Tea加密算法实现.doc

《Tea加密算法实现.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Tea加密算法实现源程序：#include#includevoidencrypt(unsignedlong*v1,unsignedlong*v2,unsignedlong*k);/*加密函数定义*/voiddecrypt(unsignedlong*v1,unsignedlong*v2,unsignedlong*k);/*解密函数定义*/unsignedlong*key=(unsignedlong*)"abcde";/*常量密钥*/voidmain(){c

2、haror[32],de[32];inti,j,k;unsignedlong*y1,*y2;printf("常量密钥：%s",(char*)key);printf("请输入源串，长度小于或等于32个英文字符:");scanf("%s",or);j=strlen(or);for(i=j;i<32;i++)or[i]='';for(i=0;i<32;i++)de[i]=or[i];for(i=0;i<32;i+=8){y1=(unsignedlong*)&de[i];y2=(unsigned

3、long*)&de[i+4];encrypt(y1,y2,key);/*加密*/}printf("密文:");for(i=0;i<32;i++)printf("%2x",(unsignedchar)de[i]);printf("");for(i=0;i<32;i+=8){y1=(unsignedlong*)&de[i];y2=(unsignedlong*)&de[i+4];decrypt(y1,y2,key);/*解密*/}printf("解密后：");for(i=0;i<32;i++)pr

4、intf("%2x",(unsignedchar)de[i]);printf("解密后的密钥：%s",de);}voidencrypt(unsignedlong*v1,unsignedlong*v2,unsignedlong*k){unsignedlongy=*v1,z=*v2,sum=0,i;unsignedlongdelta=0x9e3779b9;unsignedlonga=k[0],b=k[1],c=k[2],d=k[3];for(i=0;i<32;i++){sum+=delta;

5、y+=((z<<4)+a)^(z+sum)^((z>>5)+b);z+=((y<<4)+c)^(y+sum)^((y>>5)+d);}*v1=y;*v2=z;}voiddecrypt(unsignedlong*v1,unsignedlong*v2,unsignedlong*k){unsignedlongy=*v1,z=*v2,sum=0xC6EF3720,i;unsignedlongdelta=0x9e3779b9;unsignedlonga=k[0],b=k[1],c=k[2],d=k[3];

6、for(i=0;i<32;i++){z-=((y<<4)+c)^(y+sum)^((y>>5)+d);y-=((z<<4)+a)^(z+sum)^((z>>5)+b);sum-=delta;}*v1=y;*v2=z;}程序运行结果：工程硕士96罗振一