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<div class="title">rsa_key.cc</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">// Copyright 2014 Google Inc. All rights reserved.</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<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>&#160;<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>&#160;<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>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment">// RSA signature details:</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment">// Algorithm: RSASSA-PSS</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment">// Hash algorithm: SHA1</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment">// Mask generation function: mgf1SHA1</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment">// Salt length: 20 bytes</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment">// Trailer field: 0xbc</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment">// RSA encryption details:</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment">// Algorithm: RSA-OAEP</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment">// Mask generation function: mgf1SHA1</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="comment">// Label (encoding paramter): empty std::string</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="preprocessor">#include &quot;packager/media/base/rsa_key.h&quot;</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="preprocessor">#include &lt;openssl/err.h&gt;</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="preprocessor">#include &lt;openssl/rsa.h&gt;</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="preprocessor">#include &lt;openssl/x509.h&gt;</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="preprocessor">#include &quot;packager/base/logging.h&quot;</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="preprocessor">#include &quot;packager/base/sha1.h&quot;</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="preprocessor">#include &quot;packager/base/stl_util.h&quot;</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="keyword">namespace </span>{</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="keyword">const</span> <span class="keywordtype">size_t</span> kPssSaltLength = 20u;</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;<span class="comment">// Serialize rsa key from DER encoded PKCS#1 RSAPrivateKey.</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;RSA* DeserializeRsaKey(<span class="keyword">const</span> std::string&amp; serialized_key,</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; <span class="keywordtype">bool</span> deserialize_private_key) {</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; <span class="keywordflow">if</span> (serialized_key.empty()) {</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;Serialized RSA Key is empty.&quot;</span>;</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; }</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; BIO* bio = BIO_new_mem_buf(const_cast&lt;char*&gt;(serialized_key.data()),</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; serialized_key.size());</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; <span class="keywordflow">if</span> (bio == NULL) {</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;BIO_new_mem_buf returned NULL.&quot;</span>;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; }</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; RSA* rsa_key = deserialize_private_key ? d2i_RSAPrivateKey_bio(bio, NULL)</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; : d2i_RSAPublicKey_bio(bio, NULL);</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; BIO_free(bio);</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; <span class="keywordflow">return</span> rsa_key;</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160;}</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;RSA* DeserializeRsaPrivateKey(<span class="keyword">const</span> std::string&amp; serialized_key) {</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; RSA* rsa_key = DeserializeRsaKey(serialized_key, <span class="keyword">true</span>);</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="keywordflow">if</span> (!rsa_key) {</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;Private RSA key deserialization failure.&quot;</span>;</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; }</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="keywordflow">if</span> (RSA_check_key(rsa_key) != 1) {</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;Invalid RSA Private key: &quot;</span> &lt;&lt; ERR_error_string(</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; ERR_get_error(), NULL);</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; RSA_free(rsa_key);</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; }</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keywordflow">return</span> rsa_key;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;}</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160;</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;RSA* DeserializeRsaPublicKey(<span class="keyword">const</span> std::string&amp; serialized_key) {</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; RSA* rsa_key = DeserializeRsaKey(serialized_key, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160; <span class="keywordflow">if</span> (!rsa_key) {</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;Private RSA key deserialization failure.&quot;</span>;</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; }</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="keywordflow">if</span> (RSA_size(rsa_key) &lt;= 0) {</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;Invalid RSA Public key: &quot;</span> &lt;&lt; ERR_error_string(</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; ERR_get_error(), NULL);</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; RSA_free(rsa_key);</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; }</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keywordflow">return</span> rsa_key;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160;}</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160;</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160;} <span class="comment">// namespace</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;<span class="keyword">namespace </span>edash_packager {</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160;<span class="keyword">namespace </span>media {</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160;RsaPrivateKey::RsaPrivateKey(RSA* rsa_key) : rsa_key_(rsa_key) {</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; DCHECK(rsa_key);</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160;}</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160;RsaPrivateKey::~RsaPrivateKey() {</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; <span class="keywordflow">if</span> (rsa_key_ != NULL)</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; RSA_free(rsa_key_);</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160;}</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160;</div>
<div class="line"><a name="l00097"></a><span class="lineno"><a class="line" href="../../d5/d62/classedash__packager_1_1media_1_1RsaPrivateKey.html#a9360becce7c1e7be0bdecf2ce411b871"> 97</a></span>&#160;<a class="code" href="../../d5/d62/classedash__packager_1_1media_1_1RsaPrivateKey.html">RsaPrivateKey</a>* <a class="code" href="../../d5/d62/classedash__packager_1_1media_1_1RsaPrivateKey.html#a9360becce7c1e7be0bdecf2ce411b871">RsaPrivateKey::Create</a>(<span class="keyword">const</span> std::string&amp; serialized_key) {</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; RSA* rsa_key = DeserializeRsaPrivateKey(serialized_key);</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; <span class="keywordflow">return</span> rsa_key == NULL ? NULL : <span class="keyword">new</span> <a class="code" href="../../d5/d62/classedash__packager_1_1media_1_1RsaPrivateKey.html">RsaPrivateKey</a>(rsa_key);</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160;}</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160;</div>
<div class="line"><a name="l00102"></a><span class="lineno"><a class="line" href="../../d5/d62/classedash__packager_1_1media_1_1RsaPrivateKey.html#a5356e2154dfc0707df39f603932ed96b"> 102</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="../../d5/d62/classedash__packager_1_1media_1_1RsaPrivateKey.html#a5356e2154dfc0707df39f603932ed96b">RsaPrivateKey::Decrypt</a>(<span class="keyword">const</span> std::string&amp; encrypted_message,</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; std::string* decrypted_message) {</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; DCHECK(decrypted_message);</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160;</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; <span class="keywordtype">size_t</span> rsa_size = RSA_size(rsa_key_);</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; <span class="keywordflow">if</span> (encrypted_message.size() != rsa_size) {</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;Encrypted RSA message has the wrong size (expected &quot;</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; &lt;&lt; rsa_size &lt;&lt; <span class="stringliteral">&quot;, actual &quot;</span> &lt;&lt; encrypted_message.size() &lt;&lt; <span class="stringliteral">&quot;).&quot;</span>;</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; }</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160;</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; decrypted_message-&gt;resize(rsa_size);</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; <span class="keywordtype">int</span> decrypted_size = RSA_private_decrypt(</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; rsa_size,</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; reinterpret_cast&lt;const uint8_t*&gt;(encrypted_message.data()),</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; reinterpret_cast&lt;uint8_t*&gt;(string_as_array(decrypted_message)),</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; rsa_key_,</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; RSA_PKCS1_OAEP_PADDING);</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160;</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; <span class="keywordflow">if</span> (decrypted_size == -1) {</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;RSA private decrypt failure: &quot;</span> &lt;&lt; ERR_error_string(</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; ERR_get_error(), NULL);</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; }</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; decrypted_message-&gt;resize(decrypted_size);</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160;}</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160;</div>
<div class="line"><a name="l00130"></a><span class="lineno"><a class="line" href="../../d5/d62/classedash__packager_1_1media_1_1RsaPrivateKey.html#ab402109f8456af90f3cc34cee76184d9"> 130</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="../../d5/d62/classedash__packager_1_1media_1_1RsaPrivateKey.html#ab402109f8456af90f3cc34cee76184d9">RsaPrivateKey::GenerateSignature</a>(<span class="keyword">const</span> std::string&amp; message,</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; std::string* signature) {</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; DCHECK(signature);</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160; <span class="keywordflow">if</span> (message.empty()) {</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;Message to be signed is empty.&quot;</span>;</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; }</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160;</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160; std::string message_digest = base::SHA1HashString(message);</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>&#160;</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160; <span class="comment">// Add PSS padding.</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; <span class="keywordtype">size_t</span> rsa_size = RSA_size(rsa_key_);</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; std::vector&lt;uint8_t&gt; padded_digest(rsa_size);</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160; <span class="keywordflow">if</span> (!RSA_padding_add_PKCS1_PSS_mgf1(</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160; rsa_key_,</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160; &amp;padded_digest[0],</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160; reinterpret_cast&lt;uint8_t*&gt;(string_as_array(&amp;message_digest)),</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; EVP_sha1(),</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160; EVP_sha1(),</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; kPssSaltLength)) {</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;RSA padding failure: &quot;</span> &lt;&lt; ERR_error_string(ERR_get_error(),</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; NULL);</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; }</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160; <span class="comment">// Encrypt PSS padded digest.</span></div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160; signature-&gt;resize(rsa_size);</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160; <span class="keywordtype">int</span> signature_size = RSA_private_encrypt(</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160; padded_digest.size(),</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160; &amp;padded_digest[0],</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; <span class="keyword">reinterpret_cast&lt;</span>uint8_t*<span class="keyword">&gt;</span>(string_as_array(signature)),</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160; rsa_key_,</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160; RSA_NO_PADDING);</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160;</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160; <span class="keywordflow">if</span> (signature_size != static_cast&lt;int&gt;(rsa_size)) {</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;RSA private encrypt failure: &quot;</span> &lt;&lt; ERR_error_string(</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160; ERR_get_error(), NULL);</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; }</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160;}</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160;</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160;RsaPublicKey::RsaPublicKey(RSA* rsa_key) : rsa_key_(rsa_key) {</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; DCHECK(rsa_key);</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160;}</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160;RsaPublicKey::~RsaPublicKey() {</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160; <span class="keywordflow">if</span> (rsa_key_ != NULL)</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160; RSA_free(rsa_key_);</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160;}</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160;</div>
<div class="line"><a name="l00180"></a><span class="lineno"><a class="line" href="../../d1/d86/classedash__packager_1_1media_1_1RsaPublicKey.html#a21f9009c9654f141676ef05f0436baa4"> 180</a></span>&#160;<a class="code" href="../../d1/d86/classedash__packager_1_1media_1_1RsaPublicKey.html">RsaPublicKey</a>* <a class="code" href="../../d1/d86/classedash__packager_1_1media_1_1RsaPublicKey.html#a21f9009c9654f141676ef05f0436baa4">RsaPublicKey::Create</a>(<span class="keyword">const</span> std::string&amp; serialized_key) {</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160; RSA* rsa_key = DeserializeRsaPublicKey(serialized_key);</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; <span class="keywordflow">return</span> rsa_key == NULL ? NULL : <span class="keyword">new</span> <a class="code" href="../../d1/d86/classedash__packager_1_1media_1_1RsaPublicKey.html">RsaPublicKey</a>(rsa_key);</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160;}</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160;</div>
<div class="line"><a name="l00185"></a><span class="lineno"><a class="line" href="../../d1/d86/classedash__packager_1_1media_1_1RsaPublicKey.html#a287216e5bb6ac3781388db23329a8f27"> 185</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="../../d1/d86/classedash__packager_1_1media_1_1RsaPublicKey.html#a287216e5bb6ac3781388db23329a8f27">RsaPublicKey::Encrypt</a>(<span class="keyword">const</span> std::string&amp; clear_message,</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160; std::string* encrypted_message) {</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; DCHECK(encrypted_message);</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160; <span class="keywordflow">if</span> (clear_message.empty()) {</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;Message to be encrypted is empty.&quot;</span>;</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160; }</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160;</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; <span class="keywordtype">size_t</span> rsa_size = RSA_size(rsa_key_);</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>&#160; encrypted_message-&gt;resize(rsa_size);</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>&#160; <span class="keywordtype">int</span> encrypted_size = RSA_public_encrypt(</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160; clear_message.size(),</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160; <span class="keyword">reinterpret_cast&lt;</span><span class="keyword">const </span>uint8_t*<span class="keyword">&gt;</span>(clear_message.data()),</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160; reinterpret_cast&lt;uint8_t*&gt;(string_as_array(encrypted_message)),</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160; rsa_key_,</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160; RSA_PKCS1_OAEP_PADDING);</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160;</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160; <span class="keywordflow">if</span> (encrypted_size != static_cast&lt;int&gt;(rsa_size)) {</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;RSA public encrypt failure: &quot;</span> &lt;&lt; ERR_error_string(</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; ERR_get_error(), NULL);</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; }</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160;}</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160;</div>
<div class="line"><a name="l00210"></a><span class="lineno"><a class="line" href="../../d1/d86/classedash__packager_1_1media_1_1RsaPublicKey.html#ae83681d1c03c880b4a0e95e7efe61673"> 210</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="../../d1/d86/classedash__packager_1_1media_1_1RsaPublicKey.html#ae83681d1c03c880b4a0e95e7efe61673">RsaPublicKey::VerifySignature</a>(<span class="keyword">const</span> std::string&amp; message,</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; <span class="keyword">const</span> std::string&amp; signature) {</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; <span class="keywordflow">if</span> (message.empty()) {</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;Signed message is empty.&quot;</span>;</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; }</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160;</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160; <span class="keywordtype">size_t</span> rsa_size = RSA_size(rsa_key_);</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; <span class="keywordflow">if</span> (signature.size() != rsa_size) {</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;Message signature is of the wrong size (expected &quot;</span></div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160; &lt;&lt; rsa_size &lt;&lt; <span class="stringliteral">&quot;, actual &quot;</span> &lt;&lt; signature.size() &lt;&lt; <span class="stringliteral">&quot;).&quot;</span>;</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; }</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160;</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160; <span class="comment">// Decrypt the signature.</span></div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160; std::vector&lt;uint8_t&gt; padded_digest(signature.size());</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160; <span class="keywordtype">int</span> decrypted_size =</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160; RSA_public_decrypt(signature.size(),</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160; <span class="keyword">reinterpret_cast&lt;</span><span class="keyword">const </span>uint8_t*<span class="keyword">&gt;</span>(signature.data()),</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160; &amp;padded_digest[0],</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>&#160; rsa_key_,</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160; RSA_NO_PADDING);</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>&#160;</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>&#160; <span class="keywordflow">if</span> (decrypted_size != static_cast&lt;int&gt;(rsa_size)) {</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>&#160; LOG(ERROR) &lt;&lt; <span class="stringliteral">&quot;RSA public decrypt failure: &quot;</span> &lt;&lt; ERR_error_string(</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160; ERR_get_error(), NULL);</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>&#160; <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160; }</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160;</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160; std::string message_digest = base::SHA1HashString(message);</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>&#160;</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160; <span class="comment">// Verify PSS padding.</span></div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>&#160; <span class="keywordflow">return</span> RSA_verify_PKCS1_PSS_mgf1(</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>&#160; rsa_key_,</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>&#160; reinterpret_cast&lt;const uint8_t*&gt;(message_digest.data()),</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>&#160; EVP_sha1(),</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>&#160; EVP_sha1(),</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>&#160; &amp;padded_digest[0],</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>&#160; kPssSaltLength) != 0;</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>&#160;}</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160;</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160;} <span class="comment">// namespace media</span></div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160;} <span class="comment">// namespace edash_packager</span></div>
<div class="ttc" id="classedash__packager_1_1media_1_1RsaPrivateKey_html_a5356e2154dfc0707df39f603932ed96b"><div class="ttname"><a href="../../d5/d62/classedash__packager_1_1media_1_1RsaPrivateKey.html#a5356e2154dfc0707df39f603932ed96b">edash_packager::media::RsaPrivateKey::Decrypt</a></div><div class="ttdeci">bool Decrypt(const std::string &amp;encrypted_message, std::string *decrypted_message)</div><div class="ttdef"><b>Definition:</b> <a href="../../dc/dd9/rsa__key_8cc_source.html#l00102">rsa_key.cc:102</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1RsaPrivateKey_html_ab402109f8456af90f3cc34cee76184d9"><div class="ttname"><a href="../../d5/d62/classedash__packager_1_1media_1_1RsaPrivateKey.html#ab402109f8456af90f3cc34cee76184d9">edash_packager::media::RsaPrivateKey::GenerateSignature</a></div><div class="ttdeci">bool GenerateSignature(const std::string &amp;message, std::string *signature)</div><div class="ttdef"><b>Definition:</b> <a href="../../dc/dd9/rsa__key_8cc_source.html#l00130">rsa_key.cc:130</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1RsaPrivateKey_html_a9360becce7c1e7be0bdecf2ce411b871"><div class="ttname"><a href="../../d5/d62/classedash__packager_1_1media_1_1RsaPrivateKey.html#a9360becce7c1e7be0bdecf2ce411b871">edash_packager::media::RsaPrivateKey::Create</a></div><div class="ttdeci">static RsaPrivateKey * Create(const std::string &amp;serialized_key)</div><div class="ttdef"><b>Definition:</b> <a href="../../dc/dd9/rsa__key_8cc_source.html#l00097">rsa_key.cc:97</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1RsaPublicKey_html_a21f9009c9654f141676ef05f0436baa4"><div class="ttname"><a href="../../d1/d86/classedash__packager_1_1media_1_1RsaPublicKey.html#a21f9009c9654f141676ef05f0436baa4">edash_packager::media::RsaPublicKey::Create</a></div><div class="ttdeci">static RsaPublicKey * Create(const std::string &amp;serialized_key)</div><div class="ttdef"><b>Definition:</b> <a href="../../dc/dd9/rsa__key_8cc_source.html#l00180">rsa_key.cc:180</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1RsaPublicKey_html_ae83681d1c03c880b4a0e95e7efe61673"><div class="ttname"><a href="../../d1/d86/classedash__packager_1_1media_1_1RsaPublicKey.html#ae83681d1c03c880b4a0e95e7efe61673">edash_packager::media::RsaPublicKey::VerifySignature</a></div><div class="ttdeci">bool VerifySignature(const std::string &amp;message, const std::string &amp;signature)</div><div class="ttdef"><b>Definition:</b> <a href="../../dc/dd9/rsa__key_8cc_source.html#l00210">rsa_key.cc:210</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1RsaPublicKey_html_a287216e5bb6ac3781388db23329a8f27"><div class="ttname"><a href="../../d1/d86/classedash__packager_1_1media_1_1RsaPublicKey.html#a287216e5bb6ac3781388db23329a8f27">edash_packager::media::RsaPublicKey::Encrypt</a></div><div class="ttdeci">bool Encrypt(const std::string &amp;clear_message, std::string *encrypted_message)</div><div class="ttdef"><b>Definition:</b> <a href="../../dc/dd9/rsa__key_8cc_source.html#l00185">rsa_key.cc:185</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1RsaPublicKey_html"><div class="ttname"><a href="../../d1/d86/classedash__packager_1_1media_1_1RsaPublicKey.html">edash_packager::media::RsaPublicKey</a></div><div class="ttdoc">Rsa public key, used for signature verification and encryption. </div><div class="ttdef"><b>Definition:</b> <a href="../../d5/dcf/rsa__key_8h_source.html#l00053">rsa_key.h:53</a></div></div>
<div class="ttc" id="classedash__packager_1_1media_1_1RsaPrivateKey_html"><div class="ttname"><a href="../../d5/d62/classedash__packager_1_1media_1_1RsaPrivateKey.html">edash_packager::media::RsaPrivateKey</a></div><div class="ttdoc">Rsa private key, used for message signing and decryption. </div><div class="ttdef"><b>Definition:</b> <a href="../../d5/dcf/rsa__key_8h_source.html#l00024">rsa_key.h:24</a></div></div>
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