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Side by Side Diff: media/cast/common/transport_encryption_handler.cc

Issue 1534273002: Switch to standard integer types in media/. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: more Created 5 years ago
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1 // Copyright 2014 The Chromium Authors. All rights reserved. 1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "media/cast/common/transport_encryption_handler.h" 5 #include "media/cast/common/transport_encryption_handler.h"
6 6
7 #include "base/logging.h" 7 #include "base/logging.h"
8 #include "crypto/encryptor.h" 8 #include "crypto/encryptor.h"
9 #include "crypto/symmetric_key.h" 9 #include "crypto/symmetric_key.h"
10 #include "media/cast/net/cast_transport_defines.h" 10 #include "media/cast/net/cast_transport_defines.h"
11 11
12 namespace { 12 namespace {
13 13
14 // Crypto. 14 // Crypto.
15 const size_t kAesBlockSize = 16; 15 const size_t kAesBlockSize = 16;
16 const size_t kAesKeySize = 16; 16 const size_t kAesKeySize = 16;
17 17
18 std::string GetAesNonce(uint32 frame_id, const std::string& iv_mask) { 18 std::string GetAesNonce(uint32_t frame_id, const std::string& iv_mask) {
19 std::string aes_nonce(kAesBlockSize, 0); 19 std::string aes_nonce(kAesBlockSize, 0);
20 20
21 // Serializing frame_id in big-endian order (aes_nonce[8] is the most 21 // Serializing frame_id in big-endian order (aes_nonce[8] is the most
22 // significant byte of frame_id). 22 // significant byte of frame_id).
23 aes_nonce[11] = frame_id & 0xff; 23 aes_nonce[11] = frame_id & 0xff;
24 aes_nonce[10] = (frame_id >> 8) & 0xff; 24 aes_nonce[10] = (frame_id >> 8) & 0xff;
25 aes_nonce[9] = (frame_id >> 16) & 0xff; 25 aes_nonce[9] = (frame_id >> 16) & 0xff;
26 aes_nonce[8] = (frame_id >> 24) & 0xff; 26 aes_nonce[8] = (frame_id >> 24) & 0xff;
27 27
28 for (size_t i = 0; i < kAesBlockSize; ++i) { 28 for (size_t i = 0; i < kAesBlockSize; ++i) {
(...skipping 25 matching lines...) Expand all
54 } else if (aes_iv_mask.size() != 0 || aes_key.size() != 0) { 54 } else if (aes_iv_mask.size() != 0 || aes_key.size() != 0) {
55 DCHECK_EQ(aes_iv_mask.size(), 0u) 55 DCHECK_EQ(aes_iv_mask.size(), 0u)
56 << "Invalid Crypto configuration: aes_iv_mask.size"; 56 << "Invalid Crypto configuration: aes_iv_mask.size";
57 DCHECK_EQ(aes_key.size(), 0u) 57 DCHECK_EQ(aes_key.size(), 0u)
58 << "Invalid Crypto configuration: aes_key.size"; 58 << "Invalid Crypto configuration: aes_key.size";
59 return false; 59 return false;
60 } 60 }
61 return true; 61 return true;
62 } 62 }
63 63
64 bool TransportEncryptionHandler::Encrypt(uint32 frame_id, 64 bool TransportEncryptionHandler::Encrypt(uint32_t frame_id,
65 const base::StringPiece& data, 65 const base::StringPiece& data,
66 std::string* encrypted_data) { 66 std::string* encrypted_data) {
67 if (!is_activated_) 67 if (!is_activated_)
68 return false; 68 return false;
69 if (!encryptor_->SetCounter(GetAesNonce(frame_id, iv_mask_))) { 69 if (!encryptor_->SetCounter(GetAesNonce(frame_id, iv_mask_))) {
70 NOTREACHED() << "Failed to set counter"; 70 NOTREACHED() << "Failed to set counter";
71 return false; 71 return false;
72 } 72 }
73 if (!encryptor_->Encrypt(data, encrypted_data)) { 73 if (!encryptor_->Encrypt(data, encrypted_data)) {
74 NOTREACHED() << "Encrypt error"; 74 NOTREACHED() << "Encrypt error";
75 return false; 75 return false;
76 } 76 }
77 return true; 77 return true;
78 } 78 }
79 79
80 bool TransportEncryptionHandler::Decrypt(uint32 frame_id, 80 bool TransportEncryptionHandler::Decrypt(uint32_t frame_id,
81 const base::StringPiece& ciphertext, 81 const base::StringPiece& ciphertext,
82 std::string* plaintext) { 82 std::string* plaintext) {
83 if (!is_activated_) { 83 if (!is_activated_) {
84 return false; 84 return false;
85 } 85 }
86 if (!encryptor_->SetCounter(GetAesNonce(frame_id, iv_mask_))) { 86 if (!encryptor_->SetCounter(GetAesNonce(frame_id, iv_mask_))) {
87 NOTREACHED() << "Failed to set counter"; 87 NOTREACHED() << "Failed to set counter";
88 return false; 88 return false;
89 } 89 }
90 if (!encryptor_->Decrypt(ciphertext, plaintext)) { 90 if (!encryptor_->Decrypt(ciphertext, plaintext)) {
91 VLOG(1) << "Decryption error"; 91 VLOG(1) << "Decryption error";
92 return false; 92 return false;
93 } 93 }
94 return true; 94 return true;
95 } 95 }
96 96
97 } // namespace cast 97 } // namespace cast
98 } // namespace media 98 } // namespace media
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