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Merge "Get System ID From OEM Cert" into oc-mr1-dev

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This commit is contained in:
John Bruce
2017-08-07 23:50:21 +00:00
committed by Android (Google) Code Review
parent 0e52773ff7 4d448d8165
commit 6dad75e395
7 changed files with 404 additions and 22 deletions
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1
libwvdrmengine/build_and_run_all_unit_tests.sh
View File

@@ -81,6 +81,7 @@ try_adb_push cdm_engine_test
try_adb_push cdm_feature_test try_adb_push cdm_feature_test
try_adb_push cdm_extended_duration_test try_adb_push cdm_extended_duration_test
try_adb_push cdm_session_unittest try_adb_push cdm_session_unittest
try_adb_push crypto_session_unittest
try_adb_push device_files_unittest try_adb_push device_files_unittest
try_adb_push distribution_test try_adb_push distribution_test
try_adb_push event_metric_test try_adb_push event_metric_test

4
libwvdrmengine/cdm/core/include/crypto_session.h
View File

@@ -169,11 +169,15 @@ class CryptoSession {
const std::string& provider_session_token); const std::string& provider_session_token);
private: private:
friend class CryptoSessionForTest;
bool GetProvisioningMethod(CdmClientTokenType* token_type); bool GetProvisioningMethod(CdmClientTokenType* token_type);
void Init(); void Init();
void Terminate(); void Terminate();
bool GetTokenFromKeybox(std::string* token); bool GetTokenFromKeybox(std::string* token);
bool GetTokenFromOemCert(std::string* token); bool GetTokenFromOemCert(std::string* token);
static bool ExtractSystemIdFromOemCert(const std::string& oem_cert,
uint32_t* system_id);
void GenerateMacContext(const std::string& input_context, void GenerateMacContext(const std::string& input_context,
std::string* deriv_context); std::string* deriv_context);
void GenerateEncryptContext(const std::string& input_context, void GenerateEncryptContext(const std::string& input_context,

131
libwvdrmengine/cdm/core/src/crypto_session.cpp
View File

@@ -7,12 +7,15 @@
#include <arpa/inet.h> // needed for ntoh() #include <arpa/inet.h> // needed for ntoh()
#include <string.h> #include <string.h>
#include <iostream>
#include <algorithm> #include <algorithm>
#include <iostream>
#include <memory>
#include "crypto_key.h" #include "crypto_key.h"
#include "log.h" #include "log.h"
#include "openssl/asn1.h"
#include "openssl/sha.h" #include "openssl/sha.h"
#include "openssl/x509v3.h"
#include "properties.h" #include "properties.h"
#include "pst_report.h" #include "pst_report.h"
#include "string_conversions.h" #include "string_conversions.h"
@@ -33,6 +36,15 @@ const uint32_t kRsaSignatureLength = 256;
const size_t kMaximumChunkSize = 100 * 1024; // 100 KiB const size_t kMaximumChunkSize = 100 * 1024; // 100 KiB
const size_t kEstimatedInitialUsageTableHeader = 40; const size_t kEstimatedInitialUsageTableHeader = 40;
const size_t kOemCryptoApiVersionSupportsBigUsageTables = 13; const size_t kOemCryptoApiVersionSupportsBigUsageTables = 13;
// Constants and utility objects relating to OEM Certificates
const int kExtensionOidSize = 64;
const char* const kWidevineSystemIdExtensionOid = "1.3.6.1.4.1.11129.4.1.1";
struct X509StackDeleter {
void operator()(STACK_OF(X509)* stack) {
sk_X509_pop_free(stack, X509_free);
}
};
} }
namespace wvcdm { namespace wvcdm {
@@ -359,14 +371,16 @@ bool CryptoSession::GetSystemId(uint32_t* system_id) {
return false; return false;
} }
uint8_t buf[KEYBOX_KEY_DATA_SIZE];
size_t buf_size = sizeof(buf);
LOGV("CryptoSession::GetSystemId: Lock"); LOGV("CryptoSession::GetSystemId: Lock");
AutoLock auto_lock(crypto_lock_); AutoLock auto_lock(crypto_lock_);
if (!initialized_) { if (!initialized_) {
return false; return false;
} }
if (pre_provision_token_type_ == kClientTokenKeybox) {
uint8_t buf[KEYBOX_KEY_DATA_SIZE];
size_t buf_size = sizeof(buf);
OEMCryptoResult sts; OEMCryptoResult sts;
M_TIME( M_TIME(
sts = OEMCrypto_GetKeyData( sts = OEMCrypto_GetKeyData(
@@ -380,6 +394,8 @@ bool CryptoSession::GetSystemId(uint32_t* system_id) {
requested_security_level_); requested_security_level_);
if (OEMCrypto_SUCCESS != sts) { if (OEMCrypto_SUCCESS != sts) {
LOGE("CryptoSession::GetSystemId: OEMCrypto_GetKeyData failed with %d",
sts);
return false; return false;
} }
@@ -389,7 +405,114 @@ bool CryptoSession::GetSystemId(uint32_t* system_id) {
*system_id = ntohl(*id); *system_id = ntohl(*id);
return true; return true;
} else if (pre_provision_token_type_ == kClientTokenOemCert) {
// Get the OEM Cert
std::string oem_cert;
if (GetTokenFromOemCert(&oem_cert)) {
return ExtractSystemIdFromOemCert(oem_cert, system_id);
} else {
return false;
} }
} else {
LOGE("CryptoSession::GetSystemId: Unsupported pre-provision token type %d",
pre_provision_token_type_);
return false;
}
}
bool CryptoSession::ExtractSystemIdFromOemCert(const std::string& oem_cert,
uint32_t* system_id) {
// Parse the OEM Cert chain into an OpenSSL X509 Stack
const std::unique_ptr<STACK_OF(X509), X509StackDeleter>
x509_stack(sk_X509_new_null());
if (!x509_stack) {
LOGE("CryptoSession::GetSystemId: Unable to allocate X509 Stack.");
return false;
}
CBS pkcs7;
CBS_init(&pkcs7, reinterpret_cast<const uint8_t*>(oem_cert.data()),
oem_cert.size());
if (!PKCS7_get_certificates(x509_stack.get(), &pkcs7)) {
LOGE("CryptoSession::GetSystemId: Error getting certificate chain.");
return false;
}
// Get the Widevine intermediate cert from the stack
if (sk_X509_num(x509_stack.get()) != 2) {
LOGE("CryptoSession::GetSystemId: Expected 2 certificates in chain, got %d",
sk_X509_num(x509_stack.get()));
return false;
}
X509* const intermediate_cert = sk_X509_value(x509_stack.get(), 1);
if (!intermediate_cert) {
LOGE("CryptoSession::GetSystemId: Unable to get intermediate cert.");
return false;
}
// Find the Widevine System ID extension in the intermediate cert
const int extension_count = X509_get_ext_count(intermediate_cert);
for (int i = 0; i < extension_count; ++i) {
X509_EXTENSION* const extension = X509_get_ext(intermediate_cert, i);
if (!extension) {
LOGE("CryptoSession::GetSystemId: Unable to get cert extension %d", i);
continue;
}
ASN1_OBJECT* const extension_object = X509_EXTENSION_get_object(extension);
if (!extension_object) {
LOGE("CryptoSession::GetSystemId: Unable to get object of cert "
"extension %d", i);
continue;
}
char extension_name[kExtensionOidSize + 1];
OBJ_obj2txt(extension_name, kExtensionOidSize, extension_object, 1);
if (strcmp(extension_name, kWidevineSystemIdExtensionOid) != 0) {
// This extension is not the Widevine System ID, so we should move on to
// the next one.
continue;
}
ASN1_OCTET_STRING* const octet_str = X509_EXTENSION_get_data(extension);
if (!octet_str) {
LOGE("CryptoSession::GetSystemId: Unable to get data of Widevine System "
"ID extension.");
return false;
}
const unsigned char* data = octet_str->data;
if (!data) {
LOGE("CryptoSession::GetSystemId: Null data in Widevine System ID "
"extension.");
return false;
}
ASN1_INTEGER* const asn1_integer =
d2i_ASN1_INTEGER(NULL, &data, octet_str->length);
if (!asn1_integer) {
LOGE("CryptoSession::GetSystemId: Unable to decode data in Widevine "
"System ID extension.");
return false;
}
const long system_id_long = ASN1_INTEGER_get(asn1_integer);
ASN1_INTEGER_free(asn1_integer);
if (system_id_long == -1) {
LOGE("CryptoSession::GetSystemId: Unable to decode ASN integer in "
"Widevine System ID extension.");
return false;
}
*system_id = static_cast<uint32_t>(system_id_long);
return true;
}
LOGE("CryptoSession::GetSystemId: Widevine System ID extension not found.");
return false;
}
bool CryptoSession::GetProvisioningId(std::string* provisioning_id) { bool CryptoSession::GetProvisioningId(std::string* provisioning_id) {
if (!provisioning_id) { if (!provisioning_id) {

248
libwvdrmengine/cdm/core/test/crypto_session_unittest.cpp Normal file
View File

@@ -0,0 +1,248 @@
// Copyright 2017 Google Inc. All Rights Reserved.
#include <string>
#include <gtest/gtest.h>
#include "crypto_session.h"
#include "scoped_ptr.h"
namespace {
const uint8_t kOemCert[] = {
0x30, 0x82, 0x09, 0xf7, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d,
0x01, 0x07, 0x02, 0xa0, 0x82, 0x09, 0xe8, 0x30, 0x82, 0x09, 0xe4, 0x02,
0x01, 0x01, 0x31, 0x00, 0x30, 0x0f, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86,
0xf7, 0x0d, 0x01, 0x07, 0x01, 0xa0, 0x02, 0x04, 0x00, 0xa0, 0x82, 0x09,
0xc8, 0x30, 0x82, 0x04, 0x1a, 0x30, 0x82, 0x03, 0x02, 0xa0, 0x03, 0x02,
0x01, 0x02, 0x02, 0x11, 0x00, 0xf2, 0xa1, 0x08, 0xdf, 0x12, 0x84, 0xb9,
0x73, 0x6c, 0x23, 0x73, 0xe1, 0x1f, 0xf3, 0xac, 0x7a, 0x30, 0x0d, 0x06,
0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x0b, 0x05, 0x00,
0x30, 0x81, 0x8b, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06,
0x13, 0x02, 0x55, 0x53, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04,
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0x28, 0x03, 0x72, 0x57, 0xbf, 0x47, 0x29, 0x99, 0x8f, 0x74, 0x1d, 0x01,
0x16, 0xad, 0xb2, 0xdf, 0x80, 0xa4, 0xd3, 0x8b, 0xeb, 0x61, 0xd1, 0x40,
0x68, 0xb9, 0xa2, 0xa5, 0xef, 0x2b, 0xe5, 0x78, 0xe8, 0x28, 0x88, 0x87,
0xb7, 0x53, 0x49, 0xbb, 0xe4, 0xea, 0x0d, 0x5e, 0x96, 0xa5, 0xdd, 0x1f,
0x0b, 0x25, 0x8b, 0xb5, 0x95, 0x46, 0xe7, 0xba, 0xb8, 0xc4, 0x0a, 0x36,
0xb1, 0x89, 0xeb, 0x27, 0x5d, 0xd9, 0x97, 0x24, 0x59, 0xa3, 0x9b, 0xb0,
0x23, 0x0b, 0xd2, 0xec, 0x65, 0x91, 0xf9, 0xf0, 0xa0, 0x74, 0x5f, 0xb4,
0xce, 0x22, 0x27, 0x18, 0x37, 0xe2, 0x4b, 0xfc, 0x91, 0xf9, 0x09, 0x15,
0xe6, 0xdb, 0x06, 0x9b, 0x4d, 0x82, 0xdc, 0x36, 0x14, 0x48, 0xc6, 0xd5,
0x87, 0xca, 0xec, 0x5a, 0xa2, 0x29, 0x33, 0xef, 0x22, 0x0c, 0x4b, 0xbf,
0xe7, 0x2f, 0x95, 0xe1, 0xd3, 0xa5, 0xd8, 0xaa, 0x44, 0x77, 0x29, 0xa3,
0x20, 0x33, 0xd2, 0x51, 0xa2, 0xf9, 0x4a, 0x6f, 0xf7, 0x3e, 0xf7, 0x0b,
0x8a, 0xec, 0xc1, 0x99, 0x1d, 0x47, 0xf3, 0x74, 0x02, 0x04, 0xab, 0x8e,
0x62, 0x4c, 0x9e, 0x00, 0xc2, 0x84, 0xd7, 0xd0, 0xf8, 0xe4, 0x1c, 0x9d,
0x98, 0x15, 0xa8, 0x8f, 0x08, 0x98, 0x4e, 0x5a, 0xfa, 0xd6, 0x60, 0x87,
0x12, 0xdc, 0x8e, 0xfd, 0xcb, 0xb3, 0x13, 0x97, 0x7a, 0xa8, 0x8c, 0x56,
0x2e, 0x49, 0x26, 0x60, 0xe9, 0x4a, 0xdc, 0xec, 0x3f, 0xf0, 0x94, 0xcd,
0x90, 0x8e, 0x7c, 0x21, 0x3f, 0x80, 0x14, 0x33, 0xdd, 0xb0, 0x00, 0xe2,
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0x16, 0x30, 0x14, 0x30, 0x12, 0x06, 0x0a, 0x2b, 0x06, 0x01, 0x04, 0x01,
0xd6, 0x79, 0x04, 0x01, 0x01, 0x04, 0x04, 0x02, 0x02, 0x1c, 0xb2, 0x30,
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0x05, 0x00, 0x03, 0x82, 0x01, 0x01, 0x00, 0x8e, 0x2d, 0x13, 0x1e, 0x60,
0xaa, 0xda, 0x52, 0x53, 0x55, 0x64, 0x3a, 0xdc, 0xb6, 0x7a, 0xc0, 0xba,
0xfa, 0xeb, 0x20, 0xab, 0xb6, 0x63, 0xcf, 0xcd, 0x9b, 0xdb, 0x71, 0xf3,
0xa0, 0xd6, 0x91, 0xbf, 0x0c, 0xc1, 0xae, 0x8f, 0x02, 0x18, 0x00, 0x54,
0xfb, 0x49, 0x03, 0x34, 0x8d, 0x92, 0x9d, 0x5d, 0x8d, 0xa8, 0x1c, 0x20,
0x0f, 0x85, 0x60, 0xf9, 0xf6, 0x8b, 0xbb, 0x2b, 0x82, 0xce, 0xb3, 0xe2,
0x91, 0xe7, 0xbd, 0x91, 0x61, 0x52, 0x36, 0x40, 0x9f, 0x2f, 0x5e, 0xa6,
0x5d, 0x2f, 0xb3, 0x81, 0xe7, 0xf1, 0x87, 0xbe, 0xc5, 0x9d, 0x67, 0x5a,
0xf7, 0x41, 0x1e, 0x73, 0xb0, 0x1e, 0xdc, 0x4f, 0x8d, 0x53, 0x21, 0x38,
0x1b, 0xfd, 0x92, 0x43, 0x68, 0x83, 0x03, 0xd0, 0x9a, 0xca, 0x92, 0x14,
0x73, 0x04, 0x94, 0x2a, 0x93, 0x22, 0x60, 0x5e, 0xee, 0xb6, 0xec, 0x0f,
0xb0, 0xc8, 0x92, 0x97, 0xfb, 0x5d, 0xed, 0x1f, 0xa0, 0x5f, 0xe4, 0x98,
0x2f, 0xf6, 0x13, 0x78, 0x99, 0xec, 0xb3, 0xf1, 0x0d, 0x27, 0xaa, 0x19,
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0xde, 0xa1, 0x44, 0x32, 0x52, 0x49, 0x47, 0xff, 0x65, 0x79, 0x1e, 0xc5,
0x73, 0x17, 0xb3, 0x36, 0xfc, 0x45, 0xca, 0x90, 0x37, 0x59, 0x1e, 0x16,
0xab, 0x09, 0x69, 0xcf, 0xda, 0x56, 0x51, 0xfd, 0xeb, 0xcf, 0xcb, 0x8f,
0xb1, 0xc3, 0x45, 0x2b, 0x7c, 0x0a, 0xa5, 0x9c, 0x0d, 0x2c, 0xad, 0x1c,
0xd3, 0x33, 0xdd, 0xfe, 0x93, 0x69, 0xa2, 0x4b, 0x4b, 0xcf, 0x1d, 0x20,
0x98, 0x4a, 0x4f, 0x5b, 0xe9, 0x24, 0xca, 0xfa, 0x18, 0x11, 0x81, 0x8b,
0x7a, 0xb4, 0x5a, 0xc8, 0xdf, 0x6f, 0x5f, 0x21, 0x07, 0x31, 0x00
};
const uint32_t kOemCertSystemId = 7346;
} // namespace
namespace wvcdm {
class CryptoSessionForTest: public CryptoSession {
public:
using CryptoSession::ExtractSystemIdFromOemCert;
};
TEST(CryptoSessionTest, CanExtractSystemIdFromOemCertificate) {
std::string oem_cert(reinterpret_cast<const char*>(kOemCert),
sizeof(kOemCert));
uint32_t system_id;
ASSERT_TRUE(CryptoSessionForTest::ExtractSystemIdFromOemCert(oem_cert,
&system_id));
ASSERT_EQ(kOemCertSystemId, system_id);
}
} // namespace wvcdm

4
libwvdrmengine/cdm/test/Android.mk
View File

@@ -27,6 +27,10 @@ test_name := cdm_session_unittest
test_src_dir := ../core/test test_src_dir := ../core/test
include $(LOCAL_PATH)/unit-test.mk include $(LOCAL_PATH)/unit-test.mk
test_name := crypto_session_unittest
test_src_dir := ../core/test
include $(LOCAL_PATH)/unit-test.mk
test_name := device_files_unittest test_name := device_files_unittest
test_src_dir := ../core/test test_src_dir := ../core/test
include $(LOCAL_PATH)/unit-test.mk include $(LOCAL_PATH)/unit-test.mk

1
libwvdrmengine/run_all_unit_tests.sh
View File

@@ -83,6 +83,7 @@ adb_shell_run base64_test
adb_shell_run buffer_reader_test adb_shell_run buffer_reader_test
adb_shell_run cdm_engine_test adb_shell_run cdm_engine_test
adb_shell_run cdm_session_unittest adb_shell_run cdm_session_unittest
adb_shell_run crypto_session_unittest
adb_shell_run device_files_unittest adb_shell_run device_files_unittest
adb_shell_run distribution_test adb_shell_run distribution_test
adb_shell_run event_metric_test adb_shell_run event_metric_test

1
tests/Android.mk
View File

@@ -12,6 +12,7 @@ WIDEVINE_TEST_MAKE_TARGETS := \
cdm_engine_test \ cdm_engine_test \
cdm_extended_duration_test \ cdm_extended_duration_test \
cdm_session_unittest \ cdm_session_unittest \
crypto_session_unittest \
device_files_unittest \ device_files_unittest \
distribution_test \ distribution_test \
event_metric_test \ event_metric_test \