Question

能够在电子邮件中发送网址之前成功加密/解密我的网址，但在传递网址并检索网址后解密网址的加密部分时，无法正确解密。解密后会收到奇怪的字符，例如：

加密前的文字：

dkjkb7i8doprgeh521tbbdll9r-Sat Apr 12 17:21:01 EEST 2014

我的文字：

decryption:ziUO5baLOpFaOfWBtMOLhrRBR2ucXnxFHbA2KoRUVVQst6oDqUrGIU04qey4xU6haNvyp18+BROzadH6MXNxKA==

发送url后的URL解密，发送url后的解密文本：

dkjkb7i8doprgeh521tbbdll9r-Sat Apr 12 17:21:01 **E[???xno**

这是我用于加密，解密的DES类：

package com;

import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class DESEncryption {

    private static final String UNICODE_FORMAT = "UTF8";
    public static final String DES_ENCRYPTION_SCHEME = "DES";
    private KeySpec myKeySpec;
    private SecretKeyFactory mySecretKeyFactory;
    private Cipher cipher;
    byte[] keyAsBytes;
    private String myEncryptionKey;
    private String myEncryptionScheme;
    SecretKey key;

    public DESEncryption() throws Exception {
        myEncryptionKey = "ThisIsSecretEncryptionKey";
        myEncryptionScheme = DES_ENCRYPTION_SCHEME;
        keyAsBytes = myEncryptionKey.getBytes(UNICODE_FORMAT);
        myKeySpec = new DESKeySpec(keyAsBytes);
        mySecretKeyFactory = SecretKeyFactory.getInstance(myEncryptionScheme);
        cipher = Cipher.getInstance(myEncryptionScheme);
        key = mySecretKeyFactory.generateSecret(myKeySpec);
    }

    /**
     * Method To Encrypt The String
     */
    public String encrypt(String unencryptedString) {
        String encryptedString = null;
        try {
            cipher.init(Cipher.ENCRYPT_MODE, key);
            byte[] plainText = unencryptedString.getBytes(UNICODE_FORMAT);
            byte[] encryptedText = cipher.doFinal(plainText);
            BASE64Encoder base64encoder = new BASE64Encoder();
            encryptedString = base64encoder.encode(encryptedText);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return encryptedString;
    }

    /**
     * Method To Decrypt An Ecrypted String
     */
    public String decrypt(String encryptedString) {
        String decryptedText = null;
        try {
            cipher.init(Cipher.DECRYPT_MODE, key);
            BASE64Decoder base64decoder = new BASE64Decoder();
            byte[] encryptedText = base64decoder.decodeBuffer(encryptedString);
            byte[] plainText = cipher.doFinal(encryptedText);
            decryptedText = bytes2String(plainText);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return decryptedText;
    }

    /**
     * Returns String From An Array Of Bytes
     */
    private static String bytes2String(byte[] bytes) {
        StringBuffer stringBuffer = new StringBuffer();

        for (int i = 0; i < bytes.length; i++) {
            stringBuffer.append((char) bytes[i]);
        }
        return stringBuffer.toString();
    }

}

Answer 1

Base 64使用/和+个字符。您需要执行以下任一操作：

对您的base 64字符串进行URL编码;
使用对网址安全的base 64 variant。

第一个更容易编码，但可能效率低于第二个（如果编码中有许多/和+个字符。）

请注意，您可以使用简单的字符串替换来使用＃2，因此。

使用DES进行URL解密错误

1 个答案: