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Commit | Line | Data |
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f484cdf5 | 1 | /* |
ef57eb7b | 2 | * Copyright (C) 1996-2016 The Squid Software Foundation and contributors |
f484cdf5 | 3 | * |
bbc27441 AJ |
4 | * Squid software is distributed under GPLv2+ license and includes |
5 | * contributions from numerous individuals and organizations. | |
6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
f484cdf5 | 7 | */ |
8 | ||
bbc27441 AJ |
9 | /* DEBUG: section 83 SSL accelerator support */ |
10 | ||
582c2af2 | 11 | #include "squid.h" |
454e8283 | 12 | |
13 | /* MS Visual Studio Projects are monolithic, so we need the following | |
14 | * #if to exclude the SSL code from compile process when not needed. | |
15 | */ | |
cb4f4424 | 16 | #if USE_OPENSSL |
454e8283 | 17 | |
c0941a6a | 18 | #include "acl/FilledChecklist.h" |
86660d64 | 19 | #include "anyp/PortCfg.h" |
ed6e9fb9 | 20 | #include "fatal.h" |
b3a8ae1b | 21 | #include "fd.h" |
582c2af2 FC |
22 | #include "fde.h" |
23 | #include "globals.h" | |
86c63190 | 24 | #include "ipc/MemMap.h" |
92e3827b | 25 | #include "security/CertError.h" |
4d5904f7 | 26 | #include "SquidConfig.h" |
10a69fc0 | 27 | #include "SquidTime.h" |
b3a8ae1b | 28 | #include "ssl/bio.h" |
2cef0ca6 | 29 | #include "ssl/Config.h" |
4d16918e | 30 | #include "ssl/ErrorDetail.h" |
95d2589c | 31 | #include "ssl/gadgets.h" |
602d9612 | 32 | #include "ssl/support.h" |
fc54b8d2 | 33 | #include "URL.h" |
f484cdf5 | 34 | |
1a30fdf5 | 35 | #include <cerrno> |
21d845b1 | 36 | |
55369ae6 AR |
37 | // TODO: Move ssl_ex_index_* global variables from global.cc here. |
38 | int ssl_ex_index_ssl_untrusted_chain = -1; | |
39 | ||
824d4656 AJ |
40 | Ipc::MemMap *Ssl::SessionCache = NULL; |
41 | const char *Ssl::SessionCacheName = "ssl_session_cache"; | |
10a69fc0 | 42 | |
55369ae6 AR |
43 | static Ssl::CertsIndexedList SquidUntrustedCerts; |
44 | ||
3c26b00a CT |
45 | const EVP_MD *Ssl::DefaultSignHash = NULL; |
46 | ||
caf3666d AR |
47 | const char *Ssl::BumpModeStr[] = { |
48 | "none", | |
49 | "client-first", | |
50 | "server-first", | |
5d65362c CT |
51 | "peek", |
52 | "stare", | |
53 | "bump", | |
7f4e9b73 | 54 | "splice", |
5d65362c | 55 | "terminate", |
1110989a | 56 | /*"err",*/ |
caf3666d AR |
57 | NULL |
58 | }; | |
59 | ||
63be0a78 | 60 | /** |
61 | \defgroup ServerProtocolSSLInternal Server-Side SSL Internals | |
62 | \ingroup ServerProtocolSSLAPI | |
63 | */ | |
64 | ||
65 | /// \ingroup ServerProtocolSSLInternal | |
307b83b7 | 66 | static int |
67 | ssl_ask_password_cb(char *buf, int size, int rwflag, void *userdata) | |
68 | { | |
69 | FILE *in; | |
70 | int len = 0; | |
71 | char cmdline[1024]; | |
72 | ||
73 | snprintf(cmdline, sizeof(cmdline), "\"%s\" \"%s\"", Config.Program.ssl_password, (const char *)userdata); | |
74 | in = popen(cmdline, "r"); | |
75 | ||
76 | if (fgets(buf, size, in)) | |
77 | ||
78 | len = strlen(buf); | |
79 | ||
80 | while (len > 0 && (buf[len - 1] == '\n' || buf[len - 1] == '\r')) | |
5e263176 | 81 | --len; |
307b83b7 | 82 | |
83 | buf[len] = '\0'; | |
84 | ||
85 | pclose(in); | |
86 | ||
87 | return len; | |
88 | } | |
89 | ||
63be0a78 | 90 | /// \ingroup ServerProtocolSSLInternal |
307b83b7 | 91 | static void |
92 | ssl_ask_password(SSL_CTX * context, const char * prompt) | |
93 | { | |
94 | if (Config.Program.ssl_password) { | |
95 | SSL_CTX_set_default_passwd_cb(context, ssl_ask_password_cb); | |
96 | SSL_CTX_set_default_passwd_cb_userdata(context, (void *)prompt); | |
97 | } | |
98 | } | |
99 | ||
63be0a78 | 100 | /// \ingroup ServerProtocolSSLInternal |
f484cdf5 | 101 | static RSA * |
e6ccf245 | 102 | ssl_temp_rsa_cb(SSL * ssl, int anInt, int keylen) |
f484cdf5 | 103 | { |
e01f02ed | 104 | static RSA *rsa_512 = NULL; |
105 | static RSA *rsa_1024 = NULL; | |
106 | RSA *rsa = NULL; | |
107 | int newkey = 0; | |
f484cdf5 | 108 | |
e01f02ed | 109 | switch (keylen) { |
110 | ||
111 | case 512: | |
112 | ||
113 | if (!rsa_512) { | |
114 | rsa_512 = RSA_generate_key(512, RSA_F4, NULL, NULL); | |
115 | newkey = 1; | |
116 | } | |
117 | ||
118 | rsa = rsa_512; | |
119 | break; | |
120 | ||
121 | case 1024: | |
122 | ||
123 | if (!rsa_1024) { | |
124 | rsa_1024 = RSA_generate_key(1024, RSA_F4, NULL, NULL); | |
125 | newkey = 1; | |
126 | } | |
127 | ||
128 | rsa = rsa_1024; | |
129 | break; | |
130 | ||
131 | default: | |
e0236918 | 132 | debugs(83, DBG_IMPORTANT, "ssl_temp_rsa_cb: Unexpected key length " << keylen); |
e01f02ed | 133 | return NULL; |
134 | } | |
135 | ||
136 | if (rsa == NULL) { | |
e0236918 | 137 | debugs(83, DBG_IMPORTANT, "ssl_temp_rsa_cb: Failed to generate key " << keylen); |
e01f02ed | 138 | return NULL; |
139 | } | |
140 | ||
141 | if (newkey) { | |
014adac1 | 142 | if (Debug::Enabled(83, 5)) |
e01f02ed | 143 | PEM_write_RSAPrivateKey(debug_log, rsa, NULL, NULL, 0, NULL, NULL); |
144 | ||
e0236918 | 145 | debugs(83, DBG_IMPORTANT, "Generated ephemeral RSA key of length " << keylen); |
e01f02ed | 146 | } |
62e76326 | 147 | |
f484cdf5 | 148 | return rsa; |
149 | } | |
150 | ||
4d16918e CT |
151 | int Ssl::asn1timeToString(ASN1_TIME *tm, char *buf, int len) |
152 | { | |
153 | BIO *bio; | |
154 | int write = 0; | |
155 | bio = BIO_new(BIO_s_mem()); | |
156 | if (bio) { | |
e34763f4 A |
157 | if (ASN1_TIME_print(bio, tm)) |
158 | write = BIO_read(bio, buf, len-1); | |
159 | BIO_free(bio); | |
4d16918e CT |
160 | } |
161 | buf[write]='\0'; | |
162 | return write; | |
163 | } | |
164 | ||
165 | int Ssl::matchX509CommonNames(X509 *peer_cert, void *check_data, int (*check_func)(void *check_data, ASN1_STRING *cn_data)) | |
166 | { | |
167 | assert(peer_cert); | |
168 | ||
169 | X509_NAME *name = X509_get_subject_name(peer_cert); | |
170 | ||
171 | for (int i = X509_NAME_get_index_by_NID(name, NID_commonName, -1); i >= 0; i = X509_NAME_get_index_by_NID(name, NID_commonName, i)) { | |
e34763f4 | 172 | |
4d16918e CT |
173 | ASN1_STRING *cn_data = X509_NAME_ENTRY_get_data(X509_NAME_get_entry(name, i)); |
174 | ||
175 | if ( (*check_func)(check_data, cn_data) == 0) | |
176 | return 1; | |
177 | } | |
178 | ||
179 | STACK_OF(GENERAL_NAME) * altnames; | |
180 | altnames = (STACK_OF(GENERAL_NAME)*)X509_get_ext_d2i(peer_cert, NID_subject_alt_name, NULL, NULL); | |
181 | ||
182 | if (altnames) { | |
183 | int numalts = sk_GENERAL_NAME_num(altnames); | |
d7ae3534 | 184 | for (int i = 0; i < numalts; ++i) { |
4d16918e CT |
185 | const GENERAL_NAME *check = sk_GENERAL_NAME_value(altnames, i); |
186 | if (check->type != GEN_DNS) { | |
187 | continue; | |
188 | } | |
189 | ASN1_STRING *cn_data = check->d.dNSName; | |
e34763f4 | 190 | |
40dd2b59 CT |
191 | if ( (*check_func)(check_data, cn_data) == 0) { |
192 | sk_GENERAL_NAME_pop_free(altnames, GENERAL_NAME_free); | |
4d16918e | 193 | return 1; |
40dd2b59 | 194 | } |
4d16918e CT |
195 | } |
196 | sk_GENERAL_NAME_pop_free(altnames, GENERAL_NAME_free); | |
197 | } | |
198 | return 0; | |
199 | } | |
200 | ||
201 | static int check_domain( void *check_data, ASN1_STRING *cn_data) | |
202 | { | |
203 | char cn[1024]; | |
204 | const char *server = (const char *)check_data; | |
205 | ||
abbd7825 CT |
206 | if (cn_data->length == 0) |
207 | return 1; // zero length cn, ignore | |
208 | ||
209 | if (cn_data->length > (int)sizeof(cn) - 1) | |
4d16918e | 210 | return 1; //if does not fit our buffer just ignore |
abbd7825 | 211 | |
0f7f4cfc AJ |
212 | char *s = reinterpret_cast<char*>(cn_data->data); |
213 | char *d = cn; | |
214 | for (int i = 0; i < cn_data->length; ++i, ++d, ++s) { | |
215 | if (*s == '\0') | |
216 | return 1; // always a domain mismatch. contains 0x00 | |
217 | *d = *s; | |
218 | } | |
4d16918e CT |
219 | cn[cn_data->length] = '\0'; |
220 | debugs(83, 4, "Verifying server domain " << server << " to certificate name/subjectAltName " << cn); | |
abbd7825 | 221 | return matchDomainName(server, (cn[0] == '*' ? cn + 1 : cn), mdnRejectSubsubDomains); |
4d16918e CT |
222 | } |
223 | ||
8eb0a7ee CT |
224 | bool Ssl::checkX509ServerValidity(X509 *cert, const char *server) |
225 | { | |
226 | return matchX509CommonNames(cert, (void *)server, check_domain); | |
227 | } | |
228 | ||
63be0a78 | 229 | /// \ingroup ServerProtocolSSLInternal |
f484cdf5 | 230 | static int |
231 | ssl_verify_cb(int ok, X509_STORE_CTX * ctx) | |
232 | { | |
7698a79c | 233 | // preserve original ctx->error before SSL_ calls can overwrite it |
13cd7dee | 234 | Security::ErrorCode error_no = ok ? SSL_ERROR_NONE : ctx->error; |
7698a79c CT |
235 | |
236 | char buffer[256] = ""; | |
a7ad6e4e | 237 | SSL *ssl = (SSL *)X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx()); |
0476ec45 | 238 | SSL_CTX *sslctx = SSL_get_SSL_CTX(ssl); |
68920ad8 | 239 | SBuf *server = (SBuf *)SSL_get_ex_data(ssl, ssl_ex_index_server); |
a7ad6e4e | 240 | void *dont_verify_domain = SSL_CTX_get_ex_data(sslctx, ssl_ctx_ex_index_dont_verify_domain); |
815eaa44 | 241 | ACLChecklist *check = (ACLChecklist*)SSL_get_ex_data(ssl, ssl_ex_index_cert_error_check); |
e7bcc25f | 242 | X509 *peeked_cert = (X509 *)SSL_get_ex_data(ssl, ssl_ex_index_ssl_peeked_cert); |
92e3827b AJ |
243 | Security::CertPointer peer_cert; |
244 | peer_cert.resetAndLock(ctx->cert); | |
f484cdf5 | 245 | |
92e3827b | 246 | X509_NAME_oneline(X509_get_subject_name(peer_cert.get()), buffer, sizeof(buffer)); |
a7ad6e4e | 247 | |
0ad3ff51 CT |
248 | // detect infinite loops |
249 | uint32_t *validationCounter = static_cast<uint32_t *>(SSL_get_ex_data(ssl, ssl_ex_index_ssl_validation_counter)); | |
250 | if (!validationCounter) { | |
251 | validationCounter = new uint32_t(1); | |
252 | SSL_set_ex_data(ssl, ssl_ex_index_ssl_validation_counter, validationCounter); | |
253 | } else { | |
254 | // overflows allowed if SQUID_CERT_VALIDATION_ITERATION_MAX >= UINT32_MAX | |
255 | (*validationCounter)++; | |
256 | } | |
257 | ||
258 | if ((*validationCounter) >= SQUID_CERT_VALIDATION_ITERATION_MAX) { | |
259 | ok = 0; // or the validation loop will never stop | |
260 | error_no = SQUID_X509_V_ERR_INFINITE_VALIDATION; | |
261 | debugs(83, 2, "SQUID_X509_V_ERR_INFINITE_VALIDATION: " << | |
262 | *validationCounter << " iterations while checking " << buffer); | |
263 | } | |
264 | ||
a7ad6e4e | 265 | if (ok) { |
bf8fe701 | 266 | debugs(83, 5, "SSL Certificate signature OK: " << buffer); |
62e76326 | 267 | |
4747ea4c | 268 | // Check for domain mismatch only if the current certificate is the peer certificate. |
92e3827b AJ |
269 | if (!dont_verify_domain && server && peer_cert.get() == X509_STORE_CTX_get_current_cert(ctx)) { |
270 | if (!Ssl::checkX509ServerValidity(peer_cert.get(), server->c_str())) { | |
815eaa44 | 271 | debugs(83, 2, "SQUID_X509_V_ERR_DOMAIN_MISMATCH: Certificate " << buffer << " does not match domainname " << server); |
62e76326 | 272 | ok = 0; |
4d16918e | 273 | error_no = SQUID_X509_V_ERR_DOMAIN_MISMATCH; |
62e76326 | 274 | } |
275 | } | |
7698a79c | 276 | } |
0db46e4f | 277 | |
e7bcc25f | 278 | if (ok && peeked_cert) { |
7a957a93 | 279 | // Check whether the already peeked certificate matches the new one. |
92e3827b | 280 | if (X509_cmp(peer_cert.get(), peeked_cert) != 0) { |
e7bcc25f CT |
281 | debugs(83, 2, "SQUID_X509_V_ERR_CERT_CHANGE: Certificate " << buffer << " does not match peeked certificate"); |
282 | ok = 0; | |
283 | error_no = SQUID_X509_V_ERR_CERT_CHANGE; | |
284 | } | |
285 | } | |
286 | ||
7698a79c | 287 | if (!ok) { |
92e3827b AJ |
288 | Security::CertPointer broken_cert; |
289 | broken_cert.resetAndLock(X509_STORE_CTX_get_current_cert(ctx)); | |
62a7607e CT |
290 | if (!broken_cert) |
291 | broken_cert = peer_cert; | |
292 | ||
92e3827b | 293 | Security::CertErrors *errs = static_cast<Security::CertErrors *>(SSL_get_ex_data(ssl, ssl_ex_index_ssl_errors)); |
e36bc333 | 294 | const int depth = X509_STORE_CTX_get_error_depth(ctx); |
7a957a93 | 295 | if (!errs) { |
92e3827b | 296 | errs = new Security::CertErrors(Security::CertError(error_no, broken_cert, depth)); |
7a957a93 | 297 | if (!SSL_set_ex_data(ssl, ssl_ex_index_ssl_errors, (void *)errs)) { |
fb2178bb | 298 | debugs(83, 2, "Failed to set ssl error_no in ssl_verify_cb: Certificate " << buffer); |
7a957a93 AR |
299 | delete errs; |
300 | errs = NULL; | |
fb2178bb | 301 | } |
87f237a9 | 302 | } else // remember another error number |
92e3827b | 303 | errs->push_back_unique(Security::CertError(error_no, broken_cert, depth)); |
fb2178bb | 304 | |
7698a79c | 305 | if (const char *err_descr = Ssl::GetErrorDescr(error_no)) |
cf09bec7 CT |
306 | debugs(83, 5, err_descr << ": " << buffer); |
307 | else | |
7698a79c CT |
308 | debugs(83, DBG_IMPORTANT, "SSL unknown certificate error " << error_no << " in " << buffer); |
309 | ||
0ad3ff51 CT |
310 | // Check if the certificate error can be bypassed. |
311 | // Infinity validation loop errors can not bypassed. | |
312 | if (error_no != SQUID_X509_V_ERR_INFINITE_VALIDATION) { | |
313 | if (check) { | |
314 | ACLFilledChecklist *filledCheck = Filled(check); | |
315 | assert(!filledCheck->sslErrors); | |
92e3827b AJ |
316 | filledCheck->sslErrors = new Security::CertErrors(Security::CertError(error_no, broken_cert)); |
317 | filledCheck->serverCert = peer_cert; | |
0ad3ff51 CT |
318 | if (check->fastCheck() == ACCESS_ALLOWED) { |
319 | debugs(83, 3, "bypassing SSL error " << error_no << " in " << buffer); | |
320 | ok = 1; | |
321 | } else { | |
322 | debugs(83, 5, "confirming SSL error " << error_no); | |
323 | } | |
324 | delete filledCheck->sslErrors; | |
325 | filledCheck->sslErrors = NULL; | |
58a5291c | 326 | filledCheck->serverCert.reset(); |
7698a79c | 327 | } |
0ad3ff51 CT |
328 | // If the certificate validator is used then we need to allow all errors and |
329 | // pass them to certficate validator for more processing | |
330 | else if (Ssl::TheConfig.ssl_crt_validator) { | |
7698a79c | 331 | ok = 1; |
7698a79c | 332 | } |
815eaa44 | 333 | } |
a7ad6e4e | 334 | } |
62e76326 | 335 | |
081be7eb CT |
336 | if (Ssl::TheConfig.ssl_crt_validator) { |
337 | // Check if we have stored certificates chain. Store if not. | |
338 | if (!SSL_get_ex_data(ssl, ssl_ex_index_ssl_cert_chain)) { | |
339 | STACK_OF(X509) *certStack = X509_STORE_CTX_get1_chain(ctx); | |
340 | if (certStack && !SSL_set_ex_data(ssl, ssl_ex_index_ssl_cert_chain, certStack)) | |
341 | sk_X509_pop_free(certStack, X509_free); | |
342 | } | |
343 | } | |
344 | ||
7698a79c | 345 | if (!ok && !SSL_get_ex_data(ssl, ssl_ex_index_ssl_error_detail) ) { |
f622c461 MF |
346 | |
347 | // Find the broken certificate. It may be intermediate. | |
92e3827b | 348 | Security::CertPointer broken_cert(peer_cert); // reasonable default if search fails |
f622c461 MF |
349 | // Our SQUID_X509_V_ERR_DOMAIN_MISMATCH implies peer_cert is at fault. |
350 | if (error_no != SQUID_X509_V_ERR_DOMAIN_MISMATCH) { | |
92e3827b AJ |
351 | if (auto *last_used_cert = X509_STORE_CTX_get_current_cert(ctx)) |
352 | broken_cert.resetAndLock(last_used_cert); | |
f622c461 MF |
353 | } |
354 | ||
92e3827b AJ |
355 | auto *errDetail = new Ssl::ErrorDetail(error_no, peer_cert.get(), broken_cert.get()); |
356 | if (!SSL_set_ex_data(ssl, ssl_ex_index_ssl_error_detail, errDetail)) { | |
4d16918e CT |
357 | debugs(83, 2, "Failed to set Ssl::ErrorDetail in ssl_verify_cb: Certificate " << buffer); |
358 | delete errDetail; | |
359 | } | |
360 | } | |
361 | ||
f484cdf5 | 362 | return ok; |
363 | } | |
364 | ||
815eaa44 | 365 | // "dup" function for SSL_get_ex_new_index("cert_err_check") |
366 | static int | |
367 | ssl_dupAclChecklist(CRYPTO_EX_DATA *, CRYPTO_EX_DATA *, void *, | |
26ac0430 AJ |
368 | int, long, void *) |
369 | { | |
815eaa44 | 370 | // We do not support duplication of ACLCheckLists. |
371 | // If duplication is needed, we can count copies with cbdata. | |
372 | assert(false); | |
373 | return 0; | |
374 | } | |
375 | ||
376 | // "free" function for SSL_get_ex_new_index("cert_err_check") | |
377 | static void | |
378 | ssl_freeAclChecklist(void *, void *ptr, CRYPTO_EX_DATA *, | |
26ac0430 AJ |
379 | int, long, void *) |
380 | { | |
815eaa44 | 381 | delete static_cast<ACLChecklist *>(ptr); // may be NULL |
382 | } | |
a7ad6e4e | 383 | |
4d16918e CT |
384 | // "free" function for SSL_get_ex_new_index("ssl_error_detail") |
385 | static void | |
386 | ssl_free_ErrorDetail(void *, void *ptr, CRYPTO_EX_DATA *, | |
387 | int, long, void *) | |
388 | { | |
389 | Ssl::ErrorDetail *errDetail = static_cast <Ssl::ErrorDetail *>(ptr); | |
390 | delete errDetail; | |
391 | } | |
392 | ||
fb2178bb | 393 | static void |
7a957a93 | 394 | ssl_free_SslErrors(void *, void *ptr, CRYPTO_EX_DATA *, |
87f237a9 | 395 | int, long, void *) |
fb2178bb | 396 | { |
92e3827b | 397 | Security::CertErrors *errs = static_cast <Security::CertErrors*>(ptr); |
7a957a93 | 398 | delete errs; |
fb2178bb CT |
399 | } |
400 | ||
0ad3ff51 CT |
401 | // "free" function for SSL_get_ex_new_index("ssl_ex_index_ssl_validation_counter") |
402 | static void | |
403 | ssl_free_int(void *, void *ptr, CRYPTO_EX_DATA *, | |
3cc296c4 | 404 | int, long, void *) |
0ad3ff51 CT |
405 | { |
406 | uint32_t *counter = static_cast <uint32_t *>(ptr); | |
407 | delete counter; | |
408 | } | |
409 | ||
4747ea4c CT |
410 | /// \ingroup ServerProtocolSSLInternal |
411 | /// Callback handler function to release STACK_OF(X509) "ex" data stored | |
412 | /// in an SSL object. | |
413 | static void | |
414 | ssl_free_CertChain(void *, void *ptr, CRYPTO_EX_DATA *, | |
415 | int, long, void *) | |
416 | { | |
417 | STACK_OF(X509) *certsChain = static_cast <STACK_OF(X509) *>(ptr); | |
418 | sk_X509_pop_free(certsChain,X509_free); | |
419 | } | |
420 | ||
e7bcc25f CT |
421 | // "free" function for X509 certificates |
422 | static void | |
423 | ssl_free_X509(void *, void *ptr, CRYPTO_EX_DATA *, | |
87f237a9 | 424 | int, long, void *) |
e7bcc25f CT |
425 | { |
426 | X509 *cert = static_cast <X509 *>(ptr); | |
427 | X509_free(cert); | |
428 | } | |
429 | ||
c1d50c01 | 430 | // "free" function for SBuf |
68920ad8 CT |
431 | static void |
432 | ssl_free_SBuf(void *, void *ptr, CRYPTO_EX_DATA *, | |
433 | int, long, void *) | |
434 | { | |
435 | SBuf *buf = static_cast <SBuf *>(ptr); | |
436 | delete buf; | |
437 | } | |
438 | ||
0a28c16a AJ |
439 | void |
440 | Ssl::Initialize(void) | |
f484cdf5 | 441 | { |
56a35ad1 AR |
442 | static bool initialized = false; |
443 | if (initialized) | |
444 | return; | |
445 | initialized = true; | |
62e76326 | 446 | |
56a35ad1 AR |
447 | SSL_load_error_strings(); |
448 | SSLeay_add_ssl_algorithms(); | |
62e76326 | 449 | |
56a35ad1 | 450 | #if HAVE_OPENSSL_ENGINE_H |
0a28c16a | 451 | if (::Config.SSL.ssl_engine) { |
56a35ad1 | 452 | ENGINE *e; |
0a28c16a AJ |
453 | if (!(e = ENGINE_by_id(::Config.SSL.ssl_engine))) |
454 | fatalf("Unable to find SSL engine '%s'\n", ::Config.SSL.ssl_engine); | |
56a35ad1 AR |
455 | |
456 | if (!ENGINE_set_default(e, ENGINE_METHOD_ALL)) { | |
f5518dca | 457 | const int ssl_error = ERR_get_error(); |
56a35ad1 | 458 | fatalf("Failed to initialise SSL engine: %s\n", ERR_error_string(ssl_error, NULL)); |
62e76326 | 459 | } |
56a35ad1 | 460 | } |
a7ad6e4e | 461 | #else |
0a28c16a | 462 | if (::Config.SSL.ssl_engine) |
56a35ad1 | 463 | fatalf("Your OpenSSL has no SSL engine support\n"); |
a7ad6e4e | 464 | #endif |
62e76326 | 465 | |
0a28c16a | 466 | const char *defName = ::Config.SSL.certSignHash ? ::Config.SSL.certSignHash : SQUID_SSL_SIGN_HASH_IF_NONE; |
3c26b00a CT |
467 | Ssl::DefaultSignHash = EVP_get_digestbyname(defName); |
468 | if (!Ssl::DefaultSignHash) | |
469 | fatalf("Sign hash '%s' is not supported\n", defName); | |
470 | ||
fa1cf51e | 471 | ssl_ex_index_server = SSL_get_ex_new_index(0, (void *) "server", NULL, NULL, ssl_free_SBuf); |
a7ad6e4e | 472 | ssl_ctx_ex_index_dont_verify_domain = SSL_CTX_get_ex_new_index(0, (void *) "dont_verify_domain", NULL, NULL, NULL); |
815eaa44 | 473 | ssl_ex_index_cert_error_check = SSL_get_ex_new_index(0, (void *) "cert_error_check", NULL, &ssl_dupAclChecklist, &ssl_freeAclChecklist); |
4d16918e | 474 | ssl_ex_index_ssl_error_detail = SSL_get_ex_new_index(0, (void *) "ssl_error_detail", NULL, NULL, &ssl_free_ErrorDetail); |
e7bcc25f | 475 | ssl_ex_index_ssl_peeked_cert = SSL_get_ex_new_index(0, (void *) "ssl_peeked_cert", NULL, NULL, &ssl_free_X509); |
7a957a93 | 476 | ssl_ex_index_ssl_errors = SSL_get_ex_new_index(0, (void *) "ssl_errors", NULL, NULL, &ssl_free_SslErrors); |
4747ea4c | 477 | ssl_ex_index_ssl_cert_chain = SSL_get_ex_new_index(0, (void *) "ssl_cert_chain", NULL, NULL, &ssl_free_CertChain); |
0ad3ff51 | 478 | ssl_ex_index_ssl_validation_counter = SSL_get_ex_new_index(0, (void *) "ssl_validation_counter", NULL, NULL, &ssl_free_int); |
55369ae6 AR |
479 | ssl_ex_index_ssl_untrusted_chain = SSL_get_ex_new_index(0, (void *) "ssl_untrusted_chain", NULL, NULL, &ssl_free_CertChain); |
480 | } | |
481 | ||
3834ada4 PM |
482 | #if defined(SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) |
483 | static void | |
484 | ssl_info_cb(const SSL *ssl, int where, int ret) | |
485 | { | |
486 | (void)ret; | |
487 | if ((where & SSL_CB_HANDSHAKE_DONE) != 0) { | |
488 | // disable renegotiation (CVE-2009-3555) | |
489 | ssl->s3->flags |= SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS; | |
490 | } | |
491 | } | |
492 | #endif | |
493 | ||
86660d64 | 494 | static bool |
b23f5f9c | 495 | configureSslContext(Security::ContextPointer &ctx, AnyP::PortCfg &port) |
86660d64 CT |
496 | { |
497 | int ssl_error; | |
b23f5f9c | 498 | SSL_CTX_set_options(ctx.get(), port.secure.parsedOptions); |
f484cdf5 | 499 | |
3834ada4 | 500 | #if defined(SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) |
b23f5f9c | 501 | SSL_CTX_set_info_callback(ctx.get(), ssl_info_cb); |
3834ada4 PM |
502 | #endif |
503 | ||
86660d64 | 504 | if (port.sslContextSessionId) |
b23f5f9c | 505 | SSL_CTX_set_session_id_context(ctx.get(), (const unsigned char *)port.sslContextSessionId, strlen(port.sslContextSessionId)); |
6b2936d5 | 506 | |
9a622f3e | 507 | if (port.secure.parsedFlags & SSL_FLAG_NO_SESSION_REUSE) { |
b23f5f9c | 508 | SSL_CTX_set_session_cache_mode(ctx.get(), SSL_SESS_CACHE_OFF); |
b13877cc | 509 | } |
510 | ||
a9d79803 | 511 | if (Config.SSL.unclean_shutdown) { |
bf8fe701 | 512 | debugs(83, 5, "Enabling quiet SSL shutdowns (RFC violation)."); |
a9d79803 | 513 | |
b23f5f9c | 514 | SSL_CTX_set_quiet_shutdown(ctx.get(), 1); |
a9d79803 | 515 | } |
516 | ||
9a622f3e AJ |
517 | if (!port.secure.sslCipher.isEmpty()) { |
518 | debugs(83, 5, "Using chiper suite " << port.secure.sslCipher << "."); | |
62e76326 | 519 | |
b23f5f9c | 520 | if (!SSL_CTX_set_cipher_list(ctx.get(), port.secure.sslCipher.c_str())) { |
62e76326 | 521 | ssl_error = ERR_get_error(); |
9a622f3e | 522 | debugs(83, DBG_CRITICAL, "ERROR: Failed to set SSL cipher suite '" << port.secure.sslCipher << "': " << ERR_error_string(ssl_error, NULL)); |
86660d64 | 523 | return false; |
62e76326 | 524 | } |
79d4ccdf | 525 | } |
62e76326 | 526 | |
bf8fe701 | 527 | debugs(83, 9, "Setting RSA key generation callback."); |
b23f5f9c | 528 | SSL_CTX_set_tmp_rsa_callback(ctx.get(), ssl_temp_rsa_cb); |
a7ad6e4e | 529 | |
b23f5f9c AJ |
530 | port.secure.updateContextEecdh(ctx); |
531 | port.secure.updateContextCa(ctx); | |
62e76326 | 532 | |
86660d64 | 533 | if (port.clientCA.get()) { |
8c1ff4ef | 534 | ERR_clear_error(); |
e0f4e4e0 | 535 | if (STACK_OF(X509_NAME) *clientca = SSL_dup_CA_list(port.clientCA.get())) { |
b23f5f9c | 536 | SSL_CTX_set_client_CA_list(ctx.get(), clientca); |
e0f4e4e0 AR |
537 | } else { |
538 | ssl_error = ERR_get_error(); | |
539 | debugs(83, DBG_CRITICAL, "ERROR: Failed to dupe the client CA list: " << ERR_error_string(ssl_error, NULL)); | |
540 | return false; | |
541 | } | |
62e76326 | 542 | |
9a622f3e | 543 | if (port.secure.parsedFlags & SSL_FLAG_DELAYED_AUTH) { |
bf8fe701 | 544 | debugs(83, 9, "Not requesting client certificates until acl processing requires one"); |
b23f5f9c | 545 | SSL_CTX_set_verify(ctx.get(), SSL_VERIFY_NONE, NULL); |
62e76326 | 546 | } else { |
bf8fe701 | 547 | debugs(83, 9, "Requiring client certificates."); |
b23f5f9c | 548 | SSL_CTX_set_verify(ctx.get(), SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, ssl_verify_cb); |
62e76326 | 549 | } |
a82a4fe4 | 550 | |
b23f5f9c | 551 | port.secure.updateContextCrl(ctx); |
a82a4fe4 | 552 | |
a7ad6e4e | 553 | } else { |
bf8fe701 | 554 | debugs(83, 9, "Not requiring any client certificates"); |
b23f5f9c | 555 | SSL_CTX_set_verify(ctx.get(), SSL_VERIFY_NONE, NULL); |
a7ad6e4e | 556 | } |
f484cdf5 | 557 | |
9a622f3e | 558 | if (port.secure.parsedFlags & SSL_FLAG_DONT_VERIFY_DOMAIN) |
b23f5f9c | 559 | SSL_CTX_set_ex_data(ctx.get(), ssl_ctx_ex_index_dont_verify_domain, (void *) -1); |
86660d64 | 560 | |
b23f5f9c | 561 | Ssl::SetSessionCallbacks(ctx); |
10a69fc0 | 562 | |
86660d64 CT |
563 | return true; |
564 | } | |
565 | ||
c75aba02 | 566 | bool |
b23f5f9c | 567 | Ssl::InitServerContext(Security::ContextPointer &ctx, AnyP::PortCfg &port) |
86660d64 | 568 | { |
9ad528b8 | 569 | if (!ctx) |
c75aba02 | 570 | return false; |
86660d64 | 571 | |
9ad528b8 | 572 | if (!SSL_CTX_use_certificate(ctx.get(), port.signingCert.get())) { |
f5518dca | 573 | const int ssl_error = ERR_get_error(); |
d1d72d43 AJ |
574 | const auto &keys = port.secure.certs.front(); |
575 | debugs(83, DBG_CRITICAL, "ERROR: Failed to acquire TLS certificate '" << keys.certFile << "': " << ERR_error_string(ssl_error, NULL)); | |
c75aba02 | 576 | return false; |
86660d64 CT |
577 | } |
578 | ||
9ad528b8 | 579 | if (!SSL_CTX_use_PrivateKey(ctx.get(), port.signPkey.get())) { |
f5518dca | 580 | const int ssl_error = ERR_get_error(); |
d1d72d43 AJ |
581 | const auto &keys = port.secure.certs.front(); |
582 | debugs(83, DBG_CRITICAL, "ERROR: Failed to acquire TLS private key '" << keys.privateKeyFile << "': " << ERR_error_string(ssl_error, NULL)); | |
c75aba02 | 583 | return false; |
86660d64 CT |
584 | } |
585 | ||
b23f5f9c | 586 | Ssl::addChainToSslContext(ctx, port.certsToChain.get()); |
86660d64 CT |
587 | |
588 | /* Alternate code; | |
589 | debugs(83, DBG_IMPORTANT, "Using certificate in " << certfile); | |
590 | ||
9ad528b8 | 591 | if (!SSL_CTX_use_certificate_chain_file(ctx.get(), certfile)) { |
86660d64 CT |
592 | ssl_error = ERR_get_error(); |
593 | debugs(83, DBG_CRITICAL, "ERROR: Failed to acquire SSL certificate '" << certfile << "': " << ERR_error_string(ssl_error, NULL)); | |
c75aba02 | 594 | return false; |
35105e4b | 595 | } |
596 | ||
86660d64 | 597 | debugs(83, DBG_IMPORTANT, "Using private key in " << keyfile); |
9ad528b8 | 598 | ssl_ask_password(ctx.get(), keyfile); |
86660d64 | 599 | |
9ad528b8 | 600 | if (!SSL_CTX_use_PrivateKey_file(ctx.get(), keyfile, SSL_FILETYPE_PEM)) { |
86660d64 CT |
601 | ssl_error = ERR_get_error(); |
602 | debugs(83, DBG_CRITICAL, "ERROR: Failed to acquire SSL private key '" << keyfile << "': " << ERR_error_string(ssl_error, NULL)); | |
c75aba02 | 603 | return false; |
35105e4b | 604 | } |
605 | ||
86660d64 | 606 | debugs(83, 5, "Comparing private and public SSL keys."); |
35105e4b | 607 | |
9ad528b8 | 608 | if (!SSL_CTX_check_private_key(ctx.get())) { |
86660d64 CT |
609 | ssl_error = ERR_get_error(); |
610 | debugs(83, DBG_CRITICAL, "ERROR: SSL private key '" << certfile << "' does not match public key '" << | |
611 | keyfile << "': " << ERR_error_string(ssl_error, NULL)); | |
c75aba02 | 612 | return false; |
86660d64 CT |
613 | } |
614 | */ | |
615 | ||
b23f5f9c | 616 | if (!configureSslContext(ctx, port)) { |
86660d64 | 617 | debugs(83, DBG_CRITICAL, "ERROR: Configuring static SSL context"); |
c75aba02 | 618 | return false; |
86660d64 | 619 | } |
62e76326 | 620 | |
c75aba02 | 621 | return true; |
a7ad6e4e | 622 | } |
623 | ||
c75aba02 | 624 | bool |
64769c79 | 625 | Ssl::InitClientContext(Security::ContextPointer &ctx, Security::PeerOptions &peer, long options, long fl) |
d620ae0e | 626 | { |
64769c79 | 627 | if (!ctx) |
c75aba02 | 628 | return false; |
62e76326 | 629 | |
64769c79 | 630 | SSL_CTX_set_options(ctx.get(), options); |
a7ad6e4e | 631 | |
3834ada4 | 632 | #if defined(SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) |
64769c79 | 633 | SSL_CTX_set_info_callback(ctx.get(), ssl_info_cb); |
3834ada4 PM |
634 | #endif |
635 | ||
d1d72d43 AJ |
636 | if (!peer.sslCipher.isEmpty()) { |
637 | debugs(83, 5, "Using chiper suite " << peer.sslCipher << "."); | |
62e76326 | 638 | |
d1d72d43 | 639 | const char *cipher = peer.sslCipher.c_str(); |
64769c79 | 640 | if (!SSL_CTX_set_cipher_list(ctx.get(), cipher)) { |
f5518dca | 641 | const int ssl_error = ERR_get_error(); |
62e76326 | 642 | fatalf("Failed to set SSL cipher suite '%s': %s\n", |
643 | cipher, ERR_error_string(ssl_error, NULL)); | |
644 | } | |
a7ad6e4e | 645 | } |
62e76326 | 646 | |
332c979d AJ |
647 | if (!peer.certs.empty()) { |
648 | // TODO: support loading multiple cert/key pairs | |
649 | auto &keys = peer.certs.front(); | |
650 | if (!keys.certFile.isEmpty()) { | |
651 | debugs(83, DBG_IMPORTANT, "Using certificate in " << keys.certFile); | |
652 | ||
653 | const char *certfile = keys.certFile.c_str(); | |
64769c79 | 654 | if (!SSL_CTX_use_certificate_chain_file(ctx.get(), certfile)) { |
332c979d AJ |
655 | const int ssl_error = ERR_get_error(); |
656 | fatalf("Failed to acquire SSL certificate '%s': %s\n", | |
657 | certfile, ERR_error_string(ssl_error, NULL)); | |
658 | } | |
62e76326 | 659 | |
332c979d AJ |
660 | debugs(83, DBG_IMPORTANT, "Using private key in " << keys.privateKeyFile); |
661 | const char *keyfile = keys.privateKeyFile.c_str(); | |
64769c79 | 662 | ssl_ask_password(ctx.get(), keyfile); |
62e76326 | 663 | |
64769c79 | 664 | if (!SSL_CTX_use_PrivateKey_file(ctx.get(), keyfile, SSL_FILETYPE_PEM)) { |
332c979d AJ |
665 | const int ssl_error = ERR_get_error(); |
666 | fatalf("Failed to acquire SSL private key '%s': %s\n", | |
667 | keyfile, ERR_error_string(ssl_error, NULL)); | |
668 | } | |
62e76326 | 669 | |
332c979d | 670 | debugs(83, 5, "Comparing private and public SSL keys."); |
62e76326 | 671 | |
64769c79 | 672 | if (!SSL_CTX_check_private_key(ctx.get())) { |
332c979d AJ |
673 | const int ssl_error = ERR_get_error(); |
674 | fatalf("SSL private key '%s' does not match public key '%s': %s\n", | |
675 | certfile, keyfile, ERR_error_string(ssl_error, NULL)); | |
676 | } | |
62e76326 | 677 | } |
a7ad6e4e | 678 | } |
62e76326 | 679 | |
bf8fe701 | 680 | debugs(83, 9, "Setting RSA key generation callback."); |
64769c79 | 681 | SSL_CTX_set_tmp_rsa_callback(ctx.get(), ssl_temp_rsa_cb); |
f484cdf5 | 682 | |
a7ad6e4e | 683 | if (fl & SSL_FLAG_DONT_VERIFY_PEER) { |
48e7baac | 684 | debugs(83, 2, "NOTICE: Peer certificates are not verified for validity!"); |
64769c79 | 685 | SSL_CTX_set_verify(ctx.get(), SSL_VERIFY_NONE, NULL); |
a7ad6e4e | 686 | } else { |
bf8fe701 | 687 | debugs(83, 9, "Setting certificate verification callback."); |
64769c79 | 688 | SSL_CTX_set_verify(ctx.get(), SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, ssl_verify_cb); |
a7ad6e4e | 689 | } |
f484cdf5 | 690 | |
c75aba02 | 691 | return true; |
f484cdf5 | 692 | } |
693 | ||
63be0a78 | 694 | /// \ingroup ServerProtocolSSLInternal |
d193a436 | 695 | int |
e6ccf245 | 696 | ssl_read_method(int fd, char *buf, int len) |
f484cdf5 | 697 | { |
33cc0629 | 698 | auto ssl = fd_table[fd].ssl.get(); |
79d4ccdf | 699 | |
6de9e64b | 700 | #if DONT_DO_THIS |
701 | ||
702 | if (!SSL_is_init_finished(ssl)) { | |
703 | errno = ENOTCONN; | |
704 | return -1; | |
705 | } | |
79d4ccdf | 706 | |
6de9e64b | 707 | #endif |
708 | ||
33cc0629 | 709 | int i = SSL_read(ssl, buf, len); |
afc199f9 AR |
710 | if (i > 0) { |
711 | (void)VALGRIND_MAKE_MEM_DEFINED(buf, i); | |
712 | } | |
6de9e64b | 713 | |
714 | if (i > 0 && SSL_pending(ssl) > 0) { | |
bf8fe701 | 715 | debugs(83, 2, "SSL FD " << fd << " is pending"); |
be4d35dc | 716 | fd_table[fd].flags.read_pending = true; |
79d4ccdf | 717 | } else |
be4d35dc | 718 | fd_table[fd].flags.read_pending = false; |
79d4ccdf | 719 | |
720 | return i; | |
f484cdf5 | 721 | } |
722 | ||
63be0a78 | 723 | /// \ingroup ServerProtocolSSLInternal |
d193a436 | 724 | int |
e6ccf245 | 725 | ssl_write_method(int fd, const char *buf, int len) |
f484cdf5 | 726 | { |
33cc0629 | 727 | auto ssl = fd_table[fd].ssl.get(); |
6de9e64b | 728 | if (!SSL_is_init_finished(ssl)) { |
729 | errno = ENOTCONN; | |
730 | return -1; | |
731 | } | |
732 | ||
33cc0629 | 733 | int i = SSL_write(ssl, buf, len); |
6de9e64b | 734 | return i; |
f484cdf5 | 735 | } |
79d4ccdf | 736 | |
737 | void | |
575d05c4 | 738 | ssl_shutdown_method(SSL *ssl) |
79d4ccdf | 739 | { |
79d4ccdf | 740 | SSL_shutdown(ssl); |
741 | } | |
a7ad6e4e | 742 | |
63be0a78 | 743 | /// \ingroup ServerProtocolSSLInternal |
a7ad6e4e | 744 | static const char * |
745 | ssl_get_attribute(X509_NAME * name, const char *attribute_name) | |
746 | { | |
747 | static char buffer[1024]; | |
a7ad6e4e | 748 | buffer[0] = '\0'; |
749 | ||
750 | if (strcmp(attribute_name, "DN") == 0) { | |
62e76326 | 751 | X509_NAME_oneline(name, buffer, sizeof(buffer)); |
627059a5 AJ |
752 | } else { |
753 | int nid = OBJ_txt2nid(const_cast<char *>(attribute_name)); | |
754 | if (nid == 0) { | |
755 | debugs(83, DBG_IMPORTANT, "WARNING: Unknown SSL attribute name '" << attribute_name << "'"); | |
756 | return nullptr; | |
757 | } | |
758 | X509_NAME_get_text_by_NID(name, nid, buffer, sizeof(buffer)); | |
a7ad6e4e | 759 | } |
62e76326 | 760 | |
627059a5 | 761 | return *buffer ? buffer : nullptr; |
a7ad6e4e | 762 | } |
763 | ||
63be0a78 | 764 | /// \ingroup ServerProtocolSSLInternal |
a7ad6e4e | 765 | const char * |
00352183 | 766 | Ssl::GetX509UserAttribute(X509 * cert, const char *attribute_name) |
a7ad6e4e | 767 | { |
a7ad6e4e | 768 | X509_NAME *name; |
23e6c4ae | 769 | const char *ret; |
a7ad6e4e | 770 | |
a7ad6e4e | 771 | if (!cert) |
62e76326 | 772 | return NULL; |
a7ad6e4e | 773 | |
5a4684b6 | 774 | name = X509_get_subject_name(cert); |
a7ad6e4e | 775 | |
23e6c4ae | 776 | ret = ssl_get_attribute(name, attribute_name); |
777 | ||
23e6c4ae | 778 | return ret; |
a7ad6e4e | 779 | } |
780 | ||
00352183 AR |
781 | const char * |
782 | Ssl::GetX509Fingerprint(X509 * cert, const char *) | |
783 | { | |
784 | static char buf[1024]; | |
785 | if (!cert) | |
786 | return NULL; | |
960e100b | 787 | |
00352183 AR |
788 | unsigned int n; |
789 | unsigned char md[EVP_MAX_MD_SIZE]; | |
790 | if (!X509_digest(cert, EVP_sha1(), md, &n)) | |
791 | return NULL; | |
792 | ||
793 | assert(3 * n + 1 < sizeof(buf)); | |
794 | ||
795 | char *s = buf; | |
796 | for (unsigned int i=0; i < n; ++i, s += 3) { | |
797 | const char term = (i + 1 < n) ? ':' : '\0'; | |
798 | snprintf(s, 4, "%02X%c", md[i], term); | |
799 | } | |
800 | ||
801 | return buf; | |
802 | } | |
803 | ||
63be0a78 | 804 | /// \ingroup ServerProtocolSSLInternal |
a7ad6e4e | 805 | const char * |
00352183 | 806 | Ssl::GetX509CAAttribute(X509 * cert, const char *attribute_name) |
a7ad6e4e | 807 | { |
00352183 | 808 | |
a7ad6e4e | 809 | X509_NAME *name; |
23e6c4ae | 810 | const char *ret; |
a7ad6e4e | 811 | |
a7ad6e4e | 812 | if (!cert) |
62e76326 | 813 | return NULL; |
a7ad6e4e | 814 | |
5a4684b6 | 815 | name = X509_get_issuer_name(cert); |
a7ad6e4e | 816 | |
23e6c4ae | 817 | ret = ssl_get_attribute(name, attribute_name); |
818 | ||
00352183 AR |
819 | return ret; |
820 | } | |
821 | ||
822 | const char *sslGetUserAttribute(SSL *ssl, const char *attribute_name) | |
823 | { | |
824 | if (!ssl) | |
825 | return NULL; | |
826 | ||
827 | X509 *cert = SSL_get_peer_certificate(ssl); | |
828 | ||
829 | const char *attr = Ssl::GetX509UserAttribute(cert, attribute_name); | |
830 | ||
23e6c4ae | 831 | X509_free(cert); |
00352183 AR |
832 | return attr; |
833 | } | |
23e6c4ae | 834 | |
00352183 AR |
835 | const char *sslGetCAAttribute(SSL *ssl, const char *attribute_name) |
836 | { | |
837 | if (!ssl) | |
838 | return NULL; | |
839 | ||
840 | X509 *cert = SSL_get_peer_certificate(ssl); | |
841 | ||
842 | const char *attr = Ssl::GetX509CAAttribute(cert, attribute_name); | |
843 | ||
844 | X509_free(cert); | |
845 | return attr; | |
a7ad6e4e | 846 | } |
847 | ||
a7ad6e4e | 848 | const char * |
849 | sslGetUserEmail(SSL * ssl) | |
850 | { | |
e6ceef10 | 851 | return sslGetUserAttribute(ssl, "emailAddress"); |
a7ad6e4e | 852 | } |
4ac9968f | 853 | |
854 | const char * | |
855 | sslGetUserCertificatePEM(SSL *ssl) | |
856 | { | |
857 | X509 *cert; | |
858 | BIO *mem; | |
859 | static char *str = NULL; | |
860 | char *ptr; | |
861 | long len; | |
862 | ||
863 | safe_free(str); | |
864 | ||
865 | if (!ssl) | |
866 | return NULL; | |
867 | ||
868 | cert = SSL_get_peer_certificate(ssl); | |
869 | ||
870 | if (!cert) | |
871 | return NULL; | |
872 | ||
873 | mem = BIO_new(BIO_s_mem()); | |
874 | ||
875 | PEM_write_bio_X509(mem, cert); | |
876 | ||
4ac9968f | 877 | len = BIO_get_mem_data(mem, &ptr); |
878 | ||
879 | str = (char *)xmalloc(len + 1); | |
880 | ||
881 | memcpy(str, ptr, len); | |
882 | ||
883 | str[len] = '\0'; | |
884 | ||
885 | X509_free(cert); | |
886 | ||
887 | BIO_free(mem); | |
888 | ||
889 | return str; | |
890 | } | |
3d61c476 | 891 | |
892 | const char * | |
893 | sslGetUserCertificateChainPEM(SSL *ssl) | |
894 | { | |
895 | STACK_OF(X509) *chain; | |
896 | BIO *mem; | |
897 | static char *str = NULL; | |
898 | char *ptr; | |
899 | long len; | |
900 | int i; | |
901 | ||
902 | safe_free(str); | |
903 | ||
904 | if (!ssl) | |
905 | return NULL; | |
906 | ||
907 | chain = SSL_get_peer_cert_chain(ssl); | |
908 | ||
909 | if (!chain) | |
910 | return sslGetUserCertificatePEM(ssl); | |
911 | ||
912 | mem = BIO_new(BIO_s_mem()); | |
913 | ||
d7ae3534 | 914 | for (i = 0; i < sk_X509_num(chain); ++i) { |
3d61c476 | 915 | X509 *cert = sk_X509_value(chain, i); |
916 | PEM_write_bio_X509(mem, cert); | |
917 | } | |
918 | ||
919 | len = BIO_get_mem_data(mem, &ptr); | |
920 | ||
921 | str = (char *)xmalloc(len + 1); | |
922 | memcpy(str, ptr, len); | |
923 | str[len] = '\0'; | |
924 | ||
925 | BIO_free(mem); | |
926 | ||
927 | return str; | |
928 | } | |
454e8283 | 929 | |
95d2589c | 930 | /// Create SSL context and apply ssl certificate and private key to it. |
0476ec45 | 931 | Security::ContextPointer |
f97700a0 | 932 | Ssl::createSSLContext(Security::CertPointer & x509, Ssl::EVP_PKEY_Pointer & pkey, AnyP::PortCfg &port) |
95d2589c | 933 | { |
0476ec45 | 934 | Security::ContextPointer ctx(port.secure.createBlankContext()); |
95d2589c | 935 | |
0476ec45 AJ |
936 | if (!SSL_CTX_use_certificate(ctx.get(), x509.get())) |
937 | return Security::ContextPointer(); | |
95d2589c | 938 | |
0476ec45 AJ |
939 | if (!SSL_CTX_use_PrivateKey(ctx.get(), pkey.get())) |
940 | return Security::ContextPointer(); | |
86660d64 | 941 | |
b23f5f9c | 942 | if (!configureSslContext(ctx, port)) |
0476ec45 | 943 | return Security::ContextPointer(); |
86660d64 | 944 | |
0476ec45 | 945 | return ctx; |
95d2589c CT |
946 | } |
947 | ||
0476ec45 | 948 | Security::ContextPointer |
86660d64 | 949 | Ssl::generateSslContextUsingPkeyAndCertFromMemory(const char * data, AnyP::PortCfg &port) |
95d2589c | 950 | { |
f97700a0 | 951 | Security::CertPointer cert; |
95d2589c | 952 | Ssl::EVP_PKEY_Pointer pkey; |
96993ee0 | 953 | if (!readCertAndPrivateKeyFromMemory(cert, pkey, data) || !cert || !pkey) |
0476ec45 | 954 | return Security::ContextPointer(); |
95d2589c | 955 | |
86660d64 | 956 | return createSSLContext(cert, pkey, port); |
95d2589c CT |
957 | } |
958 | ||
0476ec45 | 959 | Security::ContextPointer |
86660d64 | 960 | Ssl::generateSslContext(CertificateProperties const &properties, AnyP::PortCfg &port) |
95d2589c | 961 | { |
f97700a0 | 962 | Security::CertPointer cert; |
95d2589c | 963 | Ssl::EVP_PKEY_Pointer pkey; |
96993ee0 | 964 | if (!generateSslCertificate(cert, pkey, properties) || !cert || !pkey) |
0476ec45 | 965 | return Security::ContextPointer(); |
95d2589c | 966 | |
86660d64 | 967 | return createSSLContext(cert, pkey, port); |
95d2589c CT |
968 | } |
969 | ||
d8f0ceab | 970 | void |
b23f5f9c | 971 | Ssl::chainCertificatesToSSLContext(Security::ContextPointer &ctx, AnyP::PortCfg &port) |
d8f0ceab | 972 | { |
b23f5f9c | 973 | assert(ctx); |
d8f0ceab CT |
974 | // Add signing certificate to the certificates chain |
975 | X509 *signingCert = port.signingCert.get(); | |
b23f5f9c | 976 | if (SSL_CTX_add_extra_chain_cert(ctx.get(), signingCert)) { |
d8f0ceab | 977 | // increase the certificate lock |
6f2b8700 | 978 | X509_up_ref(signingCert); |
d8f0ceab CT |
979 | } else { |
980 | const int ssl_error = ERR_get_error(); | |
981 | debugs(33, DBG_IMPORTANT, "WARNING: can not add signing certificate to SSL context chain: " << ERR_error_string(ssl_error, NULL)); | |
982 | } | |
b23f5f9c | 983 | Ssl::addChainToSslContext(ctx, port.certsToChain.get()); |
d8f0ceab CT |
984 | } |
985 | ||
986 | void | |
b23f5f9c | 987 | Ssl::configureUnconfiguredSslContext(Security::ContextPointer &ctx, Ssl::CertSignAlgorithm signAlgorithm,AnyP::PortCfg &port) |
d8f0ceab | 988 | { |
b23f5f9c AJ |
989 | if (ctx && signAlgorithm == Ssl::algSignTrusted) |
990 | Ssl::chainCertificatesToSSLContext(ctx, port); | |
d8f0ceab CT |
991 | } |
992 | ||
d620ae0e CT |
993 | bool |
994 | Ssl::configureSSL(SSL *ssl, CertificateProperties const &properties, AnyP::PortCfg &port) | |
995 | { | |
f97700a0 | 996 | Security::CertPointer cert; |
d620ae0e CT |
997 | Ssl::EVP_PKEY_Pointer pkey; |
998 | if (!generateSslCertificate(cert, pkey, properties)) | |
999 | return false; | |
1000 | ||
1001 | if (!cert) | |
1002 | return false; | |
1003 | ||
1004 | if (!pkey) | |
1005 | return false; | |
1006 | ||
1007 | if (!SSL_use_certificate(ssl, cert.get())) | |
1008 | return false; | |
1009 | ||
1010 | if (!SSL_use_PrivateKey(ssl, pkey.get())) | |
1011 | return false; | |
1012 | ||
1013 | return true; | |
1014 | } | |
1015 | ||
1016 | bool | |
1017 | Ssl::configureSSLUsingPkeyAndCertFromMemory(SSL *ssl, const char *data, AnyP::PortCfg &port) | |
1018 | { | |
f97700a0 | 1019 | Security::CertPointer cert; |
d620ae0e CT |
1020 | Ssl::EVP_PKEY_Pointer pkey; |
1021 | if (!readCertAndPrivateKeyFromMemory(cert, pkey, data)) | |
1022 | return false; | |
1023 | ||
1024 | if (!cert || !pkey) | |
1025 | return false; | |
1026 | ||
1027 | if (!SSL_use_certificate(ssl, cert.get())) | |
1028 | return false; | |
1029 | ||
1030 | if (!SSL_use_PrivateKey(ssl, pkey.get())) | |
1031 | return false; | |
1032 | ||
1033 | return true; | |
1034 | } | |
1035 | ||
b23f5f9c AJ |
1036 | bool |
1037 | Ssl::verifySslCertificate(Security::ContextPointer &ctx, CertificateProperties const &properties) | |
95d2589c | 1038 | { |
b8658552 | 1039 | // SSL_get_certificate is buggy in openssl versions 1.0.1d and 1.0.1e |
b23f5f9c | 1040 | // Try to retrieve certificate directly from Security::ContextPointer object |
fc321c30 | 1041 | #if SQUID_USE_SSLGETCERTIFICATE_HACK |
b23f5f9c | 1042 | X509 ***pCert = (X509 ***)ctx->cert; |
b8658552 | 1043 | X509 * cert = pCert && *pCert ? **pCert : NULL; |
fc321c30 CT |
1044 | #elif SQUID_SSLGETCERTIFICATE_BUGGY |
1045 | X509 * cert = NULL; | |
1046 | assert(0); | |
b8658552 | 1047 | #else |
95d2589c | 1048 | // Temporary ssl for getting X509 certificate from SSL_CTX. |
b23f5f9c | 1049 | Security::SessionPointer ssl(SSL_new(ctx.get())); |
95d2589c | 1050 | X509 * cert = SSL_get_certificate(ssl.get()); |
b8658552 CT |
1051 | #endif |
1052 | if (!cert) | |
1053 | return false; | |
95d2589c CT |
1054 | ASN1_TIME * time_notBefore = X509_get_notBefore(cert); |
1055 | ASN1_TIME * time_notAfter = X509_get_notAfter(cert); | |
1056 | bool ret = (X509_cmp_current_time(time_notBefore) < 0 && X509_cmp_current_time(time_notAfter) > 0); | |
e7bcc25f CT |
1057 | if (!ret) |
1058 | return false; | |
1059 | ||
4ece76b2 | 1060 | return certificateMatchesProperties(cert, properties); |
95d2589c CT |
1061 | } |
1062 | ||
253749a8 CT |
1063 | bool |
1064 | Ssl::setClientSNI(SSL *ssl, const char *fqdn) | |
1065 | { | |
1066 | //The SSL_CTRL_SET_TLSEXT_HOSTNAME is a openssl macro which indicates | |
1067 | // if the TLS servername extension (SNI) is enabled in openssl library. | |
1068 | #if defined(SSL_CTRL_SET_TLSEXT_HOSTNAME) | |
1069 | if (!SSL_set_tlsext_host_name(ssl, fqdn)) { | |
1070 | const int ssl_error = ERR_get_error(); | |
1071 | debugs(83, 3, "WARNING: unable to set TLS servername extension (SNI): " << | |
1072 | ERR_error_string(ssl_error, NULL) << "\n"); | |
1073 | return false; | |
1074 | } | |
1075 | return true; | |
1076 | #else | |
1077 | debugs(83, 7, "no support for TLS servername extension (SNI)\n"); | |
1078 | return false; | |
1079 | #endif | |
1080 | } | |
1081 | ||
b23f5f9c AJ |
1082 | void |
1083 | Ssl::addChainToSslContext(Security::ContextPointer &ctx, STACK_OF(X509) *chain) | |
a594dbfa CT |
1084 | { |
1085 | if (!chain) | |
1086 | return; | |
1087 | ||
d7ae3534 | 1088 | for (int i = 0; i < sk_X509_num(chain); ++i) { |
a594dbfa | 1089 | X509 *cert = sk_X509_value(chain, i); |
b23f5f9c | 1090 | if (SSL_CTX_add_extra_chain_cert(ctx.get(), cert)) { |
a594dbfa | 1091 | // increase the certificate lock |
6f2b8700 | 1092 | X509_up_ref(cert); |
a594dbfa CT |
1093 | } else { |
1094 | const int ssl_error = ERR_get_error(); | |
1095 | debugs(83, DBG_IMPORTANT, "WARNING: can not add certificate to SSL context chain: " << ERR_error_string(ssl_error, NULL)); | |
1096 | } | |
1097 | } | |
1098 | } | |
1099 | ||
55369ae6 AR |
1100 | static const char * |
1101 | hasAuthorityInfoAccessCaIssuers(X509 *cert) | |
1102 | { | |
1103 | AUTHORITY_INFO_ACCESS *info; | |
1104 | if (!cert) | |
168d2b30 | 1105 | return nullptr; |
4b5ea8a6 | 1106 | info = static_cast<AUTHORITY_INFO_ACCESS *>(X509_get_ext_d2i(cert, NID_info_access, NULL, NULL)); |
55369ae6 | 1107 | if (!info) |
168d2b30 | 1108 | return nullptr; |
55369ae6 AR |
1109 | |
1110 | static char uri[MAX_URL]; | |
1111 | uri[0] = '\0'; | |
1112 | ||
1113 | for (int i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) { | |
1114 | ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i); | |
1115 | if (OBJ_obj2nid(ad->method) == NID_ad_ca_issuers) { | |
1116 | if (ad->location->type == GEN_URI) { | |
4b5ea8a6 | 1117 | xstrncpy(uri, reinterpret_cast<char *>(ASN1_STRING_data(ad->location->d.uniformResourceIdentifier)), sizeof(uri)); |
55369ae6 AR |
1118 | } |
1119 | break; | |
1120 | } | |
1121 | } | |
1122 | AUTHORITY_INFO_ACCESS_free(info); | |
168d2b30 | 1123 | return uri[0] != '\0' ? uri : nullptr; |
55369ae6 AR |
1124 | } |
1125 | ||
866be11c CT |
1126 | bool |
1127 | Ssl::loadCerts(const char *certsFile, Ssl::CertsIndexedList &list) | |
1128 | { | |
1129 | BIO *in = BIO_new_file(certsFile, "r"); | |
1130 | if (!in) { | |
1131 | debugs(83, DBG_IMPORTANT, "Failed to open '" << certsFile << "' to load certificates"); | |
1132 | return false; | |
1133 | } | |
1134 | ||
1135 | X509 *aCert; | |
1136 | while((aCert = PEM_read_bio_X509(in, NULL, NULL, NULL))) { | |
1137 | static char buffer[2048]; | |
1138 | X509_NAME_oneline(X509_get_subject_name(aCert), buffer, sizeof(buffer)); | |
1139 | list.insert(std::pair<SBuf, X509 *>(SBuf(buffer), aCert)); | |
1140 | } | |
1141 | debugs(83, 4, "Loaded " << list.size() << " certificates from file: '" << certsFile << "'"); | |
1142 | BIO_free(in); | |
1143 | return true; | |
1144 | } | |
1145 | ||
6c4905ef CT |
1146 | /// quickly find the issuer certificate of a certificate cert in the |
1147 | /// Ssl::CertsIndexedList list | |
55369ae6 | 1148 | static X509 * |
6c4905ef | 1149 | findCertIssuerFast(Ssl::CertsIndexedList &list, X509 *cert) |
55369ae6 AR |
1150 | { |
1151 | static char buffer[2048]; | |
1152 | ||
1153 | if (X509_NAME *issuerName = X509_get_issuer_name(cert)) | |
1154 | X509_NAME_oneline(issuerName, buffer, sizeof(buffer)); | |
1155 | else | |
1156 | return NULL; | |
1157 | ||
1158 | const auto ret = list.equal_range(SBuf(buffer)); | |
1159 | for (Ssl::CertsIndexedList::iterator it = ret.first; it != ret.second; ++it) { | |
1160 | X509 *issuer = it->second; | |
1161 | if (X509_check_issued(cert, issuer)) { | |
1162 | return issuer; | |
1163 | } | |
1164 | } | |
1165 | return NULL; | |
1166 | } | |
1167 | ||
6c4905ef | 1168 | /// slowly find the issuer certificate of a given cert using linear search |
a34d1d2d CT |
1169 | static bool |
1170 | findCertIssuer(Security::CertList const &list, X509 *cert) | |
55369ae6 | 1171 | { |
a34d1d2d CT |
1172 | for (Security::CertList::const_iterator it = list.begin(); it != list.end(); ++it) { |
1173 | if (X509_check_issued(it->get(), cert) == X509_V_OK) | |
1174 | return true; | |
55369ae6 | 1175 | } |
a34d1d2d | 1176 | return false; |
55369ae6 AR |
1177 | } |
1178 | ||
1179 | const char * | |
a34d1d2d | 1180 | Ssl::uriOfIssuerIfMissing(X509 *cert, Security::CertList const &serverCertificates) |
55369ae6 | 1181 | { |
a34d1d2d | 1182 | if (!cert || !serverCertificates.size()) |
168d2b30 | 1183 | return nullptr; |
55369ae6 | 1184 | |
a34d1d2d | 1185 | if (!findCertIssuer(serverCertificates, cert)) { |
168d2b30 | 1186 | //if issuer is missing |
6c4905ef | 1187 | if (!findCertIssuerFast(SquidUntrustedCerts, cert)) { |
3945c91d | 1188 | // and issuer not found in local untrusted certificates database |
55369ae6 AR |
1189 | if (const char *issuerUri = hasAuthorityInfoAccessCaIssuers(cert)) { |
1190 | // There is a URI where we can download a certificate. | |
55369ae6 AR |
1191 | return issuerUri; |
1192 | } | |
1193 | } | |
1194 | } | |
168d2b30 | 1195 | return nullptr; |
55369ae6 AR |
1196 | } |
1197 | ||
1198 | void | |
a34d1d2d | 1199 | Ssl::missingChainCertificatesUrls(std::queue<SBuf> &URIs, Security::CertList const &serverCertificates) |
55369ae6 | 1200 | { |
a34d1d2d | 1201 | if (!serverCertificates.size()) |
55369ae6 AR |
1202 | return; |
1203 | ||
4b5ea8a6 CT |
1204 | for (const auto &i : serverCertificates) { |
1205 | if (const char *issuerUri = uriOfIssuerIfMissing(i.get(), serverCertificates)) | |
55369ae6 AR |
1206 | URIs.push(SBuf(issuerUri)); |
1207 | } | |
1208 | } | |
1209 | ||
1210 | void | |
1211 | Ssl::SSL_add_untrusted_cert(SSL *ssl, X509 *cert) | |
1212 | { | |
1213 | STACK_OF(X509) *untrustedStack = static_cast <STACK_OF(X509) *>(SSL_get_ex_data(ssl, ssl_ex_index_ssl_untrusted_chain)); | |
1214 | if (!untrustedStack) { | |
1215 | untrustedStack = sk_X509_new_null(); | |
1216 | if (!SSL_set_ex_data(ssl, ssl_ex_index_ssl_untrusted_chain, untrustedStack)) { | |
168d2b30 CT |
1217 | sk_X509_pop_free(untrustedStack, X509_free); |
1218 | throw TextException("Failed to attach untrusted certificates chain"); | |
55369ae6 AR |
1219 | } |
1220 | } | |
1221 | sk_X509_push(untrustedStack, cert); | |
1222 | } | |
1223 | ||
6c4905ef | 1224 | /// Search for the issuer certificate of cert in sk list. |
a34d1d2d | 1225 | static X509 * |
6c4905ef | 1226 | sk_x509_findIssuer(STACK_OF(X509) *sk, X509 *cert) |
a34d1d2d CT |
1227 | { |
1228 | if (!sk) | |
1229 | return NULL; | |
1230 | ||
1231 | const int skItemsNum = sk_X509_num(sk); | |
1232 | for (int i = 0; i < skItemsNum; ++i) { | |
1233 | X509 *issuer = sk_X509_value(sk, i); | |
1234 | if (X509_check_issued(issuer, cert) == X509_V_OK) | |
1235 | return issuer; | |
1236 | } | |
1237 | return NULL; | |
1238 | } | |
1239 | ||
55369ae6 AR |
1240 | /// add missing issuer certificates to untrustedCerts |
1241 | static void | |
1242 | completeIssuers(X509_STORE_CTX *ctx, STACK_OF(X509) *untrustedCerts) | |
1243 | { | |
1244 | debugs(83, 2, "completing " << sk_X509_num(untrustedCerts) << " OpenSSL untrusted certs using " << SquidUntrustedCerts.size() << " configured untrusted certificates"); | |
1245 | ||
1246 | int depth = ctx->param->depth; | |
1247 | X509 *current = ctx->cert; | |
1248 | int i = 0; | |
1249 | for (i = 0; current && (i < depth); ++i) { | |
1250 | if (X509_check_issued(current, current)) { | |
1251 | // either ctx->cert is itself self-signed or untrustedCerts | |
1252 | // aready contain the self-signed current certificate | |
1253 | break; | |
1254 | } | |
1255 | ||
1256 | // untrustedCerts is short, not worth indexing | |
6c4905ef | 1257 | X509 *issuer = sk_x509_findIssuer(untrustedCerts, current); |
55369ae6 | 1258 | if (!issuer) { |
6c4905ef | 1259 | if ((issuer = findCertIssuerFast(SquidUntrustedCerts, current))) |
55369ae6 AR |
1260 | sk_X509_push(untrustedCerts, issuer); |
1261 | } | |
1262 | current = issuer; | |
1263 | } | |
1264 | ||
1265 | if (i >= depth) | |
1266 | debugs(83, 2, "exceeded the maximum certificate chain length: " << depth); | |
1267 | } | |
1268 | ||
1269 | /// OpenSSL certificate validation callback. | |
1270 | static int | |
1271 | untrustedToStoreCtx_cb(X509_STORE_CTX *ctx,void *data) | |
1272 | { | |
1273 | debugs(83, 4, "Try to use pre-downloaded intermediate certificates\n"); | |
1274 | ||
4b5ea8a6 | 1275 | SSL *ssl = static_cast<SSL *>(X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx())); |
55369ae6 AR |
1276 | STACK_OF(X509) *sslUntrustedStack = static_cast <STACK_OF(X509) *>(SSL_get_ex_data(ssl, ssl_ex_index_ssl_untrusted_chain)); |
1277 | ||
1278 | // OpenSSL already maintains ctx->untrusted but we cannot modify | |
1279 | // internal OpenSSL list directly. We have to give OpenSSL our own | |
1280 | // list, but it must include certificates on the OpenSSL ctx->untrusted | |
1281 | STACK_OF(X509) *oldUntrusted = ctx->untrusted; | |
1282 | STACK_OF(X509) *sk = sk_X509_dup(oldUntrusted); // oldUntrusted is always not NULL | |
1283 | ||
1284 | for (int i = 0; i < sk_X509_num(sslUntrustedStack); ++i) { | |
1285 | X509 *cert = sk_X509_value(sslUntrustedStack, i); | |
1286 | sk_X509_push(sk, cert); | |
1287 | } | |
1288 | ||
1289 | // If the local untrusted certificates internal database is used | |
1290 | // run completeIssuers to add missing certificates if possible. | |
1291 | if (SquidUntrustedCerts.size() > 0) | |
1292 | completeIssuers(ctx, sk); | |
1293 | ||
1294 | X509_STORE_CTX_set_chain(ctx, sk); // No locking/unlocking, just sets ctx->untrusted | |
1295 | int ret = X509_verify_cert(ctx); | |
1296 | X509_STORE_CTX_set_chain(ctx, oldUntrusted); // Set back the old untrusted list | |
1297 | sk_X509_free(sk); // Release sk list | |
1298 | return ret; | |
1299 | } | |
1300 | ||
1301 | void | |
1302 | Ssl::useSquidUntrusted(SSL_CTX *sslContext) | |
1303 | { | |
1304 | SSL_CTX_set_cert_verify_callback(sslContext, untrustedToStoreCtx_cb, NULL); | |
1305 | } | |
1306 | ||
1307 | bool | |
1308 | Ssl::loadSquidUntrusted(const char *path) | |
1309 | { | |
1310 | return Ssl::loadCerts(path, SquidUntrustedCerts); | |
1311 | } | |
1312 | ||
1313 | void | |
1314 | Ssl::unloadSquidUntrusted() | |
1315 | { | |
1316 | if (SquidUntrustedCerts.size()) { | |
1317 | for (Ssl::CertsIndexedList::iterator it = SquidUntrustedCerts.begin(); it != SquidUntrustedCerts.end(); ++it) { | |
1318 | X509_free(it->second); | |
1319 | } | |
1320 | SquidUntrustedCerts.clear(); | |
1321 | } | |
1322 | } | |
1323 | ||
a594dbfa CT |
1324 | /** |
1325 | \ingroup ServerProtocolSSLInternal | |
1326 | * Read certificate from file. | |
1327 | * See also: static readSslX509Certificate function, gadgets.cc file | |
1328 | */ | |
1329 | static X509 * readSslX509CertificatesChain(char const * certFilename, STACK_OF(X509)* chain) | |
1330 | { | |
1331 | if (!certFilename) | |
1332 | return NULL; | |
1333 | Ssl::BIO_Pointer bio(BIO_new(BIO_s_file_internal())); | |
1334 | if (!bio) | |
1335 | return NULL; | |
1336 | if (!BIO_read_filename(bio.get(), certFilename)) | |
1337 | return NULL; | |
1338 | X509 *certificate = PEM_read_bio_X509(bio.get(), NULL, NULL, NULL); | |
1339 | ||
1340 | if (certificate && chain) { | |
1341 | ||
c11211d9 | 1342 | if (X509_check_issued(certificate, certificate) == X509_V_OK) |
a594dbfa CT |
1343 | debugs(83, 5, "Certificate is self-signed, will not be chained"); |
1344 | else { | |
a411d213 | 1345 | // and add to the chain any other certificate exist in the file |
a594dbfa CT |
1346 | while (X509 *ca = PEM_read_bio_X509(bio.get(), NULL, NULL, NULL)) { |
1347 | if (!sk_X509_push(chain, ca)) | |
1348 | debugs(83, DBG_IMPORTANT, "WARNING: unable to add CA certificate to cert chain"); | |
1349 | } | |
1350 | } | |
1351 | } | |
c11211d9 | 1352 | |
a594dbfa CT |
1353 | return certificate; |
1354 | } | |
1355 | ||
f97700a0 | 1356 | void Ssl::readCertChainAndPrivateKeyFromFiles(Security::CertPointer & cert, EVP_PKEY_Pointer & pkey, X509_STACK_Pointer & chain, char const * certFilename, char const * keyFilename) |
a594dbfa CT |
1357 | { |
1358 | if (keyFilename == NULL) | |
1359 | keyFilename = certFilename; | |
86660d64 CT |
1360 | |
1361 | if (certFilename == NULL) | |
1362 | certFilename = keyFilename; | |
1363 | ||
1364 | debugs(83, DBG_IMPORTANT, "Using certificate in " << certFilename); | |
1365 | ||
a594dbfa CT |
1366 | if (!chain) |
1367 | chain.reset(sk_X509_new_null()); | |
1368 | if (!chain) | |
1369 | debugs(83, DBG_IMPORTANT, "WARNING: unable to allocate memory for cert chain"); | |
37144aca AR |
1370 | // XXX: ssl_ask_password_cb needs SSL_CTX_set_default_passwd_cb_userdata() |
1371 | // so this may not fully work iff Config.Program.ssl_password is set. | |
1372 | pem_password_cb *cb = ::Config.Program.ssl_password ? &ssl_ask_password_cb : NULL; | |
35b3559c AJ |
1373 | pkey.resetWithoutLocking(readSslPrivateKey(keyFilename, cb)); |
1374 | cert.resetWithoutLocking(readSslX509CertificatesChain(certFilename, chain.get())); | |
599111be AJ |
1375 | if (!cert) { |
1376 | debugs(83, DBG_IMPORTANT, "WARNING: missing cert in '" << certFilename << "'"); | |
1377 | } else if (!pkey) { | |
1378 | debugs(83, DBG_IMPORTANT, "WARNING: missing private key in '" << keyFilename << "'"); | |
1379 | } else if (!X509_check_private_key(cert.get(), pkey.get())) { | |
1380 | debugs(83, DBG_IMPORTANT, "WARNING: X509_check_private_key() failed to verify signing cert"); | |
1381 | } else | |
1382 | return; // everything is okay | |
1383 | ||
1384 | pkey.reset(); | |
1385 | cert.reset(); | |
a594dbfa CT |
1386 | } |
1387 | ||
f97700a0 | 1388 | bool Ssl::generateUntrustedCert(Security::CertPointer &untrustedCert, EVP_PKEY_Pointer &untrustedPkey, Security::CertPointer const &cert, EVP_PKEY_Pointer const & pkey) |
95588170 CT |
1389 | { |
1390 | // Generate the self-signed certificate, using a hard-coded subject prefix | |
1391 | Ssl::CertificateProperties certProperties; | |
1392 | if (const char *cn = CommonHostName(cert.get())) { | |
1393 | certProperties.commonName = "Not trusted by \""; | |
1394 | certProperties.commonName += cn; | |
1395 | certProperties.commonName += "\""; | |
87f237a9 | 1396 | } else if (const char *org = getOrganization(cert.get())) { |
95588170 CT |
1397 | certProperties.commonName = "Not trusted by \""; |
1398 | certProperties.commonName += org; | |
1399 | certProperties.commonName += "\""; | |
87f237a9 | 1400 | } else |
95588170 CT |
1401 | certProperties.commonName = "Not trusted"; |
1402 | certProperties.setCommonName = true; | |
1403 | // O, OU, and other CA subject fields will be mimicked | |
1404 | // Expiration date and other common properties will be mimicked | |
1405 | certProperties.signAlgorithm = Ssl::algSignSelf; | |
1406 | certProperties.signWithPkey.resetAndLock(pkey.get()); | |
1407 | certProperties.mimicCert.resetAndLock(cert.get()); | |
1408 | return Ssl::generateSslCertificate(untrustedCert, untrustedPkey, certProperties); | |
1409 | } | |
1410 | ||
157c5ace | 1411 | static bool |
b23f5f9c | 1412 | SslCreate(const Security::ContextPointer &ctx, const Comm::ConnectionPointer &conn, Ssl::Bio::Type type, const char *squidCtx) |
b3a8ae1b | 1413 | { |
157c5ace | 1414 | if (!Comm::IsConnOpen(conn)) { |
b418d9c8 | 1415 | debugs(83, DBG_IMPORTANT, "Gone connection"); |
157c5ace | 1416 | return false; |
b418d9c8 CT |
1417 | } |
1418 | ||
b3a8ae1b AR |
1419 | const char *errAction = NULL; |
1420 | int errCode = 0; | |
b23f5f9c | 1421 | if (auto ssl = SSL_new(ctx.get())) { |
157c5ace | 1422 | const int fd = conn->fd; |
b3a8ae1b | 1423 | // without BIO, we would call SSL_set_fd(ssl, fd) instead |
d620ae0e | 1424 | if (BIO *bio = Ssl::Bio::Create(fd, type)) { |
b3a8ae1b AR |
1425 | Ssl::Bio::Link(ssl, bio); // cannot fail |
1426 | ||
35b3559c | 1427 | fd_table[fd].ssl.resetWithoutLocking(ssl); |
b3a8ae1b AR |
1428 | fd_table[fd].read_method = &ssl_read_method; |
1429 | fd_table[fd].write_method = &ssl_write_method; | |
1430 | fd_note(fd, squidCtx); | |
157c5ace | 1431 | return true; |
b3a8ae1b AR |
1432 | } |
1433 | errCode = ERR_get_error(); | |
1434 | errAction = "failed to initialize I/O"; | |
1435 | SSL_free(ssl); | |
1436 | } else { | |
1437 | errCode = ERR_get_error(); | |
1438 | errAction = "failed to allocate handle"; | |
1439 | } | |
1440 | ||
1441 | debugs(83, DBG_IMPORTANT, "ERROR: " << squidCtx << ' ' << errAction << | |
1442 | ": " << ERR_error_string(errCode, NULL)); | |
157c5ace | 1443 | return false; |
b3a8ae1b AR |
1444 | } |
1445 | ||
157c5ace | 1446 | bool |
b23f5f9c | 1447 | Ssl::CreateClient(const Security::ContextPointer &ctx, const Comm::ConnectionPointer &c, const char *squidCtx) |
d620ae0e | 1448 | { |
b23f5f9c | 1449 | return SslCreate(ctx, c, Ssl::Bio::BIO_TO_SERVER, squidCtx); |
d620ae0e CT |
1450 | } |
1451 | ||
157c5ace | 1452 | bool |
0476ec45 | 1453 | Ssl::CreateServer(const Security::ContextPointer &ctx, const Comm::ConnectionPointer &c, const char *squidCtx) |
d620ae0e | 1454 | { |
b23f5f9c | 1455 | return SslCreate(ctx, c, Ssl::Bio::BIO_TO_CLIENT, squidCtx); |
d620ae0e CT |
1456 | } |
1457 | ||
10a69fc0 CT |
1458 | static int |
1459 | store_session_cb(SSL *ssl, SSL_SESSION *session) | |
1460 | { | |
824d4656 | 1461 | if (!Ssl::SessionCache) |
10a69fc0 CT |
1462 | return 0; |
1463 | ||
1464 | debugs(83, 5, "Request to store SSL Session "); | |
1465 | ||
1466 | SSL_SESSION_set_timeout(session, Config.SSL.session_ttl); | |
1467 | ||
1468 | unsigned char *id = session->session_id; | |
1469 | unsigned int idlen = session->session_id_length; | |
1470 | unsigned char key[MEMMAP_SLOT_KEY_SIZE]; | |
1471 | // Session ids are of size 32bytes. They should always fit to a | |
86c63190 | 1472 | // MemMap::Slot::key |
10a69fc0 CT |
1473 | assert(idlen <= MEMMAP_SLOT_KEY_SIZE); |
1474 | memset(key, 0, sizeof(key)); | |
1475 | memcpy(key, id, idlen); | |
1476 | int pos; | |
824d4656 | 1477 | Ipc::MemMap::Slot *slotW = Ssl::SessionCache->openForWriting((const cache_key*)key, pos); |
10a69fc0 CT |
1478 | if (slotW) { |
1479 | int lenRequired = i2d_SSL_SESSION(session, NULL); | |
1480 | if (lenRequired < MEMMAP_SLOT_DATA_SIZE) { | |
1481 | unsigned char *p = (unsigned char *)slotW->p; | |
1482 | lenRequired = i2d_SSL_SESSION(session, &p); | |
1483 | slotW->set(key, NULL, lenRequired, squid_curtime + Config.SSL.session_ttl); | |
1484 | } | |
824d4656 | 1485 | Ssl::SessionCache->closeForWriting(pos); |
10a69fc0 CT |
1486 | debugs(83, 5, "wrote an ssl session entry of size " << lenRequired << " at pos " << pos); |
1487 | } | |
1488 | return 0; | |
1489 | } | |
1490 | ||
1491 | static void | |
1492 | remove_session_cb(SSL_CTX *, SSL_SESSION *sessionID) | |
1493 | { | |
824d4656 | 1494 | if (!Ssl::SessionCache) |
10a69fc0 CT |
1495 | return ; |
1496 | ||
1497 | debugs(83, 5, "Request to remove corrupted or not valid SSL Session "); | |
1498 | int pos; | |
824d4656 | 1499 | Ipc::MemMap::Slot const *slot = Ssl::SessionCache->openForReading((const cache_key*)sessionID, pos); |
10a69fc0 CT |
1500 | if (slot == NULL) |
1501 | return; | |
824d4656 | 1502 | Ssl::SessionCache->closeForReading(pos); |
10a69fc0 CT |
1503 | // TODO: |
1504 | // What if we are not able to remove the session? | |
1505 | // Maybe schedule a job to remove it later? | |
1506 | // For now we just have an invalid entry in cache until will be expired | |
1507 | // The openSSL will reject it when we try to use it | |
824d4656 | 1508 | Ssl::SessionCache->free(pos); |
10a69fc0 CT |
1509 | } |
1510 | ||
1511 | static SSL_SESSION * | |
1512 | get_session_cb(SSL *, unsigned char *sessionID, int len, int *copy) | |
1513 | { | |
824d4656 | 1514 | if (!Ssl::SessionCache) |
10a69fc0 CT |
1515 | return NULL; |
1516 | ||
1517 | SSL_SESSION *session = NULL; | |
1518 | const unsigned int *p; | |
1519 | p = (unsigned int *)sessionID; | |
1520 | debugs(83, 5, "Request to search for SSL Session of len:" << | |
1521 | len << p[0] << ":" << p[1]); | |
1522 | ||
1523 | int pos; | |
824d4656 | 1524 | Ipc::MemMap::Slot const *slot = Ssl::SessionCache->openForReading((const cache_key*)sessionID, pos); |
10a69fc0 CT |
1525 | if (slot != NULL) { |
1526 | if (slot->expire > squid_curtime) { | |
1527 | const unsigned char *ptr = slot->p; | |
1528 | session = d2i_SSL_SESSION(NULL, &ptr, slot->pSize); | |
1529 | debugs(83, 5, "Session retrieved from cache at pos " << pos); | |
1530 | } else | |
1531 | debugs(83, 5, "Session in cache expired"); | |
824d4656 | 1532 | Ssl::SessionCache->closeForReading(pos); |
10a69fc0 CT |
1533 | } |
1534 | ||
1535 | if (!session) | |
1536 | debugs(83, 5, "Failed to retrieved from cache\n"); | |
1537 | ||
1538 | // With the parameter copy the callback can require the SSL engine | |
1539 | // to increment the reference count of the SSL_SESSION object, Normally | |
1540 | // the reference count is not incremented and therefore the session must | |
1541 | // not be explicitly freed with SSL_SESSION_free(3). | |
1542 | *copy = 0; | |
1543 | return session; | |
1544 | } | |
1545 | ||
824d4656 | 1546 | void |
b23f5f9c | 1547 | Ssl::SetSessionCallbacks(Security::ContextPointer &ctx) |
10a69fc0 | 1548 | { |
824d4656 | 1549 | if (Ssl::SessionCache) { |
b23f5f9c AJ |
1550 | SSL_CTX_set_session_cache_mode(ctx.get(), SSL_SESS_CACHE_SERVER|SSL_SESS_CACHE_NO_INTERNAL); |
1551 | SSL_CTX_sess_set_new_cb(ctx.get(), store_session_cb); | |
1552 | SSL_CTX_sess_set_remove_cb(ctx.get(), remove_session_cb); | |
1553 | SSL_CTX_sess_set_get_cb(ctx.get(), get_session_cb); | |
10a69fc0 CT |
1554 | } |
1555 | } | |
1556 | ||
cb4f4424 | 1557 | #endif /* USE_OPENSSL */ |
f53969cc | 1558 |