md5加密算法C++程序

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#include "global.h"
#include "md5.h"
/ D0 Y# G4 a, x1 P% n2 D
/* Constants for MD5Transform routine.
*/


#define S11 7
8 _3 m9 p& l) @+ N- f$ y2 h$ Z0 u#define S12 12
#define S13 17
- X, w; z1 t2 v#define S14 22
: A% D0 [3 \0 N# W! J& G#define S21 5
#define S22 9
- b' w* }2 s, ?/ n( U! p* U8 P. v#define S23 14
#define S24 20
K# b9 {) z5 ^7 f9 |$ n; f: x* c: P#define S31 4
, z+ N0 u7 P n#define S32 11
9 S0 @4 d8 _4 J' j#define S33 16
0 h" g8 U6 C! A1 j! z" X4 Q#define S34 23
O2 s! n4 r- p0 T8 x1 K- H#define S41 6
7 _7 g: J3 \$ E- }#define S42 10
#define S43 15
#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
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));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

5 J7 E& m8 _. i( M1 D5 V3 l+ wstatic 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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$ H: c2 b; i* b6 S2 e* J/* F, G, H and I are basic MD5 functions.
*/
#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)))

/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
3 R9 @: J2 v9 M; F( v
/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
1 W2 A. u2 f; H0 X8 d" U( VRotation is separate from addition to prevent recomputation.
*/
; S, W' }' |3 t) K @3 ?4 u#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); \
}
2 E1 ~5 ?8 u% y#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
+ r: L0 f* r( c! `5 c#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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! m' u: S' m5 c9 b( Q5 x8 l' n/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
. P" z; K) s+ M9 M7 N8 c9 H0 O7 hvoid MD5Init (context)
MD5_CTX *context; /* context */
8 C8 G" n" B; ~( W `{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
. D( ?1 e# W: f*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
1 y/ [& L3 K5 z% K r}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5Update (context, input, inputLen)
- q$ Q/ o7 p0 a/ P+ I4 I" ]MD5_CTX *context; /* context */
1 w4 c; A6 _$ S) w! g+ c9 w8 hunsigned char *input; /* input block */
6 R& q5 I7 h: F# Aunsigned int inputLen; /* length of input block */
: S: T# t+ v5 m S" c: Z! o{
unsigned int i, index, partLen;
8 P6 p# c" V$ `& M: s
/* 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))
&

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