md5加密算法C++程序

乐乐天

#include "global.h"
$ F' [6 m$ e0 H/ q; E0 Z& ?6 X#include "md5.h"
, ^ k4 H g# p# I. n5 j' M% C
/* Constants for MD5Transform routine.
*/

1 }7 M2 M$ ?+ v
#define S11 7
#define S12 12
( Z8 C1 F- q6 g' ~5 w#define S13 17
#define S14 22
#define S21 5
#define S22 9
# ?9 d" ~% T0 H" C1 ^#define S23 14
2 Z9 X! F4 ^* @2 [3 D#define S24 20
1 t' L/ A9 E, _/ f#define S31 4
w' O' V+ [6 r# C#define S32 11
3 H) ~* G( z* `3 m/ m#define S33 16
#define S34 23
#define S41 6
z1 h: ~* X" w2 O5 m; e/ @) }% R+ P#define S42 10
#define S43 15
#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
+ r; {6 N X$ _, Z5 ~static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
+ ?3 C$ A! Q, @static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
0 V' `1 @$ q- `# q2 P' E( _, wstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
3 w% D& D ?+ W) r
' a* @, ?, Z* 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
- ]) E2 D) f L( o2 c3 e$ l};
2 {$ P( ~7 \1 M4 ?
/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
7 p9 N. ]4 G9 o% F. D; [2 f: M; q#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
: I2 ~2 f! {) l: }. f {#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

7 j% v e; T+ J3 e5 x/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
7 w' X# 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); \
}
#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); \
}
9 w# ]9 r' _; H6 H4 [2 p#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
: o3 d6 J+ K* I* n5 I0 x4 I6 s) jvoid MD5Init (context)
MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
1 A1 T% q, h, Z: i, T( H*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
4 w! L H& @$ S {& @
* o& C! j# d2 l/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
/ s1 r) d& s7 e/ d7 |void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
8 s B; U* C5 `: zunsigned char *input; /* input block */
( X; n6 n/ Z1 y) A3 Gunsigned int inputLen; /* length of input block */
6 L; X { M7 L! i+ h& g, p{
unsigned int i, index, partLen;
( h( d1 y& G1 m0 B8 W9 w0 u9 _) T5 T% o% Y
/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
4 A. w$ N" L4 A- Y8 R& p
/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

8 h- P6 A4 X3 N* P7 B
' N0 R+ f4 i1 \