md5加密算法C++程序

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

/* Constants for MD5Transform routine.
*/

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/ `+ ?: ?% b3 K6 h+ K#define S11 7
5 @4 G) l: i ]7 i#define S12 12
- }# ~8 v X6 B#define S13 17
#define S14 22
#define S21 5
#define S22 9
. X/ T4 Q/ \' D- r. O& E#define S23 14
#define S24 20
4 ~4 y% `8 r; {1 n#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
' A# G! B" i9 t: \& e#define S42 10
- ^2 t1 N% p4 w: S V& b7 R. y% M#define S43 15
0 p U, G5 ?. `7 @#define S44 21
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" m! y8 M) o2 B. M! Xstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
7 T. w! p8 e( J. B$ v/ C" estatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
6 H" S+ B) P& N- Fstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
, ^ j0 \. S7 N/ B. G7 T3 w0 hstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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+ @$ Q9 E o) L: b- k& Ustatic 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.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
" {- z; G: h3 Q+ `#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
( ?4 {: Z' O T0 Z( i#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
; _6 t- V# q% }#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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& A* r: @% t# {# _/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
: U- J6 N9 b! A7 o2 }Rotation is separate from addition to prevent recomputation.
*/
6 z6 ^% k# K) F! I" C' h#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
+ d# D7 G0 Q9 { Y9 J- Y1 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); \
}
7 d, E6 A8 R) K5 {- x#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
2 o. D: B$ `5 f- R0 N#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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! h* Q* S. _8 q: Z$ m9 e1 S/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
! T; V; G! ?* |2 Y# MMD5_CTX *context; /* context */
: s% }( v$ m' P, |2 E{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
*/
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.
*/
, f4 ]3 m1 E1 w1 u' x. mvoid MD5Update (context, input, inputLen)
& v- I. ]6 g1 KMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned 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);

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

guoyun786

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