package Mail::GPG::Test;

# $Id: Test.pm,v 1.6 2006/11/18 08:48:28 joern Exp $

use strict;

use Mail::GPG;
use MIME::Entity;
use MIME::Parser;
use Data::Dumper;
use File::Path;

use File::Temp qw(tempdir);

my $TIMEIT = 0;

our $DUMPDIR;

BEGIN {
  $DUMPDIR  = $ENV{DUMPDIR} || './mail-gpg-test';

  if (not -d $DUMPDIR ) {
    File::Path::make_path($DUMPDIR) or die "Cannot create '$DUMPDIR' - $!";
  }
}



my $has_encode = eval { require Encode; 1 };

sub get_gpg_home_dir            { shift->{gpg_home_dir}                 }
sub get_use_long_key_ids        { shift->{use_long_key_ids}             }

sub set_gpg_home_dir            { shift->{gpg_home_dir}         = $_[1] }
sub set_use_long_key_ids        { shift->{use_long_key_ids}     = $_[1] }

#-- These methods return information about the shipped test key.
#-- The email adress has a German umlaut and colons
#-- to test the proper decoding of gpg --list-keys output.
sub get_key_id                  { $_[0]->get_use_long_key_ids ?
                                  '062F00DAE20F5035' : 'E20F5035' }
sub get_key_sub_id              { $_[0]->get_use_long_key_ids ?
                                  '6C187D0F196ED9E3' : '196ED9E3' }
sub get_key_mail                { 'Jörn Reder Mail::GPG Test Key <mailgpg@localdomain>' }
sub get_passphrase              { 'test' }

sub new {
    my $class = shift;
    my %par = @_;
    my ($use_long_key_ids) = $par{'use_long_key_ids'};

    my $gpg_home_dir = tempdir("mgpgXXXX");

    my $self = bless {
        gpg_home_dir     => $gpg_home_dir,
        use_long_key_ids => $use_long_key_ids,
    }, $class;

    return $self;
}

sub DESTROY {
    my $self = shift;

    #-- tempdir ( CLEANUP => 1 ) seem not to work if
    #-- an exception occured, so we use this destructor
    #-- to remove the gpg home dir on exit.
    rmtree( [ $self->get_gpg_home_dir ], 0, 0 );

    1;
}

sub init {
    my $self = shift;

    my $gpg_home_dir = $self->get_gpg_home_dir;

    my $command = "gpg --batch --no-tty --homedir $gpg_home_dir"
        . "    --import t/mgpg-test-key.pub.asc"
        . "    >/dev/null 2>&1 && "
        . "gpg --batch --no-tty --homedir $gpg_home_dir"
        . "    --allow-secret-key-import"
        . "    --import t/mgpg-test-key.sec.asc"
        . "    >/dev/null 2>&1 && echo MGPG_OK";

    my $output = qx[ $command ];

    return $output =~ /MGPG_OK/;
}

sub get_mail_gpg {
    my $self = shift;

    my $mg = Mail::GPG->new(
        debug              => $ENV{DUMPFILES},
        default_key_id     => $self->get_key_id,
        default_passphrase => $self->get_passphrase,
        use_long_key_ids   => $self->get_use_long_key_ids,
        gnupg_hash_init    => {
            homedir      => $self->get_gpg_home_dir,
            always_trust => 1,

        },
    );

    return $mg;
}

sub get_test_mail_body {
    "This is a test mail body,\n"
        . "with special characters: ÄÜÖß\n"
        . "and lines with whitespace   \n"
        . "and a cr/lf line ending\r\n" . "and\n"
        . "From at the beginning\n"
        . "Let's see what happens.\n";
}

sub print_parse_entity {
    my $self = shift;
    my %par = @_;
    my  ($entity, $modify) =
    @par{'entity','modify'};

    my ( $fh, $file ) = File::Temp::tempfile(
        'mgpgXXXXXXXX',
        DIR    => $DUMPDIR,
        UNLINK => 1,
    );

    $entity->print($fh);
    close $fh;

    if ($modify) {
        open( $fh, $file ) or die "can't read $file";
        my $data = join( '', <$fh> );
        close $fh;
        $data =~ s/whitespace/spacewhite/g;
        $data =~ tr/L/l/;
        open( $fh, ">$file" ) or die "can't write $file";
        print $fh $data;
        close $fh;
    }

    open( $fh, $file ) or die "can't read $file";
    my $mg = $self->get_mail_gpg;
    my $parsed_entity = $mg->parse( mail_fh => $fh );
    close $fh;;
    return $parsed_entity;
}

sub sign_test {
    my $self = shift;
    my %par = @_;
    my  ($mg, $method, $encoding, $attach, $invalid) =
    @par{'mg','method','encoding','attach','invalid'};

    $attach  = "" if not defined $attach;
    $invalid = "" if not defined $invalid;

    $attach  = " (w/ attachmnt)" if $attach;
    $invalid = ""                if not $invalid;
    $invalid = " (invalid)"      if $invalid;

    my $test_name = "$method:$encoding Signature $attach$invalid";

    my $entity = MIME::Entity->build(
        From     => $self->get_key_mail,
        Subject  => "Mail::GPG Testmail",
        Data     => [ $self->get_test_mail_body ],
        Encoding => $encoding,
        Charset  => "iso-8859-1",
    );

    if ($attach) {
        $entity->attach(
            Type        => "application/octet-stream",
            Disposition => "inline",
            Data        => [ "A great Ättächment.  \n" x 10 ],
            Encoding    => "base64",
        );
    }

    my $signed_entity = $mg->$method( entity => $entity );

    if ( not $mg->is_signed( entity => $signed_entity ) ) {
        ok( 0, "$test_name: Entity not signed" );
        return;
    }

    my $signed_entity_string = $signed_entity->as_string;

    my $parsed_entity = $self->print_parse_entity(
        entity        => $signed_entity,
        modify        => $invalid,
    );

    if ( $ENV{DUMPFILES} ) {
        my $tmp_file = "$DUMPDIR/$method-$encoding-"
            . ( $attach  ? "attach"  : "noattach" ) . "-"
            . ( $invalid ? "invalid" : "valid" );

        open( SEND, ">$tmp_file.send" );
        open( RETR, ">$tmp_file.retr" );

        print SEND $signed_entity->as_string;
        print RETR $parsed_entity->as_string;

        close SEND;
        close RETR;
    }

    if (    not $invalid
        and not( $encoding eq 'base64' and $method eq 'armor_sign' ) ) {
        if ( !Mail::GPG->is_signed( entity => $signed_entity ) ) {
            ok( 0, "$test_name: MIME::Entity sign check failed" );
            return;
        }
        if (!Mail::GPG->is_signed_quick(
                mail_sref => \$signed_entity_string
            )
            ) {
            ok( 0, "$test_name: mail_sref sign check failed" );
            return;
        }
        my $tmp_file = "$DUMPDIR/Mail-GPG-Test-$$.txt";
        open( TMP, "+>$tmp_file" ) or die "can't write $tmp_file";
        print TMP $signed_entity_string;
        if ( !Mail::GPG->is_signed_quick( mail_fh => \*TMP ) ) {
            ok( 0, "$test_name: mail_fh sign check failed" );
            close TMP;
            unlink $tmp_file;
            return;
        }
        close TMP;
        unlink $tmp_file;
    }

    my $result = eval { $mg->verify( entity => $parsed_entity, ); };

    my $error = $@;

    if ( not $invalid and $@ ) {
        ok( 0, "$test_name: $@" );
        return;
    }

    if (not $invalid
        and (  $result->get_sign_key_id ne $self->get_key_id
            or $result->get_sign_mail ne $self->get_key_mail )
        ) {
        ok( 0, "Key/Email wrong" );
        return;
    }

    if ( not $invalid and $result->get_sign_trust ne '-' ) {
        ok( 0, "Owner trust wrong" );
    }

    if ($invalid) {
        if ($error) {
            ok( 1, $test_name );
        }
        else {
            ok( !$result->get_sign_ok, $test_name );
        }
    }
    else {
        ok( $result->get_sign_ok, $test_name );
    }

    1;
}

sub enc_test {
    my $self = shift;
    my %par = @_;
    my  ($mg, $method, $encoding, $attach) =
    @par{'mg','method','encoding','attach'};

    $attach = " (w/ attachmnt)" if $attach;
    $attach = "" if not defined $attach;

    my $entity = MIME::Entity->build(
        From     => $self->get_key_mail,
        Subject  => "Mail::GPG Testmail",
        Data     => [ $self->get_test_mail_body ],
        Encoding => $encoding,
        Charset  => "iso-8859-1",
    );

    if ($attach) {
        $entity->attach(
            Type        => "application/octet-stream",
            Disposition => "inline",
            Data        => [ "A great Ättächment.  \n" x 10 ],
            Encoding    => "base64",
        );
    }

    my $enc_entity = $mg->$method(
        entity     => $entity,
        recipients => [ $self->get_key_mail ],
    );

    if ( not $mg->is_encrypted( entity => $enc_entity ) ) {
        ok( 0, "Entity not encrypted" );
        return;
    }

    my $parsed_entity = $self->print_parse_entity(
        entity        => $enc_entity,
    );

    my ( $dec_key_id, $dec_key_mail )
        = $mg->get_decrypt_key( entity => $parsed_entity, );

    if ($has_encode) {
      if ( $dec_key_id ne $self->get_key_id ) {
        ok( 0,
            "Decryption key wrong: "
            . "$dec_key_id=="
            . $self->get_key_id
          );
        return;
      }
      if ( $dec_key_mail ne $self->get_key_mail ) {
        ok( 0,
            "Decryption email wrong: "
            . "$dec_key_mail=="
            . $self->get_key_mail
          );
        return;
      }
    }
    else {
        if ( $dec_key_id ne $self->get_key_id ) {
            ok( 0,
                      "Decryption key or email wrong: "
                    . "$dec_key_id=="
                    . $self->get_key_id );
            return;
        }
    }

    my ( $dec_entity, $result )
        = eval { $mg->decrypt( entity => $parsed_entity, ); };

    if ( $ENV{DUMPFILES} ) {
        my $tmp_file
            = "$DUMPDIR/$method-$encoding-" . ( $attach ? "attach" : "noattach" );

        open( SEND, ">$tmp_file.send" );
        open( RETR, ">$tmp_file.retr" );
    }

    if (    $method =~ /encrypt/
        and $method !~ /sign/
        and (  $result->get_is_signed
            or $result->get_sign_key_id
            or $result->get_sign_mail
            or $result->get_sign_ok )
        ) {
        ok( 0, "Signature reported but message not signed" );
        return;
    }

    if ($method =~ /sign/
        and (  not $result->get_sign_ok
            or not $result->get_is_signed
            or not $result->get_sign_key_id eq $self->get_key_id
            or not $result->get_sign_mail   eq $self->get_key_mail )
        ) {
        ok( 0, "Signature bad" );
        return;
    }

    if ($has_encode) {
        if (   not $result->get_is_encrypted
            or not $result->get_enc_ok
            or not $result->get_enc_key_id eq $self->get_key_sub_id
            or not $result->get_enc_mail eq $self->get_key_mail ) {
            ok( 0, "Decryption failed" );
            return;
        }
    }
    else {
        if (   not $result->get_is_encrypted
            or not $result->get_enc_ok
            or not $result->get_enc_key_id eq $self->get_key_sub_id ) {
            ok( 0, "Decryption failed" );
            return;
        }
    }
    if ( $method =~ /armor/ ) {
        my $entity_body = $entity->bodyhandle->as_string;
        ok( $dec_entity->bodyhandle->as_string eq $entity_body,
            "$method:$encoding Decryption$attach" );
        if ( $ENV{DUMPFILES} ) {
            print SEND $entity_body;
            print RETR $dec_entity->bodyhandle->as_string;
        }
    }
    elsif ( not $attach ) {
        ok( $dec_entity->body_as_string eq $entity->body_as_string,
            "$method:$encoding Decryption$attach" );
        if ( $ENV{DUMPFILES} ) {
            print SEND $entity->body_as_string;
            print RETR $dec_entity->body_as_string;
        }
    }
    else {
        ok( (   $dec_entity->parts(0)->body_as_string eq
                    $entity->parts(0)->body_as_string
                    and $dec_entity->parts(1)->body_as_string eq
                    $entity->parts(1)->body_as_string
            ),
            "$method:$encoding Decryption$attach"
        );
        if ( $ENV{DUMPFILES} ) {
            print SEND $entity->body_as_string;
            print RETR $dec_entity->body_as_string;
        }
    }

    if ( $ENV{DUMPFILES} ) {
        close SEND;
        close RETR;
    }

    1;
}

sub big_test {
    my $self = shift;
    my %par  = @_;
    my ($mg, $chunks) = @par{'mg','chunks'};

    $chunks ||= 200000;

    srand($chunks);

    my $line = (join "", map { chr(32+rand(80)) } (1..40))."\n";

    my @big_data = ( $line x $chunks );

    my $entity = MIME::Entity->build(
        From     => $self->get_key_mail,
        Subject  => "Mail::GPG Testmail",
        Data     => \@big_data,
        Encoding => "base64",
        Charset  => "iso-8859-1",
    );

my ($start, $dur);
if ( $TIMEIT ) {
use Time::HiRes qw(time);
$start = time();
print "encrypt... ";
}
    my $enc_entity = $mg->mime_sign_encrypt(
        entity     => $entity,
        recipients => [ $self->get_key_mail ],
    );
if ($TIMEIT ) {
$dur = time-$start;
print "$dur !\n";
}
    if ( not $mg->is_encrypted( entity => $enc_entity ) ) {
        ok( 0, "Entity not encrypted" );
        return;
    }

if ($TIMEIT ) {
$start = time();
print "print_parse... ";
}
    my $parsed_entity = $self->print_parse_entity(
        entity        => $enc_entity,
    );
if ($TIMEIT ) {
$dur = time-$start;
print "$dur !\n";
}

if ($TIMEIT ) {
$start = time();
print "get_decrypt_key... ";
}
    my ( $dec_key_id, $dec_key_mail )
        = $mg->get_decrypt_key( entity => $parsed_entity, );
if ($TIMEIT ) {
$dur = time-$start;
print "$dur !\n";
}

    if ($has_encode) {
      if ( $dec_key_id ne $self->get_key_id ) {
        ok( 0,
            "Decryption - key wrong: "
            . "$dec_key_id=="
            . $self->get_key_id );
        return;
      }

      if ( $dec_key_mail ne $self->get_key_mail ) {
        ok( 0,
            "Decryption - email wrong: "
            . "$dec_key_mail=="
            . $self->get_key_mail );
        return;
      }


      }
    else {
        if ( $dec_key_id ne $self->get_key_id ) {
            ok( 0,
                      "Decryption key or email wrong: "
                    . "$dec_key_id=="
                    . $self->get_key_id );
            return;
        }
    }

if ($TIMEIT ) {
print "decrypt... ";
$start = time();
}
    my ( $dec_entity, $result )
        = eval { $mg->decrypt( entity => $parsed_entity, ); };
if ($TIMEIT ) {
$dur = time-$start;
print "$dur !\n";
}
    if (   not $result->get_sign_ok
        or not $result->get_is_signed
        or not $result->get_sign_key_id eq $self->get_key_id
        or not $result->get_sign_mail eq $self->get_key_mail ) {
        ok( 0, "Signature bad" );
        return;
    }

    if ($has_encode) {
        if (   not $result->get_is_encrypted
            or not $result->get_enc_ok
            or not $result->get_enc_key_id eq $self->get_key_sub_id
            or not $result->get_enc_mail eq $self->get_key_mail ) {
            ok( 0, "Decryption failed" );
            return;
        }
    }
    else {
        if (   not $result->get_is_encrypted
            or not $result->get_enc_ok
            or not $result->get_enc_key_id eq $self->get_key_sub_id ) {
            ok( 0, "Decryption failed" );
            return;
        }
    }

    ok( 1, "Big entity" );

    1;
}

1;