md5加密算法C++程序

乐乐天

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

/* Constants for MD5Transform routine.
*/

3 Z; S7 t( M) b* r
#define S11 7
#define S12 12
#define S13 17
3 o$ ~1 R1 e9 | c' t#define S14 22
#define S21 5
9 D1 {, h/ }7 Q$ [#define S22 9
#define S23 14
#define S24 20
3 |- g# x# M; L- m L#define S31 4
. |: A* w. M) F/ A" M' Z1 B+ {#define S32 11
O2 }, E2 }: j/ ~#define S33 16
6 T4 L! d1 J" A! g3 N) h+ }#define S34 23
#define S41 6
6 J! E* {8 B, P$ e! \$ k1 B$ _- ]4 v#define S42 10
( R/ u( {9 O2 f7 @5 I8 q `& `8 z#define S43 15
6 J& J& ~1 C; |( P) Z#define S44 21
P0 y1 ^; u+ C! q0 a8 G h
. G" h: ]( j7 ?5 K) T' ?4 ~static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
7 d( c9 L9 b/ U* _+ ?" X# q; cstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
2 F% d' |0 g4 K, u' ^+ t( Hstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

! K4 J" G7 o) Fstatic 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
};
$ U1 Q9 s7 \+ c' D5 k
; c/ D R6 e6 @, `! m# D, B& l/* 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))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
6 d, W( o) h! Y6 x6 f
/* ROTATE_LEFT rotates x left n bits.
*/
; @* m. W% O( D+ k$ f0 A* a#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

3 T; ~1 R6 y* H( ~/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
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); \
}
* m' P4 ~8 ]# Y" ? |& h#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
: {: P2 W2 A9 A* V) c4 r. O% s7 C#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

3 z' A' i: ~! K5 u! G" U# T2 ~3 s6 x/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
3 g+ ~7 ~" ?: `+ ]3 |' @* xMD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
. \* ], x: q& @9 H% v1 F*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
9 D' M. p( W. Z4 R}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
4 B/ _1 A2 i( x. K# a6 lMD5_CTX *context; /* context */
# U" `; ~# V! W& x6 u$ Z1 ]unsigned char *input; /* input block */
/ f- C o: C8 f* [unsigned int inputLen; /* length of input block */
5 S e- g& d3 `# G A& e{
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

( v4 W+ ?! Q+ ?9 L) L: f: f