android 开发解密时出现pad block corrupted 错误

情景：在虚拟机上运行正常的，但是到我的真机上就解密失败，出现pad block corrupted ，据说是版本原因：我机器是小米3 最新版的android 4.2

出现问题的代码：

private static byte[] getRawKey(byte[] seed) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
//SecureRandom sr = SecureRandom.getInstance("SHA1PRNG"); //之前代码
SecureRandom sr = SecureRandom.getInstance("SHA1PRNG","Crypto"); //修改之后的代码
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;
}

下面附上改加密解密类的全部代码：

package com.example.qurenwu.qurenwu_2.util;import java.security.SecureRandom;import javax.crypto.Cipher;import javax.crypto.KeyGenerator;import javax.crypto.SecretKey;import javax.crypto.spec.SecretKeySpec;/** * AES加密器 * @author Eric_Ni * */public class AESEncryptor {    /**     * AES加密     */    public static String encrypt(String seed, String cleartext) throws Exception {        byte[] rawKey = getRawKey(seed.getBytes());        byte[] result = encrypt(rawKey, cleartext.getBytes());        return toHex(result);    }    /**     * AES解密     */    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");        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;    }    /**     * 加密     * @param raw     * @param clear     * @return     * @throws Exception     */    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);        byte[] encrypted = cipher.doFinal(clear);        return encrypted;    }    /**     * 解密     * @param raw     * @param encrypted     * @return     * @throws Exception     */    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);        byte[] decrypted = cipher.doFinal(encrypted);        return decrypted;    }    public static String toHex(String txt) {        return toHex(txt.getBytes());    }    public static String fromHex(String hex) {        return new String(toByte(hex));    }    public 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;    }    public 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));    }}

调用方法：

password = AESEncryptor.decrypt(AES_SEED, password);  // AES_SEED是种子码，我也不清楚具体什么作用，反正可以随自己定义

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