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Bouncy Castle Cryptography 1.11 API Specification: Class JCEBlockCipher
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Bouncy Castle Cryptography 1.11
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org.bouncycastle.jce.provider
Class JCEBlockCipher

java.lang.Object
  |
  +--javax.crypto.CipherSpi
        |
        +--org.bouncycastle.jce.provider.WrapCipherSpi
              |
              +--org.bouncycastle.jce.provider.JCEBlockCipher
All Implemented Interfaces:
PBE
Direct Known Subclasses:
JCEBlockCipher.AES, JCEBlockCipher.Blowfish, JCEBlockCipher.CAST5, JCEBlockCipher.CAST6, JCEBlockCipher.DES, JCEBlockCipher.DESede, JCEBlockCipher.IDEA, JCEBlockCipher.PBEWithMD5AndDES, JCEBlockCipher.PBEWithMD5AndRC2, JCEBlockCipher.PBEWithSHA1AndDES, JCEBlockCipher.PBEWithSHA1AndRC2, JCEBlockCipher.PBEWithSHAAnd128BitRC2, JCEBlockCipher.PBEWithSHAAnd40BitRC2, JCEBlockCipher.PBEWithSHAAndDES2Key, JCEBlockCipher.PBEWithSHAAndDES3Key, JCEBlockCipher.PBEWithSHAAndIDEA, JCEBlockCipher.PBEWithSHAAndTwofish, JCEBlockCipher.RC2, JCEBlockCipher.RC5, JCEBlockCipher.RC564, JCEBlockCipher.RC6, JCEBlockCipher.Rijndael, JCEBlockCipher.Serpent, JCEBlockCipher.Skipjack, JCEBlockCipher.Twofish
public class JCEBlockCipher
extends WrapCipherSpi
implements PBE

Inner Class Summary
static class JCEBlockCipher.AES
          AES
static class JCEBlockCipher.Blowfish
          Blowfish
static class JCEBlockCipher.CAST5
          CAST5
static class JCEBlockCipher.CAST6
          CAST6
static class JCEBlockCipher.DES
          DES
static class JCEBlockCipher.DESede
          DESede
static class JCEBlockCipher.IDEA
          IDEA
static class JCEBlockCipher.PBEWithMD5AndDES
          PBEWithMD5AndDES
static class JCEBlockCipher.PBEWithMD5AndRC2
          PBEWithMD5AndRC2
static class JCEBlockCipher.PBEWithSHA1AndDES
          PBEWithSHA1AndDES
static class JCEBlockCipher.PBEWithSHA1AndRC2
          PBEWithSHA1AndRC2
static class JCEBlockCipher.PBEWithSHAAnd128BitRC2
          PBEWithSHAAnd128BitRC2-CBC
static class JCEBlockCipher.PBEWithSHAAnd40BitRC2
          PBEWithSHAAnd40BitRC2-CBC
static class JCEBlockCipher.PBEWithSHAAndDES2Key
          PBEWithSHAAnd2-KeyTripleDES-CBC
static class JCEBlockCipher.PBEWithSHAAndDES3Key
          PBEWithSHAAnd3-KeyTripleDES-CBC
static class JCEBlockCipher.PBEWithSHAAndIDEA
          PBEWithSHAAndIDEA-CBC
static class JCEBlockCipher.PBEWithSHAAndTwofish
          PBEWithSHAAndTwofish-CBC
static class JCEBlockCipher.RC2
          RC2
static class JCEBlockCipher.RC5
          RC5
static class JCEBlockCipher.RC564
          RC564
static class JCEBlockCipher.RC6
          RC6
static class JCEBlockCipher.Rijndael
          Rijndael
static class JCEBlockCipher.Serpent
          Serpent
static class JCEBlockCipher.Skipjack
          SKIPJACK
static class JCEBlockCipher.Twofish
          Twofish
 
Inner classes inherited from class org.bouncycastle.jce.provider.WrapCipherSpi
WrapCipherSpi.AESWrap
 
Inner classes inherited from class org.bouncycastle.jce.provider.PBE
PBE.Util
 
Fields inherited from class org.bouncycastle.jce.provider.WrapCipherSpi
engineParams, pbeHash, pbeIvSize, pbeKeySize, pbeType
 
Fields inherited from interface org.bouncycastle.jce.provider.PBE
MD5, PKCS12, PKCS5S1, PKCS5S2, RIPEMD160, SHA1, TIGER
 
Constructor Summary
protected JCEBlockCipher(BlockCipher engine)
           
protected JCEBlockCipher(BlockCipher engine, int pbeType, int pbeHash, int pbeKeySize, int pbeIvSize)
           
 
Method Summary
protected  byte[] engineDoFinal(byte[] input, int inputOffset, int inputLen)
          Encrypts or decrypts data in a single-part operation, or finishes a multiple-part operation.
protected  int engineDoFinal(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset)
          Encrypts or decrypts data in a single-part operation, or finishes a multiple-part operation.
protected  int engineGetBlockSize()
          Returns the block size (in bytes).
protected  byte[] engineGetIV()
          Returns the initialization vector (IV) in a new buffer.
protected  int engineGetKeySize(java.security.Key key)
          Returns the key size of the given key object.
protected  int engineGetOutputSize(int inputLen)
          Returns the length in bytes that an output buffer would need to be in order to hold the result of the next update or doFinal operation, given the input length inputLen (in bytes).
protected  java.security.AlgorithmParameters engineGetParameters()
          Returns the parameters used with this cipher.
protected  void engineInit(int opmode, java.security.Key key, java.security.spec.AlgorithmParameterSpec params, java.security.SecureRandom random)
          Initializes this cipher with a key, a set of algorithm parameters, and a source of randomness.
protected  void engineInit(int opmode, java.security.Key key, java.security.AlgorithmParameters params, java.security.SecureRandom random)
          Initializes this cipher with a key, a set of algorithm parameters, and a source of randomness.
protected  void engineInit(int opmode, java.security.Key key, java.security.SecureRandom random)
          Initializes this cipher with a key and a source of randomness.
protected  void engineSetMode(java.lang.String mode)
          Sets the mode of this cipher.
protected  void engineSetPadding(java.lang.String padding)
          Sets the padding mechanism of this cipher.
protected  byte[] engineUpdate(byte[] input, int inputOffset, int inputLen)
          Continues a multiple-part encryption or decryption operation (depending on how this cipher was initialized), processing another data part.
protected  int engineUpdate(byte[] input, int inputOffset, int inputLen, byte[] output, int outputOffset)
          Continues a multiple-part encryption or decryption operation (depending on how this cipher was initialized), processing another data part.
 
Methods inherited from class org.bouncycastle.jce.provider.WrapCipherSpi
engineUnwrap, engineWrap
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

JCEBlockCipher

protected JCEBlockCipher(BlockCipher engine)

JCEBlockCipher

protected JCEBlockCipher(BlockCipher engine,
                         int pbeType,
                         int pbeHash,
                         int pbeKeySize,
                         int pbeIvSize)
Method Detail

engineGetBlockSize

protected int engineGetBlockSize()
Description copied from class: CipherSpi
Returns the block size (in bytes).
Overrides:
engineGetBlockSize in class WrapCipherSpi
Following copied from class: javax.crypto.CipherSpi
Returns:
the block size (in bytes), or 0 if the underlying algorithm is not a block cipher

engineGetIV

protected byte[] engineGetIV()
Description copied from class: CipherSpi
Returns the initialization vector (IV) in a new buffer.

This is useful in the context of password-based encryption or decryption, where the IV is derived from a user-provided passphrase.

Overrides:
engineGetIV in class WrapCipherSpi
Following copied from class: javax.crypto.CipherSpi
Returns:
the initialization vector in a new buffer, or null if the underlying algorithm does not use an IV, or if the IV has not yet been set.

engineGetKeySize

protected int engineGetKeySize(java.security.Key key)
Description copied from class: CipherSpi
Returns the key size of the given key object.

This concrete method has been added to this previously-defined abstract class. It throws an UnsupportedOperationException if it is not overridden by the provider.

Overrides:
engineGetKeySize in class WrapCipherSpi
Following copied from class: javax.crypto.CipherSpi
Parameters:
key - the key object.
Returns:
the key size of the given key object.
Throws:
java.security.InvalidKeyException - if key is invalid.

engineGetOutputSize

protected int engineGetOutputSize(int inputLen)
Description copied from class: CipherSpi
Returns the length in bytes that an output buffer would need to be in order to hold the result of the next update or doFinal operation, given the input length inputLen (in bytes).

This call takes into account any unprocessed (buffered) data from a previous update call, and padding.

The actual output length of the next update or doFinal call may be smaller than the length returned by this method.

Overrides:
engineGetOutputSize in class WrapCipherSpi
Following copied from class: javax.crypto.CipherSpi
Parameters:
inputLen - the input length (in bytes)
Returns:
the required output buffer size (in bytes)

engineGetParameters

protected java.security.AlgorithmParameters engineGetParameters()
Description copied from class: CipherSpi
Returns the parameters used with this cipher.

The returned parameters may be the same that were used to initialize this cipher, or may contain a combination of default and random parameter values used by the underlying cipher implementation if this cipher requires algorithm parameters but was not initialized with any.

Overrides:
engineGetParameters in class WrapCipherSpi
Following copied from class: javax.crypto.CipherSpi
Returns:
the parameters used with this cipher, or null if this cipher does not use any parameters.

engineSetMode

protected void engineSetMode(java.lang.String mode)
Description copied from class: CipherSpi
Sets the mode of this cipher.
Overrides:
engineSetMode in class WrapCipherSpi
Following copied from class: javax.crypto.CipherSpi
Parameters:
mode - the cipher mode
Throws:
java.security.NoSuchAlgorithmException - if the requested cipher mode does not exist

engineSetPadding

protected void engineSetPadding(java.lang.String padding)
                         throws NoSuchPaddingException
Description copied from class: CipherSpi
Sets the padding mechanism of this cipher.
Overrides:
engineSetPadding in class WrapCipherSpi
Following copied from class: javax.crypto.CipherSpi
Parameters:
padding - the padding mechanism
Throws:
NoSuchPaddingException - if the requested padding mechanism does not exist

engineInit

protected void engineInit(int opmode,
                          java.security.Key key,
                          java.security.spec.AlgorithmParameterSpec params,
                          java.security.SecureRandom random)
                   throws java.security.InvalidKeyException,
                          java.security.InvalidAlgorithmParameterException
Description copied from class: CipherSpi
Initializes this cipher with a key, a set of algorithm parameters, and a source of randomness.

The cipher is initialized for one of the following four operations: encryption, decryption, key wrapping or key unwrapping, depending on the value of opmode.

If this cipher requires any algorithm parameters and params is null, the underlying cipher implementation is supposed to generate the required parameters itself (using provider-specific default or random values) if it is being initialized for encryption or key wrapping, and raise an InvalidAlgorithmParameterException if it is being initialized for decryption or key unwrapping. The generated parameters can be retrieved using engineGetParameters or engineGetIV (if the parameter is an IV).

If this cipher (including its underlying feedback or padding scheme) requires any random bytes (e.g., for parameter generation), it will get them from random.

Note that when a Cipher object is initialized, it loses all previously-acquired state. In other words, initializing a Cipher is equivalent to creating a new instance of that Cipher and initializing it.

Overrides:
engineInit in class WrapCipherSpi
Following copied from class: javax.crypto.CipherSpi
Parameters:
opmode - the operation mode of this cipher (this is one of the following: ENCRYPT_MODE, DECRYPT_MODE, WRAP_MODE or UNWRAP_MODE)
key - the encryption key
params - the algorithm parameters
random - the source of randomness
Throws:
java.security.InvalidKeyException - if the given key is inappropriate for initializing this cipher
java.security.InvalidAlgorithmParameterException - if the given algorithm parameters are inappropriate for this cipher, or if this cipher is being initialized for decryption and requires algorithm parameters and params is null.

engineInit

protected void engineInit(int opmode,
                          java.security.Key key,
                          java.security.AlgorithmParameters params,
                          java.security.SecureRandom random)
                   throws java.security.InvalidKeyException,
                          java.security.InvalidAlgorithmParameterException
Description copied from class: CipherSpi
Initializes this cipher with a key, a set of algorithm parameters, and a source of randomness.

The cipher is initialized for one of the following four operations: encryption, decryption, key wrapping or key unwrapping, depending on the value of opmode.

If this cipher requires any algorithm parameters and params is null, the underlying cipher implementation is supposed to generate the required parameters itself (using provider-specific default or random values) if it is being initialized for encryption or key wrapping, and raise an InvalidAlgorithmParameterException if it is being initialized for decryption or key unwrapping. The generated parameters can be retrieved using engineGetParameters or engineGetIV (if the parameter is an IV).

If this cipher (including its underlying feedback or padding scheme) requires any random bytes (e.g., for parameter generation), it will get them from random.

Note that when a Cipher object is initialized, it loses all previously-acquired state. In other words, initializing a Cipher is equivalent to creating a new instance of that Cipher and initializing it.

Overrides:
engineInit in class WrapCipherSpi
Following copied from class: javax.crypto.CipherSpi
Parameters:
opmode - the operation mode of this cipher (this is one of the following: ENCRYPT_MODE, DECRYPT_MODE, WRAP_MODE or UNWRAP_MODE)
key - the encryption key
params - the algorithm parameters
random - the source of randomness
Throws:
java.security.InvalidKeyException - if the given key is inappropriate for initializing this cipher
java.security.InvalidAlgorithmParameterException - if the given algorithm parameters are inappropriate for this cipher, or if this cipher is being initialized for decryption and requires algorithm parameters and params is null.

engineInit

protected void engineInit(int opmode,
                          java.security.Key key,
                          java.security.SecureRandom random)
                   throws java.security.InvalidKeyException
Description copied from class: CipherSpi
Initializes this cipher with a key and a source of randomness.

The cipher is initialized for one of the following four operations: encryption, decryption, key wrapping or key unwrapping, depending on the value of opmode.

If this cipher requires any algorithm parameters that cannot be derived from the given key, the underlying cipher implementation is supposed to generate the required parameters itself (using provider-specific default or random values) if it is being initialized for encryption or key wrapping, and raise an InvalidKeyException if it is being initialized for decryption or key unwrapping. The generated parameters can be retrieved using engineGetParameters or engineGetIV (if the parameter is an IV).

If this cipher (including its underlying feedback or padding scheme) requires any random bytes (e.g., for parameter generation), it will get them from random.

Note that when a Cipher object is initialized, it loses all previously-acquired state. In other words, initializing a Cipher is equivalent to creating a new instance of that Cipher and initializing it.

Overrides:
engineInit in class WrapCipherSpi
Following copied from class: javax.crypto.CipherSpi
Parameters:
opmode - the operation mode of this cipher (this is one of the following: ENCRYPT_MODE, DECRYPT_MODE, WRAP_MODE or UNWRAP_MODE)
key - the encryption key
random - the source of randomness
Throws:
java.security.InvalidKeyException - if the given key is inappropriate for initializing this cipher, or if this cipher is being initialized for decryption and requires algorithm parameters that cannot be determined from the given key.

engineUpdate

protected byte[] engineUpdate(byte[] input,
                              int inputOffset,
                              int inputLen)
Description copied from class: CipherSpi
Continues a multiple-part encryption or decryption operation (depending on how this cipher was initialized), processing another data part.

The first inputLen bytes in the input buffer, starting at inputOffset inclusive, are processed, and the result is stored in a new buffer.

Overrides:
engineUpdate in class WrapCipherSpi
Following copied from class: javax.crypto.CipherSpi
Parameters:
input - the input buffer
inputOffset - the offset in input where the input starts
inputLen - the input length
Returns:
the new buffer with the result, or null if the underlying cipher is a block cipher and the input data is too short to result in a new block.

engineUpdate

protected int engineUpdate(byte[] input,
                           int inputOffset,
                           int inputLen,
                           byte[] output,
                           int outputOffset)
Description copied from class: CipherSpi
Continues a multiple-part encryption or decryption operation (depending on how this cipher was initialized), processing another data part.

The first inputLen bytes in the input buffer, starting at inputOffset inclusive, are processed, and the result is stored in the output buffer, starting at outputOffset inclusive.

If the output buffer is too small to hold the result, a ShortBufferException is thrown.

Overrides:
engineUpdate in class WrapCipherSpi
Following copied from class: javax.crypto.CipherSpi
Parameters:
input - the input buffer
inputOffset - the offset in input where the input starts
inputLen - the input length
output - the buffer for the result
outputOffset - the offset in output where the result is stored
Returns:
the number of bytes stored in output
Throws:
ShortBufferException - if the given output buffer is too small to hold the result

engineDoFinal

protected byte[] engineDoFinal(byte[] input,
                               int inputOffset,
                               int inputLen)
                        throws IllegalBlockSizeException,
                               BadPaddingException
Description copied from class: CipherSpi
Encrypts or decrypts data in a single-part operation, or finishes a multiple-part operation. The data is encrypted or decrypted, depending on how this cipher was initialized.

The first inputLen bytes in the input buffer, starting at inputOffset inclusive, and any input bytes that may have been buffered during a previous update operation, are processed, with padding (if requested) being applied. The result is stored in a new buffer.

A call to this method resets this cipher object to the state it was in when previously initialized via a call to engineInit. That is, the object is reset and available to encrypt or decrypt (depending on the operation mode that was specified in the call to engineInit) more data.

Overrides:
engineDoFinal in class WrapCipherSpi
Following copied from class: javax.crypto.CipherSpi
Parameters:
input - the input buffer
inputOffset - the offset in input where the input starts
inputLen - the input length
Returns:
the new buffer with the result
Throws:
IllegalBlockSizeException - if this cipher is a block cipher, no padding has been requested (only in encryption mode), and the total input length of the data processed by this cipher is not a multiple of block size
BadPaddingException - if this cipher is in decryption mode, and (un)padding has been requested, but the decrypted data is not bounded by the appropriate padding bytes

engineDoFinal

protected int engineDoFinal(byte[] input,
                            int inputOffset,
                            int inputLen,
                            byte[] output,
                            int outputOffset)
                     throws IllegalBlockSizeException,
                            BadPaddingException
Description copied from class: CipherSpi
Encrypts or decrypts data in a single-part operation, or finishes a multiple-part operation. The data is encrypted or decrypted, depending on how this cipher was initialized.

The first inputLen bytes in the input buffer, starting at inputOffset inclusive, and any input bytes that may have been buffered during a previous update operation, are processed, with padding (if requested) being applied. The result is stored in the output buffer, starting at outputOffset inclusive.

If the output buffer is too small to hold the result, a ShortBufferException is thrown.

A call to this method resets this cipher object to the state it was in when previously initialized via a call to engineInit. That is, the object is reset and available to encrypt or decrypt (depending on the operation mode that was specified in the call to engineInit) more data.

Overrides:
engineDoFinal in class WrapCipherSpi
Following copied from class: javax.crypto.CipherSpi
Parameters:
input - the input buffer
inputOffset - the offset in input where the input starts
inputLen - the input length
output - the buffer for the result
outputOffset - the offset in output where the result is stored
Returns:
the number of bytes stored in output
Throws:
IllegalBlockSizeException - if this cipher is a block cipher, no padding has been requested (only in encryption mode), and the total input length of the data processed by this cipher is not a multiple of block size
ShortBufferException - if the given output buffer is too small to hold the result
BadPaddingException - if this cipher is in decryption mode, and (un)padding has been requested, but the decrypted data is not bounded by the appropriate padding bytes
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Bouncy Castle Cryptography 1.11
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