md5加密算法C++程序

乐乐天

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

/* Constants for MD5Transform routine.
*/
! W* j2 V% m; A3 ~+ j- n* U" K6 T

#define S11 7
; o" M ?4 i, j& _- u8 H0 e/ f+ |* ]#define S12 12
#define S13 17
#define S14 22
#define S21 5
2 A. c* M# m" z) s) |#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
7 ^1 Y0 E* }. F) e% X& ]#define S41 6
#define S42 10
3 a. l6 {8 u( I: D; c#define S43 15
#define S44 21

1 m g0 Z. B, l& w9 qstatic 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));
1 A, g$ Q, q# K& _' x. a+ t2 lstatic 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
0 }: N9 k; F. _};

/* F, G, H and I are basic MD5 functions.
*/
: C' O& |% Q: x* }3 z# G#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
7 d1 z, C6 M6 X#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
1 k% r1 g; P3 z; v/ |/ H" L4 X#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

. z6 ^" w# V/ a0 S' g' k+ D/* ROTATE_LEFT rotates x left n bits.
*/
! b5 z4 g/ n+ T+ b2 z: s: g v0 t R#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
?$ m. O0 d) @ k* n
/* 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); \
}
" G# c1 k8 j( t+ c#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
8 I: y$ u- P4 U) U" 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); \
}
#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
+ M* C4 l: b( Z; o2 S7 f6 L. J
/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
5 V; R% J8 e. i# AMD5_CTX *context; /* context */
* t9 J. J9 L7 d% e7 B{
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;
}
! o7 }2 R0 x m3 I
G' B& U# F, w& r& I$ x/ Q/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
3 S( ]' N+ @# i! F" s/ @1 s! Bvoid MD5Update (context, input, inputLen)
' w/ @$ o- ?+ G/ }MD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
9 A. m4 l" W8 m' r# o& ?& G \ w{
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