md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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' _4 g3 _( W/ t( @- T+ V2 X; B#define S11 7
& \8 Z" s( W+ f, `" S5 d6 u#define S12 12
#define S13 17
: t8 U3 \, o* b7 I1 {/ G. g% A#define S14 22
#define S21 5
#define S22 9
- Y$ s2 }" T3 Y( y: @) F% ?#define S23 14
#define S24 20
#define S31 4
2 R1 s, z" J. k5 _#define S32 11
#define S33 16
5 h7 \0 ~1 G& X" K- i6 H" R! I#define S34 23
#define S41 6
3 u/ P+ ~8 B# c6 x0 J#define S42 10
6 H# y$ g8 Q7 k- I$ G/ E( P' }7 M#define S43 15
( m+ t8 x. ~( \& L2 d7 x t* Y#define S44 21

! N( Q3 ^' s3 G0 ^+ {4 Y3 y- [static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
# [7 S+ e, ]' \1 Ystatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
" L+ {7 r& Q$ E5 d. m; H% Wstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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static unsigned char 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
};

/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
2 W- \& A5 U$ m& n& z#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
B, H- f3 A" h" X( s#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

. ?8 B x5 ?2 c/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
! X$ n4 l7 }. ` b, dRotation is separate from addition to prevent recomputation.
*/
- S. W/ i: n% ]" D9 G. N8 u#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
{8 i$ k# }/ i6 |- {#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
6 ?- {9 Z" d+ R: n#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
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context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

7 }: X1 Y6 }( U5 v: ?# I/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
& i: `" X' T8 M/ i* p# O0 g6 S1 i: rvoid MD5Update (context, input, inputLen)
; }. C( G* x8 ?" i& UMD5_CTX *context; /* context */
unsigned char *input; /* input block */
7 b9 B8 e' a6 B, m6 H6 punsigned int inputLen; /* length of input block */
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unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
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/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

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