389 lines
14 KiB
Perl
389 lines
14 KiB
Perl
#! /usr/bin/env perl
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# Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
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#
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# Licensed under the OpenSSL license (the "License"). You may not use
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# this file except in compliance with the License. You can obtain a copy
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# in the file LICENSE in the source distribution or at
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# https://www.openssl.org/source/license.html
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use strict;
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use OpenSSL::Test qw/:DEFAULT cmdstr srctop_file bldtop_dir/;
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use OpenSSL::Test::Utils;
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use TLSProxy::Proxy;
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use File::Temp qw(tempfile);
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use constant {
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LOOK_ONLY => 0,
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EMPTY_EXTENSION => 1,
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MISSING_EXTENSION => 2,
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NO_ACCEPTABLE_KEY_SHARES => 3,
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NON_PREFERRED_KEY_SHARE => 4,
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ACCEPTABLE_AT_END => 5,
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NOT_IN_SUPPORTED_GROUPS => 6,
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GROUP_ID_TOO_SHORT => 7,
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KEX_LEN_MISMATCH => 8,
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ZERO_LEN_KEX_DATA => 9,
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TRAILING_DATA => 10,
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SELECT_X25519 => 11,
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NO_KEY_SHARES_IN_HRR => 12
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};
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use constant {
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CLIENT_TO_SERVER => 1,
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SERVER_TO_CLIENT => 2
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};
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use constant {
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X25519 => 0x1d,
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P_256 => 0x17
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};
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my $testtype;
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my $direction;
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my $selectedgroupid;
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my $test_name = "test_key_share";
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setup($test_name);
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plan skip_all => "TLSProxy isn't usable on $^O"
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if $^O =~ /^(VMS)$/;
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plan skip_all => "$test_name needs the dynamic engine feature enabled"
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if disabled("engine") || disabled("dynamic-engine");
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plan skip_all => "$test_name needs the sock feature enabled"
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if disabled("sock");
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plan skip_all => "$test_name needs TLS1.3 enabled"
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if disabled("tls1_3");
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$ENV{OPENSSL_ia32cap} = '~0x200000200000000';
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my $proxy = TLSProxy::Proxy->new(
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undef,
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cmdstr(app(["openssl"]), display => 1),
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srctop_file("apps", "server.pem"),
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(!$ENV{HARNESS_ACTIVE} || $ENV{HARNESS_VERBOSE})
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);
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#We assume that test_ssl_new and friends will test the happy path for this,
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#so we concentrate on the less common scenarios
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#Test 1: An empty key_shares extension should succeed after a HelloRetryRequest
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$testtype = EMPTY_EXTENSION;
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$direction = CLIENT_TO_SERVER;
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$proxy->filter(\&modify_key_shares_filter);
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$proxy->serverflags("-curves P-256");
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$proxy->start() or plan skip_all => "Unable to start up Proxy for tests";
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plan tests => 22;
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ok(TLSProxy::Message->success(), "Success after HRR");
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#Test 2: The server sending an HRR requesting a group the client already sent
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# should fail
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$proxy->clear();
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$proxy->start();
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ok(TLSProxy::Message->fail(), "Server asks for group already provided");
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#Test 3: A missing key_shares extension should not succeed
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$proxy->clear();
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$testtype = MISSING_EXTENSION;
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$proxy->start();
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ok(TLSProxy::Message->fail(), "Missing key_shares extension");
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#Test 4: No initial acceptable key_shares should succeed after a
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# HelloRetryRequest
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$proxy->clear();
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$proxy->filter(undef);
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$proxy->serverflags("-curves P-256");
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$proxy->start();
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ok(TLSProxy::Message->success(), "No initial acceptable key_shares");
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#Test 5: No acceptable key_shares and no shared groups should fail
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$proxy->clear();
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$proxy->filter(undef);
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$proxy->serverflags("-curves P-256");
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$proxy->clientflags("-curves P-384");
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$proxy->start();
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ok(TLSProxy::Message->fail(), "No acceptable key_shares");
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#Test 6: A non preferred but acceptable key_share should succeed
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$proxy->clear();
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$proxy->clientflags("-curves P-256");
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$proxy->start();
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ok(TLSProxy::Message->success(), "Non preferred key_share");
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$proxy->filter(\&modify_key_shares_filter);
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#Test 7: An acceptable key_share after a list of non-acceptable ones should
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#succeed
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$proxy->clear();
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$testtype = ACCEPTABLE_AT_END;
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$proxy->start();
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ok(TLSProxy::Message->success(), "Acceptable key_share at end of list");
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#Test 8: An acceptable key_share but for a group not in supported_groups should
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#fail
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$proxy->clear();
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$testtype = NOT_IN_SUPPORTED_GROUPS;
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$proxy->start();
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ok(TLSProxy::Message->fail(), "Acceptable key_share not in supported_groups");
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#Test 9: Too short group_id should fail
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$proxy->clear();
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$testtype = GROUP_ID_TOO_SHORT;
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$proxy->start();
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ok(TLSProxy::Message->fail(), "Group id too short");
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#Test 10: key_exchange length mismatch should fail
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$proxy->clear();
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$testtype = KEX_LEN_MISMATCH;
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$proxy->start();
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ok(TLSProxy::Message->fail(), "key_exchange length mismatch");
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#Test 11: Zero length key_exchange should fail
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$proxy->clear();
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$testtype = ZERO_LEN_KEX_DATA;
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$proxy->start();
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ok(TLSProxy::Message->fail(), "zero length key_exchange data");
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#Test 12: Trailing data on key_share list should fail
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$proxy->clear();
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$testtype = TRAILING_DATA;
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$proxy->start();
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ok(TLSProxy::Message->fail(), "key_share list trailing data");
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#Test 13: Multiple acceptable key_shares - we choose the first one
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$proxy->clear();
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$direction = SERVER_TO_CLIENT;
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$testtype = LOOK_ONLY;
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$proxy->clientflags("-curves P-256:X25519");
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$proxy->start();
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ok(TLSProxy::Message->success() && ($selectedgroupid == P_256),
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"Multiple acceptable key_shares");
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#Test 14: Multiple acceptable key_shares - we choose the first one (part 2)
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$proxy->clear();
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$proxy->clientflags("-curves X25519:P-256");
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$proxy->start();
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ok(TLSProxy::Message->success() && ($selectedgroupid == X25519),
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"Multiple acceptable key_shares (part 2)");
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#Test 15: Server sends key_share that wasn't offered should fail
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$proxy->clear();
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$testtype = SELECT_X25519;
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$proxy->clientflags("-curves P-256");
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$proxy->start();
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ok(TLSProxy::Message->fail(), "Non offered key_share");
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#Test 16: Too short group_id in ServerHello should fail
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$proxy->clear();
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$testtype = GROUP_ID_TOO_SHORT;
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$proxy->start();
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ok(TLSProxy::Message->fail(), "Group id too short in ServerHello");
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#Test 17: key_exchange length mismatch in ServerHello should fail
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$proxy->clear();
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$testtype = KEX_LEN_MISMATCH;
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$proxy->start();
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ok(TLSProxy::Message->fail(), "key_exchange length mismatch in ServerHello");
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#Test 18: Zero length key_exchange in ServerHello should fail
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$proxy->clear();
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$testtype = ZERO_LEN_KEX_DATA;
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$proxy->start();
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ok(TLSProxy::Message->fail(), "zero length key_exchange data in ServerHello");
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#Test 19: Trailing data on key_share in ServerHello should fail
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$proxy->clear();
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$testtype = TRAILING_DATA;
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$proxy->start();
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ok(TLSProxy::Message->fail(), "key_share trailing data in ServerHello");
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SKIP: {
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skip "No TLSv1.2 support in this OpenSSL build", 2 if disabled("tls1_2");
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#Test 20: key_share should not be sent if the client is not capable of
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# negotiating TLSv1.3
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$proxy->clear();
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$proxy->filter(undef);
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$proxy->clientflags("-no_tls1_3");
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$proxy->start();
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my $clienthello = $proxy->message_list->[0];
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ok(TLSProxy::Message->success()
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&& !defined $clienthello->extension_data->{TLSProxy::Message::EXT_KEY_SHARE},
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"No key_share for TLS<=1.2 client");
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$proxy->filter(\&modify_key_shares_filter);
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#Test 21: A server not capable of negotiating TLSv1.3 should not attempt to
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# process a key_share
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$proxy->clear();
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$direction = CLIENT_TO_SERVER;
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$testtype = NO_ACCEPTABLE_KEY_SHARES;
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$proxy->serverflags("-no_tls1_3");
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$proxy->start();
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ok(TLSProxy::Message->success(), "Ignore key_share for TLS<=1.2 server");
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}
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#Test 22: The server sending an HRR but not requesting a new key_share should
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# fail
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$proxy->clear();
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$direction = SERVER_TO_CLIENT;
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$testtype = NO_KEY_SHARES_IN_HRR;
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$proxy->serverflags("-curves X25519");
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$proxy->start();
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ok(TLSProxy::Message->fail(), "Server sends HRR with no key_shares");
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sub modify_key_shares_filter
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{
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my $proxy = shift;
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# We're only interested in the initial ClientHello
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if (($direction == CLIENT_TO_SERVER && $proxy->flight != 0
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&& ($proxy->flight != 1 || $testtype != NO_KEY_SHARES_IN_HRR))
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|| ($direction == SERVER_TO_CLIENT && $proxy->flight != 1)) {
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return;
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}
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foreach my $message (@{$proxy->message_list}) {
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if ($message->mt == TLSProxy::Message::MT_CLIENT_HELLO
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&& $direction == CLIENT_TO_SERVER) {
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my $ext;
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my $suppgroups;
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#Setup supported groups to include some unrecognised groups
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$suppgroups = pack "C8",
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0x00, 0x06, #List Length
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0xff, 0xfe, #Non existing group 1
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0xff, 0xff, #Non existing group 2
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0x00, 0x1d; #x25519
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if ($testtype == EMPTY_EXTENSION) {
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$ext = pack "C2",
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0x00, 0x00;
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} elsif ($testtype == NO_ACCEPTABLE_KEY_SHARES) {
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$ext = pack "C12",
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0x00, 0x0a, #List Length
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0xff, 0xfe, #Non existing group 1
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0x00, 0x01, 0xff, #key_exchange data
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0xff, 0xff, #Non existing group 2
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0x00, 0x01, 0xff; #key_exchange data
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} elsif ($testtype == ACCEPTABLE_AT_END) {
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$ext = pack "C11H64",
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0x00, 0x29, #List Length
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0xff, 0xfe, #Non existing group 1
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0x00, 0x01, 0xff, #key_exchange data
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0x00, 0x1d, #x25519
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0x00, 0x20, #key_exchange data length
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"155155B95269ED5C87EAA99C2EF5A593".
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"EDF83495E80380089F831B94D14B1421"; #key_exchange data
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} elsif ($testtype == NOT_IN_SUPPORTED_GROUPS) {
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$suppgroups = pack "C4",
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0x00, 0x02, #List Length
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0x00, 0xfe; #Non existing group 1
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} elsif ($testtype == GROUP_ID_TOO_SHORT) {
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$ext = pack "C6H64C1",
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0x00, 0x25, #List Length
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0x00, 0x1d, #x25519
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0x00, 0x20, #key_exchange data length
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"155155B95269ED5C87EAA99C2EF5A593".
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"EDF83495E80380089F831B94D14B1421"; #key_exchange data
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0x00; #Group id too short
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} elsif ($testtype == KEX_LEN_MISMATCH) {
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$ext = pack "C8",
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0x00, 0x06, #List Length
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0x00, 0x1d, #x25519
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0x00, 0x20, #key_exchange data length
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0x15, 0x51; #Only two bytes of data, but length should be 32
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} elsif ($testtype == ZERO_LEN_KEX_DATA) {
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$ext = pack "C10H64",
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0x00, 0x28, #List Length
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0xff, 0xfe, #Non existing group 1
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0x00, 0x00, #zero length key_exchange data is invalid
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0x00, 0x1d, #x25519
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0x00, 0x20, #key_exchange data length
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"155155B95269ED5C87EAA99C2EF5A593".
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"EDF83495E80380089F831B94D14B1421"; #key_exchange data
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} elsif ($testtype == TRAILING_DATA) {
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$ext = pack "C6H64C1",
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0x00, 0x24, #List Length
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0x00, 0x1d, #x25519
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0x00, 0x20, #key_exchange data length
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"155155B95269ED5C87EAA99C2EF5A593".
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"EDF83495E80380089F831B94D14B1421", #key_exchange data
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0x00; #Trailing garbage
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} elsif ($testtype == NO_KEY_SHARES_IN_HRR) {
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#We trick the server into thinking we sent a P-256 key_share -
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#but the client actually sent X25519
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$ext = pack "C7",
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0x00, 0x05, #List Length
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0x00, 0x17, #P-256
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0x00, 0x01, #key_exchange data length
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0xff; #Dummy key_share data
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}
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if ($testtype != EMPTY_EXTENSION
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&& $testtype != NO_KEY_SHARES_IN_HRR) {
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$message->set_extension(
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TLSProxy::Message::EXT_SUPPORTED_GROUPS, $suppgroups);
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}
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if ($testtype == MISSING_EXTENSION) {
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$message->delete_extension(
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TLSProxy::Message::EXT_KEY_SHARE);
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} elsif ($testtype != NOT_IN_SUPPORTED_GROUPS) {
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$message->set_extension(
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TLSProxy::Message::EXT_KEY_SHARE, $ext);
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}
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$message->repack();
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} elsif ($message->mt == TLSProxy::Message::MT_SERVER_HELLO
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&& $direction == SERVER_TO_CLIENT) {
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my $ext;
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my $key_share =
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$message->extension_data->{TLSProxy::Message::EXT_KEY_SHARE};
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$selectedgroupid = unpack("n", $key_share);
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if ($testtype == LOOK_ONLY) {
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return;
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}
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if ($testtype == NO_KEY_SHARES_IN_HRR) {
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$message->delete_extension(TLSProxy::Message::EXT_KEY_SHARE);
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$message->set_extension(TLSProxy::Message::EXT_UNKNOWN, "");
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$message->repack();
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return;
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}
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if ($testtype == SELECT_X25519) {
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$ext = pack "C4H64",
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0x00, 0x1d, #x25519
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0x00, 0x20, #key_exchange data length
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"155155B95269ED5C87EAA99C2EF5A593".
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"EDF83495E80380089F831B94D14B1421"; #key_exchange data
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} elsif ($testtype == GROUP_ID_TOO_SHORT) {
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$ext = pack "C1",
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0x00;
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} elsif ($testtype == KEX_LEN_MISMATCH) {
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$ext = pack "C6",
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0x00, 0x1d, #x25519
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0x00, 0x20, #key_exchange data length
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0x15, 0x51; #Only two bytes of data, but length should be 32
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} elsif ($testtype == ZERO_LEN_KEX_DATA) {
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$ext = pack "C4",
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0x00, 0x1d, #x25519
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0x00, 0x00, #zero length key_exchange data is invalid
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} elsif ($testtype == TRAILING_DATA) {
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$ext = pack "C4H64C1",
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0x00, 0x1d, #x25519
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0x00, 0x20, #key_exchange data length
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"155155B95269ED5C87EAA99C2EF5A593".
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"EDF83495E80380089F831B94D14B1421", #key_exchange data
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0x00; #Trailing garbage
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}
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$message->set_extension(TLSProxy::Message::EXT_KEY_SHARE, $ext);
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$message->repack();
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}
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}
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}
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