1 { Copyright (C) 2005 Bas Steendijk and Peter Green
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2 For conditions of distribution and use, see copyright notice in zlib_license.txt
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3 Which is included in the package
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4 ----------------------------------------------------------------------------- }
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9 pascal implementation of MD5
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11 written by Bas Steendijk
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13 based on RFC1321 - The MD5 Message-Digest Algorithm
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15 optimized for speed: saved on copying and sub calls in the core routine
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19 - Borland Turbo Pascal 7
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20 - Free Pascal 1.0.6 for i386 (on *nix)
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21 - various other versions of freepascal on windows and linux i386
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22 - various other versions of delphi
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23 - free pascal 1.9.5 on powerpc darwin
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25 this unit is endian portable but is likely to be significantly slower on big endian systems
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37 Tmd5=array[0..15] of byte;
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42 dvar=array[0..0] of byte;
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44 buf:array[0..63] of byte;
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45 H:array[0..3] of uint32;
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50 procedure md5processblock(var h:array of uint32;const data);
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52 procedure md5init(var state:tmd5state);
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53 procedure md5process(var state:tmd5state;const data;len:longint);
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54 procedure md5finish(var state:tmd5state;var result);
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56 procedure getmd5(const data;len:longint;var result);
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58 function md5tostr(const md5:tmd5):string;
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62 function inttohex(val,bits:integer):string;
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64 hexchar:array[0..15] of char='0123456789abcdef';
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66 inttohex := hexchar[val shr 4]+hexchar[val and $f];
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70 function rol(w,bits:uint32): uint32; assembler;
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72 {cpu386 is not defined on freepascal. but fpc assembler is incompatible, uses different code}
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73 {inline($89/$d1/$d3/$c0);}
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78 function rol(w,bits:uint32):uint32;
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80 rol := (w shl bits) or (w shr (32-bits));
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85 {function swapbytes(invalue:uint32):uint32;
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87 inbytes : array[0..3] of byte absolute invalue;
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88 outbytes : array[0..3] of byte absolute result;
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92 outbytes[0] := inbytes[3];
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93 outbytes[1] := inbytes[2];
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94 outbytes[2] := inbytes[1];
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95 outbytes[3] := inbytes[0];
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98 procedure md5processblock(var h:array of uint32;const data);
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100 S11=7; S12=12; S13=17; S14=22;
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101 S21=5; S22=9; S23=14; S24=20;
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102 S31=4; S32=11; S33=16; S34=23;
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103 S41=6; S42=10; S43=15; S44=21;
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107 w:array[0..63] of byte absolute data;
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108 x:array[0..15] of uint32 {$ifndef ENDIAN_BIG} absolute data{$endif} ;
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109 y:array[0..63] of byte absolute x;
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110 {$ifdef ENDIAN_BIG}counter : integer;{$endif}
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116 {$ifdef ENDIAN_BIG}
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117 for counter := 0 to 63 do begin
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118 y[counter] := w[counter xor 3];
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121 a := rol(a + ((b and c) or ((not b) and d)) + x[ 0] + $d76aa478, S11) + b;
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122 d := rol(d + ((a and b) or ((not a) and c)) + x[ 1] + $e8c7b756, S12) + a;
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123 c := rol(c + ((d and a) or ((not d) and b)) + x[ 2] + $242070db, S13) + d;
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124 b := rol(b + ((c and d) or ((not c) and a)) + x[ 3] + $c1bdceee, S14) + c;
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125 a := rol(a + ((b and c) or ((not b) and d)) + x[ 4] + $f57c0faf, S11) + b;
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126 d := rol(d + ((a and b) or ((not a) and c)) + x[ 5] + $4787c62a, S12) + a;
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127 c := rol(c + ((d and a) or ((not d) and b)) + x[ 6] + $a8304613, S13) + d;
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128 b := rol(b + ((c and d) or ((not c) and a)) + x[ 7] + $fd469501, S14) + c;
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129 a := rol(a + ((b and c) or ((not b) and d)) + x[ 8] + $698098d8, S11) + b;
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130 d := rol(d + ((a and b) or ((not a) and c)) + x[ 9] + $8b44f7af, S12) + a;
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131 c := rol(c + ((d and a) or ((not d) and b)) + x[10] + $ffff5bb1, S13) + d;
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132 b := rol(b + ((c and d) or ((not c) and a)) + x[11] + $895cd7be, S14) + c;
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133 a := rol(a + ((b and c) or ((not b) and d)) + x[12] + $6b901122, S11) + b;
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134 d := rol(d + ((a and b) or ((not a) and c)) + x[13] + $fd987193, S12) + a;
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135 c := rol(c + ((d and a) or ((not d) and b)) + x[14] + $a679438e, S13) + d;
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136 b := rol(b + ((c and d) or ((not c) and a)) + x[15] + $49b40821, S14) + c;
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138 a := rol(a + ((b and d) or (c and (not d))) + x[ 1] + $f61e2562, S21) + b;
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139 d := rol(d + ((a and c) or (b and (not c))) + x[ 6] + $c040b340, S22) + a;
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140 c := rol(c + ((d and b) or (a and (not b))) + x[11] + $265e5a51, S23) + d;
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141 b := rol(b + ((c and a) or (d and (not a))) + x[ 0] + $e9b6c7aa, S24) + c;
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142 a := rol(a + ((b and d) or (c and (not d))) + x[ 5] + $d62f105d, S21) + b;
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143 d := rol(d + ((a and c) or (b and (not c))) + x[10] + $02441453, S22) + a;
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144 c := rol(c + ((d and b) or (a and (not b))) + x[15] + $d8a1e681, S23) + d;
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145 b := rol(b + ((c and a) or (d and (not a))) + x[ 4] + $e7d3fbc8, S24) + c;
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146 a := rol(a + ((b and d) or (c and (not d))) + x[ 9] + $21e1cde6, S21) + b;
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147 d := rol(d + ((a and c) or (b and (not c))) + x[14] + $c33707d6, S22) + a;
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148 c := rol(c + ((d and b) or (a and (not b))) + x[ 3] + $f4d50d87, S23) + d;
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149 b := rol(b + ((c and a) or (d and (not a))) + x[ 8] + $455a14ed, S24) + c;
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150 a := rol(a + ((b and d) or (c and (not d))) + x[13] + $a9e3e905, S21) + b;
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151 d := rol(d + ((a and c) or (b and (not c))) + x[ 2] + $fcefa3f8, S22) + a;
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152 c := rol(c + ((d and b) or (a and (not b))) + x[ 7] + $676f02d9, S23) + d;
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153 b := rol(b + ((c and a) or (d and (not a))) + x[12] + $8d2a4c8a, S24) + c;
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155 a := rol(a + (b xor c xor d) + x[ 5] + $fffa3942, S31) + b;
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156 d := rol(d + (a xor b xor c) + x[ 8] + $8771f681, S32) + a;
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157 c := rol(c + (d xor a xor b) + x[11] + $6d9d6122, S33) + d;
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158 b := rol(b + (c xor d xor a) + x[14] + $fde5380c, S34) + c;
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159 a := rol(a + (b xor c xor d) + x[ 1] + $a4beea44, S31) + b;
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160 d := rol(d + (a xor b xor c) + x[ 4] + $4bdecfa9, S32) + a;
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161 c := rol(c + (d xor a xor b) + x[ 7] + $f6bb4b60, S33) + d;
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162 b := rol(b + (c xor d xor a) + x[10] + $bebfbc70, S34) + c;
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163 a := rol(a + (b xor c xor d) + x[13] + $289b7ec6, S31) + b;
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164 d := rol(d + (a xor b xor c) + x[ 0] + $eaa127fa, S32) + a;
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165 c := rol(c + (d xor a xor b) + x[ 3] + $d4ef3085, S33) + d;
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166 b := rol(b + (c xor d xor a) + x[ 6] + $04881d05, S34) + c;
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167 a := rol(a + (b xor c xor d) + x[ 9] + $d9d4d039, S31) + b;
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168 d := rol(d + (a xor b xor c) + x[12] + $e6db99e5, S32) + a;
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169 c := rol(c + (d xor a xor b) + x[15] + $1fa27cf8, S33) + d;
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170 b := rol(b + (c xor d xor a) + x[ 2] + $c4ac5665, S34) + c;
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172 a := rol(a + (c xor (b or (not d))) + x[ 0] + $f4292244, S41) + b;
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173 d := rol(d + (b xor (a or (not c))) + x[ 7] + $432aff97, S42) + a;
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174 c := rol(c + (a xor (d or (not b))) + x[14] + $ab9423a7, S43) + d;
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175 b := rol(b + (d xor (c or (not a))) + x[ 5] + $fc93a039, S44) + c;
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176 a := rol(a + (c xor (b or (not d))) + x[12] + $655b59c3, S41) + b;
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177 d := rol(d + (b xor (a or (not c))) + x[ 3] + $8f0ccc92, S42) + a;
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178 c := rol(c + (a xor (d or (not b))) + x[10] + $ffeff47d, S43) + d;
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179 b := rol(b + (d xor (c or (not a))) + x[ 1] + $85845dd1, S44) + c;
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180 a := rol(a + (c xor (b or (not d))) + x[ 8] + $6fa87e4f, S41) + b;
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181 d := rol(d + (b xor (a or (not c))) + x[15] + $fe2ce6e0, S42) + a;
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182 c := rol(c + (a xor (d or (not b))) + x[ 6] + $a3014314, S43) + d;
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183 b := rol(b + (d xor (c or (not a))) + x[13] + $4e0811a1, S44) + c;
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184 a := rol(a + (c xor (b or (not d))) + x[ 4] + $f7537e82, S41) + b;
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185 d := rol(d + (b xor (a or (not c))) + x[11] + $bd3af235, S42) + a;
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186 c := rol(c + (a xor (d or (not b))) + x[ 2] + $2ad7d2bb, S43) + d;
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187 b := rol(b + (d xor (c or (not a))) + x[ 9] + $eb86d391, S44) + c;
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195 procedure md5init(var state:tmd5state);
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197 state.h[0] := $67452301;
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198 state.h[1] := $EFCDAB89;
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199 state.h[2] := $98BADCFE;
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200 state.h[3] := $10325476;
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202 state.msglenhi := 0;
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205 procedure md5process(var state:tmd5state;const data;len:longint);
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209 p:dvar absolute data;
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211 b := state.msglen and 63;
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213 inc(state.msglen,len);
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214 while (state.msglen > $20000000) do begin
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215 dec(state.msglen,$20000000);
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216 inc(state.msglenhi);
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219 if b > 0 then begin
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221 if a > len then a := len;
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222 move(p[0],state.buf[b],a);
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225 if b+a = 64 then md5processblock(state.h,state.buf);
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226 if len = 0 then exit;
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228 while len >= 64 do begin
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229 md5processblock(state.h,p[ofs]);
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233 if len > 0 then move(p[ofs],state.buf[0],len);
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236 procedure md5finish(var state:tmd5state;var result);
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239 {$ifdef endian_big}
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240 h :tmd5 absolute state.h;
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241 r :tmd5 absolute result;
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245 b := state.msglen and 63;
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246 state.buf[b] := $80;
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247 if b >= 56 then begin
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248 {-- for a := b+1 to 63 do state.buf[a] := 0; }
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249 fillchar(state.buf[b+1],63-b,0);
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250 md5processblock(state.h,state.buf);
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251 fillchar(state.buf,56,0);
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253 {-- for a := b+1 to 55 do state.buf[a] := 0; }
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254 fillchar(state.buf[b+1],55-b,0);
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256 state.msglen := state.msglen shl 3;
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258 state.buf[56] := state.msglen;
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259 state.buf[57] := state.msglen shr 8;
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260 state.buf[58] := state.msglen shr 16;
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261 state.buf[59] := state.msglen shr 24;
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262 state.buf[60] := state.msglenhi;
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263 state.buf[61] := state.msglenhi shr 8;
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264 state.buf[62] := state.msglenhi shr 16;
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265 state.buf[63] := state.msglenhi shr 24;
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267 md5processblock(state.h,state.buf);
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268 {$ifdef ENDIAN_BIG}
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269 for counter := 0 to 15 do begin
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270 r[counter] := h[counter xor 3];
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273 move(state.h,result,16);
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275 fillchar(state,sizeof(state),0);
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278 procedure getmd5(const data;len:longint;var result);
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283 md5process(t,data,len);
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284 md5finish(t,result);
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287 function md5tostr(const md5:tmd5):string;
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293 for a := 0 to 15 do s := s + inttohex(md5[a],2);
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