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: src/sys/opencrypto/rmd160.c,v 1.3 2005/01/07 02:29:16 imp Exp $       */
    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 /*
   28  * Preneel, Bosselaers, Dobbertin, "The Cryptographic Hash Function RIPEMD-160",
   29  * RSA Laboratories, CryptoBytes, Volume 3, Number 2, Autumn 1997,
   30  * ftp://ftp.rsasecurity.com/pub/cryptobytes/crypto3n2.pdf
   31  */
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/endian.h>
   36 #include <opencrypto/rmd160.h>
   37 
   38 #define PUT_64BIT_LE(cp, value) do { \
   39         (cp)[7] = (value) >> 56; \
   40         (cp)[6] = (value) >> 48; \
   41         (cp)[5] = (value) >> 40; \
   42         (cp)[4] = (value) >> 32; \
   43         (cp)[3] = (value) >> 24; \
   44         (cp)[2] = (value) >> 16; \
   45         (cp)[1] = (value) >> 8; \
   46         (cp)[0] = (value); } while (0)
   47 
   48 #define PUT_32BIT_LE(cp, value) do { \
   49         (cp)[3] = (value) >> 24; \
   50         (cp)[2] = (value) >> 16; \
   51         (cp)[1] = (value) >> 8; \
   52         (cp)[0] = (value); } while (0)
   53 
   54 #define H0      0x67452301U
   55 #define H1      0xEFCDAB89U
   56 #define H2      0x98BADCFEU
   57 #define H3      0x10325476U
   58 #define H4      0xC3D2E1F0U
   59 
   60 #define K0      0x00000000U
   61 #define K1      0x5A827999U
   62 #define K2      0x6ED9EBA1U
   63 #define K3      0x8F1BBCDCU
   64 #define K4      0xA953FD4EU
   65 
   66 #define KK0     0x50A28BE6U
   67 #define KK1     0x5C4DD124U
   68 #define KK2     0x6D703EF3U
   69 #define KK3     0x7A6D76E9U
   70 #define KK4     0x00000000U
   71 
   72 /* rotate x left n bits.  */
   73 #define ROL(n, x) (((x) << (n)) | ((x) >> (32-(n))))
   74 
   75 #define F0(x, y, z) ((x) ^ (y) ^ (z))
   76 #define F1(x, y, z) (((x) & (y)) | ((~x) & (z)))
   77 #define F2(x, y, z) (((x) | (~y)) ^ (z))
   78 #define F3(x, y, z) (((x) & (z)) | ((y) & (~z)))
   79 #define F4(x, y, z) ((x) ^ ((y) | (~z)))
   80 
   81 #define R(a, b, c, d, e, Fj, Kj, sj, rj) \
   82         do { \
   83                 a = ROL(sj, a + Fj(b,c,d) + X(rj) + Kj) + e; \
   84                 c = ROL(10, c); \
   85         } while(0)
   86 
   87 #define X(i)    x[i]
   88 
   89 static u_char PADDING[64] = {
   90         0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
   91         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
   92         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
   93 };
   94 
   95 void
   96 RMD160Init(RMD160_CTX *ctx)
   97 {
   98         ctx->count = 0;
   99         ctx->state[0] = H0;
  100         ctx->state[1] = H1;
  101         ctx->state[2] = H2;
  102         ctx->state[3] = H3;
  103         ctx->state[4] = H4;
  104 }
  105 
  106 void
  107 RMD160Update(RMD160_CTX *ctx, const u_char *input, u_int32_t len)
  108 {
  109         u_int32_t have, off, need;
  110 
  111         have = (ctx->count/8) % 64;
  112         need = 64 - have;
  113         ctx->count += 8 * len;
  114         off = 0;
  115 
  116         if (len >= need) {
  117                 if (have) {
  118                         memcpy(ctx->buffer + have, input, need);
  119                         RMD160Transform(ctx->state, ctx->buffer);
  120                         off = need;
  121                         have = 0;
  122                 }
  123                 /* now the buffer is empty */
  124                 while (off + 64 <= len) {
  125                         RMD160Transform(ctx->state, input+off);
  126                         off += 64;
  127                 }
  128         }
  129         if (off < len)
  130                 memcpy(ctx->buffer + have, input+off, len-off);
  131 }
  132 
  133 void
  134 RMD160Final(u_char digest[20], RMD160_CTX *ctx)
  135 {
  136         int i;
  137         u_char size[8];
  138         u_int32_t padlen;
  139 
  140         PUT_64BIT_LE(size, ctx->count);
  141 
  142         /*
  143          * pad to 64 byte blocks, at least one byte from PADDING plus 8 bytes
  144          * for the size
  145          */
  146         padlen = 64 - ((ctx->count/8) % 64);
  147         if (padlen < 1 + 8)
  148                 padlen += 64;
  149         RMD160Update(ctx, PADDING, padlen - 8);         /* padlen - 8 <= 64 */
  150         RMD160Update(ctx, size, 8);
  151 
  152         if (digest != NULL)
  153                 for (i = 0; i < 5; i++)
  154                         PUT_32BIT_LE(digest + i*4, ctx->state[i]);
  155 
  156         memset(ctx, 0, sizeof (*ctx));
  157 }
  158 
  159 void
  160 RMD160Transform(u_int32_t state[5], const u_char block[64])
  161 {
  162         u_int32_t a, b, c, d, e, aa, bb, cc, dd, ee, t, x[16];
  163 
  164 #if BYTE_ORDER == LITTLE_ENDIAN
  165         memcpy(x, block, 64);
  166 #else
  167         int i;
  168 
  169         for (i = 0; i < 16; i++)
  170                 x[i] = bswap32(*(const u_int32_t*)(block+i*4));
  171 #endif
  172 
  173         a = state[0];
  174         b = state[1];
  175         c = state[2];
  176         d = state[3];
  177         e = state[4];
  178 
  179         /* Round 1 */
  180         R(a, b, c, d, e, F0, K0, 11,  0);
  181         R(e, a, b, c, d, F0, K0, 14,  1);
  182         R(d, e, a, b, c, F0, K0, 15,  2);
  183         R(c, d, e, a, b, F0, K0, 12,  3);
  184         R(b, c, d, e, a, F0, K0,  5,  4);
  185         R(a, b, c, d, e, F0, K0,  8,  5);
  186         R(e, a, b, c, d, F0, K0,  7,  6);
  187         R(d, e, a, b, c, F0, K0,  9,  7);
  188         R(c, d, e, a, b, F0, K0, 11,  8);
  189         R(b, c, d, e, a, F0, K0, 13,  9);
  190         R(a, b, c, d, e, F0, K0, 14, 10);
  191         R(e, a, b, c, d, F0, K0, 15, 11);
  192         R(d, e, a, b, c, F0, K0,  6, 12);
  193         R(c, d, e, a, b, F0, K0,  7, 13);
  194         R(b, c, d, e, a, F0, K0,  9, 14);
  195         R(a, b, c, d, e, F0, K0,  8, 15); /* #15 */
  196         /* Round 2 */
  197         R(e, a, b, c, d, F1, K1,  7,  7);
  198         R(d, e, a, b, c, F1, K1,  6,  4);
  199         R(c, d, e, a, b, F1, K1,  8, 13);
  200         R(b, c, d, e, a, F1, K1, 13,  1);
  201         R(a, b, c, d, e, F1, K1, 11, 10);
  202         R(e, a, b, c, d, F1, K1,  9,  6);
  203         R(d, e, a, b, c, F1, K1,  7, 15);
  204         R(c, d, e, a, b, F1, K1, 15,  3);
  205         R(b, c, d, e, a, F1, K1,  7, 12);
  206         R(a, b, c, d, e, F1, K1, 12,  0);
  207         R(e, a, b, c, d, F1, K1, 15,  9);
  208         R(d, e, a, b, c, F1, K1,  9,  5);
  209         R(c, d, e, a, b, F1, K1, 11,  2);
  210         R(b, c, d, e, a, F1, K1,  7, 14);
  211         R(a, b, c, d, e, F1, K1, 13, 11);
  212         R(e, a, b, c, d, F1, K1, 12,  8); /* #31 */
  213         /* Round 3 */
  214         R(d, e, a, b, c, F2, K2, 11,  3);
  215         R(c, d, e, a, b, F2, K2, 13, 10);
  216         R(b, c, d, e, a, F2, K2,  6, 14);
  217         R(a, b, c, d, e, F2, K2,  7,  4);
  218         R(e, a, b, c, d, F2, K2, 14,  9);
  219         R(d, e, a, b, c, F2, K2,  9, 15);
  220         R(c, d, e, a, b, F2, K2, 13,  8);
  221         R(b, c, d, e, a, F2, K2, 15,  1);
  222         R(a, b, c, d, e, F2, K2, 14,  2);
  223         R(e, a, b, c, d, F2, K2,  8,  7);
  224         R(d, e, a, b, c, F2, K2, 13,  0);
  225         R(c, d, e, a, b, F2, K2,  6,  6);
  226         R(b, c, d, e, a, F2, K2,  5, 13);
  227         R(a, b, c, d, e, F2, K2, 12, 11);
  228         R(e, a, b, c, d, F2, K2,  7,  5);
  229         R(d, e, a, b, c, F2, K2,  5, 12); /* #47 */
  230         /* Round 4 */
  231         R(c, d, e, a, b, F3, K3, 11,  1);
  232         R(b, c, d, e, a, F3, K3, 12,  9);
  233         R(a, b, c, d, e, F3, K3, 14, 11);
  234         R(e, a, b, c, d, F3, K3, 15, 10);
  235         R(d, e, a, b, c, F3, K3, 14,  0);
  236         R(c, d, e, a, b, F3, K3, 15,  8);
  237         R(b, c, d, e, a, F3, K3,  9, 12);
  238         R(a, b, c, d, e, F3, K3,  8,  4);
  239         R(e, a, b, c, d, F3, K3,  9, 13);
  240         R(d, e, a, b, c, F3, K3, 14,  3);
  241         R(c, d, e, a, b, F3, K3,  5,  7);
  242         R(b, c, d, e, a, F3, K3,  6, 15);
  243         R(a, b, c, d, e, F3, K3,  8, 14);
  244         R(e, a, b, c, d, F3, K3,  6,  5);
  245         R(d, e, a, b, c, F3, K3,  5,  6);
  246         R(c, d, e, a, b, F3, K3, 12,  2); /* #63 */
  247         /* Round 5 */
  248         R(b, c, d, e, a, F4, K4,  9,  4);
  249         R(a, b, c, d, e, F4, K4, 15,  0);
  250         R(e, a, b, c, d, F4, K4,  5,  5);
  251         R(d, e, a, b, c, F4, K4, 11,  9);
  252         R(c, d, e, a, b, F4, K4,  6,  7);
  253         R(b, c, d, e, a, F4, K4,  8, 12);
  254         R(a, b, c, d, e, F4, K4, 13,  2);
  255         R(e, a, b, c, d, F4, K4, 12, 10);
  256         R(d, e, a, b, c, F4, K4,  5, 14);
  257         R(c, d, e, a, b, F4, K4, 12,  1);
  258         R(b, c, d, e, a, F4, K4, 13,  3);
  259         R(a, b, c, d, e, F4, K4, 14,  8);
  260         R(e, a, b, c, d, F4, K4, 11, 11);
  261         R(d, e, a, b, c, F4, K4,  8,  6);
  262         R(c, d, e, a, b, F4, K4,  5, 15);
  263         R(b, c, d, e, a, F4, K4,  6, 13); /* #79 */
  264 
  265         aa = a ; bb = b; cc = c; dd = d; ee = e;
  266 
  267         a = state[0];
  268         b = state[1];
  269         c = state[2];
  270         d = state[3];
  271         e = state[4];
  272 
  273         /* Parallel round 1 */
  274         R(a, b, c, d, e, F4, KK0,  8,  5);
  275         R(e, a, b, c, d, F4, KK0,  9, 14);
  276         R(d, e, a, b, c, F4, KK0,  9,  7);
  277         R(c, d, e, a, b, F4, KK0, 11,  0);
  278         R(b, c, d, e, a, F4, KK0, 13,  9);
  279         R(a, b, c, d, e, F4, KK0, 15,  2);
  280         R(e, a, b, c, d, F4, KK0, 15, 11);
  281         R(d, e, a, b, c, F4, KK0,  5,  4);
  282         R(c, d, e, a, b, F4, KK0,  7, 13);
  283         R(b, c, d, e, a, F4, KK0,  7,  6);
  284         R(a, b, c, d, e, F4, KK0,  8, 15);
  285         R(e, a, b, c, d, F4, KK0, 11,  8);
  286         R(d, e, a, b, c, F4, KK0, 14,  1);
  287         R(c, d, e, a, b, F4, KK0, 14, 10);
  288         R(b, c, d, e, a, F4, KK0, 12,  3);
  289         R(a, b, c, d, e, F4, KK0,  6, 12); /* #15 */
  290         /* Parallel round 2 */
  291         R(e, a, b, c, d, F3, KK1,  9,  6);
  292         R(d, e, a, b, c, F3, KK1, 13, 11);
  293         R(c, d, e, a, b, F3, KK1, 15,  3);
  294         R(b, c, d, e, a, F3, KK1,  7,  7);
  295         R(a, b, c, d, e, F3, KK1, 12,  0);
  296         R(e, a, b, c, d, F3, KK1,  8, 13);
  297         R(d, e, a, b, c, F3, KK1,  9,  5);
  298         R(c, d, e, a, b, F3, KK1, 11, 10);
  299         R(b, c, d, e, a, F3, KK1,  7, 14);
  300         R(a, b, c, d, e, F3, KK1,  7, 15);
  301         R(e, a, b, c, d, F3, KK1, 12,  8);
  302         R(d, e, a, b, c, F3, KK1,  7, 12);
  303         R(c, d, e, a, b, F3, KK1,  6,  4);
  304         R(b, c, d, e, a, F3, KK1, 15,  9);
  305         R(a, b, c, d, e, F3, KK1, 13,  1);
  306         R(e, a, b, c, d, F3, KK1, 11,  2); /* #31 */
  307         /* Parallel round 3 */
  308         R(d, e, a, b, c, F2, KK2,  9, 15);
  309         R(c, d, e, a, b, F2, KK2,  7,  5);
  310         R(b, c, d, e, a, F2, KK2, 15,  1);
  311         R(a, b, c, d, e, F2, KK2, 11,  3);
  312         R(e, a, b, c, d, F2, KK2,  8,  7);
  313         R(d, e, a, b, c, F2, KK2,  6, 14);
  314         R(c, d, e, a, b, F2, KK2,  6,  6);
  315         R(b, c, d, e, a, F2, KK2, 14,  9);
  316         R(a, b, c, d, e, F2, KK2, 12, 11);
  317         R(e, a, b, c, d, F2, KK2, 13,  8);
  318         R(d, e, a, b, c, F2, KK2,  5, 12);
  319         R(c, d, e, a, b, F2, KK2, 14,  2);
  320         R(b, c, d, e, a, F2, KK2, 13, 10);
  321         R(a, b, c, d, e, F2, KK2, 13,  0);
  322         R(e, a, b, c, d, F2, KK2,  7,  4);
  323         R(d, e, a, b, c, F2, KK2,  5, 13); /* #47 */
  324         /* Parallel round 4 */
  325         R(c, d, e, a, b, F1, KK3, 15,  8);
  326         R(b, c, d, e, a, F1, KK3,  5,  6);
  327         R(a, b, c, d, e, F1, KK3,  8,  4);
  328         R(e, a, b, c, d, F1, KK3, 11,  1);
  329         R(d, e, a, b, c, F1, KK3, 14,  3);
  330         R(c, d, e, a, b, F1, KK3, 14, 11);
  331         R(b, c, d, e, a, F1, KK3,  6, 15);
  332         R(a, b, c, d, e, F1, KK3, 14,  0);
  333         R(e, a, b, c, d, F1, KK3,  6,  5);
  334         R(d, e, a, b, c, F1, KK3,  9, 12);
  335         R(c, d, e, a, b, F1, KK3, 12,  2);
  336         R(b, c, d, e, a, F1, KK3,  9, 13);
  337         R(a, b, c, d, e, F1, KK3, 12,  9);
  338         R(e, a, b, c, d, F1, KK3,  5,  7);
  339         R(d, e, a, b, c, F1, KK3, 15, 10);
  340         R(c, d, e, a, b, F1, KK3,  8, 14); /* #63 */
  341         /* Parallel round 5 */
  342         R(b, c, d, e, a, F0, KK4,  8, 12);
  343         R(a, b, c, d, e, F0, KK4,  5, 15);
  344         R(e, a, b, c, d, F0, KK4, 12, 10);
  345         R(d, e, a, b, c, F0, KK4,  9,  4);
  346         R(c, d, e, a, b, F0, KK4, 12,  1);
  347         R(b, c, d, e, a, F0, KK4,  5,  5);
  348         R(a, b, c, d, e, F0, KK4, 14,  8);
  349         R(e, a, b, c, d, F0, KK4,  6,  7);
  350         R(d, e, a, b, c, F0, KK4,  8,  6);
  351         R(c, d, e, a, b, F0, KK4, 13,  2);
  352         R(b, c, d, e, a, F0, KK4,  6, 13);
  353         R(a, b, c, d, e, F0, KK4,  5, 14);
  354         R(e, a, b, c, d, F0, KK4, 15,  0);
  355         R(d, e, a, b, c, F0, KK4, 13,  3);
  356         R(c, d, e, a, b, F0, KK4, 11,  9);
  357         R(b, c, d, e, a, F0, KK4, 11, 11); /* #79 */
  358 
  359         t =        state[1] + cc + d;
  360         state[1] = state[2] + dd + e;
  361         state[2] = state[3] + ee + a;
  362         state[3] = state[4] + aa + b;
  363         state[4] = state[0] + bb + c;
  364         state[0] = t;
  365 }

Cache object: 49aabd880edf735cefc0dfa85196eb50


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