1 /*********************************************************************
3 * File : $Source: /cvsroot/ijbswa/current/openssl.c,v $
5 * Purpose : File with TLS/SSL extension. Contains methods for
6 * creating, using and closing TLS/SSL connections.
8 * Copyright : Written by and Copyright (c) 2020 Maxim Antonov <mantonov@gmail.com>
9 * Copyright (C) 2017 Vaclav Svec. FIT CVUT.
10 * Copyright (C) 2018-2020 by Fabian Keil <fk@fabiankeil.de>
12 * This program is free software; you can redistribute it
13 * and/or modify it under the terms of the GNU General
14 * Public License as published by the Free Software
15 * Foundation; either version 2 of the License, or (at
16 * your option) any later version.
18 * This program is distributed in the hope that it will
19 * be useful, but WITHOUT ANY WARRANTY; without even the
20 * implied warranty of MERCHANTABILITY or FITNESS FOR A
21 * PARTICULAR PURPOSE. See the GNU General Public
22 * License for more details.
24 * The GNU General Public License should be included with
25 * this file. If not, you can view it at
26 * http://www.gnu.org/copyleft/gpl.html
27 * or write to the Free Software Foundation, Inc., 59
28 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 *********************************************************************/
35 #include <openssl/bn.h>
36 #include <openssl/opensslv.h>
37 #include <openssl/pem.h>
38 #include <openssl/md5.h>
39 #include <openssl/x509v3.h>
48 #include "ssl_common.h"
51 * Macros for openssl.c
53 #define CERTIFICATE_BASIC_CONSTRAINTS "CA:FALSE"
54 #define CERTIFICATE_SUBJECT_KEY "hash"
55 #define CERTIFICATE_AUTHORITY_KEY "keyid:always"
56 #define CERTIFICATE_ALT_NAME_PREFIX "DNS:"
57 #define CERTIFICATE_VERSION 2
58 #define VALID_DATETIME_FMT "%y%m%d%H%M%SZ"
59 #define VALID_DATETIME_BUFLEN 16
61 static int generate_webpage_certificate(struct client_state *csp);
62 static void free_client_ssl_structures(struct client_state *csp);
63 static void free_server_ssl_structures(struct client_state *csp);
64 static int ssl_store_cert(struct client_state *csp, X509* crt);
65 static void log_ssl_errors(int debuglevel, const char* fmt, ...) __attribute__((format(printf, 2, 3)));
67 static int ssl_inited = 0;
69 #if OPENSSL_VERSION_NUMBER < 0x10100000L
70 #define X509_set1_notBefore X509_set_notBefore
71 #define X509_set1_notAfter X509_set_notAfter
72 #define X509_get0_serialNumber X509_get_serialNumber
73 #define X509_get0_notBefore X509_get_notBefore
74 #define X509_get0_notAfter X509_get_notAfter
77 /*********************************************************************
79 * Function : openssl_init
81 * Description : Initializes OpenSSL library once
87 *********************************************************************/
88 static void openssl_init(void)
92 privoxy_mutex_lock(&ssl_init_mutex);
95 #if OPENSSL_VERSION_NUMBER < 0x10100000L
98 OPENSSL_init_ssl(0, NULL);
100 SSL_load_error_strings();
101 OpenSSL_add_ssl_algorithms();
104 privoxy_mutex_unlock(&ssl_init_mutex);
109 /*********************************************************************
111 * Function : is_ssl_pending
113 * Description : Tests if there are some waiting data on ssl connection.
114 * Only considers data that has actually been received
115 * locally and ignores data that is still on the fly
116 * or has not yet been sent by the remote end.
119 * 1 : ssl_attr = SSL context to test
121 * Returns : 0 => No data are pending
122 * >0 => Pending data length
124 *********************************************************************/
125 extern size_t is_ssl_pending(struct ssl_attr *ssl_attr)
127 BIO *bio = ssl_attr->openssl_attr.bio;
133 return (size_t)BIO_pending(bio);
137 /*********************************************************************
139 * Function : ssl_send_data
141 * Description : Sends the content of buf (for n bytes) to given SSL
142 * connection context.
145 * 1 : ssl_attr = SSL context to send data to
146 * 2 : buf = Pointer to data to be sent
147 * 3 : len = Length of data to be sent to the SSL context
149 * Returns : Length of sent data or negative value on error.
151 *********************************************************************/
152 extern int ssl_send_data(struct ssl_attr *ssl_attr, const unsigned char *buf, size_t len)
154 BIO *bio = ssl_attr->openssl_attr.bio;
157 int pos = 0; /* Position of unsent part in buffer */
165 if (BIO_get_ssl(bio, &ssl) == 1)
167 fd = SSL_get_fd(ssl);
172 int send_len = (int)len - pos;
174 log_error(LOG_LEVEL_WRITING, "TLS on socket %d: %N",
175 fd, send_len, buf+pos);
178 * Sending one part of the buffer
180 while ((ret = BIO_write(bio,
181 (const unsigned char *)(buf + pos),
184 if (!BIO_should_retry(bio))
186 log_ssl_errors(LOG_LEVEL_ERROR,
187 "Sending data on socket %d over TLS/SSL failed", fd);
191 /* Adding count of sent bytes to position in buffer */
199 /*********************************************************************
201 * Function : ssl_recv_data
203 * Description : Receives data from given SSL context and puts
207 * 1 : ssl_attr = SSL context to receive data from
208 * 2 : buf = Pointer to buffer where data will be written
209 * 3 : max_length = Maximum number of bytes to read
211 * Returns : Number of bytes read, 0 for EOF, or -1
214 *********************************************************************/
215 extern int ssl_recv_data(struct ssl_attr *ssl_attr, unsigned char *buf, size_t max_length)
217 BIO *bio = ssl_attr->openssl_attr.bio;
222 memset(buf, 0, max_length);
225 * Receiving data from SSL context into buffer
229 ret = BIO_read(bio, buf, (int)max_length);
230 } while (ret <= 0 && BIO_should_retry(bio));
234 log_ssl_errors(LOG_LEVEL_ERROR,
235 "Receiving data on socket %d over TLS/SSL failed", fd);
240 if (BIO_get_ssl(bio, &ssl) == 1)
242 fd = SSL_get_fd(ssl);
245 log_error(LOG_LEVEL_RECEIVED, "TLS from socket %d: %N",
252 /*********************************************************************
254 * Function : ssl_store_cert
256 * Description : This function is called once for each certificate in the
257 * server's certificate trusted chain and prepares
258 * information about the certificate. The information can
259 * be used to inform the user about invalid certificates.
262 * 1 : csp = Current client state (buffers, headers, etc...)
263 * 2 : crt = certificate from trusted chain
265 * Returns : 0 on success and negative value on error
267 *********************************************************************/
268 static int ssl_store_cert(struct client_state *csp, X509* crt)
271 struct certs_chain *last = &(csp->server_certs_chain);
273 BIO *bio = BIO_new(BIO_s_mem());
274 EVP_PKEY *pkey = NULL;
275 char *bio_mem_data = 0;
278 const ASN1_INTEGER *bs;
279 #if OPENSSL_VERSION_NUMBER > 0x10100000L
280 const X509_ALGOR *tsig_alg;
286 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_new_mem_buf() failed");
291 * Searching for last item in certificates linked list
293 while (last->next != NULL)
299 * Preparing next item in linked list for next certificate
301 last->next = malloc_or_die(sizeof(struct certs_chain));
302 last->next->next = NULL;
303 memset(last->next->info_buf, 0, sizeof(last->next->info_buf));
304 memset(last->next->file_buf, 0, sizeof(last->next->file_buf));
307 * Saving certificate file into buffer
309 if (!PEM_write_bio_X509(bio, crt))
311 log_ssl_errors(LOG_LEVEL_ERROR, "PEM_write_X509() failed");
316 len = BIO_get_mem_data(bio, &bio_mem_data);
318 if (len > (sizeof(last->file_buf) - 1))
320 log_error(LOG_LEVEL_ERROR,
321 "X509 PEM cert len %ld is larger than buffer len %lu",
322 len, sizeof(last->file_buf) - 1);
323 len = sizeof(last->file_buf) - 1;
326 strncpy(last->file_buf, bio_mem_data, (size_t)len);
328 bio = BIO_new(BIO_s_mem());
331 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_new_mem_buf() failed");
337 * Saving certificate information into buffer
339 l = X509_get_version(crt);
340 if (l >= 0 && l <= 2)
342 if (BIO_printf(bio, "cert. version : %ld\n", l + 1) <= 0)
344 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_printf() for version failed");
351 if (BIO_printf(bio, "cert. version : Unknown (%ld)\n", l) <= 0)
353 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_printf() for version failed");
359 if (BIO_puts(bio, "serial number : ") <= 0)
361 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_puts() for serial failed");
365 bs = X509_get0_serialNumber(crt);
366 if (bs->length <= (int)sizeof(long))
369 l = ASN1_INTEGER_get(bs);
380 if (bs->type == V_ASN1_NEG_INTEGER)
382 ul = 0 - (unsigned long)l;
387 ul = (unsigned long)l;
390 if (BIO_printf(bio, " %s%lu (%s0x%lx)\n", neg, ul, neg, ul) <= 0)
392 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_printf() for serial failed");
399 if (bs->type == V_ASN1_NEG_INTEGER)
401 if (BIO_puts(bio, " (Negative)") < 0)
403 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_puts() for serial failed");
408 for (int i = 0; i < bs->length; i++)
410 if (BIO_printf(bio, "%02x%c", bs->data[i],
411 ((i + 1 == bs->length) ? '\n' : ':')) <= 0)
413 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_printf() for serial failed");
420 if (BIO_puts(bio, "issuer name : ") <= 0)
422 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_puts() for issuer failed");
426 if (X509_NAME_print_ex(bio, X509_get_issuer_name(crt), 0, 0) < 0)
428 log_ssl_errors(LOG_LEVEL_ERROR, "X509_NAME_print_ex() for issuer failed");
433 if (BIO_puts(bio, "\nsubject name : ") <= 0)
435 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_puts() for subject failed");
439 if (X509_NAME_print_ex(bio, X509_get_subject_name(crt), 0, 0) < 0) {
440 log_ssl_errors(LOG_LEVEL_ERROR, "X509_NAME_print_ex() for subject failed");
445 if (BIO_puts(bio, "\nissued on : ") <= 0)
447 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_puts() for issued on failed");
451 if (!ASN1_TIME_print(bio, X509_get0_notBefore(crt)))
453 log_ssl_errors(LOG_LEVEL_ERROR, "ASN1_TIME_print() for issued on failed");
458 if (BIO_puts(bio, "\nexpires on : ") <= 0)
460 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_puts() for expires on failed");
464 if (!ASN1_TIME_print(bio, X509_get0_notAfter(crt)))
466 log_ssl_errors(LOG_LEVEL_ERROR, "ASN1_TIME_print() for expires on failed");
471 #if OPENSSL_VERSION_NUMBER > 0x10100000L
472 if (BIO_puts(bio, "\nsigned using : ") <= 0)
474 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_puts() for signed using failed");
478 tsig_alg = X509_get0_tbs_sigalg(crt);
479 if (!i2a_ASN1_OBJECT(bio, tsig_alg->algorithm))
481 log_ssl_errors(LOG_LEVEL_ERROR, "i2a_ASN1_OBJECT() for signed using failed");
486 pkey = X509_get_pubkey(crt);
489 log_ssl_errors(LOG_LEVEL_ERROR, "X509_get_pubkey() failed");
494 switch (EVP_PKEY_base_id(pkey))
497 ret = BIO_printf(bio, "\n%-" BC "s: %d bits", "RSA key size", EVP_PKEY_bits(pkey));
500 ret = BIO_printf(bio, "\n%-" BC "s: %d bits", "DSA key size", EVP_PKEY_bits(pkey));
503 ret = BIO_printf(bio, "\n%-" BC "s: %d bits", "non-RSA/DSA key size", EVP_PKEY_bits(pkey));
508 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_printf() for key size failed");
513 loc = X509_get_ext_by_NID(crt, NID_basic_constraints, -1);
516 X509_EXTENSION *ex = X509_get_ext(crt, loc);
517 if (BIO_puts(bio, "\nbasic constraints : ") <= 0)
519 log_ssl_errors(LOG_LEVEL_ERROR,
520 "BIO_printf() for basic constraints failed");
524 if (!X509V3_EXT_print(bio, ex, 0, 0))
526 if (!ASN1_STRING_print_ex(bio, X509_EXTENSION_get_data(ex), ASN1_STRFLGS_RFC2253))
528 log_ssl_errors(LOG_LEVEL_ERROR,
529 "ASN1_STRING_print_ex() for basic constraints failed");
536 loc = X509_get_ext_by_NID(crt, NID_subject_alt_name, -1);
539 X509_EXTENSION *ex = X509_get_ext(crt, loc);
540 if (BIO_puts(bio, "\nsubject alt name : ") <= 0)
542 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_printf() for alt name failed");
546 if (!X509V3_EXT_print(bio, ex, 0, 0))
548 if (!ASN1_STRING_print_ex(bio, X509_EXTENSION_get_data(ex),
549 ASN1_STRFLGS_RFC2253))
551 log_ssl_errors(LOG_LEVEL_ERROR,
552 "ASN1_STRING_print_ex() for alt name failed");
559 loc = X509_get_ext_by_NID(crt, NID_netscape_cert_type, -1);
562 X509_EXTENSION *ex = X509_get_ext(crt, loc);
563 if (BIO_puts(bio, "\ncert. type : ") <= 0)
565 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_printf() for cert type failed");
569 if (!X509V3_EXT_print(bio, ex, 0, 0))
571 if (!ASN1_STRING_print_ex(bio, X509_EXTENSION_get_data(ex),
572 ASN1_STRFLGS_RFC2253))
574 log_ssl_errors(LOG_LEVEL_ERROR,
575 "ASN1_STRING_print_ex() for cert type failed");
582 loc = X509_get_ext_by_NID(crt, NID_key_usage, -1);
585 X509_EXTENSION *ex = X509_get_ext(crt, loc);
586 if (BIO_puts(bio, "\nkey usage : ") <= 0)
588 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_printf() for key usage failed");
592 if (!X509V3_EXT_print(bio, ex, 0, 0))
594 if (!ASN1_STRING_print_ex(bio, X509_EXTENSION_get_data(ex),
595 ASN1_STRFLGS_RFC2253))
597 log_ssl_errors(LOG_LEVEL_ERROR,
598 "ASN1_STRING_print_ex() for key usage failed");
605 loc = X509_get_ext_by_NID(crt, NID_ext_key_usage, -1);
607 X509_EXTENSION *ex = X509_get_ext(crt, loc);
608 if (BIO_puts(bio, "\next key usage : ") <= 0)
610 log_ssl_errors(LOG_LEVEL_ERROR,
611 "BIO_printf() for ext key usage failed");
615 if (!X509V3_EXT_print(bio, ex, 0, 0))
617 if (!ASN1_STRING_print_ex(bio, X509_EXTENSION_get_data(ex),
618 ASN1_STRFLGS_RFC2253))
620 log_ssl_errors(LOG_LEVEL_ERROR,
621 "ASN1_STRING_print_ex() for ext key usage failed");
628 loc = X509_get_ext_by_NID(crt, NID_certificate_policies, -1);
631 X509_EXTENSION *ex = X509_get_ext(crt, loc);
632 if (BIO_puts(bio, "\ncertificate policies : ") <= 0)
634 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_printf() for certificate policies failed");
638 if (!X509V3_EXT_print(bio, ex, 0, 0))
640 if (!ASN1_STRING_print_ex(bio, X509_EXTENSION_get_data(ex),
641 ASN1_STRFLGS_RFC2253))
643 log_ssl_errors(LOG_LEVEL_ERROR,
644 "ASN1_STRING_print_ex() for certificate policies failed");
651 /* make valgrind happy */
652 static const char zero = 0;
653 BIO_write(bio, &zero, 1);
655 len = BIO_get_mem_data(bio, &bio_mem_data);
656 encoded_text = html_encode(bio_mem_data);
657 if (encoded_text == NULL)
659 log_error(LOG_LEVEL_ERROR,
660 "Failed to HTML-encode the certificate information");
665 strlcpy(last->info_buf, encoded_text, sizeof(last->info_buf));
682 /*********************************************************************
684 * Function : host_to_hash
686 * Description : Creates MD5 hash from host name. Host name is loaded
687 * from structure csp and saved again into it.
690 * 1 : csp = Current client state (buffers, headers, etc...)
692 * Returns : 1 => Error while creating hash
693 * 0 => Hash created successfully
695 *********************************************************************/
696 static int host_to_hash(struct client_state *csp)
700 memset(csp->http->hash_of_host, 0, sizeof(csp->http->hash_of_host));
701 MD5((unsigned char *)csp->http->host, strlen(csp->http->host),
702 csp->http->hash_of_host);
704 /* Converting hash into string with hex */
708 if ((ret = sprintf((char *)csp->http->hash_of_host_hex + 2 * i, "%02x",
709 csp->http->hash_of_host[i])) < 0)
711 log_error(LOG_LEVEL_ERROR, "Sprintf return value: %d", ret);
720 /*********************************************************************
722 * Function : create_client_ssl_connection
724 * Description : Creates TLS/SSL secured connection with client
727 * 1 : csp = Current client state (buffers, headers, etc...)
729 * Returns : 0 on success, negative value if connection wasn't created
732 *********************************************************************/
733 extern int create_client_ssl_connection(struct client_state *csp)
735 struct ssl_attr *ssl_attr = &csp->ssl_client_attr;
736 /* Paths to certificates file and key file */
737 char *key_file = NULL;
738 char *ca_file = NULL;
739 char *cert_file = NULL;
744 * Initializing OpenSSL structures for TLS/SSL connection
749 * Preparing hash of host for creating certificates
751 ret = host_to_hash(csp);
754 log_error(LOG_LEVEL_ERROR, "Generating hash of host failed: %d", ret);
760 * Preparing paths to certificates files and key file
762 ca_file = csp->config->ca_cert_file;
763 cert_file = make_certs_path(csp->config->certificate_directory,
764 (const char *)csp->http->hash_of_host_hex, CERT_FILE_TYPE);
765 key_file = make_certs_path(csp->config->certificate_directory,
766 (const char *)csp->http->hash_of_host_hex, KEY_FILE_TYPE);
768 if (cert_file == NULL || key_file == NULL)
775 * Generating certificate for requested host. Mutex to prevent
776 * certificate and key inconsistence must be locked.
778 privoxy_mutex_lock(&certificate_mutex);
780 ret = generate_webpage_certificate(csp);
783 log_error(LOG_LEVEL_ERROR,
784 "Generate_webpage_certificate failed: %d", ret);
785 privoxy_mutex_unlock(&certificate_mutex);
789 privoxy_mutex_unlock(&certificate_mutex);
791 if (!(ssl_attr->openssl_attr.ctx = SSL_CTX_new(SSLv23_server_method())))
793 log_ssl_errors(LOG_LEVEL_ERROR, "Unable to create SSL context");
798 /* Set the key and cert */
799 if (SSL_CTX_use_certificate_file(ssl_attr->openssl_attr.ctx,
800 cert_file, SSL_FILETYPE_PEM) != 1)
802 log_ssl_errors(LOG_LEVEL_ERROR,
803 "Loading webpage certificate %s failed", cert_file);
808 if (SSL_CTX_use_PrivateKey_file(ssl_attr->openssl_attr.ctx,
809 key_file, SSL_FILETYPE_PEM) != 1)
811 log_ssl_errors(LOG_LEVEL_ERROR,
812 "Loading webpage certificate private key %s failed", key_file);
817 SSL_CTX_set_options(ssl_attr->openssl_attr.ctx, SSL_OP_NO_SSLv3);
819 if (!(ssl_attr->openssl_attr.bio = BIO_new_ssl(ssl_attr->openssl_attr.ctx, 0)))
821 log_ssl_errors(LOG_LEVEL_ERROR, "Unable to create BIO structure");
826 if (BIO_get_ssl(ssl_attr->openssl_attr.bio, &ssl) != 1)
828 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_get_ssl failed");
833 if (!SSL_set_fd(ssl, csp->cfd))
835 log_ssl_errors(LOG_LEVEL_ERROR, "SSL_set_fd failed");
841 * Handshake with client
843 log_error(LOG_LEVEL_CONNECT,
844 "Performing the TLS/SSL handshake with client. Hash of host: %s",
845 csp->http->hash_of_host_hex);
846 if (BIO_do_handshake(ssl_attr->openssl_attr.bio) != 1)
848 log_ssl_errors(LOG_LEVEL_ERROR,
849 "The TLS/SSL handshake with the client failed");
854 log_error(LOG_LEVEL_CONNECT, "Client successfully connected over TLS/SSL");
855 csp->ssl_with_client_is_opened = 1;
860 * Freeing allocated paths to files
865 /* Freeing structures if connection wasn't created successfully */
868 free_client_ssl_structures(csp);
874 /*********************************************************************
876 * Function : close_client_ssl_connection
878 * Description : Closes TLS/SSL connection with client. This function
879 * checks if this connection is already created.
882 * 1 : csp = Current client state (buffers, headers, etc...)
886 *********************************************************************/
887 extern void close_client_ssl_connection(struct client_state *csp)
889 struct ssl_attr *ssl_attr = &csp->ssl_client_attr;
892 if (csp->ssl_with_client_is_opened == 0)
898 * Notifying the peer that the connection is being closed.
900 BIO_ssl_shutdown(ssl_attr->openssl_attr.bio);
901 if (BIO_get_ssl(ssl_attr->openssl_attr.bio, &ssl) != 1)
903 log_ssl_errors(LOG_LEVEL_ERROR,
904 "BIO_get_ssl() failed in close_client_ssl_connection()");
909 * Pretend we received a shutdown alert so
910 * the BIO_free_all() call later on returns
913 SSL_set_shutdown(ssl, SSL_RECEIVED_SHUTDOWN);
915 free_client_ssl_structures(csp);
916 csp->ssl_with_client_is_opened = 0;
920 /*********************************************************************
922 * Function : free_client_ssl_structures
924 * Description : Frees structures used for SSL communication with
928 * 1 : csp = Current client state (buffers, headers, etc...)
932 *********************************************************************/
933 static void free_client_ssl_structures(struct client_state *csp)
935 struct ssl_attr *ssl_attr = &csp->ssl_client_attr;
937 if (ssl_attr->openssl_attr.bio)
939 BIO_free_all(ssl_attr->openssl_attr.bio);
941 if (ssl_attr->openssl_attr.ctx)
943 SSL_CTX_free(ssl_attr->openssl_attr.ctx);
948 /*********************************************************************
950 * Function : close_server_ssl_connection
952 * Description : Closes TLS/SSL connection with server. This function
953 * checks if this connection is already opened.
956 * 1 : csp = Current client state (buffers, headers, etc...)
960 *********************************************************************/
961 extern void close_server_ssl_connection(struct client_state *csp)
963 struct ssl_attr *ssl_attr = &csp->ssl_server_attr;
966 if (csp->ssl_with_server_is_opened == 0)
972 * Notifying the peer that the connection is being closed.
974 BIO_ssl_shutdown(ssl_attr->openssl_attr.bio);
975 if (BIO_get_ssl(ssl_attr->openssl_attr.bio, &ssl) != 1)
977 log_ssl_errors(LOG_LEVEL_ERROR,
978 "BIO_get_ssl() failed in close_server_ssl_connection()");
983 * Pretend we received a shutdown alert so
984 * the BIO_free_all() call later on returns
987 SSL_set_shutdown(ssl, SSL_RECEIVED_SHUTDOWN);
989 free_server_ssl_structures(csp);
990 csp->ssl_with_server_is_opened = 0;
994 /*********************************************************************
996 * Function : create_server_ssl_connection
998 * Description : Creates TLS/SSL secured connection with server.
1001 * 1 : csp = Current client state (buffers, headers, etc...)
1003 * Returns : 0 on success, negative value if connection wasn't created
1006 *********************************************************************/
1007 extern int create_server_ssl_connection(struct client_state *csp)
1009 openssl_connection_attr *ssl_attrs = &csp->ssl_server_attr.openssl_attr;
1011 char *trusted_cas_file = NULL;
1012 STACK_OF(X509) *chain;
1015 csp->server_cert_verification_result = SSL_CERT_NOT_VERIFIED;
1016 csp->server_certs_chain.next = NULL;
1018 /* Setting path to file with trusted CAs */
1019 trusted_cas_file = csp->config->trusted_cas_file;
1021 ssl_attrs->ctx = SSL_CTX_new(SSLv23_method());
1022 if (!ssl_attrs->ctx)
1024 log_ssl_errors(LOG_LEVEL_ERROR, "SSL context creation failed");
1030 * Loading file with trusted CAs
1032 if (!SSL_CTX_load_verify_locations(ssl_attrs->ctx, trusted_cas_file, NULL))
1034 log_ssl_errors(LOG_LEVEL_ERROR, "Loading trusted CAs file %s failed",
1040 SSL_CTX_set_verify(ssl_attrs->ctx, SSL_VERIFY_NONE, NULL);
1041 SSL_CTX_set_options(ssl_attrs->ctx, SSL_OP_NO_SSLv3);
1043 if (!(ssl_attrs->bio = BIO_new_ssl(ssl_attrs->ctx, 1)))
1045 log_ssl_errors(LOG_LEVEL_ERROR, "Unable to create BIO structure");
1050 if (BIO_get_ssl(ssl_attrs->bio, &ssl) != 1)
1052 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_get_ssl failed");
1057 if (!SSL_set_fd(ssl, csp->server_connection.sfd))
1059 log_ssl_errors(LOG_LEVEL_ERROR, "SSL_set_fd failed");
1065 * Set the hostname to check against the received server certificate
1067 #if OPENSSL_VERSION_NUMBER > 0x10100000L
1068 if (!SSL_set1_host(ssl, csp->http->host))
1070 log_ssl_errors(LOG_LEVEL_ERROR, "SSL_set1_host failed");
1075 if (host_is_ip_address(csp->http->host))
1077 if (X509_VERIFY_PARAM_set1_ip_asc(ssl->param, csp->http->host) != 1)
1079 log_ssl_errors(LOG_LEVEL_ERROR,
1080 "X509_VERIFY_PARAM_set1_ip_asc() failed");
1087 if (X509_VERIFY_PARAM_set1_host(ssl->param, csp->http->host, 0) != 1)
1089 log_ssl_errors(LOG_LEVEL_ERROR,
1090 "X509_VERIFY_PARAM_set1_host() failed");
1097 if (!SSL_set_tlsext_host_name(ssl, csp->http->host))
1099 log_ssl_errors(LOG_LEVEL_ERROR, "SSL_set_tlsext_host_name failed");
1105 * Handshake with server
1107 log_error(LOG_LEVEL_CONNECT,
1108 "Performing the TLS/SSL handshake with the server");
1110 if (BIO_do_handshake(ssl_attrs->bio) != 1)
1112 log_ssl_errors(LOG_LEVEL_ERROR,
1113 "The TLS/SSL handshake with the server failed");
1118 chain = SSL_get_peer_cert_chain(ssl);
1121 for (int i = 0; i < sk_X509_num(chain); i++)
1123 if (ssl_store_cert(csp, sk_X509_value(chain, i)) != 0)
1125 log_error(LOG_LEVEL_ERROR, "ssl_store_cert failed");
1132 if (!csp->dont_verify_certificate)
1134 long verify_result = SSL_get_verify_result(ssl);
1135 if (verify_result == X509_V_OK)
1138 csp->server_cert_verification_result = SSL_CERT_VALID;
1142 csp->server_cert_verification_result = verify_result;
1143 log_error(LOG_LEVEL_ERROR,
1144 "X509 certificate verification for %s failed: %s",
1145 csp->http->hostport, X509_verify_cert_error_string(verify_result));
1151 log_error(LOG_LEVEL_CONNECT, "Server successfully connected over TLS/SSL");
1154 * Server certificate chain is valid, so we can clean
1155 * chain, because we will not send it to client.
1157 free_certificate_chain(csp);
1159 csp->ssl_with_server_is_opened = 1;
1161 /* Freeing structures if connection wasn't created successfully */
1164 free_server_ssl_structures(csp);
1171 /*********************************************************************
1173 * Function : free_server_ssl_structures
1175 * Description : Frees structures used for SSL communication with server
1178 * 1 : csp = Current client state (buffers, headers, etc...)
1182 *********************************************************************/
1183 static void free_server_ssl_structures(struct client_state *csp)
1185 struct ssl_attr *ssl_attr = &csp->ssl_server_attr;
1187 if (ssl_attr->openssl_attr.bio)
1189 BIO_free_all(ssl_attr->openssl_attr.bio);
1191 if (ssl_attr->openssl_attr.ctx)
1193 SSL_CTX_free(ssl_attr->openssl_attr.ctx);
1198 /*********************************************************************
1200 * Function : log_ssl_errors
1202 * Description : Log SSL errors
1205 * 1 : debuglevel = Debug level
1206 * 2 : desc = Error description
1210 *********************************************************************/
1211 static void log_ssl_errors(int debuglevel, const char* fmt, ...)
1213 unsigned long err_code;
1214 char prefix[ERROR_BUF_SIZE];
1216 va_start(args, fmt);
1217 vsnprintf(prefix, sizeof(prefix), fmt, args);
1220 while ((err_code = ERR_get_error()))
1222 char err_buf[ERROR_BUF_SIZE];
1224 ERR_error_string_n(err_code, err_buf, sizeof(err_buf));
1225 log_error(debuglevel, "%s: %s", prefix, err_buf);
1229 * In case if called by mistake and there were
1230 * no TLS/SSL errors let's report it to the log.
1234 log_error(debuglevel, "%s: no TLS/SSL errors detected", prefix);
1239 /*********************************************************************
1241 * Function : ssl_base64_encode
1243 * Description : Encode a buffer into base64 format.
1246 * 1 : dst = Destination buffer
1247 * 2 : dlen = Destination buffer length
1248 * 3 : olen = Number of bytes written
1249 * 4 : src = Source buffer
1250 * 5 : slen = Amount of data to be encoded
1252 * Returns : 0 on success, error code othervise
1254 *********************************************************************/
1255 extern int ssl_base64_encode(unsigned char *dst, size_t dlen, size_t *olen,
1256 const unsigned char *src, size_t slen)
1258 *olen = 4 * ((slen/3) + ((slen%3) ? 1 : 0)) + 1;
1263 *olen = (size_t)EVP_EncodeBlock(dst, src, (int)slen) + 1;
1268 /*********************************************************************
1270 * Function : close_file_stream
1272 * Description : Close file stream, report error on close error
1275 * 1 : f = file stream to close
1276 * 2 : path = path for error report
1280 *********************************************************************/
1281 static void close_file_stream(FILE *f, const char *path)
1285 log_error(LOG_LEVEL_ERROR,
1286 "Error closing file %s: %s", path, strerror(errno));
1291 /*********************************************************************
1293 * Function : write_certificate
1295 * Description : Writes certificate into file.
1298 * 1 : crt = certificate to write into file
1299 * 2 : output_file = path to save certificate file
1302 * Returns : 1 on success success or negative value
1304 *********************************************************************/
1305 static int write_certificate(X509 *crt, const char *output_file)
1311 * Saving certificate into file
1313 if ((f = fopen(output_file, "w")) == NULL)
1315 log_error(LOG_LEVEL_ERROR, "Opening file %s to save certificate failed",
1320 ret = PEM_write_X509(f, crt);
1323 log_ssl_errors(LOG_LEVEL_ERROR,
1324 "Writing certificate into file %s failed", output_file);
1328 close_file_stream(f, output_file);
1333 /*********************************************************************
1335 * Function : write_private_key
1337 * Description : Writes private key into file and copies saved
1338 * content into given pointer to string. If function
1339 * returns 0 for success, this copy must be freed by
1343 * 1 : key = key to write into file
1344 * 2 : ret_buf = pointer to string with created key file content
1345 * 3 : key_file_path = path where to save key file
1347 * Returns : Length of written private key on success or negative value
1350 *********************************************************************/
1351 static int write_private_key(EVP_PKEY *key, char **ret_buf,
1352 const char *key_file_path)
1354 size_t len = 0; /* Length of created key */
1355 FILE *f = NULL; /* File to save certificate */
1357 BIO *bio_mem = BIO_new(BIO_s_mem());
1358 char *bio_mem_data = 0;
1360 if (bio_mem == NULL)
1362 log_ssl_errors(LOG_LEVEL_ERROR, "write_private_key memory allocation failure");
1367 * Writing private key into PEM string
1369 if (!PEM_write_bio_PrivateKey(bio_mem, key, NULL, NULL, 0, NULL, NULL))
1371 log_ssl_errors(LOG_LEVEL_ERROR,
1372 "Writing private key into PEM string failed");
1377 len = (size_t)BIO_get_mem_data(bio_mem, &bio_mem_data);
1379 /* Initializing buffer for key file content */
1380 *ret_buf = zalloc_or_die(len + 1);
1381 (*ret_buf)[len] = 0;
1383 strncpy(*ret_buf, bio_mem_data, len);
1386 * Saving key into file
1388 if ((f = fopen(key_file_path, "wb")) == NULL)
1390 log_error(LOG_LEVEL_ERROR,
1391 "Opening file %s to save private key failed: %E",
1397 if (fwrite(*ret_buf, 1, len, f) != len)
1399 log_error(LOG_LEVEL_ERROR,
1400 "Writing private key into file %s failed",
1402 close_file_stream(f, key_file_path);
1407 close_file_stream(f, key_file_path);
1421 /*********************************************************************
1423 * Function : generate_key
1425 * Description : Tests if private key for host saved in csp already
1426 * exists. If this file doesn't exists, a new key is
1427 * generated and saved in a file. The generated key is also
1428 * copied into given parameter key_buf, which must be then
1429 * freed by caller. If file with key exists, key_buf
1430 * contain NULL and no private key is generated.
1433 * 1 : csp = Current client state (buffers, headers, etc...)
1434 * 2 : key_buf = buffer to save new generated key
1436 * Returns : -1 => Error while generating private key
1437 * 0 => Key already exists
1438 * >0 => Length of generated private key
1440 *********************************************************************/
1441 static int generate_key(struct client_state *csp, char **key_buf)
1444 char* key_file_path = NULL;
1445 BIGNUM *exp = BN_new();
1446 RSA *rsa = RSA_new();
1447 EVP_PKEY *key = EVP_PKEY_new();
1449 if (exp == NULL || rsa == NULL || key == NULL)
1451 log_ssl_errors(LOG_LEVEL_ERROR, "RSA key memory allocation failure");
1456 if (BN_set_word(exp, RSA_KEY_PUBLIC_EXPONENT) != 1)
1458 log_ssl_errors(LOG_LEVEL_ERROR, "Setting RSA key exponent failed");
1463 key_file_path = make_certs_path(csp->config->certificate_directory,
1464 (char *)csp->http->hash_of_host_hex, KEY_FILE_TYPE);
1465 if (key_file_path == NULL)
1472 * Test if key already exists. If so, we don't have to create it again.
1474 if (file_exists(key_file_path) == 1)
1480 ret = RSA_generate_key_ex(rsa, RSA_KEYSIZE, exp, NULL);
1483 log_ssl_errors(LOG_LEVEL_ERROR, "RSA key generation failure");
1488 if (!EVP_PKEY_set1_RSA(key, rsa))
1490 log_ssl_errors(LOG_LEVEL_ERROR,
1491 "Error assigning RSA key pair to PKEY structure");
1497 * Exporting private key into file
1499 if ((ret = write_private_key(key, key_buf, key_file_path)) < 0)
1501 log_error(LOG_LEVEL_ERROR,
1502 "Writing private key into file %s failed", key_file_path);
1509 * Freeing used variables
1523 freez(key_file_path);
1529 /*********************************************************************
1531 * Function : ssl_certificate_load
1533 * Description : Loads certificate from file.
1536 * 1 : cert_path = The certificate path to load
1538 * Returns : NULL => error loading certificate,
1539 * pointer to certificate instance otherwise
1541 *********************************************************************/
1542 static X509* ssl_certificate_load(const char *cert_path)
1545 FILE *cert_f = NULL;
1547 if (!(cert_f = fopen(cert_path, "r")))
1549 log_error(LOG_LEVEL_ERROR,
1550 "Error opening certificate file %s: %s", cert_path, strerror(errno));
1554 if (!(cert = PEM_read_X509(cert_f, NULL, NULL, NULL)))
1556 log_ssl_errors(LOG_LEVEL_ERROR,
1557 "Error reading certificate file %s", cert_path);
1560 close_file_stream(cert_f, cert_path);
1565 /*********************************************************************
1567 * Function : ssl_certificate_is_invalid
1569 * Description : Checks whether or not a certificate is valid.
1570 * Currently only checks that the certificate can be
1571 * parsed and that the "valid to" date is in the future.
1574 * 1 : cert_file = The certificate to check
1576 * Returns : 0 => The certificate is valid.
1577 * 1 => The certificate is invalid
1579 *********************************************************************/
1580 static int ssl_certificate_is_invalid(const char *cert_file)
1586 if (!(cert = ssl_certificate_load(cert_file)))
1588 log_ssl_errors(LOG_LEVEL_ERROR,
1589 "Error reading certificate file %s", cert_file);
1593 ret = X509_cmp_current_time(X509_get_notAfter(cert));
1596 log_ssl_errors(LOG_LEVEL_ERROR,
1597 "Error checking certificate %s validity", cert_file);
1603 return ret == -1 ? 1 : 0;
1607 /*********************************************************************
1609 * Function : set_x509_ext
1611 * Description : Sets the X509V3 extension data
1614 * 1 : cert = The certificate to modify
1615 * 2 : issuer = Issuer certificate
1616 * 3 : nid = OpenSSL NID
1617 * 4 : value = extension value
1619 * Returns : 0 => Error while setting extensuon data
1622 *********************************************************************/
1623 static int set_x509_ext(X509 *cert, X509 *issuer, int nid, char *value)
1625 X509_EXTENSION *ext = NULL;
1629 X509V3_set_ctx(&ctx, issuer, cert, NULL, NULL, 0);
1630 ext = X509V3_EXT_conf_nid(NULL, &ctx, nid, value);
1633 log_ssl_errors(LOG_LEVEL_ERROR, "X509V3_EXT_conf_nid failure");
1637 if (!X509_add_ext(cert, ext, -1))
1639 log_ssl_errors(LOG_LEVEL_ERROR, "X509_add_ext failure");
1647 X509_EXTENSION_free(ext);
1653 /*********************************************************************
1655 * Function : set_subject_alternative_name
1657 * Description : Sets the Subject Alternative Name extension to a cert
1660 * 1 : cert = The certificate to modify
1661 * 2 : issuer = Issuer certificate
1662 * 3 : hostname = The hostname to add
1664 * Returns : 0 => Error while creating certificate.
1667 *********************************************************************/
1668 static int set_subject_alternative_name(X509 *cert, X509 *issuer, const char *hostname)
1670 size_t altname_len = strlen(hostname) + sizeof(CERTIFICATE_ALT_NAME_PREFIX);
1671 char alt_name_buf[altname_len];
1673 snprintf(alt_name_buf, sizeof(alt_name_buf),
1674 CERTIFICATE_ALT_NAME_PREFIX"%s", hostname);
1675 return set_x509_ext(cert, issuer, NID_subject_alt_name, alt_name_buf);
1679 /*********************************************************************
1681 * Function : generate_webpage_certificate
1683 * Description : Creates certificate file in presetted directory.
1684 * If certificate already exists, no other certificate
1685 * will be created. Subject of certificate is named
1686 * by csp->http->host from parameter. This function also
1687 * triggers generating of private key for new certificate.
1690 * 1 : csp = Current client state (buffers, headers, etc...)
1692 * Returns : -1 => Error while creating certificate.
1693 * 0 => Certificate already exists.
1694 * 1 => Certificate created
1696 *********************************************************************/
1697 static int generate_webpage_certificate(struct client_state *csp)
1699 char *key_buf = NULL; /* Buffer for created key */
1700 X509 *issuer_cert = NULL;
1703 EVP_PKEY *loaded_subject_key = NULL;
1704 EVP_PKEY *loaded_issuer_key = NULL;
1705 X509_NAME *issuer_name;
1706 X509_NAME *subject_name = NULL;
1707 ASN1_TIME *asn_time = NULL;
1708 ASN1_INTEGER *serial = NULL;
1709 BIGNUM *serial_num = NULL;
1712 cert_options cert_opt;
1713 char cert_valid_from[VALID_DATETIME_BUFLEN];
1714 char cert_valid_to[VALID_DATETIME_BUFLEN];
1716 /* Paths to keys and certificates needed to create certificate */
1717 cert_opt.issuer_key = NULL;
1718 cert_opt.subject_key = NULL;
1719 cert_opt.issuer_crt = NULL;
1721 cert_opt.output_file = make_certs_path(csp->config->certificate_directory,
1722 (const char *)csp->http->hash_of_host_hex, CERT_FILE_TYPE);
1723 if (cert_opt.output_file == NULL)
1728 cert_opt.subject_key = make_certs_path(csp->config->certificate_directory,
1729 (const char *)csp->http->hash_of_host_hex, KEY_FILE_TYPE);
1730 if (cert_opt.subject_key == NULL)
1732 freez(cert_opt.output_file);
1736 if (file_exists(cert_opt.output_file) == 1)
1738 /* The file exists, but is it valid? */
1739 if (ssl_certificate_is_invalid(cert_opt.output_file))
1741 log_error(LOG_LEVEL_CONNECT,
1742 "Certificate %s is no longer valid. Removing it.",
1743 cert_opt.output_file);
1744 if (unlink(cert_opt.output_file))
1746 log_error(LOG_LEVEL_ERROR, "Failed to unlink %s: %E",
1747 cert_opt.output_file);
1749 freez(cert_opt.output_file);
1750 freez(cert_opt.subject_key);
1754 if (unlink(cert_opt.subject_key))
1756 log_error(LOG_LEVEL_ERROR, "Failed to unlink %s: %E",
1757 cert_opt.subject_key);
1759 freez(cert_opt.output_file);
1760 freez(cert_opt.subject_key);
1767 freez(cert_opt.output_file);
1768 freez(cert_opt.subject_key);
1775 * Create key for requested host
1777 int subject_key_len = generate_key(csp, &key_buf);
1778 if (subject_key_len < 0)
1780 freez(cert_opt.output_file);
1781 freez(cert_opt.subject_key);
1782 log_error(LOG_LEVEL_ERROR, "Key generating failed");
1787 * Converting unsigned long serial number to char * serial number.
1788 * We must compute length of serial number in string + terminating null.
1790 unsigned long certificate_serial = get_certificate_serial(csp);
1791 unsigned long certificate_serial_time = (unsigned long)time(NULL);
1792 int serial_num_size = snprintf(NULL, 0, "%lu%lu",
1793 certificate_serial_time, certificate_serial) + 1;
1794 if (serial_num_size <= 0)
1796 serial_num_size = 1;
1799 char serial_num_text[serial_num_size]; /* Buffer for serial number */
1800 ret = snprintf(serial_num_text, (size_t)serial_num_size, "%lu%lu",
1801 certificate_serial_time, certificate_serial);
1802 if (ret < 0 || ret >= serial_num_size)
1804 log_error(LOG_LEVEL_ERROR,
1805 "Converting certificate serial number into string failed");
1811 * Preparing parameters for certificate
1813 subject_name = X509_NAME_new();
1816 log_ssl_errors(LOG_LEVEL_ERROR, "RSA key memory allocation failure");
1821 if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_COMMON_NAME_FCODE,
1822 MBSTRING_ASC, (void *)csp->http->host, -1, -1, 0))
1824 log_ssl_errors(LOG_LEVEL_ERROR,
1825 "X509 subject name (code: %s, val: %s) error",
1826 CERT_PARAM_COMMON_NAME_FCODE, csp->http->host);
1830 if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_ORGANIZATION_FCODE,
1831 MBSTRING_ASC, (void *)csp->http->host, -1, -1, 0))
1833 log_ssl_errors(LOG_LEVEL_ERROR,
1834 "X509 subject name (code: %s, val: %s) error",
1835 CERT_PARAM_ORGANIZATION_FCODE, csp->http->host);
1839 if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_ORG_UNIT_FCODE,
1840 MBSTRING_ASC, (void *)csp->http->host, -1, -1, 0))
1842 log_ssl_errors(LOG_LEVEL_ERROR,
1843 "X509 subject name (code: %s, val: %s) error",
1844 CERT_PARAM_ORG_UNIT_FCODE, csp->http->host);
1848 if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_COUNTRY_FCODE,
1849 MBSTRING_ASC, (void *)CERT_PARAM_COUNTRY_CODE, -1, -1, 0))
1851 log_ssl_errors(LOG_LEVEL_ERROR,
1852 "X509 subject name (code: %s, val: %s) error",
1853 CERT_PARAM_COUNTRY_FCODE, csp->http->host);
1858 cert_opt.issuer_crt = csp->config->ca_cert_file;
1859 cert_opt.issuer_key = csp->config->ca_key_file;
1861 if (get_certificate_valid_from_date(cert_valid_from,
1862 sizeof(cert_valid_from), VALID_DATETIME_FMT)
1863 || get_certificate_valid_to_date(cert_valid_to,
1864 sizeof(cert_valid_to), VALID_DATETIME_FMT))
1866 log_error(LOG_LEVEL_ERROR, "Generating one of the validity dates failed");
1871 cert_opt.subject_pwd = CERT_SUBJECT_PASSWORD;
1872 cert_opt.issuer_pwd = csp->config->ca_password;
1873 cert_opt.not_before = cert_valid_from;
1874 cert_opt.not_after = cert_valid_to;
1875 cert_opt.serial = serial_num_text;
1876 cert_opt.max_pathlen = -1;
1879 * Test if the private key was already created.
1880 * XXX: Can this still happen?
1882 if (subject_key_len == 0)
1884 log_error(LOG_LEVEL_ERROR, "Subject key was already created");
1890 * Parse serial to MPI
1892 serial_num = BN_new();
1895 log_error(LOG_LEVEL_ERROR, "generate_webpage_certificate: memory error");
1899 if (!BN_dec2bn(&serial_num, cert_opt.serial))
1901 log_ssl_errors(LOG_LEVEL_ERROR, "Failed to parse serial %s", cert_opt.serial);
1906 if (!(serial = BN_to_ASN1_INTEGER(serial_num, NULL)))
1908 log_ssl_errors(LOG_LEVEL_ERROR, "Failed to generate serial ASN1 representation");
1914 * Loading certificates
1916 if (!(issuer_cert = ssl_certificate_load(cert_opt.issuer_crt)))
1918 log_error(LOG_LEVEL_ERROR, "Loading issuer certificate %s failed",
1919 cert_opt.issuer_crt);
1924 issuer_name = X509_get_issuer_name(issuer_cert);
1927 * Loading keys from file or from buffer
1929 if (key_buf != NULL && subject_key_len > 0)
1931 pk_bio = BIO_new_mem_buf(key_buf, subject_key_len);
1933 else if (!(pk_bio = BIO_new_file(cert_opt.subject_key, "r")))
1935 log_ssl_errors(LOG_LEVEL_ERROR,
1936 "Failure opening subject key %s BIO", cert_opt.subject_key);
1941 loaded_subject_key = PEM_read_bio_PrivateKey(pk_bio, NULL, NULL,
1942 (void *)cert_opt.subject_pwd);
1943 if (!loaded_subject_key)
1945 log_ssl_errors(LOG_LEVEL_ERROR, "Parsing subject key %s failed",
1946 cert_opt.subject_key);
1951 if (!BIO_free(pk_bio))
1953 log_ssl_errors(LOG_LEVEL_ERROR, "Error closing subject key BIO");
1956 if (!(pk_bio = BIO_new_file(cert_opt.issuer_key, "r")))
1958 log_ssl_errors(LOG_LEVEL_ERROR, "Failure opening issuer key %s BIO",
1959 cert_opt.issuer_key);
1964 loaded_issuer_key = PEM_read_bio_PrivateKey(pk_bio, NULL, NULL,
1965 (void *)cert_opt.issuer_pwd);
1966 if (!loaded_issuer_key)
1968 log_ssl_errors(LOG_LEVEL_ERROR, "Parsing issuer key %s failed",
1969 cert_opt.subject_key);
1977 log_ssl_errors(LOG_LEVEL_ERROR, "Certificate allocation error");
1982 if (!X509_set_version(cert, CERTIFICATE_VERSION))
1984 log_ssl_errors(LOG_LEVEL_ERROR, "X509_set_version failed");
1990 * Setting parameters of signed certificate
1992 if (!X509_set_pubkey(cert, loaded_subject_key))
1994 log_ssl_errors(LOG_LEVEL_ERROR,
1995 "Setting public key in signed certificate failed");
2000 if (!X509_set_subject_name(cert, subject_name))
2002 log_ssl_errors(LOG_LEVEL_ERROR,
2003 "Setting subject name in signed certificate failed");
2008 if (!X509_set_issuer_name(cert, issuer_name))
2010 log_ssl_errors(LOG_LEVEL_ERROR,
2011 "Setting issuer name in signed certificate failed");
2016 if (!X509_set_serialNumber(cert, serial))
2018 log_ssl_errors(LOG_LEVEL_ERROR,
2019 "Setting serial number in signed certificate failed");
2024 asn_time = ASN1_TIME_new();
2027 log_ssl_errors(LOG_LEVEL_ERROR, "ASN1 time memory allocation failure");
2032 if (!ASN1_TIME_set_string(asn_time, cert_opt.not_after))
2034 log_ssl_errors(LOG_LEVEL_ERROR, "ASN1 time [%s] encode error", cert_opt.not_after);
2039 if (!X509_set1_notAfter(cert, asn_time))
2041 log_ssl_errors(LOG_LEVEL_ERROR,
2042 "Setting valid not after in signed certificate failed");
2047 if (!ASN1_TIME_set_string(asn_time, cert_opt.not_before))
2049 log_ssl_errors(LOG_LEVEL_ERROR, "ASN1 time encode error");
2054 if (!X509_set1_notBefore(cert, asn_time))
2056 log_ssl_errors(LOG_LEVEL_ERROR,
2057 "Setting valid not before in signed certificate failed");
2062 if (!set_x509_ext(cert, issuer_cert, NID_basic_constraints, CERTIFICATE_BASIC_CONSTRAINTS))
2064 log_ssl_errors(LOG_LEVEL_ERROR, "Setting the basicConstraints extension "
2065 "in signed certificate failed");
2070 if (!set_x509_ext(cert, issuer_cert, NID_subject_key_identifier, CERTIFICATE_SUBJECT_KEY))
2072 log_ssl_errors(LOG_LEVEL_ERROR,
2073 "Setting the Subject Key Identifier extension failed");
2078 if (!set_x509_ext(cert, issuer_cert, NID_authority_key_identifier, CERTIFICATE_AUTHORITY_KEY))
2080 log_ssl_errors(LOG_LEVEL_ERROR,
2081 "Setting the Authority Key Identifier extension failed");
2086 if (!host_is_ip_address(csp->http->host) &&
2087 !set_subject_alternative_name(cert, issuer_cert, csp->http->host))
2089 log_ssl_errors(LOG_LEVEL_ERROR,
2090 "Setting the Subject Alt Name extension failed");
2095 if (!X509_sign(cert, loaded_issuer_key, EVP_sha256()))
2097 log_ssl_errors(LOG_LEVEL_ERROR, "Signing certificate failed");
2103 * Writing certificate into file
2105 if (write_certificate(cert, cert_opt.output_file) < 0)
2107 log_error(LOG_LEVEL_ERROR, "Writing certificate into file failed");
2116 * Freeing used structures
2120 X509_free(issuer_cert);
2126 if (pk_bio && !BIO_free(pk_bio))
2128 log_ssl_errors(LOG_LEVEL_ERROR, "Error closing pk BIO");
2130 if (loaded_subject_key)
2132 EVP_PKEY_free(loaded_subject_key);
2134 if (loaded_issuer_key)
2136 EVP_PKEY_free(loaded_issuer_key);
2140 X509_NAME_free(subject_name);
2144 ASN1_TIME_free(asn_time);
2148 BN_free(serial_num);
2152 ASN1_INTEGER_free(serial);
2154 freez(cert_opt.subject_key);
2155 freez(cert_opt.output_file);
2162 /*********************************************************************
2164 * Function : ssl_crt_verify_info
2166 * Description : Returns an informational string about the verification
2167 * status of a certificate.
2170 * 1 : buf = Buffer to write to
2171 * 2 : size = Maximum size of buffer
2172 * 3 : csp = client state
2176 *********************************************************************/
2177 extern void ssl_crt_verify_info(char *buf, size_t size, struct client_state *csp)
2179 strncpy(buf, X509_verify_cert_error_string(csp->server_cert_verification_result), size);
2184 /*********************************************************************
2186 * Function : ssl_release
2188 * Description : Release all SSL resources
2194 *********************************************************************/
2195 extern void ssl_release(void)
2197 if (ssl_inited == 1)
2199 #ifndef OPENSSL_NO_COMP
2200 SSL_COMP_free_compression_methods();
2202 CONF_modules_free();
2203 CONF_modules_unload(1);
2204 #ifndef OPENSSL_NO_COMP
2205 COMP_zlib_cleanup();
2211 CRYPTO_cleanup_all_ex_data();