The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/opencrypto/rmd160.c

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    1 /*      $FreeBSD: stable/4/sys/opencrypto/rmd160.c 107150 2002-11-21 23:34:23Z sam $    */
    2 /*      $OpenBSD: rmd160.c,v 1.3 2001/09/26 21:40:13 markus Exp $       */
    3 /*
    4  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  */
   26 /*
   27  * Preneel, Bosselaers, Dobbertin, "The Cryptographic Hash Function RIPEMD-160",
   28  * RSA Laboratories, CryptoBytes, Volume 3, Number 2, Autumn 1997,
   29  * ftp://ftp.rsasecurity.com/pub/cryptobytes/crypto3n2.pdf
   30  */
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/endian.h>
   34 #include <opencrypto/rmd160.h>
   35 
   36 #define PUT_64BIT_LE(cp, value) do { \
   37         (cp)[7] = (value) >> 56; \
   38         (cp)[6] = (value) >> 48; \
   39         (cp)[5] = (value) >> 40; \
   40         (cp)[4] = (value) >> 32; \
   41         (cp)[3] = (value) >> 24; \
   42         (cp)[2] = (value) >> 16; \
   43         (cp)[1] = (value) >> 8; \
   44         (cp)[0] = (value); } while (0)
   45 
   46 #define PUT_32BIT_LE(cp, value) do { \
   47         (cp)[3] = (value) >> 24; \
   48         (cp)[2] = (value) >> 16; \
   49         (cp)[1] = (value) >> 8; \
   50         (cp)[0] = (value); } while (0)
   51 
   52 #define H0      0x67452301U
   53 #define H1      0xEFCDAB89U
   54 #define H2      0x98BADCFEU
   55 #define H3      0x10325476U
   56 #define H4      0xC3D2E1F0U
   57 
   58 #define K0      0x00000000U
   59 #define K1      0x5A827999U
   60 #define K2      0x6ED9EBA1U
   61 #define K3      0x8F1BBCDCU
   62 #define K4      0xA953FD4EU
   63 
   64 #define KK0     0x50A28BE6U
   65 #define KK1     0x5C4DD124U
   66 #define KK2     0x6D703EF3U
   67 #define KK3     0x7A6D76E9U
   68 #define KK4     0x00000000U
   69 
   70 /* rotate x left n bits.  */
   71 #define ROL(n, x) (((x) << (n)) | ((x) >> (32-(n))))
   72 
   73 #define F0(x, y, z) ((x) ^ (y) ^ (z))
   74 #define F1(x, y, z) (((x) & (y)) | ((~x) & (z)))
   75 #define F2(x, y, z) (((x) | (~y)) ^ (z))
   76 #define F3(x, y, z) (((x) & (z)) | ((y) & (~z)))
   77 #define F4(x, y, z) ((x) ^ ((y) | (~z)))
   78 
   79 #define R(a, b, c, d, e, Fj, Kj, sj, rj) \
   80         do { \
   81                 a = ROL(sj, a + Fj(b,c,d) + X(rj) + Kj) + e; \
   82                 c = ROL(10, c); \
   83         } while(0)
   84 
   85 #define X(i)    x[i]
   86 
   87 static u_char PADDING[64] = {
   88         0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
   89         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
   90         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
   91 };
   92 
   93 void
   94 RMD160Init(RMD160_CTX *ctx)
   95 {
   96         ctx->count = 0;
   97         ctx->state[0] = H0;
   98         ctx->state[1] = H1;
   99         ctx->state[2] = H2;
  100         ctx->state[3] = H3;
  101         ctx->state[4] = H4;
  102 }
  103 
  104 void
  105 RMD160Update(RMD160_CTX *ctx, const u_char *input, u_int32_t len)
  106 {
  107         u_int32_t have, off, need;
  108 
  109         have = (ctx->count/8) % 64;
  110         need = 64 - have;
  111         ctx->count += 8 * len;
  112         off = 0;
  113 
  114         if (len >= need) {
  115                 if (have) {
  116                         memcpy(ctx->buffer + have, input, need);
  117                         RMD160Transform(ctx->state, ctx->buffer);
  118                         off = need;
  119                         have = 0;
  120                 }
  121                 /* now the buffer is empty */
  122                 while (off + 64 <= len) {
  123                         RMD160Transform(ctx->state, input+off);
  124                         off += 64;
  125                 }
  126         }
  127         if (off < len)
  128                 memcpy(ctx->buffer + have, input+off, len-off);
  129 }
  130 
  131 void
  132 RMD160Final(u_char digest[20], RMD160_CTX *ctx)
  133 {
  134         int i;
  135         u_char size[8];
  136         u_int32_t padlen;
  137 
  138         PUT_64BIT_LE(size, ctx->count);
  139 
  140         /*
  141          * pad to 64 byte blocks, at least one byte from PADDING plus 8 bytes
  142          * for the size
  143          */
  144         padlen = 64 - ((ctx->count/8) % 64);
  145         if (padlen < 1 + 8)
  146                 padlen += 64;
  147         RMD160Update(ctx, PADDING, padlen - 8);         /* padlen - 8 <= 64 */
  148         RMD160Update(ctx, size, 8);
  149 
  150         if (digest != NULL)
  151                 for (i = 0; i < 5; i++)
  152                         PUT_32BIT_LE(digest + i*4, ctx->state[i]);
  153 
  154         memset(ctx, 0, sizeof (*ctx));
  155 }
  156 
  157 void
  158 RMD160Transform(u_int32_t state[5], const u_char block[64])
  159 {
  160         u_int32_t a, b, c, d, e, aa, bb, cc, dd, ee, t, x[16];
  161 
  162 #if BYTE_ORDER == LITTLE_ENDIAN
  163         memcpy(x, block, 64);
  164 #else
  165         int i;
  166 
  167         for (i = 0; i < 16; i++)
  168                 x[i] = bswap32(*(const u_int32_t*)(block+i*4));
  169 #endif
  170 
  171         a = state[0];
  172         b = state[1];
  173         c = state[2];
  174         d = state[3];
  175         e = state[4];
  176 
  177         /* Round 1 */
  178         R(a, b, c, d, e, F0, K0, 11,  0);
  179         R(e, a, b, c, d, F0, K0, 14,  1);
  180         R(d, e, a, b, c, F0, K0, 15,  2);
  181         R(c, d, e, a, b, F0, K0, 12,  3);
  182         R(b, c, d, e, a, F0, K0,  5,  4);
  183         R(a, b, c, d, e, F0, K0,  8,  5);
  184         R(e, a, b, c, d, F0, K0,  7,  6);
  185         R(d, e, a, b, c, F0, K0,  9,  7);
  186         R(c, d, e, a, b, F0, K0, 11,  8);
  187         R(b, c, d, e, a, F0, K0, 13,  9);
  188         R(a, b, c, d, e, F0, K0, 14, 10);
  189         R(e, a, b, c, d, F0, K0, 15, 11);
  190         R(d, e, a, b, c, F0, K0,  6, 12);
  191         R(c, d, e, a, b, F0, K0,  7, 13);
  192         R(b, c, d, e, a, F0, K0,  9, 14);
  193         R(a, b, c, d, e, F0, K0,  8, 15); /* #15 */
  194         /* Round 2 */
  195         R(e, a, b, c, d, F1, K1,  7,  7);
  196         R(d, e, a, b, c, F1, K1,  6,  4);
  197         R(c, d, e, a, b, F1, K1,  8, 13);
  198         R(b, c, d, e, a, F1, K1, 13,  1);
  199         R(a, b, c, d, e, F1, K1, 11, 10);
  200         R(e, a, b, c, d, F1, K1,  9,  6);
  201         R(d, e, a, b, c, F1, K1,  7, 15);
  202         R(c, d, e, a, b, F1, K1, 15,  3);
  203         R(b, c, d, e, a, F1, K1,  7, 12);
  204         R(a, b, c, d, e, F1, K1, 12,  0);
  205         R(e, a, b, c, d, F1, K1, 15,  9);
  206         R(d, e, a, b, c, F1, K1,  9,  5);
  207         R(c, d, e, a, b, F1, K1, 11,  2);
  208         R(b, c, d, e, a, F1, K1,  7, 14);
  209         R(a, b, c, d, e, F1, K1, 13, 11);
  210         R(e, a, b, c, d, F1, K1, 12,  8); /* #31 */
  211         /* Round 3 */
  212         R(d, e, a, b, c, F2, K2, 11,  3);
  213         R(c, d, e, a, b, F2, K2, 13, 10);
  214         R(b, c, d, e, a, F2, K2,  6, 14);
  215         R(a, b, c, d, e, F2, K2,  7,  4);
  216         R(e, a, b, c, d, F2, K2, 14,  9);
  217         R(d, e, a, b, c, F2, K2,  9, 15);
  218         R(c, d, e, a, b, F2, K2, 13,  8);
  219         R(b, c, d, e, a, F2, K2, 15,  1);
  220         R(a, b, c, d, e, F2, K2, 14,  2);
  221         R(e, a, b, c, d, F2, K2,  8,  7);
  222         R(d, e, a, b, c, F2, K2, 13,  0);
  223         R(c, d, e, a, b, F2, K2,  6,  6);
  224         R(b, c, d, e, a, F2, K2,  5, 13);
  225         R(a, b, c, d, e, F2, K2, 12, 11);
  226         R(e, a, b, c, d, F2, K2,  7,  5);
  227         R(d, e, a, b, c, F2, K2,  5, 12); /* #47 */
  228         /* Round 4 */
  229         R(c, d, e, a, b, F3, K3, 11,  1);
  230         R(b, c, d, e, a, F3, K3, 12,  9);
  231         R(a, b, c, d, e, F3, K3, 14, 11);
  232         R(e, a, b, c, d, F3, K3, 15, 10);
  233         R(d, e, a, b, c, F3, K3, 14,  0);
  234         R(c, d, e, a, b, F3, K3, 15,  8);
  235         R(b, c, d, e, a, F3, K3,  9, 12);
  236         R(a, b, c, d, e, F3, K3,  8,  4);
  237         R(e, a, b, c, d, F3, K3,  9, 13);
  238         R(d, e, a, b, c, F3, K3, 14,  3);
  239         R(c, d, e, a, b, F3, K3,  5,  7);
  240         R(b, c, d, e, a, F3, K3,  6, 15);
  241         R(a, b, c, d, e, F3, K3,  8, 14);
  242         R(e, a, b, c, d, F3, K3,  6,  5);
  243         R(d, e, a, b, c, F3, K3,  5,  6);
  244         R(c, d, e, a, b, F3, K3, 12,  2); /* #63 */
  245         /* Round 5 */
  246         R(b, c, d, e, a, F4, K4,  9,  4);
  247         R(a, b, c, d, e, F4, K4, 15,  0);
  248         R(e, a, b, c, d, F4, K4,  5,  5);
  249         R(d, e, a, b, c, F4, K4, 11,  9);
  250         R(c, d, e, a, b, F4, K4,  6,  7);
  251         R(b, c, d, e, a, F4, K4,  8, 12);
  252         R(a, b, c, d, e, F4, K4, 13,  2);
  253         R(e, a, b, c, d, F4, K4, 12, 10);
  254         R(d, e, a, b, c, F4, K4,  5, 14);
  255         R(c, d, e, a, b, F4, K4, 12,  1);
  256         R(b, c, d, e, a, F4, K4, 13,  3);
  257         R(a, b, c, d, e, F4, K4, 14,  8);
  258         R(e, a, b, c, d, F4, K4, 11, 11);
  259         R(d, e, a, b, c, F4, K4,  8,  6);
  260         R(c, d, e, a, b, F4, K4,  5, 15);
  261         R(b, c, d, e, a, F4, K4,  6, 13); /* #79 */
  262 
  263         aa = a ; bb = b; cc = c; dd = d; ee = e;
  264 
  265         a = state[0];
  266         b = state[1];
  267         c = state[2];
  268         d = state[3];
  269         e = state[4];
  270 
  271         /* Parallel round 1 */
  272         R(a, b, c, d, e, F4, KK0,  8,  5);
  273         R(e, a, b, c, d, F4, KK0,  9, 14);
  274         R(d, e, a, b, c, F4, KK0,  9,  7);
  275         R(c, d, e, a, b, F4, KK0, 11,  0);
  276         R(b, c, d, e, a, F4, KK0, 13,  9);
  277         R(a, b, c, d, e, F4, KK0, 15,  2);
  278         R(e, a, b, c, d, F4, KK0, 15, 11);
  279         R(d, e, a, b, c, F4, KK0,  5,  4);
  280         R(c, d, e, a, b, F4, KK0,  7, 13);
  281         R(b, c, d, e, a, F4, KK0,  7,  6);
  282         R(a, b, c, d, e, F4, KK0,  8, 15);
  283         R(e, a, b, c, d, F4, KK0, 11,  8);
  284         R(d, e, a, b, c, F4, KK0, 14,  1);
  285         R(c, d, e, a, b, F4, KK0, 14, 10);
  286         R(b, c, d, e, a, F4, KK0, 12,  3);
  287         R(a, b, c, d, e, F4, KK0,  6, 12); /* #15 */
  288         /* Parallel round 2 */
  289         R(e, a, b, c, d, F3, KK1,  9,  6);
  290         R(d, e, a, b, c, F3, KK1, 13, 11);
  291         R(c, d, e, a, b, F3, KK1, 15,  3);
  292         R(b, c, d, e, a, F3, KK1,  7,  7);
  293         R(a, b, c, d, e, F3, KK1, 12,  0);
  294         R(e, a, b, c, d, F3, KK1,  8, 13);
  295         R(d, e, a, b, c, F3, KK1,  9,  5);
  296         R(c, d, e, a, b, F3, KK1, 11, 10);
  297         R(b, c, d, e, a, F3, KK1,  7, 14);
  298         R(a, b, c, d, e, F3, KK1,  7, 15);
  299         R(e, a, b, c, d, F3, KK1, 12,  8);
  300         R(d, e, a, b, c, F3, KK1,  7, 12);
  301         R(c, d, e, a, b, F3, KK1,  6,  4);
  302         R(b, c, d, e, a, F3, KK1, 15,  9);
  303         R(a, b, c, d, e, F3, KK1, 13,  1);
  304         R(e, a, b, c, d, F3, KK1, 11,  2); /* #31 */
  305         /* Parallel round 3 */
  306         R(d, e, a, b, c, F2, KK2,  9, 15);
  307         R(c, d, e, a, b, F2, KK2,  7,  5);
  308         R(b, c, d, e, a, F2, KK2, 15,  1);
  309         R(a, b, c, d, e, F2, KK2, 11,  3);
  310         R(e, a, b, c, d, F2, KK2,  8,  7);
  311         R(d, e, a, b, c, F2, KK2,  6, 14);
  312         R(c, d, e, a, b, F2, KK2,  6,  6);
  313         R(b, c, d, e, a, F2, KK2, 14,  9);
  314         R(a, b, c, d, e, F2, KK2, 12, 11);
  315         R(e, a, b, c, d, F2, KK2, 13,  8);
  316         R(d, e, a, b, c, F2, KK2,  5, 12);
  317         R(c, d, e, a, b, F2, KK2, 14,  2);
  318         R(b, c, d, e, a, F2, KK2, 13, 10);
  319         R(a, b, c, d, e, F2, KK2, 13,  0);
  320         R(e, a, b, c, d, F2, KK2,  7,  4);
  321         R(d, e, a, b, c, F2, KK2,  5, 13); /* #47 */
  322         /* Parallel round 4 */
  323         R(c, d, e, a, b, F1, KK3, 15,  8);
  324         R(b, c, d, e, a, F1, KK3,  5,  6);
  325         R(a, b, c, d, e, F1, KK3,  8,  4);
  326         R(e, a, b, c, d, F1, KK3, 11,  1);
  327         R(d, e, a, b, c, F1, KK3, 14,  3);
  328         R(c, d, e, a, b, F1, KK3, 14, 11);
  329         R(b, c, d, e, a, F1, KK3,  6, 15);
  330         R(a, b, c, d, e, F1, KK3, 14,  0);
  331         R(e, a, b, c, d, F1, KK3,  6,  5);
  332         R(d, e, a, b, c, F1, KK3,  9, 12);
  333         R(c, d, e, a, b, F1, KK3, 12,  2);
  334         R(b, c, d, e, a, F1, KK3,  9, 13);
  335         R(a, b, c, d, e, F1, KK3, 12,  9);
  336         R(e, a, b, c, d, F1, KK3,  5,  7);
  337         R(d, e, a, b, c, F1, KK3, 15, 10);
  338         R(c, d, e, a, b, F1, KK3,  8, 14); /* #63 */
  339         /* Parallel round 5 */
  340         R(b, c, d, e, a, F0, KK4,  8, 12);
  341         R(a, b, c, d, e, F0, KK4,  5, 15);
  342         R(e, a, b, c, d, F0, KK4, 12, 10);
  343         R(d, e, a, b, c, F0, KK4,  9,  4);
  344         R(c, d, e, a, b, F0, KK4, 12,  1);
  345         R(b, c, d, e, a, F0, KK4,  5,  5);
  346         R(a, b, c, d, e, F0, KK4, 14,  8);
  347         R(e, a, b, c, d, F0, KK4,  6,  7);
  348         R(d, e, a, b, c, F0, KK4,  8,  6);
  349         R(c, d, e, a, b, F0, KK4, 13,  2);
  350         R(b, c, d, e, a, F0, KK4,  6, 13);
  351         R(a, b, c, d, e, F0, KK4,  5, 14);
  352         R(e, a, b, c, d, F0, KK4, 15,  0);
  353         R(d, e, a, b, c, F0, KK4, 13,  3);
  354         R(c, d, e, a, b, F0, KK4, 11,  9);
  355         R(b, c, d, e, a, F0, KK4, 11, 11); /* #79 */
  356 
  357         t =        state[1] + cc + d;
  358         state[1] = state[2] + dd + e;
  359         state[2] = state[3] + ee + a;
  360         state[3] = state[4] + aa + b;
  361         state[4] = state[0] + bb + c;
  362         state[0] = t;
  363 }

Cache object: b9b16d9cb31b46d29936f6880aff8a71


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