md5加密算法C++程序

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#include "global.h"
n4 o0 I2 _7 n/ V, |#include "md5.h"

/* Constants for MD5Transform routine.
*/

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#define S11 7
9 ?0 k) D$ E6 W& I5 x; B2 O#define S12 12
#define S13 17
#define S14 22
( v: O* G: [' {% ~#define S21 5
; ~6 O: Y$ r: W& ~#define S22 9
#define S23 14
$ E2 B7 P) ~: ?) B1 B5 n#define S24 20
#define S31 4
" M Y, ~7 l d$ h0 S k#define S32 11
#define S33 16
#define S34 23
* X J& F5 \9 u5 }: v) K/ D2 x4 C#define S41 6
#define S42 10
# D. l$ ~9 v: S8 m/ Q: d+ h#define S43 15
- z: o+ h% D5 q#define S44 21

static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
7 {4 H; H2 _% d: \. H2 d3 B& E1 ostatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
" F- b$ t& O/ w+ Y7 r t% ostatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

4 R) i3 K9 Q9 d+ X2 i* z( Rstatic 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
% x) a- g+ M9 r! O};

/* 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))))
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6 j6 \ j4 r0 N" S" i; l3 K/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
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); \
}
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
f' v2 ? Q/ R9 E0 R) h, [#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)
- J! P* Q& d0 ?MD5_CTX *context; /* context */
# H# K: H$ `8 M l; G1 A! V{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
, s8 ~# Y J7 a6 `. ]3 k*/
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.
*/
8 k' A8 }0 T6 W, _2 y' t% {; L. ^6 ivoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
unsigned char *input; /* input block */
7 O( T, |/ i% I; p2 _2 xunsigned int inputLen; /* length of input block */
{
unsigned int i, index, partLen;
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/* 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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