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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_e3bda0bde998a4d5063328245b9909be.html">base</a></li> </ul>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2014 Google Inc. All rights reserved.</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">//</span></div><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><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><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">//</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// AES Encryptor implementation using openssl.</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#ifndef PACKAGER_MEDIA_BASE_AES_ENCRYPTOR_H_</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#define PACKAGER_MEDIA_BASE_AES_ENCRYPTOR_H_</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include <string></span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include <vector></span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "packager/base/macros.h"</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include "packager/media/base/aes_cryptor.h"</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">namespace </span><a class="code" href="../../d8/daf/namespaceshaka.html">shaka</a> {</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">namespace </span>media {</div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00021"></a><span class="lineno"><a class="line" href="../../d3/d75/classshaka_1_1media_1_1AesEncryptor.html"> 21</a></span> <span class="keyword">class </span><a class="code" href="../../d3/d75/classshaka_1_1media_1_1AesEncryptor.html">AesEncryptor</a> : <span class="keyword">public</span> <a class="code" href="../../df/d87/classshaka_1_1media_1_1AesCryptor.html">AesCryptor</a> {</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keyword">explicit</span> <a class="code" href="../../d3/d75/classshaka_1_1media_1_1AesEncryptor.html#a873b0794baca91b36dbc484fc9c37e58">AesEncryptor</a>(ConstantIvFlag constant_iv_flag);</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  ~<a class="code" href="../../d3/d75/classshaka_1_1media_1_1AesEncryptor.html">AesEncryptor</a>() <span class="keyword">override</span>;</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keywordtype">bool</span> <a class="code" href="../../d3/d75/classshaka_1_1media_1_1AesEncryptor.html#a0695df5615cadf6977fdbac978daeffa">InitializeWithIv</a>(<span class="keyword">const</span> std::vector<uint8_t>& key,</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keyword">const</span> std::vector<uint8_t>& <a class="code" href="../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a15094d3249fa0b82b8acc4d52209c51e">iv</a>) <span class="keyword">override</span>;</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  DISALLOW_COPY_AND_ASSIGN(<a class="code" href="../../d3/d75/classshaka_1_1media_1_1AesEncryptor.html">AesEncryptor</a>);</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> </div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment">// Class which implements AES-CTR counter-mode encryption.</span></div><div class="line"><a name="l00042"></a><span class="lineno"><a class="line" href="../../d0/dd8/classshaka_1_1media_1_1AesCtrEncryptor.html"> 42</a></span> <span class="keyword">class </span><a class="code" href="../../d0/dd8/classshaka_1_1media_1_1AesCtrEncryptor.html">AesCtrEncryptor</a> : <span class="keyword">public</span> <a class="code" href="../../d3/d75/classshaka_1_1media_1_1AesEncryptor.html">AesEncryptor</a> {</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <a class="code" href="../../d0/dd8/classshaka_1_1media_1_1AesCtrEncryptor.html">AesCtrEncryptor</a>();</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  ~<a class="code" href="../../d0/dd8/classshaka_1_1media_1_1AesCtrEncryptor.html">AesCtrEncryptor</a>() <span class="keyword">override</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>  uint32_t block_offset()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> block_offset_; }</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordtype">bool</span> CryptInternal(<span class="keyword">const</span> uint8_t* plaintext,</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordtype">size_t</span> plaintext_size,</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  uint8_t* ciphertext,</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordtype">size_t</span>* ciphertext_size) <span class="keyword">override</span>;</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordtype">void</span> SetIvInternal() <span class="keyword">override</span>;</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="comment">// Current block offset.</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  uint32_t block_offset_;</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="comment">// Current AES-CTR counter.</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  std::vector<uint8_t> counter_;</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="comment">// Encrypted counter.</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  std::vector<uint8_t> encrypted_counter_;</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  DISALLOW_COPY_AND_ASSIGN(<a class="code" href="../../d0/dd8/classshaka_1_1media_1_1AesCtrEncryptor.html">AesCtrEncryptor</a>);</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> };</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> <span class="keyword">enum</span> CbcPaddingScheme {</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="comment">// Residual block is left unencrypted.</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  kNoPadding,</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">// Residual block is padded with pkcs5 and encrypted.</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  kPkcs5Padding,</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="comment">// Residual block and the next-to-last block are encrypted using ciphertext</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="comment">// stealing method.</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  kCtsPadding,</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> };</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment">// Class which implements AES-CBC (Cipher block chaining) encryption.</span></div><div class="line"><a name="l00077"></a><span class="lineno"><a class="line" href="../../d4/d20/classshaka_1_1media_1_1AesCbcEncryptor.html"> 77</a></span> <span class="keyword">class </span><a class="code" href="../../d4/d20/classshaka_1_1media_1_1AesCbcEncryptor.html">AesCbcEncryptor</a> : <span class="keyword">public</span> <a class="code" href="../../d3/d75/classshaka_1_1media_1_1AesEncryptor.html">AesEncryptor</a> {</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">public</span>:</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keyword">explicit</span> <a class="code" href="../../d4/d20/classshaka_1_1media_1_1AesCbcEncryptor.html">AesCbcEncryptor</a>(CbcPaddingScheme padding_scheme);</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <a class="code" href="../../d4/d20/classshaka_1_1media_1_1AesCbcEncryptor.html">AesCbcEncryptor</a>(CbcPaddingScheme padding_scheme,</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  ConstantIvFlag constant_iv_flag);</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  ~<a class="code" href="../../d4/d20/classshaka_1_1media_1_1AesCbcEncryptor.html">AesCbcEncryptor</a>() <span class="keyword">override</span>;</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keyword">private</span>:</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordtype">bool</span> CryptInternal(<span class="keyword">const</span> uint8_t* plaintext,</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordtype">size_t</span> plaintext_size,</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  uint8_t* ciphertext,</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordtype">size_t</span>* ciphertext_size) <span class="keyword">override</span>;</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordtype">void</span> SetIvInternal() <span class="keyword">override</span>;</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordtype">size_t</span> NumPaddingBytes(<span class="keywordtype">size_t</span> size) <span class="keyword">const override</span>;</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keyword">const</span> CbcPaddingScheme padding_scheme_;</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="comment">// 16-byte internal iv for crypto operations.</span></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  std::vector<uint8_t> internal_iv_;</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  DISALLOW_COPY_AND_ASSIGN(<a class="code" href="../../d4/d20/classshaka_1_1media_1_1AesCbcEncryptor.html">AesCbcEncryptor</a>);</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> };</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> </div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> } <span class="comment">// namespace media</span></div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> } <span class="comment">// namespace shaka</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="preprocessor">#endif // PACKAGER_MEDIA_BASE_AES_ENCRYPTOR_H_</span></div><div class="ttc" id="classshaka_1_1media_1_1AesCryptor_html"><div class="ttname"><a href="../../df/d87/classshaka_1_1media_1_1AesCryptor.html">shaka::media::AesCryptor</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d42/aes__cryptor_8h_source.html#l00025">aes_cryptor.h:25</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1AesEncryptor_html_a0695df5615cadf6977fdbac978daeffa"><div class="ttname"><a href="../../d3/d75/classshaka_1_1media_1_1AesEncryptor.html#a0695df5615cadf6977fdbac978daeffa">shaka::media::AesEncryptor::InitializeWithIv</a></div><div class="ttdeci">bool InitializeWithIv(const std::vector< uint8_t > &key, const std::vector< uint8_t > &iv) override</div><div class="ttdef"><b>Definition:</b> <a href="../../d5/da4/aes__encryptor_8cc_source.html#l00039">aes_encryptor.cc:39</a></div></div>
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<div class="ttc" id="namespaceshaka_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="classshaka_1_1media_1_1AesEncryptor_html_a873b0794baca91b36dbc484fc9c37e58"><div class="ttname"><a href="../../d3/d75/classshaka_1_1media_1_1AesEncryptor.html#a873b0794baca91b36dbc484fc9c37e58">shaka::media::AesEncryptor::AesEncryptor</a></div><div class="ttdeci">AesEncryptor(ConstantIvFlag constant_iv_flag)</div><div class="ttdef"><b>Definition:</b> <a href="../../d5/da4/aes__encryptor_8cc_source.html#l00035">aes_encryptor.cc:35</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1AesCbcEncryptor_html"><div class="ttname"><a href="../../d4/d20/classshaka_1_1media_1_1AesCbcEncryptor.html">shaka::media::AesCbcEncryptor</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d1/df0/aes__encryptor_8h_source.html#l00077">aes_encryptor.h:77</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1AesCryptor_html_a15094d3249fa0b82b8acc4d52209c51e"><div class="ttname"><a href="../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a15094d3249fa0b82b8acc4d52209c51e">shaka::media::AesCryptor::iv</a></div><div class="ttdeci">const std::vector< uint8_t > & iv() const</div><div class="ttdef"><b>Definition:</b> <a href="../../d0/d42/aes__cryptor_8h_source.html#l00082">aes_cryptor.h:82</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1AesCtrEncryptor_html"><div class="ttname"><a href="../../d0/dd8/classshaka_1_1media_1_1AesCtrEncryptor.html">shaka::media::AesCtrEncryptor</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d1/df0/aes__encryptor_8h_source.html#l00042">aes_encryptor.h:42</a></div></div>
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<div class="ttc" id="classshaka_1_1media_1_1AesEncryptor_html"><div class="ttname"><a href="../../d3/d75/classshaka_1_1media_1_1AesEncryptor.html">shaka::media::AesEncryptor</a></div><div class="ttdef"><b>Definition:</b> <a href="../../d1/df0/aes__encryptor_8h_source.html#l00021">aes_encryptor.h:21</a></div></div>
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