md5加密算法C++程序

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#include "global.h"
#include "md5.h"

/* Constants for MD5Transform routine.
*/
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#define S11 7
, L, [0 D2 m+ u9 w& p#define S12 12
* B- D) F2 X' B7 S% M#define S13 17
+ V/ ~3 C% V- D/ {6 y#define S14 22
: n3 |4 F, H9 l U d v4 }#define S21 5
#define S22 9
M) W7 k% s& _) C3 o# l% x# ~% @#define S23 14
#define S24 20
#define S31 4
2 e+ X& C: ^6 ^- U#define S32 11
. W9 C8 z5 ?1 q5 L) F7 r#define S33 16
" v( @) ~+ w3 r. k7 A#define S34 23
/ Q3 b3 l* k* @% t) K#define S41 6
#define S42 10
#define S43 15
#define S44 21
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) f' q" T, z7 j: r5 X; istatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
3 p2 X L4 t6 p- Y/ v" ? mstatic 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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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
* E" T5 m% i8 w! y/ U};

! V3 y. b$ v8 m/ V/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
) J6 L }" h4 u& R% o# X/ J#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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/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
4 k5 H r, u! r6 l#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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( v2 d* p* S( `5 a/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
) O. j2 ]/ F( f! a Kvoid MD5Init (context)
MD5_CTX *context; /* context */
{
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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" b$ N8 M& F1 |: M( k8 \# a7 Z/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
3 q4 [7 w+ W8 P: V6 Svoid 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;
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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))
&

guoyun786

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