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org.apache.derby.iapi.services.crypto
Interface CipherProvider
- public interface CipherProvider
A CipherProvider is a wrapper for a Cipher class in JCE. This service is only available when run on JDK1.2 or beyond. To use this service, either the SunJCE or an alternative clean room implementation of the JCE must be installed. To use a CipherProvider to encrypt or decrypt, it needs 3 things: 1) A CipherProvider that is initialized to ENCRYPT or DECRYPT 2) A secret Key for the encryption/decryption 3) An Initialization Vector (IvParameterSpec) that is used to create some randomness in the encryption See $WS/docs/funcspec/mulan/configurableEncryption.html See http://java.sun.com/products/JDK/1.1/docs/guide/security/CryptoSpec.html See http://java.sun.com/products/JDK/1.2/docs/guide/security/CryptoSpec.html See http://java.sun.com/products/jdk/1.2/jce/index.html
| Method Summary | |
int |
decrypt(byte[] ciphertext,
int offset,
int length,
byte[] cleartext,
int outputOffset)
Decrypt data - use only with Cipher that has been initialized with CipherFactory.DECRYPT. |
int |
encrypt(byte[] cleartext,
int offset,
int length,
byte[] ciphertext,
int outputOffset)
Encrypt data - use only with Cipher that has been initialized with CipherFactory.ENCRYPT. |
int |
getEncryptionBlockSize()
Returns the encryption block size used during creation of the encrypted database |
| Method Detail |
encrypt
public int encrypt(byte[] cleartext,
int offset,
int length,
byte[] ciphertext,
int outputOffset)
throws org.apache.derby.iapi.error.StandardException
- Encrypt data - use only with Cipher that has been initialized with
CipherFactory.ENCRYPT.
decrypt
public int decrypt(byte[] ciphertext,
int offset,
int length,
byte[] cleartext,
int outputOffset)
throws org.apache.derby.iapi.error.StandardException
- Decrypt data - use only with Cipher that has been initialized with
CipherFactory.DECRYPT.
getEncryptionBlockSize
public int getEncryptionBlockSize()
- Returns the encryption block size used during creation of the encrypted database
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