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<h1>panama.cpp</h1><pre class="fragment"><div>00001 <span class="comment">// panama.cpp - written and placed in the public domain by Wei Dai</span>
00002
00003 <span class="preprocessor">#include "pch.h"</span>
00004 <span class="preprocessor">#include "panama.h"</span>
00005 <span class="preprocessor">#include "misc.h"</span>
00006
00007 NAMESPACE_BEGIN(CryptoPP)
00008
00009 template <class B>
00010 <span class="keywordtype">void</span> <a class="code" href="class_panama.html">Panama</a><B>::Reset()
00011 {
00012 m_bstart = 0;
00013 memset(m_state, 0, m_state.size()*4);
00014 }
00015
00016 <span class="keyword">template</span> <<span class="keyword">class</span> B>
00017 <span class="keywordtype">void</span> <a class="code" href="class_panama.html">Panama<B>::Iterate</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> count, <span class="keyword">const</span> word32 *p, word32 *z, <span class="keyword">const</span> word32 *y)
00018 {
00019 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> bstart = m_bstart;
00020 word32 *<span class="keyword">const</span> a = m_state;
00021 <span class="preprocessor">#define c (a+17)</span>
00022 <span class="preprocessor"></span><span class="preprocessor">#define b ((Stage *)(a+34))</span>
00023 <span class="preprocessor"></span>
00024 <span class="comment">// output</span>
00025 <span class="preprocessor">#define OA(i) z[i] = ConditionalByteReverse(B::ToEnum(), a[i+9])</span>
00026 <span class="preprocessor"></span><span class="preprocessor">#define OX(i) z[i] = y[i] ^ ConditionalByteReverse(B::ToEnum(), a[i+9])</span>
00027 <span class="preprocessor"></span><span class="comment">// buffer update</span>
00028 <span class="preprocessor">#define US(i) {word32 t=b0[i]; b0[i]=ConditionalByteReverse(B::ToEnum(), p[i])^t; b25[(i+6)%8]^=t;}</span>
00029 <span class="preprocessor"></span><span class="preprocessor">#define UL(i) {word32 t=b0[i]; b0[i]=a[i+1]^t; b25[(i+6)%8]^=t;}</span>
00030 <span class="preprocessor"></span><span class="comment">// gamma and pi</span>
00031 <span class="preprocessor">#define GP(i) c[5*i%17] = rotlFixed(a[i] ^ (a[(i+1)%17] | ~a[(i+2)%17]), ((5*i%17)*((5*i%17)+1)/2)%32)</span>
00032 <span class="preprocessor"></span><span class="comment">// theta and sigma</span>
00033 <span class="preprocessor">#define T(i,x) a[i] = c[i] ^ c[(i+1)%17] ^ c[(i+4)%17] ^ x</span>
00034 <span class="preprocessor"></span><span class="preprocessor">#define TS1S(i) T(i+1, ConditionalByteReverse(B::ToEnum(), p[i]))</span>
00035 <span class="preprocessor"></span><span class="preprocessor">#define TS1L(i) T(i+1, b4[i])</span>
00036 <span class="preprocessor"></span><span class="preprocessor">#define TS2(i) T(i+9, b16[i])</span>
00037 <span class="preprocessor"></span>
00038 <span class="keywordflow">while</span> (count--)
00039 {
00040 <span class="keywordflow">if</span> (z)
00041 {
00042 <span class="keywordflow">if</span> (y)
00043 {
00044 OX(0); OX(1); OX(2); OX(3); OX(4); OX(5); OX(6); OX(7);
00045 y += 8;
00046 }
00047 <span class="keywordflow">else</span>
00048 {
00049 OA(0); OA(1); OA(2); OA(3); OA(4); OA(5); OA(6); OA(7);
00050 }
00051 z += 8;
00052 }
00053
00054 word32 *<span class="keyword">const</span> b16 = b[(bstart+16) % STAGES];
00055 word32 *<span class="keyword">const</span> b4 = b[(bstart+4) % STAGES];
00056 bstart = (bstart + STAGES - 1) % STAGES;
00057 word32 *<span class="keyword">const</span> b0 = b[bstart];
00058 word32 *<span class="keyword">const</span> b25 = b[(bstart+25) % STAGES];
00059
00060
00061 <span class="keywordflow">if</span> (p)
00062 {
00063 US(0); US(1); US(2); US(3); US(4); US(5); US(6); US(7);
00064 }
00065 <span class="keywordflow">else</span>
00066 {
00067 UL(0); UL(1); UL(2); UL(3); UL(4); UL(5); UL(6); UL(7);
00068 }
00069
00070 GP(0); GP(1); GP(2); GP(3); GP(4); GP(5); GP(6); GP(7);
00071 GP(8); GP(9); GP(10); GP(11); GP(12); GP(13); GP(14); GP(15); GP(16);
00072
00073 T(0,1);
00074
00075 <span class="keywordflow">if</span> (p)
00076 {
00077 TS1S(0); TS1S(1); TS1S(2); TS1S(3); TS1S(4); TS1S(5); TS1S(6); TS1S(7);
00078 p += 8;
00079 }
00080 <span class="keywordflow">else</span>
00081 {
00082 TS1L(0); TS1L(1); TS1L(2); TS1L(3); TS1L(4); TS1L(5); TS1L(6); TS1L(7);
00083 }
00084
00085 TS2(0); TS2(1); TS2(2); TS2(3); TS2(4); TS2(5); TS2(6); TS2(7);
00086 }
00087 m_bstart = bstart;
00088 }
00089
00090 <span class="keyword">template</span> <<span class="keyword">class</span> B>
00091 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_panama_hash.html">PanamaHash<B>::HashMultipleBlocks</a>(<span class="keyword">const</span> word32 *input, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length)
00092 {
00093 this->Iterate(length / this->BLOCKSIZE, input);
00094 <span class="keywordflow">return</span> length % this->BLOCKSIZE;
00095 }
00096
00097 <span class="keyword">template</span> <<span class="keyword">class</span> B>
<a name="l00098"></a><a class="code" href="class_panama_hash.html#_panama_hasha2">00098</a> <span class="keywordtype">void</span> <a class="code" href="class_panama_hash.html">PanamaHash<B>::TruncatedFinal</a>(byte *hash, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> size)
00099 {
00100 this->ThrowIfInvalidTruncatedSize(size);
00101
00102 PadLastBlock(this->BLOCKSIZE, 0x01);
00103
00104 HashEndianCorrectedBlock(this->m_data);
00105
00106 this->Iterate(32); <span class="comment">// pull</span>
00107
00108 ConditionalByteReverse(B::ToEnum(), this->m_state+9, this->m_state+9, DIGESTSIZE);
00109 memcpy(hash, this->m_state+9, size);
00110
00111 this-><a class="code" href="class_hash_transformation.html#_two_bases_3_01_message_authentication_code_00_01_variable_key_length_3_0132_00_010_00_01_u_i_n_t___m_a_x_01_4_01_4a3">Restart</a>(); <span class="comment">// reinit for next use</span>
00112 }
00113
00114 <span class="keyword">template</span> <<span class="keyword">class</span> B>
00115 <span class="keywordtype">void</span> <a class="code" href="class_panama_cipher_policy.html">PanamaCipherPolicy<B>::CipherSetKey</a>(<span class="keyword">const</span> <a class="code" href="class_name_value_pairs.html">NameValuePairs</a> &params, <span class="keyword">const</span> byte *key, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length)
00116 {
00117 FixedSizeSecBlock<word32, 8> buf;
00118
00119 this->Reset();
00120 memcpy(buf, key, 32);
00121 this->Iterate(1, buf);
00122 <span class="keywordflow">if</span> (length == 64)
00123 memcpy(buf, key+32, 32);
00124 <span class="keywordflow">else</span>
00125 memset(buf, 0, 32);
00126 this->Iterate(1, buf);
00127
00128 this->Iterate(32);
00129 }
00130
00131 <span class="keyword">template</span> <<span class="keyword">class</span> B>
00132 <span class="keywordtype">void</span> <a class="code" href="class_panama_cipher_policy.html">PanamaCipherPolicy<B>::OperateKeystream</a>(KeystreamOperation operation, byte *output, <span class="keyword">const</span> byte *input, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> iterationCount)
00133 {
00134 this->Iterate(iterationCount, NULL, (word32 *)output, (<span class="keyword">const</span> word32 *)input);
00135 }
00136
00137 <span class="keyword">template</span> <span class="keyword">class </span><a class="code" href="class_panama.html">Panama<BigEndian></a>;
00138 <span class="keyword">template</span> <span class="keyword">class </span><a class="code" href="class_panama.html">Panama<LittleEndian></a>;
00139
00140 <span class="keyword">template</span> <span class="keyword">class </span><a class="code" href="class_panama_hash.html">PanamaHash<BigEndian></a>;
00141 <span class="keyword">template</span> <span class="keyword">class </span><a class="code" href="class_panama_hash.html">PanamaHash<LittleEndian></a>;
00142
00143 <span class="keyword">template</span> <span class="keyword">class </span><a class="code" href="class_panama_cipher_policy.html">PanamaCipherPolicy<BigEndian></a>;
00144 <span class="keyword">template</span> <span class="keyword">class </span><a class="code" href="class_panama_cipher_policy.html">PanamaCipherPolicy<LittleEndian></a>;
00145
00146 NAMESPACE_END
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