md5加密算法C++程序

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#include "global.h"
& f* ?1 j5 E T# A# B#include "md5.h"
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& _1 J! l$ }! W/* Constants for MD5Transform routine.
*/
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0 F' H9 I6 N& v& r2 X#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
+ r# r+ u" f: M. A5 ~( H5 C7 O#define S24 20
#define S31 4
#define S32 11
9 q4 t$ v5 P& X1 R0 P#define S33 16
$ k6 W$ G4 k# H7 E. g/ u#define S34 23
#define S41 6
" U# w9 I: j. D#define S42 10
$ t r$ l7 I; i v( I, ?6 ]# ~6 P% n#define S43 15
#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
) l4 c! c* L/ k! p' S+ _7 \: w# Sstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
+ X1 T8 ]% }0 @6 O3 E# r {4 b4 Mstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
I9 J; `4 P& l5 }# u% `8 Tstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
! W- T" ]. e5 Istatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

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
6 c9 x: X" @# ^% A};
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/* F, G, H and I are basic MD5 functions.
*/
. I& ?, ^) x7 ]& |* C/ v6 I4 J#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
0 Q4 J" K2 i" P& Z+ x9 Q0 D#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#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.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

5 `$ M" h+ @- r: Q c$ u7 @/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
: n, j! B2 }1 k3 V; C: b/ U# F+ ORotation is separate from addition to prevent recomputation.
*/
5 f7 g; z( K4 i#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
7 W- U- l8 G% a5 H7 R#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
6 v f/ B5 q H( v4 a5 c# K1 @2 v#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
# n. j1 W- v3 h& s L6 N, J3 h( 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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# x% o1 T) S: z; E" y$ j1 a4 W/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
3 [& X( R4 V9 S/ P9 f( E Bvoid MD5Init (context)
9 s1 b' i, `6 \$ uMD5_CTX *context; /* context */
{
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;
3 S7 ?$ I- Y2 c% S; R! r}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
) L# y9 c, t' p7 T5 dvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
G" D# T: K% X! S{
unsigned int i, index, partLen;

/* 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))
&

guoyun786

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