Package org.conscrypt

Class OpenSSLCipher.EVP_CIPHER

java.lang.Object

javax.crypto.CipherSpi

org.conscrypt.OpenSSLCipher

org.conscrypt.OpenSSLCipher.EVP_CIPHER

Direct Known Subclasses:

OpenSSLCipher.EVP_CIPHER.AES, OpenSSLCipher.EVP_CIPHER.ARC4, OpenSSLCipher.EVP_CIPHER.DESEDE

Enclosing class:

OpenSSLCipher

public abstract static class OpenSSLCipher.EVP_CIPHER
extends OpenSSLCipher

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	OpenSSLCipher.EVP_CIPHER.AES
static class	OpenSSLCipher.EVP_CIPHER.ARC4
static class	OpenSSLCipher.EVP_CIPHER.DESEDE

Nested classes/interfaces inherited from class org.conscrypt.OpenSSLCipher

OpenSSLCipher.EVP_AEAD, OpenSSLCipher.EVP_CIPHER, OpenSSLCipher.Mode, OpenSSLCipher.Padding

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	calledUpdate	Whether the cipher has processed any data yet.

Fields inherited from class org.conscrypt.OpenSSLCipher

encodedKey, iv, mode

Constructor Summary

Constructors

Constructor	Description
EVP_CIPHER(OpenSSLCipher.Mode mode, OpenSSLCipher.Padding padding)

Method Summary

Modifier and Type	Method	Description
protected int	doFinalInternal(byte[] output, int outputOffset, int maximumLen)	API-specific implementation of the final block.
protected void	engineInitInternal(byte[] encodedKey, AlgorithmParameterSpec params, SecureRandom random)	API-specific implementation of initializing the cipher.
protected abstract String	getCipherName(int keySize, OpenSSLCipher.Mode mode)	Returns the OpenSSL cipher name for the particular keySize and cipher mode.
protected int	getOutputSizeForFinal(int inputLen)	The size of output if doFinal() is called with this inputLen.
protected int	getOutputSizeForUpdate(int inputLen)	The size of output if update() is called with this inputLen.
protected int	updateInternal(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset, int maximumLen)	API-specific implementation of updating the cipher.

Methods inherited from class org.conscrypt.OpenSSLCipher

checkSupportedKeySize, checkSupportedMode, checkSupportedPadding, engineDoFinal, engineDoFinal, engineGetBlockSize, engineGetIV, engineGetOutputSize, engineGetParameters, engineInit, engineInit, engineInit, engineSetMode, engineSetPadding, engineUnwrap, engineUpdate, engineUpdate, engineWrap, getBaseCipherName, getCipherBlockSize, getPadding, isEncrypting, supportsVariableSizeIv, supportsVariableSizeKey

Methods inherited from class javax.crypto.CipherSpi

engineDoFinal, engineGetKeySize, engineUpdate, engineUpdateAAD, engineUpdateAAD

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

calledUpdate

protected boolean calledUpdate

Whether the cipher has processed any data yet. EVP_CIPHER doesn't like calling "doFinal()" in decryption mode without processing any updates.

Constructor Detail

EVP_CIPHER

public EVP_CIPHER(OpenSSLCipher.Mode mode,
                  OpenSSLCipher.Padding padding)

Method Detail

engineInitInternal

protected void engineInitInternal(byte[] encodedKey,
                                  AlgorithmParameterSpec params,
                                  SecureRandom random)
                           throws InvalidKeyException,
                                  InvalidAlgorithmParameterException

Description copied from class: OpenSSLCipher

API-specific implementation of initializing the cipher. The OpenSSLCipher.isEncrypting() function will tell whether it should be initialized for encryption or decryption. The encodedKey will be the bytes of a supported key size.

Specified by:

engineInitInternal in class OpenSSLCipher

Throws:

InvalidKeyException

InvalidAlgorithmParameterException

updateInternal

protected int updateInternal(byte[] input,
                             int inputOffset,
                             int inputLen,
                             byte[] output,
                             int outputOffset,
                             int maximumLen)
                      throws ShortBufferException

Description copied from class: OpenSSLCipher

API-specific implementation of updating the cipher. The maximumLen will be the maximum length of the output as returned by OpenSSLCipher.getOutputSizeForUpdate(int). The return value must be the number of bytes processed and placed into output. On error, an exception must be thrown.

Specified by:

updateInternal in class OpenSSLCipher

Throws:

ShortBufferException

doFinalInternal

protected int doFinalInternal(byte[] output,
                              int outputOffset,
                              int maximumLen)
                       throws IllegalBlockSizeException,
                              BadPaddingException,
                              ShortBufferException

Description copied from class: OpenSSLCipher

API-specific implementation of the final block. The maximumLen will be the maximum length of the possible output as returned by OpenSSLCipher.getOutputSizeForFinal(int). The return value must be the number of bytes processed and placed into output. On error, an exception must be thrown.

Specified by:

doFinalInternal in class OpenSSLCipher

Throws:

IllegalBlockSizeException

BadPaddingException

ShortBufferException

getOutputSizeForFinal

protected int getOutputSizeForFinal(int inputLen)

Description copied from class: OpenSSLCipher

The size of output if doFinal() is called with this inputLen. If padding is enabled and the size of the input puts it right at the block size, it will add another block for the padding.

Specified by:

getOutputSizeForFinal in class OpenSSLCipher

getOutputSizeForUpdate

protected int getOutputSizeForUpdate(int inputLen)

Description copied from class: OpenSSLCipher

The size of output if update() is called with this inputLen. If padding is enabled and the size of the input puts it right at the block size, it will add another block for the padding.

Specified by:

getOutputSizeForUpdate in class OpenSSLCipher

getCipherName

protected abstract String getCipherName(int keySize,
                                        OpenSSLCipher.Mode mode)

Returns the OpenSSL cipher name for the particular keySize and cipher mode.