java.lang.Object | |
↳ | org.bouncycastle.crypto.macs.CFBBlockCipherMac |
Public Constructors | |||||||||||
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create a standard MAC based on a CFB block cipher.
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create a standard MAC based on a CFB block cipher.
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create a standard MAC based on a block cipher with the size of the
MAC been given in bits.
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create a standard MAC based on a block cipher with the size of the
MAC been given in bits.
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Public Methods | |||||||||||
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Compute the final stage of the MAC writing the output to the out
parameter.
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Return the name of the algorithm the MAC implements.
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Return the block size for this MAC (in bytes).
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Initialise the MAC.
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Reset the mac generator.
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add a single byte to the mac for processing.
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Inherited Methods | |||||||||||
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From class
java.lang.Object
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From interface
org.bouncycastle.crypto.Mac
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create a standard MAC based on a CFB block cipher. This will produce an authentication code half the length of the block size of the cipher, with the CFB mode set to 8 bits.
cipher | the cipher to be used as the basis of the MAC generation. |
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create a standard MAC based on a CFB block cipher. This will produce an authentication code half the length of the block size of the cipher, with the CFB mode set to 8 bits.
cipher | the cipher to be used as the basis of the MAC generation. |
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padding | the padding to be used. |
create a standard MAC based on a block cipher with the size of the MAC been given in bits. This class uses CFB mode as the basis for the MAC generation.
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).
cipher | the cipher to be used as the basis of the MAC generation. |
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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. |
create a standard MAC based on a block cipher with the size of the MAC been given in bits. This class uses CFB mode as the basis for the MAC generation.
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).
cipher | the cipher to be used as the basis of the MAC generation. |
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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. |
Compute the final stage of the MAC writing the output to the out parameter.
doFinal leaves the MAC in the same state it was after the last init.
out | the array the MAC is to be output to. |
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outOff | the offset into the out buffer the output is to start at. |
Return the name of the algorithm the MAC implements.
Return the block size for this MAC (in bytes).
Initialise the MAC.
params | the key and other data required by the MAC. |
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Reset the mac generator.
add a single byte to the mac for processing.
in | the byte to be processed. |
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