md5加密算法C++程序

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#include "global.h"
: X" G4 I# K% ]#include "md5.h"

' ~, C( Z$ p! q7 N" E/* Constants for MD5Transform routine.
*/

% r. w% j w# H2 q2 u
- L0 C: L7 Q. M( D2 O5 q4 u6 y#define S11 7
#define S12 12
# Q4 \) n8 ~# }#define S13 17
1 ]1 O- N/ x W7 J#define S14 22
- b# R5 r4 J8 y7 b# X5 ^! ?1 p#define S21 5
#define S22 9
#define S23 14
- [: T& w; |, r$ ` d% |. o#define S24 20
#define S31 4
3 z( @* c8 }2 t |9 f5 m% g0 ?#define S32 11
" z6 _1 p1 {! e5 _0 u; L#define S33 16
* ?! r6 H' {) w#define S34 23
1 U4 g0 ~& W: p' ~#define S41 6
#define S42 10
5 f. c- s1 V9 F- e$ @8 C#define S43 15
#define S44 21

x6 U% {+ U" N+ T0 Dstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
# ~' b3 {0 ?- c: Sstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
/ a/ ~1 E8 J1 k2 s3 o9 [6 dstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

7 D* L& v' m, ?" t4 B8 V7 dstatic 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
};

/* 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)))
: j3 I( e0 S/ m#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

' [ t; {4 @# r4 ?6 _/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
$ ]# a+ r4 ?! F2 W
1 N* }. v$ u4 F. A/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
8 N* `8 |! Z3 ]0 s1 \Rotation 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); \
}
#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); \
}

# ]- Q0 \8 s# ?: a1 i/ M e+ R/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
+ a. B8 H2 v7 t% M) \; dvoid MD5Init (context)
9 A6 d! Q2 G5 E% kMD5_CTX *context; /* context */
8 v) o" X8 D4 ]0 H{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
' D* j7 N X& t- c" l4 L8 \: i7 R*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
- g1 n$ X: S0 E}

( v) x9 G: X1 z/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
+ f. \ M, x6 \6 h$ {( F) zvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
& S L4 c4 s0 z: U) Qunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
$ x% r7 k. E2 L' E{
unsigned int i, index, partLen;
9 L0 k' q5 x4 d3 d' y( R& P
/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
' w0 r! r+ x. i
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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