Package org.bouncycastle.crypto.engines
Class CAST6Engine
- java.lang.Object
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- org.bouncycastle.crypto.engines.CAST5Engine
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- org.bouncycastle.crypto.engines.CAST6Engine
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- All Implemented Interfaces:
BlockCipher
public final class CAST6Engine extends CAST5Engine
A class that provides CAST6 key encryption operations, such as encoding data and generating keys. All the algorithms herein are from the Internet RFC RFC2612 - CAST6 (128bit block, 128-256bit key) and implement a simplified cryptography interface.
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Field Summary
Fields Modifier and Type Field Description protected int[]
_Km
protected int[]
_Kr
protected int[]
_Tm
protected int[]
_Tr
protected static int
BLOCK_SIZE
protected static int
ROUNDS
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Fields inherited from class org.bouncycastle.crypto.engines.CAST5Engine
MAX_ROUNDS, RED_ROUNDS
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Constructor Summary
Constructors Constructor Description CAST6Engine()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected void
CAST_Decipher(int A, int B, int C, int D, int[] result)
Does the 12 quad rounds rounds to decrypt the block.protected void
CAST_Encipher(int A, int B, int C, int D, int[] result)
Does the 12 quad rounds rounds to encrypt the block.protected int
decryptBlock(byte[] src, int srcIndex, byte[] dst, int dstIndex)
Decrypt the given input starting at the given offset and place the result in the provided buffer starting at the given offset.protected int
encryptBlock(byte[] src, int srcIndex, byte[] dst, int dstIndex)
Encrypt the given input starting at the given offset and place the result in the provided buffer starting at the given offset.java.lang.String
getAlgorithmName()
Return the name of the algorithm the cipher implements.int
getBlockSize()
Return the block size for this cipher (in bytes).void
reset()
Reset the cipher.protected void
setKey(byte[] key)
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Methods inherited from class org.bouncycastle.crypto.engines.CAST5Engine
Bits32ToBytes, Bits32ToInts, BytesTo32bits, CAST_Decipher, CAST_Encipher, F1, F2, F3, init, IntsTo32bits, processBlock
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Field Detail
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ROUNDS
protected static final int ROUNDS
- See Also:
- Constant Field Values
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BLOCK_SIZE
protected static final int BLOCK_SIZE
- See Also:
- Constant Field Values
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_Kr
protected int[] _Kr
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_Km
protected int[] _Km
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_Tr
protected int[] _Tr
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_Tm
protected int[] _Tm
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Method Detail
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getAlgorithmName
public java.lang.String getAlgorithmName()
Description copied from interface:BlockCipher
Return the name of the algorithm the cipher implements.- Specified by:
getAlgorithmName
in interfaceBlockCipher
- Overrides:
getAlgorithmName
in classCAST5Engine
- Returns:
- the name of the algorithm the cipher implements.
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reset
public void reset()
Description copied from interface:BlockCipher
Reset the cipher. After resetting the cipher is in the same state as it was after the last init (if there was one).- Specified by:
reset
in interfaceBlockCipher
- Overrides:
reset
in classCAST5Engine
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getBlockSize
public int getBlockSize()
Description copied from interface:BlockCipher
Return the block size for this cipher (in bytes).- Specified by:
getBlockSize
in interfaceBlockCipher
- Overrides:
getBlockSize
in classCAST5Engine
- Returns:
- the block size for this cipher in bytes.
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setKey
protected void setKey(byte[] key)
- Overrides:
setKey
in classCAST5Engine
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encryptBlock
protected int encryptBlock(byte[] src, int srcIndex, byte[] dst, int dstIndex)
Encrypt the given input starting at the given offset and place the result in the provided buffer starting at the given offset.- Overrides:
encryptBlock
in classCAST5Engine
- Parameters:
src
- The plaintext buffersrcIndex
- An offset into srcdst
- The ciphertext bufferdstIndex
- An offset into dst
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decryptBlock
protected int decryptBlock(byte[] src, int srcIndex, byte[] dst, int dstIndex)
Decrypt the given input starting at the given offset and place the result in the provided buffer starting at the given offset.- Overrides:
decryptBlock
in classCAST5Engine
- Parameters:
src
- The plaintext buffersrcIndex
- An offset into srcdst
- The ciphertext bufferdstIndex
- An offset into dst
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CAST_Encipher
protected final void CAST_Encipher(int A, int B, int C, int D, int[] result)
Does the 12 quad rounds rounds to encrypt the block.- Parameters:
A
- the 00-31 bits of the plaintext blockB
- the 32-63 bits of the plaintext blockC
- the 64-95 bits of the plaintext blockD
- the 96-127 bits of the plaintext blockresult
- the resulting ciphertext
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CAST_Decipher
protected final void CAST_Decipher(int A, int B, int C, int D, int[] result)
Does the 12 quad rounds rounds to decrypt the block.- Parameters:
A
- the 00-31 bits of the ciphertext blockB
- the 32-63 bits of the ciphertext blockC
- the 64-95 bits of the ciphertext blockD
- the 96-127 bits of the ciphertext blockresult
- the resulting plaintext
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