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<div class="title">osrng.cpp</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// osrng.cpp - originally written and placed in the public domain by Wei Dai</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> </div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Thanks to Leonard Janke for the suggestion for AutoSeededRandomPool.</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> </div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include "<a class="code" href="pch_8h.html">pch.h</a>"</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#include "<a class="code" href="config_8h.html">config.h</a>"</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> </div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#ifndef CRYPTOPP_IMPORTS</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> </div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// Win32 has CryptoAPI and <wincrypt.h>. Windows 10 and Windows Store 10 have CNG and <bcrypt.h>.</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// There's a hole for Windows Phone 8 and Windows Store 8. There is no userland crypto available.</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// Also see http://stackoverflow.com/questions/36974545/random-numbers-for-windows-phone-8-and-windows-store-8</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#if defined(CRYPTOPP_WIN32_AVAILABLE) && !defined(OS_RNG_AVAILABLE)</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor"># pragma message("WARNING: Compiling for Windows but an OS RNG is not available. This is likely a Windows Phone 8 or Windows Store 8 app.")</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#if !defined(NO_OS_DEPENDENCE) && defined(OS_RNG_AVAILABLE)</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include "<a class="code" href="osrng_8h.html">osrng.h</a>"</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include "<a class="code" href="rng_8h.html">rng.h</a>"</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#ifdef CRYPTOPP_WIN32_AVAILABLE</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#define WIN32_LEAN_AND_MEAN</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <windows.h></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#if defined(USE_MS_CRYPTOAPI)</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <wincrypt.h></span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#ifndef CRYPT_NEWKEYSET</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor"># define CRYPT_NEWKEYSET 0x00000008</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#ifndef CRYPT_MACHINE_KEYSET</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor"># define CRYPT_MACHINE_KEYSET 0x00000020</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#elif defined(USE_MS_CNGAPI)</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include <bcrypt.h></span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#ifndef BCRYPT_SUCCESS</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor"># define BCRYPT_SUCCESS(Status) (((NTSTATUS)(Status)) >= 0)</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#ifndef STATUS_INVALID_PARAMETER</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor"># define STATUS_INVALID_PARAMETER 0xC000000D</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#ifndef STATUS_INVALID_HANDLE</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor"># define STATUS_INVALID_HANDLE 0xC0000008</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#endif</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> <span class="preprocessor">#ifdef CRYPTOPP_UNIX_AVAILABLE</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor">#include <errno.h></span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#include <fcntl.h></span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#include <unistd.h></span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> NAMESPACE_BEGIN(<a class="code" href="namespace_crypto_p_p.html">CryptoPP</a>)</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor">#if defined(NONBLOCKING_RNG_AVAILABLE) || defined(BLOCKING_RNG_AVAILABLE)</span></div><div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="class_o_s___r_n_g___err.html#aac1ad9f91292d8ab1a3816f637941cc7"> 56</a></span> <a class="code" href="class_o_s___r_n_g___err.html#aac1ad9f91292d8ab1a3816f637941cc7">OS_RNG_Err::OS_RNG_Err</a>(<span class="keyword">const</span> std::string &operation)</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  : <a class="code" href="class_exception.html">Exception</a>(OTHER_ERROR, <span class="stringliteral">"OS_Rng: "</span> + operation + <span class="stringliteral">" operation failed with error "</span> +</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> #ifdef CRYPTOPP_WIN32_AVAILABLE</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="stringliteral">"0x"</span> + <a class="code" href="misc_8h.html#a6cd7decd035cc4e144cd3d395e834106">IntToString</a>(GetLastError(), 16)</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> #else</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <a class="code" href="misc_8h.html#a6cd7decd035cc4e144cd3d395e834106">IntToString</a>(errno)</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> #endif</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> {</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="preprocessor">#endif</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#ifdef NONBLOCKING_RNG_AVAILABLE</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#ifdef CRYPTOPP_WIN32_AVAILABLE</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="preprocessor">#if defined(USE_MS_CNGAPI)</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="keyword">inline</span> DWORD NtStatusToErrorCode(NTSTATUS status)</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>  <span class="keywordflow">if</span> (status == STATUS_INVALID_PARAMETER)</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">return</span> ERROR_INVALID_PARAMETER;</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (status == STATUS_INVALID_HANDLE)</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordflow">return</span> ERROR_INVALID_HANDLE;</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">return</span> (DWORD)status;</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> }</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="preprocessor">#if defined(UNICODE) || defined(_UNICODE)</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor"># define CRYPTOPP_CONTAINER L"Crypto++ RNG"</span></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor"># define CRYPTOPP_CONTAINER "Crypto++ RNG"</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div><div class="line"><a name="l00090"></a><span class="lineno"><a class="line" href="class_microsoft_crypto_provider.html#a7da7375ab68892b8237bd682e13c5ab4"> 90</a></span> <a class="code" href="class_microsoft_crypto_provider.html#a7da7375ab68892b8237bd682e13c5ab4">MicrosoftCryptoProvider::MicrosoftCryptoProvider</a>() : m_hProvider(0)</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> {</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="preprocessor">#if defined(USE_MS_CRYPTOAPI)</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="comment">// See http://support.microsoft.com/en-us/kb/238187 for CRYPT_NEWKEYSET fallback strategy</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">if</span> (!CryptAcquireContext(&m_hProvider, 0, 0, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT))</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  {</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keyword">const</span> DWORD firstErr = GetLastError();</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">if</span> (!CryptAcquireContext(&m_hProvider, CRYPTOPP_CONTAINER, 0, PROV_RSA_FULL, CRYPT_NEWKEYSET <span class="comment">/*user*/</span>) &&</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  !CryptAcquireContext(&m_hProvider, CRYPTOPP_CONTAINER, 0, PROV_RSA_FULL, CRYPT_MACHINE_KEYSET|CRYPT_NEWKEYSET))</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  {</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="comment">// Set original error with original code</span></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  SetLastError(firstErr);</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">throw</span> <a class="code" href="class_o_s___r_n_g___err.html">OS_RNG_Err</a>(<span class="stringliteral">"CryptAcquireContext"</span>);</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</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="preprocessor">#elif defined(USE_MS_CNGAPI)</span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  NTSTATUS ret = BCryptOpenAlgorithmProvider(&m_hProvider, BCRYPT_RNG_ALGORITHM, MS_PRIMITIVE_PROVIDER, 0);</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">if</span> (!(BCRYPT_SUCCESS(ret)))</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>  <span class="comment">// Hack... OS_RNG_Err calls GetLastError()</span></div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  SetLastError(NtStatusToErrorCode(ret));</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordflow">throw</span> <a class="code" href="class_o_s___r_n_g___err.html">OS_RNG_Err</a>(<span class="stringliteral">"BCryptOpenAlgorithmProvider"</span>);</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> <span class="preprocessor">#endif</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> </div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> MicrosoftCryptoProvider::~MicrosoftCryptoProvider()</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> {</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="preprocessor">#if defined(USE_MS_CRYPTOAPI)</span></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">if</span> (m_hProvider)</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  CryptReleaseContext(m_hProvider, 0);</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="preprocessor">#elif defined(USE_MS_CNGAPI)</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">if</span> (m_hProvider)</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  BCryptCloseAlgorithmProvider(m_hProvider, 0);</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> }</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="preprocessor">#endif // CRYPTOPP_WIN32_AVAILABLE</span></div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> </div><div class="line"><a name="l00129"></a><span class="lineno"><a class="line" href="class_nonblocking_rng.html#a09b27b1803636bdd60a64f7f587433ed"> 129</a></span> <a class="code" href="class_nonblocking_rng.html#a09b27b1803636bdd60a64f7f587433ed">NonblockingRng::NonblockingRng</a>()</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> {</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="preprocessor">#ifndef CRYPTOPP_WIN32_AVAILABLE</span></div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  m_fd = open(<span class="stringliteral">"/dev/urandom"</span>,O_RDONLY);</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">if</span> (m_fd == -1)</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordflow">throw</span> <a class="code" href="class_o_s___r_n_g___err.html">OS_RNG_Err</a>(<span class="stringliteral">"open /dev/urandom"</span>);</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> }</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> </div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> NonblockingRng::~NonblockingRng()</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> {</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="preprocessor">#ifndef CRYPTOPP_WIN32_AVAILABLE</span></div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  close(m_fd);</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span> }</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> </div><div class="line"><a name="l00145"></a><span class="lineno"><a class="line" href="class_nonblocking_rng.html#ac74f9b2acf05938b98eedc806c4c29d3"> 145</a></span> <span class="keywordtype">void</span> <a class="code" href="class_nonblocking_rng.html#ac74f9b2acf05938b98eedc806c4c29d3">NonblockingRng::GenerateBlock</a>(<span class="keywordtype">byte</span> *output, <span class="keywordtype">size_t</span> size)</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span> {</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="preprocessor">#ifdef CRYPTOPP_WIN32_AVAILABLE</span></div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="comment">// Acquiring a provider is expensive. Do it once and retain the reference.</span></div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keyword">const</span> <a class="code" href="class_microsoft_crypto_provider.html">MicrosoftCryptoProvider</a> &hProvider = <a class="code" href="class_singleton.html">Singleton<MicrosoftCryptoProvider></a>().<a class="code" href="class_singleton.html#a2dfafdfafaaf20ca4cfc550125f6332d">Ref</a>();</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="preprocessor"># if defined(USE_MS_CRYPTOAPI)</span></div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">if</span> (!CryptGenRandom(hProvider.<a class="code" href="class_microsoft_crypto_provider.html#af2028181c1406ee7446a603e66dd06ab">GetProviderHandle</a>(), (DWORD)size, output))</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keywordflow">throw</span> <a class="code" href="class_o_s___r_n_g___err.html">OS_RNG_Err</a>(<span class="stringliteral">"CryptGenRandom"</span>);</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="preprocessor"># elif defined(USE_MS_CNGAPI)</span></div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  NTSTATUS ret = BCryptGenRandom(hProvider.<a class="code" href="class_microsoft_crypto_provider.html#af2028181c1406ee7446a603e66dd06ab">GetProviderHandle</a>(), output, (ULONG)size, 0);</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordflow">if</span> (!(BCRYPT_SUCCESS(ret)))</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>  <span class="comment">// Hack... OS_RNG_Err calls GetLastError()</span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  SetLastError(NtStatusToErrorCode(ret));</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keywordflow">throw</span> <a class="code" href="class_o_s___r_n_g___err.html">OS_RNG_Err</a>(<span class="stringliteral">"BCryptGenRandom"</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="preprocessor"># endif</span></div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordflow">while</span> (size)</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  {</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  ssize_t len = read(m_fd, output, size);</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">if</span> (len < 0)</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  {</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="comment">// /dev/urandom reads CAN give EAGAIN errors! (maybe EINTR as well)</span></div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keywordflow">if</span> (errno != EINTR && errno != EAGAIN)</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">throw</span> <a class="code" href="class_o_s___r_n_g___err.html">OS_RNG_Err</a>(<span class="stringliteral">"read /dev/urandom"</span>);</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span> </div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</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"> 175</span>  output += len;</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  size -= len;</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  }</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="preprocessor">#endif // CRYPTOPP_WIN32_AVAILABLE</span></div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span> }</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span> </div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="preprocessor">#endif // NONBLOCKING_RNG_AVAILABLE</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="comment">// *************************************************************</span></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> <span class="preprocessor">#ifdef BLOCKING_RNG_AVAILABLE</span></div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span> </div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="preprocessor">#ifndef CRYPTOPP_BLOCKING_RNG_FILENAME</span></div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="preprocessor">#ifdef __OpenBSD__</span></div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="preprocessor">#define CRYPTOPP_BLOCKING_RNG_FILENAME "/dev/srandom"</span></div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="preprocessor">#define CRYPTOPP_BLOCKING_RNG_FILENAME "/dev/random"</span></div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span> </div><div class="line"><a name="l00195"></a><span class="lineno"><a class="line" href="class_blocking_rng.html#adf9e446f27cb7adea7b59d4f1b340548"> 195</a></span> <a class="code" href="class_blocking_rng.html#adf9e446f27cb7adea7b59d4f1b340548">BlockingRng::BlockingRng</a>()</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span> {</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  m_fd = open(CRYPTOPP_BLOCKING_RNG_FILENAME,O_RDONLY);</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordflow">if</span> (m_fd == -1)</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keywordflow">throw</span> <a class="code" href="class_o_s___r_n_g___err.html">OS_RNG_Err</a>(<span class="stringliteral">"open "</span> CRYPTOPP_BLOCKING_RNG_FILENAME);</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> }</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> </div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span> BlockingRng::~BlockingRng()</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> {</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  close(m_fd);</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> </div><div class="line"><a name="l00207"></a><span class="lineno"><a class="line" href="class_blocking_rng.html#a1a24b9997e9cc4fac00b093afa367d50"> 207</a></span> <span class="keywordtype">void</span> <a class="code" href="class_blocking_rng.html#a1a24b9997e9cc4fac00b093afa367d50">BlockingRng::GenerateBlock</a>(<span class="keywordtype">byte</span> *output, <span class="keywordtype">size_t</span> size)</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span> {</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordflow">while</span> (size)</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  {</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="comment">// on some systems /dev/random will block until all bytes</span></div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="comment">// are available, on others it returns immediately</span></div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  ssize_t len = read(m_fd, output, size);</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keywordflow">if</span> (len < 0)</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>  <span class="comment">// /dev/random reads CAN give EAGAIN errors! (maybe EINTR as well)</span></div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordflow">if</span> (errno != EINTR && errno != EAGAIN)</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordflow">throw</span> <a class="code" href="class_o_s___r_n_g___err.html">OS_RNG_Err</a>(<span class="stringliteral">"read "</span> CRYPTOPP_BLOCKING_RNG_FILENAME);</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span> </div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordflow">continue</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>  size -= len;</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  output += len;</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keywordflow">if</span> (size)</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  sleep(1);</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  }</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> </div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="preprocessor">#endif // BLOCKING_RNG_AVAILABLE</span></div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span> </div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment">// *************************************************************</span></div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span> </div><div class="line"><a name="l00234"></a><span class="lineno"><a class="line" href="osrng_8h.html#a8469ca3f35c72e1b80f61432f7739b91"> 234</a></span> <span class="keywordtype">void</span> <a class="code" href="osrng_8h.html#a8469ca3f35c72e1b80f61432f7739b91">OS_GenerateRandomBlock</a>(<span class="keywordtype">bool</span> blocking, <span class="keywordtype">byte</span> *output, <span class="keywordtype">size_t</span> size)</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> {</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="preprocessor">#ifdef NONBLOCKING_RNG_AVAILABLE</span></div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keywordflow">if</span> (blocking)</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span> <span class="preprocessor">#endif</span></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> <span class="preprocessor">#ifdef BLOCKING_RNG_AVAILABLE</span></div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <a class="code" href="class_blocking_rng.html">BlockingRng</a> rng;</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  rng.<a class="code" href="class_blocking_rng.html#a1a24b9997e9cc4fac00b093afa367d50">GenerateBlock</a>(output, size);</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  }</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span> </div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <span class="preprocessor">#ifdef BLOCKING_RNG_AVAILABLE</span></div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordflow">if</span> (!blocking)</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  {</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="preprocessor">#ifdef NONBLOCKING_RNG_AVAILABLE</span></div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <a class="code" href="class_nonblocking_rng.html">NonblockingRng</a> rng;</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  rng.<a class="code" href="class_nonblocking_rng.html#ac74f9b2acf05938b98eedc806c4c29d3">GenerateBlock</a>(output, size);</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  }</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</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"><a class="line" href="class_auto_seeded_random_pool.html#a14efa7036cde0f494b48668ebf305ba5"> 257</a></span> <span class="keywordtype">void</span> <a class="code" href="class_auto_seeded_random_pool.html#a14efa7036cde0f494b48668ebf305ba5">AutoSeededRandomPool::Reseed</a>(<span class="keywordtype">bool</span> blocking, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> seedSize)</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span> {</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <a class="code" href="class_sec_byte_block.html">SecByteBlock</a> seed(seedSize);</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <a class="code" href="osrng_8h.html#a8469ca3f35c72e1b80f61432f7739b91">OS_GenerateRandomBlock</a>(blocking, seed, seedSize);</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <a class="code" href="class_random_pool.html#a4339d77cb309a5ee47d7a5f1751481f3">IncorporateEntropy</a>(seed, seedSize);</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> NAMESPACE_END</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span> </div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="preprocessor">#endif // OS_RNG_AVAILABLE</span></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="preprocessor">#endif // CRYPTOPP_IMPORTS</span></div><div class="ttc" id="class_random_pool_html_a4339d77cb309a5ee47d7a5f1751481f3"><div class="ttname"><a href="class_random_pool.html#a4339d77cb309a5ee47d7a5f1751481f3">RandomPool::IncorporateEntropy</a></div><div class="ttdeci">void IncorporateEntropy(const byte *input, size_t length)</div><div class="ttdoc">Update RNG state with additional unpredictable values.</div><div class="ttdef"><b>Definition:</b> <a href="randpool_8cpp_source.html#l00032">randpool.cpp:32</a></div></div>
<div class="ttc" id="class_exception_html"><div class="ttname"><a href="class_exception.html">Exception</a></div><div class="ttdoc">Base class for all exceptions thrown by the library.</div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l00155">cryptlib.h:155</a></div></div>
<div class="ttc" id="class_microsoft_crypto_provider_html"><div class="ttname"><a href="class_microsoft_crypto_provider.html">MicrosoftCryptoProvider</a></div><div class="ttdef"><b>Definition:</b> <a href="osrng_8h_source.html#l00037">osrng.h:37</a></div></div>
<div class="ttc" id="class_blocking_rng_html_adf9e446f27cb7adea7b59d4f1b340548"><div class="ttname"><a href="class_blocking_rng.html#adf9e446f27cb7adea7b59d4f1b340548">BlockingRng::BlockingRng</a></div><div class="ttdeci">BlockingRng()</div><div class="ttdoc">Construct a BlockingRng.</div><div class="ttdef"><b>Definition:</b> <a href="osrng_8cpp_source.html#l00195">osrng.cpp:195</a></div></div>
<div class="ttc" id="class_o_s___r_n_g___err_html_aac1ad9f91292d8ab1a3816f637941cc7"><div class="ttname"><a href="class_o_s___r_n_g___err.html#aac1ad9f91292d8ab1a3816f637941cc7">OS_RNG_Err::OS_RNG_Err</a></div><div class="ttdeci">OS_RNG_Err(const std::string &operation)</div><div class="ttdoc">Constructs an OS_RNG_Err.</div><div class="ttdef"><b>Definition:</b> <a href="osrng_8cpp_source.html#l00056">osrng.cpp:56</a></div></div>
<div class="ttc" id="class_singleton_html"><div class="ttname"><a href="class_singleton.html">Singleton</a></div><div class="ttdoc">Restricts the instantiation of a class to one static object without locks.</div><div class="ttdef"><b>Definition:</b> <a href="misc_8h_source.html#l00291">misc.h:291</a></div></div>
<div class="ttc" id="class_nonblocking_rng_html"><div class="ttname"><a href="class_nonblocking_rng.html">NonblockingRng</a></div><div class="ttdoc">Wrapper class for /dev/random and /dev/srandom.</div><div class="ttdef"><b>Definition:</b> <a href="osrng_8h_source.html#l00084">osrng.h:84</a></div></div>
<div class="ttc" id="class_auto_seeded_random_pool_html_a14efa7036cde0f494b48668ebf305ba5"><div class="ttname"><a href="class_auto_seeded_random_pool.html#a14efa7036cde0f494b48668ebf305ba5">AutoSeededRandomPool::Reseed</a></div><div class="ttdeci">void Reseed(bool blocking=false, unsigned int seedSize=32)</div><div class="ttdoc">Reseed an AutoSeededRandomPool.</div><div class="ttdef"><b>Definition:</b> <a href="osrng_8cpp_source.html#l00257">osrng.cpp:257</a></div></div>
<div class="ttc" id="config_8h_html"><div class="ttname"><a href="config_8h.html">config.h</a></div><div class="ttdoc">Library configuration file.</div></div>
<div class="ttc" id="class_sec_byte_block_html"><div class="ttname"><a href="class_sec_byte_block.html">SecByteBlock</a></div><div class="ttdoc">SecBlock<byte> typedef.</div><div class="ttdef"><b>Definition:</b> <a href="secblock_8h_source.html#l00822">secblock.h:822</a></div></div>
<div class="ttc" id="class_nonblocking_rng_html_ac74f9b2acf05938b98eedc806c4c29d3"><div class="ttname"><a href="class_nonblocking_rng.html#ac74f9b2acf05938b98eedc806c4c29d3">NonblockingRng::GenerateBlock</a></div><div class="ttdeci">void GenerateBlock(byte *output, size_t size)</div><div class="ttdoc">Generate random array of bytes.</div><div class="ttdef"><b>Definition:</b> <a href="osrng_8cpp_source.html#l00145">osrng.cpp:145</a></div></div>
<div class="ttc" id="class_blocking_rng_html_a1a24b9997e9cc4fac00b093afa367d50"><div class="ttname"><a href="class_blocking_rng.html#a1a24b9997e9cc4fac00b093afa367d50">BlockingRng::GenerateBlock</a></div><div class="ttdeci">void GenerateBlock(byte *output, size_t size)</div><div class="ttdoc">Generate random array of bytes.</div><div class="ttdef"><b>Definition:</b> <a href="osrng_8cpp_source.html#l00207">osrng.cpp:207</a></div></div>
<div class="ttc" id="class_nonblocking_rng_html_a09b27b1803636bdd60a64f7f587433ed"><div class="ttname"><a href="class_nonblocking_rng.html#a09b27b1803636bdd60a64f7f587433ed">NonblockingRng::NonblockingRng</a></div><div class="ttdeci">NonblockingRng()</div><div class="ttdoc">Construct a NonblockingRng.</div><div class="ttdef"><b>Definition:</b> <a href="osrng_8cpp_source.html#l00129">osrng.cpp:129</a></div></div>
<div class="ttc" id="class_o_s___r_n_g___err_html"><div class="ttname"><a href="class_o_s___r_n_g___err.html">OS_RNG_Err</a></div><div class="ttdoc">Exception thrown when an operating system error is encountered.</div><div class="ttdef"><b>Definition:</b> <a href="osrng_8h_source.html#l00024">osrng.h:24</a></div></div>
<div class="ttc" id="pch_8h_html"><div class="ttname"><a href="pch_8h.html">pch.h</a></div><div class="ttdoc">Precompiled header file.</div></div>
<div class="ttc" id="rng_8h_html"><div class="ttname"><a href="rng_8h.html">rng.h</a></div><div class="ttdoc">Miscellaneous classes for RNGs.</div></div>
<div class="ttc" id="class_microsoft_crypto_provider_html_a7da7375ab68892b8237bd682e13c5ab4"><div class="ttname"><a href="class_microsoft_crypto_provider.html#a7da7375ab68892b8237bd682e13c5ab4">MicrosoftCryptoProvider::MicrosoftCryptoProvider</a></div><div class="ttdeci">MicrosoftCryptoProvider()</div><div class="ttdoc">Construct a MicrosoftCryptoProvider.</div><div class="ttdef"><b>Definition:</b> <a href="osrng_8cpp_source.html#l00090">osrng.cpp:90</a></div></div>
<div class="ttc" id="class_blocking_rng_html"><div class="ttname"><a href="class_blocking_rng.html">BlockingRng</a></div><div class="ttdoc">Wrapper class for /dev/random and /dev/srandom.</div><div class="ttdef"><b>Definition:</b> <a href="osrng_8h_source.html#l00118">osrng.h:118</a></div></div>
<div class="ttc" id="osrng_8h_html_a8469ca3f35c72e1b80f61432f7739b91"><div class="ttname"><a href="osrng_8h.html#a8469ca3f35c72e1b80f61432f7739b91">OS_GenerateRandomBlock</a></div><div class="ttdeci">void OS_GenerateRandomBlock(bool blocking, byte *output, size_t size)</div><div class="ttdoc">OS_GenerateRandomBlock.</div><div class="ttdef"><b>Definition:</b> <a href="osrng_8cpp_source.html#l00234">osrng.cpp:234</a></div></div>
<div class="ttc" id="misc_8h_html_a6cd7decd035cc4e144cd3d395e834106"><div class="ttname"><a href="misc_8h.html#a6cd7decd035cc4e144cd3d395e834106">IntToString</a></div><div class="ttdeci">std::string IntToString(T value, unsigned int base=10)</div><div class="ttdoc">Converts a value to a string.</div><div class="ttdef"><b>Definition:</b> <a href="misc_8h_source.html#l00576">misc.h:576</a></div></div>
<div class="ttc" id="namespace_crypto_p_p_html"><div class="ttname"><a href="namespace_crypto_p_p.html">CryptoPP</a></div><div class="ttdoc">Crypto++ library namespace.</div></div>
<div class="ttc" id="class_microsoft_crypto_provider_html_af2028181c1406ee7446a603e66dd06ab"><div class="ttname"><a href="class_microsoft_crypto_provider.html#af2028181c1406ee7446a603e66dd06ab">MicrosoftCryptoProvider::GetProviderHandle</a></div><div class="ttdeci">ProviderHandle GetProviderHandle() const</div><div class="ttdoc">Retrieves the provider handle.</div><div class="ttdef"><b>Definition:</b> <a href="osrng_8h_source.html#l00065">osrng.h:65</a></div></div>
<div class="ttc" id="class_singleton_html_a2dfafdfafaaf20ca4cfc550125f6332d"><div class="ttname"><a href="class_singleton.html#a2dfafdfafaaf20ca4cfc550125f6332d">Singleton::Ref</a></div><div class="ttdeci">const T & Ref(...) const</div><div class="ttdoc">Return a reference to the inner Singleton object.</div><div class="ttdef"><b>Definition:</b> <a href="misc_8h_source.html#l00312">misc.h:312</a></div></div>
<div class="ttc" id="osrng_8h_html"><div class="ttname"><a href="osrng_8h.html">osrng.h</a></div><div class="ttdoc">Classes for access to the operating system's random number generators.</div></div>
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