AnyEvent
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lib/AnyEvent/TLS.pm view on Meta::CPAN
package AnyEvent::TLS;
use Carp qw(croak);
use Scalar::Util ();
use AnyEvent (); BEGIN { AnyEvent::common_sense }
use AnyEvent::Util ();
use Net::SSLeay;
=head1 NAME
AnyEvent::TLS - SSLv2/SSLv3/TLSv1 contexts for use in AnyEvent::Handle
=cut
our $VERSION = $AnyEvent::VERSION;
=head1 SYNOPSIS
# via AnyEvent::Handle
use AnyEvent;
use AnyEvent::Handle;
use AnyEvent::Socket;
# simple https-client
my $handle = new AnyEvent::Handle
connect => [$host, $port],
tls => "connect",
tls_ctx => { verify => 1, verify_peername => "https" },
...
# simple ssl-server
tcp_server undef, $port, sub {
my ($fh) = @_;
my $handle = new AnyEvent::Handle
fh => $fh,
tls => "accept",
tls_ctx => { cert_file => "my-server-keycert.pem" },
...
# directly
my $tls = new AnyEvent::TLS
verify => 1,
verify_peername => "ldaps",
ca_file => "/etc/cacertificates.pem";
=head1 DESCRIPTION
This module is a helper module that implements TLS/SSL (Transport Layer
Security/Secure Sockets Layer) contexts. A TLS context is a common set of
configuration values for use in establishing TLS connections.
For some quick facts about SSL/TLS, see the section of the same name near
the end of the document.
A single TLS context can be used for any number of TLS connections that
wish to use the same certificates, policies etc.
Note that this module is inherently tied to L<Net::SSLeay>, as this
library is used to implement it. Since that perl module is rather ugly,
and OpenSSL has a rather ugly license, AnyEvent might switch TLS providers
at some future point, at which this API will change dramatically, at least
in the Net::SSLeay-specific parts (most constructor arguments should still
work, though).
Although this module does not require a specific version of Net::SSLeay,
many features will gradually stop working, or bugs will be introduced with
old versions (verification might succeed when it shouldn't - this is a
real security issue). Version 1.35 is recommended, 1.33 should work, 1.32
might, and older versions are yours to keep.
=head1 USAGE EXAMPLES
See the L<AnyEvent::Handle> manpage, NONFREQUENTLY ASKED QUESTIONS, for
some actual usage examples.
=head1 PUBLIC METHODS AND FUNCTIONS
=over 4
=cut
our $REF_IDX; # our session ex_data id
# create temp file, populate it, and return a guard and filename
sub _tmpfile($) {
require File::Temp unless $File::Temp::VERSION;
# File::Temp opens the file with mode 0600
my ($fh, $path) = File::Temp::tempfile ("aetlsXXXXXXXXX", TMPDIR => 1, EXLOCK => 0);
my $guard = AnyEvent::Util::guard { unlink $path };
syswrite $fh, $_[0];
close $fh;
($path, $guard)
}
our %DH_PARAMS = (
# These are the DH parameters from "Assigned Number for SKIP Protocols"
# (http://www.skip-vpn.org/spec/numbers.html).
# (or http://web.archive.org/web/20011212141438/http://www.skip-vpn.org/spec/numbers.html#params)
# See there for how they were generated.
# Note that g might not be a generator,
# but this is not a problem since p is a safe prime.
skip512 => "MEYCQQD1Kv884bEpQBgRjXyEpwpy1obEAxnIByl6ypUM2Zafq9AKUJsCRtMIPWak|XUGfnHy9iUsiGSa6q6Jew1XpKgVfAgEC",
skip1024 => "MIGHAoGBAPSI/VhOSdvNILSd5JEHNmszbDgNRR0PfIizHHxbLY7288kjwEPwpVsY|jY67VYy4XTjTNP18F1dDox0YbN4zISy1Kv884bEpQBgRjXyEpwpy1obEAxnIByl6|ypUM2Zafq9AKUJsCRtMIPWakXUGfnHy9iUsiGSa6q6Jew1XpL3jHAgEC",
skip2048 => "MIIBCAKCAQEA9kJXtwh/CBdyorrWqULzBej5UxE5T7bxbrlLOCDaAadWoxTpj0BV|89AHxstDqZSt90xkhkn4DIO9ZekX1KHTUPj1WV/cdlJPPT2N286Z4VeSWc39uK50|T8X8dryDxUcwYc58yWb/Ffm7/ZFexwGq01uejaClcjrUGvC/RgBYK+X0iP1YTknb|zSC0neSRBzZrM2w4DUUdD3yIsxx8Wy2O9vPJI8B...
skip4096 => "MIICCAKCAgEA+hRyUsFN4VpJ1O8JLcCo/VWr19k3BCgJ4uk+d+KhehjdRqNDNyOQ|l/MOyQNQfWXPeGKmOmIig6Ev/nm6Nf9Z2B1h3R4hExf+zTiHnvVPeRBhjdQi81rt|Xeoh6TNrSBIKIHfUJWBh3va0TxxjQIs6IZOLeVNRLMqzeylWqMf49HsIXqbcokUS|Vt1BkvLdW48j8PPv5DsKRN3tloTxqDJGo9tKvj1...
# generated on a linux desktop with openssl using /dev/urandom - entropy_avail was >= 3600 each time
# the 8192 bit key took 25 hours to generate :/
schmorp1024 => "MIGHAoGBAN+GjqAhNxLesSuGfDzYe6HdexXtHuxe85umshfPHfnmLSkGWl/FE27+|v+50mwY5XaNnCmo1VvGju4iTKxWoZTGgslUSc8KX197XWAXIpab8ESyg442if9Kr|vSOuu0fopwvvTOgHK8mkEWI4joU5G4/MQy+pnC5NIEVBP4HtGiTrAgEC",
schmorp1539 => "MIHHAoHBByJzpVGUsXysX8w/+uuXRUCL9exhAixoHkaJU5lf4noJUtp9F0yr/5rb|hF8M9mSZJ+RlPyB+Zt37GPp1WQDO1+/2yZJX9kHE3+h5JCRoR8PKc2G+ts9jhM7r|CnTQ0z0b6s12Pusf+UhQPwLust4JAYE/LPuTK8yFiVx5L2a+aZhGMVlYN/12SEtY|jRl3lGXdZj9g8E2PzTQbA9CGy5dGIvz/ENTz...
schmorp2048 => "MIIBCAKCAQEAhR5Fn9h3Tgnc+q4o3CMkZtre3lLUyDT+1bf3aiVOt22JdDQndZLc|FeKz8AqliB3UIgNExc6oDtuG4znKPgklfOnHv/a9tl1AYQbV+QFM/E0jYl6oG8tF|Epgxezt1GCivvtu64ql0s213wr64QffNMt3hva8lNqK1PXfqp13PzzLzAVsfghrv|fMAX7/bYm1T5fAJdcah6FeZkKof+mqbs8HtR...
schmorp4096 => "MIICCAKCAgEA5WwA5lQg09YRYqc/JILCd2AfBmYBkF19wmCEJB8G3JhTxv8EGvYk|xyP2ecKVUvHTG8Xw/qpW8nRqzPIyV8QRf6YFYSf33Qnx2xYhcnqOumU3nfC0SNOL|/w2q1BA9BbHtW4574P+6hOQx9ftRtbtZ2HPKBMRcAKGjpYZiKopv0+UAM4NpEC2p|bfajp7pyVLeb/Aqm/oWP3L63wPlY1SDp+XRz...
schmorp8192 => "MIIECAKCBAEA/SAEbRSSLenVxoInHiltm/ztSwehGOhOiUKfzDcKlRBZHlCC9jBl|S/aeklM6Ucg8E6J2bnfoh6CAdnE/glQOn6CifhZr8X/rnlL9/eP+r9m+aiAw4l0D|MBd8BondbEqwTZthMmLtx0SslnevsFAZ1Cj8WgmUNaSPOukvJ1N7aQ98U+E99Pw3|VG8ANBydXqLqW2sogS8FtZoMbVywcQuaGmC7...
# finite field dhe parameters, some taken from firefox, some directly from RFC 7919
ffdhe2048 => "MIIBCAKCAQEA//////////+t+FRYortKmq/cViAnPTzx2LnFg84tNpWp4TZBFGQz+8yTnc4kmz75fS/jY2MMddj2gbICrsRhetPfHtXV/WVhJDP1H18GbtCFY2VVPe0a87VXE15/V8k1mE8McODmi3fipona8+/och3xWKE2rec1MKzKT0g6eXq8CrGCsyT7YdEIqUuyyOP7uWrat2DX9GgdT0Kj3jlN9K5W7edjc...
ffdhe3072 => "MIIBiAKCAYEA//////////+t+FRYortKmq/cViAnPTzx2LnFg84tNpWp4TZBFGQz+8yTnc4kmz75fS/jY2MMddj2gbICrsRhetPfHtXV/WVhJDP1H18GbtCFY2VVPe0a87VXE15/V8k1mE8McODmi3fipona8+/och3xWKE2rec1MKzKT0g6eXq8CrGCsyT7YdEIqUuyyOP7uWrat2DX9GgdT0Kj3jlN9K5W7edjc...
ffdhe4096 => "MIICCAKCAgEA///////////JD9qiIWjCNMTGYouA3BzRKQJOCIpnzHQCC76mOxObIlFKCHmONATd75UZs806QxswKwpt8l8UN0/hNW1tUcJF5IW1dmJefsb0TELppjftawv/XLb0Brft7jhr+1qJn6WunyQRfEsf5kkoZlHs5Fs9wgB8uKFjvwWY2kg2HFXTmmkWP6j9JM9fg2VdI9yjrZYcYvNWIIVSu57VKQdwl...
ffdhe6144 =>
"MIIDCAKCAwEA//////////+t+FRYortKmq/cViAnPTzx2LnFg84tNpWp4TZBFGQz+8yTnc4kmz75fS/jY2MMddj2gbICrsRhetPfHtXV/WVhJDP1H18GbtCFY2VVPe0a87VXE15/V8k1mE8McODmi3fipona8+/och3xWKE2rec1MKzKT0g6eXq8CrGCsyT7YdEIqUuyyOP7uWrat2DX9GgdT0Kj3jlN9K5W7edjcrsZCwenyO4KbX...
ffdhe8192 => "MIIECAKCBAEA//////////+t+FRYortKmq/cViAnPTzx2LnFg84tNpWp4TZBFGQz+8yTnc4kmz75fS/jY2MMddj2gbICrsRhetPfHtXV/WVhJDP1H18GbtCFY2VVPe0a87VXE15/V8k1mE8McODmi3fipona8+/och3xWKE2rec1MKzKT0g6eXq8CrGCsyT7YdEIqUuyyOP7uWrat2DX9GgdT0Kj3jlN9K5W7edjc...
);
=item $tls = new AnyEvent::TLS key => value...
The constructor supports these arguments (all as key => value pairs).
=over 4
=item method => "SSLv2" | "SSLv3" | "TLSv1" | "TLSv1_1" | "TLSv1_2" | "any"
The protocol parser to use. C<SSLv2>, C<SSLv3>, C<TLSv1>, C<TLSv1_1>
and C<TLSv1_2> will use a parser for those protocols only (so will
I<not> accept or create connections with/to other protocol versions),
while C<any> (the default) uses a parser capable of all three
protocols.
The default is to use C<"any"> but disable SSLv2. This has the effect of
sending a SSLv2 hello, indicating the support for SSLv3 and TLSv1, but not
actually negotiating an (insecure) SSLv2 connection.
Specifying a specific version is almost always wrong to use for a server
speaking to a wide variety of clients (e.g. web browsers), and often wrong
for a client. If you only want to allow a specific protocol version, use
the C<sslv2>, C<sslv3>, C<tlsv1>, C<tlsv1_1> or C<tlsv1_2> arguments instead.
For new services it is usually a good idea to enforce a C<TLSv1> method
from the beginning.
C<TLSv1_1> and C<TLSv1_2> require L<Net::SSLeay> >= 1.55 and OpenSSL
>= 1.0.1. Check the L<Net::SSLeay> and OpenSSL documentations for more
details.
=item sslv2 => $enabled
Enable or disable SSLv2 (normally I<disabled>).
=item sslv3 => $enabled
Enable or disable SSLv3 (normally I<enabled>).
=item tlsv1 => $enabled
Enable or disable TLSv1 (normally I<enabled>).
=item tlsv1_1 => $enabled
Enable or disable TLSv1_1 (normally I<enabled>).
This requires L<Net::SSLeay> >= 1.55 and OpenSSL >= 1.0.1. Check the
L<Net::SSLeay> and OpenSSL documentations for more details.
=item tlsv1_2 => $enabled
Enable or disable TLSv1_2 (normally I<enabled>).
This requires L<Net::SSLeay> >= 1.55 and OpenSSL >= 1.0.1. Check the
L<Net::SSLeay> and OpenSSL documentations for more details.
=item verify => $enable
Enable or disable peer certificate checking (default is I<disabled>, which
is I<not recommended>).
This is the "master switch" for all verify-related parameters and
functions.
If it is disabled, then no peer certificate verification will be done
- the connection will be encrypted, but the peer certificate won't be
verified against any known CAs, or whether it is still valid or not. No
peername verification or custom verification will be done either.
If enabled, then the peer certificate (required in client mode, optional
in server mode, see C<verify_require_client_cert>) will be checked against
its CA certificate chain - that means there must be a signing chain from
the peer certificate to any of the CA certificates you trust locally, as
specified by the C<ca_file> and/or C<ca_path> and/or C<ca_cert> parameters
(or the system default CA repository, if all of those parameters are
missing - see also the L<AnyEvent> manpage for the description of
PERL_ANYEVENT_CA_FILE).
Other basic checks, such as checking the validity period, will also be
done, as well as optional peername/hostname/common name verification
C<verify_peername>.
An optional C<verify_cb> callback can also be set, which will be invoked
with the verification results, and which can override the decision.
=item verify_require_client_cert => $enable
Enable or disable mandatory client certificates (default is
I<disabled>). When this mode is enabled, then a client certificate will be
required in server mode (a server certificate is mandatory, so in client
mode, this switch has no effect).
=item verify_peername => $scheme | $callback->($tls, $cert, $peername)
TLS only protects the data that is sent - it cannot automatically verify
lib/AnyEvent/TLS.pm view on Meta::CPAN
This callback will only be called when verification is enabled (C<< verify
=> 1 >>).
C<$tls> is the C<AnyEvent::TLS> object associated with the session,
while C<$ref> is whatever the user associated with the session (usually
an L<AnyEvent::Handle> object when used by AnyEvent::Handle).
C<$depth> is the current verification depth - C<$depth = 0> means the
certificate to verify is the peer certificate, higher levels are its CA
certificate and so on. In most cases, you can just return C<$preverify_ok>
if the C<$depth> is non-zero:
verify_cb => sub {
my ($tls, $ref, $cn, $depth, $preverify_ok, $x509_store_ctx, $cert) = @_;
return $preverify_ok
if $depth;
# more verification
},
C<$preverify_ok> is true iff the basic verification of the certificates
was successful (a valid CA chain must exist, the certificate has passed
basic validity checks, peername verification succeeded).
C<$x509_store_ctx> is the Net::SSLeay::X509_CTX> object.
C<$cert> is the C<Net::SSLeay::X509> object representing the
peer certificate, or zero if there was an error. You can call
C<AnyEvent::TLS::certname $cert> to get a nice user-readable string to
identify the certificate.
The callback must return either C<0> to indicate failure, or C<1> to
indicate success.
=item verify_client_once => $enable
Enable or disable skipping the client certificate verification on
renegotiations (default is I<disabled>, the certificate will always be
checked). Only makes sense in server mode.
=item ca_file => $path
If this parameter is specified and non-empty, it will be the path to a
file with (server) CA certificates in PEM format that will be loaded. Each
certificate will look like:
-----BEGIN CERTIFICATE-----
... (CA certificate in base64 encoding) ...
-----END CERTIFICATE-----
You have to enable verify mode (C<< verify => 1 >>) for this parameter to
have any effect.
=item ca_path => $path
If this parameter is specified and non-empty, it will be
the path to a directory with hashed CA certificate files in
PEM format. When the ca certificate is being verified, the
certificate will be hashed and looked up in that directory (see
L<http://www.openssl.org/docs/ssl/SSL_CTX_load_verify_locations.html> for
details)
The certificates specified via C<ca_file> take precedence over the ones
found in C<ca_path>.
You have to enable verify mode (C<< verify => 1 >>) for this parameter to
have any effect.
=item ca_cert => $string
In addition or instead of using C<ca_file> and/or C<ca_path>, you can
also use C<ca_cert> to directly specify the CA certificates (there can be
multiple) in PEM format, in a string.
=item check_crl => $enable
Enable or disable certificate revocation list checking. If enabled, then
peer certificates will be checked against a list of revoked certificates
issued by the CA. The revocation lists will be expected in the C<ca_path>
directory.
certificate verification will fail if this is enabled but no revocation
list was found.
This requires OpenSSL >= 0.9.7b. Check the OpenSSL documentation for more
details.
=item key_file => $path
Path to the local private key file in PEM format (might be a combined
certificate/private key file).
The local certificate is used to authenticate against the peer - servers
mandatorily need a certificate and key, clients can use a certificate and
key optionally to authenticate, e.g. for log-in purposes.
The key in the file should look similar this:
-----BEGIN RSA PRIVATE KEY-----
...header data
... (key data in base64 encoding) ...
-----END RSA PRIVATE KEY-----
=item key => $string
The private key string in PEM format (see C<key_file>, only one of
C<key_file> or C<key> can be specified).
The idea behind being able to specify a string is to avoid blocking in
I/O. Unfortunately, Net::SSLeay fails to implement any interface to the
needed OpenSSL functionality, this is currently implemented by writing to
a temporary file.
=item cert_file => $path
The path to the local certificate file in PEM format (might be a combined
certificate/private key file, including chained certificates).
The local certificate (and key) are used to authenticate against the
peer - servers mandatorily need a certificate and key, clients can use
lib/AnyEvent/TLS.pm view on Meta::CPAN
is supposed to return the password.
=item dh_file => $path
Path to a file containing Diffie-Hellman parameters in PEM format, for
use in servers. See also C<dh> on how to specify them directly, or use a
pre-generated set.
Diffie-Hellman key exchange generates temporary encryption keys that
are not transferred over the connection, which means that even if the
certificate key(s) are made public at a later time and a full dump of the
connection exists, the key still cannot be deduced.
These ciphers are only available with SSLv3 and later (which is the
default with AnyEvent::TLS), and are only used in server/accept
mode. Anonymous DH protocols are usually disabled by default, and usually
not even compiled into the underlying library, as they provide no direct
protection against man-in-the-middle attacks. The same is true for the
common practise of self-signed certificates that you have to accept first,
of course.
=item dh => $string
Specify the Diffie-Hellman parameters in PEM format directly as a string
(see C<dh_file>), the default is C<ffdhe3072> unless C<dh_file> was
specified.
AnyEvent::TLS supports supports a number of precomputed DH parameters,
since computing them is expensive. They are:
# from RFC 7919 - recommended
ffdhe2048, ffdhe3072, ffdhe4096, ffdhe6144, ffdhe8192
# from "Assigned Number for SKIP Protocols"
skip512, skip1024, skip2048, skip4096
# from schmorp
schmorp1024, schmorp1539, schmorp2048, schmorp4096, schmorp8192
It is said that 2048 bit DH parameters are safe till 2030, and DH
parameters shorter than 900 bits are totally insecure.
To disable DH protocols completely, specify C<undef> as C<dh> parameter.
=item dh_single_use => $enable
Enables or disables "use only once" mode when using Diffie-Hellman key
exchange. When enabled (default), each time a new key is exchanged a new
Diffie-Hellman key is generated, which improves security as each key is
only used once. When disabled, the key will be created as soon as the
AnyEvent::TLS object is created and will be reused.
All the DH parameters supplied with AnyEvent::TLS should be safe with
C<dh_single_use> switched off, but YMMV.
=item cipher_list => $string
The list of ciphers to use, as a string (example:
C<AES:ALL:!aNULL:!eNULL:+RC4:@STRENGTH>). The format
of this string and its default value is documented at
L<http://www.openssl.org/docs/apps/ciphers.html#CIPHER_STRINGS>.
=item session_ticket => $enable
Enables or disables RC5077 support (Session Resumption without Server-Side
State). The default is disabled for clients, as many (buggy) TLS/SSL
servers choke on it, but enabled for servers.
When enabled and supported by the server, a session ticket will be
provided to the client, which allows fast resuming of connections.
=item prepare => $coderef->($tls)
If this argument is present, then it will be called with the new
AnyEvent::TLS object after any other initialisation has bee done, in case
you wish to fine-tune something...
=cut
#=item trust => $trust
#
#Sets the expected (root) certificate use on this context, i.e. what
#certificates to trust. The default is C<compat>, and the following strings
#are supported:
#
# compat any certifictae will do
# ssl_client only trust client certificates
# ssl_server only trust server certificates
# email only trust e-mail certificates
# object_sign only trust signing (CA) certificates
# ocsp_sign only trust ocsp signing certs
# ocsp_request only trust ocsp request certs
# purpose?
#TODO
# verify_depth?
# reuse_ctx
# session_cache_size
# session_cache
#=item debug => $level
#
#Enable or disable sending debugging output to STDERR. This is, as
#the name says, mostly for debugging. The default is taken from the
#C<PERL_ANYEVENT_TLS_DEBUG> environment variable.
#
#=cut
=back
=cut
sub init ();
#our %X509_TRUST = (
# compat => 1,
# ssl_client => 2,
# ssl_server => 3,
# email => 4,
# object_sign => 5,
# ocsp_sign => 6,
# ocsp_request => 7,
#);
BEGIN {
eval 'sub _check_tls_gt_1 (){'
. (($Net::SSLeay::VERSION >= 1.55 && Net::SSLeay::OPENSSL_VERSION_NUMBER() >= 0x1000100f) * 1)
. '}';
# as of this writing, Net::SSLeay (1.85-2) has not been ported to OpenSSL 1.1,
# but many distributions and users compile it against openssl 1.1, leading to
# many symbols not being defined because they are now enums instead of macros
# and have different prefixes.
# The only one we use is SSL_ST_OK, or TLS_ST_OK, which should be available
# as Net::SSLeay::ST_OK. If it is not callable, we define it to be 1, which
# hopefully will not change.
eval 'Net::SSLeay::ST_OK (); 1'
or *Net::SSLeay::ST_OK = sub () { 1 };
}
our %SSL_METHODS = (
any => \&Net::SSLeay::CTX_new,
sslv23 => \&Net::SSLeay::CTX_new, # deliberately undocumented
sslv2 => \&Net::SSLeay::CTX_v2_new,
sslv3 => \&Net::SSLeay::CTX_v3_new,
tlsv1 => \&Net::SSLeay::CTX_tlsv1_new,
);
# Add TLSv1_1 and TLSv1_2 if Net::SSLeay and openssl allow them
if (_check_tls_gt_1) {
$SSL_METHODS{tlsv1_1} = \&Net::SSLeay::CTX_tlsv1_1_new;
$SSL_METHODS{tlsv1_2} = \&Net::SSLeay::CTX_tlsv1_2_new;
} else {
for my $method (qw(tlsv1_1 tlsv1_2)) {
$SSL_METHODS{$method} = sub { croak "AnyEvent::TLS method '$method' requires openssl v1.0.1 and Net::SSLeay 1.55 or higher" };
}
}
sub new {
my ($class, %arg) = @_;
init unless $REF_IDX;
my $method = lc $arg{method} || "any";
my $ctx = ($SSL_METHODS{$method}
|| croak "'$method' is not a valid AnyEvent::TLS method (must be one of @{[ sort keys %SSL_METHODS ]})")->();
my $self = bless { ctx => $ctx }, $class; # to make sure it's destroyed if we croak
my $op = Net::SSLeay::OP_ALL ();
$op |= Net::SSLeay::OP_NO_SSLv2 () unless $arg{sslv2};
$op |= Net::SSLeay::OP_NO_SSLv3 () if exists $arg{sslv3} && !$arg{sslv3};
$op |= Net::SSLeay::OP_NO_TLSv1 () if exists $arg{tlsv1} && !$arg{tlsv1};
$op |= Net::SSLeay::OP_NO_TLSv1_1 () if exists $arg{tlsv1_1} && !$arg{tlsv1_1} && _check_tls_gt_1;
$op |= Net::SSLeay::OP_NO_TLSv1_2 () if exists $arg{tlsv1_2} && !$arg{tlsv1_2} && _check_tls_gt_1;
$op |= Net::SSLeay::OP_SINGLE_DH_USE () if !exists $arg{dh_single_use} || $arg{dh_single_use};
Net::SSLeay::CTX_set_options ($ctx, $op);
Net::SSLeay::CTX_set_cipher_list ($ctx, $arg{cipher_list})
or croak "'$arg{cipher_list}' was not accepted as a valid cipher list by AnyEvent::TLS"
if exists $arg{cipher_list};
my ($dh_bio, $dh_file);
if (exists $arg{dh_file}) {
$dh_file = $arg{dh_file};
$dh_bio = Net::SSLeay::BIO_new_file ($dh_file, "r")
or croak "$dh_file: failed to open DH parameter file: $!";
} else {
$arg{dh} = "ffdhe3072" unless exists $arg{dh};
if (defined $arg{dh}) {
$dh_file = "dh string";
if ($arg{dh} =~ /^\w+$/) {
$dh_file = "dh params $arg{dh}";
$arg{dh} = "-----BEGIN DH PARAMETERS-----\n"
. (join "\n", unpack "(a74)*", $DH_PARAMS{$arg{dh}}) . "\n"
. "-----END DH PARAMETERS-----";
$arg{dh} =~ s/\|/\n/g;
}
$dh_bio = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
Net::SSLeay::BIO_write ($dh_bio, $arg{dh});
}
}
if ($dh_bio) {
my $dh = Net::SSLeay::PEM_read_bio_DHparams ($dh_bio);
Net::SSLeay::BIO_free ($dh_bio);
$dh or croak "$dh_file: failed to parse DH parameters - not PEM format?";
my $rv = Net::SSLeay::CTX_set_tmp_dh ($ctx, $dh);
Net::SSLeay::DH_free ($dh);
$rv or croak "$dh_file: failed to set DH parameters";
}
if ($arg{verify}) {
$self->{verify_mode} = Net::SSLeay::VERIFY_PEER ();
$self->{verify_mode} |= Net::SSLeay::VERIFY_FAIL_IF_NO_PEER_CERT ()
if $arg{verify_require_client_cert};
$self->{verify_mode} |= Net::SSLeay::VERIFY_CLIENT_ONCE ()
if $arg{verify_client_once};
} else {
$self->{verify_mode} = Net::SSLeay::VERIFY_NONE ();
}
$self->{verify_peername} = $arg{verify_peername}
lib/AnyEvent/TLS.pm view on Meta::CPAN
if length $ENV{PERL_ANYEVENT_TLS_DEBUG};
$self->{debug} = $arg{debug}
if exists $arg{debug};
my $pw = $arg{cert_password};
Net::SSLeay::CTX_set_default_passwd_cb ($ctx, ref $pw ? $pw : sub { $pw });
if ($self->{verify_mode}) {
if (exists $arg{ca_file} or exists $arg{ca_path} or exists $arg{ca_cert}) {
# either specified: use them
if (exists $arg{ca_cert}) {
my ($ca_file, $g1) = _tmpfile delete $arg{ca_cert};
Net::SSLeay::CTX_load_verify_locations ($ctx, $ca_file, undef);
}
if (exists $arg{ca_file} or exists $arg{ca_path}) {
Net::SSLeay::CTX_load_verify_locations ($ctx, $arg{ca_file}, $arg{ca_path});
}
} elsif (length $ENV{PERL_ANYEVENT_CA_FILE} or length $ENV{PERL_ANYEVENT_CA_PATH}) {
Net::SSLeay::CTX_load_verify_locations (
$ctx,
$ENV{PERL_ANYEVENT_CA_FILE},
$ENV{PERL_ANYEVENT_CA_PATH},
);
} else {
# else fall back to defaults
Net::SSLeay::CTX_set_default_verify_paths ($ctx);
}
}
if (exists $arg{cert} or exists $arg{cert_file}) {
my ($g1, $g2);
if (exists $arg{cert}) {
croak "specifying both cert_file and cert is not allowed"
if exists $arg{cert_file};
($arg{cert_file}, $g1) = _tmpfile delete $arg{cert};
}
if (exists $arg{key} or exists $arg{key_file}) {
if (exists $arg{key}) {
croak "specifying both key_file and key is not allowed"
if exists $arg{key_file};
($arg{key_file}, $g2) = _tmpfile delete $arg{key};
}
} else {
$arg{key_file} = $arg{cert_file};
}
Net::SSLeay::CTX_use_PrivateKey_file
($ctx, $arg{key_file}, Net::SSLeay::FILETYPE_PEM ())
or croak "$arg{key_file}: failed to load local private key (key_file or key)";
Net::SSLeay::CTX_use_certificate_chain_file ($ctx, $arg{cert_file})
or croak "$arg{cert_file}: failed to use local certificate chain (cert_file or cert)";
}
if ($arg{check_crl}) {
Net::SSLeay::OPENSSL_VERSION_NUMBER () >= 0x00090702f
or croak "check_crl requires openssl v0.9.7b or higher";
Net::SSLeay::X509_STORE_set_flags (
Net::SSLeay::CTX_get_cert_store ($ctx),
Net::SSLeay::X509_V_FLAG_CRL_CHECK ());
}
Net::SSLeay::CTX_set_read_ahead ($ctx, 1);
$arg{prepare}->($self)
if $arg{prepare};
$self
}
=item $tls = new_from_ssleay AnyEvent::TLS $ctx
This constructor takes an existing L<Net::SSLeay> SSL_CTX object
(which is just an integer) and converts it into an C<AnyEvent::TLS>
object. This only works because AnyEvent::TLS is currently implemented
using Net::SSLeay. As this is such a horrible perl module and OpenSSL has
such an annoying license, this might change in the future, in which case
this method might vanish.
=cut
sub new_from_ssleay {
my ($class, $ctx) = @_;
bless { ctx => $ctx }, $class
}
=item $ctx = $tls->ctx
Returns the actual L<Net::SSLeay::CTX> object (just an integer).
=cut
sub ctx {
$_[0]{ctx}
}
sub verify_hostname($$$);
sub _verify_hostname {
my ($self, $cn, $cert) = @_;
return 1
unless defined $cn;
return 1
unless exists $self->{verify_peername} && "none" ne lc $self->{verify_peername};
return $self->{verify_peername}->($self, $cn, $cert)
if ref $self->{verify_peername} && "ARRAY" ne ref $self->{verify_peername};
verify_hostname $cn, $cert, $self->{verify_peername}
}
sub verify {
my ($self, $session, $ref, $cn, $preverify_ok, $x509_store_ctx) = @_;
my $cert = $x509_store_ctx
? Net::SSLeay::X509_STORE_CTX_get_current_cert ($x509_store_ctx)
: undef;
my $depth = Net::SSLeay::X509_STORE_CTX_get_error_depth ($x509_store_ctx);
$preverify_ok &&= $self->_verify_hostname ($cn, $cert)
unless $depth;
$preverify_ok = $self->{verify_cb}->($self, $ref, $cn, $depth, $preverify_ok, $x509_store_ctx, $cert)
if $self->{verify_cb};
$preverify_ok
}
#=item $ssl = $tls->_get_session ($mode[, $ref])
#
#Creates a new Net::SSLeay::SSL session object, puts it into C<$mode>
#(C<accept> or C<connect>) and optionally associates it with the given
#C<$ref>. If C<$mode> is already a C<Net::SSLeay::SSL> object, then just
#associate data with it.
#
#=cut
#our %REF_MAP;
our $TLS_SNI_WARNED;
sub _get_session($$;$$) {
my ($self, $mode, $ref, $cn) = @_;
my $session;
if ($mode eq "accept") {
$session = Net::SSLeay::new ($self->{ctx});
Net::SSLeay::set_accept_state ($session);
Net::SSLeay::set_options ($session, eval { Net::SSLeay::OP_NO_TICKET () })
unless $self->{session_ticket} || !exists $self->{session_ticket};
} elsif ($mode eq "connect") {
$session = Net::SSLeay::new ($self->{ctx});
if (defined &Net::SSLeay::set_tlsext_host_name) {
Net::SSLeay::set_tlsext_host_name ($session, $cn)
if length $cn;
} else {
AE::log 6 => "TLS SNI not supported by your Net::SSLeay module, connecting without"
unless $TLS_SNI_WARNED++;
}
Net::SSLeay::set_connect_state ($session);
Net::SSLeay::set_options ($session, eval { Net::SSLeay::OP_NO_TICKET () })
unless $self->{session_ticket};
} else {
croak "'$mode': unsupported TLS mode (must be either 'connect' or 'accept')"
}
# # associate data
# Net::SSLeay::set_ex_data ($session, $REF_IDX, $ref+0);
# Scalar::Util::weaken ($REF_MAP{$ref+0} = $ref)
# if ref $ref;
if ($self->{debug}) {
#d# Net::SSLeay::set_info_callback ($session, 50000);
}
if ($self->{verify_mode}) {
Scalar::Util::weaken $self;
Scalar::Util::weaken $ref;
# we have to provide a dummy callbacks as at least Net::SSLeay <= 1.35
# try to call it even if specified as 0 or undef.
Net::SSLeay::set_verify
$session,
$self->{verify_mode},
sub { $self->verify ($session, $ref, $cn, @_) };
}
$session
}
sub _put_session($$) {
my ($self, $session) = @_;
# clear callback, if any
# this leaks memoryin Net::SSLeay up to at least 1.35, but there
# apparently is no other way.
Net::SSLeay::set_verify $session, 0, undef;
# # disassociate data
# delete $REF_MAP{Net::SSLeay::get_ex_data ($session, $REF_IDX)};
Net::SSLeay::free ($session);
}
#sub _ref($) {
# $REF_MAP{Net::SSLeay::get_ex_data ($_[0], $REF_IDX)}
#}
sub DESTROY {
my ($self) = @_;
# better be safe than sorry with net-ssleay
Net::SSLeay::CTX_set_default_passwd_cb ($self->{ctx});
Net::SSLeay::CTX_free ($self->{ctx});
}
=item AnyEvent::TLS::init
AnyEvent::TLS does on-demand initialisation, and normally there is no need to call an initialise
function.
As initialisation might take some time (to read e.g. C</dev/urandom>), this
could be annoying in some highly interactive programs. In that case, you can
call C<AnyEvent::TLS::init> to make sure there will be no costly initialisation
later. It is harmless to call C<AnyEvent::TLS::init> multiple times.
=cut
sub init() {
return if $REF_IDX;
AE::log 5 => "Net::SSLeay versions older than 1.33 might malfunction."
if $Net::SSLeay::VERSION < 1.33;
Net::SSLeay::load_error_strings ();
Net::SSLeay::SSLeay_add_ssl_algorithms ();
Net::SSLeay::randomize ();
$REF_IDX = Net::SSLeay::get_ex_new_index (0, 0, 0, 0, 0)
until $REF_IDX; # Net::SSLeay uses id #0 for its own stuff without allocating it
}
=item $certname = AnyEvent::TLS::certname $x509
Utility function that returns a user-readable string identifying the X509
certificate object.
=cut
sub certname {
$_[0]
? Net::SSLeay::X509_NAME_oneline (Net::SSLeay::X509_get_issuer_name ($_[0]))
. Net::SSLeay::X509_NAME_oneline (Net::SSLeay::X509_get_subject_name ($_[0]))
: undef
}
our %CN_SCHEME = (
# each tuple is [$cn_wildcards, $alt_wildcards, $check_cn]
# where *_wildcards is 0 for none allowed, 1 for allowed at beginning and 2 for allowed everywhere
# and check_cn is 0 for do not check, 1 for check when no alternate dns names and 2 always
# all of this is from IO::Socket::SSL
rfc4513 => [0, 1, 2],
rfc2818 => [0, 2, 1],
rfc3207 => [0, 0, 2], # see IO::Socket::SSL, rfc seems unclear
none => [], # do not check
ldap => "rfc4513", ldaps => "ldap",
http => "rfc2818", https => "http",
smtp => "rfc3207", smtps => "smtp",
xmpp => "rfc3920", rfc3920 => "http",
pop3 => "rfc2595", rfc2595 => "ldap", pop3s => "pop3",
imap => "rfc2595", rfc2595 => "ldap", imaps => "imap",
acap => "rfc2595", rfc2595 => "ldap",
nntp => "rfc4642", rfc4642 => "ldap", nntps => "nntp",
ftp => "rfc4217", rfc4217 => "http", ftps => "ftp" ,
);
sub match_cn($$$) {
my ($name, $cn, $type) = @_;
# remove leading and trailing garbage
for ($name, $cn) {
s/[\x00-\x1f]+$//;
s/^[\x00-\x1f]+//;
}
my $pattern;
### IMPORTANT!
# we accept only a single wildcard and only for a single part of the FQDN
# e.g *.example.org does match www.example.org but not bla.www.example.org
# The RFCs are in this regard unspecific but we don't want to have to
# deal with certificates like *.com, *.co.uk or even *
# see also http://nils.toedtmann.net/pub/subjectAltName.txt
( run in 0.815 second using v1.01-cache-2.11-cpan-acf6aa7dc9e )