我正在尝试使用bouncycastle jar进行加密,以下是我的代码。
private static byte[] encrypt(byte[] plain, byte[] key, byte[] iv) throws Exception
{
PaddedBufferedBlockCipher aes = new PaddedBufferedBlockCipher(new CBCBlockCipher(
new AESEngine()));
CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key), iv);
aes.init(true, ivAndKey);
return cipherData(aes, plain);
}
这是我的主代码:
String msg="hello";
String key="123";
SecureRandom secureRandom = new SecureRandom();
byte[] keyB = new byte[16];
secureRandom.nextBytes(keyB);
SecretKey secretKey = new SecretKeySpec(keyB, "AES");
byte[] enc=encrypt(msg.getBytes(),key.getBytes(),keyB);
System.out.println(new String(enc));
但我得到
Exception in thread "main" java.lang.IllegalArgumentException: Key length not 128/192/256 bits.
at org.bouncycastle.crypto.engines.AESEngine.generateWorkingKey(Unknown Source)
at org.bouncycastle.crypto.engines.AESEngine.init(Unknown Source)
at org.bouncycastle.crypto.modes.CBCBlockCipher.init(Unknown Source)
at org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher.init(Unknown Source)
at Aes.encrypt(Aes.java:122)
at Aes.main(Aes.java:47)
你没有把你认为的东西传入 encrypt()
方法,你传递的是编码的字符串内容,而不是你创建的几行键数组。
String key="123";
…
byte[] enc=encrypt(msg.getBytes(),key.getBytes(),keyB);
你要传递的是编码的字符串内容,而不是你创建的几行键数组。