adf03c92f4
[ Merge of http://go/wvgerrit/169230 ] Bug: 275675184 Test: Compile and GtsMediaTestCases Change-Id: I3dc01f383a1fae07c126782e8d3561ab724316a8
317 lines
12 KiB
C++
317 lines
12 KiB
C++
// Copyright 2018 Google LLC. All Rights Reserved. This file and proprietary
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// source code may only be used and distributed under the Widevine License
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// Agreement.
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#include "service_certificate.h"
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#include "cdm_random.h"
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#include "crypto_key.h"
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#include "crypto_session.h"
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#include "license_protocol.pb.h"
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#include "log.h"
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#include "privacy_crypto.h"
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#include "properties.h"
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#include "wv_cdm_constants.h"
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namespace {
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// Root certificate for all Google/Widevine certificates. I.e. all service
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// certificates and DRM certificates are signed by this cert, or have this cert
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// as the root of a signing chain.
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// clang-format off
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static const unsigned char kRootCertForProd[] = {
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0x0a, 0x9c, 0x03, 0x08, 0x00, 0x12, 0x01, 0x00,
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0x18, 0xdd, 0x94, 0x88, 0x8b, 0x05, 0x22, 0x8e,
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0x03, 0x30, 0x82, 0x01, 0x8a, 0x02, 0x82, 0x01,
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0x81, 0x00, 0xb4, 0xfe, 0x39, 0xc3, 0x65, 0x90,
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0x03, 0xdb, 0x3c, 0x11, 0x97, 0x09, 0xe8, 0x68,
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0xcd, 0xf2, 0xc3, 0x5e, 0x9b, 0xf2, 0xe7, 0x4d,
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0x23, 0xb1, 0x10, 0xdb, 0x87, 0x65, 0xdf, 0xdc,
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0xfb, 0x9f, 0x35, 0xa0, 0x57, 0x03, 0x53, 0x4c,
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0xf6, 0x6d, 0x35, 0x7d, 0xa6, 0x78, 0xdb, 0xb3,
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0x36, 0xd2, 0x3f, 0x9c, 0x40, 0xa9, 0x95, 0x26,
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0x72, 0x7f, 0xb8, 0xbe, 0x66, 0xdf, 0xc5, 0x21,
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0x98, 0x78, 0x15, 0x16, 0x68, 0x5d, 0x2f, 0x46,
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0x0e, 0x43, 0xcb, 0x8a, 0x84, 0x39, 0xab, 0xfb,
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0xb0, 0x35, 0x80, 0x22, 0xbe, 0x34, 0x23, 0x8b,
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0xab, 0x53, 0x5b, 0x72, 0xec, 0x4b, 0xb5, 0x48,
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0x69, 0x53, 0x3e, 0x47, 0x5f, 0xfd, 0x09, 0xfd,
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0xa7, 0x76, 0x13, 0x8f, 0x0f, 0x92, 0xd6, 0x4c,
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0xdf, 0xae, 0x76, 0xa9, 0xba, 0xd9, 0x22, 0x10,
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0xa9, 0x9d, 0x71, 0x45, 0xd6, 0xd7, 0xe1, 0x19,
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0x25, 0x85, 0x9c, 0x53, 0x9a, 0x97, 0xeb, 0x84,
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0xd7, 0xcc, 0xa8, 0x88, 0x82, 0x20, 0x70, 0x26,
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0x20, 0xfd, 0x7e, 0x40, 0x50, 0x27, 0xe2, 0x25,
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0x93, 0x6f, 0xbc, 0x3e, 0x72, 0xa0, 0xfa, 0xc1,
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0xbd, 0x29, 0xb4, 0x4d, 0x82, 0x5c, 0xc1, 0xb4,
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0xcb, 0x9c, 0x72, 0x7e, 0xb0, 0xe9, 0x8a, 0x17,
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0x3e, 0x19, 0x63, 0xfc, 0xfd, 0x82, 0x48, 0x2b,
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0xb7, 0xb2, 0x33, 0xb9, 0x7d, 0xec, 0x4b, 0xba,
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0x89, 0x1f, 0x27, 0xb8, 0x9b, 0x88, 0x48, 0x84,
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0xaa, 0x18, 0x92, 0x0e, 0x65, 0xf5, 0xc8, 0x6c,
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0x11, 0xff, 0x6b, 0x36, 0xe4, 0x74, 0x34, 0xca,
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0x8c, 0x33, 0xb1, 0xf9, 0xb8, 0x8e, 0xb4, 0xe6,
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0x12, 0xe0, 0x02, 0x98, 0x79, 0x52, 0x5e, 0x45,
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0x33, 0xff, 0x11, 0xdc, 0xeb, 0xc3, 0x53, 0xba,
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0x7c, 0x60, 0x1a, 0x11, 0x3d, 0x00, 0xfb, 0xd2,
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0xb7, 0xaa, 0x30, 0xfa, 0x4f, 0x5e, 0x48, 0x77,
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0x5b, 0x17, 0xdc, 0x75, 0xef, 0x6f, 0xd2, 0x19,
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0x6d, 0xdc, 0xbe, 0x7f, 0xb0, 0x78, 0x8f, 0xdc,
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0x82, 0x60, 0x4c, 0xbf, 0xe4, 0x29, 0x06, 0x5e,
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0x69, 0x8c, 0x39, 0x13, 0xad, 0x14, 0x25, 0xed,
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0x19, 0xb2, 0xf2, 0x9f, 0x01, 0x82, 0x0d, 0x56,
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0x44, 0x88, 0xc8, 0x35, 0xec, 0x1f, 0x11, 0xb3,
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0x24, 0xe0, 0x59, 0x0d, 0x37, 0xe4, 0x47, 0x3c,
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0xea, 0x4b, 0x7f, 0x97, 0x31, 0x1c, 0x81, 0x7c,
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0x94, 0x8a, 0x4c, 0x7d, 0x68, 0x15, 0x84, 0xff,
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0xa5, 0x08, 0xfd, 0x18, 0xe7, 0xe7, 0x2b, 0xe4,
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0x47, 0x27, 0x12, 0x11, 0xb8, 0x23, 0xec, 0x58,
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0x93, 0x3c, 0xac, 0x12, 0xd2, 0x88, 0x6d, 0x41,
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0x3d, 0xc5, 0xfe, 0x1c, 0xdc, 0xb9, 0xf8, 0xd4,
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0x51, 0x3e, 0x07, 0xe5, 0x03, 0x6f, 0xa7, 0x12,
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0xe8, 0x12, 0xf7, 0xb5, 0xce, 0xa6, 0x96, 0x55,
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0x3f, 0x78, 0xb4, 0x64, 0x82, 0x50, 0xd2, 0x33,
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0x5f, 0x91, 0x02, 0x03, 0x01, 0x00, 0x01, 0x12,
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0x80, 0x03, 0x58, 0xf1, 0xd6, 0x4d, 0x04, 0x09,
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0x7b, 0xdf, 0xd7, 0xef, 0x5d, 0x3b, 0x02, 0x39,
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0x17, 0xfa, 0x14, 0x36, 0x75, 0x4a, 0x38, 0x67,
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0x85, 0x57, 0x12, 0xa7, 0x14, 0xee, 0x35, 0x16,
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0xd5, 0x3d, 0xbf, 0x42, 0x86, 0xf6, 0x69, 0x00,
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0x76, 0xcd, 0x93, 0xf4, 0x7c, 0xb2, 0xdf, 0x9e,
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0x44, 0xcd, 0x4c, 0xd4, 0xae, 0x09, 0x18, 0x53,
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0x44, 0x32, 0xec, 0xe0, 0x61, 0x1b, 0xe5, 0xda,
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0x13, 0xd3, 0x55, 0xc5, 0xdd, 0x1a, 0xcb, 0x90,
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0x1e, 0x7e, 0x5b, 0xc6, 0xe9, 0x0f, 0x22, 0x9f,
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0xbe, 0x85, 0x02, 0xfe, 0x90, 0x31, 0xcc, 0x6b,
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0x03, 0x84, 0xbd, 0x22, 0xc4, 0x55, 0xfa, 0xf5,
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0xf2, 0x08, 0xcd, 0x65, 0x41, 0x58, 0xe8, 0x7d,
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0x29, 0xda, 0x04, 0x58, 0x82, 0xf5, 0x37, 0x69,
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0xbc, 0xf3, 0x5a, 0x57, 0x84, 0x17, 0x7b, 0x32,
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0x87, 0x70, 0xb2, 0xb0, 0x76, 0x9c, 0xb2, 0xc3,
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0x15, 0xd1, 0x11, 0x26, 0x2a, 0x23, 0x75, 0x99,
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0x3e, 0xb9, 0x77, 0x22, 0x32, 0x0d, 0xbc, 0x1a,
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0x19, 0xc1, 0xd5, 0x65, 0x90, 0x76, 0x55, 0x74,
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0x0f, 0x0e, 0x69, 0x4d, 0x5f, 0x4d, 0x8f, 0x19,
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0xaf, 0xdf, 0xd6, 0x16, 0x31, 0x94, 0xa8, 0x92,
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0x5f, 0x4f, 0xbc, 0x7a, 0x31, 0xf8, 0xae, 0x8e,
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0xad, 0x33, 0xb7, 0xe9, 0x30, 0xd0, 0x8c, 0x0a,
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0x8a, 0x6c, 0x83, 0x35, 0xf8, 0x8a, 0x81, 0xb2,
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0xfe, 0x1c, 0x88, 0xac, 0x2a, 0x66, 0xc5, 0xff,
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0xbd, 0xe6, 0x17, 0xd0, 0x62, 0x0b, 0xdc, 0x8a,
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0x45, 0xf7, 0xb0, 0x3e, 0x5a, 0xc8, 0x1e, 0x4a,
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0x24, 0x2f, 0x6c, 0xa5, 0xe3, 0x1c, 0x88, 0x14,
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0x83, 0xd5, 0xc5, 0xef, 0x5e, 0x9f, 0x3d, 0x85,
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0x45, 0x73, 0xe2, 0x6b, 0x50, 0x52, 0x57, 0x4c,
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0xfb, 0x92, 0x6c, 0x66, 0x75, 0x8a, 0xd6, 0x0d,
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0x1b, 0xae, 0xf3, 0xec, 0xaf, 0x51, 0x22, 0x03,
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0x5d, 0x0a, 0x2e, 0x63, 0x93, 0x9c, 0x0b, 0x01,
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0x20, 0xa8, 0xa9, 0x84, 0x2e, 0x17, 0xca, 0xae,
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0x73, 0xec, 0x22, 0x1b, 0x79, 0xae, 0xf6, 0xa0,
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0x72, 0x2c, 0xdf, 0x07, 0x47, 0xdb, 0x88, 0x86,
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0x30, 0x14, 0x78, 0x21, 0x11, 0x22, 0x88, 0xac,
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0xd7, 0x54, 0x74, 0xf9, 0xf3, 0x26, 0xc2, 0xa5,
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0x56, 0xc8, 0x56, 0x4f, 0x00, 0x29, 0x1d, 0x08,
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0x7b, 0x7a, 0xfb, 0x95, 0x89, 0xc3, 0xee, 0x98,
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0x54, 0x9e, 0x3c, 0x6b, 0x94, 0x05, 0x13, 0x12,
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0xf6, 0x71, 0xb9, 0xab, 0x13, 0xc3, 0x0c, 0x9b,
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0x46, 0x08, 0x7b, 0x3d, 0x32, 0x6a, 0x68, 0xca,
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0x1e, 0x9c, 0x90, 0x62, 0xc5, 0xed, 0x10, 0xb9,
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0x1f, 0x17, 0x25, 0xce, 0x90, 0xb9, 0x6d, 0xcd,
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0xc4, 0x46, 0xf5, 0xa3, 0x62, 0x13, 0x74, 0x02,
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0xa7, 0x62, 0xa4, 0xfa, 0x55, 0xd9, 0xde, 0xcf,
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0xa2, 0xe6, 0x80, 0x74, 0x55, 0x06, 0x49, 0xd5,
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0x02, 0x0c
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};
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// clang-format on
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} // namespace
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namespace wvcdm {
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// Protobuf generated classes.
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using video_widevine::ClientIdentification;
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using video_widevine::DrmCertificate;
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using video_widevine::EncryptedClientIdentification;
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using video_widevine::LicenseError;
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using video_widevine::SignedDrmCertificate;
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using video_widevine::SignedMessage;
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CdmResponseType ServiceCertificate::Init(const std::string& certificate) {
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std::string root_cert_str(reinterpret_cast<const char*>(&kRootCertForProd[0]),
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sizeof(kRootCertForProd));
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// Load root cert public key. Don't bother verifying it.
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SignedDrmCertificate signed_root_cert;
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if (!signed_root_cert.ParseFromString(root_cert_str)) {
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LOGE("Failed to deserialize signed root certificate");
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return CdmResponseType(DEVICE_CERTIFICATE_ERROR_1);
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}
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DrmCertificate root_cert;
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if (!root_cert.ParseFromString(signed_root_cert.drm_certificate())) {
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LOGE("Failed to deserialize root certificate");
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return CdmResponseType(DEVICE_CERTIFICATE_ERROR_1);
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}
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RsaPublicKey root_key;
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if (!root_key.Init(root_cert.public_key())) {
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LOGE("Failed to load root certificate public key");
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return CdmResponseType(DEVICE_CERTIFICATE_ERROR_1);
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}
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// Load the provided service certificate.
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// First, parse it and verify its signature.
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SignedDrmCertificate signed_service_cert;
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if (!signed_service_cert.ParseFromString(certificate)) {
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LOGE("Failed to parse signed service certificate");
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return CdmResponseType(DEVICE_CERTIFICATE_ERROR_2);
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}
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#ifdef ACCEPT_TEST_CERT
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# pragma message "(TEST ONLY): Ignoring service cert's signature."
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#else
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if (!root_key.VerifySignature(signed_service_cert.drm_certificate(),
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signed_service_cert.signature())) {
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LOGE("Failed to verify service certificate signature");
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return CdmResponseType(DEVICE_CERTIFICATE_ERROR_3);
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}
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#endif
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DrmCertificate service_cert;
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if (!service_cert.ParseFromString(signed_service_cert.drm_certificate())) {
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LOGE("Failed to parse service certificate");
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return CdmResponseType(DEVICE_CERTIFICATE_ERROR_2);
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}
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if (service_cert.type() != video_widevine::DrmCertificate_Type_SERVICE) {
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LOGE(
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"DRM device certificate type is not a service certificate: "
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"type = %d, expected_type = %d",
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static_cast<int>(service_cert.type()),
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static_cast<int>(video_widevine::DrmCertificate_Type_SERVICE));
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return CdmResponseType(DEVICE_CERTIFICATE_ERROR_3);
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}
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// Service certificate passes all checks - set up its RSA public key.
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public_key_.reset(new RsaPublicKey);
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if (!public_key_->Init(service_cert.public_key())) {
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public_key_.reset();
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LOGE("Failed to load service certificate public key");
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return CdmResponseType(DEVICE_CERTIFICATE_ERROR_2);
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}
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// Have service certificate and its public key - keep relevant fields.
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certificate_ = certificate;
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serial_number_ = service_cert.serial_number();
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provider_id_ = service_cert.provider_id();
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has_certificate_ = true;
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return CdmResponseType(NO_ERROR);
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}
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CdmResponseType ServiceCertificate::VerifySignedMessage(
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const std::string& message, const std::string& signature) const {
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if (!public_key_) {
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LOGE("Service certificate not set");
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return CdmResponseType(DEVICE_CERTIFICATE_ERROR_4);
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}
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if (!public_key_->VerifySignature(message, signature))
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return CdmResponseType(
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CLIENT_ID_RSA_ENCRYPT_ERROR); // TODO(rfrias): Need new error code.
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return CdmResponseType(NO_ERROR);
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}
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CdmResponseType ServiceCertificate::EncryptRsaOaep(
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const std::string& plaintext, std::string* ciphertext) const {
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if (!public_key_) {
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LOGE("Service certificate not set");
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return CdmResponseType(DEVICE_CERTIFICATE_ERROR_4);
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}
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if (!public_key_->Encrypt(plaintext, ciphertext))
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return CdmResponseType(CLIENT_ID_RSA_ENCRYPT_ERROR);
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return CdmResponseType(NO_ERROR);
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}
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CdmResponseType ServiceCertificate::EncryptClientId(
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CryptoSession* /* crypto_session */,
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const ClientIdentification* clear_client_id,
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EncryptedClientIdentification* encrypted_client_id) const {
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encrypted_client_id->set_provider_id(provider_id_);
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encrypted_client_id->set_service_certificate_serial_number(serial_number_);
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std::string iv = wvutil::CdmRandom::RandomData(KEY_IV_SIZE);
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std::string key = wvutil::CdmRandom::RandomData(SERVICE_KEY_SIZE);
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if (key.length() != SERVICE_KEY_SIZE || iv.length() != KEY_IV_SIZE) {
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LOGE("RandomData failed for key or iv.");
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return CdmResponseType(CLIENT_ID_GENERATE_RANDOM_ERROR);
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}
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std::string id, enc_id, enc_key;
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clear_client_id->SerializeToString(&id);
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AesCbcKey aes;
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if (!aes.Init(key)) return CdmResponseType(CLIENT_ID_AES_INIT_ERROR);
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if (!aes.Encrypt(id, &enc_id, &iv))
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return CdmResponseType(CLIENT_ID_AES_ENCRYPT_ERROR);
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CdmResponseType encrypt_result = EncryptRsaOaep(key, &enc_key);
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if (encrypt_result != NO_ERROR) return encrypt_result;
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encrypted_client_id->set_encrypted_client_id_iv(iv);
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encrypted_client_id->set_encrypted_privacy_key(enc_key);
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encrypted_client_id->set_encrypted_client_id(enc_id);
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return CdmResponseType(NO_ERROR);
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}
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bool ServiceCertificate::GetRequest(CdmKeyMessage* request) {
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if (request == nullptr) {
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LOGE("Output parameter |request| not provided");
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return false;
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}
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SignedMessage message;
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message.set_type(SignedMessage::SERVICE_CERTIFICATE_REQUEST);
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message.SerializeToString(request);
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return true;
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}
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CdmResponseType ServiceCertificate::ParseResponse(const std::string& response,
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std::string* certificate) {
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if (response.empty()) {
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LOGE("Response is empty");
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return CdmResponseType(EMPTY_RESPONSE_ERROR_1);
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}
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if (certificate == nullptr) {
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LOGE("Output parameter |certificate| not provided");
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return CdmResponseType(INVALID_PARAMETERS_ENG_24);
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}
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SignedMessage signed_response;
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if (!signed_response.ParseFromString(response)) {
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LOGE("Failed to parse signed response");
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return CdmResponseType(PARSE_RESPONSE_ERROR_1);
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}
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if (signed_response.type() == SignedMessage::ERROR_RESPONSE) {
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LicenseError license_error;
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if (!license_error.ParseFromString(signed_response.msg())) {
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LOGE("Failed to parse license error");
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return CdmResponseType(PARSE_RESPONSE_ERROR_2);
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}
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LOGE("Server response contains error: error_code = %d",
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static_cast<int>(license_error.error_code()));
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return CdmResponseType(PARSE_RESPONSE_ERROR_3);
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}
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if (signed_response.type() != SignedMessage::SERVICE_CERTIFICATE) {
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LOGE("Unexpected response type: type = %d, expected_type = %d",
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static_cast<int>(signed_response.type()),
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static_cast<int>(SignedMessage::SERVICE_CERTIFICATE));
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return CdmResponseType(PARSE_RESPONSE_ERROR_4);
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}
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certificate->assign(signed_response.msg());
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return CdmResponseType(NO_ERROR);
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}
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} // namespace wvcdm
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