md5加密算法C++程序

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#include "global.h"
5 z; \. I+ c" V" ^- [#include "md5.h"
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/* Constants for MD5Transform routine.
*/


' g, m; v/ u' j( F" h3 f6 f#define S11 7
]. q! F* i8 u, e#define S12 12
#define S13 17
7 z0 w F: s0 c! A/ ?#define S14 22
#define S21 5
! _" r, D' b& _. y. n( e# {. `#define S22 9
#define S23 14
#define S24 20
#define S31 4
" g$ \6 a0 ?+ @: y: t# {#define S32 11
1 G7 L1 c" a" m! f8 j#define S33 16
& v# [+ L0 V, D3 S#define S34 23
#define S41 6
: \# c. h4 `' R0 {2 _#define S42 10
/ }2 {. v- T9 i) P+ u9 j#define S43 15
# z/ M8 j! q3 L- d, U. I#define S44 21
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static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
0 z$ E4 R/ ]7 A1 l" s5 F2 M/ Q) [& zstatic void Encode PROTO_LIST
((unsigned char *, UINT4 *, unsigned int));
& t# z1 R2 j, |- Wstatic void Decode PROTO_LIST
((UINT4 *, unsigned char *, unsigned int));
& ^5 v7 A9 O5 x# L9 P/ Rstatic 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
};

- O! L/ |5 b5 ]/ v& z& `# V6 o/* F, G, H and I are basic MD5 functions.
*/
" {% k: B- ^9 y! k' w( f7 |#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)))

3 n& j2 N/ l/ C3 C# A/* ROTATE_LEFT rotates x left n bits.
*/
+ S% C1 h! M) g0 e! N* {0 _, F#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
p' }/ {; }; R' y
/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
) G; t" [6 s2 B# bRotation is separate from addition to prevent recomputation.
*/
* {" N# }) ]: ?; h# J4 c#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
+ p! m% `$ b9 B. C#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
6 F- |+ M y# j. K#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
+ Q! ^' \# Z7 m: p4 k! X7 u' 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); \
}

5 J* Z; W2 D$ O/* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
4 h% N2 y5 V7 V) E) F: I9 dvoid MD5Init (context)
MD5_CTX *context; /* context */
{
context->count[0] = context->count[1] = 0;
/* Load magic initialization constants.
, N6 O! _: {5 r2 ~! x& B: X7 ~*/
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
}

$ }& N8 s# J' Z/ T2 @) z/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
4 H& @& ]. o8 C! _$ Svoid MD5Update (context, input, inputLen)
MD5_CTX *context; /* context */
0 d2 I. H' h1 a1 K+ L0 F/ ?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);

/* Update number of bits */
if ((context->count[0] += ((UINT4)inputLen << 3))
&

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