The hashed text from crypt can be longer than 8 characters unless you are working with ancient implementation 
#!/usr/bin/env perl
use strict;
use warnings;

# a non-random salt == 'salt'

#SHA256
print crypt("secret",'$5$salt');
print "\n";

#SHA512
print crypt("secret",'$66salt');
print "\n";
# Oops, security gone, that is not what I meant

# I meant this
print crypt("secret",'$6$salt');

[download]
You also have Digest, which is core 
#!/usr/bin/env perl
use strict;
use warnings;
use Digest;

my $algo = 'SHA-512';

sub hash {
    my $string = shift;
    my $salt;

    # bless whoever wrote this
    $salt .= join '',('.','/',(0..9),"a".."z","A".."Z")[rand 64] for (
+1..8);

    my $hasher = Digest->new($algo);

    $hasher->add($salt);
    $hasher->add($string);
    return $salt . $hasher->b64digest();
}

sub checkHash {
    # First 8 characters are salt
    my $hash = shift;
    my $string = shift;
    my $salt = substr($hash,0,8);
    my $hasher = Digest->new($algo);
    $hasher->add($salt);
    $hasher->add($string);
    return $hash eq $salt . $hasher->b64digest();
}

my $hash = hash('blahblah');
print "match" if checkHash($hash,'blahblah');

[download]
for encryption, you can xor, read more here Encryption using perl core functions only.

In reply to Re: crypto with core modules only by trippledubs
in thread crypto with core modules only by morgon

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