Random(3pm)
NAME
Crypt::OpenSSL::RSA - RSA encoding and decoding, using the openSSL
libraries
Crypt::OpenSSL::Random - Routines for accessing the OpenSSL
pseudo-random number generator
SYNOPSIS
use Crypt::OpenSSL::Random;
Crypt::OpenSSL::Random::random_seed($good_random_data);
Crypt::OpenSSL::Random::random_egd("/tmp/entropy");
Crypt::OpenSSL::Random::random_status() or
die "Unable to sufficiently seed the random number generator".
my $ten_good_random_bytes = Crypt::OpenSSL::Random::random_bytes(10);
my $ten_ok_random_bytes = Crypt::OpenSSL::Random::random_pseudo_bytes(10);
DESCRIPTION
Crypt::OpenSSL::Random provides the ability to seed and query the
OpenSSL library's pseudo-random number generator
EXPORT
None by default.
Static Methods
- random_bytes
- This function, returns a specified number of cryptographically
strong pseudo-random bytes from the PRNG. If the PRNG has not been seeded with enough randomness to ensure an unpredictable byte
sequence, then a false value is returned. - random_pseudo_bytes
- This function, is similar to c<random_bytes>, but the resulting
sequence of bytes are not necessarily unpredictable. They can be
used for non-cryptographic purposes and for certain purposes in
cryptographic protocols, but usually not for key generation etc. - random_seed
- This function seeds the PRNG with a supplied string of bytes. It
returns true if the PRNG has sufficient seeding. Note: calling
this function with non-random bytes is of limited value at best! - random_egd
- This function seeds the PRNG with data from the specified entropy
gathering daemon. Returns the number of bytes read from the daemon on succes, or -1 if not enough bytes were read, or if the
connection to the daemon failed. - random_status
- This function returns true if the PRNG has sufficient seeding.
BUGS
Because of the internal workings of OpenSSL's random library, the
pseudo-random number generator (PRNG) accessed by
Crypt::OpenSSL::Random will be different than the one accessed by any
other perl module. Hence, to use a module such as
Crypt::OpenSSL::Random, you will need to seed the PRNG used there from
one used here. This class is still advantageous, however, as it
centralizes other methods, such as random_egd, in one place.
AUTHOR
Ian Robertson, iroberts@cpan.com
SEE ALSO
perl(1), rand(3), RAND_add(3), RAND_egd(3), RAND_bytes(3).
POD ERRORS
Hey! The above document had some coding errors, which are explained
below:
- Around line 62:
- '=item' outside of any '=over'
- Around line 93:
- You forgot a '=back' before '=head1'