RSA

JAVA

import org.apache.commons.codec.binary.Base64;
import javax.crypto.Cipher;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.HashMap;
import java.util.Map;
public class Pass {
    public static void main(String[] args) throws Exception {
        // 生成 私钥及公钥 key
        genKeyPair();

        // 加密
        String publicKey = keyMap.get(0);
        String str = "g-bill@bineanshi";
        System.out.println("原数据："+ str);
        String result = encrypt(str,publicKey);
        System.out.println("加密数据：" + result);

        // 解密
        String privateKey = keyMap.get(1);
        String a_result = decrypt(result,privateKey);
        System.out.println("解密数据：" + a_result);
    }

    private static Map<Integer, String> keyMap = new HashMap<Integer, String>();

    public static void genKeyPair() throws NoSuchAlgorithmException {
        // KeyPairGenerator类用于生成公钥和私钥对，基于RSA算法生成对象
        KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("RSA");
        // 初始化密钥对生成器，密钥大小为96-1024位
        SecureRandom k = new SecureRandom();
        keyPairGen.initialize(1024,k);
        // 生成一个密钥对，保存在keyPair中
        KeyPair keyPair = keyPairGen.generateKeyPair();
        RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();   // 得到私钥

        RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();  // 得到公钥
        // System.out.println(publicKey);
        String publicKeyString = new String(Base64.encodeBase64(publicKey.getEncoded()));
        // 得到私钥字符串
        String privateKeyString = new String(Base64.encodeBase64((privateKey.getEncoded())));
        // 将公钥和私钥保存到Map
        keyMap.put(0,publicKeyString);  //0表示公钥
        keyMap.put(1,privateKeyString);  //1表示私钥

        System.out.println("公钥：(" + publicKeyString.length() + ") " + publicKeyString);
        System.out.println("私钥：(" + privateKeyString.length() + ") " + privateKeyString);
    }
    public static String encrypt( String str, String publicKey ) throws Exception{
        //base64编码的公钥
        byte[] decoded = Base64.decodeBase64(publicKey);
        //Check converted string against original String
        RSAPublicKey pubKey = (RSAPublicKey) KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(decoded));
        //RSA加密
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.ENCRYPT_MODE, pubKey);
        String outStr = Base64.encodeBase64String(cipher.doFinal(str.getBytes("UTF-8")));
        return outStr;
    }
    public static String decrypt(String str, String privateKey) throws Exception{
        //64位解码加密后的字符串
        byte[] inputByte = Base64.decodeBase64(str.getBytes("UTF-8"));
        //base64编码的私钥
        byte[] decoded = Base64.decodeBase64(privateKey);
        RSAPrivateKey priKey = (RSAPrivateKey) KeyFactory.getInstance("RSA").generatePrivate(new PKCS8EncodedKeySpec(decoded));
        //RSA解密
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.DECRYPT_MODE, priKey);
        String outStr = new String(cipher.doFinal(inputByte));
        return outStr;
    }
}

Ruby

require 'openssl'
require 'base64'
require 'openssl_pkcs8_pure'

# 创建密钥
k = OpenSSL::PKey::RSA.new(1024)

# 公钥加密
publicKey = k.public_key.to_s.gsub("\n",'').match('-----BEGIN PUBLIC KEY-----(.*?)-----END PUBLIC KEY-----')[1]
pri = OpenSSL::PKey::RSA.new(Base64.strict_decode64 publicKey)
result = Base64.strict_encode64(pri.public_encrypt('g-bill@bineanshi'))

puts result

# 私钥解密
privateKey = k.to_pem.gsub("\n",'').match('-----BEGIN RSA PRIVATE KEY-----(.*?)-----END RSA PRIVATE KEY-----')[1]
# Java 使用的 PKCS8 格式
# java_privateKey = k.to_pem_pkcs8.gsub("\n",'').match('-----BEGIN PRIVATE KEY-----(.*?)-----END PRIVATE KEY-----')[1]
sri = OpenSSL::PKey::RSA.new(Base64.strict_decode64 privateKey)
puts sri.private_decrypt(Base64.decode64(result))