diff options
Diffstat (limited to 'comm/third_party/libgcrypt/cipher/rmd160.c')
| -rw-r--r-- | comm/third_party/libgcrypt/cipher/rmd160.c | 529 |
1 files changed, 529 insertions, 0 deletions
diff --git a/comm/third_party/libgcrypt/cipher/rmd160.c b/comm/third_party/libgcrypt/cipher/rmd160.c new file mode 100644 index 0000000000..e12ff0176f --- /dev/null +++ b/comm/third_party/libgcrypt/cipher/rmd160.c @@ -0,0 +1,529 @@ +/* rmd160.c - RIPE-MD160 + * Copyright (C) 1998, 2001, 2002, 2003 Free Software Foundation, Inc. + * + * This file is part of Libgcrypt. + * + * Libgcrypt is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * Libgcrypt is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + */ + +#include <config.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "g10lib.h" +#include "hash-common.h" +#include "cipher.h" /* Only used for the rmd160_hash_buffer() prototype. */ + +#include "bithelp.h" +#include "bufhelp.h" + +/********************************* + * RIPEMD-160 is not patented, see (as of 25.10.97) + * http://www.esat.kuleuven.ac.be/~bosselae/ripemd160.html + * Note that the code uses Little Endian byteorder, which is good for + * 386 etc, but we must add some conversion when used on a big endian box. + * + * + * Pseudo-code for RIPEMD-160 + * + * RIPEMD-160 is an iterative hash function that operates on 32-bit words. + * The round function takes as input a 5-word chaining variable and a 16-word + * message block and maps this to a new chaining variable. All operations are + * defined on 32-bit words. Padding is identical to that of MD4. + * + * + * RIPEMD-160: definitions + * + * + * nonlinear functions at bit level: exor, mux, -, mux, - + * + * f(j, x, y, z) = x XOR y XOR z (0 <= j <= 15) + * f(j, x, y, z) = (x AND y) OR (NOT(x) AND z) (16 <= j <= 31) + * f(j, x, y, z) = (x OR NOT(y)) XOR z (32 <= j <= 47) + * f(j, x, y, z) = (x AND z) OR (y AND NOT(z)) (48 <= j <= 63) + * f(j, x, y, z) = x XOR (y OR NOT(z)) (64 <= j <= 79) + * + * + * added constants (hexadecimal) + * + * K(j) = 0x00000000 (0 <= j <= 15) + * K(j) = 0x5A827999 (16 <= j <= 31) int(2**30 x sqrt(2)) + * K(j) = 0x6ED9EBA1 (32 <= j <= 47) int(2**30 x sqrt(3)) + * K(j) = 0x8F1BBCDC (48 <= j <= 63) int(2**30 x sqrt(5)) + * K(j) = 0xA953FD4E (64 <= j <= 79) int(2**30 x sqrt(7)) + * K'(j) = 0x50A28BE6 (0 <= j <= 15) int(2**30 x cbrt(2)) + * K'(j) = 0x5C4DD124 (16 <= j <= 31) int(2**30 x cbrt(3)) + * K'(j) = 0x6D703EF3 (32 <= j <= 47) int(2**30 x cbrt(5)) + * K'(j) = 0x7A6D76E9 (48 <= j <= 63) int(2**30 x cbrt(7)) + * K'(j) = 0x00000000 (64 <= j <= 79) + * + * + * selection of message word + * + * r(j) = j (0 <= j <= 15) + * r(16..31) = 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8 + * r(32..47) = 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12 + * r(48..63) = 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2 + * r(64..79) = 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13 + * r0(0..15) = 5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12 + * r0(16..31)= 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2 + * r0(32..47)= 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13 + * r0(48..63)= 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14 + * r0(64..79)= 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11 + * + * + * amount for rotate left (rol) + * + * s(0..15) = 11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8 + * s(16..31) = 7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12 + * s(32..47) = 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5 + * s(48..63) = 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12 + * s(64..79) = 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6 + * s'(0..15) = 8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6 + * s'(16..31)= 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11 + * s'(32..47)= 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5 + * s'(48..63)= 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8 + * s'(64..79)= 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11 + * + * + * initial value (hexadecimal) + * + * h0 = 0x67452301; h1 = 0xEFCDAB89; h2 = 0x98BADCFE; h3 = 0x10325476; + * h4 = 0xC3D2E1F0; + * + * + * RIPEMD-160: pseudo-code + * + * It is assumed that the message after padding consists of t 16-word blocks + * that will be denoted with X[i][j], with 0 <= i <= t-1 and 0 <= j <= 15. + * The symbol [+] denotes addition modulo 2**32 and rol_s denotes cyclic left + * shift (rotate) over s positions. + * + * + * for i := 0 to t-1 { + * A := h0; B := h1; C := h2; D = h3; E = h4; + * A' := h0; B' := h1; C' := h2; D' = h3; E' = h4; + * for j := 0 to 79 { + * T := rol_s(j)(A [+] f(j, B, C, D) [+] X[i][r(j)] [+] K(j)) [+] E; + * A := E; E := D; D := rol_10(C); C := B; B := T; + * T := rol_s'(j)(A' [+] f(79-j, B', C', D') [+] X[i][r'(j)] + [+] K'(j)) [+] E'; + * A' := E'; E' := D'; D' := rol_10(C'); C' := B'; B' := T; + * } + * T := h1 [+] C [+] D'; h1 := h2 [+] D [+] E'; h2 := h3 [+] E [+] A'; + * h3 := h4 [+] A [+] B'; h4 := h0 [+] B [+] C'; h0 := T; + * } + */ + +/* Some examples: + * "" 9c1185a5c5e9fc54612808977ee8f548b2258d31 + * "a" 0bdc9d2d256b3ee9daae347be6f4dc835a467ffe + * "abc" 8eb208f7e05d987a9b044a8e98c6b087f15a0bfc + * "message digest" 5d0689ef49d2fae572b881b123a85ffa21595f36 + * "a...z" f71c27109c692c1b56bbdceb5b9d2865b3708dbc + * "abcdbcde...nopq" 12a053384a9c0c88e405a06c27dcf49ada62eb2b + * "A...Za...z0...9" b0e20b6e3116640286ed3a87a5713079b21f5189 + * 8 times "1234567890" 9b752e45573d4b39f4dbd3323cab82bf63326bfb + * 1 million times "a" 52783243c1697bdbe16d37f97f68f08325dc1528 + */ + +typedef struct +{ + gcry_md_block_ctx_t bctx; + u32 h0,h1,h2,h3,h4; +} RMD160_CONTEXT; + + +static unsigned int +transform ( void *ctx, const unsigned char *data, size_t nblks ); + +static void +rmd160_init (void *context, unsigned int flags) +{ + RMD160_CONTEXT *hd = context; + + (void)flags; + + hd->h0 = 0x67452301; + hd->h1 = 0xEFCDAB89; + hd->h2 = 0x98BADCFE; + hd->h3 = 0x10325476; + hd->h4 = 0xC3D2E1F0; + + hd->bctx.nblocks = 0; + hd->bctx.nblocks_high = 0; + hd->bctx.count = 0; + hd->bctx.blocksize_shift = _gcry_ctz(64); + hd->bctx.bwrite = transform; +} + + +/**************** + * Transform the message X which consists of 16 32-bit-words + */ +static unsigned int +transform_blk ( void *ctx, const unsigned char *data ) +{ + RMD160_CONTEXT *hd = ctx; + register u32 al, ar, bl, br, cl, cr, dl, dr, el, er; + u32 x[16]; + int i; + + for ( i = 0; i < 16; i++ ) + x[i] = buf_get_le32(data + i * 4); + +#define K0 0x00000000 +#define K1 0x5A827999 +#define K2 0x6ED9EBA1 +#define K3 0x8F1BBCDC +#define K4 0xA953FD4E +#define KK0 0x50A28BE6 +#define KK1 0x5C4DD124 +#define KK2 0x6D703EF3 +#define KK3 0x7A6D76E9 +#define KK4 0x00000000 +#define F0(x,y,z) ( (x) ^ (y) ^ (z) ) +#define F1(x,y,z) ( ((x) & (y)) | (~(x) & (z)) ) +#define F2(x,y,z) ( ((x) | ~(y)) ^ (z) ) +#define F3(x,y,z) ( ((x) & (z)) | ((y) & ~(z)) ) +#define F4(x,y,z) ( (x) ^ ((y) | ~(z)) ) +#define R(a,b,c,d,e,f,k,r,s) do { a += f(b,c,d) + k + x[r]; \ + a = rol(a,s) + e; \ + c = rol(c,10); \ + } while(0) + + /* left lane and right lanes interleaved */ + al = ar = hd->h0; + bl = br = hd->h1; + cl = cr = hd->h2; + dl = dr = hd->h3; + el = er = hd->h4; + R( al, bl, cl, dl, el, F0, K0, 0, 11 ); + R( ar, br, cr, dr, er, F4, KK0, 5, 8); + R( el, al, bl, cl, dl, F0, K0, 1, 14 ); + R( er, ar, br, cr, dr, F4, KK0, 14, 9); + R( dl, el, al, bl, cl, F0, K0, 2, 15 ); + R( dr, er, ar, br, cr, F4, KK0, 7, 9); + R( cl, dl, el, al, bl, F0, K0, 3, 12 ); + R( cr, dr, er, ar, br, F4, KK0, 0, 11); + R( bl, cl, dl, el, al, F0, K0, 4, 5 ); + R( br, cr, dr, er, ar, F4, KK0, 9, 13); + R( al, bl, cl, dl, el, F0, K0, 5, 8 ); + R( ar, br, cr, dr, er, F4, KK0, 2, 15); + R( el, al, bl, cl, dl, F0, K0, 6, 7 ); + R( er, ar, br, cr, dr, F4, KK0, 11, 15); + R( dl, el, al, bl, cl, F0, K0, 7, 9 ); + R( dr, er, ar, br, cr, F4, KK0, 4, 5); + R( cl, dl, el, al, bl, F0, K0, 8, 11 ); + R( cr, dr, er, ar, br, F4, KK0, 13, 7); + R( bl, cl, dl, el, al, F0, K0, 9, 13 ); + R( br, cr, dr, er, ar, F4, KK0, 6, 7); + R( al, bl, cl, dl, el, F0, K0, 10, 14 ); + R( ar, br, cr, dr, er, F4, KK0, 15, 8); + R( el, al, bl, cl, dl, F0, K0, 11, 15 ); + R( er, ar, br, cr, dr, F4, KK0, 8, 11); + R( dl, el, al, bl, cl, F0, K0, 12, 6 ); + R( dr, er, ar, br, cr, F4, KK0, 1, 14); + R( cl, dl, el, al, bl, F0, K0, 13, 7 ); + R( cr, dr, er, ar, br, F4, KK0, 10, 14); + R( bl, cl, dl, el, al, F0, K0, 14, 9 ); + R( br, cr, dr, er, ar, F4, KK0, 3, 12); + R( al, bl, cl, dl, el, F0, K0, 15, 8 ); + R( ar, br, cr, dr, er, F4, KK0, 12, 6); + R( el, al, bl, cl, dl, F1, K1, 7, 7 ); + R( er, ar, br, cr, dr, F3, KK1, 6, 9); + R( dl, el, al, bl, cl, F1, K1, 4, 6 ); + R( dr, er, ar, br, cr, F3, KK1, 11, 13); + R( cl, dl, el, al, bl, F1, K1, 13, 8 ); + R( cr, dr, er, ar, br, F3, KK1, 3, 15); + R( bl, cl, dl, el, al, F1, K1, 1, 13 ); + R( br, cr, dr, er, ar, F3, KK1, 7, 7); + R( al, bl, cl, dl, el, F1, K1, 10, 11 ); + R( ar, br, cr, dr, er, F3, KK1, 0, 12); + R( el, al, bl, cl, dl, F1, K1, 6, 9 ); + R( er, ar, br, cr, dr, F3, KK1, 13, 8); + R( dl, el, al, bl, cl, F1, K1, 15, 7 ); + R( dr, er, ar, br, cr, F3, KK1, 5, 9); + R( cl, dl, el, al, bl, F1, K1, 3, 15 ); + R( cr, dr, er, ar, br, F3, KK1, 10, 11); + R( bl, cl, dl, el, al, F1, K1, 12, 7 ); + R( br, cr, dr, er, ar, F3, KK1, 14, 7); + R( al, bl, cl, dl, el, F1, K1, 0, 12 ); + R( ar, br, cr, dr, er, F3, KK1, 15, 7); + R( el, al, bl, cl, dl, F1, K1, 9, 15 ); + R( er, ar, br, cr, dr, F3, KK1, 8, 12); + R( dl, el, al, bl, cl, F1, K1, 5, 9 ); + R( dr, er, ar, br, cr, F3, KK1, 12, 7); + R( cl, dl, el, al, bl, F1, K1, 2, 11 ); + R( cr, dr, er, ar, br, F3, KK1, 4, 6); + R( bl, cl, dl, el, al, F1, K1, 14, 7 ); + R( br, cr, dr, er, ar, F3, KK1, 9, 15); + R( al, bl, cl, dl, el, F1, K1, 11, 13 ); + R( ar, br, cr, dr, er, F3, KK1, 1, 13); + R( el, al, bl, cl, dl, F1, K1, 8, 12 ); + R( er, ar, br, cr, dr, F3, KK1, 2, 11); + R( dl, el, al, bl, cl, F2, K2, 3, 11 ); + R( dr, er, ar, br, cr, F2, KK2, 15, 9); + R( cl, dl, el, al, bl, F2, K2, 10, 13 ); + R( cr, dr, er, ar, br, F2, KK2, 5, 7); + R( bl, cl, dl, el, al, F2, K2, 14, 6 ); + R( br, cr, dr, er, ar, F2, KK2, 1, 15); + R( al, bl, cl, dl, el, F2, K2, 4, 7 ); + R( ar, br, cr, dr, er, F2, KK2, 3, 11); + R( el, al, bl, cl, dl, F2, K2, 9, 14 ); + R( er, ar, br, cr, dr, F2, KK2, 7, 8); + R( dl, el, al, bl, cl, F2, K2, 15, 9 ); + R( dr, er, ar, br, cr, F2, KK2, 14, 6); + R( cl, dl, el, al, bl, F2, K2, 8, 13 ); + R( cr, dr, er, ar, br, F2, KK2, 6, 6); + R( bl, cl, dl, el, al, F2, K2, 1, 15 ); + R( br, cr, dr, er, ar, F2, KK2, 9, 14); + R( al, bl, cl, dl, el, F2, K2, 2, 14 ); + R( ar, br, cr, dr, er, F2, KK2, 11, 12); + R( el, al, bl, cl, dl, F2, K2, 7, 8 ); + R( er, ar, br, cr, dr, F2, KK2, 8, 13); + R( dl, el, al, bl, cl, F2, K2, 0, 13 ); + R( dr, er, ar, br, cr, F2, KK2, 12, 5); + R( cl, dl, el, al, bl, F2, K2, 6, 6 ); + R( cr, dr, er, ar, br, F2, KK2, 2, 14); + R( bl, cl, dl, el, al, F2, K2, 13, 5 ); + R( br, cr, dr, er, ar, F2, KK2, 10, 13); + R( al, bl, cl, dl, el, F2, K2, 11, 12 ); + R( ar, br, cr, dr, er, F2, KK2, 0, 13); + R( el, al, bl, cl, dl, F2, K2, 5, 7 ); + R( er, ar, br, cr, dr, F2, KK2, 4, 7); + R( dl, el, al, bl, cl, F2, K2, 12, 5 ); + R( dr, er, ar, br, cr, F2, KK2, 13, 5); + R( cl, dl, el, al, bl, F3, K3, 1, 11 ); + R( cr, dr, er, ar, br, F1, KK3, 8, 15); + R( bl, cl, dl, el, al, F3, K3, 9, 12 ); + R( br, cr, dr, er, ar, F1, KK3, 6, 5); + R( al, bl, cl, dl, el, F3, K3, 11, 14 ); + R( ar, br, cr, dr, er, F1, KK3, 4, 8); + R( el, al, bl, cl, dl, F3, K3, 10, 15 ); + R( er, ar, br, cr, dr, F1, KK3, 1, 11); + R( dl, el, al, bl, cl, F3, K3, 0, 14 ); + R( dr, er, ar, br, cr, F1, KK3, 3, 14); + R( cl, dl, el, al, bl, F3, K3, 8, 15 ); + R( cr, dr, er, ar, br, F1, KK3, 11, 14); + R( bl, cl, dl, el, al, F3, K3, 12, 9 ); + R( br, cr, dr, er, ar, F1, KK3, 15, 6); + R( al, bl, cl, dl, el, F3, K3, 4, 8 ); + R( ar, br, cr, dr, er, F1, KK3, 0, 14); + R( el, al, bl, cl, dl, F3, K3, 13, 9 ); + R( er, ar, br, cr, dr, F1, KK3, 5, 6); + R( dl, el, al, bl, cl, F3, K3, 3, 14 ); + R( dr, er, ar, br, cr, F1, KK3, 12, 9); + R( cl, dl, el, al, bl, F3, K3, 7, 5 ); + R( cr, dr, er, ar, br, F1, KK3, 2, 12); + R( bl, cl, dl, el, al, F3, K3, 15, 6 ); + R( br, cr, dr, er, ar, F1, KK3, 13, 9); + R( al, bl, cl, dl, el, F3, K3, 14, 8 ); + R( ar, br, cr, dr, er, F1, KK3, 9, 12); + R( el, al, bl, cl, dl, F3, K3, 5, 6 ); + R( er, ar, br, cr, dr, F1, KK3, 7, 5); + R( dl, el, al, bl, cl, F3, K3, 6, 5 ); + R( dr, er, ar, br, cr, F1, KK3, 10, 15); + R( cl, dl, el, al, bl, F3, K3, 2, 12 ); + R( cr, dr, er, ar, br, F1, KK3, 14, 8); + R( bl, cl, dl, el, al, F4, K4, 4, 9 ); + R( br, cr, dr, er, ar, F0, KK4, 12, 8); + R( al, bl, cl, dl, el, F4, K4, 0, 15 ); + R( ar, br, cr, dr, er, F0, KK4, 15, 5); + R( el, al, bl, cl, dl, F4, K4, 5, 5 ); + R( er, ar, br, cr, dr, F0, KK4, 10, 12); + R( dl, el, al, bl, cl, F4, K4, 9, 11 ); + R( dr, er, ar, br, cr, F0, KK4, 4, 9); + R( cl, dl, el, al, bl, F4, K4, 7, 6 ); + R( cr, dr, er, ar, br, F0, KK4, 1, 12); + R( bl, cl, dl, el, al, F4, K4, 12, 8 ); + R( br, cr, dr, er, ar, F0, KK4, 5, 5); + R( al, bl, cl, dl, el, F4, K4, 2, 13 ); + R( ar, br, cr, dr, er, F0, KK4, 8, 14); + R( el, al, bl, cl, dl, F4, K4, 10, 12 ); + R( er, ar, br, cr, dr, F0, KK4, 7, 6); + R( dl, el, al, bl, cl, F4, K4, 14, 5 ); + R( dr, er, ar, br, cr, F0, KK4, 6, 8); + R( cl, dl, el, al, bl, F4, K4, 1, 12 ); + R( cr, dr, er, ar, br, F0, KK4, 2, 13); + R( bl, cl, dl, el, al, F4, K4, 3, 13 ); + R( br, cr, dr, er, ar, F0, KK4, 13, 6); + R( al, bl, cl, dl, el, F4, K4, 8, 14 ); + R( ar, br, cr, dr, er, F0, KK4, 14, 5); + R( el, al, bl, cl, dl, F4, K4, 11, 11 ); + R( er, ar, br, cr, dr, F0, KK4, 0, 15); + R( dl, el, al, bl, cl, F4, K4, 6, 8 ); + R( dr, er, ar, br, cr, F0, KK4, 3, 13); + R( cl, dl, el, al, bl, F4, K4, 15, 5 ); + R( cr, dr, er, ar, br, F0, KK4, 9, 11); + R( bl, cl, dl, el, al, F4, K4, 13, 6 ); + R( br, cr, dr, er, ar, F0, KK4, 11, 11); + + dr += cl + hd->h1; + hd->h1 = hd->h2 + dl + er; + hd->h2 = hd->h3 + el + ar; + hd->h3 = hd->h4 + al + br; + hd->h4 = hd->h0 + bl + cr; + hd->h0 = dr; + + return /*burn_stack*/ 104+5*sizeof(void*); +} + + +static unsigned int +transform ( void *c, const unsigned char *data, size_t nblks ) +{ + unsigned int burn; + + do + { + burn = transform_blk (c, data); + data += 64; + } + while (--nblks); + + return burn; +} + + +/* + * The routine terminates the computation + */ +static void +rmd160_final( void *context ) +{ + RMD160_CONTEXT *hd = context; + u32 t, th, msb, lsb; + byte *p; + unsigned int burn; + + t = hd->bctx.nblocks; + if (sizeof t == sizeof hd->bctx.nblocks) + th = hd->bctx.nblocks_high; + else + th = hd->bctx.nblocks >> 32; + + /* multiply by 64 to make a byte count */ + lsb = t << 6; + msb = (th << 6) | (t >> 26); + /* add the count */ + t = lsb; + if( (lsb += hd->bctx.count) < t ) + msb++; + /* multiply by 8 to make a bit count */ + t = lsb; + lsb <<= 3; + msb <<= 3; + msb |= t >> 29; + + if (hd->bctx.count < 56) /* enough room */ + { + hd->bctx.buf[hd->bctx.count++] = 0x80; /* pad */ + if (hd->bctx.count < 56) + memset (&hd->bctx.buf[hd->bctx.count], 0, 56 - hd->bctx.count); + + /* append the 64 bit count */ + buf_put_le32(hd->bctx.buf + 56, lsb); + buf_put_le32(hd->bctx.buf + 60, msb); + burn = transform (hd, hd->bctx.buf, 1); + } + else /* need one extra block */ + { + hd->bctx.buf[hd->bctx.count++] = 0x80; /* pad character */ + /* fill pad and next block with zeroes */ + memset (&hd->bctx.buf[hd->bctx.count], 0, 64 - hd->bctx.count + 56); + + /* append the 64 bit count */ + buf_put_le32(hd->bctx.buf + 64 + 56, lsb); + buf_put_le32(hd->bctx.buf + 64 + 60, msb); + burn = transform (hd, hd->bctx.buf, 2); + } + + p = hd->bctx.buf; +#define X(a) do { buf_put_le32(p, hd->h##a); p += 4; } while(0) + X(0); + X(1); + X(2); + X(3); + X(4); +#undef X + + hd->bctx.count = 0; + + _gcry_burn_stack (burn); +} + +static byte * +rmd160_read( void *context ) +{ + RMD160_CONTEXT *hd = context; + + return hd->bctx.buf; +} + + + +/**************** + * Shortcut functions which puts the hash value of the supplied buffer + * into outbuf which must have a size of 20 bytes. + */ +void +_gcry_rmd160_hash_buffer (void *outbuf, const void *buffer, size_t length ) +{ + RMD160_CONTEXT hd; + + rmd160_init (&hd, 0); + _gcry_md_block_write ( &hd, buffer, length ); + rmd160_final ( &hd ); + memcpy ( outbuf, hd.bctx.buf, 20 ); +} + +/* Variant of the above shortcut function using a multiple buffers. */ +static void +_gcry_rmd160_hash_buffers (void *outbuf, const gcry_buffer_t *iov, int iovcnt) +{ + RMD160_CONTEXT hd; + + rmd160_init (&hd, 0); + for (;iovcnt > 0; iov++, iovcnt--) + _gcry_md_block_write (&hd, + (const char*)iov[0].data + iov[0].off, iov[0].len); + rmd160_final ( &hd ); + memcpy ( outbuf, hd.bctx.buf, 20 ); +} + + +static byte asn[15] = /* Object ID is 1.3.36.3.2.1 */ + { 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x24, 0x03, + 0x02, 0x01, 0x05, 0x00, 0x04, 0x14 }; + +static gcry_md_oid_spec_t oid_spec_rmd160[] = + { + /* rsaSignatureWithripemd160 */ + { "1.3.36.3.3.1.2" }, + /* TeleTrust hash algorithm. */ + { "1.3.36.3.2.1" }, + { NULL } + }; + +gcry_md_spec_t _gcry_digest_spec_rmd160 = + { + GCRY_MD_RMD160, {0, 0}, + "RIPEMD160", asn, DIM (asn), oid_spec_rmd160, 20, + rmd160_init, _gcry_md_block_write, rmd160_final, rmd160_read, NULL, + _gcry_rmd160_hash_buffer, _gcry_rmd160_hash_buffers, + sizeof (RMD160_CONTEXT) + }; 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