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        digest           => 'SHA-256',
        _nonce_generator => sub { "rOprNGfwEbeRWgbNEkqO" }
    );
    my $first = $client->first_msg();
    is( $first, "n,,n=user,r=rOprNGfwEbeRWgbNEkqO", "client first message" )
      or diag explain $client;

    # RFC7677 example server-first-message
    my $server_first =
      'r=rOprNGfwEbeRWgbNEkqO%hvYDpWUa2RaTCAfuxFIlj)hNlF$k0,s=W22ZaJ0SNY7soEsUEjb6gQ==,i=4096';
    my $final = $client->final_msg($server_first);
    is(
        $final,
        'c=biws,r=rOprNGfwEbeRWgbNEkqO%hvYDpWUa2RaTCAfuxFIlj)hNlF$k0,p=dHzbZapWIk4jUhN+Ute9ytag9zjfMHgsqmmiz7AndVQ=',
        "client final message"
    ) or diag explain $client;

    ok( $client->validate("v=6rriTRBi23WpRR/wtup+mMhUZUn/dB5nLTJRsjl95G4="),
        "server message validated" );

};

subtest "Unicode username" => sub {
    my $client = get_client(
        username         => "ram\N{U+00F3}n",
        password         => "p\N{U+00C5}ssword",
        _nonce_generator => sub { "cT4Z0nGchlcAXXkDBrYFlC7b3bXA24xr" }
    );
    my $first = $client->first_msg();
    is(
        $first,
        "n,,n=ram\N{U+00F3}n,r=cT4Z0nGchlcAXXkDBrYFlC7b3bXA24xr",
        "client first message"
    ) or diag explain $client;

    my $server_first =
      "r=cT4Z0nGchlcAXXkDBrYFlC7b3bXA24xrB3rw8xNSLYx23V0qdkD/t7ZjoUcyDrTy,s=c2FsdA==,i=4096";
    my $final = $client->final_msg($server_first);
    is(
        $final,
        'c=biws,r=cT4Z0nGchlcAXXkDBrYFlC7b3bXA24xrB3rw8xNSLYx23V0qdkD/t7ZjoUcyDrTy,p=lfZL47BCT5wdBisDystprtNLsbA=',
        "client final message"
    ) or diag explain $client;

    ok( $client->validate("v=etGS4QFClYMJTMeRBMs0lnWRmV8="),
        "server message validated" );

};

subtest "Minimum iteration count" => sub {
    {
        # force client nonce to match RFC5802 example
        my $client = get_client( _nonce_generator => sub { "fyko+d2lbbFgONRv9qkxdawL" } );
        my $first = $client->first_msg();

        # RFC5802 example server-first-message, with too low iteration count
        my $server_first =
          "r=fyko+d2lbbFgONRv9qkxdawL3rfcNHYJY1ZVvWVs7j,s=QSXCR+Q6sek8bf92,i=4095";
        like(
            exception { $client->final_msg($server_first) },
            qr/requested 4095 iterations, less than/,
            "Default iteration count"
        );
    }

    {
        # force client nonce to match RFC5802 example
        my $client = get_client(
            _nonce_generator        => sub { "fyko+d2lbbFgONRv9qkxdawL" },
            minimum_iteration_count => 8192
        );
        my $first = $client->first_msg();

        # RFC5802 example server-first-message, with too low iteration count
        my $server_first =
          "r=fyko+d2lbbFgONRv9qkxdawL3rfcNHYJY1ZVvWVs7j,s=QSXCR+Q6sek8bf92,i=8191";
        like(
            exception { $client->final_msg($server_first) },
            qr/requested 8191 iterations, less than/,
            "Custom iteration count"
        );
    }
};

done_testing;
#
# This file is part of Authen-SCRAM
#
# This software is Copyright (c) 2014 by David Golden.
#
# This is free software, licensed under:
#
#   The Apache License, Version 2.0, January 2004
#

# vim: ts=4 sts=4 sw=4 et: