org.bouncycastle.crypto.macs
public class CFBBlockCipherMac extends Object implements Mac
Constructor Summary | |
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CFBBlockCipherMac(BlockCipher cipher)
create a standard MAC based on a CFB block cipher. | |
CFBBlockCipherMac(BlockCipher cipher, BlockCipherPadding padding)
create a standard MAC based on a CFB block cipher. | |
CFBBlockCipherMac(BlockCipher cipher, int cfbBitSize, int macSizeInBits)
create a standard MAC based on a block cipher with the size of the
MAC been given in bits. | |
CFBBlockCipherMac(BlockCipher cipher, int cfbBitSize, int macSizeInBits, BlockCipherPadding padding)
create a standard MAC based on a block cipher with the size of the
MAC been given in bits. |
Method Summary | |
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int | doFinal(byte[] out, int outOff) |
String | getAlgorithmName() |
int | getMacSize() |
void | init(CipherParameters params) |
void | reset()
Reset the mac generator. |
void | update(byte in) |
void | update(byte[] in, int inOff, int len) |
Parameters: cipher the cipher to be used as the basis of the MAC generation.
Parameters: cipher the cipher to be used as the basis of the MAC generation. padding the padding to be used.
Note: the size of the MAC must be at least 24 bits (FIPS Publication 81), or 16 bits if being used as a data authenticator (FIPS Publication 113), and in general should be less than the size of the block cipher as it reduces the chance of an exhaustive attack (see Handbook of Applied Cryptography).
Parameters: cipher the cipher to be used as the basis of the MAC generation. cfbBitSize the size of an output block produced by the CFB mode. macSizeInBits the size of the MAC in bits, must be a multiple of 8.
Note: the size of the MAC must be at least 24 bits (FIPS Publication 81), or 16 bits if being used as a data authenticator (FIPS Publication 113), and in general should be less than the size of the block cipher as it reduces the chance of an exhaustive attack (see Handbook of Applied Cryptography).
Parameters: cipher the cipher to be used as the basis of the MAC generation. cfbBitSize the size of an output block produced by the CFB mode. macSizeInBits the size of the MAC in bits, must be a multiple of 8. padding a padding to be used.