md5加密算法C++程序

乐乐天

#include "global.h"
#include "md5.h"
9 h0 ?& q8 Z% e, H i9 ?
/* Constants for MD5Transform routine.
*/

# f- {# H" R3 r/ \5 N9 E& g& z
#define S11 7
#define S12 12
#define S13 17
#define S14 22
( D6 `6 k% b: a7 ^# G#define S21 5
* L3 R6 W' c9 I" Z# j) ]#define S22 9
+ Y! H) h; ~9 x. j! O#define S23 14
8 d9 V! s, Y' P' x0 P#define S24 20
#define S31 4
#define S32 11
#define S33 16
$ a7 ?4 C3 ]/ l+ m0 A+ J& z7 G! C. O#define S34 23
* {; G- }4 Z/ Q' L#define S41 6
6 x6 y; X8 I& ~8 z- Y#define S42 10
( N. z/ i6 G$ o* u2 D#define S43 15
#define S44 21

0 Z" w$ F$ g% M, \, F/ ?4 xstatic void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
, _8 L6 ^7 B3 Z0 y2 Cstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
7 D( }. q, N- m7 m- ?4 y: Mstatic void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
9 f. J! y: B3 x& ? x. ?6 Q+ Cstatic void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));

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
};
8 k- `' Z, r9 n, g( h9 |
/* F, G, H and I are basic MD5 functions.
*/
D, u% c$ j2 n" }% z. F#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
" @; S) b4 h8 n; U& Z; n#define H(x, y, z) ((x) ^ (y) ^ (z))
- r$ E1 ]) `" P N#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
+ ~9 h+ U3 L0 a4 M#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
) o% @6 P3 R& z& S$ Z: X7 `
5 n( m2 i, d( }9 A K! ^& o/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
9 W5 A5 B, M5 ?1 T7 M# V' K, Y#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); \
}
" A$ W1 l) e$ K, i7 {. J6 E#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 v% u+ x* b6 z; y9 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); \
}
; K3 q1 k7 _, ]9 W
F7 k! ]" [$ i! j( I: w0 P @/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
2 [: t0 F H" X Y7 avoid MD5Init (context)
/ E% L8 S' J& H- UMD5_CTX *context; /* context */
6 w" `/ d! I9 @( n8 c _{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
; i$ D, ]" C/ x( s, ]9 Q*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
3 p! z, Y; B7 D1 Fvoid MD5Update (context, input, inputLen)
7 [9 U+ y6 y: t: u# r9 uMD5_CTX *context; /* context */
/ A( h! G2 a( J+ J6 Q$ l {unsigned char *input; /* input block */
4 A9 H' }1 J9 X K4 n4 T& munsigned int inputLen; /* length of input block */
' y1 K; L$ \4 V* V: S$ t{
unsigned int i, index, partLen;
! b6 S$ s/ O$ h9 h7 O( \9 g
/* 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))
&

guoyun786

$ z7 ?! c) D2 _* e3 I' K