/src/botan/src/lib/tls/tls_policy.cpp
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * Policies for TLS |
3 | | * (C) 2004-2010,2012,2015,2016 Jack Lloyd |
4 | | * 2016 Christian Mainka |
5 | | * 2017 Harry Reimann, Rohde & Schwarz Cybersecurity |
6 | | * |
7 | | * Botan is released under the Simplified BSD License (see license.txt) |
8 | | */ |
9 | | |
10 | | #include <botan/tls_policy.h> |
11 | | #include <botan/tls_ciphersuite.h> |
12 | | #include <botan/tls_algos.h> |
13 | | #include <botan/tls_exceptn.h> |
14 | | #include <botan/internal/stl_util.h> |
15 | | #include <botan/pk_keys.h> |
16 | | #include <sstream> |
17 | | |
18 | | namespace Botan { |
19 | | |
20 | | namespace TLS { |
21 | | |
22 | | std::vector<Signature_Scheme> Policy::allowed_signature_schemes() const |
23 | 2.04k | { |
24 | 2.04k | std::vector<Signature_Scheme> schemes; |
25 | | |
26 | 2.04k | for(Signature_Scheme scheme : all_signature_schemes()) |
27 | 18.3k | { |
28 | 18.3k | if(signature_scheme_is_known(scheme) == false) |
29 | 0 | continue; |
30 | 18.3k | const bool sig_allowed = allowed_signature_method(signature_algorithm_of_scheme(scheme)); |
31 | 18.3k | const bool hash_allowed = allowed_signature_hash(hash_function_of_scheme(scheme)); |
32 | | |
33 | 18.3k | if(sig_allowed && hash_allowed) |
34 | 18.3k | { |
35 | 18.3k | schemes.push_back(scheme); |
36 | 18.3k | } |
37 | 18.3k | } |
38 | | |
39 | 2.04k | return schemes; |
40 | 2.04k | } |
41 | | |
42 | | std::vector<Signature_Scheme> Policy::acceptable_signature_schemes() const |
43 | 1.92k | { |
44 | 1.92k | return this->allowed_signature_schemes(); |
45 | 1.92k | } |
46 | | |
47 | | std::vector<std::string> Policy::allowed_ciphers() const |
48 | 0 | { |
49 | 0 | return { |
50 | | //"AES-256/OCB(12)", |
51 | 0 | "ChaCha20Poly1305", |
52 | 0 | "AES-256/GCM", |
53 | 0 | "AES-128/GCM", |
54 | | //"AES-256/CCM", |
55 | | //"AES-128/CCM", |
56 | | //"AES-256/CCM(8)", |
57 | | //"AES-128/CCM(8)", |
58 | | //"Camellia-256/GCM", |
59 | | //"Camellia-128/GCM", |
60 | | //"ARIA-256/GCM", |
61 | | //"ARIA-128/GCM", |
62 | | //"AES-256", |
63 | | //"AES-128", |
64 | | //"3DES", |
65 | 0 | }; |
66 | 0 | } |
67 | | |
68 | | std::vector<std::string> Policy::allowed_signature_hashes() const |
69 | 18.6k | { |
70 | 18.6k | return { |
71 | 18.6k | "SHA-512", |
72 | 18.6k | "SHA-384", |
73 | 18.6k | "SHA-256", |
74 | 18.6k | }; |
75 | 18.6k | } |
76 | | |
77 | | std::vector<std::string> Policy::allowed_macs() const |
78 | 0 | { |
79 | | /* |
80 | | SHA-256 is preferred because the Lucky13 countermeasure works |
81 | | somewhat better for SHA-256 vs SHA-384: |
82 | | https://github.com/randombit/botan/pull/675 |
83 | | */ |
84 | 0 | return { |
85 | 0 | "AEAD", |
86 | 0 | "SHA-256", |
87 | 0 | "SHA-384", |
88 | 0 | "SHA-1", |
89 | 0 | }; |
90 | 0 | } |
91 | | |
92 | | std::vector<std::string> Policy::allowed_key_exchange_methods() const |
93 | 0 | { |
94 | 0 | return { |
95 | | //"ECDHE_PSK", |
96 | | //"PSK", |
97 | 0 | "CECPQ1", |
98 | 0 | "ECDH", |
99 | 0 | "DH", |
100 | | //"RSA", |
101 | 0 | }; |
102 | 0 | } |
103 | | |
104 | | std::vector<std::string> Policy::allowed_signature_methods() const |
105 | 18.3k | { |
106 | 18.3k | return { |
107 | 18.3k | "ECDSA", |
108 | 18.3k | "RSA", |
109 | | //"DSA", |
110 | | //"IMPLICIT", |
111 | 18.3k | }; |
112 | 18.3k | } |
113 | | |
114 | | bool Policy::allowed_signature_method(const std::string& sig_method) const |
115 | 18.3k | { |
116 | 18.3k | return value_exists(allowed_signature_methods(), sig_method); |
117 | 18.3k | } |
118 | | |
119 | | bool Policy::allowed_signature_hash(const std::string& sig_hash) const |
120 | 18.6k | { |
121 | 18.6k | return value_exists(allowed_signature_hashes(), sig_hash); |
122 | 18.6k | } |
123 | | |
124 | | bool Policy::use_ecc_point_compression() const |
125 | 12.3k | { |
126 | 12.3k | return false; |
127 | 12.3k | } |
128 | | |
129 | | Group_Params Policy::choose_key_exchange_group(const std::vector<Group_Params>& peer_groups) const |
130 | 63.2k | { |
131 | 63.2k | if(peer_groups.empty()) |
132 | 583 | return Group_Params::NONE; |
133 | | |
134 | 62.6k | const std::vector<Group_Params> our_groups = key_exchange_groups(); |
135 | | |
136 | 62.6k | for(auto g : our_groups) |
137 | 340k | { |
138 | 340k | if(value_exists(peer_groups, g)) |
139 | 62.6k | return g; |
140 | 340k | } |
141 | | |
142 | 72 | return Group_Params::NONE; |
143 | 62.6k | } |
144 | | |
145 | | Group_Params Policy::default_dh_group() const |
146 | 0 | { |
147 | | /* |
148 | | * Return the first listed or just default to 2048 |
149 | | */ |
150 | 0 | for(auto g : key_exchange_groups()) |
151 | 0 | { |
152 | 0 | if(group_param_is_dh(g)) |
153 | 0 | return g; |
154 | 0 | } |
155 | |
|
156 | 0 | return Group_Params::FFDHE_2048; |
157 | 0 | } |
158 | | |
159 | | std::vector<Group_Params> Policy::key_exchange_groups() const |
160 | 64.6k | { |
161 | | // Default list is ordered by performance |
162 | 64.6k | return { |
163 | | |
164 | 64.6k | #if defined(BOTAN_HAS_CURVE_25519) |
165 | 64.6k | Group_Params::X25519, |
166 | 64.6k | #endif |
167 | | |
168 | 64.6k | Group_Params::SECP256R1, |
169 | 64.6k | Group_Params::BRAINPOOL256R1, |
170 | 64.6k | Group_Params::SECP384R1, |
171 | 64.6k | Group_Params::BRAINPOOL384R1, |
172 | 64.6k | Group_Params::SECP521R1, |
173 | 64.6k | Group_Params::BRAINPOOL512R1, |
174 | | |
175 | 64.6k | Group_Params::FFDHE_2048, |
176 | 64.6k | Group_Params::FFDHE_3072, |
177 | 64.6k | Group_Params::FFDHE_4096, |
178 | 64.6k | Group_Params::FFDHE_6144, |
179 | 64.6k | Group_Params::FFDHE_8192, |
180 | 64.6k | }; |
181 | 64.6k | } |
182 | | |
183 | | size_t Policy::minimum_dh_group_size() const |
184 | 0 | { |
185 | 0 | return 2048; |
186 | 0 | } |
187 | | |
188 | | size_t Policy::minimum_ecdsa_group_size() const |
189 | 0 | { |
190 | | // Here we are at the mercy of whatever the CA signed, but most certs should be 256 bit by now |
191 | 0 | return 256; |
192 | 0 | } |
193 | | |
194 | | size_t Policy::minimum_ecdh_group_size() const |
195 | 0 | { |
196 | | // x25519 is smallest curve currently supported for TLS key exchange |
197 | 0 | return 255; |
198 | 0 | } |
199 | | |
200 | | size_t Policy::minimum_signature_strength() const |
201 | 0 | { |
202 | 0 | return 110; |
203 | 0 | } |
204 | | |
205 | | bool Policy::require_cert_revocation_info() const |
206 | 0 | { |
207 | 0 | return true; |
208 | 0 | } |
209 | | |
210 | | size_t Policy::minimum_rsa_bits() const |
211 | 0 | { |
212 | | /* Default assumption is all end-entity certificates should |
213 | | be at least 2048 bits these days. |
214 | | |
215 | | If you are connecting to arbitrary servers on the Internet |
216 | | (ie as a web browser or SMTP client) you'll probably have to reduce this |
217 | | to 1024 bits, or perhaps even lower. |
218 | | */ |
219 | 0 | return 2048; |
220 | 0 | } |
221 | | |
222 | | void Policy::check_peer_key_acceptable(const Public_Key& public_key) const |
223 | 0 | { |
224 | 0 | const std::string algo_name = public_key.algo_name(); |
225 | |
|
226 | 0 | const size_t keylength = public_key.key_length(); |
227 | 0 | size_t expected_keylength = 0; |
228 | |
|
229 | 0 | if(algo_name == "RSA") |
230 | 0 | { |
231 | 0 | expected_keylength = minimum_rsa_bits(); |
232 | 0 | } |
233 | 0 | else if(algo_name == "DH") |
234 | 0 | { |
235 | 0 | expected_keylength = minimum_dh_group_size(); |
236 | 0 | } |
237 | 0 | else if(algo_name == "ECDH" || algo_name == "Curve25519") |
238 | 0 | { |
239 | 0 | expected_keylength = minimum_ecdh_group_size(); |
240 | 0 | } |
241 | 0 | else if(algo_name == "ECDSA") |
242 | 0 | { |
243 | 0 | expected_keylength = minimum_ecdsa_group_size(); |
244 | 0 | } |
245 | | // else some other algo, so leave expected_keylength as zero and the check is a no-op |
246 | |
|
247 | 0 | if(keylength < expected_keylength) |
248 | 0 | throw TLS_Exception(Alert::INSUFFICIENT_SECURITY, |
249 | 0 | "Peer sent " + |
250 | 0 | std::to_string(keylength) + " bit " + algo_name + " key" |
251 | 0 | ", policy requires at least " + |
252 | 0 | std::to_string(expected_keylength)); |
253 | 0 | } |
254 | | |
255 | | uint32_t Policy::session_ticket_lifetime() const |
256 | 22.1k | { |
257 | 22.1k | return 86400; // ~1 day |
258 | 22.1k | } |
259 | | |
260 | | bool Policy::acceptable_protocol_version(Protocol_Version version) const |
261 | 37.9k | { |
262 | 37.9k | if(version == Protocol_Version::TLS_V12 && allow_tls12()) |
263 | 24.0k | return true; |
264 | | |
265 | 13.9k | if(version == Protocol_Version::DTLS_V12 && allow_dtls12()) |
266 | 13.9k | return true; |
267 | | |
268 | 0 | return false; |
269 | 0 | } |
270 | | |
271 | | Protocol_Version Policy::latest_supported_version(bool datagram) const |
272 | 29.4k | { |
273 | 29.4k | if(datagram) |
274 | 7.49k | { |
275 | 7.49k | if(acceptable_protocol_version(Protocol_Version::DTLS_V12)) |
276 | 7.49k | return Protocol_Version::DTLS_V12; |
277 | 0 | throw Invalid_State("Policy forbids all available DTLS version"); |
278 | 0 | } |
279 | 21.9k | else |
280 | 21.9k | { |
281 | 21.9k | if(acceptable_protocol_version(Protocol_Version::TLS_V12)) |
282 | 21.9k | return Protocol_Version::TLS_V12; |
283 | 0 | throw Invalid_State("Policy forbids all available TLS version"); |
284 | 0 | } |
285 | 29.4k | } |
286 | | |
287 | | bool Policy::acceptable_ciphersuite(const Ciphersuite& ciphersuite) const |
288 | 0 | { |
289 | 0 | return value_exists(allowed_ciphers(), ciphersuite.cipher_algo()) && |
290 | 0 | value_exists(allowed_macs(), ciphersuite.mac_algo()); |
291 | 0 | } |
292 | | |
293 | 0 | bool Policy::allow_client_initiated_renegotiation() const { return false; } |
294 | 0 | bool Policy::allow_server_initiated_renegotiation() const { return false; } |
295 | 30.1k | bool Policy::allow_insecure_renegotiation() const { return false; } |
296 | 25.9k | bool Policy::allow_tls12() const { return true; } |
297 | 13.9k | bool Policy::allow_dtls12() const { return true; } |
298 | 45.1k | bool Policy::include_time_in_hello_random() const { return true; } |
299 | 0 | bool Policy::hide_unknown_users() const { return false; } |
300 | 21.8k | bool Policy::server_uses_own_ciphersuite_preferences() const { return true; } |
301 | 2.27k | bool Policy::negotiate_encrypt_then_mac() const { return true; } |
302 | 2.61k | bool Policy::support_cert_status_message() const { return true; } |
303 | 0 | bool Policy::allow_resumption_for_renegotiation() const { return true; } |
304 | 0 | bool Policy::only_resume_with_exact_version() const { return true; } |
305 | 21.4k | bool Policy::require_client_certificate_authentication() const { return false; } |
306 | 21.4k | bool Policy::request_client_certificate_authentication() const { return require_client_certificate_authentication(); } |
307 | 0 | bool Policy::abort_connection_on_undesired_renegotiation() const { return false; } |
308 | 715 | bool Policy::allow_dtls_epoch0_restart() const { return false; } |
309 | | |
310 | 0 | size_t Policy::maximum_certificate_chain_size() const { return 0; } |
311 | | |
312 | | // 1 second initial timeout, 60 second max - see RFC 6347 sec 4.2.4.1 |
313 | 630 | size_t Policy::dtls_initial_timeout() const { return 1*1000; } |
314 | 630 | size_t Policy::dtls_maximum_timeout() const { return 60*1000; } |
315 | | |
316 | | size_t Policy::dtls_default_mtu() const |
317 | 630 | { |
318 | | // default MTU is IPv6 min MTU minus UDP/IP headers |
319 | 630 | return 1280 - 40 - 8; |
320 | 630 | } |
321 | | |
322 | | std::vector<uint16_t> Policy::srtp_profiles() const |
323 | 0 | { |
324 | 0 | return std::vector<uint16_t>(); |
325 | 0 | } |
326 | | |
327 | | namespace { |
328 | | |
329 | | class Ciphersuite_Preference_Ordering final |
330 | | { |
331 | | public: |
332 | | Ciphersuite_Preference_Ordering(const std::vector<std::string>& ciphers, |
333 | | const std::vector<std::string>& macs, |
334 | | const std::vector<std::string>& kex, |
335 | | const std::vector<std::string>& sigs) : |
336 | 0 | m_ciphers(ciphers), m_macs(macs), m_kex(kex), m_sigs(sigs) {} |
337 | | |
338 | | bool operator()(const Ciphersuite& a, const Ciphersuite& b) const |
339 | 0 | { |
340 | 0 | if(a.kex_method() != b.kex_method()) |
341 | 0 | { |
342 | 0 | for(size_t i = 0; i != m_kex.size(); ++i) |
343 | 0 | { |
344 | 0 | if(a.kex_algo() == m_kex[i]) |
345 | 0 | return true; |
346 | 0 | if(b.kex_algo() == m_kex[i]) |
347 | 0 | return false; |
348 | 0 | } |
349 | 0 | } |
350 | |
|
351 | 0 | if(a.cipher_algo() != b.cipher_algo()) |
352 | 0 | { |
353 | 0 | for(size_t i = 0; i != m_ciphers.size(); ++i) |
354 | 0 | { |
355 | 0 | if(a.cipher_algo() == m_ciphers[i]) |
356 | 0 | return true; |
357 | 0 | if(b.cipher_algo() == m_ciphers[i]) |
358 | 0 | return false; |
359 | 0 | } |
360 | 0 | } |
361 | |
|
362 | 0 | if(a.cipher_keylen() != b.cipher_keylen()) |
363 | 0 | { |
364 | 0 | if(a.cipher_keylen() < b.cipher_keylen()) |
365 | 0 | return false; |
366 | 0 | if(a.cipher_keylen() > b.cipher_keylen()) |
367 | 0 | return true; |
368 | 0 | } |
369 | | |
370 | 0 | if(a.auth_method() != b.auth_method()) |
371 | 0 | { |
372 | 0 | for(size_t i = 0; i != m_sigs.size(); ++i) |
373 | 0 | { |
374 | 0 | if(a.sig_algo() == m_sigs[i]) |
375 | 0 | return true; |
376 | 0 | if(b.sig_algo() == m_sigs[i]) |
377 | 0 | return false; |
378 | 0 | } |
379 | 0 | } |
380 | |
|
381 | 0 | if(a.mac_algo() != b.mac_algo()) |
382 | 0 | { |
383 | 0 | for(size_t i = 0; i != m_macs.size(); ++i) |
384 | 0 | { |
385 | 0 | if(a.mac_algo() == m_macs[i]) |
386 | 0 | return true; |
387 | 0 | if(b.mac_algo() == m_macs[i]) |
388 | 0 | return false; |
389 | 0 | } |
390 | 0 | } |
391 | |
|
392 | 0 | return false; // equal (?!?) |
393 | 0 | } |
394 | | private: |
395 | | std::vector<std::string> m_ciphers, m_macs, m_kex, m_sigs; |
396 | | }; |
397 | | |
398 | | } |
399 | | |
400 | | std::vector<uint16_t> Policy::ciphersuite_list(Protocol_Version version) const |
401 | 0 | { |
402 | 0 | const std::vector<std::string> ciphers = allowed_ciphers(); |
403 | 0 | const std::vector<std::string> macs = allowed_macs(); |
404 | 0 | const std::vector<std::string> kex = allowed_key_exchange_methods(); |
405 | 0 | const std::vector<std::string> sigs = allowed_signature_methods(); |
406 | |
|
407 | 0 | std::vector<Ciphersuite> ciphersuites; |
408 | |
|
409 | 0 | for(auto&& suite : Ciphersuite::all_known_ciphersuites()) |
410 | 0 | { |
411 | | // Can we use it? |
412 | 0 | if(!suite.valid()) |
413 | 0 | continue; |
414 | | |
415 | | // Can we use it in this version? |
416 | 0 | if(!suite.usable_in_version(version)) |
417 | 0 | continue; |
418 | | |
419 | | // Is it acceptable to the policy? |
420 | 0 | if(!this->acceptable_ciphersuite(suite)) |
421 | 0 | continue; |
422 | | |
423 | 0 | if(!value_exists(kex, suite.kex_algo())) |
424 | 0 | continue; // unsupported key exchange |
425 | | |
426 | 0 | if(!value_exists(ciphers, suite.cipher_algo())) |
427 | 0 | continue; // unsupported cipher |
428 | | |
429 | 0 | if(!value_exists(macs, suite.mac_algo())) |
430 | 0 | continue; // unsupported MAC algo |
431 | | |
432 | 0 | if(!value_exists(sigs, suite.sig_algo())) |
433 | 0 | { |
434 | | // allow if it's an empty sig algo and we want to use PSK |
435 | 0 | if(suite.auth_method() != Auth_Method::IMPLICIT || !suite.psk_ciphersuite()) |
436 | 0 | continue; |
437 | 0 | } |
438 | | |
439 | | /* |
440 | | CECPQ1 always uses x25519 for ECDH, so treat the applications |
441 | | removal of x25519 from the ECC curve list as equivalent to |
442 | | saying they do not trust CECPQ1 |
443 | | */ |
444 | 0 | if(suite.kex_method() == Kex_Algo::CECPQ1) |
445 | 0 | { |
446 | 0 | if(value_exists(key_exchange_groups(), Group_Params::X25519) == false) |
447 | 0 | continue; |
448 | 0 | } |
449 | | |
450 | | // OK, consider it |
451 | 0 | ciphersuites.push_back(suite); |
452 | 0 | } |
453 | |
|
454 | 0 | if(ciphersuites.empty()) |
455 | 0 | { |
456 | 0 | throw Invalid_State("Policy does not allow any available cipher suite"); |
457 | 0 | } |
458 | | |
459 | 0 | Ciphersuite_Preference_Ordering order(ciphers, macs, kex, sigs); |
460 | 0 | std::sort(ciphersuites.begin(), ciphersuites.end(), order); |
461 | |
|
462 | 0 | std::vector<uint16_t> ciphersuite_codes; |
463 | 0 | for(auto i : ciphersuites) |
464 | 0 | ciphersuite_codes.push_back(i.ciphersuite_code()); |
465 | 0 | return ciphersuite_codes; |
466 | 0 | } |
467 | | |
468 | | namespace { |
469 | | |
470 | | void print_vec(std::ostream& o, |
471 | | const char* key, |
472 | | const std::vector<std::string>& v) |
473 | 0 | { |
474 | 0 | o << key << " = "; |
475 | 0 | for(size_t i = 0; i != v.size(); ++i) |
476 | 0 | { |
477 | 0 | o << v[i]; |
478 | 0 | if(i != v.size() - 1) |
479 | 0 | o << ' '; |
480 | 0 | } |
481 | 0 | o << '\n'; |
482 | 0 | } |
483 | | |
484 | | void print_vec(std::ostream& o, |
485 | | const char* key, |
486 | | const std::vector<Group_Params>& v) |
487 | 0 | { |
488 | 0 | o << key << " = "; |
489 | 0 | for(size_t i = 0; i != v.size(); ++i) |
490 | 0 | { |
491 | 0 | o << group_param_to_string(v[i]); |
492 | 0 | if(i != v.size() - 1) |
493 | 0 | o << ' '; |
494 | 0 | } |
495 | 0 | o << '\n'; |
496 | 0 | } |
497 | | |
498 | | void print_bool(std::ostream& o, |
499 | | const char* key, bool b) |
500 | 0 | { |
501 | 0 | o << key << " = " << (b ? "true" : "false") << '\n'; |
502 | 0 | } |
503 | | |
504 | | } |
505 | | |
506 | | void Policy::print(std::ostream& o) const |
507 | 0 | { |
508 | 0 | print_bool(o, "allow_tls12", allow_tls12()); |
509 | 0 | print_bool(o, "allow_dtls12", allow_dtls12()); |
510 | 0 | print_vec(o, "ciphers", allowed_ciphers()); |
511 | 0 | print_vec(o, "macs", allowed_macs()); |
512 | 0 | print_vec(o, "signature_hashes", allowed_signature_hashes()); |
513 | 0 | print_vec(o, "signature_methods", allowed_signature_methods()); |
514 | 0 | print_vec(o, "key_exchange_methods", allowed_key_exchange_methods()); |
515 | 0 | print_vec(o, "key_exchange_groups", key_exchange_groups()); |
516 | |
|
517 | 0 | print_bool(o, "allow_insecure_renegotiation", allow_insecure_renegotiation()); |
518 | 0 | print_bool(o, "include_time_in_hello_random", include_time_in_hello_random()); |
519 | 0 | print_bool(o, "allow_server_initiated_renegotiation", allow_server_initiated_renegotiation()); |
520 | 0 | print_bool(o, "hide_unknown_users", hide_unknown_users()); |
521 | 0 | print_bool(o, "server_uses_own_ciphersuite_preferences", server_uses_own_ciphersuite_preferences()); |
522 | 0 | print_bool(o, "negotiate_encrypt_then_mac", negotiate_encrypt_then_mac()); |
523 | 0 | print_bool(o, "support_cert_status_message", support_cert_status_message()); |
524 | 0 | o << "session_ticket_lifetime = " << session_ticket_lifetime() << '\n'; |
525 | 0 | o << "minimum_dh_group_size = " << minimum_dh_group_size() << '\n'; |
526 | 0 | o << "minimum_ecdh_group_size = " << minimum_ecdh_group_size() << '\n'; |
527 | 0 | o << "minimum_rsa_bits = " << minimum_rsa_bits() << '\n'; |
528 | 0 | o << "minimum_signature_strength = " << minimum_signature_strength() << '\n'; |
529 | 0 | } |
530 | | |
531 | | std::string Policy::to_string() const |
532 | 0 | { |
533 | 0 | std::ostringstream oss; |
534 | 0 | this->print(oss); |
535 | 0 | return oss.str(); |
536 | 0 | } |
537 | | |
538 | | std::vector<std::string> Strict_Policy::allowed_ciphers() const |
539 | 0 | { |
540 | 0 | return { "ChaCha20Poly1305", "AES-256/GCM", "AES-128/GCM" }; |
541 | 0 | } |
542 | | |
543 | | std::vector<std::string> Strict_Policy::allowed_signature_hashes() const |
544 | 0 | { |
545 | 0 | return { "SHA-512", "SHA-384"}; |
546 | 0 | } |
547 | | |
548 | | std::vector<std::string> Strict_Policy::allowed_macs() const |
549 | 0 | { |
550 | 0 | return { "AEAD" }; |
551 | 0 | } |
552 | | |
553 | | std::vector<std::string> Strict_Policy::allowed_key_exchange_methods() const |
554 | 0 | { |
555 | 0 | return { "CECPQ1", "ECDH" }; |
556 | 0 | } |
557 | | |
558 | 0 | bool Strict_Policy::allow_tls12() const { return true; } |
559 | 0 | bool Strict_Policy::allow_dtls12() const { return true; } |
560 | | |
561 | | } |
562 | | |
563 | | } |