md5加密算法C++程序

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#include "global.h"
#include "md5.h"
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/* Constants for MD5Transform routine.
*/


#define S11 7
#define S12 12
3 k9 s% V& G* K) `9 a+ H#define S13 17
' F: M2 r: c) ?3 F; x#define S14 22
#define S21 5
#define S22 9
#define S23 14
#define S24 20
" u! T& h" Z- K: T$ z#define S31 4
#define S32 11
) P6 w% B: ~0 p4 t#define S33 16
! h7 y/ ], q3 e: @; E' M) i" t5 ~#define S34 23
#define S41 6
/ T$ _+ C6 C+ m) [, b/ S) i2 ~#define S42 10
$ a# g4 a% ?/ n# b: Q& x#define S43 15
4 G+ c; H" J$ Z#define S44 21

+ x/ Q- h( q) T+ F9 R( P6 ?8 astatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
7 L- n$ [2 G" s% |static void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
: M/ y/ o- |/ \6 x! {static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
) M: W- @( P* R: a1 H3 cstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
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/ [$ l9 N1 K& H. Z0 ?- 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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/* F, G, H and I are basic MD5 functions.
*/
+ [5 }2 y/ l6 c; n/ f#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)))

1 H; Q/ z4 i8 d4 x* r" s/* ROTATE_LEFT rotates x left n bits.
*/
7 Q. |, c) h6 q$ `. {; f#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.
*/
#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
8 `7 A7 M5 T$ {/ L#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.
*/
+ ~9 B v0 A! Q* a0 Evoid 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;
, `5 I) D2 ~0 J. F# c% G}

0 k9 l: ^4 t1 J W6 V2 W/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
- q, P' X" c6 N3 E7 Dvoid MD5Update (context, input, inputLen)
# n) L% e: I f% H* ]- W. b; L0 ]% uMD5_CTX *context; /* context */
unsigned char *input; /* input block */
unsigned int inputLen; /* length of input block */
{
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))
&

guoyun786

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