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  • sha256 in C language

    sha256.h


    #ifndef _SHA256_H
    #define _SHA256_H

    #ifndef uint8
    #define uint8 unsigned char
    #endif

    #ifndef uint32
    #define uint32 unsigned long int
    #endif

    typedef struct
    {
    uint32 total[2];
    uint32 state[8];
    uint8 buffer[64];
    }
    sha256_context;

    void sha256_starts( sha256_context *ctx );
    void sha256_update( sha256_context *ctx, uint8 *input, uint32 length );
    void sha256_finish( sha256_context *ctx, uint8 digest[32] );

    #endif /* sha256.h */

    sha256.c

    /*
    * FIPS-180-2 compliant SHA-256 implementation
    *
    * Copyright (C) 2001-2003 Christophe Devine
    *
    * This program is free software; you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation; either version 2 of the License, or
    * (at your option) any later version.
    *
    * This program 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 General Public License for more details.
    *
    * You should have received a copy of the GNU 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 <string.h>

    #include "sha256.h"

    #define GET_UINT32(n,b,i)
    {
    (n) = ( (uint32) (b)[(i) ] << 24 )
    | ( (uint32) (b)[(i) + 1] << 16 )
    | ( (uint32) (b)[(i) + 2] << 8 )
    | ( (uint32) (b)[(i) + 3] );
    }

    #define PUT_UINT32(n,b,i)
    {
    (b)[(i) ] = (uint8) ( (n) >> 24 );
    (b)[(i) + 1] = (uint8) ( (n) >> 16 );
    (b)[(i) + 2] = (uint8) ( (n) >> 8 );
    (b)[(i) + 3] = (uint8) ( (n) );
    }

    void sha256_starts( sha256_context *ctx )
    {
    ctx->total[0] = 0;
    ctx->total[1] = 0;

    ctx->state[0] = 0x6A09E667;
    ctx->state[1] = 0xBB67AE85;
    ctx->state[2] = 0x3C6EF372;
    ctx->state[3] = 0xA54FF53A;
    ctx->state[4] = 0x510E527F;
    ctx->state[5] = 0x9B05688C;
    ctx->state[6] = 0x1F83D9AB;
    ctx->state[7] = 0x5BE0CD19;
    }

    void sha256_process( sha256_context *ctx, uint8 data[64] )
    {
    uint32 temp1, temp2, W[64];
    uint32 A, B, C, D, E, F, G, H;

    GET_UINT32( W[0], data, 0 );
    GET_UINT32( W[1], data, 4 );
    GET_UINT32( W[2], data, 8 );
    GET_UINT32( W[3], data, 12 );
    GET_UINT32( W[4], data, 16 );
    GET_UINT32( W[5], data, 20 );
    GET_UINT32( W[6], data, 24 );
    GET_UINT32( W[7], data, 28 );
    GET_UINT32( W[8], data, 32 );
    GET_UINT32( W[9], data, 36 );
    GET_UINT32( W[10], data, 40 );
    GET_UINT32( W[11], data, 44 );
    GET_UINT32( W[12], data, 48 );
    GET_UINT32( W[13], data, 52 );
    GET_UINT32( W[14], data, 56 );
    GET_UINT32( W[15], data, 60 );

    #define SHR(x,n) ((x & 0xFFFFFFFF) >> n)
    #define ROTR(x,n) (SHR(x,n) | (x << (32 - n)))

    #define S0(x) (ROTR(x, 7) ^ ROTR(x,18) ^ SHR(x, 3))
    #define S1(x) (ROTR(x,17) ^ ROTR(x,19) ^ SHR(x,10))

    #define S2(x) (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))
    #define S3(x) (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))

    #define F0(x,y,z) ((x & y) | (z & (x | y)))
    #define F1(x,y,z) (z ^ (x & (y ^ z)))

    #define R(t)
    (
    W[t] = S1(W[t - 2]) + W[t - 7] +
    S0(W[t - 15]) + W[t - 16]
    )

    #define P(a,b,c,d,e,f,g,h,x,K)
    {
    temp1 = h + S3(e) + F1(e,f,g) + K + x;
    temp2 = S2(a) + F0(a,b,c);
    d += temp1; h = temp1 + temp2;
    }

    A = ctx->state[0];
    B = ctx->state[1];
    C = ctx->state[2];
    D = ctx->state[3];
    E = ctx->state[4];
    F = ctx->state[5];
    G = ctx->state[6];
    H = ctx->state[7];

    P( A, B, C, D, E, F, G, H, W[ 0], 0x428A2F98 );
    P( H, A, B, C, D, E, F, G, W[ 1], 0x71374491 );
    P( G, H, A, B, C, D, E, F, W[ 2], 0xB5C0FBCF );
    P( F, G, H, A, B, C, D, E, W[ 3], 0xE9B5DBA5 );
    P( E, F, G, H, A, B, C, D, W[ 4], 0x3956C25B );
    P( D, E, F, G, H, A, B, C, W[ 5], 0x59F111F1 );
    P( C, D, E, F, G, H, A, B, W[ 6], 0x923F82A4 );
    P( B, C, D, E, F, G, H, A, W[ 7], 0xAB1C5ED5 );
    P( A, B, C, D, E, F, G, H, W[ 8], 0xD807AA98 );
    P( H, A, B, C, D, E, F, G, W[ 9], 0x12835B01 );
    P( G, H, A, B, C, D, E, F, W[10], 0x243185BE );
    P( F, G, H, A, B, C, D, E, W[11], 0x550C7DC3 );
    P( E, F, G, H, A, B, C, D, W[12], 0x72BE5D74 );
    P( D, E, F, G, H, A, B, C, W[13], 0x80DEB1FE );
    P( C, D, E, F, G, H, A, B, W[14], 0x9BDC06A7 );
    P( B, C, D, E, F, G, H, A, W[15], 0xC19BF174 );
    P( A, B, C, D, E, F, G, H, R(16), 0xE49B69C1 );
    P( H, A, B, C, D, E, F, G, R(17), 0xEFBE4786 );
    P( G, H, A, B, C, D, E, F, R(18), 0x0FC19DC6 );
    P( F, G, H, A, B, C, D, E, R(19), 0x240CA1CC );
    P( E, F, G, H, A, B, C, D, R(20), 0x2DE92C6F );
    P( D, E, F, G, H, A, B, C, R(21), 0x4A7484AA );
    P( C, D, E, F, G, H, A, B, R(22), 0x5CB0A9DC );
    P( B, C, D, E, F, G, H, A, R(23), 0x76F988DA );
    P( A, B, C, D, E, F, G, H, R(24), 0x983E5152 );
    P( H, A, B, C, D, E, F, G, R(25), 0xA831C66D );
    P( G, H, A, B, C, D, E, F, R(26), 0xB00327C8 );
    P( F, G, H, A, B, C, D, E, R(27), 0xBF597FC7 );
    P( E, F, G, H, A, B, C, D, R(28), 0xC6E00BF3 );
    P( D, E, F, G, H, A, B, C, R(29), 0xD5A79147 );
    P( C, D, E, F, G, H, A, B, R(30), 0x06CA6351 );
    P( B, C, D, E, F, G, H, A, R(31), 0x14292967 );
    P( A, B, C, D, E, F, G, H, R(32), 0x27B70A85 );
    P( H, A, B, C, D, E, F, G, R(33), 0x2E1B2138 );
    P( G, H, A, B, C, D, E, F, R(34), 0x4D2C6DFC );
    P( F, G, H, A, B, C, D, E, R(35), 0x53380D13 );
    P( E, F, G, H, A, B, C, D, R(36), 0x650A7354 );
    P( D, E, F, G, H, A, B, C, R(37), 0x766A0ABB );
    P( C, D, E, F, G, H, A, B, R(38), 0x81C2C92E );
    P( B, C, D, E, F, G, H, A, R(39), 0x92722C85 );
    P( A, B, C, D, E, F, G, H, R(40), 0xA2BFE8A1 );
    P( H, A, B, C, D, E, F, G, R(41), 0xA81A664B );
    P( G, H, A, B, C, D, E, F, R(42), 0xC24B8B70 );
    P( F, G, H, A, B, C, D, E, R(43), 0xC76C51A3 );
    P( E, F, G, H, A, B, C, D, R(44), 0xD192E819 );
    P( D, E, F, G, H, A, B, C, R(45), 0xD6990624 );
    P( C, D, E, F, G, H, A, B, R(46), 0xF40E3585 );
    P( B, C, D, E, F, G, H, A, R(47), 0x106AA070 );
    P( A, B, C, D, E, F, G, H, R(48), 0x19A4C116 );
    P( H, A, B, C, D, E, F, G, R(49), 0x1E376C08 );
    P( G, H, A, B, C, D, E, F, R(50), 0x2748774C );
    P( F, G, H, A, B, C, D, E, R(51), 0x34B0BCB5 );
    P( E, F, G, H, A, B, C, D, R(52), 0x391C0CB3 );
    P( D, E, F, G, H, A, B, C, R(53), 0x4ED8AA4A );
    P( C, D, E, F, G, H, A, B, R(54), 0x5B9CCA4F );
    P( B, C, D, E, F, G, H, A, R(55), 0x682E6FF3 );
    P( A, B, C, D, E, F, G, H, R(56), 0x748F82EE );
    P( H, A, B, C, D, E, F, G, R(57), 0x78A5636F );
    P( G, H, A, B, C, D, E, F, R(58), 0x84C87814 );
    P( F, G, H, A, B, C, D, E, R(59), 0x8CC70208 );
    P( E, F, G, H, A, B, C, D, R(60), 0x90BEFFFA );
    P( D, E, F, G, H, A, B, C, R(61), 0xA4506CEB );
    P( C, D, E, F, G, H, A, B, R(62), 0xBEF9A3F7 );
    P( B, C, D, E, F, G, H, A, R(63), 0xC67178F2 );

    ctx->state[0] += A;
    ctx->state[1] += B;
    ctx->state[2] += C;
    ctx->state[3] += D;
    ctx->state[4] += E;
    ctx->state[5] += F;
    ctx->state[6] += G;
    ctx->state[7] += H;
    }

    void sha256_update( sha256_context *ctx, uint8 *input, uint32 length )
    {
    uint32 left, fill;

    if( ! length ) return;

    left = ctx->total[0] & 0x3F;
    fill = 64 - left;

    ctx->total[0] += length;
    ctx->total[0] &= 0xFFFFFFFF;

    if( ctx->total[0] < length )
    ctx->total[1]++;

    if( left && length >= fill )
    {
    memcpy( (void *) (ctx->buffer + left),
    (void *) input, fill );
    sha256_process( ctx, ctx->buffer );
    length -= fill;
    input += fill;
    left = 0;
    }

    while( length >= 64 )
    {
    sha256_process( ctx, input );
    length -= 64;
    input += 64;
    }

    if( length )
    {
    memcpy( (void *) (ctx->buffer + left),
    (void *) input, length );
    }
    }

    static uint8 sha256_padding[64] =
    {
    0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
    };

    void sha256_finish( sha256_context *ctx, uint8 digest[32] )
    {
    uint32 last, padn;
    uint32 high, low;
    uint8 msglen[8];

    high = ( ctx->total[0] >> 29 )
    | ( ctx->total[1] << 3 );
    low = ( ctx->total[0] << 3 );

    PUT_UINT32( high, msglen, 0 );
    PUT_UINT32( low, msglen, 4 );

    last = ctx->total[0] & 0x3F;
    padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );

    sha256_update( ctx, sha256_padding, padn );
    sha256_update( ctx, msglen, 8 );

    PUT_UINT32( ctx->state[0], digest, 0 );
    PUT_UINT32( ctx->state[1], digest, 4 );
    PUT_UINT32( ctx->state[2], digest, 8 );
    PUT_UINT32( ctx->state[3], digest, 12 );
    PUT_UINT32( ctx->state[4], digest, 16 );
    PUT_UINT32( ctx->state[5], digest, 20 );
    PUT_UINT32( ctx->state[6], digest, 24 );
    PUT_UINT32( ctx->state[7], digest, 28 );
    }

    #define TEST
    #ifdef TEST

    #include <stdlib.h>
    #include <stdio.h>

    /*
    * those are the standard FIPS-180-2 test vectors
    */

    static char *msg[] =
    {
    "abc",
    "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
    NULL
    };

    static char *val[] =
    {
    "ba7816bf8f01cfea414140de5dae2223"
    "b00361a396177a9cb410ff61f20015ad",
    "248d6a61d20638b8e5c026930c3e6039"
    "a33ce45964ff2167f6ecedd419db06c1",
    "cdc76e5c9914fb9281a1c7e284d73e67"
    "f1809a48a497200e046d39ccc7112cd0"
    };

    int main( int argc, char *argv[] )
    {
    FILE *f;
    int i, j;
    char output[65];
    sha256_context ctx;
    unsigned char buf[1000];
    unsigned char sha256sum[32];

    if( argc < 2 )
    {
    printf( " SHA-256 Validation Tests: " );

    for( i = 0; i < 3; i++ )
    {
    printf( " Test %d ", i + 1 );

    sha256_starts( &ctx );

    if( i < 2 )
    {
    sha256_update( &ctx, (uint8 *) msg[i],
    strlen( msg[i] ) );
    }
    else
    {
    memset( buf, 'a', 1000 );

    for( j = 0; j < 1000; j++ )
    {
    sha256_update( &ctx, (uint8 *) buf, 1000 );
    }
    }

    sha256_finish( &ctx, sha256sum );

    for( j = 0; j < 32; j++ )
    {
    sprintf( output + j * 2, "%02x", sha256sum[j] );
    }

    if( memcmp( output, val[i], 64 ) )
    {
    printf( "failed! " );
    return( 1 );
    }

    printf( "passed. " );
    }

    printf( " " );
    }
    else
    {
    if( ! ( f = fopen( argv[1], "rb" ) ) )
    {
    perror( "fopen" );
    return( 1 );
    }

    sha256_starts( &ctx );

    while( ( i = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
    {
    sha256_update( &ctx, buf, i );
    }

    sha256_finish( &ctx, sha256sum );

    for( j = 0; j < 32; j++ )
    {
    printf( "%02x", sha256sum[j] );
    }

    printf( " %s ", argv[1] );
    }

    return( 0 );
    }

    #endif

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  • 原文地址:https://www.cnblogs.com/lianghong881018/p/10056997.html
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