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liusheng

8 天以前 c111e3eff1191b29d2d2baf2f485a4bf3a2edc00

 ruoyi-common/src/main/java/com/ruoyi/common/utils/RSAPublicKeyExample.java

@@ -20,71 +20,58 @@
public class RSAPublicKeyExample {


    /**
     * 数据解密
     *
     * @param encryptedData
     * @return
     */
    public String decryptedData(String encryptedData, String pri_key) {
        String privateKeyString = "私钥的Base64编码字符串"; // 后端私钥的Base64编码字符串

    public static String encryptedData(String plainText, String pubKey) {
        try {
            // 将私钥Base64编码字符串转换为PrivateKey对象
            byte[] privateKeyBytes = Base64.getDecoder().decode(pri_key);
            PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(privateKeyBytes);
            KeyFactory keyFactory = KeyFactory.getInstance("RSA");
            PrivateKey privateKey = keyFactory.generatePrivate(keySpec);

            // 使用私钥解密数据
            Cipher decryptCipher = Cipher.getInstance("RSA");
            decryptCipher.init(Cipher.DECRYPT_MODE, privateKey);
            byte[] decryptedBytes = decryptCipher.doFinal(Base64.getDecoder().decode(encryptedData));

            // 解密后的数据
            String decryptedData = new String(decryptedBytes);
            System.out.println("解密后的数据：" + decryptedData);
            return decryptedData;
        } catch (Exception e) {
            log.error("解密报错了:{}", e.getMessage());
        }
        return null;
    }

    /**
     * 要加密的明文数据
     *
     * @param plainText
     * @return
     */
    public String encryptedData(String plainText, String pub_key) {
        log.error("需要加密的数据：{}", plainText);
        try {

            byte[] publicKeyBytes = Base64.getDecoder().decode(pub_key);
            byte[] publicKeyBytes = Base64.getDecoder().decode(pubKey);
            X509EncodedKeySpec keySpec = new X509EncodedKeySpec(publicKeyBytes);
            KeyFactory keyFactory = KeyFactory.getInstance("RSA");
            PublicKey publicKey = keyFactory.generatePublic(keySpec);

            // 使用公钥加密数据
            Cipher encryptCipher = Cipher.getInstance("RSA");
            encryptCipher.init(Cipher.ENCRYPT_MODE, publicKey);
            byte[] encryptedBytes = encryptCipher.doFinal(plainText.getBytes());
            Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
            cipher.init(Cipher.ENCRYPT_MODE, publicKey);
            byte[] encryptedBytes = cipher.doFinal(plainText.getBytes(StandardCharsets.UTF_8));

            // 将加密后的数据转换为Base64编码的字符串
            // Base64 编码（必须保留）
            String encryptedText = Base64.getEncoder().encodeToString(encryptedBytes);
            log.error("Base64加密后的数据：{}", encryptedText);
            encryptedText = URLEncoder.encode(encryptedText, StandardCharsets.UTF_8.toString());
            log.error("URLEncoder编码后的数据：{}", encryptedText);
            String decodedString = URLDecoder.decode(encryptedText, "UTF-8");
            log.error("URLEncoder解码后的数据：{}", decodedString);
            return encryptedText;

            // 可选：如果用于 URL 传输，再进行 URL 编码
            return URLEncoder.encode(encryptedText, StandardCharsets.UTF_8.toString());
        } catch (Exception e) {
            log.error("加密失败了:{}", e.getMessage());
            System.err.println("加密失败: " + e.getMessage());
            e.printStackTrace();
            return null;
        }
        return null;
    }

    /**
     * RSA 私钥解密（解密 Base64 编码后的密文，支持 URL 解码）
     */
    public static String decryptedData(String encryptedData, String priKey) {
        try {
            // 可选：先 URL 解码（如果加密前做了 URLEncoder）
            String base64Encrypted = URLDecoder.decode(encryptedData, StandardCharsets.UTF_8.toString());

            // Base64 解码
            byte[] encryptedBytes = Base64.getDecoder().decode(base64Encrypted);

            byte[] privateKeyBytes = Base64.getDecoder().decode(priKey);
            PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(privateKeyBytes);
            KeyFactory keyFactory = KeyFactory.getInstance("RSA");
            PrivateKey privateKey = keyFactory.generatePrivate(keySpec);

            Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
            cipher.init(Cipher.DECRYPT_MODE, privateKey);
            byte[] decryptedBytes = cipher.doFinal(encryptedBytes);

            return new String(decryptedBytes, StandardCharsets.UTF_8);
        } catch (Exception e) {
            System.err.println("解密失败: " + e.getMessage());
            e.printStackTrace();
            return null;
        }
    }


    public static void main(String[] args) {
        String decodedString = null;
        try {