-----------rsa加密生成公钥私钥----------

vqt2prt15 2014-02-12 04:38:31



public class rsa {  

      

    public static void main(String[] args) {  

        try {  

            int keySize = 1024;  

            java.security.KeyPairGenerator pairgen = java.security.KeyPairGenerator.getInstance("rsa");  

            

            java.security.SecureRandom random = new java.security.SecureRandom();  

            random.setSeed("abcd".getBytes());  

            pairgen.initialize(keySize, random);  

            java.security.KeyPair keyPair = pairgen.generateKeyPair();  

            // publicKey  

            java.security.interfaces.RSAPublicKey publicKey = (java.security.interfaces.RSAPublicKey)keyPair.getPublic();         

            System.out.println("publicKey modulus:    " + publicKey.getModulus().toString(16));  

            System.out.println("publicKey publicExponent:    " + publicKey.getPublicExponent().toString(16));  

            // privateKey  

            java.security.interfaces.RSAPrivateKey privateKey = (java.security.interfaces.RSAPrivateKey)keyPair.getPrivate();  

            System.out.println("privateKey modulus:    " + privateKey.getModulus().toString(16));  

            System.out.println("privateKey privateExponent:    " + privateKey.getPrivateExponent().toString(16));  

        } catch (java.security.NoSuchAlgorithmException e) {  

            e.printStackTrace();  

        }  

    }  

}  

//输出

publicKey modulus:    9a986008646f78d2763692da976c479e81b4e6c21d2a7669d39cc95ec26b1f82afe0724dc95933d67e3c800e27768a16592b42bd6039845db5d3ea7f993d64cdc5e736a149f0133b225b26bda65ca19c39af287da178cb43b7815351b3923dc1ff8ff994cc91dd9702100c084062a476aeae9614a68b3a58f5ee41ec2c9e4537

publicKey publicExponent:    10001  //问题 它16进制每次都不变 这个值能不能变

privateKey modulus:    9a986008646f78d2763692da976c479e81b4e6c21d2a7669d39cc95ec26b1f82afe0724dc95933d67e3c800e27768a16592b42bd6039845db5d3ea7f993d64cdc5e736a149f0133b225b26bda65ca19c39af287da178cb43b7815351b3923dc1ff8ff994cc91dd9702100c084062a476aeae9614a68b3a58f5ee41ec2c9e4537

privateKey privateExponent:    4dcab33845e1d9f87dc7c469fe9c5c05a4db34eb24e603240979f1d29f1e6c82c4a1baa2edd8d73eedd2dfd53f8264c60e24b8b6b6befa9e752aa7eb815ee563e509960dd0c3460f2361f2f054808353d9f6936d3429cbf738687ecf2fdd2cda4dd48362d281f516e79fbfb487ccf5ed6929972bc94041fe9f778d3e6e6bd3a1