1Crypt::DSA::KeyChain(3)User Contributed Perl DocumentatioCnrypt::DSA::KeyChain(3)
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NAME

6       Crypt::DSA::KeyChain - DSA key generation system
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SYNOPSIS

9           use Crypt::DSA::KeyChain;
10           my $keychain = Crypt::DSA::KeyChain->new;
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12           my $key = $keychain->generate_params(
13                           Size      => 512,
14                           Seed      => $seed,
15                           Verbosity => 1,
16                     );
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18           $keychain->generate_keys($key);
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DESCRIPTION

21       Crypt::DSA::KeyChain is a lower-level interface to key generation than
22       the interface in Crypt::DSA (the keygen method). It allows you to
23       separately generate the p, q, and g key parameters, given an optional
24       starting seed, and a mandatory bit size for p (q and g are 160 bits
25       each).
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27       You can then call generate_keys to generate the public and private
28       portions of the key.
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USAGE

31   $keychain = Crypt::DSA::KeyChain->new
32       Constructs a new Crypt::DSA::KeyChain object. At the moment this isn't
33       particularly useful in itself, other than being the object you need in
34       order to call the other methods.
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36       Returns the new object.
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38   $key = $keychain->generate_params(%arg)
39       Generates a set of DSA parameters: the p, q, and g values of the key.
40       This involves finding primes, and as such it can be a relatively long
41       process.
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43       When invoked in scalar context, returns a new Crypt::DSA::Key object.
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45       In list context, returns the new Crypt::DSA::Key object, along with:
46       the value of the internal counter when a suitable prime p was found;
47       the value of h when g was derived; and the value of the seed (a 20-byte
48       string) when q was found. These values aren't particularly useful in
49       normal circumstances, but they could be useful.
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51       %arg can contain:
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53       ·   Size
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55           The size in bits of the p value to generate. The q and g values are
56           always 160 bits each.
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58           This argument is mandatory.
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60       ·   Seed
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62           A seed with which q generation will begin. If this seed does not
63           lead to a suitable prime, it will be discarded, and a new random
64           seed chosen in its place, until a suitable prime can be found.
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66           This is entirely optional, and if not provided a random seed will
67           be generated automatically.
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69       ·   Verbosity
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71           Should be either 0 or 1. A value of 1 will give you a progress
72           meter during p and q generation--this can be useful, since the
73           process can be relatively long.
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75           The default is 0.
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77   $keychain->generate_keys($key)
78       Generates the public and private portions of the key $key, a
79       Crypt::DSA::Key object.
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82       Please see the Crypt::DSA manpage for author, copyright, and license
83       information.
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87perl v5.28.1                      2011-06-17           Crypt::DSA::KeyChain(3)
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