights reserved. This file and proprietary
|
||||
# source code may only be used and distributed under the Widevine Master License
|
||||
# Agreement.
|
||||
|
||||
# These files are built into the ODK library on the device. They are also used
|
||||
# by the server and by test cocde. These files should compile on C99 compilers.
|
||||
{
|
||||
'sources': [
|
||||
'odk.c',
|
||||
'odk_overflow.c',
|
||||
'odk_serialize.c',
|
||||
'odk_timer.c',
|
||||
'odk_util.c',
|
||||
'serialization_base.c',
|
||||
],
|
||||
}
|
||||
|
||||
24
oemcrypto/odk/src/odk_assert.h
Normal file
24
oemcrypto/odk/src/odk_assert.h
Normal file
@@ -0,0 +1,24 @@
|
||||
/* Copyright 2019 Google LLC. All rights reserved. This file and proprietary */
|
||||
/* source code may only be used and distributed under the Widevine Master */
|
||||
/* License Agreement. */
|
||||
|
||||
#ifndef WIDEVINE_ODK_SRC_ODK_ASSERT_H_
|
||||
#define WIDEVINE_ODK_SRC_ODK_ASSERT_H_
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
#if (__STDC_VERSION__ >= 201112L)
|
||||
#include <assert.h>
|
||||
#define odk_static_assert static_assert
|
||||
#else
|
||||
#define odk_static_assert(msg, e) \
|
||||
enum { odk_static_assert = 1 / (!!((msg) && (e))) };
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* WIDEVINE_ODK_SRC_ODK_ASSERT_H_ */
|
||||
29
oemcrypto/odk/src/odk_endian.h
Normal file
29
oemcrypto/odk/src/odk_endian.h
Normal file
@@ -0,0 +1,29 @@
|
||||
/* Copyright 2019 Google LLC. All rights reserved. This file and proprietary */
|
||||
/* source code may only be used and distributed under the Widevine Master */
|
||||
/* License Agreement. */
|
||||
|
||||
#ifndef WIDEVINE_ODK_SRC_ODK_ENDIAN_H_
|
||||
#define WIDEVINE_ODK_SRC_ODK_ENDIAN_H_
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
#if defined(__linux__) || defined(__ANDROID__)
|
||||
#include <endian.h>
|
||||
#define oemcrypto_htobe32 htobe32
|
||||
#define oemcrypto_be32toh be32toh
|
||||
#define oemcrypto_htobe64 htobe64
|
||||
#define oemcrypto_be64toh be64toh
|
||||
#else /* defined(__linux__) || defined(__ANDROID__) */
|
||||
uint32_t oemcrypto_htobe32(uint32_t u32);
|
||||
uint32_t oemcrypto_be32toh(uint32_t u32);
|
||||
uint64_t oemcrypto_htobe64(uint64_t u64);
|
||||
uint64_t oemcrypto_be64toh(uint64_t u64);
|
||||
#endif /* defined(__linux__) || defined(__ANDROID__) */
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* WIDEVINE_ODK_SRC_ODK_ENDIAN_H_ */
|
||||
36
oemcrypto/odk/src/odk_overflow.c
Normal file
36
oemcrypto/odk/src/odk_overflow.c
Normal file
@@ -0,0 +1,36 @@
|
||||
/* Copyright 2019 Google LLC. All rights reserved. This file and proprietary */
|
||||
/* source code may only be used and distributed under the Widevine Master */
|
||||
/* License Agreement. */
|
||||
|
||||
#include <stddef.h>
|
||||
#include <stdint.h>
|
||||
|
||||
int odk_sub_overflow_u64(uint64_t a, uint64_t b, uint64_t* c) {
|
||||
if (a >= b) {
|
||||
if (c) {
|
||||
*c = a - b;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
int odk_add_overflow_u64(uint64_t a, uint64_t b, uint64_t* c) {
|
||||
if (UINT64_MAX - a >= b) {
|
||||
if (c) {
|
||||
*c = a + b;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
int odk_add_overflow_ux(size_t a, size_t b, size_t* c) {
|
||||
if (SIZE_MAX - a >= b) {
|
||||
if (c) {
|
||||
*c = a + b;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
23
oemcrypto/odk/src/odk_overflow.h
Normal file
23
oemcrypto/odk/src/odk_overflow.h
Normal file
@@ -0,0 +1,23 @@
|
||||
/* Copyright 2019 Google LLC. All rights reserved. This file and proprietary */
|
||||
/* source code may only be used and distributed under the Widevine Master */
|
||||
/* License Agreement. */
|
||||
|
||||
#ifndef WIDEVINE_ODK_SRC_ODK_OVERFLOW_H_
|
||||
#define WIDEVINE_ODK_SRC_ODK_OVERFLOW_H_
|
||||
|
||||
#include <stddef.h>
|
||||
#include <stdint.h>
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
int odk_sub_overflow_u64(uint64_t a, uint64_t b, uint64_t* c);
|
||||
int odk_add_overflow_u64(uint64_t a, uint64_t b, uint64_t* c);
|
||||
int odk_add_overflow_ux(size_t a, size_t b, size_t* c);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* WIDEVINE_ODK_SRC_ODK_OVERFLOW_H_ */
|
||||
213
oemcrypto/odk/src/odk_serialize.c
Normal file
213
oemcrypto/odk/src/odk_serialize.c
Normal file
@@ -0,0 +1,213 @@
|
||||
/* Copyright 2019 Google LLC. All rights reserved. This file and proprietary */
|
||||
/* source code may only be used and distributed under the Widevine Master */
|
||||
/* License Agreement. */
|
||||
|
||||
/*
|
||||
* This code is auto-generated, do not edit
|
||||
*/
|
||||
|
||||
#include "odk_structs_priv.h"
|
||||
#include "serialization_base.h"
|
||||
|
||||
/* @ serialize */
|
||||
|
||||
/* @@ private serialize */
|
||||
|
||||
static void Pack_ODK_NonceValues(Message* msg, ODK_NonceValues const* obj) {
|
||||
Pack_uint16_t(msg, &obj->api_minor_version);
|
||||
Pack_uint16_t(msg, &obj->api_major_version);
|
||||
Pack_uint32_t(msg, &obj->nonce);
|
||||
Pack_uint32_t(msg, &obj->session_id);
|
||||
}
|
||||
|
||||
static void Pack_ODK_CoreMessage(Message* msg, ODK_CoreMessage const* obj) {
|
||||
Pack_uint32_t(msg, &obj->message_type);
|
||||
Pack_uint32_t(msg, &obj->message_length);
|
||||
Pack_ODK_NonceValues(msg, &obj->nonce_values);
|
||||
}
|
||||
|
||||
static void Pack_OEMCrypto_KeyObject(Message* msg,
|
||||
OEMCrypto_KeyObject const* obj) {
|
||||
Pack_OEMCrypto_Substring(msg, &obj->key_id);
|
||||
Pack_OEMCrypto_Substring(msg, &obj->key_data_iv);
|
||||
Pack_OEMCrypto_Substring(msg, &obj->key_data);
|
||||
Pack_OEMCrypto_Substring(msg, &obj->key_control_iv);
|
||||
Pack_OEMCrypto_Substring(msg, &obj->key_control);
|
||||
}
|
||||
|
||||
static void Pack_ODK_TimerLimits(Message* msg, ODK_TimerLimits const* obj) {
|
||||
Pack_bool(msg, &obj->soft_enforce_rental_duration);
|
||||
Pack_bool(msg, &obj->soft_enforce_playback_duration);
|
||||
Pack_uint64_t(msg, &obj->earliest_playback_start_seconds);
|
||||
Pack_uint64_t(msg, &obj->rental_duration_seconds);
|
||||
Pack_uint64_t(msg, &obj->total_playback_duration_seconds);
|
||||
Pack_uint64_t(msg, &obj->initial_renewal_duration_seconds);
|
||||
}
|
||||
|
||||
static void Pack_ODK_ParsedLicense(Message* msg, ODK_ParsedLicense const* obj) {
|
||||
/* hand-coded */
|
||||
if (obj->key_array_length > ODK_MAX_NUM_KEYS) {
|
||||
SetStatus(msg, MESSAGE_STATUS_OVERFLOW_ERROR);
|
||||
return;
|
||||
}
|
||||
Pack_OEMCrypto_Substring(msg, &obj->enc_mac_keys_iv);
|
||||
Pack_OEMCrypto_Substring(msg, &obj->enc_mac_keys);
|
||||
Pack_OEMCrypto_Substring(msg, &obj->pst);
|
||||
Pack_OEMCrypto_Substring(msg, &obj->srm_restriction_data);
|
||||
Pack_enum(msg, obj->license_type);
|
||||
Pack_bool(msg, &obj->nonce_required);
|
||||
Pack_ODK_TimerLimits(msg, &obj->timer_limits);
|
||||
Pack_uint32_t(msg, &obj->key_array_length);
|
||||
size_t i;
|
||||
for (i = 0; i < (size_t)obj->key_array_length; i++) {
|
||||
Pack_OEMCrypto_KeyObject(msg, &obj->key_array[i]);
|
||||
}
|
||||
}
|
||||
|
||||
static void Pack_ODK_ParsedProvisioning(Message* msg,
|
||||
ODK_ParsedProvisioning const* obj) {
|
||||
Pack_enum(msg, obj->key_type);
|
||||
Pack_OEMCrypto_Substring(msg, &obj->enc_private_key);
|
||||
Pack_OEMCrypto_Substring(msg, &obj->enc_private_key_iv);
|
||||
Pack_OEMCrypto_Substring(msg, &obj->encrypted_message_key);
|
||||
}
|
||||
|
||||
/* @@ odk serialize */
|
||||
|
||||
void Pack_ODK_PreparedLicenseRequest(Message* msg,
|
||||
ODK_PreparedLicenseRequest const* obj) {
|
||||
Pack_ODK_CoreMessage(msg, &obj->core_message);
|
||||
}
|
||||
|
||||
void Pack_ODK_PreparedRenewalRequest(Message* msg,
|
||||
ODK_PreparedRenewalRequest const* obj) {
|
||||
Pack_ODK_CoreMessage(msg, &obj->core_message);
|
||||
Pack_uint64_t(msg, &obj->playback_time);
|
||||
}
|
||||
|
||||
void Pack_ODK_PreparedProvisioningRequest(
|
||||
Message* msg, ODK_PreparedProvisioningRequest const* obj) {
|
||||
Pack_ODK_CoreMessage(msg, &obj->core_message);
|
||||
Pack_uint32_t(msg, &obj->device_id_length);
|
||||
PackArray(msg, &obj->device_id[0], sizeof(obj->device_id));
|
||||
}
|
||||
|
||||
/* @@ kdo serialize */
|
||||
|
||||
void Pack_ODK_LicenseResponse(Message* msg, ODK_LicenseResponse const* obj) {
|
||||
Pack_ODK_PreparedLicenseRequest(msg, &obj->request);
|
||||
Pack_ODK_ParsedLicense(msg, (const ODK_ParsedLicense*)obj->parsed_license);
|
||||
PackArray(msg, &obj->request_hash[0], sizeof(obj->request_hash));
|
||||
}
|
||||
|
||||
void Pack_ODK_RenewalResponse(Message* msg, ODK_RenewalResponse const* obj) {
|
||||
Pack_ODK_PreparedRenewalRequest(msg, &obj->request);
|
||||
Pack_uint64_t(msg, &obj->renewal_duration_seconds);
|
||||
}
|
||||
|
||||
void Pack_ODK_ProvisioningResponse(Message* msg,
|
||||
ODK_ProvisioningResponse const* obj) {
|
||||
Pack_ODK_PreparedProvisioningRequest(msg, &obj->request);
|
||||
Pack_ODK_ParsedProvisioning(
|
||||
msg, (const ODK_ParsedProvisioning*)obj->parsed_provisioning);
|
||||
}
|
||||
|
||||
/* @ deserialize */
|
||||
|
||||
/* @@ private deserialize */
|
||||
|
||||
static void Unpack_ODK_NonceValues(Message* msg, ODK_NonceValues* obj) {
|
||||
Unpack_uint16_t(msg, &obj->api_minor_version);
|
||||
Unpack_uint16_t(msg, &obj->api_major_version);
|
||||
Unpack_uint32_t(msg, &obj->nonce);
|
||||
Unpack_uint32_t(msg, &obj->session_id);
|
||||
}
|
||||
|
||||
static void Unpack_ODK_CoreMessage(Message* msg, ODK_CoreMessage* obj) {
|
||||
Unpack_uint32_t(msg, &obj->message_type);
|
||||
Unpack_uint32_t(msg, &obj->message_length);
|
||||
Unpack_ODK_NonceValues(msg, &obj->nonce_values);
|
||||
}
|
||||
|
||||
static void Unpack_OEMCrypto_KeyObject(Message* msg, OEMCrypto_KeyObject* obj) {
|
||||
Unpack_OEMCrypto_Substring(msg, &obj->key_id);
|
||||
Unpack_OEMCrypto_Substring(msg, &obj->key_data_iv);
|
||||
Unpack_OEMCrypto_Substring(msg, &obj->key_data);
|
||||
Unpack_OEMCrypto_Substring(msg, &obj->key_control_iv);
|
||||
Unpack_OEMCrypto_Substring(msg, &obj->key_control);
|
||||
}
|
||||
|
||||
static void Unpack_ODK_TimerLimits(Message* msg, ODK_TimerLimits* obj) {
|
||||
Unpack_bool(msg, &obj->soft_enforce_rental_duration);
|
||||
Unpack_bool(msg, &obj->soft_enforce_playback_duration);
|
||||
Unpack_uint64_t(msg, &obj->earliest_playback_start_seconds);
|
||||
Unpack_uint64_t(msg, &obj->rental_duration_seconds);
|
||||
Unpack_uint64_t(msg, &obj->total_playback_duration_seconds);
|
||||
Unpack_uint64_t(msg, &obj->initial_renewal_duration_seconds);
|
||||
}
|
||||
|
||||
static void Unpack_ODK_ParsedLicense(Message* msg, ODK_ParsedLicense* obj) {
|
||||
Unpack_OEMCrypto_Substring(msg, &obj->enc_mac_keys_iv);
|
||||
Unpack_OEMCrypto_Substring(msg, &obj->enc_mac_keys);
|
||||
Unpack_OEMCrypto_Substring(msg, &obj->pst);
|
||||
Unpack_OEMCrypto_Substring(msg, &obj->srm_restriction_data);
|
||||
obj->license_type = (OEMCrypto_LicenseType)Unpack_enum(msg);
|
||||
Unpack_bool(msg, &obj->nonce_required);
|
||||
Unpack_ODK_TimerLimits(msg, &obj->timer_limits);
|
||||
Unpack_uint32_t(msg, &obj->key_array_length);
|
||||
if (obj->key_array_length > ODK_MAX_NUM_KEYS) {
|
||||
SetStatus(msg, MESSAGE_STATUS_OVERFLOW_ERROR);
|
||||
return;
|
||||
}
|
||||
uint32_t i;
|
||||
for (i = 0; i < obj->key_array_length; i++) {
|
||||
Unpack_OEMCrypto_KeyObject(msg, &obj->key_array[i]);
|
||||
}
|
||||
}
|
||||
|
||||
static void Unpack_ODK_ParsedProvisioning(Message* msg,
|
||||
ODK_ParsedProvisioning* obj) {
|
||||
obj->key_type = (OEMCrypto_PrivateKeyType)Unpack_enum(msg);
|
||||
Unpack_OEMCrypto_Substring(msg, &obj->enc_private_key);
|
||||
Unpack_OEMCrypto_Substring(msg, &obj->enc_private_key_iv);
|
||||
Unpack_OEMCrypto_Substring(msg, &obj->encrypted_message_key);
|
||||
}
|
||||
|
||||
/* @ kdo deserialize */
|
||||
|
||||
void Unpack_ODK_PreparedLicenseRequest(Message* msg,
|
||||
ODK_PreparedLicenseRequest* obj) {
|
||||
Unpack_ODK_CoreMessage(msg, &obj->core_message);
|
||||
}
|
||||
|
||||
void Unpack_ODK_PreparedRenewalRequest(Message* msg,
|
||||
ODK_PreparedRenewalRequest* obj) {
|
||||
Unpack_ODK_CoreMessage(msg, &obj->core_message);
|
||||
Unpack_uint64_t(msg, &obj->playback_time);
|
||||
}
|
||||
|
||||
void Unpack_ODK_PreparedProvisioningRequest(
|
||||
Message* msg, ODK_PreparedProvisioningRequest* obj) {
|
||||
Unpack_ODK_CoreMessage(msg, &obj->core_message);
|
||||
Unpack_uint32_t(msg, &obj->device_id_length);
|
||||
UnpackArray(msg, &obj->device_id[0], sizeof(obj->device_id));
|
||||
}
|
||||
|
||||
/* @@ odk deserialize */
|
||||
|
||||
void Unpack_ODK_LicenseResponse(Message* msg, ODK_LicenseResponse* obj) {
|
||||
Unpack_ODK_PreparedLicenseRequest(msg, &obj->request);
|
||||
Unpack_ODK_ParsedLicense(msg, obj->parsed_license);
|
||||
UnpackArray(msg, &obj->request_hash[0], sizeof(obj->request_hash));
|
||||
}
|
||||
|
||||
void Unpack_ODK_RenewalResponse(Message* msg, ODK_RenewalResponse* obj) {
|
||||
Unpack_ODK_PreparedRenewalRequest(msg, &obj->request);
|
||||
Unpack_uint64_t(msg, &obj->renewal_duration_seconds);
|
||||
}
|
||||
|
||||
void Unpack_ODK_ProvisioningResponse(Message* msg,
|
||||
ODK_ProvisioningResponse* obj) {
|
||||
Unpack_ODK_PreparedProvisioningRequest(msg, &obj->request);
|
||||
Unpack_ODK_ParsedProvisioning(msg, obj->parsed_provisioning);
|
||||
}
|
||||
49
oemcrypto/odk/src/odk_serialize.h
Normal file
49
oemcrypto/odk/src/odk_serialize.h
Normal file
@@ -0,0 +1,49 @@
|
||||
/* Copyright 2019 Google LLC. All rights reserved. This file and proprietary */
|
||||
/* source code may only be used and distributed under the Widevine Master */
|
||||
/* License Agreement. */
|
||||
|
||||
/*
|
||||
* This code is auto-generated, do not edit
|
||||
*/
|
||||
#ifndef WIDEVINE_ODK_SRC_ODK_SERIALIZE_H_
|
||||
#define WIDEVINE_ODK_SRC_ODK_SERIALIZE_H_
|
||||
|
||||
#include "odk_structs_priv.h"
|
||||
#include "serialization_base.h"
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
/* odk pack */
|
||||
void Pack_ODK_PreparedLicenseRequest(Message* msg,
|
||||
const ODK_PreparedLicenseRequest* obj);
|
||||
void Pack_ODK_PreparedRenewalRequest(Message* msg,
|
||||
const ODK_PreparedRenewalRequest* obj);
|
||||
void Pack_ODK_PreparedProvisioningRequest(
|
||||
Message* msg, const ODK_PreparedProvisioningRequest* obj);
|
||||
|
||||
/* odk unpack */
|
||||
void Unpack_ODK_LicenseResponse(Message* msg, ODK_LicenseResponse* obj);
|
||||
void Unpack_ODK_RenewalResponse(Message* msg, ODK_RenewalResponse* obj);
|
||||
void Unpack_ODK_ProvisioningResponse(Message* msg,
|
||||
ODK_ProvisioningResponse* obj);
|
||||
|
||||
/* kdo pack */
|
||||
void Pack_ODK_LicenseResponse(Message* msg, const ODK_LicenseResponse* obj);
|
||||
void Pack_ODK_RenewalResponse(Message* msg, const ODK_RenewalResponse* obj);
|
||||
void Pack_ODK_ProvisioningResponse(Message* msg,
|
||||
const ODK_ProvisioningResponse* obj);
|
||||
|
||||
/* kdo unpack */
|
||||
void Unpack_ODK_PreparedLicenseRequest(Message* msg,
|
||||
ODK_PreparedLicenseRequest* obj);
|
||||
void Unpack_ODK_PreparedRenewalRequest(Message* msg,
|
||||
ODK_PreparedRenewalRequest* obj);
|
||||
void Unpack_ODK_PreparedProvisioningRequest(
|
||||
Message* msg, ODK_PreparedProvisioningRequest* obj);
|
||||
|
||||
#ifdef __cplusplus
|
||||
} /* extern "C" */
|
||||
#endif
|
||||
#endif /* WIDEVINE_ODK_SRC_ODK_SERIALIZE_H_ */
|
||||
104
oemcrypto/odk/src/odk_structs_priv.h
Normal file
104
oemcrypto/odk/src/odk_structs_priv.h
Normal file
@@ -0,0 +1,104 @@
|
||||
/* Copyright 2019 Google LLC. All rights reserved. This file and proprietary */
|
||||
/* source code may only be used and distributed under the Widevine Master */
|
||||
/* License Agreement. */
|
||||
|
||||
#ifndef WIDEVINE_ODK_SRC_ODK_STRUCTS_PRIV_H_
|
||||
#define WIDEVINE_ODK_SRC_ODK_STRUCTS_PRIV_H_
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
#include "OEMCryptoCENCCommon.h"
|
||||
#include "odk_structs.h"
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
typedef enum {
|
||||
ODK_License_Request_Type = 1,
|
||||
ODK_License_Response_Type = 2,
|
||||
ODK_Renewal_Request_Type = 3,
|
||||
ODK_Renewal_Response_Type = 4,
|
||||
ODK_Provisioning_Request_Type = 5,
|
||||
ODK_Provisioning_Response_Type = 6,
|
||||
|
||||
/* Reserve future message types to support forward compatibility. */
|
||||
ODK_Release_Request_Type = 7,
|
||||
ODK_Release_Response_Type = 8,
|
||||
} ODK_MessageType;
|
||||
|
||||
typedef struct {
|
||||
uint32_t message_type;
|
||||
uint32_t message_length;
|
||||
ODK_NonceValues nonce_values;
|
||||
} ODK_CoreMessage;
|
||||
|
||||
typedef struct {
|
||||
ODK_CoreMessage core_message;
|
||||
} ODK_PreparedLicenseRequest;
|
||||
|
||||
typedef struct {
|
||||
ODK_CoreMessage core_message;
|
||||
uint64_t playback_time;
|
||||
} ODK_PreparedRenewalRequest;
|
||||
|
||||
typedef struct {
|
||||
ODK_CoreMessage core_message;
|
||||
uint32_t device_id_length;
|
||||
uint8_t device_id[ODK_DEVICE_ID_LEN_MAX];
|
||||
} ODK_PreparedProvisioningRequest;
|
||||
|
||||
typedef struct {
|
||||
ODK_PreparedLicenseRequest request;
|
||||
ODK_ParsedLicense* parsed_license;
|
||||
uint8_t request_hash[ODK_SHA256_HASH_SIZE];
|
||||
} ODK_LicenseResponse;
|
||||
|
||||
typedef struct {
|
||||
ODK_PreparedRenewalRequest request;
|
||||
uint64_t renewal_duration_seconds;
|
||||
} ODK_RenewalResponse;
|
||||
|
||||
typedef struct {
|
||||
ODK_PreparedProvisioningRequest request;
|
||||
ODK_ParsedProvisioning* parsed_provisioning;
|
||||
} ODK_ProvisioningResponse;
|
||||
|
||||
/* These are the sum of sizeof of each individual member of the request structs
|
||||
*/
|
||||
/* without any padding added by the compiler. Make sure they get updated when */
|
||||
/* request structs change. Refer to test suite OdkSizeTest in */
|
||||
/* ../test/odk_test.cpp for validations of each of the defined request sizes. */
|
||||
#define ODK_LICENSE_REQUEST_SIZE 20
|
||||
#define ODK_RENEWAL_REQUEST_SIZE 28
|
||||
#define ODK_PROVISIONING_REQUEST_SIZE 88
|
||||
|
||||
/* These are the possible timer status values. */
|
||||
#define ODK_CLOCK_TIMER_STATUS_UNDEFINED 0 /* Should not happen. */
|
||||
/* When the structure has been initialized, but no license is loaded. */
|
||||
#define ODK_CLOCK_TIMER_STATUS_LICENSE_NOT_LOADED 1
|
||||
/* After the license is loaded, before a successful decrypt. */
|
||||
#define ODK_CLOCK_TIMER_STATUS_LICENSE_LOADED 2
|
||||
/* After the license is loaded, if a renewal has also been loaded. */
|
||||
#define ODK_CLOCK_TIMER_STATUS_RENEWAL_LOADED 3
|
||||
/* The first decrypt has occurred and the timer is active. */
|
||||
#define ODK_CLOCK_TIMER_STATUS_ACTIVE 4
|
||||
/* The first decrypt has occurred and the timer is unlimited. */
|
||||
#define ODK_CLOCK_TIMER_STATUS_UNLIMITED 5
|
||||
/* The timer has transitioned from active to expired. */
|
||||
#define ODK_CLOCK_TIMER_STATUS_EXPIRED 6
|
||||
/* The license has been marked as inactive. */
|
||||
#define ODK_CLOCK_TIMER_STATUS_LICENSE_INACTIVE 7
|
||||
|
||||
/* A helper function for computing timer limits when a renewal is loaded. */
|
||||
OEMCryptoResult ODK_ComputeRenewalDuration(const ODK_TimerLimits* timer_limits,
|
||||
ODK_ClockValues* clock_values,
|
||||
uint64_t system_time_seconds,
|
||||
uint64_t new_renewal_duration,
|
||||
uint64_t* timer_value);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* WIDEVINE_ODK_SRC_ODK_STRUCTS_PRIV_H_ */
|
||||
502
oemcrypto/odk/src/odk_timer.c
Normal file
502
oemcrypto/odk/src/odk_timer.c
Normal file
@@ -0,0 +1,502 @@
|
||||
/* Copyright 2019 Google LLC. All rights reserved. This file and proprietary */
|
||||
/* source code may only be used and distributed under the Widevine Master */
|
||||
/* License Agreement. */
|
||||
|
||||
#include <stdint.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "odk.h"
|
||||
#include "odk_overflow.h"
|
||||
#include "odk_structs_priv.h"
|
||||
|
||||
/* Private function. Checks to see if the license is active. Returns
|
||||
* ODK_TIMER_EXPIRED if the license is valid but inactive. Returns
|
||||
* OEMCrypto_SUCCESS if the license is active. Returns
|
||||
* OEMCrypto_ERROR_UNKNOWN_FAILURE on other errors. */
|
||||
static OEMCryptoResult ODK_LicenseActive(const ODK_TimerLimits* timer_limits,
|
||||
ODK_ClockValues* clock_values) {
|
||||
/* Check some basic errors. */
|
||||
if (clock_values == NULL || timer_limits == NULL) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
/* Check if the license has not been loaded yet. */
|
||||
if (clock_values->timer_status == ODK_CLOCK_TIMER_STATUS_UNDEFINED ||
|
||||
clock_values->timer_status == ODK_CLOCK_TIMER_STATUS_LICENSE_NOT_LOADED) {
|
||||
return OEMCrypto_ERROR_UNKNOWN_FAILURE;
|
||||
}
|
||||
if (clock_values->status > kActive) {
|
||||
return ODK_TIMER_EXPIRED;
|
||||
}
|
||||
return OEMCrypto_SUCCESS;
|
||||
}
|
||||
|
||||
/* Private function. Sets the timer_value to be the min(timer_value, new_value),
|
||||
* with the convention that 0 means infinite. The convention that 0 means
|
||||
* infinite is used for all Widevine license and duration values. */
|
||||
static void ComputeMinimum(uint64_t* timer_value, uint64_t new_value) {
|
||||
if (timer_value == NULL) return;
|
||||
if (new_value > 0) {
|
||||
if (*timer_value == 0 || *timer_value > new_value) {
|
||||
*timer_value = new_value;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Private function. Check to see if the rental window restricts playback. If
|
||||
* the rental enforcement is hard, or if this is the first playback, then we
|
||||
* verify that system_time_seconds is within the rental window. If the
|
||||
* enforcement is soft and we have already started playback, then there is no
|
||||
* restriction.
|
||||
* Return ODK_TIMER_EXPIRED if out of the window.
|
||||
* Return ODK_TIMER_ACTIVE if within the window, and there is a hard limit.
|
||||
* Return ODK_DISABLE_TIMER if no there should be no limit.
|
||||
* Return other error on error.
|
||||
* Also, if this function does compute a limit, the timer_value is reduced to
|
||||
* obey that limit. If the limit is less restrictive than the current
|
||||
* timer_value, then timer_value is not changed. */
|
||||
static OEMCryptoResult ODK_CheckRentalWindow(
|
||||
const ODK_TimerLimits* timer_limits, ODK_ClockValues* clock_values,
|
||||
uint64_t system_time_seconds, uint64_t* timer_value) {
|
||||
if (clock_values == NULL || timer_limits == NULL || timer_value == NULL) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
/* If playback has already started, and rental duration enforcement is soft,
|
||||
* then there is no restriction. */
|
||||
if (clock_values->time_of_first_decrypt > 0 &&
|
||||
timer_limits->soft_enforce_rental_duration) {
|
||||
return ODK_DISABLE_TIMER;
|
||||
}
|
||||
|
||||
/* rental_clock = time since license signed. */
|
||||
uint64_t rental_clock = 0;
|
||||
if (odk_sub_overflow_u64(system_time_seconds,
|
||||
clock_values->time_of_license_signed,
|
||||
&rental_clock)) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
/* Check if it is before license is valid. This is an unusual case. First
|
||||
* playback may still work if it occurs after the rental window opens. */
|
||||
if (rental_clock < timer_limits->earliest_playback_start_seconds) {
|
||||
return ODK_TIMER_EXPIRED;
|
||||
}
|
||||
/* If the rental duration is 0, there is no limit. */
|
||||
if (timer_limits->rental_duration_seconds == 0) {
|
||||
return ODK_DISABLE_TIMER;
|
||||
}
|
||||
/* End of rental window, based on rental clock (not system time). */
|
||||
uint64_t end_of_rental_window = 0;
|
||||
if (odk_add_overflow_u64(timer_limits->earliest_playback_start_seconds,
|
||||
timer_limits->rental_duration_seconds,
|
||||
&end_of_rental_window)) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
if (end_of_rental_window <= rental_clock) {
|
||||
return ODK_TIMER_EXPIRED;
|
||||
}
|
||||
/* At this point system_time is within the rental window. */
|
||||
if (timer_limits->soft_enforce_rental_duration) {
|
||||
/* For soft enforcement, we allow playback, and do not adjust the timer. */
|
||||
return ODK_DISABLE_TIMER;
|
||||
}
|
||||
uint64_t time_left = 0;
|
||||
if (odk_sub_overflow_u64(end_of_rental_window, rental_clock, &time_left)) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
ComputeMinimum(timer_value, time_left);
|
||||
return ODK_SET_TIMER;
|
||||
}
|
||||
|
||||
/* Private function. Check to see if the playback window restricts
|
||||
* playback. This should only be called if playback has started, so that
|
||||
* clock_values->time_of_first_decrypt is nonzero.
|
||||
* Return ODK_TIMER_EXPIRED if out of the window.
|
||||
* Return ODK_SET_TIMER if within the window, and there is a hard limit.
|
||||
* Return ODK_DISABLE_TIMER if no limit.
|
||||
* Return other error on error.
|
||||
* Also, if this function does compute a limit, the timer_value is reduced to
|
||||
* obey that limit. If the limit is less restrictive than the current
|
||||
* timer_value, then timer_value is not changed. */
|
||||
static OEMCryptoResult ODK_CheckPlaybackWindow(
|
||||
const ODK_TimerLimits* timer_limits, ODK_ClockValues* clock_values,
|
||||
uint64_t system_time_seconds, uint64_t* timer_value) {
|
||||
if (clock_values == NULL || timer_limits == NULL || timer_value == NULL) {
|
||||
return OEMCrypto_ERROR_UNKNOWN_FAILURE;
|
||||
}
|
||||
/* if the playback duration is 0, there is no limit. */
|
||||
if (timer_limits->total_playback_duration_seconds == 0) {
|
||||
return ODK_DISABLE_TIMER;
|
||||
}
|
||||
uint64_t end_of_playback_window = 0;
|
||||
if (odk_add_overflow_u64(timer_limits->total_playback_duration_seconds,
|
||||
clock_values->time_of_first_decrypt,
|
||||
&end_of_playback_window)) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
if (end_of_playback_window <= system_time_seconds) {
|
||||
return ODK_TIMER_EXPIRED;
|
||||
}
|
||||
/* At this point, system_time is within the total playback window. */
|
||||
if (timer_limits->soft_enforce_playback_duration) {
|
||||
/* For soft enforcement, we allow playback, and do not adjust the timer. */
|
||||
return ODK_DISABLE_TIMER;
|
||||
}
|
||||
uint64_t time_left = 0;
|
||||
if (odk_sub_overflow_u64(end_of_playback_window, system_time_seconds,
|
||||
&time_left)) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
ComputeMinimum(timer_value, time_left);
|
||||
return ODK_SET_TIMER;
|
||||
}
|
||||
|
||||
/* Update the timer status. If playback has already started, we use the given
|
||||
* status. However, if playback has not yet started, then we expect a call to
|
||||
* ODK_AttemptFirstPlayback in the future, and we need to signal to it that we
|
||||
* have already computed the timer limit. */
|
||||
static void ODK_UpdateTimerStatusForRenewal(ODK_ClockValues* clock_values,
|
||||
uint32_t new_status) {
|
||||
if (clock_values == NULL) {
|
||||
return; /* should not happen. */
|
||||
}
|
||||
if (clock_values->timer_status == ODK_CLOCK_TIMER_STATUS_LICENSE_LOADED) {
|
||||
/* Signal that the timer is already set. */
|
||||
clock_values->timer_status = ODK_CLOCK_TIMER_STATUS_RENEWAL_LOADED;
|
||||
} else {
|
||||
clock_values->timer_status = new_status;
|
||||
}
|
||||
}
|
||||
|
||||
/* Private function, but accessed from odk.c so cannot be static. This checks to
|
||||
* see if a renewal message should restart the playback timer and sets the value
|
||||
* appropriately. */
|
||||
OEMCryptoResult ODK_ComputeRenewalDuration(const ODK_TimerLimits* timer_limits,
|
||||
ODK_ClockValues* clock_values,
|
||||
uint64_t system_time_seconds,
|
||||
uint64_t new_renewal_duration,
|
||||
uint64_t* timer_value) {
|
||||
if (timer_limits == NULL || clock_values == NULL) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT; /* should not happen. */
|
||||
}
|
||||
/* If this is before the license was signed, something is odd. Return an
|
||||
* error. */
|
||||
if (system_time_seconds < clock_values->time_of_license_signed) {
|
||||
return OEMCrypto_ERROR_UNKNOWN_FAILURE;
|
||||
}
|
||||
|
||||
const OEMCryptoResult license_status =
|
||||
ODK_LicenseActive(timer_limits, clock_values);
|
||||
/* If the license is not active, then we cannot renew the license. */
|
||||
if (license_status != OEMCrypto_SUCCESS) {
|
||||
return license_status;
|
||||
}
|
||||
|
||||
/* We start with the new renewal duration as the new timer limit. */
|
||||
uint64_t new_timer_value = new_renewal_duration;
|
||||
|
||||
/* Then we factor in the rental window restrictions. This might decrease
|
||||
* new_timer_value. */
|
||||
const OEMCryptoResult rental_status = ODK_CheckRentalWindow(
|
||||
timer_limits, clock_values, system_time_seconds, &new_timer_value);
|
||||
|
||||
/* If the rental status forbids playback, then we're done. */
|
||||
if ((rental_status != ODK_DISABLE_TIMER) &&
|
||||
(rental_status != ODK_SET_TIMER)) {
|
||||
return rental_status;
|
||||
}
|
||||
|
||||
/* If playback has already started and it has hard enforcement, then check
|
||||
* total playback window. */
|
||||
if (clock_values->time_of_first_decrypt > 0 &&
|
||||
!timer_limits->soft_enforce_playback_duration) {
|
||||
/* This might decrease new_timer_value. */
|
||||
const OEMCryptoResult playback_status = ODK_CheckPlaybackWindow(
|
||||
timer_limits, clock_values, system_time_seconds, &new_timer_value);
|
||||
/* If the timer limits forbid playback in the playback window, then we're
|
||||
* done. */
|
||||
if ((playback_status != ODK_DISABLE_TIMER) &&
|
||||
(playback_status != ODK_SET_TIMER)) {
|
||||
return playback_status;
|
||||
}
|
||||
}
|
||||
|
||||
/* If new_timer_value is infinite (represented by 0), then there are no
|
||||
* limits, so we can return now. */
|
||||
if (new_timer_value == 0) {
|
||||
clock_values->time_when_timer_expires = 0;
|
||||
ODK_UpdateTimerStatusForRenewal(clock_values,
|
||||
ODK_CLOCK_TIMER_STATUS_UNLIMITED);
|
||||
return ODK_DISABLE_TIMER;
|
||||
}
|
||||
|
||||
/* If the caller gave us a pointer to store the new timer value. Fill it. */
|
||||
if (timer_value != NULL) {
|
||||
*timer_value = new_timer_value;
|
||||
}
|
||||
if (odk_add_overflow_u64(system_time_seconds, new_timer_value,
|
||||
&clock_values->time_when_timer_expires)) {
|
||||
return OEMCrypto_ERROR_UNKNOWN_FAILURE;
|
||||
}
|
||||
ODK_UpdateTimerStatusForRenewal(clock_values, ODK_CLOCK_TIMER_STATUS_ACTIVE);
|
||||
return ODK_SET_TIMER;
|
||||
}
|
||||
|
||||
/************************************************************************/
|
||||
/************************************************************************/
|
||||
/* Public functions, declared in odk.h. */
|
||||
|
||||
/* This is called when OEMCrypto opens a new session. */
|
||||
OEMCryptoResult ODK_InitializeSessionValues(ODK_TimerLimits* timer_limits,
|
||||
ODK_ClockValues* clock_values,
|
||||
ODK_NonceValues* nonce_values,
|
||||
uint32_t api_major_version,
|
||||
uint32_t session_id) {
|
||||
if (timer_limits == NULL || clock_values == NULL || nonce_values == NULL) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
/* Check that the API version passed in from OEMCrypto matches the version of
|
||||
* this ODK library. */
|
||||
if (api_major_version != ODK_MAJOR_VERSION) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
timer_limits->soft_enforce_rental_duration = false;
|
||||
timer_limits->soft_enforce_playback_duration = false;
|
||||
timer_limits->earliest_playback_start_seconds = 0;
|
||||
timer_limits->rental_duration_seconds = 0;
|
||||
timer_limits->total_playback_duration_seconds = 0;
|
||||
timer_limits->initial_renewal_duration_seconds = 0;
|
||||
|
||||
ODK_InitializeClockValues(clock_values, 0);
|
||||
|
||||
nonce_values->api_major_version = ODK_MAJOR_VERSION;
|
||||
nonce_values->api_minor_version = ODK_MINOR_VERSION;
|
||||
nonce_values->nonce = 0;
|
||||
nonce_values->session_id = session_id;
|
||||
|
||||
return OEMCrypto_SUCCESS;
|
||||
}
|
||||
|
||||
/* This is called when OEMCrypto generates a new nonce in
|
||||
* OEMCrypto_GenerateNonce. */
|
||||
OEMCryptoResult ODK_SetNonceValues(ODK_NonceValues* nonce_values,
|
||||
uint32_t nonce) {
|
||||
if (nonce_values == NULL) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
/* Setting the nonce should only happen once per session. */
|
||||
if (nonce_values->nonce != 0) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
nonce_values->nonce = nonce;
|
||||
return OEMCrypto_SUCCESS;
|
||||
}
|
||||
|
||||
/* This is called when OEMCrypto signs a license. */
|
||||
OEMCryptoResult ODK_InitializeClockValues(ODK_ClockValues* clock_values,
|
||||
uint64_t system_time_seconds) {
|
||||
if (clock_values == NULL) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
clock_values->time_of_license_signed = system_time_seconds;
|
||||
clock_values->time_of_first_decrypt = 0;
|
||||
clock_values->time_of_last_decrypt = 0;
|
||||
clock_values->time_when_timer_expires = 0;
|
||||
clock_values->timer_status = ODK_CLOCK_TIMER_STATUS_LICENSE_NOT_LOADED;
|
||||
clock_values->status = kUnused;
|
||||
return OEMCrypto_SUCCESS;
|
||||
}
|
||||
|
||||
/* This is called when OEMCrypto reloads a usage entry. */
|
||||
OEMCryptoResult ODK_ReloadClockValues(ODK_ClockValues* clock_values,
|
||||
uint64_t time_of_license_signed,
|
||||
uint64_t time_of_first_decrypt,
|
||||
uint64_t time_of_last_decrypt,
|
||||
enum OEMCrypto_Usage_Entry_Status status,
|
||||
uint64_t system_time_seconds) {
|
||||
if (clock_values == NULL) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
clock_values->time_of_license_signed = time_of_license_signed;
|
||||
clock_values->time_of_first_decrypt = time_of_first_decrypt;
|
||||
clock_values->time_of_last_decrypt = time_of_last_decrypt;
|
||||
clock_values->time_when_timer_expires = 0;
|
||||
clock_values->timer_status = ODK_CLOCK_TIMER_STATUS_LICENSE_NOT_LOADED;
|
||||
clock_values->status = status;
|
||||
return OEMCrypto_SUCCESS;
|
||||
}
|
||||
|
||||
/* This is called on the first playback for a session. */
|
||||
OEMCryptoResult ODK_AttemptFirstPlayback(uint64_t system_time_seconds,
|
||||
const ODK_TimerLimits* timer_limits,
|
||||
ODK_ClockValues* clock_values,
|
||||
uint64_t* timer_value) {
|
||||
if (clock_values == NULL || timer_limits == NULL) {
|
||||
return OEMCrypto_ERROR_UNKNOWN_FAILURE;
|
||||
}
|
||||
/* All times are relative to when the license was signed. */
|
||||
uint64_t rental_time = 0;
|
||||
if (odk_sub_overflow_u64(system_time_seconds,
|
||||
clock_values->time_of_license_signed,
|
||||
&rental_time)) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
if (rental_time < timer_limits->earliest_playback_start_seconds) {
|
||||
clock_values->timer_status = ODK_TIMER_EXPIRED;
|
||||
return ODK_TIMER_EXPIRED;
|
||||
}
|
||||
/* If the license is inactive or not loaded, then playback is not allowed. */
|
||||
OEMCryptoResult status = ODK_LicenseActive(timer_limits, clock_values);
|
||||
if (status != OEMCrypto_SUCCESS) {
|
||||
return status;
|
||||
}
|
||||
|
||||
/* We start with the initial renewal duration as the timer limit. */
|
||||
uint64_t new_timer_value = timer_limits->initial_renewal_duration_seconds;
|
||||
/* However, if a renewal was loaded before this first playback, use the
|
||||
* previously computed limit. */
|
||||
if (clock_values->timer_status == ODK_CLOCK_TIMER_STATUS_RENEWAL_LOADED) {
|
||||
if (clock_values->time_when_timer_expires <= system_time_seconds) {
|
||||
return ODK_TIMER_EXPIRED;
|
||||
}
|
||||
if (odk_sub_overflow_u64(clock_values->time_when_timer_expires,
|
||||
system_time_seconds, &new_timer_value)) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
}
|
||||
|
||||
/* Then we factor in the rental window restrictions. This might decrease
|
||||
* new_timer_value. */
|
||||
status = ODK_CheckRentalWindow(timer_limits, clock_values,
|
||||
system_time_seconds, &new_timer_value);
|
||||
if ((status != ODK_DISABLE_TIMER) && (status != ODK_SET_TIMER)) {
|
||||
return status;
|
||||
}
|
||||
|
||||
/* If playback has not already started, then this is the first playback. */
|
||||
if (clock_values->time_of_first_decrypt == 0) {
|
||||
clock_values->time_of_first_decrypt = system_time_seconds;
|
||||
clock_values->status = kActive;
|
||||
}
|
||||
|
||||
/* Similar to the rental window, we check the playback window
|
||||
* restrictions. This might decrease new_timer_value. */
|
||||
status = ODK_CheckPlaybackWindow(timer_limits, clock_values,
|
||||
system_time_seconds, &new_timer_value);
|
||||
if ((status != ODK_DISABLE_TIMER) && (status != ODK_SET_TIMER)) {
|
||||
return status;
|
||||
}
|
||||
|
||||
/* We know we are allowed to decrypt. The rest computes the timer duration. */
|
||||
clock_values->time_of_last_decrypt = system_time_seconds;
|
||||
|
||||
/* If new_timer_value is infinite (represented by 0), then there are no
|
||||
* limits, so we can return now. */
|
||||
if (new_timer_value == 0) {
|
||||
clock_values->time_when_timer_expires = 0;
|
||||
clock_values->timer_status = ODK_CLOCK_TIMER_STATUS_UNLIMITED;
|
||||
return ODK_DISABLE_TIMER;
|
||||
}
|
||||
/* If the caller gave us a pointer to store the new timer value. Fill it. */
|
||||
if (timer_value) {
|
||||
*timer_value = new_timer_value;
|
||||
}
|
||||
if (odk_add_overflow_u64(system_time_seconds, new_timer_value,
|
||||
&clock_values->time_when_timer_expires)) {
|
||||
return OEMCrypto_ERROR_UNKNOWN_FAILURE;
|
||||
}
|
||||
clock_values->timer_status = ODK_CLOCK_TIMER_STATUS_ACTIVE;
|
||||
return ODK_SET_TIMER;
|
||||
}
|
||||
|
||||
/* This is called regularly during playback if OEMCrypto does not implement its
|
||||
* own timer. */
|
||||
OEMCryptoResult ODK_UpdateLastPlaybackTime(uint64_t system_time_seconds,
|
||||
const ODK_TimerLimits* timer_limits,
|
||||
ODK_ClockValues* clock_values) {
|
||||
OEMCryptoResult status = ODK_LicenseActive(timer_limits, clock_values);
|
||||
if (status != OEMCrypto_SUCCESS) {
|
||||
return status;
|
||||
}
|
||||
switch (clock_values->timer_status) {
|
||||
case ODK_CLOCK_TIMER_STATUS_UNLIMITED:
|
||||
break;
|
||||
case ODK_CLOCK_TIMER_STATUS_ACTIVE:
|
||||
/* Note: we allow playback at the time when the timer expires, but not
|
||||
* after. This is not important for business cases, but it makes it
|
||||
* easier to write tests. */
|
||||
if (clock_values->time_when_timer_expires > 0 &&
|
||||
system_time_seconds > clock_values->time_when_timer_expires) {
|
||||
clock_values->timer_status = ODK_CLOCK_TIMER_STATUS_EXPIRED;
|
||||
return ODK_TIMER_EXPIRED;
|
||||
}
|
||||
break;
|
||||
default: /* Expired, error state, or never started. */
|
||||
return ODK_TIMER_EXPIRED;
|
||||
}
|
||||
clock_values->time_of_last_decrypt = system_time_seconds;
|
||||
return OEMCrypto_SUCCESS;
|
||||
}
|
||||
|
||||
/* This is called from OEMCrypto_DeactivateUsageEntry. */
|
||||
OEMCryptoResult ODK_DeactivateUsageEntry(ODK_ClockValues* clock_values) {
|
||||
if (clock_values == NULL) {
|
||||
return OEMCrypto_ERROR_UNKNOWN_FAILURE;
|
||||
}
|
||||
if (clock_values->status == kUnused) {
|
||||
clock_values->status = kInactiveUnused;
|
||||
} else if (clock_values->status == kActive) {
|
||||
clock_values->status = kInactiveUsed;
|
||||
}
|
||||
clock_values->timer_status = ODK_CLOCK_TIMER_STATUS_LICENSE_INACTIVE;
|
||||
return OEMCrypto_SUCCESS;
|
||||
}
|
||||
|
||||
/* This is called when OEMCrypto loads a legacy v15 license, from
|
||||
* OEMCrypto_LoadKeys. */
|
||||
OEMCryptoResult ODK_InitializeV15Values(ODK_TimerLimits* timer_limits,
|
||||
ODK_ClockValues* clock_values,
|
||||
ODK_NonceValues* nonce_values,
|
||||
uint32_t key_duration,
|
||||
uint64_t system_time_seconds) {
|
||||
if (timer_limits == NULL || clock_values == NULL || nonce_values == NULL) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
timer_limits->soft_enforce_playback_duration = false;
|
||||
timer_limits->soft_enforce_rental_duration = false;
|
||||
timer_limits->earliest_playback_start_seconds = 0;
|
||||
timer_limits->rental_duration_seconds = 0;
|
||||
timer_limits->total_playback_duration_seconds = 0;
|
||||
timer_limits->initial_renewal_duration_seconds = key_duration;
|
||||
|
||||
nonce_values->api_major_version = 15;
|
||||
nonce_values->api_minor_version = 0;
|
||||
if (key_duration > 0) {
|
||||
clock_values->time_when_timer_expires = system_time_seconds + key_duration;
|
||||
} else {
|
||||
clock_values->time_when_timer_expires = 0;
|
||||
}
|
||||
clock_values->timer_status = ODK_CLOCK_TIMER_STATUS_LICENSE_LOADED;
|
||||
return OEMCrypto_SUCCESS;
|
||||
}
|
||||
|
||||
/* This is called when OEMCrypto loads a legacy license renewal in
|
||||
* OEMCrypto_RefreshKeys. */
|
||||
OEMCryptoResult ODK_RefreshV15Values(const ODK_TimerLimits* timer_limits,
|
||||
ODK_ClockValues* clock_values,
|
||||
const ODK_NonceValues* nonce_values,
|
||||
uint64_t system_time_seconds,
|
||||
uint32_t new_key_duration,
|
||||
uint64_t* timer_value) {
|
||||
if (timer_limits == NULL || clock_values == NULL || nonce_values == NULL) {
|
||||
return OEMCrypto_ERROR_INVALID_CONTEXT;
|
||||
}
|
||||
if (nonce_values->api_major_version != 15) {
|
||||
return OEMCrypto_ERROR_INVALID_NONCE;
|
||||
}
|
||||
if (clock_values->status > kActive) {
|
||||
clock_values->timer_status = ODK_CLOCK_TIMER_STATUS_LICENSE_INACTIVE;
|
||||
return ODK_TIMER_EXPIRED;
|
||||
}
|
||||
return ODK_ComputeRenewalDuration(timer_limits, clock_values,
|
||||
system_time_seconds, new_key_duration,
|
||||
timer_value);
|
||||
}
|
||||
34
oemcrypto/odk/src/odk_util.c
Normal file
34
oemcrypto/odk/src/odk_util.c
Normal file
@@ -0,0 +1,34 @@
|
||||
/* Copyright 2019 Google LLC. All rights reserved. This file and proprietary */
|
||||
/* source code may only be used and distributed under the Widevine Master */
|
||||
/* License Agreement. */
|
||||
|
||||
#include "odk_util.h"
|
||||
|
||||
int crypto_memcmp(const void* in_a, const void* in_b, size_t len) {
|
||||
if (len == 0) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Only valid pointers are allowed. */
|
||||
if (in_a == NULL || in_b == NULL) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
const uint8_t* a = (const uint8_t*)in_a;
|
||||
const uint8_t* b = (const uint8_t*)in_b;
|
||||
uint8_t x = 0;
|
||||
|
||||
for (size_t i = 0; i < len; i++) {
|
||||
x |= a[i] ^ b[i];
|
||||
}
|
||||
return x;
|
||||
}
|
||||
|
||||
bool ODK_NonceValuesEqual(const ODK_NonceValues* a, const ODK_NonceValues* b) {
|
||||
if (a == NULL || b == NULL) {
|
||||
return (a == b);
|
||||
}
|
||||
return (a->api_major_version == b->api_major_version &&
|
||||
a->api_minor_version == b->api_minor_version &&
|
||||
a->nonce == b->nonce && a->session_id == b->session_id);
|
||||
}
|
||||
28
oemcrypto/odk/src/odk_util.h
Normal file
28
oemcrypto/odk/src/odk_util.h
Normal file
@@ -0,0 +1,28 @@
|
||||
/* Copyright 2019 Google LLC. All rights reserved. This file and proprietary */
|
||||
/* source code may only be used and distributed under the Widevine Master */
|
||||
/* License Agreement. */
|
||||
|
||||
#ifndef WIDEVINE_ODK_SRC_ODK_UTIL_H_
|
||||
#define WIDEVINE_ODK_SRC_ODK_UTIL_H_
|
||||
|
||||
#include <stddef.h>
|
||||
#include <stdint.h>
|
||||
|
||||
#include "odk_structs.h"
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
/* crypto_memcmp returns zero iff the |len| bytes at |a| and |b| are equal. It
|
||||
* takes an amount of time dependent on |len|, but independent of the contents
|
||||
* of |a| and |b|. Unlike memcmp, it cannot be used to order elements as the
|
||||
* return value when a != b is undefined, other than being non-zero. */
|
||||
int crypto_memcmp(const void* a, const void* b, size_t len);
|
||||
|
||||
bool ODK_NonceValuesEqual(const ODK_NonceValues* a, const ODK_NonceValues* b);
|
||||
|
||||
#ifdef __cplusplus
|
||||
} /* extern "C" */
|
||||
#endif
|
||||
#endif /* WIDEVINE_ODK_SRC_ODK_UTIL_H_ */
|
||||
259
oemcrypto/odk/src/serialization_base.c
Normal file
259
oemcrypto/odk/src/serialization_base.c
Normal file
@@ -0,0 +1,259 @@
|
||||
/* Copyright 2019 Google LLC. All rights reserved. This file and proprietary */
|
||||
/* source code may only be used and distributed under the Widevine Master */
|
||||
/* License Agreement. */
|
||||
|
||||
#include "serialization_base.h"
|
||||
|
||||
#include <stddef.h>
|
||||
#include <stdint.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "OEMCryptoCENCCommon.h"
|
||||
#include "odk_assert.h"
|
||||
#include "odk_overflow.h"
|
||||
|
||||
struct _Message {
|
||||
uint8_t* base;
|
||||
size_t capacity;
|
||||
size_t size; /* bytes written */
|
||||
size_t read_offset; /* bytes read */
|
||||
MessageStatus status;
|
||||
};
|
||||
|
||||
/* TODO(b/150776214): this can be removed once AllocateMessage gets cleaned up
|
||||
*/
|
||||
/*
|
||||
* odk_static_assert(SIZE_OF_MESSAGE_STRUCT >= sizeof(struct _Message),
|
||||
* "SIZE_OF_MESSAGE_STRUCT too small");
|
||||
*/
|
||||
|
||||
bool ValidMessage(Message* message) {
|
||||
if (message == NULL) {
|
||||
return false;
|
||||
}
|
||||
if (message->status != MESSAGE_STATUS_OK) {
|
||||
return false;
|
||||
}
|
||||
if (message->base == NULL) {
|
||||
message->status = MESSAGE_STATUS_NULL_POINTER_ERROR;
|
||||
return false;
|
||||
}
|
||||
if (message->size > message->capacity ||
|
||||
message->read_offset > message->size) {
|
||||
message->status = MESSAGE_STATUS_OVERFLOW_ERROR;
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
static void PackBytes(Message* message, const uint8_t* ptr, size_t count) {
|
||||
if (count <= message->capacity - message->size) {
|
||||
memcpy((void*)(message->base + message->size), (void*)ptr, count);
|
||||
message->size += count;
|
||||
} else {
|
||||
message->status = MESSAGE_STATUS_OVERFLOW_ERROR;
|
||||
}
|
||||
}
|
||||
|
||||
void Pack_enum(Message* message, int value) {
|
||||
uint32_t v32 = value;
|
||||
Pack_uint32_t(message, &v32);
|
||||
}
|
||||
|
||||
void Pack_bool(Message* message, const bool* value) {
|
||||
if (!ValidMessage(message)) return;
|
||||
uint8_t data[4] = {0};
|
||||
data[3] = *value ? 1 : 0;
|
||||
PackBytes(message, data, sizeof(data));
|
||||
}
|
||||
|
||||
void Pack_uint16_t(Message* message, const uint16_t* value) {
|
||||
if (!ValidMessage(message)) return;
|
||||
uint8_t data[2] = {0};
|
||||
data[0] = *value >> 8;
|
||||
data[1] = *value >> 0;
|
||||
PackBytes(message, data, sizeof(data));
|
||||
}
|
||||
|
||||
void Pack_uint32_t(Message* message, const uint32_t* value) {
|
||||
if (!ValidMessage(message)) return;
|
||||
uint8_t data[4] = {0};
|
||||
data[0] = *value >> 24;
|
||||
data[1] = *value >> 16;
|
||||
data[2] = *value >> 8;
|
||||
data[3] = *value >> 0;
|
||||
PackBytes(message, data, sizeof(data));
|
||||
}
|
||||
|
||||
void Pack_uint64_t(Message* message, const uint64_t* value) {
|
||||
if (!ValidMessage(message)) return;
|
||||
uint32_t hi = *value >> 32;
|
||||
uint32_t lo = *value;
|
||||
Pack_uint32_t(message, &hi);
|
||||
Pack_uint32_t(message, &lo);
|
||||
}
|
||||
|
||||
void PackArray(Message* message, const uint8_t* base, size_t size) {
|
||||
if (!ValidMessage(message)) return;
|
||||
PackBytes(message, base, size);
|
||||
}
|
||||
|
||||
void Pack_OEMCrypto_Substring(Message* msg, const OEMCrypto_Substring* obj) {
|
||||
uint32_t offset = obj->offset;
|
||||
uint32_t length = obj->length;
|
||||
Pack_uint32_t(msg, &offset);
|
||||
Pack_uint32_t(msg, &length);
|
||||
}
|
||||
|
||||
static void UnpackBytes(Message* message, uint8_t* ptr, size_t count) {
|
||||
if (count <= message->size - message->read_offset) {
|
||||
memcpy((void*)ptr, (void*)(message->base + message->read_offset), count);
|
||||
message->read_offset += count;
|
||||
} else {
|
||||
message->status = MESSAGE_STATUS_UNDERFLOW_ERROR;
|
||||
}
|
||||
}
|
||||
|
||||
int Unpack_enum(Message* message) {
|
||||
uint32_t v32;
|
||||
Unpack_uint32_t(message, &v32);
|
||||
return v32;
|
||||
}
|
||||
|
||||
void Unpack_bool(Message* message, bool* value) {
|
||||
if (!ValidMessage(message)) return;
|
||||
uint8_t data[4] = {0};
|
||||
UnpackBytes(message, data, sizeof(data));
|
||||
*value = (0 != data[3]);
|
||||
}
|
||||
|
||||
void Unpack_uint16_t(Message* message, uint16_t* value) {
|
||||
if (!ValidMessage(message)) return;
|
||||
uint8_t data[2] = {0};
|
||||
UnpackBytes(message, data, sizeof(data));
|
||||
*value = data[0];
|
||||
*value = *value << 8 | data[1];
|
||||
}
|
||||
|
||||
void Unpack_uint32_t(Message* message, uint32_t* value) {
|
||||
if (!ValidMessage(message)) return;
|
||||
uint8_t data[4] = {0};
|
||||
UnpackBytes(message, data, sizeof(data));
|
||||
*value = data[0];
|
||||
*value = *value << 8 | data[1];
|
||||
*value = *value << 8 | data[2];
|
||||
*value = *value << 8 | data[3];
|
||||
}
|
||||
|
||||
void Unpack_uint64_t(Message* message, uint64_t* value) {
|
||||
if (!ValidMessage(message)) return;
|
||||
uint32_t hi = 0;
|
||||
uint32_t lo = 0;
|
||||
Unpack_uint32_t(message, &hi);
|
||||
Unpack_uint32_t(message, &lo);
|
||||
*value = hi;
|
||||
*value = *value << 32 | lo;
|
||||
}
|
||||
|
||||
void Unpack_OEMCrypto_Substring(Message* msg, OEMCrypto_Substring* obj) {
|
||||
uint32_t offset = 0, length = 0;
|
||||
Unpack_uint32_t(msg, &offset);
|
||||
Unpack_uint32_t(msg, &length);
|
||||
if (!ValidMessage(msg)) return;
|
||||
/* Each substring should be contained within the message body, which is in the
|
||||
* total message, just after the core message. The offset of a substring is
|
||||
* relative to the message body. So we need to verify:
|
||||
* 0 < offset and offset + length < message->capacity - message->size
|
||||
* or offset + length + message->size < message->capacity
|
||||
*/
|
||||
size_t substring_end = 0; /* = offset + length; */
|
||||
size_t end = 0; /* = substring_end + message->size; */
|
||||
if (odk_add_overflow_ux(offset, length, &substring_end) ||
|
||||
odk_add_overflow_ux(substring_end, msg->size, &end) ||
|
||||
end > msg->capacity) {
|
||||
msg->status = MESSAGE_STATUS_OVERFLOW_ERROR;
|
||||
return;
|
||||
}
|
||||
obj->offset = offset;
|
||||
obj->length = length;
|
||||
}
|
||||
|
||||
/* copy out */
|
||||
void UnpackArray(Message* message, uint8_t* address, size_t size) {
|
||||
if (!ValidMessage(message)) return;
|
||||
UnpackBytes(message, address, size);
|
||||
}
|
||||
|
||||
/*
|
||||
* The message structure, which is separate from the buffer,
|
||||
* is initialized to reference the buffer
|
||||
*/
|
||||
void InitMessage(Message* message, uint8_t* buffer, size_t capacity) {
|
||||
if (message == NULL) return;
|
||||
memset(message, 0, sizeof(Message));
|
||||
message->base = buffer;
|
||||
message->capacity = capacity;
|
||||
message->size = 0;
|
||||
message->read_offset = 0;
|
||||
message->status = MESSAGE_STATUS_OK;
|
||||
}
|
||||
|
||||
/*
|
||||
* The message structure is in the first sizeof(Memory) bytes
|
||||
* of the buffer
|
||||
*/
|
||||
Message* CreateMessage(uint8_t* buffer, size_t buffer_size) {
|
||||
if (buffer == NULL || buffer_size < sizeof(Message)) return NULL;
|
||||
Message* message = (Message*)buffer;
|
||||
message->base = buffer + sizeof(Message);
|
||||
message->capacity = buffer_size - sizeof(Message);
|
||||
message->size = 0;
|
||||
message->read_offset = 0;
|
||||
message->status = MESSAGE_STATUS_OK;
|
||||
return message;
|
||||
}
|
||||
|
||||
/*
|
||||
* Set the message to an empty state
|
||||
*/
|
||||
void ResetMessage(Message* message) {
|
||||
message->size = 0;
|
||||
message->read_offset = 0;
|
||||
message->status = MESSAGE_STATUS_OK;
|
||||
}
|
||||
|
||||
uint8_t* GetBase(Message* message) {
|
||||
if (message == NULL) return NULL;
|
||||
return message->base;
|
||||
}
|
||||
|
||||
size_t GetCapacity(Message* message) {
|
||||
if (message == NULL) return 0;
|
||||
return message->capacity;
|
||||
}
|
||||
|
||||
size_t GetSize(Message* message) {
|
||||
if (message == NULL) return 0;
|
||||
return message->size;
|
||||
}
|
||||
|
||||
void SetSize(Message* message, size_t size) {
|
||||
if (message == NULL) return;
|
||||
if (size > message->capacity)
|
||||
message->status = MESSAGE_STATUS_OVERFLOW_ERROR;
|
||||
else
|
||||
message->size = size;
|
||||
}
|
||||
|
||||
MessageStatus GetStatus(Message* message) { return message->status; }
|
||||
|
||||
void SetStatus(Message* message, MessageStatus status) {
|
||||
message->status = status;
|
||||
}
|
||||
|
||||
size_t GetOffset(Message* message) {
|
||||
if (message == NULL) return 0;
|
||||
return message->read_offset;
|
||||
}
|
||||
|
||||
size_t SizeOfMessageStruct() { return sizeof(Message); }
|
||||
96
oemcrypto/odk/src/serialization_base.h
Normal file
96
oemcrypto/odk/src/serialization_base.h
Normal file
@@ -0,0 +1,96 @@
|
||||
/* Copyright 2019 Google LLC. All rights reserved. This file and proprietary */
|
||||
/* source code may only be used and distributed under the Widevine Master */
|
||||
/* License Agreement. */
|
||||
|
||||
#ifndef WIDEVINE_ODK_SRC_SERIALIZATION_BASE_H_
|
||||
#define WIDEVINE_ODK_SRC_SERIALIZATION_BASE_H_
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
#include <stddef.h>
|
||||
#include <stdint.h>
|
||||
|
||||
#include "OEMCryptoCENCCommon.h"
|
||||
|
||||
#define SIZE_OF_MESSAGE_STRUCT 64
|
||||
|
||||
/*
|
||||
* Description:
|
||||
* Point |msg| to stack-array |blk|.
|
||||
* |blk| is guaranteed large enough to hold a |Message| struct.
|
||||
* |blk| cannot be used in the same scope as a variable name.
|
||||
* |msg| points to valid memory in the same scope |AllocateMessage| is used.
|
||||
* Parameters:
|
||||
* msg: pointer to pointer to |Message| struct
|
||||
* blk: variable name for stack-array
|
||||
*/
|
||||
#define AllocateMessage(msg, blk) \
|
||||
uint8_t blk[SIZE_OF_MESSAGE_STRUCT]; \
|
||||
*(msg) = (Message*)(blk)
|
||||
|
||||
typedef struct _Message Message;
|
||||
|
||||
typedef enum {
|
||||
MESSAGE_STATUS_OK,
|
||||
MESSAGE_STATUS_UNKNOWN_ERROR,
|
||||
MESSAGE_STATUS_OVERFLOW_ERROR,
|
||||
MESSAGE_STATUS_UNDERFLOW_ERROR,
|
||||
MESSAGE_STATUS_PARSE_ERROR,
|
||||
MESSAGE_STATUS_NULL_POINTER_ERROR,
|
||||
MESSAGE_STATUS_API_VALUE_ERROR
|
||||
} MessageStatus;
|
||||
|
||||
bool ValidMessage(Message* message);
|
||||
|
||||
void Pack_enum(Message* message, int value);
|
||||
void Pack_bool(Message* message, const bool* value);
|
||||
void Pack_uint16_t(Message* message, const uint16_t* value);
|
||||
void Pack_uint32_t(Message* message, const uint32_t* value);
|
||||
void Pack_uint64_t(Message* message, const uint64_t* value);
|
||||
void PackArray(Message* message, const uint8_t* base, size_t size);
|
||||
void Pack_OEMCrypto_Substring(Message* msg, const OEMCrypto_Substring* obj);
|
||||
|
||||
int Unpack_enum(Message* message);
|
||||
void Unpack_bool(Message* message, bool* value);
|
||||
void Unpack_uint16_t(Message* message, uint16_t* value);
|
||||
void Unpack_uint32_t(Message* message, uint32_t* value);
|
||||
void Unpack_uint64_t(Message* message, uint64_t* value);
|
||||
void UnpackArray(Message* message, uint8_t* address,
|
||||
size_t size); /* copy out */
|
||||
void Unpack_OEMCrypto_Substring(Message* msg, OEMCrypto_Substring* obj);
|
||||
|
||||
/*
|
||||
* Create a message from a buffer. The message structure consumes the first
|
||||
* sizeof(Message) bytes of the buffer. The caller is responsible for ensuring
|
||||
* that the buffer remains allocated for the lifetime of the message.
|
||||
*/
|
||||
Message* CreateMessage(uint8_t* buffer, size_t buffer_size);
|
||||
|
||||
/*
|
||||
* Initialize a message structure to reference a separate buffer. The caller
|
||||
* is responsible for ensuring that the buffer remains allocated for the
|
||||
* lifetime of the message.
|
||||
*/
|
||||
void InitMessage(Message* message, uint8_t* buffer, size_t capacity);
|
||||
|
||||
/*
|
||||
* Reset an existing the message to an empty state
|
||||
*/
|
||||
void ResetMessage(Message* message);
|
||||
uint8_t* GetBase(Message* message);
|
||||
size_t GetCapacity(Message* message);
|
||||
size_t GetSize(Message* message);
|
||||
void SetSize(Message* message, size_t size);
|
||||
MessageStatus GetStatus(Message* message);
|
||||
void SetStatus(Message* message, MessageStatus status);
|
||||
size_t GetOffset(Message* message);
|
||||
|
||||
size_t SizeOfMessageStruct();
|
||||
|
||||
#ifdef __cplusplus
|
||||
} /* extern "C" */
|
||||
#endif
|
||||
|
||||
#endif /* WIDEVINE_ODK_SRC_SERIALIZATION_BASE_H_ */
|
||||
Reference in New Issue
Block a user