md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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/* Constants for MD5Transform routine.
*/

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#define S11 7
9 j/ W$ b" Y" P#define S12 12
#define S13 17
9 l6 j w( W8 H) D/ o) ]#define S14 22
#define S21 5
#define S22 9
. v* R3 T2 l* m9 k) R- J#define S23 14
" ~* O8 c# R, P% N#define S24 20
#define S31 4
6 V. U/ t$ j C! e- n#define S32 11
- _: h$ o6 N1 ?" V: g1 C#define S33 16
#define S34 23
#define S41 6
& k( T4 d+ E1 f6 ]1 e#define S42 10
G4 P" V* r, t+ s# u/ y% Z#define S43 15
& W, h8 b6 Q' X5 `; v#define S44 21

6 f% `! k( X7 W( @$ J: ustatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
, e5 ^1 t% a; B7 \( qstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
* s3 z! l' R& |4 `static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static 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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/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
0 V# r& b2 ^9 ?- y1 } I#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
% o- O' T; ^7 |# \+ t#define H(x, y, z) ((x) ^ (y) ^ (z))
' R# a; B0 H8 h+ d#define I(x, y, z) ((y) ^ ((x) | (~z)))
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/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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3 N3 [7 ^6 F3 G% c/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
/ ]$ s" m# C5 h+ j8 s: [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); \
}
$ J- h" l q! b9 z#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
P2 y- d' }1 J! X( t* p8 D#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
; S* P& L; x& t J#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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/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
- I9 F m% H) }& u8 y( e9 hMD5_CTX *context; /* context */
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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;
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
$ `* w) h# c, h" T, yvoid MD5Update (context, input, inputLen)
/ x m6 X* r2 PMD5_CTX *context; /* context */
; o2 Y& ?, f$ B( q/ yunsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
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unsigned int i, index, partLen;

/* Compute number of bytes mod 64 */
index = (unsigned int)((context->count[0] >> 3) & 0x3F);
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/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

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