关于javax.crypto.BadPaddingException异常
关于Linux操作系统下AES解密失败的异常如下:
javax.crypto.BadPaddingException: Given final block not properly padded. Such issues can arise if a bad key is used during decryption.
由于windows上每次生成的key都相同,但是在solaris或部分linux系统上则不同,所以造成解密失败
解决方法如下:
经过检查之后,定位原来在生成KEY的方法上,如下:
view plain
public static SecretKey getKey (String strKey) {
try {
KeyGenerator _generator = KeyGenerator.getInstance( "AES" );
_generator.init(128 , new SecureRandom(strKey.getBytes()));
return _generator.generateKey();
} catch (Exception e) {
throw new RuntimeException( " 初始化密钥出现异常 " );
}
}
修改到如下方式,问题解决:
view plain
public static SecretKey getKey(String strKey) {
try {
KeyGenerator _generator = KeyGenerator.getInstance( "AES" );
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG" );
secureRandom.setSeed(strKey.getBytes());
_generator.init(128 ,secureRandom);
return _generator.generateKey();
} catch (Exception e) {
throw new RuntimeException( " 初始化密钥出现异常 " );
}
}
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