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On-line encryption and decryption of AES 128Blue192 and256-bit CBC/CFB/ECB/OFB/PCBC

Decrypted content: 1243CFEBD819AA6B1C717DE870459F7B

Secret key: http://www.it399.com

No fill vector iv is used

AES decryption exception 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)

Reason: decryption directly to the input hexadecimal value: 1243CFEBD819AA6B1C717DE870459F7B took getBytes, so the length of the byte array obtained is 16, can not be operated directly.

InputValue.getBytes (AESUtil.CHARSET)

You need to convert the hexadecimal to-byte array so that the content is 32 bits, and it is different from the byte array directly obtained before.

TypeConvert.hexStringToBytes (inputValue)

Hexadecimal rotation byte array method

/ * *

* 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; iTunes +) {

Int pos = I * 2

D [I] = (byte) (charToByte (hexChars [pos]))

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