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<li class="navelem"><a class="el" href="../../dir_3f8eec2fc361645de4b1ec14c19fffc7.html">packager</a></li><li class="navelem"><a class="el" href="../../dir_f99dae54fe7170f791f339b952d5067a.html">media</a></li><li class="navelem"><a class="el" href="../../dir_aa847bee70cdde822696c7e33a504139.html">crypto</a></li> </ul>
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<div class="title">encryption_handler.cc</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2017 Google Inc. All rights reserved.</span></div>
|
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Use of this source code is governed by a BSD-style</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// license that can be found in the LICENSE file or at</span></div>
|
||
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// https://developers.google.com/open-source/licenses/bsd</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>  </div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include "packager/media/crypto/encryption_handler.h"</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  </div>
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||
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include <stddef.h></span></div>
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||
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include <stdint.h></span></div>
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||
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>  </div>
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||
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include <algorithm></span></div>
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||
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  </div>
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||
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "packager/media/base/aes_encryptor.h"</span></div>
|
||
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "packager/media/base/audio_stream_info.h"</span></div>
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||
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include "packager/media/base/common_pssh_generator.h"</span></div>
|
||
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include "packager/media/base/key_source.h"</span></div>
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||
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include "packager/media/base/macros.h"</span></div>
|
||
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include "packager/media/base/media_sample.h"</span></div>
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||
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include "packager/media/base/playready_pssh_generator.h"</span></div>
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||
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include "packager/media/base/protection_system_ids.h"</span></div>
|
||
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include "packager/media/base/video_stream_info.h"</span></div>
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||
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include "packager/media/base/widevine_pssh_generator.h"</span></div>
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||
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include "packager/media/crypto/aes_encryptor_factory.h"</span></div>
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||
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include "packager/media/crypto/subsample_generator.h"</span></div>
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||
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include "packager/status_macros.h"</span></div>
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||
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  </div>
|
||
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">namespace </span><a class="code" href="../../d8/daf/namespaceshaka.html">shaka</a> {</div>
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||
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">namespace </span>media {</div>
|
||
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  </div>
|
||
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">namespace </span>{</div>
|
||
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">// The encryption handler only supports a single output.</span></div>
|
||
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="keyword">const</span> <span class="keywordtype">size_t</span> kStreamIndex = 0;</div>
|
||
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  </div>
|
||
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">// The default KID, KEY and IV for key rotation are all 0s.</span></div>
|
||
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">// They are placeholders and are not really being used to encrypt data.</span></div>
|
||
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">const</span> uint8_t kKeyRotationDefaultKeyId[] = {</div>
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||
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,</div>
|
||
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> };</div>
|
||
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="keyword">const</span> uint8_t kKeyRotationDefaultKey[] = {</div>
|
||
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,</div>
|
||
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> };</div>
|
||
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">const</span> uint8_t kKeyRotationDefaultIv[] = {</div>
|
||
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  0, 0, 0, 0, 0, 0, 0, 0,</div>
|
||
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> };</div>
|
||
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  </div>
|
||
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> std::string GetStreamLabelForEncryption(</div>
|
||
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keyword">const</span> StreamInfo& stream_info,</div>
|
||
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">const</span> std::function<std::string(</div>
|
||
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keyword">const</span> EncryptionParams::EncryptedStreamAttributes& stream_attributes)>&</div>
|
||
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  stream_label_func) {</div>
|
||
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  EncryptionParams::EncryptedStreamAttributes stream_attributes;</div>
|
||
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">if</span> (stream_info.stream_type() == kStreamAudio) {</div>
|
||
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  stream_attributes.stream_type =</div>
|
||
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  EncryptionParams::EncryptedStreamAttributes::kAudio;</div>
|
||
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (stream_info.stream_type() == kStreamVideo) {</div>
|
||
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keyword">const</span> VideoStreamInfo& video_stream_info =</div>
|
||
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keyword">static_cast<</span><span class="keyword">const </span>VideoStreamInfo&<span class="keyword">></span>(stream_info);</div>
|
||
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  stream_attributes.stream_type =</div>
|
||
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  EncryptionParams::EncryptedStreamAttributes::kVideo;</div>
|
||
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  stream_attributes.oneof.video.width = video_stream_info.width();</div>
|
||
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  stream_attributes.oneof.video.height = video_stream_info.height();</div>
|
||
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  }</div>
|
||
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">return</span> stream_label_func(stream_attributes);</div>
|
||
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> }</div>
|
||
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  </div>
|
||
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="keywordtype">bool</span> IsPatternEncryptionScheme(FourCC protection_scheme) {</div>
|
||
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">return</span> protection_scheme == kAppleSampleAesProtectionScheme ||</div>
|
||
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  protection_scheme == FOURCC_cbcs || protection_scheme == FOURCC_cens;</div>
|
||
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> }</div>
|
||
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  </div>
|
||
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="keywordtype">void</span> FillPsshGenerators(</div>
|
||
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keyword">const</span> EncryptionParams& encryption_params,</div>
|
||
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  std::vector<std::unique_ptr<PsshGenerator>>* pssh_generators,</div>
|
||
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  std::vector<std::vector<uint8_t>>* no_pssh_systems) {</div>
|
||
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">if</span> (has_flag(encryption_params.protection_systems,</div>
|
||
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <a class="code" href="../../d8/daf/namespaceshaka.html#aadc0cc211185374c4bf219da325673aca4a8a926ca6c8454f8249deec51b47e66">ProtectionSystem::kCommon</a>)) {</div>
|
||
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  pssh_generators->emplace_back(<span class="keyword">new</span> CommonPsshGenerator());</div>
|
||
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  }</div>
|
||
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  </div>
|
||
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">if</span> (has_flag(encryption_params.protection_systems,</div>
|
||
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  ProtectionSystem::kPlayReady)) {</div>
|
||
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  pssh_generators->emplace_back(<span class="keyword">new</span> PlayReadyPsshGenerator(</div>
|
||
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  encryption_params.playready_extra_header_data,</div>
|
||
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keyword">static_cast<</span>FourCC<span class="keyword">></span>(encryption_params.protection_scheme)));</div>
|
||
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  }</div>
|
||
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  </div>
|
||
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">if</span> (has_flag(encryption_params.protection_systems,</div>
|
||
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  ProtectionSystem::kWidevine)) {</div>
|
||
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  pssh_generators->emplace_back(<span class="keyword">new</span> WidevinePsshGenerator(</div>
|
||
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keyword">static_cast<</span>FourCC<span class="keyword">></span>(encryption_params.protection_scheme)));</div>
|
||
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  }</div>
|
||
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  </div>
|
||
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">if</span> (has_flag(encryption_params.protection_systems,</div>
|
||
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  ProtectionSystem::kFairPlay)) {</div>
|
||
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  no_pssh_systems->emplace_back(std::begin(kFairPlaySystemId),</div>
|
||
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  std::end(kFairPlaySystemId));</div>
|
||
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  }</div>
|
||
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="comment">// We only support Marlin Adaptive Streaming Specification – Simple Profile</span></div>
|
||
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="comment">// with Implicit Content ID Mapping, which does not need a PSSH. Marlin</span></div>
|
||
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="comment">// specific PSSH with Explicit Content ID Mapping is not generated.</span></div>
|
||
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">if</span> (has_flag(encryption_params.protection_systems,</div>
|
||
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  ProtectionSystem::kMarlin)) {</div>
|
||
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  no_pssh_systems->emplace_back(std::begin(kMarlinSystemId),</div>
|
||
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  std::end(kMarlinSystemId));</div>
|
||
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  }</div>
|
||
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  </div>
|
||
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">if</span> (pssh_generators->empty() && no_pssh_systems->empty() &&</div>
|
||
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  (encryption_params.key_provider != KeyProvider::kRawKey ||</div>
|
||
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  encryption_params.raw_key.pssh.empty())) {</div>
|
||
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  pssh_generators->emplace_back(<span class="keyword">new</span> CommonPsshGenerator());</div>
|
||
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  }</div>
|
||
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> }</div>
|
||
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  </div>
|
||
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="keywordtype">void</span> AddProtectionSystemIfNotExist(</div>
|
||
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keyword">const</span> ProtectionSystemSpecificInfo& pssh_info,</div>
|
||
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  EncryptionConfig* encryption_config) {</div>
|
||
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>& info : encryption_config->key_system_info) {</div>
|
||
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">if</span> (info.system_id == pssh_info.system_id)</div>
|
||
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">return</span>;</div>
|
||
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  }</div>
|
||
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  encryption_config->key_system_info.push_back(pssh_info);</div>
|
||
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> }</div>
|
||
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  </div>
|
||
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> Status FillProtectionSystemInfo(<span class="keyword">const</span> EncryptionParams& encryption_params,</div>
|
||
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keyword">const</span> EncryptionKey& encryption_key,</div>
|
||
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  EncryptionConfig* encryption_config) {</div>
|
||
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="comment">// If generating dummy keys for key rotation, don't generate PSSH info.</span></div>
|
||
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">if</span> (encryption_key.key_ids.empty())</div>
|
||
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordflow">return</span> Status::OK;</div>
|
||
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  </div>
|
||
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  std::vector<std::unique_ptr<PsshGenerator>> pssh_generators;</div>
|
||
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  std::vector<std::vector<uint8_t>> no_pssh_systems;</div>
|
||
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  FillPsshGenerators(encryption_params, &pssh_generators, &no_pssh_systems);</div>
|
||
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  </div>
|
||
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  encryption_config->key_system_info = encryption_key.key_system_info;</div>
|
||
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>& pssh_generator : pssh_generators) {</div>
|
||
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> support_multiple_keys = pssh_generator->SupportMultipleKeys();</div>
|
||
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">if</span> (support_multiple_keys) {</div>
|
||
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  ProtectionSystemSpecificInfo info;</div>
|
||
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  RETURN_IF_ERROR(pssh_generator->GeneratePsshFromKeyIds(</div>
|
||
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  encryption_key.key_ids, &info));</div>
|
||
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  AddProtectionSystemIfNotExist(info, encryption_config);</div>
|
||
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  } <span class="keywordflow">else</span> {</div>
|
||
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  ProtectionSystemSpecificInfo info;</div>
|
||
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  RETURN_IF_ERROR(pssh_generator->GeneratePsshFromKeyIdAndKey(</div>
|
||
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  encryption_key.key_id, encryption_key.key, &info));</div>
|
||
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  AddProtectionSystemIfNotExist(info, encryption_config);</div>
|
||
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  }</div>
|
||
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  }</div>
|
||
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  </div>
|
||
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>& no_pssh_system : no_pssh_systems) {</div>
|
||
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  ProtectionSystemSpecificInfo info;</div>
|
||
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  info.system_id = no_pssh_system;</div>
|
||
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  AddProtectionSystemIfNotExist(info, encryption_config);</div>
|
||
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  }</div>
|
||
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  </div>
|
||
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordflow">return</span> Status::OK;</div>
|
||
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> }</div>
|
||
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  </div>
|
||
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> } <span class="comment">// namespace</span></div>
|
||
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  </div>
|
||
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> EncryptionHandler::EncryptionHandler(<span class="keyword">const</span> EncryptionParams& encryption_params,</div>
|
||
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  KeySource* key_source)</div>
|
||
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  : encryption_params_(encryption_params),</div>
|
||
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  protection_scheme_(</div>
|
||
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  static_cast<FourCC>(encryption_params.protection_scheme)),</div>
|
||
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  key_source_(key_source),</div>
|
||
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  subsample_generator_(</div>
|
||
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  new SubsampleGenerator(encryption_params.vp9_subsample_encryption)),</div>
|
||
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  encryptor_factory_(new AesEncryptorFactory) {}</div>
|
||
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  </div>
|
||
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> EncryptionHandler::~EncryptionHandler() = <span class="keywordflow">default</span>;</div>
|
||
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  </div>
|
||
<div class="line"><a name="l00175"></a><span class="lineno"><a class="line" href="../../d6/d4c/classshaka_1_1media_1_1EncryptionHandler.html#a3f1808a4386081e5e1c9a798a1a69dd0"> 175</a></span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a> <a class="code" href="../../d6/d4c/classshaka_1_1media_1_1EncryptionHandler.html#a3f1808a4386081e5e1c9a798a1a69dd0">EncryptionHandler::InitializeInternal</a>() {</div>
|
||
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keywordflow">if</span> (!encryption_params_.<a class="code" href="../../dc/da0/structshaka_1_1EncryptionParams.html#a7686a6aca6a7c3d077a5d7215c39fc51">stream_label_func</a>) {</div>
|
||
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a>(error::INVALID_ARGUMENT, <span class="stringliteral">"Stream label function not set."</span>);</div>
|
||
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  }</div>
|
||
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordflow">if</span> (num_input_streams() != 1 || next_output_stream_index() != 1) {</div>
|
||
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a>(error::INVALID_ARGUMENT,</div>
|
||
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="stringliteral">"Expects exactly one input and output."</span>);</div>
|
||
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  }</div>
|
||
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keywordflow">return</span> Status::OK;</div>
|
||
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> }</div>
|
||
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  </div>
|
||
<div class="line"><a name="l00186"></a><span class="lineno"><a class="line" href="../../d6/d4c/classshaka_1_1media_1_1EncryptionHandler.html#a7887e6060eb572036674ecb9a7e045c4"> 186</a></span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a> <a class="code" href="../../d6/d4c/classshaka_1_1media_1_1EncryptionHandler.html#a7887e6060eb572036674ecb9a7e045c4">EncryptionHandler::Process</a>(std::unique_ptr<StreamData> stream_data) {</div>
|
||
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordflow">switch</span> (stream_data->stream_data_type) {</div>
|
||
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keywordflow">case</span> StreamDataType::kStreamInfo:</div>
|
||
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordflow">return</span> ProcessStreamInfo(*stream_data->stream_info);</div>
|
||
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordflow">case</span> StreamDataType::kSegmentInfo: {</div>
|
||
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  std::shared_ptr<SegmentInfo> segment_info(<span class="keyword">new</span> <a class="code" href="../../d0/dc0/structshaka_1_1media_1_1SegmentInfo.html">SegmentInfo</a>(</div>
|
||
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  *stream_data->segment_info));</div>
|
||
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  </div>
|
||
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  segment_info->is_encrypted = remaining_clear_lead_ <= 0;</div>
|
||
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  </div>
|
||
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> key_rotation_enabled = crypto_period_duration_ != 0;</div>
|
||
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordflow">if</span> (key_rotation_enabled)</div>
|
||
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  segment_info->key_rotation_encryption_config = encryption_config_;</div>
|
||
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keywordflow">if</span> (!segment_info->is_subsegment) {</div>
|
||
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordflow">if</span> (key_rotation_enabled)</div>
|
||
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  check_new_crypto_period_ = <span class="keyword">true</span>;</div>
|
||
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordflow">if</span> (remaining_clear_lead_ > 0)</div>
|
||
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  remaining_clear_lead_ -= segment_info->duration;</div>
|
||
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  }</div>
|
||
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  </div>
|
||
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="keywordflow">return</span> <a class="code" href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#a2acc1c84a61aee93229d493aa93308d5">DispatchSegmentInfo</a>(kStreamIndex, segment_info);</div>
|
||
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  }</div>
|
||
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordflow">case</span> StreamDataType::kMediaSample:</div>
|
||
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordflow">return</span> ProcessMediaSample(std::move(stream_data->media_sample));</div>
|
||
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keywordflow">default</span>:</div>
|
||
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  VLOG(3) << <span class="stringliteral">"Stream data type "</span></div>
|
||
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  << <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(stream_data->stream_data_type) << <span class="stringliteral">" ignored."</span>;</div>
|
||
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">return</span> <a class="code" href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#afe98a4fd19eabe0fc78afc91959c34a6">Dispatch</a>(std::move(stream_data));</div>
|
||
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  }</div>
|
||
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span> }</div>
|
||
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  </div>
|
||
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a> EncryptionHandler::ProcessStreamInfo(<span class="keyword">const</span> <a class="code" href="../../d5/db1/classshaka_1_1media_1_1StreamInfo.html">StreamInfo</a>& clear_info) {</div>
|
||
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordflow">if</span> (clear_info.is_encrypted()) {</div>
|
||
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordflow">return</span> <a class="code" href="../../d2/d20/classshaka_1_1Status.html">Status</a>(error::INVALID_ARGUMENT,</div>
|
||
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="stringliteral">"Input stream is already encrypted."</span>);</div>
|
||
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  }</div>
|
||
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  </div>
|
||
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  DCHECK_NE(kStreamUnknown, clear_info.stream_type());</div>
|
||
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  DCHECK_NE(kStreamText, clear_info.stream_type());</div>
|
||
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  std::shared_ptr<StreamInfo> stream_info = clear_info.<a class="code" href="../../d5/db1/classshaka_1_1media_1_1StreamInfo.html#afdd9b2df8ae1c11bb033c44eaba5e38d">Clone</a>();</div>
|
||
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  RETURN_IF_ERROR(</div>
|
||
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  subsample_generator_->Initialize(protection_scheme_, *stream_info));</div>
|
||
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  </div>
|
||
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  remaining_clear_lead_ =</div>
|
||
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  encryption_params_.<a class="code" href="../../dc/da0/structshaka_1_1EncryptionParams.html#a1ad46963dc926aa4b72813dccb3f6a45">clear_lead_in_seconds</a> * stream_info->time_scale();</div>
|
||
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  crypto_period_duration_ =</div>
|
||
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  encryption_params_.crypto_period_duration_in_seconds *</div>
|
||
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  stream_info->time_scale();</div>
|
||
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  codec_ = stream_info->codec();</div>
|
||
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  stream_label_ = GetStreamLabelForEncryption(</div>
|
||
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  *stream_info, encryption_params_.<a class="code" href="../../dc/da0/structshaka_1_1EncryptionParams.html#a7686a6aca6a7c3d077a5d7215c39fc51">stream_label_func</a>);</div>
|
||
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  </div>
|
||
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  SetupProtectionPattern(stream_info->stream_type());</div>
|
||
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  </div>
|
||
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  EncryptionKey encryption_key;</div>
|
||
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="keyword">const</span> <span class="keywordtype">bool</span> key_rotation_enabled = crypto_period_duration_ != 0;</div>
|
||
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordflow">if</span> (key_rotation_enabled) {</div>
|
||
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  check_new_crypto_period_ = <span class="keyword">true</span>;</div>
|
||
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="comment">// Setup dummy key id, key and iv to signal encryption for key rotation.</span></div>
|
||
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  encryption_key.key_id.assign(std::begin(kKeyRotationDefaultKeyId),</div>
|
||
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  std::end(kKeyRotationDefaultKeyId));</div>
|
||
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  encryption_key.key.assign(std::begin(kKeyRotationDefaultKey),</div>
|
||
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  std::end(kKeyRotationDefaultKey));</div>
|
||
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  encryption_key.iv.assign(std::begin(kKeyRotationDefaultIv),</div>
|
||
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  std::end(kKeyRotationDefaultIv));</div>
|
||
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  } <span class="keywordflow">else</span> {</div>
|
||
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  RETURN_IF_ERROR(key_source_-><a class="code" href="../../d1/d1f/classshaka_1_1media_1_1KeySource.html#af56c833453d65297c4dc96c9d2f83e1a">GetKey</a>(stream_label_, &encryption_key));</div>
|
||
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  }</div>
|
||
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="keywordflow">if</span> (!CreateEncryptor(encryption_key))</div>
|
||
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keywordflow">return</span> Status(error::ENCRYPTION_FAILURE, <span class="stringliteral">"Failed to create encryptor"</span>);</div>
|
||
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  </div>
|
||
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  stream_info->set_is_encrypted(<span class="keyword">true</span>);</div>
|
||
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  stream_info->set_has_clear_lead(encryption_params_.<a class="code" href="../../dc/da0/structshaka_1_1EncryptionParams.html#a1ad46963dc926aa4b72813dccb3f6a45">clear_lead_in_seconds</a> > 0);</div>
|
||
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  stream_info->set_encryption_config(*encryption_config_);</div>
|
||
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  </div>
|
||
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keywordflow">return</span> <a class="code" href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#ad165375cd0a2074c5a740b42f847c499">DispatchStreamInfo</a>(kStreamIndex, stream_info);</div>
|
||
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> }</div>
|
||
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  </div>
|
||
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> Status EncryptionHandler::ProcessMediaSample(</div>
|
||
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  std::shared_ptr<const MediaSample> clear_sample) {</div>
|
||
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  DCHECK(clear_sample);</div>
|
||
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  </div>
|
||
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="comment">// Process the frame even if the frame is not encrypted as the next</span></div>
|
||
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="comment">// (encrypted) frame may be dependent on this clear frame.</span></div>
|
||
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  std::vector<SubsampleEntry> subsamples;</div>
|
||
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  RETURN_IF_ERROR(subsample_generator_->GenerateSubsamples(</div>
|
||
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  clear_sample->data(), clear_sample->data_size(), &subsamples));</div>
|
||
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  </div>
|
||
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="comment">// Need to setup the encryptor for new segments even if this segment does not</span></div>
|
||
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="comment">// need to be encrypted, so we can signal encryption metadata earlier to</span></div>
|
||
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="comment">// allows clients to prefetch the keys.</span></div>
|
||
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="keywordflow">if</span> (check_new_crypto_period_) {</div>
|
||
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="comment">// |dts| can be negative, e.g. after EditList adjustments. Normalized to 0</span></div>
|
||
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="comment">// in that case.</span></div>
|
||
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keyword">const</span> int64_t dts = std::max(clear_sample->dts(), <span class="keyword">static_cast<</span>int64_t<span class="keyword">></span>(0));</div>
|
||
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keyword">const</span> int64_t current_crypto_period_index = dts / crypto_period_duration_;</div>
|
||
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keyword">const</span> uint32_t crypto_period_duration_in_seconds =</div>
|
||
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keyword">static_cast<</span>uint32_t<span class="keyword">></span>(encryption_params_.crypto_period_duration_in_seconds);</div>
|
||
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">if</span> (current_crypto_period_index != prev_crypto_period_index_) {</div>
|
||
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  EncryptionKey encryption_key;</div>
|
||
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  RETURN_IF_ERROR(key_source_-><a class="code" href="../../d1/d1f/classshaka_1_1media_1_1KeySource.html#aef67793f02b0cd34b57993fab9f789ae">GetCryptoPeriodKey</a>(</div>
|
||
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  current_crypto_period_index, crypto_period_duration_in_seconds,</div>
|
||
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  stream_label_, &encryption_key));</div>
|
||
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="keywordflow">if</span> (!CreateEncryptor(encryption_key))</div>
|
||
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keywordflow">return</span> Status(error::ENCRYPTION_FAILURE, <span class="stringliteral">"Failed to create encryptor"</span>);</div>
|
||
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  prev_crypto_period_index_ = current_crypto_period_index;</div>
|
||
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  }</div>
|
||
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  check_new_crypto_period_ = <span class="keyword">false</span>;</div>
|
||
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  }</div>
|
||
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  </div>
|
||
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="comment">// Since there is no encryption needed right now, send the clear copy</span></div>
|
||
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="comment">// downstream so we can save the costs of copying it.</span></div>
|
||
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keywordflow">if</span> (remaining_clear_lead_ > 0) {</div>
|
||
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keywordflow">return</span> <a class="code" href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#a9a74fead95bc16255e73908bbebbced9">DispatchMediaSample</a>(kStreamIndex, std::move(clear_sample));</div>
|
||
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  }</div>
|
||
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  </div>
|
||
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  std::shared_ptr<uint8_t> cipher_sample_data(</div>
|
||
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keyword">new</span> uint8_t[clear_sample->data_size()], std::default_delete<uint8_t[]>());</div>
|
||
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  </div>
|
||
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keyword">const</span> uint8_t* source = clear_sample->data();</div>
|
||
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  uint8_t* dest = cipher_sample_data.get();</div>
|
||
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keywordflow">if</span> (!subsamples.empty()) {</div>
|
||
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordtype">size_t</span> total_size = 0;</div>
|
||
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keywordflow">for</span> (<span class="keyword">const</span> SubsampleEntry& subsample : subsamples) {</div>
|
||
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordflow">if</span> (subsample.clear_bytes > 0) {</div>
|
||
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  memcpy(dest, source, subsample.clear_bytes);</div>
|
||
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  source += subsample.clear_bytes;</div>
|
||
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  dest += subsample.clear_bytes;</div>
|
||
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  total_size += subsample.clear_bytes;</div>
|
||
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  }</div>
|
||
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keywordflow">if</span> (subsample.cipher_bytes > 0) {</div>
|
||
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  EncryptBytes(source, subsample.cipher_bytes, dest);</div>
|
||
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  source += subsample.cipher_bytes;</div>
|
||
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  dest += subsample.cipher_bytes;</div>
|
||
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  total_size += subsample.cipher_bytes;</div>
|
||
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  }</div>
|
||
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  }</div>
|
||
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  DCHECK_EQ(total_size, clear_sample->data_size());</div>
|
||
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  } <span class="keywordflow">else</span> {</div>
|
||
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  EncryptBytes(source, clear_sample->data_size(), dest);</div>
|
||
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  }</div>
|
||
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  </div>
|
||
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  std::shared_ptr<MediaSample> cipher_sample(clear_sample->Clone());</div>
|
||
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  cipher_sample->TransferData(std::move(cipher_sample_data),</div>
|
||
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  clear_sample->data_size());</div>
|
||
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  </div>
|
||
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="comment">// Finish initializing the sample before sending it downstream. We must</span></div>
|
||
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="comment">// wait until now to finish the initialization as we will lose access to</span></div>
|
||
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  <span class="comment">// |decrypt_config| once we set it.</span></div>
|
||
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  cipher_sample->set_is_encrypted(<span class="keyword">true</span>);</div>
|
||
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  std::unique_ptr<DecryptConfig> decrypt_config(<span class="keyword">new</span> DecryptConfig(</div>
|
||
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  encryption_config_->key_id, encryptor_->iv(), subsamples,</div>
|
||
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  protection_scheme_, crypt_byte_block_, skip_byte_block_));</div>
|
||
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  cipher_sample->set_decrypt_config(std::move(decrypt_config));</div>
|
||
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  </div>
|
||
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  encryptor_->UpdateIv();</div>
|
||
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  </div>
|
||
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  <span class="keywordflow">return</span> <a class="code" href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#a9a74fead95bc16255e73908bbebbced9">DispatchMediaSample</a>(kStreamIndex, std::move(cipher_sample));</div>
|
||
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span> }</div>
|
||
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  </div>
|
||
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span> <span class="keywordtype">void</span> EncryptionHandler::SetupProtectionPattern(StreamType stream_type) {</div>
|
||
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="keywordflow">if</span> (stream_type == kStreamVideo &&</div>
|
||
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  IsPatternEncryptionScheme(protection_scheme_)) {</div>
|
||
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  crypt_byte_block_ = encryption_params_.<a class="code" href="../../dc/da0/structshaka_1_1EncryptionParams.html#a87b1deb1705f07c01efa69f14260e0af">crypt_byte_block</a>;</div>
|
||
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  skip_byte_block_ = encryption_params_.<a class="code" href="../../dc/da0/structshaka_1_1EncryptionParams.html#afa236ca5a091603c2bc6d28b1f84d816">skip_byte_block</a>;</div>
|
||
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  } <span class="keywordflow">else</span> {</div>
|
||
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  <span class="comment">// Audio stream in pattern encryption scheme does not use pattern; it uses</span></div>
|
||
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="comment">// whole-block full sample encryption instead. Non-pattern encryption does</span></div>
|
||
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <span class="comment">// not have pattern.</span></div>
|
||
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  crypt_byte_block_ = 0u;</div>
|
||
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  skip_byte_block_ = 0u;</div>
|
||
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  }</div>
|
||
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span> }</div>
|
||
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  </div>
|
||
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span> <span class="keywordtype">bool</span> EncryptionHandler::CreateEncryptor(<span class="keyword">const</span> EncryptionKey& encryption_key) {</div>
|
||
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  std::unique_ptr<AesCryptor> encryptor = encryptor_factory_->CreateEncryptor(</div>
|
||
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  protection_scheme_, crypt_byte_block_, skip_byte_block_, codec_,</div>
|
||
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  encryption_key.key, encryption_key.iv);</div>
|
||
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keywordflow">if</span> (!encryptor)</div>
|
||
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
|
||
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  encryptor_ = std::move(encryptor);</div>
|
||
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  </div>
|
||
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  encryption_config_.reset(<span class="keyword">new</span> EncryptionConfig);</div>
|
||
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  encryption_config_->protection_scheme = protection_scheme_;</div>
|
||
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  encryption_config_->crypt_byte_block = crypt_byte_block_;</div>
|
||
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  encryption_config_->skip_byte_block = skip_byte_block_;</div>
|
||
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  </div>
|
||
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  <span class="keyword">const</span> std::vector<uint8_t>& iv = encryptor_->iv();</div>
|
||
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keywordflow">if</span> (encryptor_->use_constant_iv()) {</div>
|
||
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  encryption_config_->per_sample_iv_size = 0;</div>
|
||
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  encryption_config_->constant_iv = iv;</div>
|
||
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  } <span class="keywordflow">else</span> {</div>
|
||
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  encryption_config_->per_sample_iv_size = <span class="keyword">static_cast<</span>uint8_t<span class="keyword">></span>(iv.size());</div>
|
||
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  }</div>
|
||
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  </div>
|
||
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  encryption_config_->key_id = encryption_key.key_id;</div>
|
||
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  <span class="keyword">const</span> <span class="keyword">auto</span> status = FillProtectionSystemInfo(</div>
|
||
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  encryption_params_, encryption_key, encryption_config_.get());</div>
|
||
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="keywordflow">return</span> status.ok();</div>
|
||
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span> }</div>
|
||
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  </div>
|
||
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span> <span class="keywordtype">void</span> EncryptionHandler::EncryptBytes(<span class="keyword">const</span> uint8_t* source,</div>
|
||
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  <span class="keywordtype">size_t</span> source_size,</div>
|
||
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  uint8_t* dest) {</div>
|
||
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  DCHECK(source);</div>
|
||
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  DCHECK(dest);</div>
|
||
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  DCHECK(encryptor_);</div>
|
||
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  CHECK(encryptor_->Crypt(source, source_size, dest));</div>
|
||
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span> }</div>
|
||
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  </div>
|
||
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span> <span class="keywordtype">void</span> EncryptionHandler::InjectSubsampleGeneratorForTesting(</div>
|
||
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  std::unique_ptr<SubsampleGenerator> generator) {</div>
|
||
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  subsample_generator_ = std::move(generator);</div>
|
||
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span> }</div>
|
||
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  </div>
|
||
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span> <span class="keywordtype">void</span> EncryptionHandler::InjectEncryptorFactoryForTesting(</div>
|
||
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  std::unique_ptr<AesEncryptorFactory> encryptor_factory) {</div>
|
||
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  encryptor_factory_ = std::move(encryptor_factory);</div>
|
||
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span> }</div>
|
||
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  </div>
|
||
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span> } <span class="comment">// namespace media</span></div>
|
||
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span> } <span class="comment">// namespace shaka</span></div>
|
||
</div><!-- fragment --></div><!-- contents -->
|
||
<div class="ttc" id="anamespaceshaka_html_aadc0cc211185374c4bf219da325673aca4a8a926ca6c8454f8249deec51b47e66"><div class="ttname"><a href="../../d8/daf/namespaceshaka.html#aadc0cc211185374c4bf219da325673aca4a8a926ca6c8454f8249deec51b47e66">shaka::ProtectionSystem::kCommon</a></div><div class="ttdeci">@ kCommon</div><div class="ttdoc">The common key system from EME: https://goo.gl/s8RIhr.</div></div>
|
||
<div class="ttc" id="astructshaka_1_1media_1_1SegmentInfo_html"><div class="ttname"><a href="../../d0/dc0/structshaka_1_1media_1_1SegmentInfo.html">shaka::media::SegmentInfo</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d3/d93/media__handler_8h_source.html#l00055">media_handler.h:55</a></div></div>
|
||
<div class="ttc" id="aclassshaka_1_1media_1_1MediaHandler_html_a9a74fead95bc16255e73908bbebbced9"><div class="ttname"><a href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#a9a74fead95bc16255e73908bbebbced9">shaka::media::MediaHandler::DispatchMediaSample</a></div><div class="ttdeci">Status DispatchMediaSample(size_t stream_index, std::shared_ptr< const MediaSample > media_sample) const</div><div class="ttdoc">Dispatch the media sample to downstream handlers.</div><div class="ttdef"><b>Definition:</b> <a href="../../d3/d93/media__handler_8h_source.html#l00207">media_handler.h:207</a></div></div>
|
||
<div class="ttc" id="astructshaka_1_1EncryptionParams_html_a87b1deb1705f07c01efa69f14260e0af"><div class="ttname"><a href="../../dc/da0/structshaka_1_1EncryptionParams.html#a87b1deb1705f07c01efa69f14260e0af">shaka::EncryptionParams::crypt_byte_block</a></div><div class="ttdeci">uint8_t crypt_byte_block</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/d58/crypto__params_8h_source.html#l00174">crypto_params.h:174</a></div></div>
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<div class="ttc" id="anamespaceshaka_html"><div class="ttname"><a href="../../d8/daf/namespaceshaka.html">shaka</a></div><div class="ttdoc">All the methods that are virtual are virtual for mocking.</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d15/gflags__hex__bytes_8cc_source.html#l00011">gflags_hex_bytes.cc:11</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1MediaHandler_html_ad165375cd0a2074c5a740b42f847c499"><div class="ttname"><a href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#ad165375cd0a2074c5a740b42f847c499">shaka::media::MediaHandler::DispatchStreamInfo</a></div><div class="ttdeci">Status DispatchStreamInfo(size_t stream_index, std::shared_ptr< const StreamInfo > stream_info) const</div><div class="ttdoc">Dispatch the stream info to downstream handlers.</div><div class="ttdef"><b>Definition:</b> <a href="../../d3/d93/media__handler_8h_source.html#l00199">media_handler.h:199</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1KeySource_html_af56c833453d65297c4dc96c9d2f83e1a"><div class="ttname"><a href="../../d1/d1f/classshaka_1_1media_1_1KeySource.html#af56c833453d65297c4dc96c9d2f83e1a">shaka::media::KeySource::GetKey</a></div><div class="ttdeci">virtual Status GetKey(const std::string &stream_label, EncryptionKey *key)=0</div></div>
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<div class="ttc" id="aclassshaka_1_1Status_html"><div class="ttname"><a href="../../d2/d20/classshaka_1_1Status.html">shaka::Status</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d1/d13/status_8h_source.html#l00110">status.h:110</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1KeySource_html_aef67793f02b0cd34b57993fab9f789ae"><div class="ttname"><a href="../../d1/d1f/classshaka_1_1media_1_1KeySource.html#aef67793f02b0cd34b57993fab9f789ae">shaka::media::KeySource::GetCryptoPeriodKey</a></div><div class="ttdeci">virtual Status GetCryptoPeriodKey(uint32_t crypto_period_index, uint32_t crypto_period_duration_in_seconds, const std::string &stream_label, EncryptionKey *key)=0</div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1StreamInfo_html_afdd9b2df8ae1c11bb033c44eaba5e38d"><div class="ttname"><a href="../../d5/db1/classshaka_1_1media_1_1StreamInfo.html#afdd9b2df8ae1c11bb033c44eaba5e38d">shaka::media::StreamInfo::Clone</a></div><div class="ttdeci">virtual std::unique_ptr< StreamInfo > Clone() const =0</div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1MediaHandler_html_afe98a4fd19eabe0fc78afc91959c34a6"><div class="ttname"><a href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#afe98a4fd19eabe0fc78afc91959c34a6">shaka::media::MediaHandler::Dispatch</a></div><div class="ttdeci">Status Dispatch(std::unique_ptr< StreamData > stream_data) const</div><div class="ttdef"><b>Definition:</b> <a href="../../d2/de9/media__handler_8cc_source.html#l00094">media_handler.cc:94</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1EncryptionHandler_html_a3f1808a4386081e5e1c9a798a1a69dd0"><div class="ttname"><a href="../../d6/d4c/classshaka_1_1media_1_1EncryptionHandler.html#a3f1808a4386081e5e1c9a798a1a69dd0">shaka::media::EncryptionHandler::InitializeInternal</a></div><div class="ttdeci">Status InitializeInternal() override</div><div class="ttdef"><b>Definition:</b> <a href="../../d3/d9c/encryption__handler_8cc_source.html#l00175">encryption_handler.cc:175</a></div></div>
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<div class="ttc" id="astructshaka_1_1EncryptionParams_html_a1ad46963dc926aa4b72813dccb3f6a45"><div class="ttname"><a href="../../dc/da0/structshaka_1_1EncryptionParams.html#a1ad46963dc926aa4b72813dccb3f6a45">shaka::EncryptionParams::clear_lead_in_seconds</a></div><div class="ttdeci">double clear_lead_in_seconds</div><div class="ttdoc">Clear lead duration in seconds.</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/d58/crypto__params_8h_source.html#l00162">crypto_params.h:162</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1EncryptionHandler_html_a7887e6060eb572036674ecb9a7e045c4"><div class="ttname"><a href="../../d6/d4c/classshaka_1_1media_1_1EncryptionHandler.html#a7887e6060eb572036674ecb9a7e045c4">shaka::media::EncryptionHandler::Process</a></div><div class="ttdeci">Status Process(std::unique_ptr< StreamData > stream_data) override</div><div class="ttdef"><b>Definition:</b> <a href="../../d3/d9c/encryption__handler_8cc_source.html#l00186">encryption_handler.cc:186</a></div></div>
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<div class="ttc" id="astructshaka_1_1EncryptionParams_html_a7686a6aca6a7c3d077a5d7215c39fc51"><div class="ttname"><a href="../../dc/da0/structshaka_1_1EncryptionParams.html#a7686a6aca6a7c3d077a5d7215c39fc51">shaka::EncryptionParams::stream_label_func</a></div><div class="ttdeci">std::function< std::string(const EncryptedStreamAttributes &stream_attributes)> stream_label_func</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/d58/crypto__params_8h_source.html#l00216">crypto_params.h:216</a></div></div>
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<div class="ttc" id="astructshaka_1_1EncryptionParams_html_afa236ca5a091603c2bc6d28b1f84d816"><div class="ttname"><a href="../../dc/da0/structshaka_1_1EncryptionParams.html#afa236ca5a091603c2bc6d28b1f84d816">shaka::EncryptionParams::skip_byte_block</a></div><div class="ttdeci">uint8_t skip_byte_block</div><div class="ttdef"><b>Definition:</b> <a href="../../dd/d58/crypto__params_8h_source.html#l00178">crypto_params.h:178</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1MediaHandler_html_a2acc1c84a61aee93229d493aa93308d5"><div class="ttname"><a href="../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#a2acc1c84a61aee93229d493aa93308d5">shaka::media::MediaHandler::DispatchSegmentInfo</a></div><div class="ttdeci">Status DispatchSegmentInfo(size_t stream_index, std::shared_ptr< const SegmentInfo > segment_info) const</div><div class="ttdoc">Dispatch the segment info to downstream handlers.</div><div class="ttdef"><b>Definition:</b> <a href="../../d3/d93/media__handler_8h_source.html#l00224">media_handler.h:224</a></div></div>
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<div class="ttc" id="aclassshaka_1_1media_1_1StreamInfo_html"><div class="ttname"><a href="../../d5/db1/classshaka_1_1media_1_1StreamInfo.html">shaka::media::StreamInfo</a></div><div class="ttdoc">Abstract class holds stream information.</div><div class="ttdef"><b>Definition:</b> <a href="../../d8/daa/stream__info_8h_source.html#l00065">stream_info.h:65</a></div></div>
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