| /* 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 "memory.h" |
| #include "rmd.h" |
| #include "cipher.h" /* Only used for the rmd160_hash_buffer() prototype. */ |
| |
| #include "bithelp.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 |
| */ |
| |
| |
| void |
| _gcry_rmd160_init (void *context) |
| { |
| RMD160_CONTEXT *hd = context; |
| |
| hd->h0 = 0x67452301; |
| hd->h1 = 0xEFCDAB89; |
| hd->h2 = 0x98BADCFE; |
| hd->h3 = 0x10325476; |
| hd->h4 = 0xC3D2E1F0; |
| hd->nblocks = 0; |
| hd->count = 0; |
| } |
| |
| |
| |
| /**************** |
| * Transform the message X which consists of 16 32-bit-words |
| */ |
| static void |
| transform ( RMD160_CONTEXT *hd, const unsigned char *data ) |
| { |
| register u32 a,b,c,d,e; |
| u32 aa,bb,cc,dd,ee,t; |
| #ifdef WORDS_BIGENDIAN |
| u32 x[16]; |
| { |
| int i; |
| byte *p2; |
| const byte *p1; |
| for (i=0, p1=data, p2=(byte*)x; i < 16; i++, p2 += 4 ) |
| { |
| p2[3] = *p1++; |
| p2[2] = *p1++; |
| p2[1] = *p1++; |
| p2[0] = *p1++; |
| } |
| } |
| #else |
| /* This version is better because it is always aligned; |
| * The performance penalty on a 586-100 is about 6% which |
| * is acceptable - because the data is more local it might |
| * also be possible that this is faster on some machines. |
| * This function (when compiled with -02 on gcc 2.7.2) |
| * executes on a 586-100 (39.73 bogomips) at about 1900kb/sec; |
| * [measured with a 4MB data and "gpgm --print-md rmd160"] */ |
| u32 x[16]; |
| memcpy( x, data, 64 ); |
| #endif |
| |
| |
| #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 { t = a + f(b,c,d) + k + x[r]; \ |
| a = rol(t,s) + e; \ |
| c = rol(c,10); \ |
| } while(0) |
| |
| /* left lane */ |
| a = hd->h0; |
| b = hd->h1; |
| c = hd->h2; |
| d = hd->h3; |
| e = hd->h4; |
| R( a, b, c, d, e, F0, K0, 0, 11 ); |
| R( e, a, b, c, d, F0, K0, 1, 14 ); |
| R( d, e, a, b, c, F0, K0, 2, 15 ); |
| R( c, d, e, a, b, F0, K0, 3, 12 ); |
| R( b, c, d, e, a, F0, K0, 4, 5 ); |
| R( a, b, c, d, e, F0, K0, 5, 8 ); |
| R( e, a, b, c, d, F0, K0, 6, 7 ); |
| R( d, e, a, b, c, F0, K0, 7, 9 ); |
| R( c, d, e, a, b, F0, K0, 8, 11 ); |
| R( b, c, d, e, a, F0, K0, 9, 13 ); |
| R( a, b, c, d, e, F0, K0, 10, 14 ); |
| R( e, a, b, c, d, F0, K0, 11, 15 ); |
| R( d, e, a, b, c, F0, K0, 12, 6 ); |
| R( c, d, e, a, b, F0, K0, 13, 7 ); |
| R( b, c, d, e, a, F0, K0, 14, 9 ); |
| R( a, b, c, d, e, F0, K0, 15, 8 ); |
| R( e, a, b, c, d, F1, K1, 7, 7 ); |
| R( d, e, a, b, c, F1, K1, 4, 6 ); |
| R( c, d, e, a, b, F1, K1, 13, 8 ); |
| R( b, c, d, e, a, F1, K1, 1, 13 ); |
| R( a, b, c, d, e, F1, K1, 10, 11 ); |
| R( e, a, b, c, d, F1, K1, 6, 9 ); |
| R( d, e, a, b, c, F1, K1, 15, 7 ); |
| R( c, d, e, a, b, F1, K1, 3, 15 ); |
| R( b, c, d, e, a, F1, K1, 12, 7 ); |
| R( a, b, c, d, e, F1, K1, 0, 12 ); |
| R( e, a, b, c, d, F1, K1, 9, 15 ); |
| R( d, e, a, b, c, F1, K1, 5, 9 ); |
| R( c, d, e, a, b, F1, K1, 2, 11 ); |
| R( b, c, d, e, a, F1, K1, 14, 7 ); |
| R( a, b, c, d, e, F1, K1, 11, 13 ); |
| R( e, a, b, c, d, F1, K1, 8, 12 ); |
| R( d, e, a, b, c, F2, K2, 3, 11 ); |
| R( c, d, e, a, b, F2, K2, 10, 13 ); |
| R( b, c, d, e, a, F2, K2, 14, 6 ); |
| R( a, b, c, d, e, F2, K2, 4, 7 ); |
| R( e, a, b, c, d, F2, K2, 9, 14 ); |
| R( d, e, a, b, c, F2, K2, 15, 9 ); |
| R( c, d, e, a, b, F2, K2, 8, 13 ); |
| R( b, c, d, e, a, F2, K2, 1, 15 ); |
| R( a, b, c, d, e, F2, K2, 2, 14 ); |
| R( e, a, b, c, d, F2, K2, 7, 8 ); |
| R( d, e, a, b, c, F2, K2, 0, 13 ); |
| R( c, d, e, a, b, F2, K2, 6, 6 ); |
| R( b, c, d, e, a, F2, K2, 13, 5 ); |
| R( a, b, c, d, e, F2, K2, 11, 12 ); |
| R( e, a, b, c, d, F2, K2, 5, 7 ); |
| R( d, e, a, b, c, F2, K2, 12, 5 ); |
| R( c, d, e, a, b, F3, K3, 1, 11 ); |
| R( b, c, d, e, a, F3, K3, 9, 12 ); |
| R( a, b, c, d, e, F3, K3, 11, 14 ); |
| R( e, a, b, c, d, F3, K3, 10, 15 ); |
| R( d, e, a, b, c, F3, K3, 0, 14 ); |
| R( c, d, e, a, b, F3, K3, 8, 15 ); |
| R( b, c, d, e, a, F3, K3, 12, 9 ); |
| R( a, b, c, d, e, F3, K3, 4, 8 ); |
| R( e, a, b, c, d, F3, K3, 13, 9 ); |
| R( d, e, a, b, c, F3, K3, 3, 14 ); |
| R( c, d, e, a, b, F3, K3, 7, 5 ); |
| R( b, c, d, e, a, F3, K3, 15, 6 ); |
| R( a, b, c, d, e, F3, K3, 14, 8 ); |
| R( e, a, b, c, d, F3, K3, 5, 6 ); |
| R( d, e, a, b, c, F3, K3, 6, 5 ); |
| R( c, d, e, a, b, F3, K3, 2, 12 ); |
| R( b, c, d, e, a, F4, K4, 4, 9 ); |
| R( a, b, c, d, e, F4, K4, 0, 15 ); |
| R( e, a, b, c, d, F4, K4, 5, 5 ); |
| R( d, e, a, b, c, F4, K4, 9, 11 ); |
| R( c, d, e, a, b, F4, K4, 7, 6 ); |
| R( b, c, d, e, a, F4, K4, 12, 8 ); |
| R( a, b, c, d, e, F4, K4, 2, 13 ); |
| R( e, a, b, c, d, F4, K4, 10, 12 ); |
| R( d, e, a, b, c, F4, K4, 14, 5 ); |
| R( c, d, e, a, b, F4, K4, 1, 12 ); |
| R( b, c, d, e, a, F4, K4, 3, 13 ); |
| R( a, b, c, d, e, F4, K4, 8, 14 ); |
| R( e, a, b, c, d, F4, K4, 11, 11 ); |
| R( d, e, a, b, c, F4, K4, 6, 8 ); |
| R( c, d, e, a, b, F4, K4, 15, 5 ); |
| R( b, c, d, e, a, F4, K4, 13, 6 ); |
| |
| aa = a; bb = b; cc = c; dd = d; ee = e; |
| |
| /* right lane */ |
| a = hd->h0; |
| b = hd->h1; |
| c = hd->h2; |
| d = hd->h3; |
| e = hd->h4; |
| R( a, b, c, d, e, F4, KK0, 5, 8); |
| R( e, a, b, c, d, F4, KK0, 14, 9); |
| R( d, e, a, b, c, F4, KK0, 7, 9); |
| R( c, d, e, a, b, F4, KK0, 0, 11); |
| R( b, c, d, e, a, F4, KK0, 9, 13); |
| R( a, b, c, d, e, F4, KK0, 2, 15); |
| R( e, a, b, c, d, F4, KK0, 11, 15); |
| R( d, e, a, b, c, F4, KK0, 4, 5); |
| R( c, d, e, a, b, F4, KK0, 13, 7); |
| R( b, c, d, e, a, F4, KK0, 6, 7); |
| R( a, b, c, d, e, F4, KK0, 15, 8); |
| R( e, a, b, c, d, F4, KK0, 8, 11); |
| R( d, e, a, b, c, F4, KK0, 1, 14); |
| R( c, d, e, a, b, F4, KK0, 10, 14); |
| R( b, c, d, e, a, F4, KK0, 3, 12); |
| R( a, b, c, d, e, F4, KK0, 12, 6); |
| R( e, a, b, c, d, F3, KK1, 6, 9); |
| R( d, e, a, b, c, F3, KK1, 11, 13); |
| R( c, d, e, a, b, F3, KK1, 3, 15); |
| R( b, c, d, e, a, F3, KK1, 7, 7); |
| R( a, b, c, d, e, F3, KK1, 0, 12); |
| R( e, a, b, c, d, F3, KK1, 13, 8); |
| R( d, e, a, b, c, F3, KK1, 5, 9); |
| R( c, d, e, a, b, F3, KK1, 10, 11); |
| R( b, c, d, e, a, F3, KK1, 14, 7); |
| R( a, b, c, d, e, F3, KK1, 15, 7); |
| R( e, a, b, c, d, F3, KK1, 8, 12); |
| R( d, e, a, b, c, F3, KK1, 12, 7); |
| R( c, d, e, a, b, F3, KK1, 4, 6); |
| R( b, c, d, e, a, F3, KK1, 9, 15); |
| R( a, b, c, d, e, F3, KK1, 1, 13); |
| R( e, a, b, c, d, F3, KK1, 2, 11); |
| R( d, e, a, b, c, F2, KK2, 15, 9); |
| R( c, d, e, a, b, F2, KK2, 5, 7); |
| R( b, c, d, e, a, F2, KK2, 1, 15); |
| R( a, b, c, d, e, F2, KK2, 3, 11); |
| R( e, a, b, c, d, F2, KK2, 7, 8); |
| R( d, e, a, b, c, F2, KK2, 14, 6); |
| R( c, d, e, a, b, F2, KK2, 6, 6); |
| R( b, c, d, e, a, F2, KK2, 9, 14); |
| R( a, b, c, d, e, F2, KK2, 11, 12); |
| R( e, a, b, c, d, F2, KK2, 8, 13); |
| R( d, e, a, b, c, F2, KK2, 12, 5); |
| R( c, d, e, a, b, F2, KK2, 2, 14); |
| R( b, c, d, e, a, F2, KK2, 10, 13); |
| R( a, b, c, d, e, F2, KK2, 0, 13); |
| R( e, a, b, c, d, F2, KK2, 4, 7); |
| R( d, e, a, b, c, F2, KK2, 13, 5); |
| R( c, d, e, a, b, F1, KK3, 8, 15); |
| R( b, c, d, e, a, F1, KK3, 6, 5); |
| R( a, b, c, d, e, F1, KK3, 4, 8); |
| R( e, a, b, c, d, F1, KK3, 1, 11); |
| R( d, e, a, b, c, F1, KK3, 3, 14); |
| R( c, d, e, a, b, F1, KK3, 11, 14); |
| R( b, c, d, e, a, F1, KK3, 15, 6); |
| R( a, b, c, d, e, F1, KK3, 0, 14); |
| R( e, a, b, c, d, F1, KK3, 5, 6); |
| R( d, e, a, b, c, F1, KK3, 12, 9); |
| R( c, d, e, a, b, F1, KK3, 2, 12); |
| R( b, c, d, e, a, F1, KK3, 13, 9); |
| R( a, b, c, d, e, F1, KK3, 9, 12); |
| R( e, a, b, c, d, F1, KK3, 7, 5); |
| R( d, e, a, b, c, F1, KK3, 10, 15); |
| R( c, d, e, a, b, F1, KK3, 14, 8); |
| R( b, c, d, e, a, F0, KK4, 12, 8); |
| R( a, b, c, d, e, F0, KK4, 15, 5); |
| R( e, a, b, c, d, F0, KK4, 10, 12); |
| R( d, e, a, b, c, F0, KK4, 4, 9); |
| R( c, d, e, a, b, F0, KK4, 1, 12); |
| R( b, c, d, e, a, F0, KK4, 5, 5); |
| R( a, b, c, d, e, F0, KK4, 8, 14); |
| R( e, a, b, c, d, F0, KK4, 7, 6); |
| R( d, e, a, b, c, F0, KK4, 6, 8); |
| R( c, d, e, a, b, F0, KK4, 2, 13); |
| R( b, c, d, e, a, F0, KK4, 13, 6); |
| R( a, b, c, d, e, F0, KK4, 14, 5); |
| R( e, a, b, c, d, F0, KK4, 0, 15); |
| R( d, e, a, b, c, F0, KK4, 3, 13); |
| R( c, d, e, a, b, F0, KK4, 9, 11); |
| R( b, c, d, e, a, F0, KK4, 11, 11); |
| |
| |
| t = hd->h1 + d + cc; |
| hd->h1 = hd->h2 + e + dd; |
| hd->h2 = hd->h3 + a + ee; |
| hd->h3 = hd->h4 + b + aa; |
| hd->h4 = hd->h0 + c + bb; |
| hd->h0 = t; |
| } |
| |
| |
| /* Update the message digest with the contents |
| * of INBUF with length INLEN. |
| */ |
| static void |
| rmd160_write ( void *context, const void *inbuf_arg, size_t inlen) |
| { |
| const unsigned char *inbuf = inbuf_arg; |
| RMD160_CONTEXT *hd = context; |
| |
| if( hd->count == 64 ) /* flush the buffer */ |
| { |
| transform( hd, hd->buf ); |
| _gcry_burn_stack (108+5*sizeof(void*)); |
| hd->count = 0; |
| hd->nblocks++; |
| } |
| if( !inbuf ) |
| return; |
| if( hd->count ) |
| { |
| for( ; inlen && hd->count < 64; inlen-- ) |
| hd->buf[hd->count++] = *inbuf++; |
| rmd160_write( hd, NULL, 0 ); |
| if( !inlen ) |
| return; |
| } |
| |
| while( inlen >= 64 ) |
| { |
| transform( hd, inbuf ); |
| hd->count = 0; |
| hd->nblocks++; |
| inlen -= 64; |
| inbuf += 64; |
| } |
| _gcry_burn_stack (108+5*sizeof(void*)); |
| for( ; inlen && hd->count < 64; inlen-- ) |
| hd->buf[hd->count++] = *inbuf++; |
| } |
| |
| /**************** |
| * Apply the rmd160 transform function on the buffer which must have |
| * a length 64 bytes. Do not use this function together with the |
| * other functions, use rmd160_init to initialize internal variables. |
| * Returns: 16 bytes in buffer with the mixed contentes of buffer. |
| */ |
| void |
| _gcry_rmd160_mixblock ( RMD160_CONTEXT *hd, void *blockof64byte ) |
| { |
| char *p = blockof64byte; |
| |
| transform ( hd, blockof64byte ); |
| #define X(a) do { *(u32*)p = hd->h##a ; p += 4; } while(0) |
| X(0); |
| X(1); |
| X(2); |
| X(3); |
| X(4); |
| #undef X |
| } |
| |
| |
| /* The routine terminates the computation |
| */ |
| |
| static void |
| rmd160_final( void *context ) |
| { |
| RMD160_CONTEXT *hd = context; |
| u32 t, msb, lsb; |
| byte *p; |
| |
| rmd160_write(hd, NULL, 0); /* flush */; |
| |
| t = hd->nblocks; |
| /* multiply by 64 to make a byte count */ |
| lsb = t << 6; |
| msb = t >> 26; |
| /* add the count */ |
| t = lsb; |
| if( (lsb += hd->count) < t ) |
| msb++; |
| /* multiply by 8 to make a bit count */ |
| t = lsb; |
| lsb <<= 3; |
| msb <<= 3; |
| msb |= t >> 29; |
| |
| if( hd->count < 56 ) /* enough room */ |
| { |
| hd->buf[hd->count++] = 0x80; /* pad */ |
| while( hd->count < 56 ) |
| hd->buf[hd->count++] = 0; /* pad */ |
| } |
| else /* need one extra block */ |
| { |
| hd->buf[hd->count++] = 0x80; /* pad character */ |
| while( hd->count < 64 ) |
| hd->buf[hd->count++] = 0; |
| rmd160_write(hd, NULL, 0); /* flush */; |
| memset(hd->buf, 0, 56 ); /* fill next block with zeroes */ |
| } |
| /* append the 64 bit count */ |
| hd->buf[56] = lsb ; |
| hd->buf[57] = lsb >> 8; |
| hd->buf[58] = lsb >> 16; |
| hd->buf[59] = lsb >> 24; |
| hd->buf[60] = msb ; |
| hd->buf[61] = msb >> 8; |
| hd->buf[62] = msb >> 16; |
| hd->buf[63] = msb >> 24; |
| transform( hd, hd->buf ); |
| _gcry_burn_stack (108+5*sizeof(void*)); |
| |
| p = hd->buf; |
| #ifdef WORDS_BIGENDIAN |
| #define X(a) do { *p++ = hd->h##a ; *p++ = hd->h##a >> 8; \ |
| *p++ = hd->h##a >> 16; *p++ = hd->h##a >> 24; } while(0) |
| #else /* little endian */ |
| #define X(a) do { *(u32*)p = hd->h##a ; p += 4; } while(0) |
| #endif |
| X(0); |
| X(1); |
| X(2); |
| X(3); |
| X(4); |
| #undef X |
| } |
| |
| static byte * |
| rmd160_read( void *context ) |
| { |
| RMD160_CONTEXT *hd = context; |
| |
| return hd->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; |
| |
| _gcry_rmd160_init ( &hd ); |
| rmd160_write ( &hd, buffer, length ); |
| rmd160_final ( &hd ); |
| memcpy ( outbuf, hd.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 = |
| { |
| "RIPEMD160", asn, DIM (asn), oid_spec_rmd160, 20, |
| _gcry_rmd160_init, rmd160_write, rmd160_final, rmd160_read, |
| sizeof (RMD160_CONTEXT) |
| }; |