md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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0 c5 S) z( s8 X, D& y" x6 d! }/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
#define S13 17
#define S14 22
, z5 g: p: B9 m z: S0 J#define S21 5
#define S22 9
; _* a+ {3 R( b3 e, M+ |0 ~% @& S#define S23 14
1 w4 B5 m2 }7 z+ g p7 c$ S#define S24 20
; I9 O, k' h8 p( @#define S31 4
1 P- m3 ~# r }$ S#define S32 11
/ L7 H1 c9 H4 Z9 N8 e( y4 d#define S33 16
+ w% }; m' v- d" Z0 F# A#define S34 23
#define S41 6
7 c: i! I% V8 |#define S42 10
- h* }0 c+ a r7 r/ X#define S43 15
#define S44 21
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5 j9 {8 M2 |( h% R3 Nstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
, u4 G4 t9 ?! ystatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
) X9 |4 F: O. S- T7 Z& e+ y: cstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
6 ^& ]. s2 r) `; I/ _+ Wstatic 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
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" P( P7 P% ~+ E' b3 D0 F3 p+ N/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
2 e) [( z4 `: s2 J* r#define H(x, y, z) ((x) ^ (y) ^ (z))
, h. H. I' F% A2 Z# e) m#define I(x, y, z) ((y) ^ ((x) | (~z)))

' U& O9 {3 J# {7 L0 v+ {- |/* ROTATE_LEFT rotates x left n bits.
*/
* \# d/ W. f x. G3 {#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
# T! j. o2 `$ `: b% X4 MRotation 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); \
}
; ?& z% _- u& A' D5 d#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
, }" o. }2 A; j" b6 Q0 @' Q8 D#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
" @' ~: S# r- \6 Z1 K#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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: `' I+ L* o% [+ G5 i: A7 ]/ E! d/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
4 z Q/ P: |% }$ z$ ZMD5_CTX *context; /* context */
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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;
}
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
; _; e* k n. {$ WMD5_CTX *context; /* context */
" }6 f( }6 e* W2 Nunsigned char *input; /* input block */
/ h7 N4 u8 g$ T9 [$ Tunsigned int inputLen; /* length of input block */
{
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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