小编jen*_*ith的帖子

这是运行我的编码和解码类时遇到的错误。

javax.crypto.BadPaddingException: Decryption error
    at sun.security.rsa.RSAPadding.unpadV15(RSAPadding.java:380)
    at sun.security.rsa.RSAPadding.unpad(RSAPadding.java:291)
    at com.sun.crypto.provider.RSACipher.doFinal(RSACipher.java:365)
    at com.sun.crypto.provider.RSACipher.engineDoFinal(RSACipher.java:391)
    at javax.crypto.Cipher.doFinal(Cipher.java:2087)
    at RSAEncDecDemo.decryptData(RSAEncDecDemo.java:64)
    at RSAEncDecDemo.main(RSAEncDecDemo.java:47)
java.lang.NullPointerException
    at java.lang.String.<init>(String.java:556)
    at RSAEncDecDemo.decryptData(RSAEncDecDemo.java:70)
    at RSAEncDecDemo.main(RSAEncDecDemo.java:47)

这是 RSAEncDecDemo.java 类文件的源代码。

public class RSAEncDecDemo {

    private static final String PUBLIC_KEY_FILE = "lk.public.key";
    private static final String PRIVATE_KEY_FILE = "lk.private.key";

    @SuppressWarnings("restriction")
    public static void main(String[] args) throws IOException {

        try {
            KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
            keyPairGenerator.initialize(2048);
            KeyPair keyPair = keyPairGenerator.generateKeyPair();
            PublicKey publicKey = keyPair.getPublic();
            PrivateKey privateKey = keyPair.getPrivate();

            writeStringkey(PUBLIC_KEY_FILE,new BASE64Encoder().encode(publicKey.getEncoded()));
            writeStringkey(PRIVATE_KEY_FILE,new BASE64Encoder().encode(privateKey.getEncoded()));

            String demoString …