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 *cert_file = NULL;
743 * Initializing OpenSSL structures for TLS/SSL connection
748 * Preparing hash of host for creating certificates
750 ret = host_to_hash(csp);
753 log_error(LOG_LEVEL_ERROR, "Generating hash of host failed: %d", ret);
759 * Preparing paths to certificates files and key file
761 cert_file = make_certs_path(csp->config->certificate_directory,
762 (const char *)csp->http->hash_of_host_hex, CERT_FILE_TYPE);
763 key_file = make_certs_path(csp->config->certificate_directory,
764 (const char *)csp->http->hash_of_host_hex, KEY_FILE_TYPE);
766 if (cert_file == NULL || key_file == NULL)
773 * Generating certificate for requested host. Mutex to prevent
774 * certificate and key inconsistence must be locked.
776 privoxy_mutex_lock(&certificate_mutex);
778 ret = generate_webpage_certificate(csp);
781 log_error(LOG_LEVEL_ERROR,
782 "Generate_webpage_certificate failed: %d", ret);
783 privoxy_mutex_unlock(&certificate_mutex);
787 privoxy_mutex_unlock(&certificate_mutex);
789 if (!(ssl_attr->openssl_attr.ctx = SSL_CTX_new(SSLv23_server_method())))
791 log_ssl_errors(LOG_LEVEL_ERROR, "Unable to create SSL context");
796 /* Set the key and cert */
797 if (SSL_CTX_use_certificate_file(ssl_attr->openssl_attr.ctx,
798 cert_file, SSL_FILETYPE_PEM) != 1)
800 log_ssl_errors(LOG_LEVEL_ERROR,
801 "Loading webpage certificate %s failed", cert_file);
806 if (SSL_CTX_use_PrivateKey_file(ssl_attr->openssl_attr.ctx,
807 key_file, SSL_FILETYPE_PEM) != 1)
809 log_ssl_errors(LOG_LEVEL_ERROR,
810 "Loading webpage certificate private key %s failed", key_file);
815 SSL_CTX_set_options(ssl_attr->openssl_attr.ctx, SSL_OP_NO_SSLv3);
817 if (!(ssl_attr->openssl_attr.bio = BIO_new_ssl(ssl_attr->openssl_attr.ctx, 0)))
819 log_ssl_errors(LOG_LEVEL_ERROR, "Unable to create BIO structure");
824 if (BIO_get_ssl(ssl_attr->openssl_attr.bio, &ssl) != 1)
826 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_get_ssl failed");
831 if (!SSL_set_fd(ssl, csp->cfd))
833 log_ssl_errors(LOG_LEVEL_ERROR, "SSL_set_fd failed");
838 if (csp->config->cipher_list != NULL)
840 if (!SSL_set_cipher_list(ssl, csp->config->cipher_list))
842 log_ssl_errors(LOG_LEVEL_ERROR,
843 "Setting the cipher list '%s' for the client connection failed",
844 csp->config->cipher_list);
851 * Handshake with client
853 log_error(LOG_LEVEL_CONNECT,
854 "Performing the TLS/SSL handshake with client. Hash of host: %s",
855 csp->http->hash_of_host_hex);
856 if (BIO_do_handshake(ssl_attr->openssl_attr.bio) != 1)
858 log_ssl_errors(LOG_LEVEL_ERROR,
859 "The TLS/SSL handshake with the client failed");
864 log_error(LOG_LEVEL_CONNECT, "Client successfully connected over TLS/SSL");
865 csp->ssl_with_client_is_opened = 1;
870 * Freeing allocated paths to files
875 /* Freeing structures if connection wasn't created successfully */
878 free_client_ssl_structures(csp);
884 /*********************************************************************
886 * Function : close_client_ssl_connection
888 * Description : Closes TLS/SSL connection with client. This function
889 * checks if this connection is already created.
892 * 1 : csp = Current client state (buffers, headers, etc...)
896 *********************************************************************/
897 extern void close_client_ssl_connection(struct client_state *csp)
899 struct ssl_attr *ssl_attr = &csp->ssl_client_attr;
902 if (csp->ssl_with_client_is_opened == 0)
908 * Notifying the peer that the connection is being closed.
910 BIO_ssl_shutdown(ssl_attr->openssl_attr.bio);
911 if (BIO_get_ssl(ssl_attr->openssl_attr.bio, &ssl) != 1)
913 log_ssl_errors(LOG_LEVEL_ERROR,
914 "BIO_get_ssl() failed in close_client_ssl_connection()");
919 * Pretend we received a shutdown alert so
920 * the BIO_free_all() call later on returns
923 SSL_set_shutdown(ssl, SSL_RECEIVED_SHUTDOWN);
925 free_client_ssl_structures(csp);
926 csp->ssl_with_client_is_opened = 0;
930 /*********************************************************************
932 * Function : free_client_ssl_structures
934 * Description : Frees structures used for SSL communication with
938 * 1 : csp = Current client state (buffers, headers, etc...)
942 *********************************************************************/
943 static void free_client_ssl_structures(struct client_state *csp)
945 struct ssl_attr *ssl_attr = &csp->ssl_client_attr;
947 if (ssl_attr->openssl_attr.bio)
949 BIO_free_all(ssl_attr->openssl_attr.bio);
951 if (ssl_attr->openssl_attr.ctx)
953 SSL_CTX_free(ssl_attr->openssl_attr.ctx);
958 /*********************************************************************
960 * Function : close_server_ssl_connection
962 * Description : Closes TLS/SSL connection with server. This function
963 * checks if this connection is already opened.
966 * 1 : csp = Current client state (buffers, headers, etc...)
970 *********************************************************************/
971 extern void close_server_ssl_connection(struct client_state *csp)
973 struct ssl_attr *ssl_attr = &csp->ssl_server_attr;
976 if (csp->ssl_with_server_is_opened == 0)
982 * Notifying the peer that the connection is being closed.
984 BIO_ssl_shutdown(ssl_attr->openssl_attr.bio);
985 if (BIO_get_ssl(ssl_attr->openssl_attr.bio, &ssl) != 1)
987 log_ssl_errors(LOG_LEVEL_ERROR,
988 "BIO_get_ssl() failed in close_server_ssl_connection()");
993 * Pretend we received a shutdown alert so
994 * the BIO_free_all() call later on returns
997 SSL_set_shutdown(ssl, SSL_RECEIVED_SHUTDOWN);
999 free_server_ssl_structures(csp);
1000 csp->ssl_with_server_is_opened = 0;
1004 /*********************************************************************
1006 * Function : create_server_ssl_connection
1008 * Description : Creates TLS/SSL secured connection with server.
1011 * 1 : csp = Current client state (buffers, headers, etc...)
1013 * Returns : 0 on success, negative value if connection wasn't created
1016 *********************************************************************/
1017 extern int create_server_ssl_connection(struct client_state *csp)
1019 openssl_connection_attr *ssl_attrs = &csp->ssl_server_attr.openssl_attr;
1021 char *trusted_cas_file = NULL;
1022 STACK_OF(X509) *chain;
1025 csp->server_cert_verification_result = SSL_CERT_NOT_VERIFIED;
1026 csp->server_certs_chain.next = NULL;
1028 /* Setting path to file with trusted CAs */
1029 trusted_cas_file = csp->config->trusted_cas_file;
1031 ssl_attrs->ctx = SSL_CTX_new(SSLv23_method());
1032 if (!ssl_attrs->ctx)
1034 log_ssl_errors(LOG_LEVEL_ERROR, "SSL context creation failed");
1040 * Loading file with trusted CAs
1042 if (!SSL_CTX_load_verify_locations(ssl_attrs->ctx, trusted_cas_file, NULL))
1044 log_ssl_errors(LOG_LEVEL_ERROR, "Loading trusted CAs file %s failed",
1050 SSL_CTX_set_verify(ssl_attrs->ctx, SSL_VERIFY_NONE, NULL);
1051 SSL_CTX_set_options(ssl_attrs->ctx, SSL_OP_NO_SSLv3);
1053 if (!(ssl_attrs->bio = BIO_new_ssl(ssl_attrs->ctx, 1)))
1055 log_ssl_errors(LOG_LEVEL_ERROR, "Unable to create BIO structure");
1060 if (BIO_get_ssl(ssl_attrs->bio, &ssl) != 1)
1062 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_get_ssl failed");
1067 if (!SSL_set_fd(ssl, csp->server_connection.sfd))
1069 log_ssl_errors(LOG_LEVEL_ERROR, "SSL_set_fd failed");
1074 if (csp->config->cipher_list != NULL)
1076 if (!SSL_set_cipher_list(ssl, csp->config->cipher_list))
1078 log_ssl_errors(LOG_LEVEL_ERROR,
1079 "Setting the cipher list '%s' for the server connection failed",
1080 csp->config->cipher_list);
1087 * Set the hostname to check against the received server certificate
1089 #if OPENSSL_VERSION_NUMBER > 0x10100000L
1090 if (!SSL_set1_host(ssl, csp->http->host))
1092 log_ssl_errors(LOG_LEVEL_ERROR, "SSL_set1_host failed");
1097 if (host_is_ip_address(csp->http->host))
1099 if (X509_VERIFY_PARAM_set1_ip_asc(ssl->param, csp->http->host) != 1)
1101 log_ssl_errors(LOG_LEVEL_ERROR,
1102 "X509_VERIFY_PARAM_set1_ip_asc() failed");
1109 if (X509_VERIFY_PARAM_set1_host(ssl->param, csp->http->host, 0) != 1)
1111 log_ssl_errors(LOG_LEVEL_ERROR,
1112 "X509_VERIFY_PARAM_set1_host() failed");
1119 if (!SSL_set_tlsext_host_name(ssl, csp->http->host))
1121 log_ssl_errors(LOG_LEVEL_ERROR, "SSL_set_tlsext_host_name failed");
1127 * Handshake with server
1129 log_error(LOG_LEVEL_CONNECT,
1130 "Performing the TLS/SSL handshake with the server");
1132 if (BIO_do_handshake(ssl_attrs->bio) != 1)
1134 log_ssl_errors(LOG_LEVEL_ERROR,
1135 "The TLS/SSL handshake with the server failed");
1140 chain = SSL_get_peer_cert_chain(ssl);
1143 for (int i = 0; i < sk_X509_num(chain); i++)
1145 if (ssl_store_cert(csp, sk_X509_value(chain, i)) != 0)
1147 log_error(LOG_LEVEL_ERROR, "ssl_store_cert failed");
1154 if (!csp->dont_verify_certificate)
1156 long verify_result = SSL_get_verify_result(ssl);
1157 if (verify_result == X509_V_OK)
1160 csp->server_cert_verification_result = SSL_CERT_VALID;
1164 csp->server_cert_verification_result = verify_result;
1165 log_error(LOG_LEVEL_ERROR,
1166 "X509 certificate verification for %s failed: %s",
1167 csp->http->hostport, X509_verify_cert_error_string(verify_result));
1173 log_error(LOG_LEVEL_CONNECT, "Server successfully connected over TLS/SSL");
1176 * Server certificate chain is valid, so we can clean
1177 * chain, because we will not send it to client.
1179 free_certificate_chain(csp);
1181 csp->ssl_with_server_is_opened = 1;
1183 /* Freeing structures if connection wasn't created successfully */
1186 free_server_ssl_structures(csp);
1193 /*********************************************************************
1195 * Function : free_server_ssl_structures
1197 * Description : Frees structures used for SSL communication with server
1200 * 1 : csp = Current client state (buffers, headers, etc...)
1204 *********************************************************************/
1205 static void free_server_ssl_structures(struct client_state *csp)
1207 struct ssl_attr *ssl_attr = &csp->ssl_server_attr;
1209 if (ssl_attr->openssl_attr.bio)
1211 BIO_free_all(ssl_attr->openssl_attr.bio);
1213 if (ssl_attr->openssl_attr.ctx)
1215 SSL_CTX_free(ssl_attr->openssl_attr.ctx);
1220 /*********************************************************************
1222 * Function : log_ssl_errors
1224 * Description : Log SSL errors
1227 * 1 : debuglevel = Debug level
1228 * 2 : desc = Error description
1232 *********************************************************************/
1233 static void log_ssl_errors(int debuglevel, const char* fmt, ...)
1235 unsigned long err_code;
1236 char prefix[ERROR_BUF_SIZE];
1238 va_start(args, fmt);
1239 vsnprintf(prefix, sizeof(prefix), fmt, args);
1242 while ((err_code = ERR_get_error()))
1244 char err_buf[ERROR_BUF_SIZE];
1246 ERR_error_string_n(err_code, err_buf, sizeof(err_buf));
1247 log_error(debuglevel, "%s: %s", prefix, err_buf);
1251 * In case if called by mistake and there were
1252 * no TLS/SSL errors let's report it to the log.
1256 log_error(debuglevel, "%s: no TLS/SSL errors detected", prefix);
1261 /*********************************************************************
1263 * Function : ssl_base64_encode
1265 * Description : Encode a buffer into base64 format.
1268 * 1 : dst = Destination buffer
1269 * 2 : dlen = Destination buffer length
1270 * 3 : olen = Number of bytes written
1271 * 4 : src = Source buffer
1272 * 5 : slen = Amount of data to be encoded
1274 * Returns : 0 on success, error code othervise
1276 *********************************************************************/
1277 extern int ssl_base64_encode(unsigned char *dst, size_t dlen, size_t *olen,
1278 const unsigned char *src, size_t slen)
1280 *olen = 4 * ((slen/3) + ((slen%3) ? 1 : 0)) + 1;
1285 *olen = (size_t)EVP_EncodeBlock(dst, src, (int)slen) + 1;
1290 /*********************************************************************
1292 * Function : close_file_stream
1294 * Description : Close file stream, report error on close error
1297 * 1 : f = file stream to close
1298 * 2 : path = path for error report
1302 *********************************************************************/
1303 static void close_file_stream(FILE *f, const char *path)
1307 log_error(LOG_LEVEL_ERROR,
1308 "Error closing file %s: %s", path, strerror(errno));
1313 /*********************************************************************
1315 * Function : write_certificate
1317 * Description : Writes certificate into file.
1320 * 1 : crt = certificate to write into file
1321 * 2 : output_file = path to save certificate file
1324 * Returns : 1 on success success or negative value
1326 *********************************************************************/
1327 static int write_certificate(X509 *crt, const char *output_file)
1333 * Saving certificate into file
1335 if ((f = fopen(output_file, "w")) == NULL)
1337 log_error(LOG_LEVEL_ERROR, "Opening file %s to save certificate failed",
1342 ret = PEM_write_X509(f, crt);
1345 log_ssl_errors(LOG_LEVEL_ERROR,
1346 "Writing certificate into file %s failed", output_file);
1350 close_file_stream(f, output_file);
1355 /*********************************************************************
1357 * Function : write_private_key
1359 * Description : Writes private key into file and copies saved
1360 * content into given pointer to string. If function
1361 * returns 0 for success, this copy must be freed by
1365 * 1 : key = key to write into file
1366 * 2 : ret_buf = pointer to string with created key file content
1367 * 3 : key_file_path = path where to save key file
1369 * Returns : Length of written private key on success or negative value
1372 *********************************************************************/
1373 static int write_private_key(EVP_PKEY *key, char **ret_buf,
1374 const char *key_file_path)
1376 size_t len = 0; /* Length of created key */
1377 FILE *f = NULL; /* File to save certificate */
1379 BIO *bio_mem = BIO_new(BIO_s_mem());
1380 char *bio_mem_data = 0;
1382 if (bio_mem == NULL)
1384 log_ssl_errors(LOG_LEVEL_ERROR, "write_private_key memory allocation failure");
1389 * Writing private key into PEM string
1391 if (!PEM_write_bio_PrivateKey(bio_mem, key, NULL, NULL, 0, NULL, NULL))
1393 log_ssl_errors(LOG_LEVEL_ERROR,
1394 "Writing private key into PEM string failed");
1399 len = (size_t)BIO_get_mem_data(bio_mem, &bio_mem_data);
1401 /* Initializing buffer for key file content */
1402 *ret_buf = zalloc_or_die(len + 1);
1403 (*ret_buf)[len] = 0;
1405 strncpy(*ret_buf, bio_mem_data, len);
1408 * Saving key into file
1410 if ((f = fopen(key_file_path, "wb")) == NULL)
1412 log_error(LOG_LEVEL_ERROR,
1413 "Opening file %s to save private key failed: %E",
1419 if (fwrite(*ret_buf, 1, len, f) != len)
1421 log_error(LOG_LEVEL_ERROR,
1422 "Writing private key into file %s failed",
1424 close_file_stream(f, key_file_path);
1429 close_file_stream(f, key_file_path);
1443 /*********************************************************************
1445 * Function : generate_key
1447 * Description : Tests if private key for host saved in csp already
1448 * exists. If this file doesn't exists, a new key is
1449 * generated and saved in a file. The generated key is also
1450 * copied into given parameter key_buf, which must be then
1451 * freed by caller. If file with key exists, key_buf
1452 * contain NULL and no private key is generated.
1455 * 1 : csp = Current client state (buffers, headers, etc...)
1456 * 2 : key_buf = buffer to save new generated key
1458 * Returns : -1 => Error while generating private key
1459 * 0 => Key already exists
1460 * >0 => Length of generated private key
1462 *********************************************************************/
1463 static int generate_key(struct client_state *csp, char **key_buf)
1466 char* key_file_path = NULL;
1467 BIGNUM *exp = BN_new();
1468 RSA *rsa = RSA_new();
1469 EVP_PKEY *key = EVP_PKEY_new();
1471 if (exp == NULL || rsa == NULL || key == NULL)
1473 log_ssl_errors(LOG_LEVEL_ERROR, "RSA key memory allocation failure");
1478 if (BN_set_word(exp, RSA_KEY_PUBLIC_EXPONENT) != 1)
1480 log_ssl_errors(LOG_LEVEL_ERROR, "Setting RSA key exponent failed");
1485 key_file_path = make_certs_path(csp->config->certificate_directory,
1486 (char *)csp->http->hash_of_host_hex, KEY_FILE_TYPE);
1487 if (key_file_path == NULL)
1494 * Test if key already exists. If so, we don't have to create it again.
1496 if (file_exists(key_file_path) == 1)
1502 ret = RSA_generate_key_ex(rsa, RSA_KEYSIZE, exp, NULL);
1505 log_ssl_errors(LOG_LEVEL_ERROR, "RSA key generation failure");
1510 if (!EVP_PKEY_set1_RSA(key, rsa))
1512 log_ssl_errors(LOG_LEVEL_ERROR,
1513 "Error assigning RSA key pair to PKEY structure");
1519 * Exporting private key into file
1521 if ((ret = write_private_key(key, key_buf, key_file_path)) < 0)
1523 log_error(LOG_LEVEL_ERROR,
1524 "Writing private key into file %s failed", key_file_path);
1531 * Freeing used variables
1545 freez(key_file_path);
1551 /*********************************************************************
1553 * Function : ssl_certificate_load
1555 * Description : Loads certificate from file.
1558 * 1 : cert_path = The certificate path to load
1560 * Returns : NULL => error loading certificate,
1561 * pointer to certificate instance otherwise
1563 *********************************************************************/
1564 static X509* ssl_certificate_load(const char *cert_path)
1567 FILE *cert_f = NULL;
1569 if (!(cert_f = fopen(cert_path, "r")))
1571 log_error(LOG_LEVEL_ERROR,
1572 "Error opening certificate file %s: %s", cert_path, strerror(errno));
1576 if (!(cert = PEM_read_X509(cert_f, NULL, NULL, NULL)))
1578 log_ssl_errors(LOG_LEVEL_ERROR,
1579 "Error reading certificate file %s", cert_path);
1582 close_file_stream(cert_f, cert_path);
1587 /*********************************************************************
1589 * Function : ssl_certificate_is_invalid
1591 * Description : Checks whether or not a certificate is valid.
1592 * Currently only checks that the certificate can be
1593 * parsed and that the "valid to" date is in the future.
1596 * 1 : cert_file = The certificate to check
1598 * Returns : 0 => The certificate is valid.
1599 * 1 => The certificate is invalid
1601 *********************************************************************/
1602 static int ssl_certificate_is_invalid(const char *cert_file)
1608 if (!(cert = ssl_certificate_load(cert_file)))
1610 log_ssl_errors(LOG_LEVEL_ERROR,
1611 "Error reading certificate file %s", cert_file);
1615 ret = X509_cmp_current_time(X509_get_notAfter(cert));
1618 log_ssl_errors(LOG_LEVEL_ERROR,
1619 "Error checking certificate %s validity", cert_file);
1625 return ret == -1 ? 1 : 0;
1629 /*********************************************************************
1631 * Function : set_x509_ext
1633 * Description : Sets the X509V3 extension data
1636 * 1 : cert = The certificate to modify
1637 * 2 : issuer = Issuer certificate
1638 * 3 : nid = OpenSSL NID
1639 * 4 : value = extension value
1641 * Returns : 0 => Error while setting extensuon data
1644 *********************************************************************/
1645 static int set_x509_ext(X509 *cert, X509 *issuer, int nid, char *value)
1647 X509_EXTENSION *ext = NULL;
1651 X509V3_set_ctx(&ctx, issuer, cert, NULL, NULL, 0);
1652 ext = X509V3_EXT_conf_nid(NULL, &ctx, nid, value);
1655 log_ssl_errors(LOG_LEVEL_ERROR, "X509V3_EXT_conf_nid failure");
1659 if (!X509_add_ext(cert, ext, -1))
1661 log_ssl_errors(LOG_LEVEL_ERROR, "X509_add_ext failure");
1669 X509_EXTENSION_free(ext);
1675 /*********************************************************************
1677 * Function : set_subject_alternative_name
1679 * Description : Sets the Subject Alternative Name extension to a cert
1682 * 1 : cert = The certificate to modify
1683 * 2 : issuer = Issuer certificate
1684 * 3 : hostname = The hostname to add
1686 * Returns : 0 => Error while creating certificate.
1689 *********************************************************************/
1690 static int set_subject_alternative_name(X509 *cert, X509 *issuer, const char *hostname)
1692 size_t altname_len = strlen(hostname) + sizeof(CERTIFICATE_ALT_NAME_PREFIX);
1693 char alt_name_buf[altname_len];
1695 snprintf(alt_name_buf, sizeof(alt_name_buf),
1696 CERTIFICATE_ALT_NAME_PREFIX"%s", hostname);
1697 return set_x509_ext(cert, issuer, NID_subject_alt_name, alt_name_buf);
1701 /*********************************************************************
1703 * Function : generate_webpage_certificate
1705 * Description : Creates certificate file in presetted directory.
1706 * If certificate already exists, no other certificate
1707 * will be created. Subject of certificate is named
1708 * by csp->http->host from parameter. This function also
1709 * triggers generating of private key for new certificate.
1712 * 1 : csp = Current client state (buffers, headers, etc...)
1714 * Returns : -1 => Error while creating certificate.
1715 * 0 => Certificate already exists.
1716 * 1 => Certificate created
1718 *********************************************************************/
1719 static int generate_webpage_certificate(struct client_state *csp)
1721 char *key_buf = NULL; /* Buffer for created key */
1722 X509 *issuer_cert = NULL;
1725 EVP_PKEY *loaded_subject_key = NULL;
1726 EVP_PKEY *loaded_issuer_key = NULL;
1727 X509_NAME *issuer_name;
1728 X509_NAME *subject_name = NULL;
1729 ASN1_TIME *asn_time = NULL;
1730 ASN1_INTEGER *serial = NULL;
1731 BIGNUM *serial_num = NULL;
1734 cert_options cert_opt;
1735 char cert_valid_from[VALID_DATETIME_BUFLEN];
1736 char cert_valid_to[VALID_DATETIME_BUFLEN];
1738 /* Paths to keys and certificates needed to create certificate */
1739 cert_opt.issuer_key = NULL;
1740 cert_opt.subject_key = NULL;
1741 cert_opt.issuer_crt = NULL;
1743 cert_opt.output_file = make_certs_path(csp->config->certificate_directory,
1744 (const char *)csp->http->hash_of_host_hex, CERT_FILE_TYPE);
1745 if (cert_opt.output_file == NULL)
1750 cert_opt.subject_key = make_certs_path(csp->config->certificate_directory,
1751 (const char *)csp->http->hash_of_host_hex, KEY_FILE_TYPE);
1752 if (cert_opt.subject_key == NULL)
1754 freez(cert_opt.output_file);
1758 if (file_exists(cert_opt.output_file) == 1)
1760 /* The file exists, but is it valid? */
1761 if (ssl_certificate_is_invalid(cert_opt.output_file))
1763 log_error(LOG_LEVEL_CONNECT,
1764 "Certificate %s is no longer valid. Removing it.",
1765 cert_opt.output_file);
1766 if (unlink(cert_opt.output_file))
1768 log_error(LOG_LEVEL_ERROR, "Failed to unlink %s: %E",
1769 cert_opt.output_file);
1771 freez(cert_opt.output_file);
1772 freez(cert_opt.subject_key);
1776 if (unlink(cert_opt.subject_key))
1778 log_error(LOG_LEVEL_ERROR, "Failed to unlink %s: %E",
1779 cert_opt.subject_key);
1781 freez(cert_opt.output_file);
1782 freez(cert_opt.subject_key);
1789 freez(cert_opt.output_file);
1790 freez(cert_opt.subject_key);
1797 * Create key for requested host
1799 int subject_key_len = generate_key(csp, &key_buf);
1800 if (subject_key_len < 0)
1802 freez(cert_opt.output_file);
1803 freez(cert_opt.subject_key);
1804 log_error(LOG_LEVEL_ERROR, "Key generating failed");
1809 * Converting unsigned long serial number to char * serial number.
1810 * We must compute length of serial number in string + terminating null.
1812 unsigned long certificate_serial = get_certificate_serial(csp);
1813 unsigned long certificate_serial_time = (unsigned long)time(NULL);
1814 int serial_num_size = snprintf(NULL, 0, "%lu%lu",
1815 certificate_serial_time, certificate_serial) + 1;
1816 if (serial_num_size <= 0)
1818 serial_num_size = 1;
1821 char serial_num_text[serial_num_size]; /* Buffer for serial number */
1822 ret = snprintf(serial_num_text, (size_t)serial_num_size, "%lu%lu",
1823 certificate_serial_time, certificate_serial);
1824 if (ret < 0 || ret >= serial_num_size)
1826 log_error(LOG_LEVEL_ERROR,
1827 "Converting certificate serial number into string failed");
1833 * Preparing parameters for certificate
1835 subject_name = X509_NAME_new();
1838 log_ssl_errors(LOG_LEVEL_ERROR, "RSA key memory allocation failure");
1843 if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_COMMON_NAME_FCODE,
1844 MBSTRING_ASC, (void *)csp->http->host, -1, -1, 0))
1846 log_ssl_errors(LOG_LEVEL_ERROR,
1847 "X509 subject name (code: %s, val: %s) error",
1848 CERT_PARAM_COMMON_NAME_FCODE, csp->http->host);
1852 if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_ORGANIZATION_FCODE,
1853 MBSTRING_ASC, (void *)csp->http->host, -1, -1, 0))
1855 log_ssl_errors(LOG_LEVEL_ERROR,
1856 "X509 subject name (code: %s, val: %s) error",
1857 CERT_PARAM_ORGANIZATION_FCODE, csp->http->host);
1861 if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_ORG_UNIT_FCODE,
1862 MBSTRING_ASC, (void *)csp->http->host, -1, -1, 0))
1864 log_ssl_errors(LOG_LEVEL_ERROR,
1865 "X509 subject name (code: %s, val: %s) error",
1866 CERT_PARAM_ORG_UNIT_FCODE, csp->http->host);
1870 if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_COUNTRY_FCODE,
1871 MBSTRING_ASC, (void *)CERT_PARAM_COUNTRY_CODE, -1, -1, 0))
1873 log_ssl_errors(LOG_LEVEL_ERROR,
1874 "X509 subject name (code: %s, val: %s) error",
1875 CERT_PARAM_COUNTRY_FCODE, csp->http->host);
1880 cert_opt.issuer_crt = csp->config->ca_cert_file;
1881 cert_opt.issuer_key = csp->config->ca_key_file;
1883 if (get_certificate_valid_from_date(cert_valid_from,
1884 sizeof(cert_valid_from), VALID_DATETIME_FMT)
1885 || get_certificate_valid_to_date(cert_valid_to,
1886 sizeof(cert_valid_to), VALID_DATETIME_FMT))
1888 log_error(LOG_LEVEL_ERROR, "Generating one of the validity dates failed");
1893 cert_opt.subject_pwd = CERT_SUBJECT_PASSWORD;
1894 cert_opt.issuer_pwd = csp->config->ca_password;
1895 cert_opt.not_before = cert_valid_from;
1896 cert_opt.not_after = cert_valid_to;
1897 cert_opt.serial = serial_num_text;
1898 cert_opt.max_pathlen = -1;
1901 * Test if the private key was already created.
1902 * XXX: Can this still happen?
1904 if (subject_key_len == 0)
1906 log_error(LOG_LEVEL_ERROR, "Subject key was already created");
1912 * Parse serial to MPI
1914 serial_num = BN_new();
1917 log_error(LOG_LEVEL_ERROR, "generate_webpage_certificate: memory error");
1921 if (!BN_dec2bn(&serial_num, cert_opt.serial))
1923 log_ssl_errors(LOG_LEVEL_ERROR, "Failed to parse serial %s", cert_opt.serial);
1928 if (!(serial = BN_to_ASN1_INTEGER(serial_num, NULL)))
1930 log_ssl_errors(LOG_LEVEL_ERROR, "Failed to generate serial ASN1 representation");
1936 * Loading certificates
1938 if (!(issuer_cert = ssl_certificate_load(cert_opt.issuer_crt)))
1940 log_error(LOG_LEVEL_ERROR, "Loading issuer certificate %s failed",
1941 cert_opt.issuer_crt);
1946 issuer_name = X509_get_issuer_name(issuer_cert);
1949 * Loading keys from file or from buffer
1951 if (key_buf != NULL && subject_key_len > 0)
1953 pk_bio = BIO_new_mem_buf(key_buf, subject_key_len);
1955 else if (!(pk_bio = BIO_new_file(cert_opt.subject_key, "r")))
1957 log_ssl_errors(LOG_LEVEL_ERROR,
1958 "Failure opening subject key %s BIO", cert_opt.subject_key);
1963 loaded_subject_key = PEM_read_bio_PrivateKey(pk_bio, NULL, NULL,
1964 (void *)cert_opt.subject_pwd);
1965 if (!loaded_subject_key)
1967 log_ssl_errors(LOG_LEVEL_ERROR, "Parsing subject key %s failed",
1968 cert_opt.subject_key);
1973 if (!BIO_free(pk_bio))
1975 log_ssl_errors(LOG_LEVEL_ERROR, "Error closing subject key BIO");
1978 if (!(pk_bio = BIO_new_file(cert_opt.issuer_key, "r")))
1980 log_ssl_errors(LOG_LEVEL_ERROR, "Failure opening issuer key %s BIO",
1981 cert_opt.issuer_key);
1986 loaded_issuer_key = PEM_read_bio_PrivateKey(pk_bio, NULL, NULL,
1987 (void *)cert_opt.issuer_pwd);
1988 if (!loaded_issuer_key)
1990 log_ssl_errors(LOG_LEVEL_ERROR, "Parsing issuer key %s failed",
1991 cert_opt.subject_key);
1999 log_ssl_errors(LOG_LEVEL_ERROR, "Certificate allocation error");
2004 if (!X509_set_version(cert, CERTIFICATE_VERSION))
2006 log_ssl_errors(LOG_LEVEL_ERROR, "X509_set_version failed");
2012 * Setting parameters of signed certificate
2014 if (!X509_set_pubkey(cert, loaded_subject_key))
2016 log_ssl_errors(LOG_LEVEL_ERROR,
2017 "Setting public key in signed certificate failed");
2022 if (!X509_set_subject_name(cert, subject_name))
2024 log_ssl_errors(LOG_LEVEL_ERROR,
2025 "Setting subject name in signed certificate failed");
2030 if (!X509_set_issuer_name(cert, issuer_name))
2032 log_ssl_errors(LOG_LEVEL_ERROR,
2033 "Setting issuer name in signed certificate failed");
2038 if (!X509_set_serialNumber(cert, serial))
2040 log_ssl_errors(LOG_LEVEL_ERROR,
2041 "Setting serial number in signed certificate failed");
2046 asn_time = ASN1_TIME_new();
2049 log_ssl_errors(LOG_LEVEL_ERROR, "ASN1 time memory allocation failure");
2054 if (!ASN1_TIME_set_string(asn_time, cert_opt.not_after))
2056 log_ssl_errors(LOG_LEVEL_ERROR, "ASN1 time [%s] encode error", cert_opt.not_after);
2061 if (!X509_set1_notAfter(cert, asn_time))
2063 log_ssl_errors(LOG_LEVEL_ERROR,
2064 "Setting valid not after in signed certificate failed");
2069 if (!ASN1_TIME_set_string(asn_time, cert_opt.not_before))
2071 log_ssl_errors(LOG_LEVEL_ERROR, "ASN1 time encode error");
2076 if (!X509_set1_notBefore(cert, asn_time))
2078 log_ssl_errors(LOG_LEVEL_ERROR,
2079 "Setting valid not before in signed certificate failed");
2084 if (!set_x509_ext(cert, issuer_cert, NID_basic_constraints, CERTIFICATE_BASIC_CONSTRAINTS))
2086 log_ssl_errors(LOG_LEVEL_ERROR, "Setting the basicConstraints extension "
2087 "in signed certificate failed");
2092 if (!set_x509_ext(cert, issuer_cert, NID_subject_key_identifier, CERTIFICATE_SUBJECT_KEY))
2094 log_ssl_errors(LOG_LEVEL_ERROR,
2095 "Setting the Subject Key Identifier extension failed");
2100 if (!set_x509_ext(cert, issuer_cert, NID_authority_key_identifier, CERTIFICATE_AUTHORITY_KEY))
2102 log_ssl_errors(LOG_LEVEL_ERROR,
2103 "Setting the Authority Key Identifier extension failed");
2108 if (!host_is_ip_address(csp->http->host) &&
2109 !set_subject_alternative_name(cert, issuer_cert, csp->http->host))
2111 log_ssl_errors(LOG_LEVEL_ERROR,
2112 "Setting the Subject Alt Name extension failed");
2117 if (!X509_sign(cert, loaded_issuer_key, EVP_sha256()))
2119 log_ssl_errors(LOG_LEVEL_ERROR, "Signing certificate failed");
2125 * Writing certificate into file
2127 if (write_certificate(cert, cert_opt.output_file) < 0)
2129 log_error(LOG_LEVEL_ERROR, "Writing certificate into file failed");
2138 * Freeing used structures
2142 X509_free(issuer_cert);
2148 if (pk_bio && !BIO_free(pk_bio))
2150 log_ssl_errors(LOG_LEVEL_ERROR, "Error closing pk BIO");
2152 if (loaded_subject_key)
2154 EVP_PKEY_free(loaded_subject_key);
2156 if (loaded_issuer_key)
2158 EVP_PKEY_free(loaded_issuer_key);
2162 X509_NAME_free(subject_name);
2166 ASN1_TIME_free(asn_time);
2170 BN_free(serial_num);
2174 ASN1_INTEGER_free(serial);
2176 freez(cert_opt.subject_key);
2177 freez(cert_opt.output_file);
2184 /*********************************************************************
2186 * Function : ssl_crt_verify_info
2188 * Description : Returns an informational string about the verification
2189 * status of a certificate.
2192 * 1 : buf = Buffer to write to
2193 * 2 : size = Maximum size of buffer
2194 * 3 : csp = client state
2198 *********************************************************************/
2199 extern void ssl_crt_verify_info(char *buf, size_t size, struct client_state *csp)
2201 strncpy(buf, X509_verify_cert_error_string(csp->server_cert_verification_result), size);
2206 /*********************************************************************
2208 * Function : ssl_release
2210 * Description : Release all SSL resources
2216 *********************************************************************/
2217 extern void ssl_release(void)
2219 if (ssl_inited == 1)
2221 #ifndef OPENSSL_NO_COMP
2222 SSL_COMP_free_compression_methods();
2224 CONF_modules_free();
2225 CONF_modules_unload(1);
2226 #ifndef OPENSSL_NO_COMP
2227 COMP_zlib_cleanup();
2233 CRYPTO_cleanup_all_ex_data();