使用支付宝SDK进行RSAj加签验签以及加密解密

背景

支付宝开元SDK中提供了RSA工具类，可以方便的对数据进行加解密，经测试演示版本sdk支持分段加解密，并且提供了加签与验签的常用方法。并支持RSA与RSA2两种类的签名类型。

注：生产RSA签名请参考 https://docs.open.alipay.com/291/105971

Maven 支付宝SDK依赖

注：maven中央库直达连接 https://mvnrepository.com/artifact/com.alipay.sdk/alipay-sdk-java

 <dependency>
            <groupId>com.alipay.sdk</groupId>
            <artifactId>alipay-sdk-java</artifactId>
            <version>3.7.4.ALL</version>
  </dependency>

RSA普通加密解密示例

1.调用 AlipaySignature.rsaEncrypt() 方法加密
2.调用 AlipaySignature.rsaDecrypt() 方法解密

public static void main(String[] args) throws Exception {

        //公钥
        String publicKey = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDp9FaWlZc/doHX" +
                "il60NcJB56trQOoYSMx5LUgBr+rGANJNBJvUJOI3Jqfs5axf4Lx/JqlhGcmlBuNE" +
                "gt16iEwwBLj6GSpHIm+qZ/bT1xHqJqJzS55PUu6JNhZsV6ERz/tvs3dITuTa0zxT" +
                "CSX4c9DniIF0VuWCLgEvRVuI2pqBYQIDAQAB";

        //私钥
        String privateKey = "MIICdgIBADANBgkqhkiG9w0BAQEFAASCAmAwggJcAgEAAoGBAOn0VpaVlz92gdeK" +
                "XrQ1wkHnq2tA6hhIzHktSAGv6sYA0k0Em9Qk4jcmp+zlrF/gvH8mqWEZyaUG40SC" +
                "3XqITDAEuPoZKkcib6pn9tPXEeomonNLnk9S7ok2FmxXoRHP+2+zd0hO5NrTPFMJ" +
                "Jfhz0OeIgXRW5YIuAS9FW4jamoFhAgMBAAECgYBS+Rg4gcdJd7MnCWj7CtHhY9OU" +
                "z0n24OK720ZdatGd9a6gKBFIFOix3KDT0MTooCDaC5Eo4ed1AtNZefwot+wksf2R" +
                "dXgoAf/uS1GpxbzXhzFHmfDBOf7yKRXm4K/xzVWu7+1DI2siGwuQ6GWfyhZlGCgj" +
                "DASHmSYOAidG8t6KQQJBAPeotqqoY0Q7yICWyRbJIVgtABRxSR6xE+4fGjHev219" +
                "pYopK7r0KRQsyAgHsFoFwzx9Rzr8YG85LBQ7lAeenzkCQQDx1XchnIRRuAl5f9EL" +
                "QuZjz8orT08nKhrM2aNswfmY5UC7amJPvPSZihYGO+V75NBGii6glG1Fskp+o4Hb" +
                "kctpAkA/DChUkcGToVSNx9Uxg8qFVA9tJNnkglf8itZ0U6yQByiZX5nOYlIC3NOf" +
                "l7WBdW4afBoiHhW+uuNJ01EAD5WhAkANBpx2GQIfjLQl8TaHTsEuGyEemBUBXQk4" +
                "g3iEASa6j46fCanl9Z2PL5rkFxHTTI3TXtoIGDaSjHnqvE/gTcgRAkEA92TtlNrc" +
                "VMm7ZkXz26YXkJ5dLDAFB7X8GxZU7DBJ3nFU8Ezj3V5y+5ka494A7/8WVYZUpnm9" +
                "KspvMmNNK4l/lQ==";


        String content = "123456";

        //公钥-加密
        String rsaEncrypt = AlipaySignature.rsaEncrypt(content, publicKey, "UTF-8");
        //私钥-解密
        String rsaDecrypt = AlipaySignature.rsaDecrypt(rsaEncrypt, privateKey, "UTF-8");

        System.out.println("加密前长度 ：" + content.length());
        System.out.println("加密后 ：" + rsaEncrypt);
        System.out.println("解密后 ：" + rsaDecrypt);
        System.out.println("解密后长度 ：" + rsaDecrypt.length());
    }

结果

RSA加签验签示例

/**
 * 支付宝 sdk 加签验签测试
 *
 * @author 码农猿
 */
public class SignDemo {

    /**
     * 公钥
     */
    private static final String PUBLIC_KEY = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnLbS4NKB4K6lSwAruObksqJpcrs7t8w51Y38I9ix9r7WCBMiAjRxWu8DNnr2t5ya/XXoioHqyMH3oEkiqsUh3FX1pG/4N/9/hRtFDJqpkCo4Z/D76wEehY+y+k8sGEO+dO8m8bNbmfpcIGDwuPl3qVBFeyJQwPguuWd32/xtzLcYk2C/Eec25++ElHobGvLkRTHHlXeZ+v8IYCIPd058bQssnFMw7nn+Lgr2kQK/2gPQ8gXs8mi1712i/dgoo8bzw9mhzkFnWXExRqzgoXH5DfIMWnlRR4l1u2qXXPU+hIKFua2776qHREmeqPkKiHA2zoMc9LVydVDTGovJjSn00wIDAQAB";

    /**
     * 私钥
     */
    private static final String PRIVATE_KEY = "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";

    /**
     * 字符集
     */
    private static final String CHAR_SET = "UTF-8";
    /**
     * 签名类型  RSA 或 RSA2
     */
    private static final String SIGN_TYPE = "RSA2";


    public static void main(String[] args) {

        //创建参数
        Map<String, String> paramMap = new HashMap<String, String>();
        paramMap.put("params1", "value..1..");
        paramMap.put("params2", "value..2..");
        paramMap.put("params3", "value..3..");
        paramMap.put("params4", "value..4..");

        try {

            //拼接待加签的字符串
            String content = AlipaySignature.getSignContent(paramMap);

            //私钥-对数据加签
            String sign = AlipaySignature.rsaSign(content, PRIVATE_KEY, CHAR_SET, SIGN_TYPE);

            //添加签名到参数
            paramMap.put("sign", sign);

            //公钥-对数据验签
            boolean result = AlipaySignature.rsaCheckV1(paramMap, PUBLIC_KEY, CHAR_SET, SIGN_TYPE);

            System.out.println("签名类型 : " + SIGN_TYPE + " 编码规则: " + CHAR_SET);
            System.out.println("拼接待加签的字符串 : " + content);
            System.out.println("当前签名 : " + sign);
            System.out.println("验签结果 : " + result);

        } catch (AlipayApiException e) {
            e.printStackTrace();
        }
    }

}

RSA与RSA2

以下介绍来自支付宝开放平台