md5加密算法C++程序

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#include "global.h"
#include "md5.h"

0 [3 v+ G/ ?' F: r/* Constants for MD5Transform routine.
*/
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#define S11 7
. v5 \) z5 ?; z#define S12 12
2 k" e+ y* S9 q0 f @% F#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
$ e% p; m( d4 A! x#define S24 20
#define S31 4
#define S32 11
$ F! @6 w" c+ K2 m" j' x#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
! E. X. V4 A/ [7 f( Z5 ystatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
0 r3 Z' Y- X1 i" S; A* hstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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G0 ^7 k+ }! H# X& p4 Pstatic 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
};
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% G9 N# m& V5 {( h/ j/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
4 H' _ P- P7 D' O8 k1 Y6 i#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
1 Y9 T4 }& b5 R) `3 @, C#define H(x, y, z) ((x) ^ (y) ^ (z))
" a8 S1 z( y' x. _& q3 }3 D#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
1 u, ^$ q9 i! u3 \# z# d& }#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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% ^- b1 q0 ]- l6 K( N0 [! D/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
" F1 V9 Z5 l; r5 dRotation is separate from addition to prevent recomputation.
*/
#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
0 p/ n1 ^, m7 n9 L( u0 Q#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); \
}
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7 g0 J0 a1 Z _2 Y) D5 Y) S/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
" g8 `4 U/ C5 B% I- F{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
$ Q0 L% X& a1 i7 g& c- z*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

9 s( L/ U% U; W/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
; F2 C0 C0 F& u7 n- V2 qMD5_CTX *context; /* context */
% X5 n8 ?0 p% M1 i8 cunsigned char *input; /* input block */
2 w5 }+ M* i6 t zunsigned int inputLen; /* length of input block */
~2 D/ i+ `* V0 O) _6 J4 \{
unsigned int i, index, partLen;
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/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);

/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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