摘自opensslglobal.h
#ifndef prototypes
#define prototypes 0
#endif
/* pointer defines a generic pointer type */
typedef unsigned char *pointer;
/* uint2 defines a two byte word */
typedef unsigned short int uint2;
/* uint4 defines a four byte word */
typedef unsigned long int uint4;
/* proto_list is defined depending on how prototypes is defined above.
if using prototypes, then proto_list returns the list, otherwise it
returns an empty list.
*/#if prototypes
#define proto_list(list) list
#else
#define proto_list(list) ()
#endif
md5.h
/* md5 context. */
typedef struct md5_ctx;
void md5init proto_list ((md5_ctx *));
void md5update proto_list
((md5_ctx *, unsigned char *, unsigned int));
void md5final proto_list ((unsigned char [16], md5_ctx *));
md5c.c
#include "global.h"
#include "md5.h"
/* constants for md5transform routine.
*/#define s11 7
#define s12 12
#define s13 17
#define s14 22
#define s21 5
#define s22 9
#define s23 14
#define s24 20
#define s31 4
#define s32 11
#define s33 16
#define s34 23
#define s41 6
#define s42 10
#define s43 15
#define s44 21
static void md5transform proto_list ((uint4 [4], unsigned char [64]));
static 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));
static unsigned char padding[64] = ;
/* 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))))
/* 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)
#define gg(a, b, c, d, x, s, ac)
#define hh(a, b, c, d, x, s, ac)
#define ii(a, b, c, d, x, s, ac)
/* md5 initialization. begins an md5 operation, writing a new context.
*/void md5init (md5_ctx *context)
/* context */
/* md5 block update operation. continues an md5 message-digest
operation, processing another message block, and updating the
context.
*/void md5update (md5_ctx *context, unsigned char *input, unsigned int inputlen)
/* length of input block */
else
i = 0;
/* buffer remaining input */
// md5_memcpy ((pointer)&context->buffer[index], (pointer)&input[i], inputlen-i);
}/* md5 finalization. ends an md5 message-digest operation, writing the
the message digest and zeroizing the context.
*/void md5final (unsigned char digest[16], md5_ctx *context)
/* context */
/* md5 basic transformation. transforms state based on block.
*/static void md5transform (uint4 state[4], unsigned char block[64])
/* encodes input (uint4) into output (unsigned char). assumes len is
a multiple of 4.
*/static void encode (unsigned char *output, uint4 *input, unsigned int len) }
/* decodes input (unsigned char) into output (uint4). assumes len is
a multiple of 4.
*/static void decode (uint4 *output, unsigned char *input, unsigned int len)
/* note: replace "for loop" with standard memcpy if possible.
*/static void md5_memcpy (pointer output, pointer input,unsigned int len)
/* note: replace "for loop" with standard memset if possible.
*/static void md5_memset (pointer output, int value, unsigned int len)
md5_example.c
/*
md5_example.c: an simply example for routines in md5c.c
author: sh yunchen. [email protected]. 1999.3.31
*/#include "global.h"
#include "md5.h"
#define md5encodelen 16
unsigned char* md5(char*str)
int main(int argc, char*argv)
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