AES解密异常Given final block not properly padded-在线助手博客

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AES 128/192/256位CBC/CFB/ECB/OFB/PCBC 在线加密解密

解密内容:1243CFEBD819AA6B1C717DE870459F7B
秘钥:http://www.it399.com
没有使用填充向量iv
AES解密异常Given final block not properly padded

javax.crypto.BadPaddingException: Given final block not properly padded
    at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:966)
    at com.sun.crypto.provider.CipherCore.doFinal(CipherCore.java:824)
    at com.sun.crypto.provider.AESCipher.engineDoFinal(AESCipher.java:436)
    at javax.crypto.Cipher.doFinal(Cipher.java:2165)

原因: 解密的时候直接对输入的16进制值 1243CFEBD819AA6B1C717DE870459F7B 取getBytes了,这样获取到的字节数组长度是16,不能直接这样操作

inputValue.getBytes(AESUtil.CHARSET)

需要将16进制转字节数组,这样获取到的内容是32位,而且和之前直接获取到的字节数组不一样。

TypeConvert.hexStringToBytes(inputValue)

16进制转字节数组方法

/**
     * Convert hex string to byte[]
     *
     * @param hexString the hex string
     * @return byte[]
     */
    public static byte[] hexStringToBytes(String hexString) {
        if (hexString == null || hexString.equals("")) {
            return null;
        }
        hexString = hexString.toUpperCase();
        int length = hexString.length() / 2;
        char[] hexChars = hexString.toCharArray();
        byte[] d = new byte[length];
        for (int i = 0; i < length; i++) {
            int pos = i * 2;
            d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
        }
        return d;
    }

这样解密之后的字符串是 在线助手 正常!!

还有一种情况是输入的字符串不正常不能解密!

相关文章

AES 128/192/256位CBC/CFB/ECB/OFB/PCBC加密解密

http://www.it399.com/blog/web/201805211243

AES 128/192/256位CBC/CFB/ECB/OFB/PCBC在线加密解密|在线工具|在线助手|在线生成|在线制作

http://www.it399.com/aes

AES解密异常Given final block not properly padded

http://www.it399.com/blog/web/201805211406

本文同步发布在 在线助手博客|在线助手|在线工具|在线生成|在线制作转载请注明来自 在线助手博客 频道【AES解密异常Given final block not properly padded】,原文链接:**http://www.it399.com/blog/web/201805211406**

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