Sha.cpp
资源名称:GGBT.rar [点击查看]
上传用户:lds876
上传日期:2013-05-25
资源大小:567k
文件大小:7k
源码类别:
P2P编程
开发平台:
Visual C++
- // Sha.cpp: implementation of the CSha class.
- //
- //////////////////////////////////////////////////////////////////////
- #include "stdafx.h"
- #include "Sha.h"
- #include <string.h>
- //#include "sha1.h"
- //////////////////////////////////////////////////////////////////////
- // Construction/Destruction
- //////////////////////////////////////////////////////////////////////
- #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 sha1_starts( struct sha1_context *ctx )
- {
- ctx->total[0] = 0;
- ctx->total[1] = 0;
- ctx->state[0] = 0x67452301;
- ctx->state[1] = 0xEFCDAB89;
- ctx->state[2] = 0x98BADCFE;
- ctx->state[3] = 0x10325476;
- ctx->state[4] = 0xC3D2E1F0;
- }
- void sha1_process( struct sha1_context *ctx, uint8 data[64] )
- {
- uint32 temp, A, B, C, D, E, W[16];
- 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 S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
- #define R(t)
- (
- temp = W[(t - 3) & 0x0F] ^ W[(t - 8) & 0x0F] ^
- W[(t - 14) & 0x0F] ^ W[ t & 0x0F],
- ( W[t & 0x0F] = S(temp,1) )
- )
- #define P(a,b,c,d,e,x)
- {
- e += S(a,5) + F(b,c,d) + K + x; b = S(b,30);
- }
- A = ctx->state[0];
- B = ctx->state[1];
- C = ctx->state[2];
- D = ctx->state[3];
- E = ctx->state[4];
- #define F(x,y,z) (z ^ (x & (y ^ z)))
- #define K 0x5A827999
- P( A, B, C, D, E, W[0] );
- P( E, A, B, C, D, W[1] );
- P( D, E, A, B, C, W[2] );
- P( C, D, E, A, B, W[3] );
- P( B, C, D, E, A, W[4] );
- P( A, B, C, D, E, W[5] );
- P( E, A, B, C, D, W[6] );
- P( D, E, A, B, C, W[7] );
- P( C, D, E, A, B, W[8] );
- P( B, C, D, E, A, W[9] );
- P( A, B, C, D, E, W[10] );
- P( E, A, B, C, D, W[11] );
- P( D, E, A, B, C, W[12] );
- P( C, D, E, A, B, W[13] );
- P( B, C, D, E, A, W[14] );
- P( A, B, C, D, E, W[15] );
- P( E, A, B, C, D, R(16) );
- P( D, E, A, B, C, R(17) );
- P( C, D, E, A, B, R(18) );
- P( B, C, D, E, A, R(19) );
- #undef K
- #undef F
- #define F(x,y,z) (x ^ y ^ z)
- #define K 0x6ED9EBA1
- P( A, B, C, D, E, R(20) );
- P( E, A, B, C, D, R(21) );
- P( D, E, A, B, C, R(22) );
- P( C, D, E, A, B, R(23) );
- P( B, C, D, E, A, R(24) );
- P( A, B, C, D, E, R(25) );
- P( E, A, B, C, D, R(26) );
- P( D, E, A, B, C, R(27) );
- P( C, D, E, A, B, R(28) );
- P( B, C, D, E, A, R(29) );
- P( A, B, C, D, E, R(30) );
- P( E, A, B, C, D, R(31) );
- P( D, E, A, B, C, R(32) );
- P( C, D, E, A, B, R(33) );
- P( B, C, D, E, A, R(34) );
- P( A, B, C, D, E, R(35) );
- P( E, A, B, C, D, R(36) );
- P( D, E, A, B, C, R(37) );
- P( C, D, E, A, B, R(38) );
- P( B, C, D, E, A, R(39) );
- #undef K
- #undef F
- #define F(x,y,z) ((x & y) | (z & (x | y)))
- #define K 0x8F1BBCDC
- P( A, B, C, D, E, R(40) );
- P( E, A, B, C, D, R(41) );
- P( D, E, A, B, C, R(42) );
- P( C, D, E, A, B, R(43) );
- P( B, C, D, E, A, R(44) );
- P( A, B, C, D, E, R(45) );
- P( E, A, B, C, D, R(46) );
- P( D, E, A, B, C, R(47) );
- P( C, D, E, A, B, R(48) );
- P( B, C, D, E, A, R(49) );
- P( A, B, C, D, E, R(50) );
- P( E, A, B, C, D, R(51) );
- P( D, E, A, B, C, R(52) );
- P( C, D, E, A, B, R(53) );
- P( B, C, D, E, A, R(54) );
- P( A, B, C, D, E, R(55) );
- P( E, A, B, C, D, R(56) );
- P( D, E, A, B, C, R(57) );
- P( C, D, E, A, B, R(58) );
- P( B, C, D, E, A, R(59) );
- #undef K
- #undef F
- #define F(x,y,z) (x ^ y ^ z)
- #define K 0xCA62C1D6
- P( A, B, C, D, E, R(60) );
- P( E, A, B, C, D, R(61) );
- P( D, E, A, B, C, R(62) );
- P( C, D, E, A, B, R(63) );
- P( B, C, D, E, A, R(64) );
- P( A, B, C, D, E, R(65) );
- P( E, A, B, C, D, R(66) );
- P( D, E, A, B, C, R(67) );
- P( C, D, E, A, B, R(68) );
- P( B, C, D, E, A, R(69) );
- P( A, B, C, D, E, R(70) );
- P( E, A, B, C, D, R(71) );
- P( D, E, A, B, C, R(72) );
- P( C, D, E, A, B, R(73) );
- P( B, C, D, E, A, R(74) );
- P( A, B, C, D, E, R(75) );
- P( E, A, B, C, D, R(76) );
- P( D, E, A, B, C, R(77) );
- P( C, D, E, A, B, R(78) );
- P( B, C, D, E, A, R(79) );
- #undef K
- #undef F
- ctx->state[0] += A;
- ctx->state[1] += B;
- ctx->state[2] += C;
- ctx->state[3] += D;
- ctx->state[4] += E;
- }
- void sha1_update( struct sha1_context *ctx, uint8 *input, uint32 length )
- {
- uint32 left, fill;
- if( ! length ) return;
- left = ( ctx->total[0] >> 3 ) & 0x3F;
- fill = 64 - left;
- ctx->total[0] += length << 3;
- ctx->total[1] += length >> 29;
- ctx->total[0] &= 0xFFFFFFFF;
- ctx->total[1] += ctx->total[0] < ( length << 3 );
- if( left && length >= fill )
- {
- memcpy( (void *) (ctx->buffer + left), (void *) input, fill );
- sha1_process( ctx, ctx->buffer );
- length -= fill;
- input += fill;
- left = 0;
- }
- while( length >= 64 )
- {
- sha1_process( ctx, input );
- length -= 64;
- input += 64;
- }
- if( length )
- {
- memcpy( (void *) (ctx->buffer + left), (void *) input, length );
- }
- }
- static uint8 sha1_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 sha1_finish( struct sha1_context *ctx, uint8 digest[20] )
- {
- uint32 last, padn;
- uint8 msglen[8];
- PUT_UINT32( ctx->total[1], msglen, 0 );
- PUT_UINT32( ctx->total[0], msglen, 4 );
- last = ( ctx->total[0] >> 3 ) & 0x3F;
- padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
- sha1_update( ctx, sha1_padding, padn );
- sha1_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 );
- }
- void CSHA::start()
- {
- sha1_starts(&m_ctx);
- }
- void CSHA::update(uint8 *input, uint32 length )
- {
- sha1_update(&m_ctx, input, length);
- }
- void CSHA::finish(uint8 digest[])
- {
- sha1_finish(&m_ctx, digest);
- }