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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. v7 W# F4 i, j8 U6 n' [2 [: B#define S11 7
3 }. g D' b3 G! B#define S12 12
#define S13 17
9 a2 B7 L8 E# E- K5 T) B#define S14 22
#define S21 5
' T2 c. D8 T$ T% ^. y4 k0 f4 d#define S22 9
9 i* v$ _$ m( x( ?; r#define S23 14
; i+ s; [9 y7 E3 f1 S#define S24 20
#define S31 4
% K5 n* V/ Z% e) G, y% Y7 w- L# c4 H#define S32 11
6 d' N' c' X# f9 W" }9 P% p#define S33 16
0 L0 |0 `- G! u8 Z#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
6 I+ @, H$ \+ ?static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
+ w2 B: Y, _7 E) w3 O2 \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
; r0 S" s% R! z# T) A};
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/* F, G, H and I are basic MD5 functions.
*/
) i \8 Y/ g$ O' W( _1 j#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
* H) Y& g6 D- C `, v+ K+ r#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
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# x0 I. @' Y0 o8 k2 t, |/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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+ e' F4 J, r* m1 ~/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
8 r6 A2 s) q% w2 |Rotation is separate from addition to prevent recomputation.
*/
) P! ?8 U. G( _+ W+ X. S$ G#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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/ _/ C) y+ `7 y! c/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
6 G8 {5 { s- F; _" T$ a/ a- ]void MD5Init (context)
MD5_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.
*/
9 \ c% @: r, ]( U8 y7 \! Ovoid MD5Update (context, input, inputLen)
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);
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/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

guoyun786

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