The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/crypto/rmd320.c

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    1 /*
    2  * Cryptographic API.
    3  *
    4  * RIPEMD-320 - RACE Integrity Primitives Evaluation Message Digest.
    5  *
    6  * Based on the reference implementation by Antoon Bosselaers, ESAT-COSIC
    7  *
    8  * Copyright (c) 2008 Adrian-Ken Rueegsegger <ken@codelabs.ch>
    9  *
   10  * This program is free software; you can redistribute it and/or modify it
   11  * under the terms of the GNU General Public License as published by the Free
   12  * Software Foundation; either version 2 of the License, or (at your option)
   13  * any later version.
   14  *
   15  */
   16 #include <crypto/internal/hash.h>
   17 #include <linux/init.h>
   18 #include <linux/module.h>
   19 #include <linux/mm.h>
   20 #include <linux/types.h>
   21 #include <asm/byteorder.h>
   22 
   23 #include "ripemd.h"
   24 
   25 struct rmd320_ctx {
   26         u64 byte_count;
   27         u32 state[10];
   28         __le32 buffer[16];
   29 };
   30 
   31 #define K1  RMD_K1
   32 #define K2  RMD_K2
   33 #define K3  RMD_K3
   34 #define K4  RMD_K4
   35 #define K5  RMD_K5
   36 #define KK1 RMD_K6
   37 #define KK2 RMD_K7
   38 #define KK3 RMD_K8
   39 #define KK4 RMD_K9
   40 #define KK5 RMD_K1
   41 
   42 #define F1(x, y, z) (x ^ y ^ z)         /* XOR */
   43 #define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */
   44 #define F3(x, y, z) ((x | ~y) ^ z)
   45 #define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */
   46 #define F5(x, y, z) (x ^ (y | ~z))
   47 
   48 #define ROUND(a, b, c, d, e, f, k, x, s)  { \
   49         (a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \
   50         (a) = rol32((a), (s)) + (e); \
   51         (c) = rol32((c), 10); \
   52 }
   53 
   54 static void rmd320_transform(u32 *state, const __le32 *in)
   55 {
   56         u32 aa, bb, cc, dd, ee, aaa, bbb, ccc, ddd, eee, tmp;
   57 
   58         /* Initialize left lane */
   59         aa = state[0];
   60         bb = state[1];
   61         cc = state[2];
   62         dd = state[3];
   63         ee = state[4];
   64 
   65         /* Initialize right lane */
   66         aaa = state[5];
   67         bbb = state[6];
   68         ccc = state[7];
   69         ddd = state[8];
   70         eee = state[9];
   71 
   72         /* round 1: left lane */
   73         ROUND(aa, bb, cc, dd, ee, F1, K1, in[0],  11);
   74         ROUND(ee, aa, bb, cc, dd, F1, K1, in[1],  14);
   75         ROUND(dd, ee, aa, bb, cc, F1, K1, in[2],  15);
   76         ROUND(cc, dd, ee, aa, bb, F1, K1, in[3],  12);
   77         ROUND(bb, cc, dd, ee, aa, F1, K1, in[4],   5);
   78         ROUND(aa, bb, cc, dd, ee, F1, K1, in[5],   8);
   79         ROUND(ee, aa, bb, cc, dd, F1, K1, in[6],   7);
   80         ROUND(dd, ee, aa, bb, cc, F1, K1, in[7],   9);
   81         ROUND(cc, dd, ee, aa, bb, F1, K1, in[8],  11);
   82         ROUND(bb, cc, dd, ee, aa, F1, K1, in[9],  13);
   83         ROUND(aa, bb, cc, dd, ee, F1, K1, in[10], 14);
   84         ROUND(ee, aa, bb, cc, dd, F1, K1, in[11], 15);
   85         ROUND(dd, ee, aa, bb, cc, F1, K1, in[12],  6);
   86         ROUND(cc, dd, ee, aa, bb, F1, K1, in[13],  7);
   87         ROUND(bb, cc, dd, ee, aa, F1, K1, in[14],  9);
   88         ROUND(aa, bb, cc, dd, ee, F1, K1, in[15],  8);
   89 
   90         /* round 1: right lane */
   91         ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[5],   8);
   92         ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[14],  9);
   93         ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[7],   9);
   94         ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[0],  11);
   95         ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[9],  13);
   96         ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[2],  15);
   97         ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[11], 15);
   98         ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[4],   5);
   99         ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[13],  7);
  100         ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[6],   7);
  101         ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[15],  8);
  102         ROUND(eee, aaa, bbb, ccc, ddd, F5, KK1, in[8],  11);
  103         ROUND(ddd, eee, aaa, bbb, ccc, F5, KK1, in[1],  14);
  104         ROUND(ccc, ddd, eee, aaa, bbb, F5, KK1, in[10], 14);
  105         ROUND(bbb, ccc, ddd, eee, aaa, F5, KK1, in[3],  12);
  106         ROUND(aaa, bbb, ccc, ddd, eee, F5, KK1, in[12],  6);
  107 
  108         /* Swap contents of "a" registers */
  109         tmp = aa; aa = aaa; aaa = tmp;
  110 
  111         /* round 2: left lane" */
  112         ROUND(ee, aa, bb, cc, dd, F2, K2, in[7],   7);
  113         ROUND(dd, ee, aa, bb, cc, F2, K2, in[4],   6);
  114         ROUND(cc, dd, ee, aa, bb, F2, K2, in[13],  8);
  115         ROUND(bb, cc, dd, ee, aa, F2, K2, in[1],  13);
  116         ROUND(aa, bb, cc, dd, ee, F2, K2, in[10], 11);
  117         ROUND(ee, aa, bb, cc, dd, F2, K2, in[6],   9);
  118         ROUND(dd, ee, aa, bb, cc, F2, K2, in[15],  7);
  119         ROUND(cc, dd, ee, aa, bb, F2, K2, in[3],  15);
  120         ROUND(bb, cc, dd, ee, aa, F2, K2, in[12],  7);
  121         ROUND(aa, bb, cc, dd, ee, F2, K2, in[0],  12);
  122         ROUND(ee, aa, bb, cc, dd, F2, K2, in[9],  15);
  123         ROUND(dd, ee, aa, bb, cc, F2, K2, in[5],   9);
  124         ROUND(cc, dd, ee, aa, bb, F2, K2, in[2],  11);
  125         ROUND(bb, cc, dd, ee, aa, F2, K2, in[14],  7);
  126         ROUND(aa, bb, cc, dd, ee, F2, K2, in[11], 13);
  127         ROUND(ee, aa, bb, cc, dd, F2, K2, in[8],  12);
  128 
  129         /* round 2: right lane */
  130         ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[6],   9);
  131         ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[11], 13);
  132         ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[3],  15);
  133         ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[7],   7);
  134         ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[0],  12);
  135         ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[13],  8);
  136         ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[5],   9);
  137         ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[10], 11);
  138         ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[14],  7);
  139         ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[15],  7);
  140         ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[8],  12);
  141         ROUND(ddd, eee, aaa, bbb, ccc, F4, KK2, in[12],  7);
  142         ROUND(ccc, ddd, eee, aaa, bbb, F4, KK2, in[4],   6);
  143         ROUND(bbb, ccc, ddd, eee, aaa, F4, KK2, in[9],  15);
  144         ROUND(aaa, bbb, ccc, ddd, eee, F4, KK2, in[1],  13);
  145         ROUND(eee, aaa, bbb, ccc, ddd, F4, KK2, in[2],  11);
  146 
  147         /* Swap contents of "b" registers */
  148         tmp = bb; bb = bbb; bbb = tmp;
  149 
  150         /* round 3: left lane" */
  151         ROUND(dd, ee, aa, bb, cc, F3, K3, in[3],  11);
  152         ROUND(cc, dd, ee, aa, bb, F3, K3, in[10], 13);
  153         ROUND(bb, cc, dd, ee, aa, F3, K3, in[14],  6);
  154         ROUND(aa, bb, cc, dd, ee, F3, K3, in[4],   7);
  155         ROUND(ee, aa, bb, cc, dd, F3, K3, in[9],  14);
  156         ROUND(dd, ee, aa, bb, cc, F3, K3, in[15],  9);
  157         ROUND(cc, dd, ee, aa, bb, F3, K3, in[8],  13);
  158         ROUND(bb, cc, dd, ee, aa, F3, K3, in[1],  15);
  159         ROUND(aa, bb, cc, dd, ee, F3, K3, in[2],  14);
  160         ROUND(ee, aa, bb, cc, dd, F3, K3, in[7],   8);
  161         ROUND(dd, ee, aa, bb, cc, F3, K3, in[0],  13);
  162         ROUND(cc, dd, ee, aa, bb, F3, K3, in[6],   6);
  163         ROUND(bb, cc, dd, ee, aa, F3, K3, in[13],  5);
  164         ROUND(aa, bb, cc, dd, ee, F3, K3, in[11], 12);
  165         ROUND(ee, aa, bb, cc, dd, F3, K3, in[5],   7);
  166         ROUND(dd, ee, aa, bb, cc, F3, K3, in[12],  5);
  167 
  168         /* round 3: right lane */
  169         ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[15],  9);
  170         ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[5],   7);
  171         ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[1],  15);
  172         ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[3],  11);
  173         ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[7],   8);
  174         ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[14],  6);
  175         ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[6],   6);
  176         ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[9],  14);
  177         ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[11], 12);
  178         ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[8],  13);
  179         ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[12],  5);
  180         ROUND(ccc, ddd, eee, aaa, bbb, F3, KK3, in[2],  14);
  181         ROUND(bbb, ccc, ddd, eee, aaa, F3, KK3, in[10], 13);
  182         ROUND(aaa, bbb, ccc, ddd, eee, F3, KK3, in[0],  13);
  183         ROUND(eee, aaa, bbb, ccc, ddd, F3, KK3, in[4],   7);
  184         ROUND(ddd, eee, aaa, bbb, ccc, F3, KK3, in[13],  5);
  185 
  186         /* Swap contents of "c" registers */
  187         tmp = cc; cc = ccc; ccc = tmp;
  188 
  189         /* round 4: left lane" */
  190         ROUND(cc, dd, ee, aa, bb, F4, K4, in[1],  11);
  191         ROUND(bb, cc, dd, ee, aa, F4, K4, in[9],  12);
  192         ROUND(aa, bb, cc, dd, ee, F4, K4, in[11], 14);
  193         ROUND(ee, aa, bb, cc, dd, F4, K4, in[10], 15);
  194         ROUND(dd, ee, aa, bb, cc, F4, K4, in[0],  14);
  195         ROUND(cc, dd, ee, aa, bb, F4, K4, in[8],  15);
  196         ROUND(bb, cc, dd, ee, aa, F4, K4, in[12],  9);
  197         ROUND(aa, bb, cc, dd, ee, F4, K4, in[4],   8);
  198         ROUND(ee, aa, bb, cc, dd, F4, K4, in[13],  9);
  199         ROUND(dd, ee, aa, bb, cc, F4, K4, in[3],  14);
  200         ROUND(cc, dd, ee, aa, bb, F4, K4, in[7],   5);
  201         ROUND(bb, cc, dd, ee, aa, F4, K4, in[15],  6);
  202         ROUND(aa, bb, cc, dd, ee, F4, K4, in[14],  8);
  203         ROUND(ee, aa, bb, cc, dd, F4, K4, in[5],   6);
  204         ROUND(dd, ee, aa, bb, cc, F4, K4, in[6],   5);
  205         ROUND(cc, dd, ee, aa, bb, F4, K4, in[2],  12);
  206 
  207         /* round 4: right lane */
  208         ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[8],  15);
  209         ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[6],   5);
  210         ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[4],   8);
  211         ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[1],  11);
  212         ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[3],  14);
  213         ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[11], 14);
  214         ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[15],  6);
  215         ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[0],  14);
  216         ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[5],   6);
  217         ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[12],  9);
  218         ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[2],  12);
  219         ROUND(bbb, ccc, ddd, eee, aaa, F2, KK4, in[13],  9);
  220         ROUND(aaa, bbb, ccc, ddd, eee, F2, KK4, in[9],  12);
  221         ROUND(eee, aaa, bbb, ccc, ddd, F2, KK4, in[7],   5);
  222         ROUND(ddd, eee, aaa, bbb, ccc, F2, KK4, in[10], 15);
  223         ROUND(ccc, ddd, eee, aaa, bbb, F2, KK4, in[14],  8);
  224 
  225         /* Swap contents of "d" registers */
  226         tmp = dd; dd = ddd; ddd = tmp;
  227 
  228         /* round 5: left lane" */
  229         ROUND(bb, cc, dd, ee, aa, F5, K5, in[4],   9);
  230         ROUND(aa, bb, cc, dd, ee, F5, K5, in[0],  15);
  231         ROUND(ee, aa, bb, cc, dd, F5, K5, in[5],   5);
  232         ROUND(dd, ee, aa, bb, cc, F5, K5, in[9],  11);
  233         ROUND(cc, dd, ee, aa, bb, F5, K5, in[7],   6);
  234         ROUND(bb, cc, dd, ee, aa, F5, K5, in[12],  8);
  235         ROUND(aa, bb, cc, dd, ee, F5, K5, in[2],  13);
  236         ROUND(ee, aa, bb, cc, dd, F5, K5, in[10], 12);
  237         ROUND(dd, ee, aa, bb, cc, F5, K5, in[14],  5);
  238         ROUND(cc, dd, ee, aa, bb, F5, K5, in[1],  12);
  239         ROUND(bb, cc, dd, ee, aa, F5, K5, in[3],  13);
  240         ROUND(aa, bb, cc, dd, ee, F5, K5, in[8],  14);
  241         ROUND(ee, aa, bb, cc, dd, F5, K5, in[11], 11);
  242         ROUND(dd, ee, aa, bb, cc, F5, K5, in[6],   8);
  243         ROUND(cc, dd, ee, aa, bb, F5, K5, in[15],  5);
  244         ROUND(bb, cc, dd, ee, aa, F5, K5, in[13],  6);
  245 
  246         /* round 5: right lane */
  247         ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[12],  8);
  248         ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[15],  5);
  249         ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[10], 12);
  250         ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[4],   9);
  251         ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[1],  12);
  252         ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[5],   5);
  253         ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[8],  14);
  254         ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[7],   6);
  255         ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[6],   8);
  256         ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[2],  13);
  257         ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[13],  6);
  258         ROUND(aaa, bbb, ccc, ddd, eee, F1, KK5, in[14],  5);
  259         ROUND(eee, aaa, bbb, ccc, ddd, F1, KK5, in[0],  15);
  260         ROUND(ddd, eee, aaa, bbb, ccc, F1, KK5, in[3],  13);
  261         ROUND(ccc, ddd, eee, aaa, bbb, F1, KK5, in[9],  11);
  262         ROUND(bbb, ccc, ddd, eee, aaa, F1, KK5, in[11], 11);
  263 
  264         /* Swap contents of "e" registers */
  265         tmp = ee; ee = eee; eee = tmp;
  266 
  267         /* combine results */
  268         state[0] += aa;
  269         state[1] += bb;
  270         state[2] += cc;
  271         state[3] += dd;
  272         state[4] += ee;
  273         state[5] += aaa;
  274         state[6] += bbb;
  275         state[7] += ccc;
  276         state[8] += ddd;
  277         state[9] += eee;
  278 
  279         return;
  280 }
  281 
  282 static int rmd320_init(struct shash_desc *desc)
  283 {
  284         struct rmd320_ctx *rctx = shash_desc_ctx(desc);
  285 
  286         rctx->byte_count = 0;
  287 
  288         rctx->state[0] = RMD_H0;
  289         rctx->state[1] = RMD_H1;
  290         rctx->state[2] = RMD_H2;
  291         rctx->state[3] = RMD_H3;
  292         rctx->state[4] = RMD_H4;
  293         rctx->state[5] = RMD_H5;
  294         rctx->state[6] = RMD_H6;
  295         rctx->state[7] = RMD_H7;
  296         rctx->state[8] = RMD_H8;
  297         rctx->state[9] = RMD_H9;
  298 
  299         memset(rctx->buffer, 0, sizeof(rctx->buffer));
  300 
  301         return 0;
  302 }
  303 
  304 static int rmd320_update(struct shash_desc *desc, const u8 *data,
  305                          unsigned int len)
  306 {
  307         struct rmd320_ctx *rctx = shash_desc_ctx(desc);
  308         const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
  309 
  310         rctx->byte_count += len;
  311 
  312         /* Enough space in buffer? If so copy and we're done */
  313         if (avail > len) {
  314                 memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
  315                        data, len);
  316                 goto out;
  317         }
  318 
  319         memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
  320                data, avail);
  321 
  322         rmd320_transform(rctx->state, rctx->buffer);
  323         data += avail;
  324         len -= avail;
  325 
  326         while (len >= sizeof(rctx->buffer)) {
  327                 memcpy(rctx->buffer, data, sizeof(rctx->buffer));
  328                 rmd320_transform(rctx->state, rctx->buffer);
  329                 data += sizeof(rctx->buffer);
  330                 len -= sizeof(rctx->buffer);
  331         }
  332 
  333         memcpy(rctx->buffer, data, len);
  334 
  335 out:
  336         return 0;
  337 }
  338 
  339 /* Add padding and return the message digest. */
  340 static int rmd320_final(struct shash_desc *desc, u8 *out)
  341 {
  342         struct rmd320_ctx *rctx = shash_desc_ctx(desc);
  343         u32 i, index, padlen;
  344         __le64 bits;
  345         __le32 *dst = (__le32 *)out;
  346         static const u8 padding[64] = { 0x80, };
  347 
  348         bits = cpu_to_le64(rctx->byte_count << 3);
  349 
  350         /* Pad out to 56 mod 64 */
  351         index = rctx->byte_count & 0x3f;
  352         padlen = (index < 56) ? (56 - index) : ((64+56) - index);
  353         rmd320_update(desc, padding, padlen);
  354 
  355         /* Append length */
  356         rmd320_update(desc, (const u8 *)&bits, sizeof(bits));
  357 
  358         /* Store state in digest */
  359         for (i = 0; i < 10; i++)
  360                 dst[i] = cpu_to_le32p(&rctx->state[i]);
  361 
  362         /* Wipe context */
  363         memset(rctx, 0, sizeof(*rctx));
  364 
  365         return 0;
  366 }
  367 
  368 static struct shash_alg alg = {
  369         .digestsize     =       RMD320_DIGEST_SIZE,
  370         .init           =       rmd320_init,
  371         .update         =       rmd320_update,
  372         .final          =       rmd320_final,
  373         .descsize       =       sizeof(struct rmd320_ctx),
  374         .base           =       {
  375                 .cra_name        =      "rmd320",
  376                 .cra_flags       =      CRYPTO_ALG_TYPE_SHASH,
  377                 .cra_blocksize   =      RMD320_BLOCK_SIZE,
  378                 .cra_module      =      THIS_MODULE,
  379         }
  380 };
  381 
  382 static int __init rmd320_mod_init(void)
  383 {
  384         return crypto_register_shash(&alg);
  385 }
  386 
  387 static void __exit rmd320_mod_fini(void)
  388 {
  389         crypto_unregister_shash(&alg);
  390 }
  391 
  392 module_init(rmd320_mod_init);
  393 module_exit(rmd320_mod_fini);
  394 
  395 MODULE_LICENSE("GPL");
  396 MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
  397 MODULE_DESCRIPTION("RIPEMD-320 Message Digest");

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