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It looks like you're trying to get a 20-character random password generated using the characters from 'a' through 'z'. Here's a solution that uses Bytes::Random::Secure:

perl -MBytes::Random::Secure=random_string_from -E 'say random_string_ +from( join("", "a" .. "z" ), 20 );'

Bytes::Random::Secure uses Math::Random::ISAAC as the Random Number Generator, and relies on Crypt::Random::Source to generate a strong seed for the ISAAC generator. The random_string_from function takes care to be free from modulo bias regardless of source string length.

The current release of Bytes::Random::Secure on CPAN has a sort of hefty dependency chain due to its use of Crypt::Random::Source. The next release (due out in a few days) will replace Crypt::Random::Source with Dana Jacobsen's new Crypt::Random::Seed, which is designed to some degree with Bytes::Random::Secure in mind. It has core-only dependencies, provides better fall-backs and portability than Crypt::Random::Source. The next version of Bytes::Random::Secure (watch for v0.20) will also provide an OO interface alongside the functions interface for times when the user requires more control over how ISAAC is seeded.


In reply to Re: Password (pseudo)casual by davido
in thread Password (pseudo)casual by cisco88

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