Digest::MultiHash - XOR based, variable width multiplexing of hashes (a generalized Digest::SV1).
use Digest::MultiHash;
my $d = Digest::Multihash->new(
width => 16, # bytes
hashs => ["SHA-512", "Whirlpool"], # see below for arbitrary arguments
);
$d->add($data);
print $d->hexdigest;
This class inherits from the Digest::base manpage, and provides generalized digest multiplexing.
It will multiplex all calls to add to all of it's sub digest objects.
Likewise, when the final digest is extracted the digests will be extracted and
then XOR'd over eachother according to width.
width will default to the width of the first hash if unspecified.
hashes defaults to SHA-1 for compatibility reasons.
This module is useful for generating keys from passphrases, by supplying the desired width and simply making sure there is enough data from the combined hashes.
See the Digest manpage for the complete API. This module inherits from the Digest::base manpage.
This methods accepts a hash reference or an even sized list of parameters named according to the methods.
Compute the hash by calling digest on all of the subhashes, splitting the
result up into width sized chunk, and then XORing these together.
If the result is not aligned on width the result will not be truncated. The
shorter string will still be XOR'd with the hash, even if this only affects
part of the result.
If there are not at least width bytes of data in the output of the combined
hashes an error is thrown.
Clones the hash.
Get the array of hashes to use. Array values in this will be dereferenced before the call to new in the Digest manpage to allow passing of arbitrary arguments. Blessed objects (of any class) will be used verbatim.
The list of hashes cannot be changed after construction.
Get/set the byte-width to use.
the Digest manpage, the Digest::SV1 manpage, the Digest::SHA1 manpage