看到很多同学搜寻md5算法,我特意根据php的md5算法写了一个c语言版本,如果大家感兴趣,可以尽情的使用,通过本算法生成的md5摘要,与php的md5函数的结果完全相同。
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- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <syslog.h>
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- int binl2hex( int *src, char *dst, int nsize)
- {
- if( src == 0 )
- return 1;
-
- if( dst == 0 )
- return 1;
-
- if( nsize < 32 )
- return 1;
-
-
- char hex_tab[] = "0123456789abcdef";
-
- int j = 0;
- for(int i = 0; i < 16; i++)
- {
- dst[j++] = hex_tab[(src[i>>2] >> ((i%4)*8+4)) & 0xF];
-
- syslog(LOG_DEBUG,"end:%c-%d-%d-%d",dst[j-1]
- ,(src[i>>2] >> ((i%4)*8+4)),((i%4)*8+4),src[i>>2]);
-
-
- dst[j++] = hex_tab[(src[i>>2] >> ((i%4)*8 )) & 0xF];
- syslog(LOG_DEBUG,"end:%c-%d-%d-%d",dst[j-1]
- ,(src[i>>2] >> ((i%4)*8+4)),((i%4)*8+4),src[i>>2]);
- }
- dst[j] = 0;
- return 0;
- }
-
-
-
-
-
- int str2binl(char * src,int *pndst, int nsize)
- {
- if(src == 0)
- return 1;
-
- if(pndst == 0)
- return 1;
-
- int nloop = strlen(src) * 8;
- if( (nloop >> 5) >= nsize )
- return 1;
-
- for(int i=0; i<nsize; i++ )
- pndst[i] = 0;
-
- int mask = (1 << 8) - 1;
-
- for(int i = 0; i < nloop; i += 8)
- {
- pndst[i>>5] |= ( src[i / 8] & mask) << (i%32);
- }
-
- return 0;
- }
-
-
-
-
- int safe_add(int x, int y)
- {
- int lsw = (x & 0xFFFF) + (y & 0xFFFF);
- int msw = (x >> 16) + (y >> 16) + (lsw >> 16);
- return (msw << 16) | (lsw & 0xFFFF);
- }
-
-
-
-
- int bit_rol(unsigned int num, unsigned int cnt)
- {
-
-
- return (num << cnt) | (num >> (32 - cnt));
- }
-
-
-
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- int md5_cmn(int q, int a, int b, int x, int s, int t)
- {
- return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
- }
- int md5_ff( int a, int b, int c, int d, int x, int s, int t)
- {
- return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
- }
- int md5_gg( int a, int b, int c, int d, int x, int s, int t)
- {
- return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
- }
- int md5_hh( int a, int b, int c, int d, int x, int s, int t)
- {
- return md5_cmn(b ^ c ^ d, a, b, x, s, t);
- }
- int md5_ii( int a, int b, int c, int d, int x, int s, int t)
- {
- return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
- }
-
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-
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- int core_md5( int *x, int len, int * dst)
- {
- if( x == 0)
- return 1;
-
- if( len <= 0 )
- return 1;
-
- if (dst == 0)
- return 1;
-
-
- x[len >> 5] |= 0x80 << ((len) % 32);
-
- syslog(LOG_DEBUG,"x[len >> 5]:%d",x[len >> 5]);
-
-
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- unsigned int ntemp = len + 64;
- x[(((ntemp) >> 9) << 4) + 14] = len;
- syslog(LOG_DEBUG,"x[(((ntemp) >> 9) << 4) + 14]:%d"
- ,x[(((ntemp) >> 9) << 4) + 14]);
-
- int a = 1732584193;
- int b = -271733879;
- int c = -1732584194;
- int d = 271733878;
-
- int ncurrlen = (((ntemp) >> 9) << 4) + 14 + 1;
- for(int i = 0; i < ncurrlen; i += 16)
- {
- int olda = a;
- int oldb = b;
- int oldc = c;
- int oldd = d;
-
- a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
- d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
- c = md5_ff(c, d, a, b, x[i+ 2], 17, 606105819);
- b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
-
- a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
- d = md5_ff(d, a, b, c, x[i+ 5], 12, 1200080426);
- c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
- b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
-
-
- a = md5_ff(a, b, c, d, x[i+ 8], 7 , 1770035416);
- d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
- c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
- b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
-
-
- a = md5_ff(a, b, c, d, x[i+12], 7 , 1804603682);
- d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
- c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
- b = md5_ff(b, c, d, a, x[i+15], 22, 1236535329);
-
-
- a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
- d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
- c = md5_gg(c, d, a, b, x[i+11], 14, 643717713);
- b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
-
- a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
- d = md5_gg(d, a, b, c, x[i+10], 9 , 38016083);
- c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
- b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
-
- a = md5_gg(a, b, c, d, x[i+ 9], 5 , 568446438);
- d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
- c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
- b = md5_gg(b, c, d, a, x[i+ 8], 20, 1163531501);
-
- a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
- d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
- c = md5_gg(c, d, a, b, x[i+ 7], 14, 1735328473);
- b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);
-
- a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
- d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
- c = md5_hh(c, d, a, b, x[i+11], 16, 1839030562);
- b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
-
- a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
- d = md5_hh(d, a, b, c, x[i+ 4], 11, 1272893353);
(王泽宾)
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