md5加密算法C++程序

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#include "global.h"
7 e1 }& p/ C1 n+ y#include "md5.h"
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7 R/ y! f) r+ U* p/* Constants for MD5Transform routine.
*/
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#define S11 7
6 k5 {2 h+ |+ f7 y#define S12 12
& C$ c: N. R% u3 ]! s9 ]#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
, u9 V. G2 x% f% {5 G0 Z#define S24 20
) U0 Y$ m% N% \/ ~3 l) w" v, A#define S31 4
#define S32 11
#define S33 16
" ?7 j4 ]7 E3 d7 m# A#define S34 23
" y) \. ~3 F# F' P% ~8 O#define S41 6
8 `! c& K5 V% F6 s4 ]5 q% j' e#define S42 10
#define S43 15
6 j& f& W: r+ X$ R1 l2 S: }" x6 @#define S44 21
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" W' X& ^2 S: R5 v, sstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
2 V P! P; i6 v( u* Ystatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
* ^+ w: C6 s2 f7 @6 m' Q: Hstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

( S7 l/ L- f8 F! G! i7 U& Q: Vstatic 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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/* F, G, H and I are basic MD5 functions.
*/
" A% Q% m! @. s& J3 ~) ~#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
2 }' L+ m! s5 \- v9 K h#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
$ Y. f! G/ _% W#define H(x, y, z) ((x) ^ (y) ^ (z))
. B9 @" J8 I- P#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
6 g- F9 m) y2 m% b7 S% ?' F* Q; @( r#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

. {0 H- r( Y" W3 X7 S2 w5 X8 i& c/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
* \) O8 t' I- P# iRotation is separate from addition to prevent recomputation.
*/
' n# l* b& U2 B0 X6 h7 q3 H: Q#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
# U* Y/ v5 a8 l! U#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#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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/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
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context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
! O0 G2 R! S7 Z" B. u*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
) c* Z* j2 c3 e% K}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
7 L/ ^3 P D+ q- c7 ~6 L+ Zvoid MD5Update (context, input, inputLen)
$ S. z( p4 H" i: `8 rMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
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unsigned int i, index, partLen;
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/* 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))
&

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