443 lines
11 KiB
C
443 lines
11 KiB
C
/*
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* FIPS-180-1 compliant SHA-1 implementation
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*
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* Copyright (C) 2003-2006 Christophe Devine
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License, version 2.1 as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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/*
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* The SHA-1 standard was published by NIST in 1993.
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*
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* http://www.itl.nist.gov/fipspubs/fip180-1.htm
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*/
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#ifndef _CRT_SECURE_NO_DEPRECATE
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#define _CRT_SECURE_NO_DEPRECATE 1
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#endif
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#include <string.h>
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#include <stdio.h>
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#include "sha1.h"
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/*
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* 32-bit integer manipulation macros (big endian)
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*/
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#ifndef GET_UINT32_BE
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#define GET_UINT32_BE(n,b,i) \
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{ \
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(n) = ( (ulong) (b)[(i) ] << 24 ) \
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| ( (ulong) (b)[(i) + 1] << 16 ) \
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| ( (ulong) (b)[(i) + 2] << 8 ) \
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| ( (ulong) (b)[(i) + 3] ); \
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}
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#endif
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#ifndef PUT_UINT32_BE
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#define PUT_UINT32_BE(n,b,i) \
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{ \
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(b)[(i) ] = (uchar) ( (n) >> 24 ); \
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(b)[(i) + 1] = (uchar) ( (n) >> 16 ); \
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(b)[(i) + 2] = (uchar) ( (n) >> 8 ); \
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(b)[(i) + 3] = (uchar) ( (n) ); \
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}
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#endif
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/*
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* Core SHA-1 functions
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*/
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void sha1_starts( sha1_context *ctx )
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{
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ctx->total[0] = 0;
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ctx->total[1] = 0;
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ctx->state[0] = 0x67452301;
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ctx->state[1] = 0xEFCDAB89;
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ctx->state[2] = 0x98BADCFE;
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ctx->state[3] = 0x10325476;
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ctx->state[4] = 0xC3D2E1F0;
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}
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void sha1_process( sha1_context *ctx, uchar data[64] )
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{
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ulong temp, W[16], A, B, C, D, E;
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GET_UINT32_BE( W[0], data, 0 );
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GET_UINT32_BE( W[1], data, 4 );
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GET_UINT32_BE( W[2], data, 8 );
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GET_UINT32_BE( W[3], data, 12 );
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GET_UINT32_BE( W[4], data, 16 );
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GET_UINT32_BE( W[5], data, 20 );
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GET_UINT32_BE( W[6], data, 24 );
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GET_UINT32_BE( W[7], data, 28 );
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GET_UINT32_BE( W[8], data, 32 );
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GET_UINT32_BE( W[9], data, 36 );
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GET_UINT32_BE( W[10], data, 40 );
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GET_UINT32_BE( W[11], data, 44 );
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GET_UINT32_BE( W[12], data, 48 );
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GET_UINT32_BE( W[13], data, 52 );
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GET_UINT32_BE( W[14], data, 56 );
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GET_UINT32_BE( W[15], data, 60 );
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#define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
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#define R(t) \
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( \
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temp = W[(t - 3) & 0x0F] ^ W[(t - 8) & 0x0F] ^ \
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W[(t - 14) & 0x0F] ^ W[ t & 0x0F], \
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( W[t & 0x0F] = S(temp,1) ) \
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)
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#define P(a,b,c,d,e,x) \
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{ \
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e += S(a,5) + F(b,c,d) + K + x; b = S(b,30); \
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}
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A = ctx->state[0];
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B = ctx->state[1];
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C = ctx->state[2];
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D = ctx->state[3];
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E = ctx->state[4];
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#define F(x,y,z) (z ^ (x & (y ^ z)))
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#define K 0x5A827999
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P( A, B, C, D, E, W[0] );
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P( E, A, B, C, D, W[1] );
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P( D, E, A, B, C, W[2] );
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P( C, D, E, A, B, W[3] );
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P( B, C, D, E, A, W[4] );
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P( A, B, C, D, E, W[5] );
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P( E, A, B, C, D, W[6] );
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P( D, E, A, B, C, W[7] );
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P( C, D, E, A, B, W[8] );
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P( B, C, D, E, A, W[9] );
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P( A, B, C, D, E, W[10] );
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P( E, A, B, C, D, W[11] );
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P( D, E, A, B, C, W[12] );
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P( C, D, E, A, B, W[13] );
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P( B, C, D, E, A, W[14] );
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P( A, B, C, D, E, W[15] );
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P( E, A, B, C, D, R(16) );
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P( D, E, A, B, C, R(17) );
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P( C, D, E, A, B, R(18) );
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P( B, C, D, E, A, R(19) );
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#undef K
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#undef F
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#define F(x,y,z) (x ^ y ^ z)
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#define K 0x6ED9EBA1
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P( A, B, C, D, E, R(20) );
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P( E, A, B, C, D, R(21) );
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P( D, E, A, B, C, R(22) );
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P( C, D, E, A, B, R(23) );
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P( B, C, D, E, A, R(24) );
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P( A, B, C, D, E, R(25) );
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P( E, A, B, C, D, R(26) );
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P( D, E, A, B, C, R(27) );
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P( C, D, E, A, B, R(28) );
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P( B, C, D, E, A, R(29) );
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P( A, B, C, D, E, R(30) );
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P( E, A, B, C, D, R(31) );
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P( D, E, A, B, C, R(32) );
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P( C, D, E, A, B, R(33) );
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P( B, C, D, E, A, R(34) );
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P( A, B, C, D, E, R(35) );
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P( E, A, B, C, D, R(36) );
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P( D, E, A, B, C, R(37) );
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P( C, D, E, A, B, R(38) );
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P( B, C, D, E, A, R(39) );
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#undef K
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#undef F
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#define F(x,y,z) ((x & y) | (z & (x | y)))
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#define K 0x8F1BBCDC
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P( A, B, C, D, E, R(40) );
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P( E, A, B, C, D, R(41) );
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P( D, E, A, B, C, R(42) );
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P( C, D, E, A, B, R(43) );
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P( B, C, D, E, A, R(44) );
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P( A, B, C, D, E, R(45) );
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P( E, A, B, C, D, R(46) );
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P( D, E, A, B, C, R(47) );
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P( C, D, E, A, B, R(48) );
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P( B, C, D, E, A, R(49) );
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P( A, B, C, D, E, R(50) );
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P( E, A, B, C, D, R(51) );
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P( D, E, A, B, C, R(52) );
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P( C, D, E, A, B, R(53) );
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P( B, C, D, E, A, R(54) );
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P( A, B, C, D, E, R(55) );
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P( E, A, B, C, D, R(56) );
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P( D, E, A, B, C, R(57) );
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P( C, D, E, A, B, R(58) );
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P( B, C, D, E, A, R(59) );
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#undef K
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#undef F
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#define F(x,y,z) (x ^ y ^ z)
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#define K 0xCA62C1D6
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P( A, B, C, D, E, R(60) );
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P( E, A, B, C, D, R(61) );
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P( D, E, A, B, C, R(62) );
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P( C, D, E, A, B, R(63) );
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P( B, C, D, E, A, R(64) );
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P( A, B, C, D, E, R(65) );
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P( E, A, B, C, D, R(66) );
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P( D, E, A, B, C, R(67) );
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P( C, D, E, A, B, R(68) );
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P( B, C, D, E, A, R(69) );
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P( A, B, C, D, E, R(70) );
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P( E, A, B, C, D, R(71) );
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P( D, E, A, B, C, R(72) );
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P( C, D, E, A, B, R(73) );
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P( B, C, D, E, A, R(74) );
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P( A, B, C, D, E, R(75) );
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P( E, A, B, C, D, R(76) );
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P( D, E, A, B, C, R(77) );
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P( C, D, E, A, B, R(78) );
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P( B, C, D, E, A, R(79) );
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#undef K
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#undef F
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ctx->state[0] += A;
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ctx->state[1] += B;
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ctx->state[2] += C;
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ctx->state[3] += D;
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ctx->state[4] += E;
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}
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void sha1_update( sha1_context *ctx, uchar *input, uint length )
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{
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ulong left, fill;
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if( ! length ) return;
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left = ctx->total[0] & 0x3F;
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fill = 64 - left;
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ctx->total[0] += length;
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ctx->total[0] &= 0xFFFFFFFF;
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if( ctx->total[0] < length )
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ctx->total[1]++;
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if( left && length >= fill )
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{
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memcpy( (void *) (ctx->buffer + left),
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(void *) input, fill );
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sha1_process( ctx, ctx->buffer );
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length -= fill;
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input += fill;
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left = 0;
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}
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while( length >= 64 )
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{
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sha1_process( ctx, input );
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length -= 64;
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input += 64;
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}
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if( length )
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{
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memcpy( (void *) (ctx->buffer + left),
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(void *) input, length );
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}
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}
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static uchar sha1_padding[64] =
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{
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0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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void sha1_finish( sha1_context *ctx, uchar digest[20] )
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{
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ulong last, padn;
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ulong high, low;
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uchar msglen[8];
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high = ( ctx->total[0] >> 29 )
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| ( ctx->total[1] << 3 );
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low = ( ctx->total[0] << 3 );
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PUT_UINT32_BE( high, msglen, 0 );
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PUT_UINT32_BE( low, msglen, 4 );
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last = ctx->total[0] & 0x3F;
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padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
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sha1_update( ctx, sha1_padding, padn );
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sha1_update( ctx, msglen, 8 );
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PUT_UINT32_BE( ctx->state[0], digest, 0 );
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PUT_UINT32_BE( ctx->state[1], digest, 4 );
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PUT_UINT32_BE( ctx->state[2], digest, 8 );
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PUT_UINT32_BE( ctx->state[3], digest, 12 );
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PUT_UINT32_BE( ctx->state[4], digest, 16 );
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}
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/*
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* Output SHA-1(file contents), returns 0 if successful.
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*/
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int sha1_file( char *filename, uchar digest[20] )
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{
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FILE *f;
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size_t n;
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sha1_context ctx;
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uchar buf[1024];
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if( ( f = fopen( filename, "rb" ) ) == NULL )
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return( 1 );
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sha1_starts( &ctx );
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while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
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sha1_update( &ctx, buf, (uint) n );
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sha1_finish( &ctx, digest );
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fclose( f );
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return( 0 );
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}
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/*
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* Output SHA-1(buf)
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*/
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void sha1_csum( uchar *buf, uint buflen, uchar digest[20] )
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{
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sha1_context ctx;
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sha1_starts( &ctx );
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sha1_update( &ctx, buf, buflen );
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sha1_finish( &ctx, digest );
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}
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/*
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* Output HMAC-SHA-1(key,buf)
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*/
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void sha1_hmac( uchar *key, uint keylen, uchar *buf, uint buflen,
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uchar digest[20] )
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{
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uint i;
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sha1_context ctx;
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uchar k_ipad[64];
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uchar k_opad[64];
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uchar tmpbuf[20];
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memset( k_ipad, 0x36, 64 );
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memset( k_opad, 0x5C, 64 );
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for( i = 0; i < keylen; i++ )
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{
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if( i >= 64 ) break;
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k_ipad[i] ^= key[i];
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k_opad[i] ^= key[i];
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}
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sha1_starts( &ctx );
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sha1_update( &ctx, k_ipad, 64 );
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sha1_update( &ctx, buf, buflen );
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sha1_finish( &ctx, tmpbuf );
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sha1_starts( &ctx );
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sha1_update( &ctx, k_opad, 64 );
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sha1_update( &ctx, tmpbuf, 20 );
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sha1_finish( &ctx, digest );
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memset( k_ipad, 0, 64 );
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memset( k_opad, 0, 64 );
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memset( tmpbuf, 0, 20 );
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memset( &ctx, 0, sizeof( sha1_context ) );
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}
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#ifdef SELF_TEST
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/*
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* FIPS-180-1 test vectors
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*/
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static char *sha1_test_str[3] =
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{
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"abc",
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"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
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NULL
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};
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static uchar sha1_test_sum[3][20] =
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{
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{ 0xA9, 0x99, 0x3E, 0x36, 0x47, 0x06, 0x81, 0x6A, 0xBA, 0x3E,
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0x25, 0x71, 0x78, 0x50, 0xC2, 0x6C, 0x9C, 0xD0, 0xD8, 0x9D },
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{ 0x84, 0x98, 0x3E, 0x44, 0x1C, 0x3B, 0xD2, 0x6E, 0xBA, 0xAE,
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0x4A, 0xA1, 0xF9, 0x51, 0x29, 0xE5, 0xE5, 0x46, 0x70, 0xF1 },
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{ 0x34, 0xAA, 0x97, 0x3C, 0xD4, 0xC4, 0xDA, 0xA4, 0xF6, 0x1E,
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0xEB, 0x2B, 0xDB, 0xAD, 0x27, 0x31, 0x65, 0x34, 0x01, 0x6F }
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};
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/*
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* Checkup routine
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*/
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int sha1_self_test( void )
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{
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int i, j;
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uchar buf[1000];
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uchar sha1sum[20];
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sha1_context ctx;
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for( i = 0; i < 3; i++ )
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{
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printf( " SHA-1 test #%d: ", i + 1 );
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sha1_starts( &ctx );
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if( i < 2 )
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sha1_update( &ctx, (uchar *) sha1_test_str[i],
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strlen( sha1_test_str[i] ) );
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else
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{
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memset( buf, 'a', 1000 );
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for( j = 0; j < 1000; j++ )
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sha1_update( &ctx, (uchar *) buf, 1000 );
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}
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sha1_finish( &ctx, sha1sum );
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if( memcmp( sha1sum, sha1_test_sum[i], 20 ) != 0 )
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{
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printf( "failed\n" );
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return( 1 );
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}
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printf( "passed\n" );
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}
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printf( "\n" );
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return( 0 );
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}
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#else
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int sha1_self_test( void )
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{
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printf( "SHA-1 self-test not available\n\n" );
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return( 1 );
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}
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#endif
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