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  • aes 解密出现 java.lang.NumberFormatException: Invalid int: "ch"

    原因:

    将加密/解密的seed 和 加密内容顺序放反.  decrypt(String seed, String encrypted)

    附上AES解密/加密代码(android开发):

    package com.carspeak.client.util;
    
    import java.io.UnsupportedEncodingException;
    import java.security.InvalidKeyException;
    import java.security.NoSuchAlgorithmException;
    import java.security.SecureRandom;
    
    import javax.crypto.BadPaddingException;
    import javax.crypto.Cipher;
    import javax.crypto.IllegalBlockSizeException;
    import javax.crypto.KeyGenerator;
    import javax.crypto.NoSuchPaddingException;
    import javax.crypto.SecretKey;
    import javax.crypto.spec.IvParameterSpec;
    import javax.crypto.spec.SecretKeySpec;
    
    /**
     * AES 加密解密
     * 
     * @author huqiang
     * 
     */
    public class AESUtil {
    
        public static String encrypt(String seed, String cleartext)
                throws Exception {
            byte[] rawKey = getRawKey(seed.getBytes());
            byte[] result = encrypt(rawKey, cleartext.getBytes());
            return toHex(result);
        }
    
        public static String decrypt(String seed, String encrypted)
                throws Exception {
            byte[] rawKey = getRawKey(seed.getBytes());
            byte[] enc = toByte(encrypted);
            byte[] result = decrypt(rawKey, enc);
            return new String(result);
        }
    
        private static byte[] getRawKey(byte[] seed) throws Exception {
            KeyGenerator kgen = KeyGenerator.getInstance("AES");
            SecureRandom sr = SecureRandom.getInstance("SHA1PRNG", "Crypto");
            sr.setSeed(seed);
            kgen.init(128, sr); // 192 and 256 bits may not be available
            SecretKey skey = kgen.generateKey();
            byte[] raw = skey.getEncoded();
            return raw;
        }
    
        private static byte[] encrypt(byte[] raw, byte[] clear) throws Exception {
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance("AES");
            cipher.init(Cipher.ENCRYPT_MODE, skeySpec, new IvParameterSpec(
                    new byte[cipher.getBlockSize()]));
            byte[] encrypted = cipher.doFinal(clear);
            return encrypted;
        }
    
        private static byte[] decrypt(byte[] raw, byte[] encrypted)
                throws Exception {
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance("AES");
            cipher.init(Cipher.DECRYPT_MODE, skeySpec, new IvParameterSpec(
                    new byte[cipher.getBlockSize()]));
            byte[] decrypted = cipher.doFinal(encrypted);
            return decrypted;
        }
    
        private static String toHex(String txt) {
            return toHex(txt.getBytes());
        }
    
        private static String fromHex(String hex) {
            return new String(toByte(hex));
        }
    
        private static byte[] toByte(String hexString) {
            int len = hexString.length() / 2;
            byte[] result = new byte[len];
            for (int i = 0; i < len; i++)
                result[i] = Integer.valueOf(hexString.substring(2 * i, 2 * i + 2),
                        16).byteValue();
            return result;
        }
    
        private static String toHex(byte[] buf) {
            if (buf == null)
                return "";
            StringBuffer result = new StringBuffer(2 * buf.length);
            for (int i = 0; i < buf.length; i++) {
                appendHex(result, buf[i]);
            }
            return result.toString();
        }
    
        private final static String HEX = "0123456789ABCDEF";
    
        private static void appendHex(StringBuffer sb, byte b) {
            sb.append(HEX.charAt((b >> 4) & 0x0f)).append(HEX.charAt(b & 0x0f));
        }
    
    }
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  • 原文地址:https://www.cnblogs.com/feijian/p/4479446.html
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