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<div id="projectname">Crypto++
 <span id="projectnumber">7.0</span>
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<div id="projectbrief">Free C++ class library of cryptographic schemes</div>
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<div class="title">padlkrng.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">// via-rng.cpp - written and placed in public domain by Jeffrey Walton and Uri Blumenthal.</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="preprocessor">#include "<a class="code" href="pch_8h.html">pch.h</a>"</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="preprocessor">#include "<a class="code" href="config_8h.html">config.h</a>"</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include "<a class="code" href="cryptlib_8h.html">cryptlib.h</a>"</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#include "<a class="code" href="secblock_8h.html">secblock.h</a>"</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include "<a class="code" href="padlkrng_8h.html">padlkrng.h</a>"</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include "<a class="code" href="cpu_8h.html">cpu.h</a>"</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">// The Padlock Security Engine RNG has a few items to be aware of. You can</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// find copies of the Programmer's manual, Cryptography Research Inc audit</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// report, and other goodies at http://www.cryptopp.com/wiki/VIA_Padlock.</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> </div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#if CRYPTOPP_MSC_VERSION</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor"># pragma warning(disable: 4702)</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#endif</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> NAMESPACE_BEGIN(<a class="code" href="namespace_crypto_p_p.html">CryptoPP</a>)</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"><a class="line" href="class_padlock_r_n_g.html#a07fbc5f498e9de45e9c7f97b7d82d659"> 20</a></span> <a class="code" href="class_padlock_r_n_g.html">PadlockRNG</a>::<a class="code" href="class_padlock_r_n_g.html">PadlockRNG</a>(word32 divisor)</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> : m_divisor(DivisorHelper(divisor)), m_msr(0)</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> {</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#if defined(CRYPTOPP_X86_ASM_AVAILABLE)</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="keywordflow">if</span> (!<a class="code" href="cpu_8h.html#a05706e0c94ae8651b12f3f5de1289763">HasPadlockRNG</a>())</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <span class="keywordflow">throw</span> <a class="code" href="class_padlock_r_n_g___err.html">PadlockRNG_Err</a>(<span class="stringliteral">"PadlockRNG"</span>, <span class="stringliteral">"PadlockRNG generator not available"</span>);</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="keywordflow">throw</span> <a class="code" href="class_padlock_r_n_g___err.html">PadlockRNG_Err</a>(<span class="stringliteral">"PadlockRNG"</span>, <span class="stringliteral">"PadlockRNG generator not available"</span>);</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> }</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div><div class="line"><a name="l00031"></a><span class="lineno"><a class="line" href="class_padlock_r_n_g.html#a7c1ccb37d4d08893843d1ebae0481e0d"> 31</a></span> <span class="keywordtype">void</span> <a class="code" href="class_padlock_r_n_g.html#a7c1ccb37d4d08893843d1ebae0481e0d">PadlockRNG::GenerateBlock</a>(byte *output, <span class="keywordtype">size_t</span> size)</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> {</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  CRYPTOPP_UNUSED(output); CRYPTOPP_UNUSED(size);</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#if defined(CRYPTOPP_X86_ASM_AVAILABLE) && defined(__GNUC__)</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keywordflow">while</span> (size)</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>  __asm__ __volatile__</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  (</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> #<span class="keywordflow">if</span> (CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X64)</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="stringliteral">"mov %1, %%rdi ;\n"</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="stringliteral">"movl %2, %%edx ;\n"</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> #<span class="keywordflow">else</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="stringliteral">"mov %1, %%edi ;\n"</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="stringliteral">"movl %2, %%edx ;\n"</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> #endif</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="stringliteral">".byte 0x0f, 0xa7, 0xc0 ;\n"</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="stringliteral">"movl %%eax, %0 ;\n"</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  : <span class="stringliteral">"=g"</span> (m_msr) : <span class="stringliteral">"g"</span> (m_buffer.<a class="code" href="class_sec_block.html#a42ad7c28810297ca50b2411284876845">data</a>()), <span class="stringliteral">"g"</span> (m_divisor)</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#if (CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X64)</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  : <span class="stringliteral">"eax"</span>, <span class="stringliteral">"edx"</span>, <span class="stringliteral">"rdi"</span>, <span class="stringliteral">"cc"</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  : <span class="stringliteral">"eax"</span>, <span class="stringliteral">"edx"</span>, <span class="stringliteral">"edi"</span>, <span class="stringliteral">"cc"</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  );</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> ret = m_msr & 0x1f;</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> rem = STDMIN<size_t>(ret, STDMIN<size_t>(size, 16U <span class="comment">/*buffer size*/</span>));</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  std::memcpy(output, m_buffer, rem);</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  size -= rem; output += rem;</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> <span class="preprocessor">#elif defined(CRYPTOPP_X86_ASM_AVAILABLE) && defined(_MSC_VER) && defined(_M_IX86)</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">while</span> (size)</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>  word32 result, divisor = m_divisor;</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  byte *buffer = <span class="keyword">reinterpret_cast<</span>byte*<span class="keyword">></span>(m_buffer.<a class="code" href="class_sec_block.html#a42ad7c28810297ca50b2411284876845">data</a>());</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  __asm {</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  mov edi, buffer</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  mov edx, divisor</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  _emit 0x0f</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  _emit 0xa7</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  _emit 0xc0</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  mov result, eax</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> </div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> ret = (m_msr = result) & 0x1f;</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> rem = STDMIN<size_t>(ret, STDMIN<size_t>(size, 16U <span class="comment">/*buffer size*/</span>));</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  std::memcpy(output, buffer, rem);</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  size -= rem; output += rem;</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">#else</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">throw</span> <a class="code" href="class_padlock_r_n_g___err.html">PadlockRNG_Err</a>(<span class="stringliteral">"GenerateBlock"</span>, <span class="stringliteral">"PadlockRNG generator not available"</span>);</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="preprocessor">#endif // CRYPTOPP_X86_ASM_AVAILABLE</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> }</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div><div class="line"><a name="l00087"></a><span class="lineno"><a class="line" href="class_padlock_r_n_g.html#a5bf981efd3e19ec20c7a4f70bb2a0d97"> 87</a></span> <span class="keywordtype">void</span> <a class="code" href="class_padlock_r_n_g.html#a5bf981efd3e19ec20c7a4f70bb2a0d97">PadlockRNG::DiscardBytes</a>(<span class="keywordtype">size_t</span> n)</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> {</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <a class="code" href="class_fixed_size_sec_block.html">FixedSizeSecBlock<word32, 4></a> discard;</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  n = <a class="code" href="misc_8h.html#a57a219d44f45272a1f3b3f17a656000a">RoundUpToMultipleOf</a>(n, <span class="keyword">sizeof</span>(word32));</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="keywordtype">size_t</span> count = <a class="code" href="misc_8h.html#abe412b0409249cb54899e97bc7d86424">STDMIN</a>(n, discard.<a class="code" href="class_sec_block.html#a93e1256d8021ba4ab9007ea4e19ae8c2">SizeInBytes</a>());</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordflow">while</span> (count)</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="class_padlock_r_n_g.html#a7c1ccb37d4d08893843d1ebae0481e0d">GenerateBlock</a>(discard.<a class="code" href="class_sec_block.html#a5565f51350846fb7224720c403674216">BytePtr</a>(), count);</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  n -= count;</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  count = <a class="code" href="misc_8h.html#abe412b0409249cb54899e97bc7d86424">STDMIN</a>(n, discard.<a class="code" href="class_sec_block.html#a93e1256d8021ba4ab9007ea4e19ae8c2">SizeInBytes</a>());</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  }</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> }</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> NAMESPACE_END</div><div class="ttc" id="class_padlock_r_n_g_html_a5bf981efd3e19ec20c7a4f70bb2a0d97"><div class="ttname"><a href="class_padlock_r_n_g.html#a5bf981efd3e19ec20c7a4f70bb2a0d97">PadlockRNG::DiscardBytes</a></div><div class="ttdeci">virtual void DiscardBytes(size_t n)</div><div class="ttdoc">Generate and discard n bytes. </div><div class="ttdef"><b>Definition:</b> <a href="padlkrng_8cpp_source.html#l00087">padlkrng.cpp:87</a></div></div>
<div class="ttc" id="class_sec_block_html_a93e1256d8021ba4ab9007ea4e19ae8c2"><div class="ttname"><a href="class_sec_block.html#a93e1256d8021ba4ab9007ea4e19ae8c2">SecBlock::SizeInBytes</a></div><div class="ttdeci">size_type SizeInBytes() const</div><div class="ttdoc">Provides the number of bytes in the SecBlock. </div><div class="ttdef"><b>Definition:</b> <a href="secblock_8h_source.html#l00575">secblock.h:575</a></div></div>
<div class="ttc" id="padlkrng_8h_html"><div class="ttname"><a href="padlkrng_8h.html">padlkrng.h</a></div><div class="ttdoc">Classes for VIA Padlock RNG. </div></div>
<div class="ttc" id="cpu_8h_html_a05706e0c94ae8651b12f3f5de1289763"><div class="ttname"><a href="cpu_8h.html#a05706e0c94ae8651b12f3f5de1289763">HasPadlockRNG</a></div><div class="ttdeci">bool HasPadlockRNG()</div><div class="ttdoc">Determines Padlock RNG availability. </div><div class="ttdef"><b>Definition:</b> <a href="cpu_8h_source.html#l00239">cpu.h:239</a></div></div>
<div class="ttc" id="cryptlib_8h_html"><div class="ttname"><a href="cryptlib_8h.html">cryptlib.h</a></div><div class="ttdoc">Abstract base classes that provide a uniform interface to this library. </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_padlock_r_n_g_html"><div class="ttname"><a href="class_padlock_r_n_g.html">PadlockRNG</a></div><div class="ttdoc">Hardware generated random numbers using VIA XSTORE. </div><div class="ttdef"><b>Definition:</b> <a href="padlkrng_8h_source.html#l00050">padlkrng.h:50</a></div></div>
<div class="ttc" id="secblock_8h_html"><div class="ttname"><a href="secblock_8h.html">secblock.h</a></div><div class="ttdoc">Classes and functions for secure memory allocations. </div></div>
<div class="ttc" id="class_sec_block_html_a42ad7c28810297ca50b2411284876845"><div class="ttname"><a href="class_sec_block.html#a42ad7c28810297ca50b2411284876845">SecBlock::data</a></div><div class="ttdeci">A::pointer data()</div><div class="ttdoc">Provides a pointer to the first element in the memory block. </div><div class="ttdef"><b>Definition:</b> <a href="secblock_8h_source.html#l00553">secblock.h:553</a></div></div>
<div class="ttc" id="class_padlock_r_n_g___err_html"><div class="ttname"><a href="class_padlock_r_n_g___err.html">PadlockRNG_Err</a></div><div class="ttdoc">Exception thrown when a PadlockRNG generator encounters a generator related error. </div><div class="ttdef"><b>Definition:</b> <a href="padlkrng_8h_source.html#l00020">padlkrng.h:20</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="class_fixed_size_sec_block_html"><div class="ttname"><a href="class_fixed_size_sec_block.html">FixedSizeSecBlock< word32, 4 ></a></div></div>
<div class="ttc" id="misc_8h_html_abe412b0409249cb54899e97bc7d86424"><div class="ttname"><a href="misc_8h.html#abe412b0409249cb54899e97bc7d86424">STDMIN</a></div><div class="ttdeci">const T & STDMIN(const T &a, const T &b)</div><div class="ttdoc">Replacement function for std::min. </div><div class="ttdef"><b>Definition:</b> <a href="misc_8h_source.html#l00507">misc.h:507</a></div></div>
<div class="ttc" id="cpu_8h_html"><div class="ttname"><a href="cpu_8h.html">cpu.h</a></div><div class="ttdoc">Functions for CPU features and intrinsics. </div></div>
<div class="ttc" id="misc_8h_html_a57a219d44f45272a1f3b3f17a656000a"><div class="ttname"><a href="misc_8h.html#a57a219d44f45272a1f3b3f17a656000a">RoundUpToMultipleOf</a></div><div class="ttdeci">T1 RoundUpToMultipleOf(const T1 &n, const T2 &m)</div><div class="ttdoc">Rounds a value up to a multiple of a second value. </div><div class="ttdef"><b>Definition:</b> <a href="misc_8h_source.html#l00971">misc.h:971</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_padlock_r_n_g_html_a7c1ccb37d4d08893843d1ebae0481e0d"><div class="ttname"><a href="class_padlock_r_n_g.html#a7c1ccb37d4d08893843d1ebae0481e0d">PadlockRNG::GenerateBlock</a></div><div class="ttdeci">virtual 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="padlkrng_8cpp_source.html#l00031">padlkrng.cpp:31</a></div></div>
<div class="ttc" id="class_sec_block_html_a5565f51350846fb7224720c403674216"><div class="ttname"><a href="class_sec_block.html#a5565f51350846fb7224720c403674216">SecBlock::BytePtr</a></div><div class="ttdeci">byte * BytePtr()</div><div class="ttdoc">Provides a byte pointer to the first element in the memory block. </div><div class="ttdef"><b>Definition:</b> <a href="secblock_8h_source.html#l00568">secblock.h:568</a></div></div>
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>
7
>
armv7hl
>
media
>
core-release
>
by-pkgid
>
0a67b807a02637f2cae68649d519a89d
>
files
>
2483
