md5加密算法C++程序

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#include "global.h"
& |$ R9 V) |9 z( V( L6 O' [#include "md5.h"

& u) |7 H7 a1 }/* Constants for MD5Transform routine.
*/


#define S11 7
+ F/ Z5 {/ v- l# |- t, U3 K#define S12 12
! \4 T# ~: V) i5 n3 Z4 E$ D6 R#define S13 17
4 B+ v( N8 |* o1 H7 }#define S14 22
' D9 [$ ]; j! p" {/ y+ i' n' E#define S21 5
#define S22 9
#define S23 14
* h# d7 Q, K4 V3 b#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
8 E |% ?# k% Q3 Z ~#define S42 10
#define S43 15
#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
+ U. T' E3 X. O0 hstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
/ ]- @- q: N4 gstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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" h. N! Y: W9 f( ^- f" _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
, T/ i8 x- l5 S3 J5 Y7 k3 g8 E};

/* F, G, H and I are basic MD5 functions.
*/
1 I, Z% y6 c' |# ? W z+ x5 c: p. K#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))
#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))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
! K7 S e5 v0 ]2 IRotation 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); \
}
9 N7 q5 L; P7 Q" n8 \( R: R#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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/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init (context)
MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
) i& O7 c+ K3 n' r I& ^. f*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
; y; x0 g. A6 C5 ~; k9 q5 u}
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/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
8 w, r( H% u# a5 E& j; kvoid MD5Update (context, input, inputLen)
) L6 H) M- n' j8 QMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
& j$ j* X0 t# [* ~{
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))
&

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