public class AesCipherService extends DefaultBlockCipherService
CipherService
using the AES
cipher algorithm for all encryption, decryption, and key operations.
The AES algorithm can support key sizes of 128
, 192
and 256
bits*. This implementation
defaults to 128 bits.
Note that this class retains the parent class's default CBC
mode of operation
instead of the typical JDK default of ECB
. ECB
should not be used in
security-sensitive environments because ECB
does not allow for initialization vectors, which are
considered necessary for strong encryption. See the parent class
's JavaDoc and the
JcaCipherService
JavaDoc for more on why the JDK default should not be used and is not
used in this implementation.
* Generating and using AES key sizes greater than 128 require installation of the
Java Cryptography Extension (JCE) Unlimited Strength
Jurisdiction Policy files.Constructor and Description |
---|
AesCipherService()
Creates a new
CipherService instance using the AES cipher algorithm with the following
important cipher default attributes:
Attribute
Value
keySize
128 bits
blockSize
128 bits (required for AES
mode
CBC *
paddingScheme
PKCS5
initializationVectorSize
128 bits
generateInitializationVectors
true **
* The CBC operation mode is used instead of the JDK default ECB to
ensure strong encryption. |
generateInitializationVector, getBlockSize, getModeName, getPaddingSchemeName, getStreamingBlockSize, getStreamingModeName, getStreamingPaddingSchemeName, getTransformationString, isGenerateInitializationVectors, setBlockSize, setMode, setModeName, setPaddingScheme, setPaddingSchemeName, setStreamingBlockSize, setStreamingMode, setStreamingModeName, setStreamingPaddingScheme, setStreamingPaddingSchemeName
generateNewKey, generateNewKey
decrypt, decrypt, encrypt, encrypt, ensureSecureRandom, getAlgorithmName, getDefaultSecureRandom, getInitializationVectorSize, getKeySize, getSecureRandom, getStreamingBufferSize, isGenerateInitializationVectors, setGenerateInitializationVectors, setInitializationVectorSize, setKeySize, setSecureRandom, setStreamingBufferSize
public AesCipherService()
CipherService
instance using the AES
cipher algorithm with the following
important cipher default attributes:
Attribute | Value |
---|---|
keySize |
128 bits |
blockSize |
128 bits (required for AES |
mode |
CBC * |
paddingScheme |
PKCS5 |
initializationVectorSize |
128 bits |
generateInitializationVectors |
true ** |
CBC
operation mode is used instead of the JDK default ECB
to
ensure strong encryption. ECB
should not be used in security-sensitive environments - see the
DefaultBlockCipherService
class JavaDoc's "Operation Mode" section
for more.
**In conjunction with the default CBC
operation mode, initialization vectors are generated by
default to ensure strong encryption. See the JcaCipherService
class JavaDoc for more.Copyright © 2004-2016 The Apache Software Foundation. All Rights Reserved.