rsa 加密传输

后端代码：

　　

package com.xxx.common.utils.sign;
import org.apache.commons.codec.binary.Base64;
import javax.crypto.Cipher;
import java.security.*;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;

/**
 * RSA加密解密
 *
 * @author userName
 **/
public class RsaUtils
{
    // Rsa 私钥
    public static String privateKey6 = "MIIBVAIBADANBgkqhkiG9w0BAQEFAASCAT4wggE6AgEAAkEAqhHyZfSsYourNxaY"
            + "7Nt+PrgrxkiA50efORdI5U5lsW79MmFnusUA355oaSXcLhu5xxB38SMSyP2KvuKN"
            + "PuH3owIDAQABAkAfoiLyL+Z4lf4Myxk6xUDgLaWGximj20CUf+5BKKnlrK+Ed8gA"
            + "kM0HqoTt2UZwA5E2MzS4EI2gjfQhz5X28uqxAiEA3wNFxfrCZlSZHb0gn2zDpWow"
            + "cSxQAgiCstxGUoOqlW8CIQDDOerGKH5OmCJ4Z21v+F25WaHYPxCFMvwxpcw99Ecv"
            + "DQIgIdhDTIqD2jfYjPTY8Jj3EDGPbH2HHuffvflECt3Ek60CIQCFRlCkHpi7hthh"
            + "YhovyloRYsM+IS9h/0BzlEAuO0ktMQIgSPT3aFAgJYwKpqRYKlLDVcflZFCKY7u3"
            + "UP8iWi1Qw0Y=";

    // Rsa 私钥
    public static String  privateKey = "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";
    /**
     * 私钥解密
     *
     * @param text 待解密的文本
     * @return 解密后的文本
     */
    public static String decryptByPrivateKey(String text) throws Exception
    {
        return decryptByPrivateKey(privateKey, text);
    }

    /**
     * 公钥解密
     *
     * @param publicKeyString 公钥
     * @param text 待解密的信息
     * @return 解密后的文本
     */
    public static String decryptByPublicKey(String publicKeyString, String text) throws Exception
    {
        X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(Base64.decodeBase64(publicKeyString));
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec);
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.DECRYPT_MODE, publicKey);
        byte[] result = cipher.doFinal(Base64.decodeBase64(text));
        return new String(result);
    }

    /**
     * 私钥加密
     *
     * @param privateKeyString 私钥
     * @param text 待加密的信息
     * @return 加密后的文本
     */
    public static String encryptByPrivateKey(String privateKeyString, String text) throws Exception
    {
        PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(Base64.decodeBase64(privateKeyString));
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec);
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.ENCRYPT_MODE, privateKey);
        byte[] result = cipher.doFinal(text.getBytes());
        return Base64.encodeBase64String(result);
    }

    /**
     * 私钥解密
     *
     * @param privateKeyString 私钥
     * @param text 待解密的文本
     * @return 解密后的文本
     */
    public static String decryptByPrivateKey(String privateKeyString, String text) throws Exception
    {
        PKCS8EncodedKeySpec pkcs8EncodedKeySpec5 = new PKCS8EncodedKeySpec(Base64.decodeBase64(privateKeyString));
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec5);
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        byte[] result = cipher.doFinal(Base64.decodeBase64(text));
        return new String(result);
    }

    /**
     * 公钥加密
     *
     * @param publicKeyString 公钥
     * @param text 待加密的文本
     * @return 加密后的文本
     */
    public static String encryptByPublicKey(String publicKeyString, String text) throws Exception
    {
        X509EncodedKeySpec x509EncodedKeySpec2 = new X509EncodedKeySpec(Base64.decodeBase64(publicKeyString));
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec2);
        Cipher cipher = Cipher.getInstance("RSA");
        cipher.init(Cipher.ENCRYPT_MODE, publicKey);
        byte[] result = cipher.doFinal(text.getBytes());
        return Base64.encodeBase64String(result);
    }

    /**
     * 构建RSA密钥对
     *
     * @return 生成后的公私钥信息
     */
    public static RsaKeyPair generateKeyPair() throws NoSuchAlgorithmException
    {
        KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
        keyPairGenerator.initialize(1024);
        KeyPair keyPair = keyPairGenerator.generateKeyPair();
        RSAPublicKey rsaPublicKey = (RSAPublicKey) keyPair.getPublic();
        RSAPrivateKey rsaPrivateKey = (RSAPrivateKey) keyPair.getPrivate();
        String publicKeyString = Base64.encodeBase64String(rsaPublicKey.getEncoded());
        String privateKeyString = Base64.encodeBase64String(rsaPrivateKey.getEncoded());
        return new RsaKeyPair(publicKeyString, privateKeyString);
    }

    /**
     * RSA密钥对对象
     */
    public static class RsaKeyPair
    {
        private final String publicKey;
        private final String privateKey;

        public RsaKeyPair(String publicKey, String privateKey)
        {
            this.publicKey = publicKey;
            this.privateKey = privateKey;
        }

        public String getPublicKey()
        {
            return publicKey;
        }

        public String getPrivateKey()
        {
            return privateKey;
        }
    }
}

 

前端代码：

  #共钥由后端提供

  var publickey = "---";

  var encrypt = new JSEncrypt();

  encrypt.setPublicKey(publickey)

  password = encrypt.encrypt(password);