License:
BSD style: see doc/license.txt for details
Version:
Initial release: Feb 2006
author:
Regan Heath, Oskar Linde
This module implements the MD2 Message Digest Algorithm as described
by RFC 1319 The MD2 Message-Digest Algorithm. B. Kaliski. April 1992.
- class
Md2
: tango.io.digest.MerkleDamgard.MerkleDamgard;
- this();
- Construct an Md2
- protected void
reset
();
- Initialize the cipher
Remarks:
Returns the cipher state to it's initial value
- protected void
createDigest
(ubyte[] buf);
- Obtain the digest
Returns:
the digest
Remarks:
Returns a digest of the current cipher state, this may
be the final digest, or a digest of the state between
calls to update()
- uint
digestSize
();
- The MD 2 digest size is 16 bytes
- protected uint
blockSize
();
- block size
Returns:
the block size
Remarks:
Specifies the size (in bytes) of the block of data to pass to
each call to transform(). For MD2 the
blockSize
is 16.
- protected uint
addSize
();
- Length padding size
Returns:
the length padding size
Remarks:
Specifies the size (in bytes) of the padding which uses the
length of the data which has been ciphered, this padding is
carried out by the padLength method. For MD2 the
addSize
is
0
- protected void
padMessage
(ubyte[] data);
- Pads the cipher data
Params:
| ubyte[] data |
a slice of the cipher buffer to fill with padding |
Remarks:
Fills the passed buffer slice with the appropriate padding
for the final call to transform(). This padding will fill
the cipher buffer up to blockSize()-addSize().
- protected void
transform
(ubyte[] input);
- Performs the cipher on a block of data
Params:
| data |
the block of data to cipher |
Remarks:
The actual cipher algorithm is carried out by this method on
the passed block of data. This method is called for every
blockSize() bytes of input data and once more with the
remaining data padded to blockSize().
- protected void
extend
();
- Final processing of cipher.
Remarks:
This method is called after the final transform just prior to
the creation of the final digest. The MD2 algorithm requires
an additional step at this stage. Future ciphers may or may not
require this method.
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