Java如何实现RSA算法
小编给大家分享一下Java如何实现RSA算法,相信大部分人都还不怎么了解,因此分享这篇文章给大家参考一下,希望大家阅读完这篇文章后大有收获,下面让我们一起去了解一下吧!
我们提供的服务有:网站建设、网站制作、微信公众号开发、网站优化、网站认证、龙州ssl等。为成百上千家企事业单位解决了网站和推广的问题。提供周到的售前咨询和贴心的售后服务,是有科学管理、有技术的龙州网站制作公司
以下是引用片段: package rsa; import java.math.BigInteger; public class RSA { private long p,q,e,d,n; public RSA(){ int pIndex = (int)(Math.random()*10); int qIndex; int eIndex; do{ qIndex = (int)(Math.random()*10); } while(qIndex==pIndex); do{ eIndex = (int)(Math.random()*10); } while(eIndex==pIndex||eIndex==pIndex); p = 1033; q = 2017; e = 29437; n = p*q; d = calculateD(); } private long calculateD(){ long t0 = 0,t1 = 1,t2 = -1; long r0 = (p-1)*(q-1), m = r0,r1 = e ,r2 = -1; do{ long q = r0/r1; r2 = r0-r1*q; if(r2==0)break; t2 = t0 - t1*q; while(t2<0){ t2+=m; } if(t2>=m){ t2 %= m; } r0 = r1; r1 = r2; t0 = t1; t1 = t2; }while(r2!=0); if(r1!=1){ return 0; } else{ return t2; } } public long getE() { return e; } public long getN() { return n; } public long getD() { return d; } public BigInteger encode(BigInteger data){ return pow(data,d).mod(new BigInteger(n+"")); } public BigInteger decode(BigInteger code){ return pow(code,e).mod(new BigInteger(n+"")); } public BigInteger pow(BigInteger data,long p){ data = data.pow((int)p); return data; } public static void main(String args[]){ RSA rsa = new RSA(); BigInteger data = new BigInteger("222222"); long oldtime = System.currentTimeMillis(); BigInteger code = rsa.encode(data); long newtime = System.currentTimeMillis(); double codetime = ((double)(newtime-oldtime))/1000; oldtime = System.currentTimeMillis(); BigInteger decode = rsa.decode(code); newtime = System.currentTimeMillis(); double decodetime = ((double)(newtime-oldtime))/1000; System.out.println("privateKey:"+rsa.d); System.out.println("publickKey:"+rsa.e); System.out.println("N:"+rsa.n); System.out.println("data:"+data); System.out.println("code:"+code+" time:"+codetime); System.out.println("decode:"+decode+" time:"+decodetime); } } |
以上是“Java如何实现RSA算法”这篇文章的所有内容,感谢各位的阅读!相信大家都有了一定的了解,希望分享的内容对大家有所帮助,如果还想学习更多知识,欢迎关注创新互联行业资讯频道!
当前题目:Java如何实现RSA算法
文章来源:http://scyanting.com/article/ghjies.html