2 # Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.
4 # Licensed under the Apache License 2.0 (the "License"). You may not use
5 # this file except in compliance with the License. You can obtain a copy
6 # in the file LICENSE in the source distribution or at
7 # https://www.openssl.org/source/license.html
10 use OpenSSL::Test qw/:DEFAULT cmdstr srctop_file bldtop_dir/;
11 use OpenSSL::Test::Utils;
14 my $test_name = "test_sslsigalgs";
17 plan skip_all => "TLSProxy isn't usable on $^O"
20 plan skip_all => "$test_name needs the dynamic engine feature enabled"
21 if disabled("engine") || disabled("dynamic-engine");
23 plan skip_all => "$test_name needs the sock feature enabled"
26 plan skip_all => "$test_name needs TLS1.2 or TLS1.3 enabled"
27 if disabled("tls1_2") && disabled("tls1_3");
29 my $proxy = TLSProxy::Proxy->new(
31 cmdstr(app(["openssl"]), display => 1),
32 srctop_file("apps", "server.pem"),
33 (!$ENV{HARNESS_ACTIVE} || $ENV{HARNESS_VERBOSE})
38 EMPTY_SIG_ALGS_EXT => 1,
39 NO_KNOWN_SIG_ALGS => 2,
41 PSS_ONLY_SIG_ALGS => 4,
44 SIGALGS_CERT_ALL => 7,
45 SIGALGS_CERT_PKCS => 8,
46 SIGALGS_CERT_INVALID => 9,
47 UNRECOGNIZED_SIGALGS_CERT => 10,
48 UNRECOGNIZED_SIGALG => 11
51 #Note: Throughout this test we override the default ciphersuites where TLSv1.2
52 # is expected to ensure that a ServerKeyExchange message is sent that uses
55 #Test 1: Default sig algs should succeed
56 $proxy->clientflags("-no_tls1_3") if disabled("ec") && disabled("dh");
57 $proxy->start() or plan skip_all => "Unable to start up Proxy for tests";
59 ok(TLSProxy::Message->success, "Default sigalgs");
63 skip "TLSv1.3 disabled", 6
64 if disabled("tls1_3") || (disabled("ec") && disabled("dh"));
66 $proxy->filter(\&sigalgs_filter);
68 #Test 2: Sending no sig algs extension in TLSv1.3 should fail
70 $testtype = NO_SIG_ALGS_EXT;
72 ok(TLSProxy::Message->fail, "No TLSv1.3 sigalgs");
74 #Test 3: Sending an empty sig algs extension in TLSv1.3 should fail
76 $testtype = EMPTY_SIG_ALGS_EXT;
78 ok(TLSProxy::Message->fail, "Empty TLSv1.3 sigalgs");
80 #Test 4: Sending a list with no recognised sig algs in TLSv1.3 should fail
82 $testtype = NO_KNOWN_SIG_ALGS;
84 ok(TLSProxy::Message->fail, "No known TLSv1.3 sigalgs");
86 #Test 5: Sending a sig algs list without pss for an RSA cert in TLSv1.3
89 $testtype = NO_PSS_SIG_ALGS;
91 ok(TLSProxy::Message->fail, "No PSS TLSv1.3 sigalgs");
93 #Test 6: Sending only TLSv1.3 PSS sig algs in TLSv1.3 should succeed
94 #TODO(TLS1.3): Do we need to verify the cert to make sure its a PSS only
97 $testtype = PSS_ONLY_SIG_ALGS;
99 ok(TLSProxy::Message->success, "PSS only sigalgs in TLSv1.3");
101 #Test 7: Modify the CertificateVerify sigalg from rsa_pss_rsae_sha256 to
102 # rsa_pss_pss_sha256. This should fail because the public key OID
103 # in the certificate is rsaEncryption and not rsassaPss
104 $proxy->filter(\&modify_cert_verify_sigalg);
107 ok(TLSProxy::Message->fail,
108 "Mismatch between CertVerify sigalg and public key OID");
112 skip "EC or TLSv1.3 disabled", 1
113 if disabled("tls1_3") || disabled("ec");
114 #Test 8: Sending a valid sig algs list but not including a sig type that
115 # matches the certificate should fail in TLSv1.3.
117 $proxy->clientflags("-sigalgs ECDSA+SHA256");
118 $proxy->filter(undef);
120 ok(TLSProxy::Message->fail, "No matching TLSv1.3 sigalgs");
124 skip "EC, TLSv1.3 or TLSv1.2 disabled", 1
125 if disabled("tls1_2") || disabled("tls1_3") || disabled("ec");
127 #Test 9: Sending a full list of TLSv1.3 sig algs but negotiating TLSv1.2
130 $proxy->serverflags("-no_tls1_3");
131 $proxy->ciphers("ECDHE-RSA-AES128-SHA");
132 $proxy->filter(undef);
134 ok(TLSProxy::Message->success, "TLSv1.3 client TLSv1.2 server");
138 skip "EC or TLSv1.2 disabled", 10 if disabled("tls1_2") || disabled("ec");
140 $proxy->filter(\&sigalgs_filter);
142 #Test 10: Sending no sig algs extension in TLSv1.2 will make it use
143 # SHA1, which is only supported at security level 0.
145 $testtype = NO_SIG_ALGS_EXT;
146 $proxy->clientflags("-no_tls1_3 -cipher DEFAULT:\@SECLEVEL=0");
147 $proxy->ciphers("ECDHE-RSA-AES128-SHA:\@SECLEVEL=0");
149 ok(TLSProxy::Message->success, "No TLSv1.2 sigalgs seclevel 0");
151 #Test 11: Sending no sig algs extension in TLSv1.2 should fail at security
152 # level 1 since it will try to use SHA1. Testing client at level 0,
155 $testtype = NO_SIG_ALGS_EXT;
156 $proxy->clientflags("-tls1_2 -cipher DEFAULT:\@SECLEVEL=0");
157 $proxy->ciphers("DEFAULT:\@SECLEVEL=1");
159 ok(TLSProxy::Message->fail, "No TLSv1.2 sigalgs server seclevel 1");
161 #Test 12: Sending no sig algs extension in TLSv1.2 should fail at security
162 # level 1 since it will try to use SHA1. Testing client at level 1,
165 $testtype = NO_SIG_ALGS_EXT;
166 $proxy->clientflags("-tls1_2 -cipher DEFAULT:\@SECLEVEL=1");
167 $proxy->ciphers("DEFAULT:\@SECLEVEL=0");
169 ok(TLSProxy::Message->fail, "No TLSv1.2 sigalgs client seclevel 2");
171 #Test 13: Sending an empty sig algs extension in TLSv1.2 should fail
173 $testtype = EMPTY_SIG_ALGS_EXT;
174 $proxy->clientflags("-no_tls1_3");
175 $proxy->ciphers("ECDHE-RSA-AES128-SHA");
177 ok(TLSProxy::Message->fail, "Empty TLSv1.2 sigalgs");
179 #Test 14: Sending a list with no recognised sig algs in TLSv1.2 should fail
181 $testtype = NO_KNOWN_SIG_ALGS;
182 $proxy->clientflags("-no_tls1_3");
183 $proxy->ciphers("ECDHE-RSA-AES128-SHA");
185 ok(TLSProxy::Message->fail, "No known TLSv1.3 sigalgs");
187 #Test 15: Sending a sig algs list without pss for an RSA cert in TLSv1.2
190 $testtype = NO_PSS_SIG_ALGS;
191 $proxy->clientflags("-no_tls1_3");
192 $proxy->ciphers("ECDHE-RSA-AES128-SHA");
194 ok(TLSProxy::Message->success, "No PSS TLSv1.2 sigalgs");
196 #Test 16: Sending only TLSv1.3 PSS sig algs in TLSv1.2 should succeed
198 $testtype = PSS_ONLY_SIG_ALGS;
199 $proxy->serverflags("-no_tls1_3");
200 $proxy->ciphers("ECDHE-RSA-AES128-SHA");
202 ok(TLSProxy::Message->success, "PSS only sigalgs in TLSv1.2");
204 #Test 17: Responding with a sig alg we did not send in TLSv1.2 should fail
205 # We send rsa_pkcs1_sha256 and respond with rsa_pss_rsae_sha256
206 # TODO(TLS1.3): Add a similar test to the TLSv1.3 section above
207 # when we have an API capable of configuring the TLSv1.3 sig algs
209 $testtype = PSS_ONLY_SIG_ALGS;
210 $proxy->clientflags("-no_tls1_3 -sigalgs RSA+SHA256");
211 $proxy->ciphers("ECDHE-RSA-AES128-SHA");
213 ok(TLSProxy::Message->fail, "Sigalg we did not send in TLSv1.2");
215 #Test 18: Sending a valid sig algs list but not including a sig type that
216 # matches the certificate should fail in TLSv1.2
218 $proxy->clientflags("-no_tls1_3 -sigalgs ECDSA+SHA256");
219 $proxy->ciphers("ECDHE-RSA-AES128-SHA");
220 $proxy->filter(undef);
222 ok(TLSProxy::Message->fail, "No matching TLSv1.2 sigalgs");
223 $proxy->filter(\&sigalgs_filter);
225 #Test 19: No sig algs extension, ECDSA cert, will use SHA1,
226 # TLSv1.2 should succeed at security level 0
228 $testtype = NO_SIG_ALGS_EXT;
229 $proxy->clientflags("-no_tls1_3 -cipher DEFAULT:\@SECLEVEL=0");
230 $proxy->serverflags("-cert " . srctop_file("test", "certs",
231 "server-ecdsa-cert.pem") .
232 " -key " . srctop_file("test", "certs",
233 "server-ecdsa-key.pem")),
234 $proxy->ciphers("ECDHE-ECDSA-AES128-SHA:\@SECLEVEL=0");
236 ok(TLSProxy::Message->success, "No TLSv1.2 sigalgs, ECDSA");
239 my ($dsa_status, $sha1_status, $sha224_status);
241 skip "TLSv1.3 disabled", 2
242 if disabled("tls1_3")
244 || (disabled("ec") && disabled("dh"));
245 #Test 20: signature_algorithms with 1.3-only ClientHello
246 $testtype = PURE_SIGALGS;
247 $dsa_status = $sha1_status = $sha224_status = 0;
249 $proxy->clientflags("-tls1_3");
250 $proxy->filter(\&modify_sigalgs_filter);
252 ok($dsa_status && $sha1_status && $sha224_status,
253 "DSA and SHA1 sigalgs not sent for 1.3-only ClientHello");
255 #Test 21: signature_algorithms with backwards compatible ClientHello
257 skip "TLSv1.2 disabled", 1 if disabled("tls1_2");
258 $testtype = COMPAT_SIGALGS;
259 $dsa_status = $sha1_status = $sha224_status = 0;
261 $proxy->clientflags("-cipher AES128-SHA\@SECLEVEL=0");
262 $proxy->filter(\&modify_sigalgs_filter);
264 ok($dsa_status && $sha1_status && $sha224_status,
265 "backwards compatible sigalg sent for compat ClientHello");
270 skip "TLSv1.3 disabled", 5
271 if disabled("tls1_3") || (disabled("ec") && disabled("dh"));
272 #Test 22: Insert signature_algorithms_cert that match normal sigalgs
273 $testtype = SIGALGS_CERT_ALL;
275 $proxy->filter(\&modify_sigalgs_cert_filter);
277 ok(TLSProxy::Message->success, "sigalgs_cert in TLSv1.3");
279 #Test 23: Insert signature_algorithms_cert that forces PKCS#1 cert
280 $testtype = SIGALGS_CERT_PKCS;
282 $proxy->filter(\&modify_sigalgs_cert_filter);
284 ok(TLSProxy::Message->success, "sigalgs_cert in TLSv1.3 with PKCS#1 cert");
286 #Test 24: Insert signature_algorithms_cert that fails
287 $testtype = SIGALGS_CERT_INVALID;
289 $proxy->filter(\&modify_sigalgs_cert_filter);
291 ok(TLSProxy::Message->fail, "No matching certificate for sigalgs_cert");
293 #Test 25: Send an unrecognized signature_algorithms_cert
294 # We should be able to skip over the unrecognized value and use a
295 # valid one that appears later in the list.
297 $proxy->filter(\&inject_unrecognized_sigalg);
298 $proxy->clientflags("-tls1_3");
299 # Use -xcert to get SSL_check_chain() to run in the cert_cb. This is
300 # needed to trigger (e.g.) CVE-2020-1967
301 $proxy->serverflags("" .
302 " -xcert " . srctop_file("test", "certs", "servercert.pem") .
303 " -xkey " . srctop_file("test", "certs", "serverkey.pem") .
304 " -xchain " . srctop_file("test", "certs", "rootcert.pem"));
305 $testtype = UNRECOGNIZED_SIGALGS_CERT;
307 ok(TLSProxy::Message->success(), "Unrecognized sigalg_cert in ClientHello");
309 #Test 26: Send an unrecognized signature_algorithms
310 # We should be able to skip over the unrecognized value and use a
311 # valid one that appears later in the list.
313 $proxy->filter(\&inject_unrecognized_sigalg);
314 $proxy->clientflags("-tls1_3");
315 $proxy->serverflags("" .
316 " -xcert " . srctop_file("test", "certs", "servercert.pem") .
317 " -xkey " . srctop_file("test", "certs", "serverkey.pem") .
318 " -xchain " . srctop_file("test", "certs", "rootcert.pem"));
319 $testtype = UNRECOGNIZED_SIGALG;
321 ok(TLSProxy::Message->success(), "Unrecognized sigalg in ClientHello");
330 # We're only interested in the initial ClientHello
331 if ($proxy->flight != 0) {
335 foreach my $message (@{$proxy->message_list}) {
336 if ($message->mt == TLSProxy::Message::MT_CLIENT_HELLO) {
337 if ($testtype == NO_SIG_ALGS_EXT) {
338 $message->delete_extension(TLSProxy::Message::EXT_SIG_ALGS);
341 if ($testtype == EMPTY_SIG_ALGS_EXT) {
342 $sigalg = pack "C2", 0x00, 0x00;
343 } elsif ($testtype == NO_KNOWN_SIG_ALGS) {
344 $sigalg = pack "C4", 0x00, 0x02, 0xff, 0xff;
345 } elsif ($testtype == NO_PSS_SIG_ALGS) {
346 #No PSS sig algs - just send rsa_pkcs1_sha256
347 $sigalg = pack "C4", 0x00, 0x02, 0x04, 0x01;
349 #PSS sig algs only - just send rsa_pss_rsae_sha256
350 $sigalg = pack "C4", 0x00, 0x02, 0x08, 0x04;
352 $message->set_extension(TLSProxy::Message::EXT_SIG_ALGS, $sigalg);
360 sub modify_sigalgs_filter
364 # We're only interested in the initial ClientHello
365 return if ($proxy->flight != 0);
367 foreach my $message (@{$proxy->message_list}) {
371 if ($message->mt == TLSProxy::Message::MT_CLIENT_HELLO) {
372 if ($testtype == PURE_SIGALGS) {
374 $ext = $message->extension_data->{TLSProxy::Message::EXT_SIG_ALGS};
375 @algs = unpack('S>*', $ext);
376 # unpack will unpack the length as well
379 if ($_ == TLSProxy::Message::SIG_ALG_DSA_SHA256
380 || $_ == TLSProxy::Message::SIG_ALG_DSA_SHA384
381 || $_ == TLSProxy::Message::SIG_ALG_DSA_SHA512
382 || $_ == TLSProxy::Message::OSSL_SIG_ALG_DSA_SHA224
383 || $_ == TLSProxy::Message::SIG_ALG_RSA_PKCS1_SHA1
384 || $_ == TLSProxy::Message::SIG_ALG_DSA_SHA1
385 || $_ == TLSProxy::Message::SIG_ALG_ECDSA_SHA1) {
389 $sha1_status = $dsa_status = $sha224_status = 1 if ($ok);
390 } elsif ($testtype == COMPAT_SIGALGS) {
391 $ext = $message->extension_data->{TLSProxy::Message::EXT_SIG_ALGS};
392 @algs = unpack('S>*', $ext);
393 # unpack will unpack the length as well
396 if ($_ == TLSProxy::Message::SIG_ALG_DSA_SHA256
397 || $_ == TLSProxy::Message::SIG_ALG_DSA_SHA384
398 || $_ == TLSProxy::Message::SIG_ALG_DSA_SHA512) {
401 if ($_ == TLSProxy::Message::SIG_ALG_RSA_PKCS1_SHA1
402 || $_ == TLSProxy::Message::SIG_ALG_DSA_SHA1
403 || $_ == TLSProxy::Message::SIG_ALG_ECDSA_SHA1) {
406 if ($_ == TLSProxy::Message::OSSL_SIG_ALG_RSA_PKCS1_SHA224
407 || $_ == TLSProxy::Message::OSSL_SIG_ALG_DSA_SHA224
408 || $_ == TLSProxy::Message::OSSL_SIG_ALG_ECDSA_SHA224) {
417 sub modify_sigalgs_cert_filter
421 # We're only interested in the initial ClientHello
422 if ($proxy->flight != 0) {
426 foreach my $message (@{$proxy->message_list}) {
427 if ($message->mt == TLSProxy::Message::MT_CLIENT_HELLO) {
429 # two byte length at front of sigs, then two-byte sigschemes
430 if ($testtype == SIGALGS_CERT_ALL) {
431 $sigs = pack "C26", 0x00, 0x18,
432 # rsa_pkcs_sha{256,512} rsa_pss_rsae_sha{256,512}
433 0x04, 0x01, 0x06, 0x01, 0x08, 0x04, 0x08, 0x06,
434 # ed25518 ed448 rsa_pss_pss_sha{256,512}
435 0x08, 0x07, 0x08, 0x08, 0x08, 0x09, 0x08, 0x0b,
436 # ecdsa_secp{256,512} rsa+sha1 ecdsa+sha1
437 0x04, 0x03, 0x06, 0x03, 0x02, 0x01, 0x02, 0x03;
438 } elsif ($testtype == SIGALGS_CERT_PKCS) {
439 $sigs = pack "C10", 0x00, 0x08,
440 # rsa_pkcs_sha{256,384,512,1}
441 0x04, 0x01, 0x05, 0x01, 0x06, 0x01, 0x02, 0x01;
442 } elsif ($testtype == SIGALGS_CERT_INVALID) {
443 $sigs = pack "C4", 0x00, 0x02,
444 # unregistered codepoint
447 $message->set_extension(TLSProxy::Message::EXT_SIG_ALGS_CERT, $sigs);
453 sub modify_cert_verify_sigalg
457 # We're only interested in the CertificateVerify
458 if ($proxy->flight != 1) {
462 foreach my $message (@{$proxy->message_list}) {
463 if ($message->mt == TLSProxy::Message::MT_CERTIFICATE_VERIFY) {
464 $message->sigalg(TLSProxy::Message::SIG_ALG_RSA_PSS_PSS_SHA256);
470 sub inject_unrecognized_sigalg
475 # We're only interested in the initial ClientHello
476 if ($proxy->flight != 0) {
479 if ($testtype == UNRECOGNIZED_SIGALGS_CERT) {
480 $type = TLSProxy::Message::EXT_SIG_ALGS_CERT;
481 } elsif ($testtype == UNRECOGNIZED_SIGALG) {
482 $type = TLSProxy::Message::EXT_SIG_ALGS;
488 0x00, 0x06, #Extension length
489 0xfe, 0x18, #private use
490 0x04, 0x01, #rsa_pkcs1_sha256
491 0x08, 0x04; #rsa_pss_rsae_sha256;
492 my $message = ${$proxy->message_list}[0];
493 $message->set_extension($type, $ext);