md5加密算法C++程序

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#include "global.h"
5 Y5 L9 R7 \. y6 Y#include "md5.h"

/* Constants for MD5Transform routine.
*/
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' W/ |- M1 U( {/ f- v- {) o#define S11 7
/ I6 _- w" C4 @1 Y6 d) z L- h#define S12 12
- d$ C8 H; E+ q) I$ U#define S13 17
6 p4 M, [+ Z5 b+ n#define S14 22
" H8 o" _( |. N+ n; _#define S21 5
#define S22 9
#define S23 14
9 W s, r' F+ E3 G) n+ y#define S24 20
#define S31 4
' M' }$ z, f' E" t# I& ?1 v% U* ?. l#define S32 11
#define S33 16
#define S34 23
6 h! U9 P0 q0 K4 m$ G! b. V+ p#define S41 6
#define S42 10
& p N) |2 B6 C' q#define S43 15
#define S44 21
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3 l1 g, D5 G1 d+ L: lstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
$ I; `4 l2 `! s: O- jstatic 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));
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7 y$ T1 I; `- C' y$ r$ N% u) vstatic 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
};

0 E* o& e5 r a) n* X/* 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)))

) O+ ~8 R1 U8 `8 p/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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3 r7 ]# n6 t9 ~- W/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
; A$ q7 E/ Z b) o' t7 h2 n& }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); \
}
" Q! Q0 s5 C" Z3 _#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
& O1 L4 i8 s+ k& e7 v#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
8 L* F+ u8 e/ K% e#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}

! `+ Y' i. \7 d( Q0 x/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
/ v- }: F7 l0 D+ `8 s8 uvoid MD5Init (context)
* c) W) e% r/ f- L8 ?/ ^* QMD5_CTX *context; /* context */
% O, d' h8 k6 \8 Q- i5 {2 c{
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.
*/
void MD5Update (context, input, inputLen)
, U6 \, u5 s# u) `; [4 F- IMD5_CTX *context; /* context */
2 a7 W& |/ k% r) @0 b: c2 iunsigned char *input; /* input block */
+ ^. k: ~( Q" ?3 } L; J! Sunsigned int inputLen; /* length of input block */
7 d" @$ W% l$ |3 W/ J7 y/ L{
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))
&

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