md5加密算法C++程序

乐乐天

#include "global.h"
#include "md5.h"
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/ U' m% [* U6 [9 A/* Constants for MD5Transform routine.
*/


#define S11 7
#define S12 12
#define S13 17
#define S14 22
0 b6 B1 O" }4 w$ K" n f#define S21 5
) B( a7 w& M4 }8 V8 W#define S22 9
# V& Q5 ~& y" y3 X* n, T#define S23 14
#define S24 20
* y, \6 u0 o- a1 {* f#define S31 4
#define S32 11
#define S33 16
9 {" |# u5 i4 E#define S34 23
#define S41 6
- q, B. l3 T+ g& @; _#define S42 10
7 P9 G( p, N |/ m" V) C#define S43 15
) S/ X4 V% D2 S#define S44 21
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2 D3 T& P6 }0 n: M5 j3 m4 `6 N+ astatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
7 }9 m6 D8 z5 F# ?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));
! [# T Q! @- e& v2 Z8 lstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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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
};
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! L& Q7 ^3 N% |& T8 v4 r( a1 X/* F, G, H and I are basic MD5 functions.
*/
( h, X( S, h$ M#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
; l1 U) j6 b8 U; \#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
$ |$ q) E5 \, @3 k. ~! @#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

% n! X4 D$ B% e* ?$ b9 ^/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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- A0 M1 j9 e0 B: K; g/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
( T+ y0 K# v, {# Q/ D2 \) kRotation 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); \
}
#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); \
}
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! u; H2 w7 p' s" n' b5 \/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
9 c- v ?2 R+ Q& [) T{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
3 _4 o+ J3 ?( b2 }5 e1 v*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
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0 Z8 z* F2 h. a, E/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
4 `$ O t- s7 `+ h# g; t- I2 Vvoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
) b' v B& `+ | \8 q/ S. M{
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

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