| 1 |
/* rmd160.c - RIPE-MD160 |
| 2 |
* Copyright (C) 1998, 2001 Free Software Foundation, Inc. |
| 3 |
* |
| 4 |
* This file was taken from Libgcrypt cipher/rmd160.c |
| 5 |
* |
| 6 |
* This file is part of GPG. |
| 7 |
* |
| 8 |
* This program is free software; you can redistribute it and/or modify |
| 9 |
* it under the terms of the GNU General Public License as published by |
| 10 |
* the Free Software Foundation; either version 2 of the License, or |
| 11 |
* (at your option) any later version. |
| 12 |
* |
| 13 |
* This program is distributed in the hope that it will be useful, |
| 14 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 |
* GNU General Public License for more details. |
| 17 |
* |
| 18 |
* You should have received a copy of the GNU General Public License |
| 19 |
* along with this program; if not, write to the Free Software Foundation, |
| 20 |
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
| 21 |
*/ |
| 22 |
|
| 23 |
#include <string.h> |
| 24 |
|
| 25 |
#include "md.h" |
| 26 |
|
| 27 |
|
| 28 |
/********************************* |
| 29 |
* RIPEMD-160 is not patented, see (as of 25.10.97) |
| 30 |
* http://www.esat.kuleuven.ac.be/~bosselae/ripemd160.html |
| 31 |
* Note that the code uses Little Endian unsigned charorder, which is good for |
| 32 |
* 386 etc, but we must add some conversion when used on a big endian box. |
| 33 |
* |
| 34 |
* |
| 35 |
* Pseudo-code for RIPEMD-160 |
| 36 |
* |
| 37 |
* RIPEMD-160 is an iterative hash function that operates on 32-bit words. |
| 38 |
* The round function takes as input a 5-word chaining variable and a 16-word |
| 39 |
* message block and maps this to a new chaining variable. All operations are |
| 40 |
* defined on 32-bit words. Padding is identical to that of MD4. |
| 41 |
* |
| 42 |
* |
| 43 |
* RIPEMD-160: definitions |
| 44 |
* |
| 45 |
* |
| 46 |
* nonlinear functions at bit level: exor, mux, -, mux, - |
| 47 |
* |
| 48 |
* f(j, x, y, z) = x XOR y XOR z (0 <= j <= 15) |
| 49 |
* f(j, x, y, z) = (x AND y) OR (NOT(x) AND z) (16 <= j <= 31) |
| 50 |
* f(j, x, y, z) = (x OR NOT(y)) XOR z (32 <= j <= 47) |
| 51 |
* f(j, x, y, z) = (x AND z) OR (y AND NOT(z)) (48 <= j <= 63) |
| 52 |
* f(j, x, y, z) = x XOR (y OR NOT(z)) (64 <= j <= 79) |
| 53 |
* |
| 54 |
* |
| 55 |
* added constants (hexadecimal) |
| 56 |
* |
| 57 |
* K(j) = 0x00000000 (0 <= j <= 15) |
| 58 |
* K(j) = 0x5A827999 (16 <= j <= 31) int(2**30 x sqrt(2)) |
| 59 |
* K(j) = 0x6ED9EBA1 (32 <= j <= 47) int(2**30 x sqrt(3)) |
| 60 |
* K(j) = 0x8F1BBCDC (48 <= j <= 63) int(2**30 x sqrt(5)) |
| 61 |
* K(j) = 0xA953FD4E (64 <= j <= 79) int(2**30 x sqrt(7)) |
| 62 |
* K'(j) = 0x50A28BE6 (0 <= j <= 15) int(2**30 x cbrt(2)) |
| 63 |
* K'(j) = 0x5C4DD124 (16 <= j <= 31) int(2**30 x cbrt(3)) |
| 64 |
* K'(j) = 0x6D703EF3 (32 <= j <= 47) int(2**30 x cbrt(5)) |
| 65 |
* K'(j) = 0x7A6D76E9 (48 <= j <= 63) int(2**30 x cbrt(7)) |
| 66 |
* K'(j) = 0x00000000 (64 <= j <= 79) |
| 67 |
* |
| 68 |
* |
| 69 |
* selection of message word |
| 70 |
* |
| 71 |
* r(j) = j (0 <= j <= 15) |
| 72 |
* r(16..31) = 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8 |
| 73 |
* r(32..47) = 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12 |
| 74 |
* r(48..63) = 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2 |
| 75 |
* r(64..79) = 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13 |
| 76 |
* r0(0..15) = 5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12 |
| 77 |
* r0(16..31)= 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2 |
| 78 |
* r0(32..47)= 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13 |
| 79 |
* r0(48..63)= 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14 |
| 80 |
* r0(64..79)= 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11 |
| 81 |
* |
| 82 |
* |
| 83 |
* amount for rotate left (rol) |
| 84 |
* |
| 85 |
* s(0..15) = 11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8 |
| 86 |
* s(16..31) = 7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12 |
| 87 |
* s(32..47) = 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5 |
| 88 |
* s(48..63) = 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12 |
| 89 |
* s(64..79) = 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6 |
| 90 |
* s'(0..15) = 8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6 |
| 91 |
* s'(16..31)= 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11 |
| 92 |
* s'(32..47)= 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5 |
| 93 |
* s'(48..63)= 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8 |
| 94 |
* s'(64..79)= 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11 |
| 95 |
* |
| 96 |
* |
| 97 |
* initial value (hexadecimal) |
| 98 |
* |
| 99 |
* h0 = 0x67452301; h1 = 0xEFCDAB89; h2 = 0x98BADCFE; h3 = 0x10325476; |
| 100 |
* h4 = 0xC3D2E1F0; |
| 101 |
* |
| 102 |
* |
| 103 |
* RIPEMD-160: pseudo-code |
| 104 |
* |
| 105 |
* It is assumed that the message after padding consists of t 16-word blocks |
| 106 |
* that will be denoted with X[i][j], with 0 <= i <= t-1 and 0 <= j <= 15. |
| 107 |
* The symbol [+] denotes addition modulo 2**32 and rol_s denotes cyclic left |
| 108 |
* shift (rotate) over s positions. |
| 109 |
* |
| 110 |
* |
| 111 |
* for i := 0 to t-1 { |
| 112 |
* A := h0; B := h1; C := h2; D = h3; E = h4; |
| 113 |
* A' := h0; B' := h1; C' := h2; D' = h3; E' = h4; |
| 114 |
* for j := 0 to 79 { |
| 115 |
* T := rol_s(j)(A [+] f(j, B, C, D) [+] X[i][r(j)] [+] K(j)) [+] E; |
| 116 |
* A := E; E := D; D := rol_10(C); C := B; B := T; |
| 117 |
* T := rol_s'(j)(A' [+] f(79-j, B', C', D') [+] X[i][r'(j)] |
| 118 |
[+] K'(j)) [+] E'; |
| 119 |
* A' := E'; E' := D'; D' := rol_10(C'); C' := B'; B' := T; |
| 120 |
* } |
| 121 |
* T := h1 [+] C [+] D'; h1 := h2 [+] D [+] E'; h2 := h3 [+] E [+] A'; |
| 122 |
* h3 := h4 [+] A [+] B'; h4 := h0 [+] B [+] C'; h0 := T; |
| 123 |
* } |
| 124 |
*/ |
| 125 |
|
| 126 |
/* Some examples: |
| 127 |
* "" 9c1185a5c5e9fc54612808977ee8f548b2258d31 |
| 128 |
* "a" 0bdc9d2d256b3ee9daae347be6f4dc835a467ffe |
| 129 |
* "abc" 8eb208f7e05d987a9b044a8e98c6b087f15a0bfc |
| 130 |
* "message digest" 5d0689ef49d2fae572b881b123a85ffa21595f36 |
| 131 |
* "a...z" f71c27109c692c1b56bbdceb5b9d2865b3708dbc |
| 132 |
* "abcdbcde...nopq" 12a053384a9c0c88e405a06c27dcf49ada62eb2b |
| 133 |
* "A...Za...z0...9" b0e20b6e3116640286ed3a87a5713079b21f5189 |
| 134 |
* 8 times "1234567890" 9b752e45573d4b39f4dbd3323cab82bf63326bfb |
| 135 |
* 1 million times "a" 52783243c1697bdbe16d37f97f68f08325dc1528 |
| 136 |
*/ |
| 137 |
|
| 138 |
static void |
| 139 |
burn_stack (int bytes) |
| 140 |
{ |
| 141 |
char buf[150]; |
| 142 |
|
| 143 |
memset(buf, 0, sizeof buf); |
| 144 |
bytes -= sizeof buf; |
| 145 |
if (bytes > 0) |
| 146 |
burn_stack (bytes); |
| 147 |
} |
| 148 |
|
| 149 |
|
| 150 |
void |
| 151 |
rmd160_init( RMD160_CONTEXT *hd ) |
| 152 |
{ |
| 153 |
hd->h0 = 0x67452301; |
| 154 |
hd->h1 = 0xEFCDAB89; |
| 155 |
hd->h2 = 0x98BADCFE; |
| 156 |
hd->h3 = 0x10325476; |
| 157 |
hd->h4 = 0xC3D2E1F0; |
| 158 |
hd->nblocks = 0; |
| 159 |
hd->count = 0; |
| 160 |
} |
| 161 |
|
| 162 |
|
| 163 |
/**************** |
| 164 |
* Transform the message X which consists of 16 32-bit-words |
| 165 |
*/ |
| 166 |
static void |
| 167 |
transform( RMD160_CONTEXT *hd, unsigned char *data ) |
| 168 |
{ |
| 169 |
unsigned long a,b,c,d,e,aa,bb,cc,dd,ee,t; |
| 170 |
#ifdef BIG_ENDIAN_HOST |
| 171 |
unsigned long x[16]; |
| 172 |
{ int i; |
| 173 |
unsigned char *p2, *p1; |
| 174 |
for(i=0, p1=data, p2=(unsigned char*)x; i < 16; i++, p2 += 4 ) { |
| 175 |
p2[3] = *p1++; |
| 176 |
p2[2] = *p1++; |
| 177 |
p2[1] = *p1++; |
| 178 |
p2[0] = *p1++; |
| 179 |
} |
| 180 |
} |
| 181 |
#else |
| 182 |
/* this version is better because it is always aligned; |
| 183 |
* The performance penalty on a 586-100 is about 6% which |
| 184 |
* is acceptable - because the data is more local it might |
| 185 |
* also be possible that this is faster on some machines. |
| 186 |
* This function (when compiled with -02 on gcc 2.7.2) |
| 187 |
* executes on a 586-100 (39.73 bogomips) at about 1900kb/sec; |
| 188 |
* [measured with a 4MB data and "gpgm --print-md rmd160"] */ |
| 189 |
unsigned long x[16]; |
| 190 |
memcpy( x, data, 64 ); |
| 191 |
#endif |
| 192 |
|
| 193 |
|
| 194 |
#define K0 0x00000000 |
| 195 |
#define K1 0x5A827999 |
| 196 |
#define K2 0x6ED9EBA1 |
| 197 |
#define K3 0x8F1BBCDC |
| 198 |
#define K4 0xA953FD4E |
| 199 |
#define KK0 0x50A28BE6 |
| 200 |
#define KK1 0x5C4DD124 |
| 201 |
#define KK2 0x6D703EF3 |
| 202 |
#define KK3 0x7A6D76E9 |
| 203 |
#define KK4 0x00000000 |
| 204 |
#define F0(x,y,z) ( (x) ^ (y) ^ (z) ) |
| 205 |
#define F1(x,y,z) ( ((x) & (y)) | (~(x) & (z)) ) |
| 206 |
#define F2(x,y,z) ( ((x) | ~(y)) ^ (z) ) |
| 207 |
#define F3(x,y,z) ( ((x) & (z)) | ((y) & ~(z)) ) |
| 208 |
#define F4(x,y,z) ( (x) ^ ((y) | ~(z)) ) |
| 209 |
#define R(a,b,c,d,e,f,k,r,s) do { t = a + f(b,c,d) + k + x[r]; \ |
| 210 |
a = rol(t,s) + e; \ |
| 211 |
c = rol(c,10); \ |
| 212 |
} while(0) |
| 213 |
|
| 214 |
/* left lane */ |
| 215 |
a = hd->h0; |
| 216 |
b = hd->h1; |
| 217 |
c = hd->h2; |
| 218 |
d = hd->h3; |
| 219 |
e = hd->h4; |
| 220 |
R( a, b, c, d, e, F0, K0, 0, 11 ); |
| 221 |
R( e, a, b, c, d, F0, K0, 1, 14 ); |
| 222 |
R( d, e, a, b, c, F0, K0, 2, 15 ); |
| 223 |
R( c, d, e, a, b, F0, K0, 3, 12 ); |
| 224 |
R( b, c, d, e, a, F0, K0, 4, 5 ); |
| 225 |
R( a, b, c, d, e, F0, K0, 5, 8 ); |
| 226 |
R( e, a, b, c, d, F0, K0, 6, 7 ); |
| 227 |
R( d, e, a, b, c, F0, K0, 7, 9 ); |
| 228 |
R( c, d, e, a, b, F0, K0, 8, 11 ); |
| 229 |
R( b, c, d, e, a, F0, K0, 9, 13 ); |
| 230 |
R( a, b, c, d, e, F0, K0, 10, 14 ); |
| 231 |
R( e, a, b, c, d, F0, K0, 11, 15 ); |
| 232 |
R( d, e, a, b, c, F0, K0, 12, 6 ); |
| 233 |
R( c, d, e, a, b, F0, K0, 13, 7 ); |
| 234 |
R( b, c, d, e, a, F0, K0, 14, 9 ); |
| 235 |
R( a, b, c, d, e, F0, K0, 15, 8 ); |
| 236 |
R( e, a, b, c, d, F1, K1, 7, 7 ); |
| 237 |
R( d, e, a, b, c, F1, K1, 4, 6 ); |
| 238 |
R( c, d, e, a, b, F1, K1, 13, 8 ); |
| 239 |
R( b, c, d, e, a, F1, K1, 1, 13 ); |
| 240 |
R( a, b, c, d, e, F1, K1, 10, 11 ); |
| 241 |
R( e, a, b, c, d, F1, K1, 6, 9 ); |
| 242 |
R( d, e, a, b, c, F1, K1, 15, 7 ); |
| 243 |
R( c, d, e, a, b, F1, K1, 3, 15 ); |
| 244 |
R( b, c, d, e, a, F1, K1, 12, 7 ); |
| 245 |
R( a, b, c, d, e, F1, K1, 0, 12 ); |
| 246 |
R( e, a, b, c, d, F1, K1, 9, 15 ); |
| 247 |
R( d, e, a, b, c, F1, K1, 5, 9 ); |
| 248 |
R( c, d, e, a, b, F1, K1, 2, 11 ); |
| 249 |
R( b, c, d, e, a, F1, K1, 14, 7 ); |
| 250 |
R( a, b, c, d, e, F1, K1, 11, 13 ); |
| 251 |
R( e, a, b, c, d, F1, K1, 8, 12 ); |
| 252 |
R( d, e, a, b, c, F2, K2, 3, 11 ); |
| 253 |
R( c, d, e, a, b, F2, K2, 10, 13 ); |
| 254 |
R( b, c, d, e, a, F2, K2, 14, 6 ); |
| 255 |
R( a, b, c, d, e, F2, K2, 4, 7 ); |
| 256 |
R( e, a, b, c, d, F2, K2, 9, 14 ); |
| 257 |
R( d, e, a, b, c, F2, K2, 15, 9 ); |
| 258 |
R( c, d, e, a, b, F2, K2, 8, 13 ); |
| 259 |
R( b, c, d, e, a, F2, K2, 1, 15 ); |
| 260 |
R( a, b, c, d, e, F2, K2, 2, 14 ); |
| 261 |
R( e, a, b, c, d, F2, K2, 7, 8 ); |
| 262 |
R( d, e, a, b, c, F2, K2, 0, 13 ); |
| 263 |
R( c, d, e, a, b, F2, K2, 6, 6 ); |
| 264 |
R( b, c, d, e, a, F2, K2, 13, 5 ); |
| 265 |
R( a, b, c, d, e, F2, K2, 11, 12 ); |
| 266 |
R( e, a, b, c, d, F2, K2, 5, 7 ); |
| 267 |
R( d, e, a, b, c, F2, K2, 12, 5 ); |
| 268 |
R( c, d, e, a, b, F3, K3, 1, 11 ); |
| 269 |
R( b, c, d, e, a, F3, K3, 9, 12 ); |
| 270 |
R( a, b, c, d, e, F3, K3, 11, 14 ); |
| 271 |
R( e, a, b, c, d, F3, K3, 10, 15 ); |
| 272 |
R( d, e, a, b, c, F3, K3, 0, 14 ); |
| 273 |
R( c, d, e, a, b, F3, K3, 8, 15 ); |
| 274 |
R( b, c, d, e, a, F3, K3, 12, 9 ); |
| 275 |
R( a, b, c, d, e, F3, K3, 4, 8 ); |
| 276 |
R( e, a, b, c, d, F3, K3, 13, 9 ); |
| 277 |
R( d, e, a, b, c, F3, K3, 3, 14 ); |
| 278 |
R( c, d, e, a, b, F3, K3, 7, 5 ); |
| 279 |
R( b, c, d, e, a, F3, K3, 15, 6 ); |
| 280 |
R( a, b, c, d, e, F3, K3, 14, 8 ); |
| 281 |
R( e, a, b, c, d, F3, K3, 5, 6 ); |
| 282 |
R( d, e, a, b, c, F3, K3, 6, 5 ); |
| 283 |
R( c, d, e, a, b, F3, K3, 2, 12 ); |
| 284 |
R( b, c, d, e, a, F4, K4, 4, 9 ); |
| 285 |
R( a, b, c, d, e, F4, K4, 0, 15 ); |
| 286 |
R( e, a, b, c, d, F4, K4, 5, 5 ); |
| 287 |
R( d, e, a, b, c, F4, K4, 9, 11 ); |
| 288 |
R( c, d, e, a, b, F4, K4, 7, 6 ); |
| 289 |
R( b, c, d, e, a, F4, K4, 12, 8 ); |
| 290 |
R( a, b, c, d, e, F4, K4, 2, 13 ); |
| 291 |
R( e, a, b, c, d, F4, K4, 10, 12 ); |
| 292 |
R( d, e, a, b, c, F4, K4, 14, 5 ); |
| 293 |
R( c, d, e, a, b, F4, K4, 1, 12 ); |
| 294 |
R( b, c, d, e, a, F4, K4, 3, 13 ); |
| 295 |
R( a, b, c, d, e, F4, K4, 8, 14 ); |
| 296 |
R( e, a, b, c, d, F4, K4, 11, 11 ); |
| 297 |
R( d, e, a, b, c, F4, K4, 6, 8 ); |
| 298 |
R( c, d, e, a, b, F4, K4, 15, 5 ); |
| 299 |
R( b, c, d, e, a, F4, K4, 13, 6 ); |
| 300 |
|
| 301 |
aa = a; bb = b; cc = c; dd = d; ee = e; |
| 302 |
|
| 303 |
/* right lane */ |
| 304 |
a = hd->h0; |
| 305 |
b = hd->h1; |
| 306 |
c = hd->h2; |
| 307 |
d = hd->h3; |
| 308 |
e = hd->h4; |
| 309 |
R( a, b, c, d, e, F4, KK0, 5, 8); |
| 310 |
R( e, a, b, c, d, F4, KK0, 14, 9); |
| 311 |
R( d, e, a, b, c, F4, KK0, 7, 9); |
| 312 |
R( c, d, e, a, b, F4, KK0, 0, 11); |
| 313 |
R( b, c, d, e, a, F4, KK0, 9, 13); |
| 314 |
R( a, b, c, d, e, F4, KK0, 2, 15); |
| 315 |
R( e, a, b, c, d, F4, KK0, 11, 15); |
| 316 |
R( d, e, a, b, c, F4, KK0, 4, 5); |
| 317 |
R( c, d, e, a, b, F4, KK0, 13, 7); |
| 318 |
R( b, c, d, e, a, F4, KK0, 6, 7); |
| 319 |
R( a, b, c, d, e, F4, KK0, 15, 8); |
| 320 |
R( e, a, b, c, d, F4, KK0, 8, 11); |
| 321 |
R( d, e, a, b, c, F4, KK0, 1, 14); |
| 322 |
R( c, d, e, a, b, F4, KK0, 10, 14); |
| 323 |
R( b, c, d, e, a, F4, KK0, 3, 12); |
| 324 |
R( a, b, c, d, e, F4, KK0, 12, 6); |
| 325 |
R( e, a, b, c, d, F3, KK1, 6, 9); |
| 326 |
R( d, e, a, b, c, F3, KK1, 11, 13); |
| 327 |
R( c, d, e, a, b, F3, KK1, 3, 15); |
| 328 |
R( b, c, d, e, a, F3, KK1, 7, 7); |
| 329 |
R( a, b, c, d, e, F3, KK1, 0, 12); |
| 330 |
R( e, a, b, c, d, F3, KK1, 13, 8); |
| 331 |
R( d, e, a, b, c, F3, KK1, 5, 9); |
| 332 |
R( c, d, e, a, b, F3, KK1, 10, 11); |
| 333 |
R( b, c, d, e, a, F3, KK1, 14, 7); |
| 334 |
R( a, b, c, d, e, F3, KK1, 15, 7); |
| 335 |
R( e, a, b, c, d, F3, KK1, 8, 12); |
| 336 |
R( d, e, a, b, c, F3, KK1, 12, 7); |
| 337 |
R( c, d, e, a, b, F3, KK1, 4, 6); |
| 338 |
R( b, c, d, e, a, F3, KK1, 9, 15); |
| 339 |
R( a, b, c, d, e, F3, KK1, 1, 13); |
| 340 |
R( e, a, b, c, d, F3, KK1, 2, 11); |
| 341 |
R( d, e, a, b, c, F2, KK2, 15, 9); |
| 342 |
R( c, d, e, a, b, F2, KK2, 5, 7); |
| 343 |
R( b, c, d, e, a, F2, KK2, 1, 15); |
| 344 |
R( a, b, c, d, e, F2, KK2, 3, 11); |
| 345 |
R( e, a, b, c, d, F2, KK2, 7, 8); |
| 346 |
R( d, e, a, b, c, F2, KK2, 14, 6); |
| 347 |
R( c, d, e, a, b, F2, KK2, 6, 6); |
| 348 |
R( b, c, d, e, a, F2, KK2, 9, 14); |
| 349 |
R( a, b, c, d, e, F2, KK2, 11, 12); |
| 350 |
R( e, a, b, c, d, F2, KK2, 8, 13); |
| 351 |
R( d, e, a, b, c, F2, KK2, 12, 5); |
| 352 |
R( c, d, e, a, b, F2, KK2, 2, 14); |
| 353 |
R( b, c, d, e, a, F2, KK2, 10, 13); |
| 354 |
R( a, b, c, d, e, F2, KK2, 0, 13); |
| 355 |
R( e, a, b, c, d, F2, KK2, 4, 7); |
| 356 |
R( d, e, a, b, c, F2, KK2, 13, 5); |
| 357 |
R( c, d, e, a, b, F1, KK3, 8, 15); |
| 358 |
R( b, c, d, e, a, F1, KK3, 6, 5); |
| 359 |
R( a, b, c, d, e, F1, KK3, 4, 8); |
| 360 |
R( e, a, b, c, d, F1, KK3, 1, 11); |
| 361 |
R( d, e, a, b, c, F1, KK3, 3, 14); |
| 362 |
R( c, d, e, a, b, F1, KK3, 11, 14); |
| 363 |
R( b, c, d, e, a, F1, KK3, 15, 6); |
| 364 |
R( a, b, c, d, e, F1, KK3, 0, 14); |
| 365 |
R( e, a, b, c, d, F1, KK3, 5, 6); |
| 366 |
R( d, e, a, b, c, F1, KK3, 12, 9); |
| 367 |
R( c, d, e, a, b, F1, KK3, 2, 12); |
| 368 |
R( b, c, d, e, a, F1, KK3, 13, 9); |
| 369 |
R( a, b, c, d, e, F1, KK3, 9, 12); |
| 370 |
R( e, a, b, c, d, F1, KK3, 7, 5); |
| 371 |
R( d, e, a, b, c, F1, KK3, 10, 15); |
| 372 |
R( c, d, e, a, b, F1, KK3, 14, 8); |
| 373 |
R( b, c, d, e, a, F0, KK4, 12, 8); |
| 374 |
R( a, b, c, d, e, F0, KK4, 15, 5); |
| 375 |
R( e, a, b, c, d, F0, KK4, 10, 12); |
| 376 |
R( d, e, a, b, c, F0, KK4, 4, 9); |
| 377 |
R( c, d, e, a, b, F0, KK4, 1, 12); |
| 378 |
R( b, c, d, e, a, F0, KK4, 5, 5); |
| 379 |
R( a, b, c, d, e, F0, KK4, 8, 14); |
| 380 |
R( e, a, b, c, d, F0, KK4, 7, 6); |
| 381 |
R( d, e, a, b, c, F0, KK4, 6, 8); |
| 382 |
R( c, d, e, a, b, F0, KK4, 2, 13); |
| 383 |
R( b, c, d, e, a, F0, KK4, 13, 6); |
| 384 |
R( a, b, c, d, e, F0, KK4, 14, 5); |
| 385 |
R( e, a, b, c, d, F0, KK4, 0, 15); |
| 386 |
R( d, e, a, b, c, F0, KK4, 3, 13); |
| 387 |
R( c, d, e, a, b, F0, KK4, 9, 11); |
| 388 |
R( b, c, d, e, a, F0, KK4, 11, 11); |
| 389 |
|
| 390 |
|
| 391 |
t = hd->h1 + d + cc; |
| 392 |
hd->h1 = hd->h2 + e + dd; |
| 393 |
hd->h2 = hd->h3 + a + ee; |
| 394 |
hd->h3 = hd->h4 + b + aa; |
| 395 |
hd->h4 = hd->h0 + c + bb; |
| 396 |
hd->h0 = t; |
| 397 |
} |
| 398 |
|
| 399 |
|
| 400 |
/* Update the message digest with the contents |
| 401 |
* of INBUF with length INLEN. |
| 402 |
*/ |
| 403 |
void |
| 404 |
rmd160_write( RMD160_CONTEXT *hd, unsigned char *inbuf, size_t inlen) |
| 405 |
{ |
| 406 |
if( hd->count == 64 ) { /* flush the buffer */ |
| 407 |
transform( hd, hd->buf ); |
| 408 |
burn_stack (108+5*sizeof(void*)); |
| 409 |
hd->count = 0; |
| 410 |
hd->nblocks++; |
| 411 |
} |
| 412 |
if( !inbuf ) |
| 413 |
return; |
| 414 |
if( hd->count ) { |
| 415 |
for( ; inlen && hd->count < 64; inlen-- ) |
| 416 |
hd->buf[hd->count++] = *inbuf++; |
| 417 |
rmd160_write( hd, NULL, 0 ); |
| 418 |
if( !inlen ) |
| 419 |
return; |
| 420 |
} |
| 421 |
|
| 422 |
while( inlen >= 64 ) { |
| 423 |
transform( hd, inbuf ); |
| 424 |
hd->count = 0; |
| 425 |
hd->nblocks++; |
| 426 |
inlen -= 64; |
| 427 |
inbuf += 64; |
| 428 |
} |
| 429 |
burn_stack (108+5*sizeof(void*)); |
| 430 |
for( ; inlen && hd->count < 64; inlen-- ) |
| 431 |
hd->buf[hd->count++] = *inbuf++; |
| 432 |
} |
| 433 |
|
| 434 |
/**************** |
| 435 |
* Apply the rmd160 transform function on the buffer which must have |
| 436 |
* a length 64 unsigned chars. Do not use this function together with the |
| 437 |
* other functions, use rmd160_init to initialize internal variables. |
| 438 |
* Returns: 16 unsigned chars in buffer with the mixed contentes of buffer. |
| 439 |
*/ |
| 440 |
void |
| 441 |
rmd160_mixblock( RMD160_CONTEXT *hd, char *buffer ) |
| 442 |
{ |
| 443 |
char *p = buffer; |
| 444 |
transform( hd, buffer ); |
| 445 |
#define X(a) do { *(unsigned long*)p = hd->h##a ; p += 4; } while(0) |
| 446 |
X(0); |
| 447 |
X(1); |
| 448 |
X(2); |
| 449 |
X(3); |
| 450 |
X(4); |
| 451 |
#undef X |
| 452 |
} |
| 453 |
|
| 454 |
|
| 455 |
/* The routine terminates the computation |
| 456 |
*/ |
| 457 |
|
| 458 |
void |
| 459 |
rmd160_final( RMD160_CONTEXT *hd ) |
| 460 |
{ |
| 461 |
unsigned long t, msb, lsb; |
| 462 |
unsigned char *p; |
| 463 |
|
| 464 |
rmd160_write(hd, NULL, 0); /* flush */; |
| 465 |
|
| 466 |
t = hd->nblocks; |
| 467 |
/* multiply by 64 to make a unsigned char count */ |
| 468 |
lsb = t << 6; |
| 469 |
msb = t >> 26; |
| 470 |
/* add the count */ |
| 471 |
t = lsb; |
| 472 |
if( (lsb += hd->count) < t ) |
| 473 |
msb++; |
| 474 |
/* multiply by 8 to make a bit count */ |
| 475 |
t = lsb; |
| 476 |
lsb <<= 3; |
| 477 |
msb <<= 3; |
| 478 |
msb |= t >> 29; |
| 479 |
|
| 480 |
if( hd->count < 56 ) { /* enough room */ |
| 481 |
hd->buf[hd->count++] = 0x80; /* pad */ |
| 482 |
while( hd->count < 56 ) |
| 483 |
hd->buf[hd->count++] = 0; /* pad */ |
| 484 |
} |
| 485 |
else { /* need one extra block */ |
| 486 |
hd->buf[hd->count++] = 0x80; /* pad character */ |
| 487 |
while( hd->count < 64 ) |
| 488 |
hd->buf[hd->count++] = 0; |
| 489 |
rmd160_write(hd, NULL, 0); /* flush */; |
| 490 |
memset(hd->buf, 0, 56 ); /* fill next block with zeroes */ |
| 491 |
} |
| 492 |
/* append the 64 bit count */ |
| 493 |
hd->buf[56] = lsb ; |
| 494 |
hd->buf[57] = lsb >> 8; |
| 495 |
hd->buf[58] = lsb >> 16; |
| 496 |
hd->buf[59] = lsb >> 24; |
| 497 |
hd->buf[60] = msb ; |
| 498 |
hd->buf[61] = msb >> 8; |
| 499 |
hd->buf[62] = msb >> 16; |
| 500 |
hd->buf[63] = msb >> 24; |
| 501 |
transform( hd, hd->buf ); |
| 502 |
burn_stack (108+5*sizeof(void*)); |
| 503 |
|
| 504 |
p = hd->buf; |
| 505 |
#ifdef BIG_ENDIAN_HOST |
| 506 |
#define X(a) do { *p++ = hd->h##a ; *p++ = hd->h##a >> 8; \ |
| 507 |
*p++ = hd->h##a >> 16; *p++ = hd->h##a >> 24; } while(0) |
| 508 |
#else /* little endian */ |
| 509 |
#define X(a) do { *(unsigned long*)p = hd->h##a ; p += 4; } while(0) |
| 510 |
#endif |
| 511 |
X(0); |
| 512 |
X(1); |
| 513 |
X(2); |
| 514 |
X(3); |
| 515 |
X(4); |
| 516 |
#undef X |
| 517 |
} |
| 518 |
|
| 519 |
unsigned char * |
| 520 |
rmd160_read( RMD160_CONTEXT *hd ) |
| 521 |
{ |
| 522 |
return hd->buf; |
| 523 |
} |
Parent Directory
| 
Revision Log