md5加密算法C++程序

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#include "global.h"
( ]% {4 P% L) g#include "md5.h"
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/* Constants for MD5Transform routine.
*/
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#define S11 7
#define S12 12
#define S13 17
#define S14 22
' u6 A1 w) B) i; D% a9 N) `#define S21 5
#define S22 9
' D! Z. I; N" m8 F/ z M/ {#define S23 14
- Y, e% f- u+ w#define S24 20
#define S31 4
#define S32 11
#define S33 16
: _/ `0 V' v: ^$ G#define S34 23
# O+ V. S( {" o#define S41 6
, Q0 T/ T/ A9 u( r) B8 g1 c6 L#define S42 10
( r+ I! r' z. j0 k0 B$ v1 w! }2 n. k#define S43 15
# ^* I F. H& I' P1 r1 V- E, m#define S44 21

0 s! ?, \6 B. d$ L I! f$ [static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
6 u7 D5 Q: V9 P, b$ S8 |static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
! \& z& W! c W' n( l" }$ h8 Wstatic 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
};
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' b& i8 O- y1 y; y/* F, G, H and I are basic MD5 functions.
*/
1 [' \7 ]# k) ]' H: A/ A#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
8 `5 q' P& s' e. o+ P#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
: e$ X& n0 G* T/ w#define H(x, y, z) ((x) ^ (y) ^ (z))
) Q4 R; Y/ b: n/ o2 d- s; `0 a#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
2 c, W4 p- t7 X6 k7 |5 ]#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

8 H2 D# v" q4 J$ o; l+ ^1 u4 \/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
% R5 T1 T+ F* X4 O#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
! j! B u$ z& ^ s& m3 ]8 m#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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3 L$ q# X3 C) S/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
5 S% M, b: n* W- R( ]void MD5Init (context)
/ W8 ]* D1 ~5 ~! \, M$ U- M5 `1 xMD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
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context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
( m; u2 }: L2 b' }MD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
{
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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