md5加密算法C++程序

乐乐天

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

/* Constants for MD5Transform routine.
*/


, X2 A: R9 W' U" Y2 |#define S11 7
#define S12 12
/ k7 M) d+ }2 _2 v \#define S13 17
^' a; W" R. S& j#define S14 22
#define S21 5
#define S22 9
$ A. H* X8 `8 v- G% h#define S23 14
#define S24 20
* N) F: S- a' P8 l* e#define S31 4
4 V% V" S/ M z. G& C& t% I#define S32 11
#define S33 16
" E7 O* K& o" H5 b#define S34 23
% p$ R( V6 e* b$ P. c& q#define S41 6
+ i" ~; g, j9 n3 m. n#define S42 10
#define S43 15
#define S44 21
' w+ v9 P* N3 P1 j8 C# V
static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
7 F0 x1 B) U% ^7 b: Bstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
' f) h- W4 j$ e: l4 Wstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static 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
! S. y: c7 l: S2 a};
; W) X4 q' s- U! z$ m
9 \! Q. L+ J9 ~ f& C: L0 T/* 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))
$ f! K; t* L2 ^ H; Z2 O3 U6 L* e#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
% i( h# J# |7 e
) b5 X# s$ {- H" O. E I) {+ g/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
9 s7 I& {& {- S2 z* `! qRotation is separate from addition to prevent recomputation.
*/
, C: \1 q Z* h6 {% M E, X4 F#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); \
}
$ p6 s% v1 i5 E" O8 E, S2 Z#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

! T5 d5 I8 _+ }( H5 y/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
: Z7 D5 B& ?5 y7 Ovoid MD5Init (context)
MD5_CTX *context; /* context */
) p9 { J2 ?9 p" J( I% w{
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 _/ H/ N" n" C) y) I
: s$ p( R; J- F5 n/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
. E; S) O) l" lunsigned int inputLen; /* length of input block */
5 J: b4 D1 \) g' V. A( o2 P* `7 u$ R{
unsigned int i, index, partLen;
6 y3 j# T& Y2 {; Q# k6 l7 c2 G
/* 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

' i e3 k, ]& D4 a; a