❶ 求MD5加密算法的C语言源码
|（转载） #include <stdio.h> #include <stdlib.h> #include <memory.h> #include <time.h> #include <errno.h> #include <string.h> #include <sys/socket.h> #include <sys/types.h> #include <netinet/in.h> #include <arpa/inet.h> #include <netdb.h> #include "../md5/md5.h" #define T1 0xd76aa478 #define T2 0xe8c7b756 #define T3 0x242070db #define T4 0xc1bdceee #define T5 0xf57c0faf #define T6 0x4787c62a #define T7 0xa8304613 #define T8 0xfd469501 #define T9 0x698098d8 #define T10 0x8b44f7af #define T11 0xffff5bb1 #define T12 0x895cd7be #define T13 0x6b901122 #define T14 0xfd987193 #define T15 0xa679438e #define T16 0x49b40821 #define T17 0xf61e2562 #define T18 0xc040b340 #define T19 0x265e5a51 #define T20 0xe9b6c7aa #define T21 0xd62f105d #define T22 0x02441453 #define T23 0xd8a1e681 #define T24 0xe7d3fbc8 #define T25 0x21e1cde6 #define T26 0xc33707d6 #define T27 0xf4d50d87 #define T28 0x455a14ed #define T29 0xa9e3e905 #define T30 0xfcefa3f8 #define T31 0x676f02d9 #define T32 0x8d2a4c8a #define T33 0xfffa3942 #define T34 0x8771f681 #define T35 0x6d9d6122 #define T36 0xfde5380c #define T37 0xa4beea44 #define T38 0x4bdecfa9 #define T39 0xf6bb4b60 #define T40 0xbebfbc70 #define T41 0x289b7ec6 #define T42 0xeaa127fa #define T43 0xd4ef3085 #define T44 0x04881d05 #define T45 0xd9d4d039 #define T46 0xe6db99e5 #define T47 0x1fa27cf8 #define T48 0xc4ac5665 #define T49 0xf4292244 #define T50 0x432aff97 #define T51 0xab9423a7 #define T52 0xfc93a039 #define T53 0x655b59c3 #define T54 0x8f0ccc92 #define T55 0xffeff47d #define T56 0x85845dd1 #define T57 0x6fa87e4f #define T58 0xfe2ce6e0 #define T59 0xa3014314 #define T60 0x4e0811a1 #define T61 0xf7537e82 #define T62 0xbd3af235 #define T63 0x2ad7d2bb #define T64 0xeb86d391 static void md5_process(md5_state_t *pms, const md5_byte_t *data /*[64]*/) { md5_word_t a = pms->abcd[0], b = pms->abcd[1], c = pms->abcd[2], d = pms->abcd[3]; md5_word_t t; #ifndef ARCH_IS_BIG_ENDIAN # define ARCH_IS_BIG_ENDIAN 1 /* slower, default implementation */ #endif #if ARCH_IS_BIG_ENDIAN /* * On big-endian machines, we must arrange the bytes in the right * order. (This also works on machines of unknown byte order.) */ md5_word_t X[16]; const md5_byte_t *xp = data; int i; for (i = 0; i < 16; i, xp = 4) X[i] = xp[0] (xp[1] << 8) (xp[2] << 16) (xp[3] << 24); #else /* !ARCH_IS_BIG_ENDIAN */ /* * On little-endian machines, we can process properly aligned data * without ing it. */ md5_word_t xbuf[16]; const md5_word_t *X; if (!((data – (const md5_byte_t *)0) & 3)) { /* data are properly aligned */ X = (const md5_word_t *)data; } else { /* not aligned */ memcpy(xbuf, data, 64); X = xbuf; } #endif #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32 – (n)))) /* Round 1. */ /* Let [abcd k s i] denote the operation a = b ((a F(b,c,d) X[k] T[i]) <<< s). */ #define F(x, y, z) (((x) & (y)) | (~(x) & (z))) #define SET(a, b, c, d, k, s, Ti)\ t = a F(b,c,d) X[k] Ti;\ a = ROTATE_LEFT(t, s) b /* Do the following 16 operations. */ SET(a, b, c, d, 0, 7, T1); SET(d, a, b, c, 1, 12, T2); SET(c, d, a, b, 2, 17, T3); SET(b, c, d, a, 3, 22, T4); SET(a, b, c, d, 4, 7, T5); SET(d, a, b, c, 5, 12, T6); SET(c, d, a, b, 6, 17, T7); SET(b, c, d, a, 7, 22, T8); SET(a, b, c, d, 8, 7, T9); SET(d, a, b, c, 9, 12, T10); SET(c, d, a, b, 10, 17, T11); SET(b, c, d, a, 11, 22, T12); SET(a, b, c, d, 12, 7, T13); SET(d, a, b, c, 13, 12, T14); SET(c, d, a, b, 14, 17, T15); SET(b, c, d, a, 15, 22, T16); #undef SET /* Round 2. */ /* Let [abcd k s i] denote the operation a = b ((a G(b,c,d) X[k] T[i]) <<< s). */ #define G(x, y, z) (((x) & (z)) | ((y) & ~(z))) #define SET(a, b, c, d, k, s, Ti)\ t = a G(b,c,d) X[k] Ti;\ a = ROTATE_LEFT(t, s) b /* Do the following 16 operations. */ SET(a, b, c, d, 1, 5, T17); SET(d, a, b, c, 6, 9, T18); SET(c, d, a, b, 11, 14, T19); SET(b, c, d, a, 0, 20, T20); SET(a, b, c, d, 5, 5, T21); SET(d, a, b, c, 10, 9, T22); SET(c, d, a, b, 15, 14, T23); SET(b, c, d, a, 4, 20, T24); SET(a, b, c, d, 9, 5, T25); SET(d, a, b, c, 14, 9, T26); SET(c, d, a, b, 3, 14, T27); SET(b, c, d, a, 8, 20, T28); SET(a, b, c, d, 13, 5, T29); SET(d, a, b, c, 2, 9, T30); SET(c, d, a, b, 7, 14, T31); SET(b, c, d, a, 12, 20, T32); #undef SET
❷ 如何对字符串进行MD5加密,用C语言实现,给出源代码和加密函数
#include <stdio.h>#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#define R_memset(x, y, z) memset(x, y, z)#define R_memcpy(x, y, z) memcpy(x, y, z)#define R_memcmp(x, y, z) memcmp(x, y, z)typedef unsigned long UINT4;typedef unsigned char *POINTER;typedef struct {/*四个32bits数,用于存放最终计算得到的消息摘要.当消息长度>512bits时,也用于存放每个512bits的中间结果*/UINT4 state[4];/*存储原始信息的bits数长度,不包括填充的bits,最长为2^64 bits*/UINT4 count[2];/*存放输入的信息的缓冲区,512bits*/unsigned char buffer[64];} MD5_CTX;static void MD5Transform(UINT4[4], unsigned char[64]);static void Encode(unsigned char *, UINT4 *, unsigned int);static void Decode(UINT4 *, unsigned char *, unsigned int);/*用于bits填充的缓冲区,当欲加密的信息的bits数被512除其余数为448时,需要填充的bits的最大值为512=64*8*/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};/*接下来的这几个宏定义是md5算法规定的,就是对信息进行md5加密都要做的运算*/#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)))#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))#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);\}#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);\}
❸ c语言实现MD5加密算法，出现问题求解
找不到md5.h的头文件 将你的md5.h头文件跟你的c文件放在同一目录下
❹ C语言实现文件传输时用md5加密
你需要先搞一个openssl的库，然后调用相应的md5的函数就好了
❺ 求32位MD5加密c语言源码
#include<stdio.h>#include<string.h>#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)))#define RL(x, y) (((x) << (y)) | ((x) >> (32 – (y)))) //x向左循环移y位#define PP(x) (x<<24)|((x<<8)&0xff0000)|((x>>8)&0xff00)|(x>>24) //将x高低位互换,例如PP(aabbccdd)=ddccbbaa#define FF(a, b, c, d, x, s, ac) a = b + (RL((a + F(b,c,d) + x + ac),s))#define GG(a, b, c, d, x, s, ac) a = b + (RL((a + G(b,c,d) + x + ac),s))#define HH(a, b, c, d, x, s, ac) a = b + (RL((a + H(b,c,d) + x + ac),s))#define II(a, b, c, d, x, s, ac) a = b + (RL((a + I(b,c,d) + x + ac),s))unsigned A,B,C,D,a,b,c,d,i,len,flen[2],x[16]; //i临时变量,len文件长,flen[2]为64位二进制表示的文件初始长度char filename[200]; //文件名FILE *fp;void md5(){ //MD5核心算法,供64轮 a=A,b=B,c=C,d=D; /**//* Round 1 */ FF (a, b, c, d, x[ 0], 7, 0xd76aa478); /**//* 1 */ FF (d, a, b, c, x[ 1], 12, 0xe8c7b756); /**//* 2 */ FF (c, d, a, b, x[ 2], 17, 0x242070db); /**//* 3 */ FF (b, c, d, a, x[ 3], 22, 0xc1bdceee); /**//* 4 */ FF (a, b, c, d, x[ 4], 7, 0xf57c0faf); /**//* 5 */ FF (d, a, b, c, x[ 5], 12, 0x4787c62a); /**//* 6 */ FF (c, d, a, b, x[ 6], 17, 0xa8304613); /**//* 7 */ FF (b, c, d, a, x[ 7], 22, 0xfd469501); /**//* 8 */ FF (a, b, c, d, x[ 8], 7, 0x698098d8); /**//* 9 */ FF (d, a, b, c, x[ 9], 12, 0x8b44f7af); /**//* 10 */ FF (c, d, a, b, x[10], 17, 0xffff5bb1); /**//* 11 */ FF (b, c, d, a, x[11], 22, 0x895cd7be); /**//* 12 */ FF (a, b, c, d, x[12], 7, 0x6b901122); /**//* 13 */ FF (d, a, b, c, x[13], 12, 0xfd987193); /**//* 14 */ FF (c, d, a, b, x[14], 17, 0xa679438e); /**//* 15 */ FF (b, c, d, a, x[15], 22, 0x49b40821); /**//* 16 */ /**//* Round 2 */ GG (a, b, c, d, x[ 1], 5, 0xf61e2562); /**//* 17 */ GG (d, a, b, c, x[ 6], 9, 0xc040b340); /**//* 18 */ GG (c, d, a, b, x[11], 14, 0x265e5a51); /**//* 19 */ GG (b, c, d, a, x[ 0], 20, 0xe9b6c7aa); /**//* 20 */ GG (a, b, c, d, x[ 5], 5, 0xd62f105d); /**//* 21 */ GG (d, a, b, c, x[10], 9, 0x02441453); /**//* 22 */ GG (c, d, a, b, x[15], 14, 0xd8a1e681); /**//* 23 */ GG (b, c, d, a, x[ 4], 20, 0xe7d3fbc8); /**//* 24 */ GG (a, b, c, d, x[ 9], 5, 0x21e1cde6); /**//* 25 */ GG (d, a, b, c, x[14], 9, 0xc33707d6); /**//* 26 */ GG (c, d, a, b, x[ 3], 14, 0xf4d50d87); /**//* 27 */ GG (b, c, d, a, x[ 8], 20, 0x455a14ed); /**//* 28 */ GG (a, b, c, d, x[13], 5, 0xa9e3e905); /**//* 29 */ GG (d, a, b, c, x[ 2], 9, 0xfcefa3f8); /**//* 30 */ GG (c, d, a, b, x[ 7], 14, 0x676f02d9); /**//* 31 */ GG (b, c, d, a, x[12], 20, 0x8d2a4c8a); /**//* 32 */ /**//* Round 3 */ HH (a, b, c, d, x[ 5], 4, 0xfffa3942); /**//* 33 */ HH (d, a, b, c, x[ 8], 11, 0x8771f681); /**//* 34 */ HH (c, d, a, b, x[11], 16, 0x6d9d6122); /**//* 35 */ HH (b, c, d, a, x[14], 23, 0xfde5380c); /**//* 36 */ HH (a, b, c, d, x[ 1], 4, 0xa4beea44); /**//* 37 */ HH (d, a, b, c, x[ 4], 11, 0x4bdecfa9); /**//* 38 */ HH (c, d, a, b, x[ 7], 16, 0xf6bb4b60); /**//* 39 */ HH (b, c, d, a, x[10], 23, 0xbebfbc70); /**//* 40 */ HH (a, b, c, d, x[13], 4, 0x289b7ec6); /**//* 41 */ HH (d, a, b, c, x[ 0], 11, 0xeaa127fa); /**//* 42 */ HH (c, d, a, b, x[ 3], 16, 0xd4ef3085); /**//* 43 */ HH (b, c, d, a, x[ 6], 23, 0x04881d05); /**//* 44 */ HH (a, b, c, d, x[ 9], 4, 0xd9d4d039); /**//* 45 */ HH (d, a, b, c, x[12], 11, 0xe6db99e5); /**//* 46 */ HH (c, d, a, b, x[15], 16, 0x1fa27cf8); /**//* 47 */ HH (b, c, d, a, x[ 2], 23, 0xc4ac5665); /**//* 48 */ /**//* Round 4 */ II (a, b, c, d, x[ 0], 6, 0xf4292244); /**//* 49 */ II (d, a, b, c, x[ 7], 10, 0x432aff97); /**//* 50 */ II (c, d, a, b, x[14], 15, 0xab9423a7); /**//* 51 */ II (b, c, d, a, x[ 5], 21, 0xfc93a039); /**//* 52 */ II (a, b, c, d, x[12], 6, 0x655b59c3); /**//* 53 */ II (d, a, b, c, x[ 3], 10, 0x8f0ccc92); /**//* 54 */ II (c, d, a, b, x[10], 15, 0xffeff47d); /**//* 55 */ II (b, c, d, a, x[ 1], 21, 0x85845dd1); /**//* 56 */ II (a, b, c, d, x[ 8], 6, 0x6fa87e4f); /**//* 57 */ II (d, a, b, c, x[15], 10, 0xfe2ce6e0); /**//* 58 */ II (c, d, a, b, x[ 6], 15, 0xa3014314); /**//* 59 */ II (b, c, d, a, x[13], 21, 0x4e0811a1); /**//* 60 */ II (a, b, c, d, x[ 4], 6, 0xf7537e82); /**//* 61 */ II (d, a, b, c, x[11], 10, 0xbd3af235); /**//* 62 */ II (c, d, a, b, x[ 2], 15, 0x2ad7d2bb); /**//* 63 */ II (b, c, d, a, x[ 9], 21, 0xeb86d391); /**//* 64 */ A += a; B += b; C += c; D += d;}main(){ while(1){ printf("Input file:"); gets(filename); //用get函数,避免scanf以空格分割数据, if (filename[0]==34) filename[strlen(filename)-1]=0,strcpy(filename,filename+1); //支持文件拖曳,但会多出双引号,这里是处理多余的双引号 if (!strcmp(filename,"exit")) exit(0); //输入exit退出 if (!(fp=fopen(filename,"rb"))) {printf("Can not open this file!\n");continue;} //以二进制打开文件 fseek(fp, 0, SEEK_END); //文件指针转到文件末尾 if((len=ftell(fp))==-1) {printf("Sorry! Can not calculate files which larger than 2 GB!\n");fclose(fp);continue;} //ftell函数返回long,最大为2GB,超出返回-1 rewind(fp); //文件指针复位到文件头 A=0x67452301,B=0xefcdab89,C=0x98badcfe,D=0x10325476; //初始化链接变量 flen[1]=len/0x20000000; //flen单位是bit flen[0]=(len%0x20000000)*8; memset(x,0,64); //初始化x数组为0 fread(&x,4,16,fp); //以4字节为一组,读取16组数据 for(i=0;i<len/64;i++){ //循环运算直至文件结束 md5(); memset(x,0,64); fread(&x,4,16,fp); } ((char*)x)[len%64]=128; //文件结束补1,补0操作,128二进制即10000000 if(len%64>55) md5(),memset(x,0,64); memcpy(x+14,flen,8); //文件末尾加入原文件的bit长度 md5(); fclose(fp); printf("MD5 Code:%08x%08x%08x%08x\n",PP(A),PP(B),PP(C),PP(D)); //高低位逆反输出 }}
❻ C语言怎么实现对一长串字符进行MD5加密
#include<stdio.h>#include<stdlib.h>#defineARR_LEN100#defineF(x,y,z)((x&y)|(~x&z))#defineG(x,y,z)((x&z)|(y&~z))#defineH(x,y,z)(x^y^z)#defineI(x,y,z)(y^(x|~z))#defineROTATE_LEFT(x,n)((x<<n)|(x>>(32-n)))#defineFF(a,b,c,d,x,s,ac){a+=F(b,c,d)+x+ac;a=ROTATE_LEFT(a,s);a+=b;}#defineGG(a,b,c,d,x,s,ac){a+=G(b,c,d)+x+ac;a=ROTATE_LEFT(a,s);a+=b;}#defineHH(a,b,c,d,x,s,ac){a+=H(b,c,d)+x+ac;a=ROTATE_LEFT(a,s);a+=b;}#defineII(a,b,c,d,x,s,ac){a+=I(b,c,d)+x+ac;a=ROTATE_LEFT(a,s);a+=b;}typedefstruct{unsignedintcount[2];unsignedintstate[4];unsignedcharbuffer[64];}MD5_CTX;voidMD5Init(MD5_CTX*context);voidMD5Update(MD5_CTX*context,unsignedchar*input,unsignedintinputlen);voidMD5Final(MD5_CTX*context,unsignedchardigest[16]);voidMD5Transform(unsignedintstate[4],unsignedcharblock[64]);voidMD5Encode(unsignedchar*output,unsignedint*input,unsignedintlen);voidMD5Decode(unsignedint*output,unsignedchar*input,unsignedintlen);unsignedcharPADDING[]={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};voidMD5Init(MD5_CTX*context){context->count[0]=0;context->count[1]=0;context->state[0]=0x67452301;context->state[1]=0xEFCDAB89;context->state[2]=0x98BADCFE;context->state[3]=0x10325476;}voidMD5Update(MD5_CTX*context,unsignedchar*input,unsignedintinputlen){unsignedinti=0,index=0,partlen=0;index=(context->count[0]>>3)&0x3F;partlen=64-index;context->count[0]+=inputlen<<3;if(context->count[0]<(inputlen<<3))context->count[1]++;context->count[1]+=inputlen>>29;if(inputlen>=partlen){memcpy(&context->buffer[index],input,partlen);MD5Transform(context->state,context->buffer);for(i=partlen;i+64<=inputlen;i+=64)MD5Transform(context->state,&input[i]);index=0;}else{i=0;}memcpy(&context->buffer[index],&input[i],inputlen-i);}voidMD5Final(MD5_CTX*context,unsignedchardigest[16]){unsignedintindex=0,padlen=0;unsignedcharbits[8];index=(context->count[0]>>3)&0x3F;padlen=(index<56)?(56-index):(120-index);MD5Encode(bits,context->count,8);MD5Update(context,PADDING,padlen);MD5Update(context,bits,8);MD5Encode(digest,context->state,16);}voidMD5Encode(unsignedchar*output,unsignedint*input,unsignedintlen){unsignedinti=0,j=0;while(j<len){output[j]=input[i]&0xFF;output[j+1]=(input[i]>>8)&0xFF;output[j+2]=(input[i]>>16)&0xFF;output[j+3]=(input[i]>>24)&0xFF;i++;j+=4;}}voidMD5Decode(unsignedint*output,unsignedchar*input,unsignedintlen){unsignedinti=0,j=0;while(j<len){output[i]=(input[j])|(input[j+1]<<8)|(input[j+2]<<16)|(input[j+3]<<24);i++;j+=4;}}voidMD5Transform(unsignedintstate[4],unsignedcharblock[64]){unsignedinta=state[0];unsignedintb=state[1];unsignedintc=state[2];unsignedintd=state[3];unsignedintx[64];MD5Decode(x,block,64);FF(a,b,c,d,x[0],7,0xd76aa478);/*1*/FF(d,a,b,c,x[1],12,0xe8c7b756);/*2*/FF(c,d,a,b,x[2],17,0x242070db);/*3*/FF(b,c,d,a,x[3],22,0xc1bdceee);/*4*/FF(a,b,c,d,x[4],7,0xf57c0faf);/*5*/FF(d,a,b,c,x[5],12,0x4787c62a);/*6*/FF(c,d,a,b,x[6],17,0xa8304613);/*7*/FF(b,c,d,a,x[7],22,0xfd469501);/*8*/FF(a,b,c,d,x[8],7,0x698098d8);/*9*/FF(d,a,b,c,x[9],12,0x8b44f7af);/*10*/FF(c,d,a,b,x[10],17,0xffff5bb1);/*11*/FF(b,c,d,a,x[11],22,0x895cd7be);/*12*/FF(a,b,c,d,x[12],7,0x6b901122);/*13*/FF(d,a,b,c,x[13],12,0xfd987193);/*14*/FF(c,d,a,b,x[14],17,0xa679438e);/*15*/FF(b,c,d,a,x[15],22,0x49b40821);/*16*//*Round2*/GG(a,b,c,d,x[1],5,0xf61e2562);/*17*/GG(d,a,b,c,x[6],9,0xc040b340);/*18*/GG(c,d,a,b,x[11],14,0x265e5a51);/*19*/GG(b,c,d,a,x[0],20,0xe9b6c7aa);/*20*/GG(a,b,c,d,x[5],5,0xd62f105d);/*21*/GG(d,a,b,c,x[10],9,0×2441453);/*22*/GG(c,d,a,b,x[15],14,0xd8a1e681);/*23*/GG(b,c,d,a,x[4],20,0xe7d3fbc8);/*24*/GG(a,b,c,d,x[9],5,0x21e1cde6);/*25*/GG(d,a,b,c,x[14],9,0xc33707d6);/*26*/GG(c,d,a,b,x[3],14,0xf4d50d87);/*27*/GG(b,c,d,a,x[8],20,0x455a14ed);/*28*/GG(a,b,c,d,x[13],5,0xa9e3e905);/*29*/GG(d,a,b,c,x[2],9,0xfcefa3f8);/*30*/GG(c,d,a,b,x[7],14,0x676f02d9);/*31*/GG(b,c,d,a,x[12],20,0x8d2a4c8a);/*32*//*Round3*/HH(a,b,c,d,x[5],4,0xfffa3942);/*33*/HH(d,a,b,c,x[8],11,0x8771f681);/*34*/HH(c,d,a,b,x[11],16,0x6d9d6122);/*35*/HH(b,c,d,a,x[14],23,0xfde5380c);/*36*/HH(a,b,c,d,x[1],4,0xa4beea44);/*37*/HH(d,a,b,c,x[4],11,0x4bdecfa9);/*38*/HH(c,d,a,b,x[7],16,0xf6bb4b60);/*39*/HH(b,c,d,a,x[10],23,0xbebfbc70);/*40*/HH(a,b,c,d,x[13],4,0x289b7ec6);/*41*/HH(d,a,b,c,x[0],11,0xeaa127fa);/*42*/HH(c,d,a,b,x[3],16,0xd4ef3085);/*43*/HH(b,c,d,a,x[6],23,0x4881d05);/*44*/HH(a,b,c,d,x[9],4,0xd9d4d039);/*45*/HH(d,a,b,c,x[12],11,0xe6db99e5);/*46*/HH(c,d,a,b,x[15],16,0x1fa27cf8);/*47*/HH(b,c,d,a,x[2],23,0xc4ac5665);/*48*//*Round4*/II(a,b,c,d,x[0],6,0xf4292244);/*49*/II(d,a,b,c,x[7],10,0x432aff97);/*50*/II(c,d,a,b,x[14],15,0xab9423a7);/*51*/II(b,c,d,a,x[5],21,0xfc93a039);/*52*/II(a,b,c,d,x[12],6,0x655b59c3);/*53*/II(d,a,b,c,x[3],10,0x8f0ccc92);/*54*/II(c,d,a,b,x[10],15,0xffeff47d);/*55*/II(b,c,d,a,x[1],21,0x85845dd1);/*56*/II(a,b,c,d,x[8],6,0x6fa87e4f);/*57*/II(d,a,b,c,x[15],10,0xfe2ce6e0);/*58*/II(c,d,a,b,x[6],15,0xa3014314);/*59*/II(b,c,d,a,x[13],21,0x4e0811a1);/*60*/II(a,b,c,d,x[4],6,0xf7537e82);/*61*/II(d,a,b,c,x[11],10,0xbd3af235);/*62*/II(c,d,a,b,x[2],15,0x2ad7d2bb);/*63*/II(b,c,d,a,x[9],21,0xeb86d391);/*64*/state[0]+=a;state[1]+=b;state[2]+=c;state[3]+=d;}intmain(intargc,char*argv[]){inti;unsignedcharencrypt[ARR_LEN];unsignedchardecrypt[16];MD5_CTXmd5;printf("【测试1】");printf("加密前：Bai");printf("加密后：");printf("");printf("【测试2】");printf("加密前：Bihaifeng");printf("加密后：");printf("");printf("======================================================");printf("请输入需MD5加密的字符串：");gets(encrypt);printf("");printf("======================================================");MD5Init(&md5);MD5Update(&md5,encrypt,strlen((char*)encrypt));MD5Final(&md5,decrypt);printf("加密前：%s加密后：",encrypt);for(i=0;i<16;i++){printf("%02x",decrypt[i]);}printf("");getch();return0;}
运行结果
以上源代码非原创~~
❼ 求一个简单的md5加密程序C或C++代码
C语言实现MD5算法 #include<stdio.h>#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)))#define RL(x, y) (((x) << (y)) | ((x) >> (32 – (y)))) //x向左循环移y位#define PP(x) (x<<24)|((x<<8)&0xff0000)|((x>>8)&0xff00)|(x>>24) //将x高低位互换,例如PP(aabbccdd)=ddccbbaa#define FF(a, b, c, d, x, s, ac) a = b + (RL((a + F(b,c,d) + x + ac),s))#define GG(a, b, c, d, x, s, ac) a = b + (RL((a + G(b,c,d) + x + ac),s))#define HH(a, b, c, d, x, s, ac) a = b + (RL((a + H(b,c,d) + x + ac),s))#define II(a, b, c, d, x, s, ac) a = b + (RL((a + I(b,c,d) + x + ac),s))unsigned A,B,C,D,a,b,c,d,i,len,flen[2],x[16]; //i临时变量,len文件长,flen[2]为64位二进制表示的文件初始长度char filename[200]; //文件名FILE *fp;void md5(){ //MD5核心算法,供64轮 a=A,b=B,c=C,d=D; /**//* Round 1 */ FF (a, b, c, d, x[ 0], 7, 0xd76aa478); /**//* 1 */ FF (d, a, b, c, x[ 1], 12, 0xe8c7b756); /**//* 2 */ FF (c, d, a, b, x[ 2], 17, 0x242070db); /**//* 3 */ FF (b, c, d, a, x[ 3], 22, 0xc1bdceee); /**//* 4 */ FF (a, b, c, d, x[ 4], 7, 0xf57c0faf); /**//* 5 */ FF (d, a, b, c, x[ 5], 12, 0x4787c62a); /**//* 6 */ FF (c, d, a, b, x[ 6], 17, 0xa8304613); /**//* 7 */ FF (b, c, d, a, x[ 7], 22, 0xfd469501); /**//* 8 */ FF (a, b, c, d, x[ 8], 7, 0x698098d8); /**//* 9 */ FF (d, a, b, c, x[ 9], 12, 0x8b44f7af); /**//* 10 */ FF (c, d, a, b, x[10], 17, 0xffff5bb1); /**//* 11 */ FF (b, c, d, a, x[11], 22, 0x895cd7be); /**//* 12 */ FF (a, b, c, d, x[12], 7, 0x6b901122); /**//* 13 */ FF (d, a, b, c, x[13], 12, 0xfd987193); /**//* 14 */ FF (c, d, a, b, x[14], 17, 0xa679438e); /**//* 15 */ FF (b, c, d, a, x[15], 22, 0x49b40821); /**//* 16 */ /**//* Round 2 */ GG (a, b, c, d, x[ 1], 5, 0xf61e2562); /**//* 17 */ GG (d, a, b, c, x[ 6], 9, 0xc040b340); /**//* 18 */ GG (c, d, a, b, x[11], 14, 0x265e5a51); /**//* 19 */ GG (b, c, d, a, x[ 0], 20, 0xe9b6c7aa); /**//* 20 */ GG (a, b, c, d, x[ 5], 5, 0xd62f105d); /**//* 21 */ GG (d, a, b, c, x[10], 9, 0x02441453); /**//* 22 */ GG (c, d, a, b, x[15], 14, 0xd8a1e681); /**//* 23 */ GG (b, c, d, a, x[ 4], 20, 0xe7d3fbc8); /**//* 24 */ GG (a, b, c, d, x[ 9], 5, 0x21e1cde6); /**//* 25 */ GG (d, a, b, c, x[14], 9, 0xc33707d6); /**//* 26 */ GG (c, d, a, b, x[ 3], 14, 0xf4d50d87); /**//* 27 */ GG (b, c, d, a, x[ 8], 20, 0x455a14ed); /**//* 28 */ GG (a, b, c, d, x[13], 5, 0xa9e3e905); /**//* 29 */ GG (d, a, b, c, x[ 2], 9, 0xfcefa3f8); /**//* 30 */ GG (c, d, a, b, x[ 7], 14, 0x676f02d9); /**//* 31 */ GG (b, c, d, a, x[12], 20, 0x8d2a4c8a); /**//* 32 */ /**//* Round 3 */ HH (a, b, c, d, x[ 5], 4, 0xfffa3942); /**//* 33 */ HH (d, a, b, c, x[ 8], 11, 0x8771f681); /**//* 34 */ HH (c, d, a, b, x[11], 16, 0x6d9d6122); /**//* 35 */ HH (b, c, d, a, x[14], 23, 0xfde5380c); /**//* 36 */ HH (a, b, c, d, x[ 1], 4, 0xa4beea44); /**//* 37 */ HH (d, a, b, c, x[ 4], 11, 0x4bdecfa9); /**//* 38 */ HH (c, d, a, b, x[ 7], 16, 0xf6bb4b60); /**//* 39 */ HH (b, c, d, a, x[10], 23, 0xbebfbc70); /**//* 40 */ HH (a, b, c, d, x[13], 4, 0x289b7ec6); /**//* 41 */ HH (d, a, b, c, x[ 0], 11, 0xeaa127fa); /**//* 42 */ HH (c, d, a, b, x[ 3], 16, 0xd4ef3085); /**//* 43 */ HH (b, c, d, a, x[ 6], 23, 0x04881d05); /**//* 44 */ HH (a, b, c, d, x[ 9], 4, 0xd9d4d039); /**//* 45 */ HH (d, a, b, c, x[12], 11, 0xe6db99e5); /**//* 46 */ HH (c, d, a, b, x[15], 16, 0x1fa27cf8); /**//* 47 */ HH (b, c, d, a, x[ 2], 23, 0xc4ac5665); /**//* 48 */ /**//* Round 4 */ II (a, b, c, d, x[ 0], 6, 0xf4292244); /**//* 49 */ II (d, a, b, c, x[ 7], 10, 0x432aff97); /**//* 50 */ II (c, d, a, b, x[14], 15, 0xab9423a7); /**//* 51 */ II (b, c, d, a, x[ 5], 21, 0xfc93a039); /**//* 52 */ II (a, b, c, d, x[12], 6, 0x655b59c3); /**//* 53 */ II (d, a, b, c, x[ 3], 10, 0x8f0ccc92); /**//* 54 */ II (c, d, a, b, x[10], 15, 0xffeff47d); /**//* 55 */ II (b, c, d, a, x[ 1], 21, 0x85845dd1); /**//* 56 */ II (a, b, c, d, x[ 8], 6, 0x6fa87e4f); /**//* 57 */ II (d, a, b, c, x[15], 10, 0xfe2ce6e0); /**//* 58 */ II (c, d, a, b, x[ 6], 15, 0xa3014314); /**//* 59 */ II (b, c, d, a, x[13], 21, 0x4e0811a1); /**//* 60 */ II (a, b, c, d, x[ 4], 6, 0xf7537e82); /**//* 61 */ II (d, a, b, c, x[11], 10, 0xbd3af235); /**//* 62 */ II (c, d, a, b, x[ 2], 15, 0x2ad7d2bb); /**//* 63 */ II (b, c, d, a, x[ 9], 21, 0xeb86d391); /**//* 64 */ A += a; B += b; C += c; D += d;}main(){ while(1){ printf("Input file:"); gets(filename); //用get函数,避免scanf以空格分割数据, if (filename[0]==34) filename[strlen(filename)-1]=0,strcpy(filename,filename+1); //支持文件拖曳,但会多出双引号,这里是处理多余的双引号 if (!strcmp(filename,"exit")) exit(0); //输入exit退出 if (!(fp=fopen(filename,"rb"))) {printf("Can not open this file!\n");continue;} //以二进制打开文件 fseek(fp, 0, SEEK_END); //文件指针转到文件末尾 if((len=ftell(fp))==-1) {printf("Sorry! Can not calculate files which larger than 2 GB!\n");fclose(fp);continue;} //ftell函数返回long,最大为2GB,超出返回-1 rewind(fp); //文件指针复位到文件头 A=0x67452301,B=0xefcdab89,C=0x98badcfe,D=0x10325476; //初始化链接变量 flen[1]=len/0x20000000; //flen单位是bit flen[0]=(len%0x20000000)*8; memset(x,0,64); //初始化x数组为0 fread(&x,4,16,fp); //以4字节为一组,读取16组数据 for(i=0;i<len/64;i++){ //循环运算直至文件结束 md5(); memset(x,0,64); fread(&x,4,16,fp); } ((char*)x)[len%64]=128; //文件结束补1,补0操作,128二进制即10000000 if(len%64>55) md5(),memset(x,0,64); memcpy(x+14,flen,8); //文件末尾加入原文件的bit长度 md5(); fclose(fp); printf("MD5 Code:%08x%08x%08x%08x\n",PP(A),PP(B),PP(C),PP(D)); //高低位逆反输出 }}
❽ C语言下对字符串进行MD5加密
怎么发给你？ md5.h//===================================================#ifndef MD5_H#define MD5_H#include <string>#include <fstream>/* Type define */typedef unsigned char byte;typedef unsigned int uint32;using std::string;using std::ifstream;/* MD5 declaration. */class MD5 {public: MD5(); MD5(const void* input, size_t length); MD5(const string& str); MD5(ifstream& in); void update(const void* input, size_t length); void update(const string& str); void update(ifstream& in); const byte* digest(); string toString(); void reset();private: void update(const byte* input, size_t length); void final(); void transform(const byte block[64]); void encode(const uint32* input, byte* output, size_t length); void decode(const byte* input, uint32* output, size_t length); string bytesToHexString(const byte* input, size_t length); /* class unable */ MD5(const MD5&); MD5& operator=(const MD5&);private: uint32 _state[4]; /* state (ABCD) */ uint32 _count[2]; /* number of bits, molo 2^64 (low-order word first) */ byte _buffer[64]; /* input buffer */ byte _digest[16]; /* message digest */ bool _finished; /* calculate finished ? */ static const byte PADDING[64]; /* padding for calculate */ static const char HEX[16]; enum { BUFFER_SIZE = 1024 };};#endif /*MD5_H*/ md5.cpp//==============================================#include "md5.h"using namespace std;/* 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/* 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) { \ (a) += F ((b), (c), (d)) + (x) + ac; \ (a) = ROTATE_LEFT ((a), (s)); \ (a) += (b); \}#define GG(a, b, c, d, x, s, ac) { \ (a) += G ((b), (c), (d)) + (x) + ac; \ (a) = ROTATE_LEFT ((a), (s)); \ (a) += (b); \}#define HH(a, b, c, d, x, s, ac) { \ (a) += H ((b), (c), (d)) + (x) + ac; \ (a) = ROTATE_LEFT ((a), (s)); \ (a) += (b); \}#define II(a, b, c, d, x, s, ac) { \ (a) += I ((b), (c), (d)) + (x) + ac; \ (a) = ROTATE_LEFT ((a), (s)); \ (a) += (b); \}const byte MD5::PADDING[64] = { 0x80 };const char MD5::HEX[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};/* Default construct. */MD5::MD5() { reset();}/* Construct a MD5 object with a input buffer. */MD5::MD5(const void* input, size_t length) { reset(); update(input, length);}/* Construct a MD5 object with a string. */MD5::MD5(const string& str) { reset(); update(str);}/* Construct a MD5 object with a file. */MD5::MD5(ifstream& in) { reset(); update(in);}/* Return the message-digest */const byte* MD5::digest() { if (!_finished) { _finished = true; final(); } return _digest;}/* Reset the calculate state */void MD5::reset() { _finished = false; /* reset number of bits. */ _count[0] = _count[1] = 0; /* Load magic initialization constants. */ _state[0] = 0x67452301; _state[1] = 0xefcdab89; _state[2] = 0x98badcfe; _state[3] = 0x10325476;}/* Updating the context with a input buffer. */void MD5::update(const void* input, size_t length) { update((const byte*)input, length);}/* Updating the context with a string. */void MD5::update(const string& str) { update((const byte*)str.c_str(), str.length());}/* Updating the context with a file. */void MD5::update(ifstream& in) { if (!in) { return; } std::streamsize length; char buffer[BUFFER_SIZE]; while (!in.eof()) { in.read(buffer, BUFFER_SIZE); length = in.gcount(); if (length > 0) { update(buffer, length); } } in.close();}/* MD5 block update operation. Continues an MD5 message-digestoperation, processing another message block, and updating thecontext.*/void MD5::update(const byte* input, size_t length) { uint32 i, index, partLen; _finished = false; /* Compute number of bytes mod 64 */ index = (uint32)((_count[0] >> 3) & 0x3f); /* update number of bits */ if ((_count[0] += ((uint32)length << 3)) < ((uint32)length << 3)) { ++_count[1]; } _count[1] += ((uint32)length >> 29); partLen = 64 – index; /* transform as many times as possible. */ if (length >= partLen) { memcpy(&_buffer[index], input, partLen); transform(_buffer); for (i = partLen; i + 63 < length; i += 64) { transform(&input[i]); } index = 0; } else { i = 0; } /* Buffer remaining input */ memcpy(&_buffer[index], &input[i], length – i);}/* MD5 finalization. Ends an MD5 message-_digest operation, writing thethe message _digest and zeroizing the context.*/void MD5::final() { byte bits[8]; uint32 oldState[4]; uint32 oldCount[2]; uint32 index, padLen; /* Save current state and count. */ memcpy(oldState, _state, 16); memcpy(oldCount, _count, 8); /* Save number of bits */ encode(_count, bits, 8); /* Pad out to 56 mod 64. */ index = (uint32)((_count[0] >> 3) & 0x3f); padLen = (index < 56) ? (56 – index) : (120 – index); update(PADDING, padLen); /* Append length (before padding) */ update(bits, 8); /* Store state in digest */ encode(_state, _digest, 16); /* Restore current state and count. */ memcpy(_state, oldState, 16); memcpy(_count, oldCount, 8);}/* MD5 basic transformation. Transforms _state based on block. */void MD5::transform(const byte block[64]) { uint32 a = _state[0], b = _state[1], c = _state[2], d = _state[3], x[16]; decode(block, x, 64); /* Round 1 */ FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */ FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */ FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */ FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */ FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */ FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */ FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */ FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */ FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */ FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */ FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */ FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */ FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */ FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */ FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */ FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */ /* Round 2 */ GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */ GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */ GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */ GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */ GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */ GG (d, a, b, c, x[10], S22, 0x2441453); /* 22 */ GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */ GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */ GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */ GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */ GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */ GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */ GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */ GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */ GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */ GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */ /* Round 3 */ HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */ HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */ HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */ HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */ HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */ HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */ HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */ HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */ HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */ HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */ HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */ HH (b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */ HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */ HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */ HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */ HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */ /* Round 4 */ II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */ II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */ II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */ II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */ II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */ II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */ II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */ II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */ II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */ II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */ II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */ II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */ II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */ II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */ II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */ II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */ _state[0] += a; _state[1] += b; _state[2] += c; _state[3] += d;}/* Encodes input (ulong) into output (byte). Assumes length isa multiple of 4.*/void MD5::encode(const uint32* input, byte* output, size_t length) { for (size_t i = 0, j = 0; j < length; ++i, j += 4) { output[j]= (byte)(input[i] & 0xff); output[j + 1] = (byte)((input[i] >> 8) & 0xff); output[j + 2] = (byte)((input[i] >> 16) & 0xff); output[j + 3] = (byte)((input[i] >> 24) & 0xff); }}/* Decodes input (byte) into output (ulong). Assumes length isa multiple of 4.*/void MD5::decode(const byte* input, uint32* output, size_t length) { for (size_t i = 0, j = 0; j < length; ++i, j += 4) { output[i] = ((uint32)input[j]) | (((uint32)input[j + 1]) << 8) | (((uint32)input[j + 2]) << 16) | (((uint32)input[j + 3]) << 24); }}/* Convert byte array to hex string. */string MD5::bytesToHexString(const byte* input, size_t length) { string str; str.reserve(length << 1); for (size_t i = 0; i < length; ++i) { int t = input[i]; int a = t / 16; int b = t % 16; str.append(1, HEX[a]); str.append(1, HEX[b]); } return str;}/* Convert digest to string value */string MD5::toString() { return bytesToHexString(digest(), 16);}
❾ VS2013中c语言md5加密函数怎么调用
1、主要就是调用库函数，MD5加密说到底也是函数计算，没有什么思路的问题，了解md5的发明算法，本质是一个数学问题。
2、例程：
#ifndefMD5_H#defineMD5_Htypedefstruct{unsignedintcount[2];unsignedintstate[4];unsignedcharbuffer[64];}MD5_CTX;#defineF(x,y,z)((x&y)|(~x&z))#defineG(x,y,z)((x&z)|(y&~z))#defineH(x,y,z)(x^y^z)#defineI(x,y,z)(y^(x|~z))#defineROTATE_LEFT(x,n)((x<<n)|(x>>(32-n)))#defineFF(a,b,c,d,x,s,ac){a+=F(b,c,d)+x+ac;a=ROTATE_LEFT(a,s);a+=b;}#defineGG(a,b,c,d,x,s,ac){a+=G(b,c,d)+x+ac;a=ROTATE_LEFT(a,s);a+=b;}#defineHH(a,b,c,d,x,s,ac){a+=H(b,c,d)+x+ac;a=ROTATE_LEFT(a,s);a+=b;}#defineII(a,b,c,d,x,s,ac){a+=I(b,c,d)+x+ac;a=ROTATE_LEFT(a,s);a+=b;}voidMD5Init(MD5_CTX*context);voidMD5Update(MD5_CTX*context,unsignedchar*input,unsignedintinputlen);voidMD5Final(MD5_CTX*context,unsignedchardigest[16]);voidMD5Transform(unsignedintstate[4],unsignedcharblock[64]);voidMD5Encode(unsignedchar*output,unsignedint*input,unsignedintlen);voidMD5Decode(unsignedint*output,unsignedchar*input,unsignedintlen);#endif源文件md5.c#include<memory.h>#include"md5.h"unsignedcharPADDING[]={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};voidMD5Init(MD5_CTX*context){context->count[0]=0;context->count[1]=0;context->state[0]=0x67452301;context->state[1]=0xEFCDAB89;context->state[2]=0x98BADCFE;context->state[3]=0x10325476;}voidMD5Update(MD5_CTX*context,unsignedchar*input,unsignedintinputlen){unsignedinti=0,index=0,partlen=0;index=(context->count[0]>>3)&0x3F;partlen=64-index;context->count[0]+=inputlen<<3;if(context->count[0]<(inputlen<<3))context->count[1]++;context->count[1]+=inputlen>>29;if(inputlen>=partlen){memcpy(&context->buffer[index],input,partlen);MD5Transform(context->state,context->buffer);for(i=partlen;i+64<=inputlen;i+=64)MD5Transform(context->state,&input[i]);index=0;}else{i=0;}memcpy(&context->buffer[index],&input[i],inputlen-i);}voidMD5Final(MD5_CTX*context,unsignedchardigest[16]){unsignedintindex=0,padlen=0;unsignedcharbits[8];index=(context->count[0]>>3)&0x3F;padlen=(index<56)?(56-index):(120-index);MD5Encode(bits,context->count,8);MD5Update(context,PADDING,padlen);MD5Update(context,bits,8);MD5Encode(digest,context->state,16);}voidMD5Encode(unsignedchar*output,unsignedint*input,unsignedintlen){unsignedinti=0,j=0;while(j<len){output[j]=input[i]&0xFF;output[j+1]=(input[i]>>8)&0xFF;output[j+2]=(input[i]>>16)&0xFF;output[j+3]=(input[i]>>24)&0xFF;i++;j+=4;}}voidMD5Decode(unsignedint*output,unsignedchar*input,unsignedintlen){unsignedinti=0,j=0;while(j<len){output[i]=(input[j])|(input[j+1]<<8)|(input[j+2]<<16)|(input[j+3]<<24);i++;j+=4;}}voidMD5Transform(unsignedintstate[4],unsignedcharblock[64]){unsignedinta=state[0];unsignedintb=state[1];unsignedintc=state[2];unsignedintd=state[3];unsignedintx[64];MD5Decode(x,block,64);FF(a,b,c,d,x[0],7,0xd76aa478);/*1*/FF(d,a,b,c,x[1],12,0xe8c7b756);/*2*/FF(c,d,a,b,x[2],17,0x242070db);/*3*/FF(b,c,d,a,x[3],22,0xc1bdceee);/*4*/FF(a,b,c,d,x[4],7,0xf57c0faf);/*5*/FF(d,a,b,c,x[5],12,0x4787c62a);/*6*/FF(c,d,a,b,x[6],17,0xa8304613);/*7*/FF(b,c,d,a,x[7],22,0xfd469501);/*8*/FF(a,b,c,d,x[8],7,0x698098d8);/*9*/FF(d,a,b,c,x[9],12,0x8b44f7af);/*10*/FF(c,d,a,b,x[10],17,0xffff5bb1);/*11*/FF(b,c,d,a,x[11],22,0x895cd7be);/*12*/FF(a,b,c,d,x[12],7,0x6b901122);/*13*/FF(d,a,b,c,x[13],12,0xfd987193);/*14*/FF(c,d,a,b,x[14],17,0xa679438e);/*15*/FF(b,c,d,a,x[15],22,0x49b40821);/*16*/
❿ 求用c语言实现md5算法的编程思路
主要就是调用库函数MD5加密说到底也是函数计算没有什么思路的问题，了解md5的发明算法，这应该是一个数学问题我这里有代码，你可以参考一下#include <stdio.h> #include <stdlib.h> #include <time.h> #include <string.h> typedef unsigned char *POINTER; typedef unsigned short int UINT2; typedef unsigned long int UINT4; typedef struct { UINT4 state[4]; UINT4 count[2]; unsigned char buffer[64]; } MD5_CTX; void MD5Init(MD5_CTX *); void MD5Update(MD5_CTX *, unsigned char *, unsigned int); void MD5Final(unsigned char [16], MD5_CTX *); #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 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 }; #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))) #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n)))) #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); } #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); } inline void Encode(unsigned char *output, UINT4 *input, unsigned int len) { unsigned int i, j; for (i = 0, j = 0; j < len; i++, j += 4) { output[j] = (unsigned char)(input[i] & 0xff); output[j+1] = (unsigned char)((input[i] >> 8) & 0xff); output[j+2] = (unsigned char)((input[i] >> 16) & 0xff); output[j+3] = (unsigned char)((input[i] >> 24) & 0xff); } } inline void Decode(UINT4 *output, unsigned char *input, unsigned int len) { unsigned int i, j; for (i = 0, j = 0; j < len; i++, j += 4) output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) | (((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24); } inline void MD5Transform (UINT4 state[4], unsigned char block[64]) { UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16]; Decode (x, block, 64); FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */ FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */ FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */ FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */ FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */ FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */ FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */ FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */ FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */ FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */ FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */ FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */ FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */ FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */ FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */ FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */ GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */ GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */ GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */ GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */ GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */ GG (d, a, b, c, x[10], S22, 0x2441453); /* 22 */ GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */ GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */ GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */ GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */ GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */ GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */ GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */ GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */ GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */ GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */ HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */ HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */ HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */ HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */ HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */ HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */ HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */ HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */ HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */ HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */ HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */ HH (b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */ HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */ HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */ HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */ HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */ II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */ II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */ II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */ II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */ II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */ II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */ II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */ II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */ II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */ II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */ II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */ II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */ II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */ II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */ II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */ II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */ state[0] += a; state[1] += b; state[2] += c; state[3] += d; memset ((POINTER)x, 0, sizeof (x)); } inline void MD5Init(MD5_CTX *context) { context->count[0] = context->count[1] = 0; context->state[0] = 0x67452301; context->state[1] = 0xefcdab89; context->state[2] = 0x98badcfe; context->state[3] = 0x10325476; } inline void MD5Update(MD5_CTX *context, unsigned char *input, unsigned int inputLen) { unsigned int i, index, partLen; index = (unsigned int)((context->count[0] >> 3) & 0x3F); if ((context->count[0] += ((UINT4)inputLen << 3)) < ((UINT4)inputLen << 3)) context->count[1]++; context->count[1] += ((UINT4)inputLen >> 29); partLen = 64 – index; if (inputLen >= partLen) { memcpy((POINTER)&context->buffer[index], (POINTER)input, partLen); MD5Transform(context->state, context->buffer); for (i = partLen; i + 63 < inputLen; i += 64) MD5Transform (context->state, &input[i]); index = 0; } else i = 0; memcpy((POINTER)&context->buffer[index], (POINTER)&input[i], inputLen-i); } inline void MD5Final(unsigned char digest[16], MD5_CTX *context) { unsigned char bits[8]; unsigned int index, padLen; Encode (bits, context->count, 8); index = (unsigned int)((context->count[0] >> 3) & 0x3f); padLen = (index < 56) ? (56 – index) : (120 – index); MD5Update (context, PADDING, padLen); MD5Update (context, bits, 8); Encode (digest, context->state, 16); memset ((POINTER)context, 0, sizeof (*context)); } void MD5Digest(char *pszInput, unsigned long nInputSize, char *pszOutPut) { MD5_CTX context; unsigned int len = strlen (pszInput); MD5Init (&context); MD5Update (&context, (unsigned char *)pszInput, len); MD5Final ((unsigned char *)pszOutPut, &context); } main() { char szDigest[16]; char encrypt[200]; printf("请输入要计算MD5值的字符串:"); gets(encrypt); printf("\n加密结果:"); MD5Digest(encrypt,strlen(encrypt),szDigest); int i; for (i=0;i<16;i++) printf ("%02X",(unsigned char)szDigest[i]);getchar();}
