md5加密算法C++程序

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#include "global.h"
9 ~8 w* o* ~# L#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
/ {+ S f S0 a3 Y#define S22 9
$ {. F, b1 O1 }#define S23 14
#define S24 20
#define S31 4
#define S32 11
/ Z' @$ A M* `& y* u#define S33 16
#define S34 23
#define S41 6
0 t& k: H# P& i#define S42 10
- Z) ?, V P% O$ C8 {#define S43 15
#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
0 ?. s2 A* Z" D( gstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

5 ?! U7 M" o6 [' lstatic 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
9 H! L0 V h& d. ?' c};

3 _, {9 Q2 Q4 ]# q" D3 f7 Y/* 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)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
o0 @5 R- n. ^7 q#define I(x, y, z) ((y) ^ ((x) | (~z)))

, q& _% j" ]6 R! l( I/* ROTATE_LEFT rotates x left n bits.
*/
" m/ m0 W5 x3 q4 \#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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9 l% P% r% ]3 ~' _ t' R9 I$ z/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
7 S [. O/ M! n9 n0 _, ERotation 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); \
}
* C' q6 E9 [1 J$ E% N- r: ~* 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); \
}
" P- z: X+ v3 l$ d; G/ s) X, `#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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* S9 K) z: Y: e) o+ b: _' T+ c/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
1 F" v) R# o- J/ L: t- l. k7 eMD5_CTX *context; /* context */
9 v- s5 h; U" Y8 k{
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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# A% u5 {1 A' V" U+ {+ K/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
" T& J- j8 U( n" R5 P. W( R3 xvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
7 c" @$ ]7 |6 \; K6 hunsigned char *input; /* input block */
J6 ~6 w# G& sunsigned int inputLen; /* length of input block */
; u: N1 O5 r/ T! L+ I# x! P' p{
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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