1 #pragma once
2
3 #include "bmcweb_config.h"
4
5 #include "logging.hpp"
6 #include "ossl_random.hpp"
7 #include "persistent_data.hpp"
8
9 #include <boost/beast/core/file_posix.hpp>
10
11 extern "C"
12 {
13 #include <nghttp2/nghttp2.h>
14 #include <openssl/bio.h>
15 #include <openssl/dh.h>
16 #include <openssl/dsa.h>
17 #include <openssl/err.h>
18 #include <openssl/evp.h>
19 #include <openssl/pem.h>
20 #include <openssl/rand.h>
21 #include <openssl/rsa.h>
22 #include <openssl/ssl.h>
23 }
24
25 #include <boost/asio/ssl/context.hpp>
26 #include <boost/system/error_code.hpp>
27
28 #include <filesystem>
29 #include <memory>
30 #include <optional>
31 #include <random>
32 #include <string>
33
34 namespace ensuressl
35 {
36 constexpr const char* trustStorePath = "/etc/ssl/certs/authority";
37 constexpr const char* x509Comment = "Generated from OpenBMC service";
38 static void initOpenssl();
39 static EVP_PKEY* createEcKey();
40
41 // Trust chain related errors.`
isTrustChainError(int errnum)42 inline bool isTrustChainError(int errnum)
43 {
44 return (errnum == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ||
45 (errnum == X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN) ||
46 (errnum == X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY) ||
47 (errnum == X509_V_ERR_CERT_UNTRUSTED) ||
48 (errnum == X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE);
49 }
50
validateCertificate(X509 * const cert)51 inline bool validateCertificate(X509* const cert)
52 {
53 // Create an empty X509_STORE structure for certificate validation.
54 X509_STORE* x509Store = X509_STORE_new();
55 if (x509Store == nullptr)
56 {
57 BMCWEB_LOG_ERROR("Error occurred during X509_STORE_new call");
58 return false;
59 }
60
61 // Load Certificate file into the X509 structure.
62 X509_STORE_CTX* storeCtx = X509_STORE_CTX_new();
63 if (storeCtx == nullptr)
64 {
65 BMCWEB_LOG_ERROR("Error occurred during X509_STORE_CTX_new call");
66 X509_STORE_free(x509Store);
67 return false;
68 }
69
70 int errCode = X509_STORE_CTX_init(storeCtx, x509Store, cert, nullptr);
71 if (errCode != 1)
72 {
73 BMCWEB_LOG_ERROR("Error occurred during X509_STORE_CTX_init call");
74 X509_STORE_CTX_free(storeCtx);
75 X509_STORE_free(x509Store);
76 return false;
77 }
78
79 errCode = X509_verify_cert(storeCtx);
80 if (errCode == 1)
81 {
82 BMCWEB_LOG_INFO("Certificate verification is success");
83 X509_STORE_CTX_free(storeCtx);
84 X509_STORE_free(x509Store);
85 return true;
86 }
87 if (errCode == 0)
88 {
89 errCode = X509_STORE_CTX_get_error(storeCtx);
90 X509_STORE_CTX_free(storeCtx);
91 X509_STORE_free(x509Store);
92 if (isTrustChainError(errCode))
93 {
94 BMCWEB_LOG_DEBUG("Ignoring Trust Chain error. Reason: {}",
95 X509_verify_cert_error_string(errCode));
96 return true;
97 }
98 BMCWEB_LOG_ERROR("Certificate verification failed. Reason: {}",
99 X509_verify_cert_error_string(errCode));
100 return false;
101 }
102
103 BMCWEB_LOG_ERROR(
104 "Error occurred during X509_verify_cert call. ErrorCode: {}", errCode);
105 X509_STORE_CTX_free(storeCtx);
106 X509_STORE_free(x509Store);
107 return false;
108 }
109
verifyOpensslKeyCert(const std::string & filepath)110 inline std::string verifyOpensslKeyCert(const std::string& filepath)
111 {
112 bool privateKeyValid = false;
113
114 BMCWEB_LOG_INFO("Checking certs in file {}", filepath);
115 boost::beast::file_posix file;
116 boost::system::error_code ec;
117 file.open(filepath.c_str(), boost::beast::file_mode::read, ec);
118 if (ec)
119 {
120 return "";
121 }
122 bool certValid = false;
123 std::string fileContents;
124 fileContents.resize(static_cast<size_t>(file.size(ec)), '\0');
125 file.read(fileContents.data(), fileContents.size(), ec);
126 if (ec)
127 {
128 BMCWEB_LOG_ERROR("Failed to read file");
129 return "";
130 }
131
132 BIO* bufio = BIO_new_mem_buf(static_cast<void*>(fileContents.data()),
133 static_cast<int>(fileContents.size()));
134 EVP_PKEY* pkey = PEM_read_bio_PrivateKey(bufio, nullptr, nullptr, nullptr);
135 BIO_free(bufio);
136 if (pkey != nullptr)
137 {
138 #if (OPENSSL_VERSION_NUMBER < 0x30000000L)
139 RSA* rsa = EVP_PKEY_get1_RSA(pkey);
140 if (rsa != nullptr)
141 {
142 BMCWEB_LOG_INFO("Found an RSA key");
143 if (RSA_check_key(rsa) == 1)
144 {
145 privateKeyValid = true;
146 }
147 else
148 {
149 BMCWEB_LOG_ERROR("Key not valid error number {}",
150 ERR_get_error());
151 }
152 RSA_free(rsa);
153 }
154 else
155 {
156 EC_KEY* ec = EVP_PKEY_get1_EC_KEY(pkey);
157 if (ec != nullptr)
158 {
159 BMCWEB_LOG_INFO("Found an EC key");
160 if (EC_KEY_check_key(ec) == 1)
161 {
162 privateKeyValid = true;
163 }
164 else
165 {
166 BMCWEB_LOG_ERROR("Key not valid error number {}",
167 ERR_get_error());
168 }
169 EC_KEY_free(ec);
170 }
171 }
172 #else
173 EVP_PKEY_CTX* pkeyCtx = EVP_PKEY_CTX_new_from_pkey(nullptr, pkey,
174 nullptr);
175
176 if (pkeyCtx == nullptr)
177 {
178 BMCWEB_LOG_ERROR("Unable to allocate pkeyCtx {}", ERR_get_error());
179 }
180 else if (EVP_PKEY_check(pkeyCtx) == 1)
181 {
182 privateKeyValid = true;
183 }
184 else
185 {
186 BMCWEB_LOG_ERROR("Key not valid error number {}", ERR_get_error());
187 }
188 #endif
189
190 if (privateKeyValid)
191 {
192 BIO* bufio2 =
193 BIO_new_mem_buf(static_cast<void*>(fileContents.data()),
194 static_cast<int>(fileContents.size()));
195 X509* x509 = PEM_read_bio_X509(bufio2, nullptr, nullptr, nullptr);
196 BIO_free(bufio2);
197 if (x509 == nullptr)
198 {
199 BMCWEB_LOG_ERROR("error getting x509 cert {}", ERR_get_error());
200 }
201 else
202 {
203 certValid = validateCertificate(x509);
204 X509_free(x509);
205 }
206 }
207
208 #if (OPENSSL_VERSION_NUMBER > 0x30000000L)
209 EVP_PKEY_CTX_free(pkeyCtx);
210 #endif
211 EVP_PKEY_free(pkey);
212 }
213 if (!certValid)
214 {
215 return "";
216 }
217 return fileContents;
218 }
219
loadCert(const std::string & filePath)220 inline X509* loadCert(const std::string& filePath)
221 {
222 BIO* certFileBio = BIO_new_file(filePath.c_str(), "rb");
223 if (certFileBio == nullptr)
224 {
225 BMCWEB_LOG_ERROR("Error occurred during BIO_new_file call, FILE= {}",
226 filePath);
227 return nullptr;
228 }
229
230 X509* cert = X509_new();
231 if (cert == nullptr)
232 {
233 BMCWEB_LOG_ERROR("Error occurred during X509_new call, {}",
234 ERR_get_error());
235 BIO_free(certFileBio);
236 return nullptr;
237 }
238
239 if (PEM_read_bio_X509(certFileBio, &cert, nullptr, nullptr) == nullptr)
240 {
241 BMCWEB_LOG_ERROR(
242 "Error occurred during PEM_read_bio_X509 call, FILE= {}", filePath);
243
244 BIO_free(certFileBio);
245 X509_free(cert);
246 return nullptr;
247 }
248 BIO_free(certFileBio);
249 return cert;
250 }
251
addExt(X509 * cert,int nid,const char * value)252 inline int addExt(X509* cert, int nid, const char* value)
253 {
254 X509_EXTENSION* ex = nullptr;
255 X509V3_CTX ctx{};
256 X509V3_set_ctx(&ctx, cert, cert, nullptr, nullptr, 0);
257
258 // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
259 ex = X509V3_EXT_conf_nid(nullptr, &ctx, nid, const_cast<char*>(value));
260 if (ex == nullptr)
261 {
262 BMCWEB_LOG_ERROR("Error: In X509V3_EXT_conf_nidn: {}", value);
263 return -1;
264 }
265 X509_add_ext(cert, ex, -1);
266 X509_EXTENSION_free(ex);
267 return 0;
268 }
269
270 // Writes a certificate to a path, ignoring errors
writeCertificateToFile(const std::string & filepath,const std::string & certificate)271 inline void writeCertificateToFile(const std::string& filepath,
272 const std::string& certificate)
273 {
274 boost::system::error_code ec;
275 boost::beast::file_posix file;
276 file.open(filepath.c_str(), boost::beast::file_mode::write, ec);
277 if (!ec)
278 {
279 file.write(certificate.data(), certificate.size(), ec);
280 // ignore result
281 }
282 }
283
generateSslCertificate(const std::string & cn)284 inline std::string generateSslCertificate(const std::string& cn)
285 {
286 BMCWEB_LOG_INFO("Generating new keys");
287 initOpenssl();
288
289 std::string buffer;
290 BMCWEB_LOG_INFO("Generating EC key");
291 EVP_PKEY* pPrivKey = createEcKey();
292 if (pPrivKey != nullptr)
293 {
294 BMCWEB_LOG_INFO("Generating x509 Certificates");
295 // Use this code to directly generate a certificate
296 X509* x509 = X509_new();
297 if (x509 != nullptr)
298 {
299 // get a random number from the RNG for the certificate serial
300 // number If this is not random, regenerating certs throws browser
301 // errors
302 bmcweb::OpenSSLGenerator gen;
303 std::uniform_int_distribution<int> dis(
304 1, std::numeric_limits<int>::max());
305 int serial = dis(gen);
306
307 ASN1_INTEGER_set(X509_get_serialNumber(x509), serial);
308
309 // not before this moment
310 X509_gmtime_adj(X509_get_notBefore(x509), 0);
311 // Cert is valid for 10 years
312 X509_gmtime_adj(X509_get_notAfter(x509),
313 60L * 60L * 24L * 365L * 10L);
314
315 // set the public key to the key we just generated
316 X509_set_pubkey(x509, pPrivKey);
317
318 // get the subject name
319 X509_NAME* name = X509_get_subject_name(x509);
320
321 using x509String = const unsigned char;
322 // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
323 x509String* country = reinterpret_cast<x509String*>("US");
324 // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
325 x509String* company = reinterpret_cast<x509String*>("OpenBMC");
326 // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
327 x509String* cnStr = reinterpret_cast<x509String*>(cn.c_str());
328
329 X509_NAME_add_entry_by_txt(name, "C", MBSTRING_ASC, country, -1, -1,
330 0);
331 X509_NAME_add_entry_by_txt(name, "O", MBSTRING_ASC, company, -1, -1,
332 0);
333 X509_NAME_add_entry_by_txt(name, "CN", MBSTRING_ASC, cnStr, -1, -1,
334 0);
335 // set the CSR options
336 X509_set_issuer_name(x509, name);
337
338 X509_set_version(x509, 2);
339 addExt(x509, NID_basic_constraints, ("critical,CA:TRUE"));
340 addExt(x509, NID_subject_alt_name, ("DNS:" + cn).c_str());
341 addExt(x509, NID_subject_key_identifier, ("hash"));
342 addExt(x509, NID_authority_key_identifier, ("keyid"));
343 addExt(x509, NID_key_usage, ("digitalSignature, keyEncipherment"));
344 addExt(x509, NID_ext_key_usage, ("serverAuth"));
345 addExt(x509, NID_netscape_comment, (x509Comment));
346
347 // Sign the certificate with our private key
348 X509_sign(x509, pPrivKey, EVP_sha256());
349
350 BIO* bufio = BIO_new(BIO_s_mem());
351
352 int pkeyRet = PEM_write_bio_PrivateKey(
353 bufio, pPrivKey, nullptr, nullptr, 0, nullptr, nullptr);
354 if (pkeyRet <= 0)
355 {
356 BMCWEB_LOG_ERROR(
357 "Failed to write pkey with code {}. Ignoring.", pkeyRet);
358 }
359
360 char* data = nullptr;
361 long int dataLen = BIO_get_mem_data(bufio, &data);
362 buffer += std::string_view(data, static_cast<size_t>(dataLen));
363 BIO_free(bufio);
364
365 bufio = BIO_new(BIO_s_mem());
366 pkeyRet = PEM_write_bio_X509(bufio, x509);
367 if (pkeyRet <= 0)
368 {
369 BMCWEB_LOG_ERROR(
370 "Failed to write X509 with code {}. Ignoring.", pkeyRet);
371 }
372 dataLen = BIO_get_mem_data(bufio, &data);
373 buffer += std::string_view(data, static_cast<size_t>(dataLen));
374
375 BIO_free(bufio);
376 BMCWEB_LOG_INFO("Cert size is {}", buffer.size());
377 X509_free(x509);
378 }
379
380 EVP_PKEY_free(pPrivKey);
381 pPrivKey = nullptr;
382 }
383
384 // cleanup_openssl();
385 return buffer;
386 }
387
createEcKey()388 EVP_PKEY* createEcKey()
389 {
390 EVP_PKEY* pKey = nullptr;
391
392 #if (OPENSSL_VERSION_NUMBER < 0x30000000L)
393 int eccgrp = 0;
394 eccgrp = OBJ_txt2nid("secp384r1");
395
396 EC_KEY* myecc = EC_KEY_new_by_curve_name(eccgrp);
397 if (myecc != nullptr)
398 {
399 EC_KEY_set_asn1_flag(myecc, OPENSSL_EC_NAMED_CURVE);
400 EC_KEY_generate_key(myecc);
401 pKey = EVP_PKEY_new();
402 if (pKey != nullptr)
403 {
404 if (EVP_PKEY_assign(pKey, EVP_PKEY_EC, myecc) != 0)
405 {
406 /* pKey owns myecc from now */
407 if (EC_KEY_check_key(myecc) <= 0)
408 {
409 BMCWEB_LOG_ERROR("EC_check_key failed.");
410 }
411 }
412 }
413 }
414 #else
415 // Create context for curve parameter generation.
416 std::unique_ptr<EVP_PKEY_CTX, decltype(&::EVP_PKEY_CTX_free)> ctx{
417 EVP_PKEY_CTX_new_id(EVP_PKEY_EC, nullptr), &::EVP_PKEY_CTX_free};
418 if (!ctx)
419 {
420 return nullptr;
421 }
422
423 // Set up curve parameters.
424 EVP_PKEY* params = nullptr;
425 if ((EVP_PKEY_paramgen_init(ctx.get()) <= 0) ||
426 (EVP_PKEY_CTX_set_ec_param_enc(ctx.get(), OPENSSL_EC_NAMED_CURVE) <=
427 0) ||
428 (EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx.get(), NID_secp384r1) <=
429 0) ||
430 (EVP_PKEY_paramgen(ctx.get(), ¶ms) <= 0))
431 {
432 return nullptr;
433 }
434
435 // Set up RAII holder for params.
436 std::unique_ptr<EVP_PKEY, decltype(&::EVP_PKEY_free)> pparams{
437 params, &::EVP_PKEY_free};
438
439 // Set new context for key generation, using curve parameters.
440 ctx.reset(EVP_PKEY_CTX_new_from_pkey(nullptr, params, nullptr));
441 if (!ctx || (EVP_PKEY_keygen_init(ctx.get()) <= 0))
442 {
443 return nullptr;
444 }
445
446 // Generate key.
447 if (EVP_PKEY_keygen(ctx.get(), &pKey) <= 0)
448 {
449 return nullptr;
450 }
451 #endif
452
453 return pKey;
454 }
455
initOpenssl()456 void initOpenssl()
457 {
458 #if OPENSSL_VERSION_NUMBER < 0x10100000L
459 SSL_load_error_strings();
460 OpenSSL_add_all_algorithms();
461 RAND_load_file("/dev/urandom", 1024);
462 #endif
463 }
464
ensureOpensslKeyPresentAndValid(const std::string & filepath)465 inline std::string ensureOpensslKeyPresentAndValid(const std::string& filepath)
466 {
467 std::string cert = verifyOpensslKeyCert(filepath);
468
469 if (cert.empty())
470 {
471 BMCWEB_LOG_WARNING("Error in verifying signature, regenerating");
472 cert = generateSslCertificate("testhost");
473 if (cert.empty())
474 {
475 BMCWEB_LOG_ERROR("Failed to generate cert");
476 }
477 else
478 {
479 writeCertificateToFile(filepath, cert);
480 }
481 }
482 return cert;
483 }
484
ensureCertificate()485 inline std::string ensureCertificate()
486 {
487 namespace fs = std::filesystem;
488 // Cleanup older certificate file existing in the system
489 fs::path oldcertPath = fs::path("/home/root/server.pem");
490 std::error_code ec;
491 fs::remove(oldcertPath, ec);
492 // Ignore failure to remove; File might not exist.
493
494 fs::path certPath = "/etc/ssl/certs/https/";
495 // if path does not exist create the path so that
496 // self signed certificate can be created in the
497 // path
498 fs::path certFile = certPath / "server.pem";
499
500 if (!fs::exists(certPath, ec))
501 {
502 fs::create_directories(certPath, ec);
503 }
504 BMCWEB_LOG_INFO("Building SSL Context file= {}", certFile.string());
505 std::string sslPemFile(certFile);
506 return ensuressl::ensureOpensslKeyPresentAndValid(sslPemFile);
507 }
508
nextProtoCallback(SSL *,const unsigned char ** data,unsigned int * len,void *)509 inline int nextProtoCallback(SSL* /*unused*/, const unsigned char** data,
510 unsigned int* len, void* /*unused*/)
511 {
512 // First byte is the length.
513 constexpr std::string_view h2 = "\x02h2";
514 *data = std::bit_cast<const unsigned char*>(h2.data());
515 *len = static_cast<unsigned int>(h2.size());
516 return SSL_TLSEXT_ERR_OK;
517 }
518
alpnSelectProtoCallback(SSL *,const unsigned char ** out,unsigned char * outlen,const unsigned char * in,unsigned int inlen,void *)519 inline int alpnSelectProtoCallback(SSL* /*unused*/, const unsigned char** out,
520 unsigned char* outlen,
521 const unsigned char* in, unsigned int inlen,
522 void* /*unused*/)
523 {
524 // There's a mismatch in constness for nghttp2_select_next_protocol. The
525 // examples in nghttp2 don't show this problem. Unclear what the right fix
526 // is here.
527
528 // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
529 unsigned char** outNew = const_cast<unsigned char**>(out);
530 int rv = nghttp2_select_next_protocol(outNew, outlen, in, inlen);
531 if (rv != 1)
532 {
533 return SSL_TLSEXT_ERR_NOACK;
534 }
535
536 return SSL_TLSEXT_ERR_OK;
537 }
538
getSslContext(boost::asio::ssl::context & mSslContext,const std::string & sslPemFile)539 inline bool getSslContext(boost::asio::ssl::context& mSslContext,
540 const std::string& sslPemFile)
541 {
542 mSslContext.set_options(boost::asio::ssl::context::default_workarounds |
543 boost::asio::ssl::context::no_sslv2 |
544 boost::asio::ssl::context::no_sslv3 |
545 boost::asio::ssl::context::single_dh_use |
546 boost::asio::ssl::context::no_tlsv1 |
547 boost::asio::ssl::context::no_tlsv1_1);
548
549 BMCWEB_LOG_DEBUG("Using default TrustStore location: {}", trustStorePath);
550 mSslContext.add_verify_path(trustStorePath);
551
552 if (!sslPemFile.empty())
553 {
554 boost::system::error_code ec;
555
556 boost::asio::const_buffer buf(sslPemFile.data(), sslPemFile.size());
557 mSslContext.use_certificate(buf, boost::asio::ssl::context::pem, ec);
558 if (ec)
559 {
560 return false;
561 }
562 mSslContext.use_private_key(buf, boost::asio::ssl::context::pem, ec);
563 if (ec)
564 {
565 BMCWEB_LOG_CRITICAL("Failed to open ssl pkey");
566 return false;
567 }
568 }
569
570 // Set up EC curves to auto (boost asio doesn't have a method for this)
571 // There is a pull request to add this. Once this is included in an asio
572 // drop, use the right way
573 // http://stackoverflow.com/questions/18929049/boost-asio-with-ecdsa-certificate-issue
574 if (SSL_CTX_set_ecdh_auto(mSslContext->native_handle(), 1) != 1)
575 {}
576
577 // Mozilla intermediate cipher suites v5.7
578 // Sourced from: https://ssl-config.mozilla.org/guidelines/5.7.json
579 const char* mozillaIntermediate = "ECDHE-ECDSA-AES128-GCM-SHA256:"
580 "ECDHE-RSA-AES128-GCM-SHA256:"
581 "ECDHE-ECDSA-AES256-GCM-SHA384:"
582 "ECDHE-RSA-AES256-GCM-SHA384:"
583 "ECDHE-ECDSA-CHACHA20-POLY1305:"
584 "ECDHE-RSA-CHACHA20-POLY1305:"
585 "DHE-RSA-AES128-GCM-SHA256:"
586 "DHE-RSA-AES256-GCM-SHA384:"
587 "DHE-RSA-CHACHA20-POLY1305";
588
589 if (SSL_CTX_set_cipher_list(mSslContext.native_handle(),
590 mozillaIntermediate) != 1)
591 {
592 BMCWEB_LOG_ERROR("Error setting cipher list");
593 return false;
594 }
595 return true;
596 }
597
getSslServerContext()598 inline std::shared_ptr<boost::asio::ssl::context> getSslServerContext()
599 {
600 boost::asio::ssl::context sslCtx(boost::asio::ssl::context::tls_server);
601
602 auto certFile = ensureCertificate();
603 if (!getSslContext(sslCtx, certFile))
604 {
605 BMCWEB_LOG_CRITICAL("Couldn't get server context");
606 return nullptr;
607 }
608 const persistent_data::AuthConfigMethods& c =
609 persistent_data::SessionStore::getInstance().getAuthMethodsConfig();
610
611 boost::asio::ssl::verify_mode mode = boost::asio::ssl::verify_peer;
612 if (c.tlsStrict)
613 {
614 BMCWEB_LOG_DEBUG("Setting verify peer");
615 mode |= boost::asio::ssl::verify_fail_if_no_peer_cert;
616 }
617
618 boost::system::error_code ec;
619 sslCtx.set_verify_mode(mode, ec);
620 if (ec)
621 {
622 BMCWEB_LOG_DEBUG("Failed to set verify mode {}", ec.message());
623 return nullptr;
624 }
625 SSL_CTX_set_options(sslCtx.native_handle(), SSL_OP_NO_RENEGOTIATION);
626
627 if constexpr (BMCWEB_EXPERIMENTAL_HTTP2)
628 {
629 SSL_CTX_set_next_protos_advertised_cb(sslCtx.native_handle(),
630 nextProtoCallback, nullptr);
631
632 SSL_CTX_set_alpn_select_cb(sslCtx.native_handle(),
633 alpnSelectProtoCallback, nullptr);
634 }
635
636 return std::make_shared<boost::asio::ssl::context>(std::move(sslCtx));
637 }
638
getSSLClientContext()639 inline std::optional<boost::asio::ssl::context> getSSLClientContext()
640 {
641 namespace fs = std::filesystem;
642
643 boost::asio::ssl::context sslCtx(boost::asio::ssl::context::tls_client);
644
645 // NOTE, this path is temporary; In the future it will need to change to
646 // be set per subscription. Do not rely on this.
647 fs::path certPath = "/etc/ssl/certs/https/client.pem";
648 std::string cert = verifyOpensslKeyCert(certPath);
649
650 if (!getSslContext(sslCtx, cert))
651 {
652 return std::nullopt;
653 }
654
655 // Add a directory containing certificate authority files to be used
656 // for performing verification.
657 boost::system::error_code ec;
658 sslCtx.set_default_verify_paths(ec);
659 if (ec)
660 {
661 BMCWEB_LOG_ERROR("SSL context set_default_verify failed");
662 return std::nullopt;
663 }
664
665 // Verify the remote server's certificate
666 sslCtx.set_verify_mode(boost::asio::ssl::verify_peer, ec);
667 if (ec)
668 {
669 BMCWEB_LOG_ERROR("SSL context set_verify_mode failed");
670 return std::nullopt;
671 }
672
673 // All cipher suites are set as per OWASP datasheet.
674 // https://cheatsheetseries.owasp.org/cheatsheets/TLS_Cipher_String_Cheat_Sheet.html
675 constexpr const char* sslCiphers = "ECDHE-ECDSA-AES128-GCM-SHA256:"
676 "ECDHE-RSA-AES128-GCM-SHA256:"
677 "ECDHE-ECDSA-AES256-GCM-SHA384:"
678 "ECDHE-RSA-AES256-GCM-SHA384:"
679 "ECDHE-ECDSA-CHACHA20-POLY1305:"
680 "ECDHE-RSA-CHACHA20-POLY1305:"
681 "DHE-RSA-AES128-GCM-SHA256:"
682 "DHE-RSA-AES256-GCM-SHA384"
683 "TLS_AES_128_GCM_SHA256:"
684 "TLS_AES_256_GCM_SHA384:"
685 "TLS_CHACHA20_POLY1305_SHA256";
686
687 if (SSL_CTX_set_cipher_list(sslCtx.native_handle(), sslCiphers) != 1)
688 {
689 BMCWEB_LOG_ERROR("SSL_CTX_set_cipher_list failed");
690 return std::nullopt;
691 }
692
693 return {std::move(sslCtx)};
694 }
695
696 } // namespace ensuressl
697