4da1968ce2ab082321fc2ea5b334252f2ee6767e
6 use parent qw
/Exporter/;
7 our $VERSION = '0.001';
8 our @EXPORT = qw
/process_message/;
10 use Email
::Sender
::Simple qw
/sendmail/;
11 use File
::Share qw
/dist_file/;
12 use File
::Slurp qw
/read_file/;
13 use File
::Spec
::Functions qw
/rel2abs/;
22 sub debug
{ say STDERR
@_ if $ENV{EDWARDNG_DEBUG
} }
23 sub stringify
($) { join '', map {; '>', $_ } @
{$_[0]} }
26 key
=> $ENV{EDWARDNG_KEY
},
27 maybe always_trust
=> $ENV{EDWARDNG_ALWAYS_TRUST
},
28 maybe keydir
=> $ENV{EDWARDNG_KEYDIR
},
29 maybe passphrase
=> $ENV{EDWARDNG_PASSPHRASE
},
30 maybe use_agent
=> $ENV{EDWARDNG_USE_AGENT
},
36 return first_part
$ent->parts(0) if $ent->parts;
37 stringify
[$ent->bodyhandle->as_lines]
43 my $parser = MIME
::Parser
->new;
44 $parser->decode_bodies(0);
45 $parser->output_to_core(1);
47 $msg = $in if ref $in eq 'MIME::Entity';
48 $msg = $parser->parse ($in) if ref $in eq 'IO';
49 $msg = $parser->parse_data ($in) if ref $in eq 'SCALAR';
50 $msg = $parser->parse_open ($in) unless ref $in;
51 die "Don't know how to parse $in" unless $msg;
53 if ($msg->mime_type ne 'multipart/signed' && $msg->mime_type ne 'multipart/encrypted') {
54 # PGP/Inline requires decoding
55 $parser->decode_bodies(1);
56 $msg = $parser->parse_data($msg->stringify)
60 if ($gpg->is_signed($msg)) {
61 debug
'This mail looks signed';
62 my ($code, $keyid, $email) = $gpg->verify($msg);
63 return sign_error
=> (
64 message
=> stringify
$gpg->{last_message
}) if $code;
68 message
=> stringify
$gpg->{last_message
});
71 if ($gpg->is_encrypted($msg)) {
72 debug
'This mail looks encrypted';
73 my ($code, $keyid, $email) = $gpg->decrypt($msg);
74 return encrypt_error
=> (
75 message
=> stringify
$gpg->{last_message
}) if $code;
77 plaintext
=> stringify
$gpg->{plaintext
},
78 decrypted
=> $gpg->{decrypted
},
79 message
=> stringify
$gpg->{last_message
}) unless defined $keyid;
80 return signencrypt
=> (
83 plaintext
=> stringify
$gpg->{plaintext
},
84 decrypted
=> $gpg->{decrypted
},
85 message
=> stringify
$gpg->{last_message
});
88 debug
'This mail doesn\'t seem to be signed or encrypted';
94 'always-trust!' => \
$ENV{EDWARDNG_ALWAYS_TRUST
},
95 'debug!' => \
$ENV{EDWARDNG_DEBUG
},
96 'from=s' => \
$ENV{EDWARDNG_FROM
},
97 'key=s' => \
$ENV{EDWARDNG_KEY
},
98 'keydir=s' => \
$ENV{EDWARDNG_KEYDIR
},
99 'passphrase=s' => \
$ENV{EDWARDNG_PASSPHRASE
},
100 'tmpl-path=s' => \
$ENV{EDWARDNG_TMPL_PATH
},
101 'use-agent!' => \
$ENV{EDWARDNG_USE_AGENT
},
103 my $tmpl_path = $ENV{EDWARDNG_TMPL_PATH
} // 'en';
105 my $parser = MIME
::Parser
->new;
106 $parser->decode_bodies(0);
107 $parser->output_to_core(1);
108 my $in = $parser->parse(\
*STDIN
);
109 debug
'Received mail from ', $in->get('From');
113 ($tmpl, %params) = process_message
$in
115 ($tmpl, %params) = (error
=> message
=> $_)
117 debug
"Result is $tmpl, GnuPG said:\n", $params{message
};
119 $params{plaintext
} = first_part
$params{decrypted
} if $params{decrypted
};
121 my $tt = Template
->new(INCLUDE_PATH
=> rel2abs
$tmpl_path, dist_file
'App-EdwardNG', 'tmpl');
123 $tt->process($tmpl, \
%params, \
$data);
124 my $email = MIME
::Entity
->build(
125 From
=> $ENV{EDWARDNG_FROM
},
126 To
=> $in->get('From'),
127 Subject
=> 'Re: ' . $in->get('Subject'),
130 my $email_unencrypted = $email->dup;
131 my $mg = mg always_trust
=> 1;
132 my $encrypt_failed = $mg->mime_signencrypt($email, $in->get('From') =~ /<(.*)>/);
133 debug
'Could not encrypt message, sending unencrypted. GnuPG said:', "\n", stringify
$mg->{last_message
} if $encrypt_failed;
134 sendmail
$encrypt_failed ?
$email_unencrypted : $email
144 App::EdwardNG - GnuPG email sign/encrypt testing bot
149 my ($status, %params) = process_message '/path/to/message';
150 if ($status eq 'signencrypt') {
151 say 'This message is encrypted and signed with key ', $params{keyid}, ' from ', $params{email};
152 say 'Its contents are: ', $params{plaintext};
153 } elsif ($status eq 'encrypt') {
154 say 'This message is encrypted but not signed';
155 say 'Its contents are: ', $params{plaintext};
156 } elsif ($status eq 'encrypt_error') {
157 say 'This message is encrypted but I was unable to decrypt it. GnuPG output: ', $params{message};
158 } elsif ($status eq 'sign') {
159 say 'This message is signed with key ', $params{keyid}, ' from ', $params{email};
160 } elsif ($status eq 'sign_error') {
161 say 'This message is signed but I was unable to verify the signature. GnuPG output: ', $params{message};
162 } elsif ($status eq 'plain') {
163 say 'This message is neither signed nor encrypted';
164 } elsif ($status eq 'error') {
165 say 'There was an error processing the message: ', $params{message};
170 EdwardNG is a reimplementation of the Edward reply bot referenced in L<https://emailselfdefense.fsf.org/>.
172 This module exports a single function, B<process_message>, which takes a single parameter representing the message. This parameter can be:
176 =item A filehandle reference, e.g. C<\*STDIN>.
178 =item A reference to a scalar which holds the message contents.
180 =item A scalar which represents a path to a message.
182 =item A L<MIME::Entity> object
186 The function returns a status followed by a hash. Possible results:
192 The message is neither signed nor encrypted.
194 =item sign_error, message => $message
196 The message is signed but the signature could not be verified. GnuPG output is $message.
198 =item sign, keyid => $keyid, email => $email, message => $message
200 The message is signed with key $keyid from $email. GnuPG output is $message.
202 =item encrypt_error, message => $message
204 The message is encrypted and unable to be decrypted. GnuPG output is $message.
206 =item encrypt, plaintext => $plaintext, decrypted => $decrypted, message => $message
208 The message is encrypted and unsigned. $plaintext is the decrypted message as plain text, while $decrypted is a MIME::Entity representing the decrypted message. GnuPG output is $message.
210 =item signencrypt, plaintext => $plaintext, decrypted => $decrypted, keyid => $keyid, email => $email, message => $message
212 The message is encrypted and signed with key $keyid from $email. $plaintext is the decrypted message as plain text, while $decrypted is a MIME::Entity representing the decrypted message. GnuPG output is $message.
214 =item error, message => $message
216 There was an error while processing the message. The error can be found in $message.
222 This module is configured via the %ENV hash. See the L<edwardng(1)> manpage for more information.
230 Marius Gavrilescu, E<lt>marius@ieval.roE<gt>
232 =head1 COPYRIGHT AND LICENSE
234 Copyright (C) 2014 by Fundația Ceata
236 This library is free software; you can redistribute it and/or modify
237 it under the same terms as Perl itself, either Perl version 5.18.2 or,
238 at your option, any later version of Perl 5 you may have available.
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