centos平台

md5.c

#include 
    
     #include 
     
      #include 
      
       //#include "../e_os.h"#include 
       
        #include 
        
         static char *hex2str(unsigned char *md){    int i;    static char buf[80];    for (i = 0; i < MD5_DIGEST_LENGTH; i++)        sprintf(&(buf[i * 2]), "%02x", md[i]);    return (buf);}int main(){	unsigned char md5Result[MD5_DIGEST_LENGTH];		char *source = "000000";		char *p;		if (!EVP_Digest(source, strlen(source), md5Result, NULL, EVP_md5(),NULL)){		fprintf(stderr,"err");		return -1;	}	p = hex2str(md5Result);		printf("md5(%s)=%s\n",source,p);	return 0;	}
        
       
      
     
    

makefile

CC=gccCFLAGS=-Wall -g CINC=-I. -I/home/liuyi/openssl/include LIBS=-L/home/liuyi/openssl/lib LDFLAGS=-lcrypto -lsslTARGET=md5OBJ=md5.oall:$(TARGET)$(TARGET):      $(OBJ) 	$(CC) $(CFLAGS) -o $@ $(OBJ) $(LIBS)  $(LDFLAGS).c.o:	$(CC) -c  $(CFLAGS) $(CINC) $

LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/liuyi/openssl/lib

export LD_LIBRARY_PATH

./md5