📄 gost_8cpp-source.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>Crypto++: gost.cpp Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.3.2 --><div class="qindex"><a class="qindex" href="index.html">Main Page</a> | <a class="qindex" href="namespaces.html">Namespace List</a> | <a class="qindex" href="hierarchy.html">Class Hierarchy</a> | <a class="qindex" href="classes.html">Alphabetical List</a> | <a class="qindex" href="annotated.html">Compound List</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="namespacemembers.html">Namespace Members</a> | <a class="qindex" href="functions.html">Compound Members</a> | <a class="qindex" href="globals.html">File Members</a></div><h1>gost.cpp</h1><div class="fragment"><pre>00001 <span class="preprocessor">#include "pch.h"</span>00002 <span class="preprocessor">#include "<a class="code" href="gost_8h.html">gost.h</a>"</span>00003 <span class="preprocessor">#include "misc.h"</span>00004 00005 NAMESPACE_BEGIN(CryptoPP)00006 00007 <span class="comment">// these are the S-boxes given in Applied Cryptography 2nd Ed., p. 333</span>00008 <span class="keyword">const</span> byte GOST::Base::sBox[8][16]={00009 {4, 10, 9, 2, 13, 8, 0, 14, 6, 11, 1, 12, 7, 15, 5, 3},00010 {14, 11, 4, 12, 6, 13, 15, 10, 2, 3, 8, 1, 0, 7, 5, 9},00011 {5, 8, 1, 13, 10, 3, 4, 2, 14, 15, 12, 7, 6, 0, 9, 11},00012 {7, 13, 10, 1, 0, 8, 9, 15, 14, 4, 6, 12, 11, 2, 5, 3},00013 {6, 12, 7, 1, 5, 15, 13, 8, 4, 10, 9, 14, 0, 3, 11, 2},00014 {4, 11, 10, 0, 7, 2, 1, 13, 3, 6, 8, 5, 9, 12, 15, 14},00015 {13, 11, 4, 1, 3, 15, 5, 9, 0, 10, 14, 7, 6, 8, 2, 12},00016 {1, 15, 13, 0, 5, 7, 10, 4, 9, 2, 3, 14, 6, 11, 8, 12}};00017 00018 <span class="comment">/* // these are the S-boxes given in the GOST source code listing in Applied</span>00019 <span class="comment"> // Cryptography 2nd Ed., p. 644. they appear to be from the DES S-boxes</span>00020 <span class="comment"> {13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7 },</span>00021 <span class="comment"> { 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1 },</span>00022 <span class="comment"> {12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11 },</span>00023 <span class="comment"> { 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9 },</span>00024 <span class="comment"> { 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15 },</span>00025 <span class="comment"> {10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8 },</span>00026 <span class="comment"> {15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10 },</span>00027 <span class="comment"> {14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7 }}; </span>00028 <span class="comment">*/</span>00029 00030 <span class="keywordtype">bool</span> GOST::Base::sTableCalculated = <span class="keyword">false</span>;00031 word32 GOST::Base::sTable[4][256];00032 00033 <span class="keywordtype">void</span> GOST::Base::UncheckedSetKey(CipherDir direction, <span class="keyword">const</span> byte *userKey, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length)00034 {00035 AssertValidKeyLength(length);00036 00037 PrecalculateSTable();00038 00039 GetUserKey(LITTLE_ENDIAN_ORDER, key.begin(), 8, userKey, KEYLENGTH);00040 }00041 00042 <span class="keywordtype">void</span> GOST::Base::PrecalculateSTable()00043 {00044 <span class="keywordflow">if</span> (!sTableCalculated)00045 {00046 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> i = 0; i < 4; i++)00047 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> j = 0; j < 256; j++) 00048 {00049 word32 temp = sBox[2*i][j%16] | (sBox[2*i+1][j/16] << 4);00050 sTable[i][j] = rotlMod(temp, 11+8*i);00051 }00052 00053 sTableCalculated=<span class="keyword">true</span>;00054 }00055 }00056 00057 <span class="preprocessor">#define f(x) ( t=x, \</span>00058 <span class="preprocessor"> sTable[3][GETBYTE(t, 3)] ^ sTable[2][GETBYTE(t, 2)] \</span>00059 <span class="preprocessor"> ^ sTable[1][GETBYTE(t, 1)] ^ sTable[0][GETBYTE(t, 0)] )</span>00060 <span class="preprocessor"></span>00061 <span class="keyword">typedef</span> BlockGetAndPut<word32, LittleEndian> Block;00062 00063 <span class="keywordtype">void</span> GOST::Enc::ProcessAndXorBlock(<span class="keyword">const</span> byte *inBlock, <span class="keyword">const</span> byte *xorBlock, byte *outBlock)<span class="keyword"> const</span>00064 <span class="keyword"></span>{00065 word32 n1, n2, t;00066 00067 Block::Get(inBlock)(n1)(n2);00068 00069 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i<3; i++)00070 {00071 n2 ^= f(n1+key[0]);00072 n1 ^= f(n2+key[1]);00073 n2 ^= f(n1+key[2]);00074 n1 ^= f(n2+key[3]);00075 n2 ^= f(n1+key[4]);00076 n1 ^= f(n2+key[5]);00077 n2 ^= f(n1+key[6]);00078 n1 ^= f(n2+key[7]);00079 }00080 00081 n2 ^= f(n1+key[7]);00082 n1 ^= f(n2+key[6]);00083 n2 ^= f(n1+key[5]);00084 n1 ^= f(n2+key[4]);00085 n2 ^= f(n1+key[3]);00086 n1 ^= f(n2+key[2]);00087 n2 ^= f(n1+key[1]);00088 n1 ^= f(n2+key[0]);00089 00090 Block::Put(xorBlock, outBlock)(n2)(n1);00091 }00092 00093 <span class="keywordtype">void</span> GOST::Dec::ProcessAndXorBlock(<span class="keyword">const</span> byte *inBlock, <span class="keyword">const</span> byte *xorBlock, byte *outBlock)<span class="keyword"> const</span>00094 <span class="keyword"></span>{00095 word32 n1, n2, t;00096 00097 Block::Get(inBlock)(n1)(n2);00098 00099 n2 ^= f(n1+key[0]);00100 n1 ^= f(n2+key[1]);00101 n2 ^= f(n1+key[2]);00102 n1 ^= f(n2+key[3]);00103 n2 ^= f(n1+key[4]);00104 n1 ^= f(n2+key[5]);00105 n2 ^= f(n1+key[6]);00106 n1 ^= f(n2+key[7]);00107 00108 <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i<3; i++)00109 {00110 n2 ^= f(n1+key[7]);00111 n1 ^= f(n2+key[6]);00112 n2 ^= f(n1+key[5]);00113 n1 ^= f(n2+key[4]);00114 n2 ^= f(n1+key[3]);00115 n1 ^= f(n2+key[2]);00116 n2 ^= f(n1+key[1]);00117 n1 ^= f(n2+key[0]);00118 }00119 00120 Block::Put(xorBlock, outBlock)(n2)(n1);00121 }00122 00123 NAMESPACE_END</pre></div><hr size="1"><address style="align: right;"><small>Generated on Tue Jul 8 23:34:16 2003 for Crypto++ by<a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border=0 > </a>1.3.2 </small></address></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -