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_host_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));
232 if (BIO_get_ssl(bio, &ssl) == 1)
234 fd = SSL_get_fd(ssl);
239 log_ssl_errors(LOG_LEVEL_ERROR,
240 "Receiving data on socket %d over TLS/SSL failed", fd);
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_bio_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");
400 if (bs->type == V_ASN1_NEG_INTEGER)
402 if (BIO_puts(bio, " (Negative)") < 0)
404 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_puts() for serial failed");
409 for (i = 0; i < bs->length; i++)
411 if (BIO_printf(bio, "%02x%c", bs->data[i],
412 ((i + 1 == bs->length) ? '\n' : ':')) <= 0)
414 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_printf() for serial failed");
421 if (BIO_puts(bio, "issuer name : ") <= 0)
423 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_puts() for issuer failed");
427 if (X509_NAME_print_ex(bio, X509_get_issuer_name(crt), 0, 0) < 0)
429 log_ssl_errors(LOG_LEVEL_ERROR, "X509_NAME_print_ex() for issuer failed");
434 if (BIO_puts(bio, "\nsubject name : ") <= 0)
436 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_puts() for subject failed");
440 if (X509_NAME_print_ex(bio, X509_get_subject_name(crt), 0, 0) < 0) {
441 log_ssl_errors(LOG_LEVEL_ERROR, "X509_NAME_print_ex() for subject failed");
446 if (BIO_puts(bio, "\nissued on : ") <= 0)
448 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_puts() for issued on failed");
452 if (!ASN1_TIME_print(bio, X509_get0_notBefore(crt)))
454 log_ssl_errors(LOG_LEVEL_ERROR, "ASN1_TIME_print() for issued on failed");
459 if (BIO_puts(bio, "\nexpires on : ") <= 0)
461 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_puts() for expires on failed");
465 if (!ASN1_TIME_print(bio, X509_get0_notAfter(crt)))
467 log_ssl_errors(LOG_LEVEL_ERROR, "ASN1_TIME_print() for expires on failed");
472 #if OPENSSL_VERSION_NUMBER > 0x10100000L
473 if (BIO_puts(bio, "\nsigned using : ") <= 0)
475 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_puts() for signed using failed");
479 tsig_alg = X509_get0_tbs_sigalg(crt);
480 if (!i2a_ASN1_OBJECT(bio, tsig_alg->algorithm))
482 log_ssl_errors(LOG_LEVEL_ERROR, "i2a_ASN1_OBJECT() for signed using failed");
487 pkey = X509_get_pubkey(crt);
490 log_ssl_errors(LOG_LEVEL_ERROR, "X509_get_pubkey() failed");
495 switch (EVP_PKEY_base_id(pkey))
498 ret = BIO_printf(bio, "\n%-" BC "s: %d bits", "RSA key size", EVP_PKEY_bits(pkey));
501 ret = BIO_printf(bio, "\n%-" BC "s: %d bits", "DSA key size", EVP_PKEY_bits(pkey));
504 ret = BIO_printf(bio, "\n%-" BC "s: %d bits", "non-RSA/DSA key size", EVP_PKEY_bits(pkey));
509 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_printf() for key size failed");
514 loc = X509_get_ext_by_NID(crt, NID_basic_constraints, -1);
517 X509_EXTENSION *ex = X509_get_ext(crt, loc);
518 if (BIO_puts(bio, "\nbasic constraints : ") <= 0)
520 log_ssl_errors(LOG_LEVEL_ERROR,
521 "BIO_printf() for basic constraints failed");
525 if (!X509V3_EXT_print(bio, ex, 0, 0))
527 if (!ASN1_STRING_print_ex(bio, X509_EXTENSION_get_data(ex), ASN1_STRFLGS_RFC2253))
529 log_ssl_errors(LOG_LEVEL_ERROR,
530 "ASN1_STRING_print_ex() for basic constraints failed");
537 loc = X509_get_ext_by_NID(crt, NID_subject_alt_name, -1);
540 X509_EXTENSION *ex = X509_get_ext(crt, loc);
541 if (BIO_puts(bio, "\nsubject alt name : ") <= 0)
543 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_printf() for alt name failed");
547 if (!X509V3_EXT_print(bio, ex, 0, 0))
549 if (!ASN1_STRING_print_ex(bio, X509_EXTENSION_get_data(ex),
550 ASN1_STRFLGS_RFC2253))
552 log_ssl_errors(LOG_LEVEL_ERROR,
553 "ASN1_STRING_print_ex() for alt name failed");
560 loc = X509_get_ext_by_NID(crt, NID_netscape_cert_type, -1);
563 X509_EXTENSION *ex = X509_get_ext(crt, loc);
564 if (BIO_puts(bio, "\ncert. type : ") <= 0)
566 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_printf() for cert type failed");
570 if (!X509V3_EXT_print(bio, ex, 0, 0))
572 if (!ASN1_STRING_print_ex(bio, X509_EXTENSION_get_data(ex),
573 ASN1_STRFLGS_RFC2253))
575 log_ssl_errors(LOG_LEVEL_ERROR,
576 "ASN1_STRING_print_ex() for cert type failed");
583 loc = X509_get_ext_by_NID(crt, NID_key_usage, -1);
586 X509_EXTENSION *ex = X509_get_ext(crt, loc);
587 if (BIO_puts(bio, "\nkey usage : ") <= 0)
589 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_printf() for key usage failed");
593 if (!X509V3_EXT_print(bio, ex, 0, 0))
595 if (!ASN1_STRING_print_ex(bio, X509_EXTENSION_get_data(ex),
596 ASN1_STRFLGS_RFC2253))
598 log_ssl_errors(LOG_LEVEL_ERROR,
599 "ASN1_STRING_print_ex() for key usage failed");
606 loc = X509_get_ext_by_NID(crt, NID_ext_key_usage, -1);
608 X509_EXTENSION *ex = X509_get_ext(crt, loc);
609 if (BIO_puts(bio, "\next key usage : ") <= 0)
611 log_ssl_errors(LOG_LEVEL_ERROR,
612 "BIO_printf() for ext key usage failed");
616 if (!X509V3_EXT_print(bio, ex, 0, 0))
618 if (!ASN1_STRING_print_ex(bio, X509_EXTENSION_get_data(ex),
619 ASN1_STRFLGS_RFC2253))
621 log_ssl_errors(LOG_LEVEL_ERROR,
622 "ASN1_STRING_print_ex() for ext key usage failed");
629 loc = X509_get_ext_by_NID(crt, NID_certificate_policies, -1);
632 X509_EXTENSION *ex = X509_get_ext(crt, loc);
633 if (BIO_puts(bio, "\ncertificate policies : ") <= 0)
635 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_printf() for certificate policies failed");
639 if (!X509V3_EXT_print(bio, ex, 0, 0))
641 if (!ASN1_STRING_print_ex(bio, X509_EXTENSION_get_data(ex),
642 ASN1_STRFLGS_RFC2253))
644 log_ssl_errors(LOG_LEVEL_ERROR,
645 "ASN1_STRING_print_ex() for certificate policies failed");
652 /* make valgrind happy */
653 static const char zero = 0;
654 BIO_write(bio, &zero, 1);
656 len = BIO_get_mem_data(bio, &bio_mem_data);
659 log_error(LOG_LEVEL_ERROR, "BIO_get_mem_data() returned %ld "
660 "while gathering certificate information", len);
664 encoded_text = html_encode(bio_mem_data);
665 if (encoded_text == NULL)
667 log_error(LOG_LEVEL_ERROR,
668 "Failed to HTML-encode the certificate information");
673 strlcpy(last->info_buf, encoded_text, sizeof(last->info_buf));
690 /*********************************************************************
692 * Function : host_to_hash
694 * Description : Creates MD5 hash from host name. Host name is loaded
695 * from structure csp and saved again into it.
698 * 1 : csp = Current client state (buffers, headers, etc...)
700 * Returns : -1 => Error while creating hash
701 * 0 => Hash created successfully
703 *********************************************************************/
704 static int host_to_hash(struct client_state *csp)
708 memset(csp->http->hash_of_host, 0, sizeof(csp->http->hash_of_host));
709 MD5((unsigned char *)csp->http->host, strlen(csp->http->host),
710 csp->http->hash_of_host);
712 /* Converting hash into string with hex */
716 if ((ret = sprintf((char *)csp->http->hash_of_host_hex + 2 * i, "%02x",
717 csp->http->hash_of_host[i])) < 0)
719 log_error(LOG_LEVEL_ERROR, "Sprintf return value: %d", ret);
728 /*********************************************************************
730 * Function : create_client_ssl_connection
732 * Description : Creates TLS/SSL secured connection with client
735 * 1 : csp = Current client state (buffers, headers, etc...)
737 * Returns : 0 on success, negative value if connection wasn't created
740 *********************************************************************/
741 extern int create_client_ssl_connection(struct client_state *csp)
743 struct ssl_attr *ssl_attr = &csp->ssl_client_attr;
744 /* Paths to certificates file and key file */
745 char *key_file = NULL;
746 char *cert_file = NULL;
751 * Initializing OpenSSL structures for TLS/SSL connection
756 * Preparing hash of host for creating certificates
758 ret = host_to_hash(csp);
761 log_error(LOG_LEVEL_ERROR, "Generating hash of host failed: %d", ret);
767 * Preparing paths to certificates files and key file
769 cert_file = make_certs_path(csp->config->certificate_directory,
770 (const char *)csp->http->hash_of_host_hex, CERT_FILE_TYPE);
771 key_file = make_certs_path(csp->config->certificate_directory,
772 (const char *)csp->http->hash_of_host_hex, KEY_FILE_TYPE);
774 if (cert_file == NULL || key_file == NULL)
781 * Generating certificate for requested host. Mutex to prevent
782 * certificate and key inconsistence must be locked.
784 privoxy_mutex_lock(&certificate_mutex);
786 ret = generate_host_certificate(csp);
789 log_error(LOG_LEVEL_ERROR,
790 "generate_host_certificate failed: %d", ret);
791 privoxy_mutex_unlock(&certificate_mutex);
795 privoxy_mutex_unlock(&certificate_mutex);
797 if (!(ssl_attr->openssl_attr.ctx = SSL_CTX_new(SSLv23_server_method())))
799 log_ssl_errors(LOG_LEVEL_ERROR, "Unable to create SSL context");
804 /* Set the key and cert */
805 if (SSL_CTX_use_certificate_file(ssl_attr->openssl_attr.ctx,
806 cert_file, SSL_FILETYPE_PEM) != 1)
808 log_ssl_errors(LOG_LEVEL_ERROR,
809 "Loading webpage certificate %s failed", cert_file);
814 if (SSL_CTX_use_PrivateKey_file(ssl_attr->openssl_attr.ctx,
815 key_file, SSL_FILETYPE_PEM) != 1)
817 log_ssl_errors(LOG_LEVEL_ERROR,
818 "Loading webpage certificate private key %s failed", key_file);
823 SSL_CTX_set_options(ssl_attr->openssl_attr.ctx, SSL_OP_NO_SSLv3);
825 if (!(ssl_attr->openssl_attr.bio = BIO_new_ssl(ssl_attr->openssl_attr.ctx, 0)))
827 log_ssl_errors(LOG_LEVEL_ERROR, "Unable to create BIO structure");
832 if (BIO_get_ssl(ssl_attr->openssl_attr.bio, &ssl) != 1)
834 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_get_ssl failed");
839 if (!SSL_set_fd(ssl, csp->cfd))
841 log_ssl_errors(LOG_LEVEL_ERROR, "SSL_set_fd failed");
846 if (csp->config->cipher_list != NULL)
848 if (!SSL_set_cipher_list(ssl, csp->config->cipher_list))
850 log_ssl_errors(LOG_LEVEL_ERROR,
851 "Setting the cipher list '%s' for the client connection failed",
852 csp->config->cipher_list);
859 * Handshake with client
861 log_error(LOG_LEVEL_CONNECT,
862 "Performing the TLS/SSL handshake with client. Hash of host: %s",
863 csp->http->hash_of_host_hex);
864 if (BIO_do_handshake(ssl_attr->openssl_attr.bio) != 1)
866 log_ssl_errors(LOG_LEVEL_ERROR,
867 "The TLS/SSL handshake with the client failed");
872 log_error(LOG_LEVEL_CONNECT, "Client successfully connected over TLS/SSL");
873 csp->ssl_with_client_is_opened = 1;
878 * Freeing allocated paths to files
883 /* Freeing structures if connection wasn't created successfully */
886 free_client_ssl_structures(csp);
892 /*********************************************************************
894 * Function : close_client_ssl_connection
896 * Description : Closes TLS/SSL connection with client. This function
897 * checks if this connection is already created.
900 * 1 : csp = Current client state (buffers, headers, etc...)
904 *********************************************************************/
905 extern void close_client_ssl_connection(struct client_state *csp)
907 struct ssl_attr *ssl_attr = &csp->ssl_client_attr;
910 if (csp->ssl_with_client_is_opened == 0)
916 * Notifying the peer that the connection is being closed.
918 BIO_ssl_shutdown(ssl_attr->openssl_attr.bio);
919 if (BIO_get_ssl(ssl_attr->openssl_attr.bio, &ssl) != 1)
921 log_ssl_errors(LOG_LEVEL_ERROR,
922 "BIO_get_ssl() failed in close_client_ssl_connection()");
927 * Pretend we received a shutdown alert so
928 * the BIO_free_all() call later on returns
931 SSL_set_shutdown(ssl, SSL_RECEIVED_SHUTDOWN);
933 free_client_ssl_structures(csp);
934 csp->ssl_with_client_is_opened = 0;
938 /*********************************************************************
940 * Function : free_client_ssl_structures
942 * Description : Frees structures used for SSL communication with
946 * 1 : csp = Current client state (buffers, headers, etc...)
950 *********************************************************************/
951 static void free_client_ssl_structures(struct client_state *csp)
953 struct ssl_attr *ssl_attr = &csp->ssl_client_attr;
955 if (ssl_attr->openssl_attr.bio)
957 BIO_free_all(ssl_attr->openssl_attr.bio);
959 if (ssl_attr->openssl_attr.ctx)
961 SSL_CTX_free(ssl_attr->openssl_attr.ctx);
966 /*********************************************************************
968 * Function : close_server_ssl_connection
970 * Description : Closes TLS/SSL connection with server. This function
971 * checks if this connection is already opened.
974 * 1 : csp = Current client state (buffers, headers, etc...)
978 *********************************************************************/
979 extern void close_server_ssl_connection(struct client_state *csp)
981 struct ssl_attr *ssl_attr = &csp->ssl_server_attr;
984 if (csp->ssl_with_server_is_opened == 0)
990 * Notifying the peer that the connection is being closed.
992 BIO_ssl_shutdown(ssl_attr->openssl_attr.bio);
993 if (BIO_get_ssl(ssl_attr->openssl_attr.bio, &ssl) != 1)
995 log_ssl_errors(LOG_LEVEL_ERROR,
996 "BIO_get_ssl() failed in close_server_ssl_connection()");
1001 * Pretend we received a shutdown alert so
1002 * the BIO_free_all() call later on returns
1005 SSL_set_shutdown(ssl, SSL_RECEIVED_SHUTDOWN);
1007 free_server_ssl_structures(csp);
1008 csp->ssl_with_server_is_opened = 0;
1012 /*********************************************************************
1014 * Function : create_server_ssl_connection
1016 * Description : Creates TLS/SSL secured connection with server.
1019 * 1 : csp = Current client state (buffers, headers, etc...)
1021 * Returns : 0 on success, negative value if connection wasn't created
1024 *********************************************************************/
1025 extern int create_server_ssl_connection(struct client_state *csp)
1027 openssl_connection_attr *ssl_attrs = &csp->ssl_server_attr.openssl_attr;
1029 char *trusted_cas_file = NULL;
1030 STACK_OF(X509) *chain;
1033 csp->server_cert_verification_result = SSL_CERT_NOT_VERIFIED;
1034 csp->server_certs_chain.next = NULL;
1036 /* Setting path to file with trusted CAs */
1037 trusted_cas_file = csp->config->trusted_cas_file;
1039 ssl_attrs->ctx = SSL_CTX_new(SSLv23_method());
1040 if (!ssl_attrs->ctx)
1042 log_ssl_errors(LOG_LEVEL_ERROR, "SSL context creation failed");
1048 * Loading file with trusted CAs
1050 if (!SSL_CTX_load_verify_locations(ssl_attrs->ctx, trusted_cas_file, NULL))
1052 log_ssl_errors(LOG_LEVEL_ERROR, "Loading trusted CAs file %s failed",
1058 SSL_CTX_set_verify(ssl_attrs->ctx, SSL_VERIFY_NONE, NULL);
1059 SSL_CTX_set_options(ssl_attrs->ctx, SSL_OP_NO_SSLv3);
1061 if (!(ssl_attrs->bio = BIO_new_ssl(ssl_attrs->ctx, 1)))
1063 log_ssl_errors(LOG_LEVEL_ERROR, "Unable to create BIO structure");
1068 if (BIO_get_ssl(ssl_attrs->bio, &ssl) != 1)
1070 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_get_ssl failed");
1075 if (!SSL_set_fd(ssl, csp->server_connection.sfd))
1077 log_ssl_errors(LOG_LEVEL_ERROR, "SSL_set_fd failed");
1082 if (csp->config->cipher_list != NULL)
1084 if (!SSL_set_cipher_list(ssl, csp->config->cipher_list))
1086 log_ssl_errors(LOG_LEVEL_ERROR,
1087 "Setting the cipher list '%s' for the server connection failed",
1088 csp->config->cipher_list);
1095 * Set the hostname to check against the received server certificate
1097 #if OPENSSL_VERSION_NUMBER > 0x10100000L
1098 if (!SSL_set1_host(ssl, csp->http->host))
1100 log_ssl_errors(LOG_LEVEL_ERROR, "SSL_set1_host failed");
1105 if (host_is_ip_address(csp->http->host))
1107 if (X509_VERIFY_PARAM_set1_ip_asc(ssl->param, csp->http->host) != 1)
1109 log_ssl_errors(LOG_LEVEL_ERROR,
1110 "X509_VERIFY_PARAM_set1_ip_asc() failed");
1117 if (X509_VERIFY_PARAM_set1_host(ssl->param, csp->http->host, 0) != 1)
1119 log_ssl_errors(LOG_LEVEL_ERROR,
1120 "X509_VERIFY_PARAM_set1_host() failed");
1127 if (!SSL_set_tlsext_host_name(ssl, csp->http->host))
1129 log_ssl_errors(LOG_LEVEL_ERROR, "SSL_set_tlsext_host_name failed");
1135 * Handshake with server
1137 log_error(LOG_LEVEL_CONNECT,
1138 "Performing the TLS/SSL handshake with the server");
1140 if (BIO_do_handshake(ssl_attrs->bio) != 1)
1142 log_ssl_errors(LOG_LEVEL_ERROR,
1143 "The TLS/SSL handshake with the server failed");
1148 chain = SSL_get_peer_cert_chain(ssl);
1152 for (i = 0; i < sk_X509_num(chain); i++)
1154 if (ssl_store_cert(csp, sk_X509_value(chain, i)) != 0)
1156 log_error(LOG_LEVEL_ERROR, "ssl_store_cert failed");
1163 if (!csp->dont_verify_certificate)
1165 long verify_result = SSL_get_verify_result(ssl);
1166 if (verify_result == X509_V_OK)
1169 csp->server_cert_verification_result = SSL_CERT_VALID;
1173 csp->server_cert_verification_result = verify_result;
1174 log_error(LOG_LEVEL_ERROR,
1175 "X509 certificate verification for %s failed: %s",
1176 csp->http->hostport, X509_verify_cert_error_string(verify_result));
1182 log_error(LOG_LEVEL_CONNECT, "Server successfully connected over TLS/SSL");
1185 * Server certificate chain is valid, so we can clean
1186 * chain, because we will not send it to client.
1188 free_certificate_chain(csp);
1190 csp->ssl_with_server_is_opened = 1;
1192 /* Freeing structures if connection wasn't created successfully */
1195 free_server_ssl_structures(csp);
1202 /*********************************************************************
1204 * Function : free_server_ssl_structures
1206 * Description : Frees structures used for SSL communication with server
1209 * 1 : csp = Current client state (buffers, headers, etc...)
1213 *********************************************************************/
1214 static void free_server_ssl_structures(struct client_state *csp)
1216 struct ssl_attr *ssl_attr = &csp->ssl_server_attr;
1218 if (ssl_attr->openssl_attr.bio)
1220 BIO_free_all(ssl_attr->openssl_attr.bio);
1222 if (ssl_attr->openssl_attr.ctx)
1224 SSL_CTX_free(ssl_attr->openssl_attr.ctx);
1229 /*********************************************************************
1231 * Function : log_ssl_errors
1233 * Description : Log SSL errors
1236 * 1 : debuglevel = Debug level
1237 * 2 : desc = Error description
1241 *********************************************************************/
1242 static void log_ssl_errors(int debuglevel, const char* fmt, ...)
1244 unsigned long err_code;
1245 char prefix[ERROR_BUF_SIZE];
1247 va_start(args, fmt);
1248 vsnprintf(prefix, sizeof(prefix), fmt, args);
1251 while ((err_code = ERR_get_error()))
1253 char err_buf[ERROR_BUF_SIZE];
1255 ERR_error_string_n(err_code, err_buf, sizeof(err_buf));
1256 log_error(debuglevel, "%s: %s", prefix, err_buf);
1260 * In case if called by mistake and there were
1261 * no TLS/SSL errors let's report it to the log.
1265 log_error(debuglevel, "%s: no TLS/SSL errors detected", prefix);
1270 /*********************************************************************
1272 * Function : ssl_base64_encode
1274 * Description : Encode a buffer into base64 format.
1277 * 1 : dst = Destination buffer
1278 * 2 : dlen = Destination buffer length
1279 * 3 : olen = Number of bytes written
1280 * 4 : src = Source buffer
1281 * 5 : slen = Amount of data to be encoded
1283 * Returns : 0 on success, error code othervise
1285 *********************************************************************/
1286 extern int ssl_base64_encode(unsigned char *dst, size_t dlen, size_t *olen,
1287 const unsigned char *src, size_t slen)
1289 *olen = 4 * ((slen/3) + ((slen%3) ? 1 : 0)) + 1;
1294 *olen = (size_t)EVP_EncodeBlock(dst, src, (int)slen) + 1;
1299 /*********************************************************************
1301 * Function : close_file_stream
1303 * Description : Close file stream, report error on close error
1306 * 1 : f = file stream to close
1307 * 2 : path = path for error report
1311 *********************************************************************/
1312 static void close_file_stream(FILE *f, const char *path)
1316 log_error(LOG_LEVEL_ERROR,
1317 "Error closing file %s: %s", path, strerror(errno));
1322 /*********************************************************************
1324 * Function : write_certificate
1326 * Description : Writes certificate into file.
1329 * 1 : crt = certificate to write into file
1330 * 2 : output_file = path to save certificate file
1333 * Returns : 1 on success success or negative value
1335 *********************************************************************/
1336 static int write_certificate(X509 *crt, const char *output_file)
1342 * Saving certificate into file
1344 if ((f = fopen(output_file, "w")) == NULL)
1346 log_error(LOG_LEVEL_ERROR, "Opening file %s to save certificate failed",
1351 ret = PEM_write_X509(f, crt);
1354 log_ssl_errors(LOG_LEVEL_ERROR,
1355 "Writing certificate into file %s failed", output_file);
1359 close_file_stream(f, output_file);
1364 /*********************************************************************
1366 * Function : write_private_key
1368 * Description : Writes private key into file and copies saved
1369 * content into given pointer to string. If function
1370 * returns 0 for success, this copy must be freed by
1374 * 1 : key = key to write into file
1375 * 2 : ret_buf = pointer to string with created key file content
1376 * 3 : key_file_path = path where to save key file
1378 * Returns : Length of written private key on success or negative value
1381 *********************************************************************/
1382 static int write_private_key(EVP_PKEY *key, char **ret_buf,
1383 const char *key_file_path)
1385 size_t len = 0; /* Length of created key */
1386 FILE *f = NULL; /* File to save certificate */
1388 BIO *bio_mem = BIO_new(BIO_s_mem());
1389 char *bio_mem_data = 0;
1391 if (bio_mem == NULL)
1393 log_ssl_errors(LOG_LEVEL_ERROR, "write_private_key memory allocation failure");
1398 * Writing private key into PEM string
1400 if (!PEM_write_bio_PrivateKey(bio_mem, key, NULL, NULL, 0, NULL, NULL))
1402 log_ssl_errors(LOG_LEVEL_ERROR,
1403 "Writing private key into PEM string failed");
1408 len = (size_t)BIO_get_mem_data(bio_mem, &bio_mem_data);
1410 /* Initializing buffer for key file content */
1411 *ret_buf = zalloc_or_die(len + 1);
1412 (*ret_buf)[len] = 0;
1414 strncpy(*ret_buf, bio_mem_data, len);
1417 * Saving key into file
1419 if ((f = fopen(key_file_path, "wb")) == NULL)
1421 log_error(LOG_LEVEL_ERROR,
1422 "Opening file %s to save private key failed: %E",
1428 if (fwrite(*ret_buf, 1, len, f) != len)
1430 log_error(LOG_LEVEL_ERROR,
1431 "Writing private key into file %s failed",
1433 close_file_stream(f, key_file_path);
1438 close_file_stream(f, key_file_path);
1452 /*********************************************************************
1454 * Function : generate_key
1456 * Description : Tests if private key for host saved in csp already
1457 * exists. If this file doesn't exists, a new key is
1458 * generated and saved in a file. The generated key is also
1459 * copied into given parameter key_buf, which must be then
1460 * freed by caller. If file with key exists, key_buf
1461 * contain NULL and no private key is generated.
1464 * 1 : csp = Current client state (buffers, headers, etc...)
1465 * 2 : key_buf = buffer to save new generated key
1467 * Returns : -1 => Error while generating private key
1468 * 0 => Key already exists
1469 * >0 => Length of generated private key
1471 *********************************************************************/
1472 static int generate_key(struct client_state *csp, char **key_buf)
1475 char* key_file_path;
1480 key_file_path = make_certs_path(csp->config->certificate_directory,
1481 (char *)csp->http->hash_of_host_hex, KEY_FILE_TYPE);
1482 if (key_file_path == NULL)
1488 * Test if key already exists. If so, we don't have to create it again.
1490 if (file_exists(key_file_path) == 1)
1492 freez(key_file_path);
1498 key = EVP_PKEY_new();
1499 if (exp == NULL || rsa == NULL || key == NULL)
1501 log_ssl_errors(LOG_LEVEL_ERROR, "RSA key memory allocation failure");
1506 if (BN_set_word(exp, RSA_KEY_PUBLIC_EXPONENT) != 1)
1508 log_ssl_errors(LOG_LEVEL_ERROR, "Setting RSA key exponent failed");
1513 ret = RSA_generate_key_ex(rsa, RSA_KEYSIZE, exp, NULL);
1516 log_ssl_errors(LOG_LEVEL_ERROR, "RSA key generation failure");
1521 if (!EVP_PKEY_set1_RSA(key, rsa))
1523 log_ssl_errors(LOG_LEVEL_ERROR,
1524 "Error assigning RSA key pair to PKEY structure");
1530 * Exporting private key into file
1532 if ((ret = write_private_key(key, key_buf, key_file_path)) < 0)
1534 log_error(LOG_LEVEL_ERROR,
1535 "Writing private key into file %s failed", key_file_path);
1542 * Freeing used variables
1556 freez(key_file_path);
1562 /*********************************************************************
1564 * Function : ssl_certificate_load
1566 * Description : Loads certificate from file.
1569 * 1 : cert_path = The certificate path to load
1571 * Returns : NULL => error loading certificate,
1572 * pointer to certificate instance otherwise
1574 *********************************************************************/
1575 static X509* ssl_certificate_load(const char *cert_path)
1578 FILE *cert_f = NULL;
1580 if (!(cert_f = fopen(cert_path, "r")))
1582 log_error(LOG_LEVEL_ERROR,
1583 "Error opening certificate file %s: %s", cert_path, strerror(errno));
1587 if (!(cert = PEM_read_X509(cert_f, NULL, NULL, NULL)))
1589 log_ssl_errors(LOG_LEVEL_ERROR,
1590 "Error reading certificate file %s", cert_path);
1593 close_file_stream(cert_f, cert_path);
1598 /*********************************************************************
1600 * Function : ssl_certificate_is_invalid
1602 * Description : Checks whether or not a certificate is valid.
1603 * Currently only checks that the certificate can be
1604 * parsed and that the "valid to" date is in the future.
1607 * 1 : cert_file = The certificate to check
1609 * Returns : 0 => The certificate is valid.
1610 * 1 => The certificate is invalid
1612 *********************************************************************/
1613 static int ssl_certificate_is_invalid(const char *cert_file)
1619 if (!(cert = ssl_certificate_load(cert_file)))
1624 ret = X509_cmp_current_time(X509_get_notAfter(cert));
1627 log_ssl_errors(LOG_LEVEL_ERROR,
1628 "Error checking certificate %s validity", cert_file);
1634 return ret == -1 ? 1 : 0;
1638 /*********************************************************************
1640 * Function : set_x509_ext
1642 * Description : Sets the X509V3 extension data
1645 * 1 : cert = The certificate to modify
1646 * 2 : issuer = Issuer certificate
1647 * 3 : nid = OpenSSL NID
1648 * 4 : value = extension value
1650 * Returns : 0 => Error while setting extension data
1653 *********************************************************************/
1654 static int set_x509_ext(X509 *cert, X509 *issuer, int nid, char *value)
1656 X509_EXTENSION *ext = NULL;
1660 X509V3_set_ctx(&ctx, issuer, cert, NULL, NULL, 0);
1661 ext = X509V3_EXT_conf_nid(NULL, &ctx, nid, value);
1664 log_ssl_errors(LOG_LEVEL_ERROR, "X509V3_EXT_conf_nid failure");
1668 if (!X509_add_ext(cert, ext, -1))
1670 log_ssl_errors(LOG_LEVEL_ERROR, "X509_add_ext failure");
1678 X509_EXTENSION_free(ext);
1684 /*********************************************************************
1686 * Function : set_subject_alternative_name
1688 * Description : Sets the Subject Alternative Name extension to a cert
1691 * 1 : cert = The certificate to modify
1692 * 2 : issuer = Issuer certificate
1693 * 3 : hostname = The hostname to add
1695 * Returns : 0 => Error while creating certificate.
1698 *********************************************************************/
1699 static int set_subject_alternative_name(X509 *cert, X509 *issuer, const char *hostname)
1701 size_t altname_len = strlen(hostname) + sizeof(CERTIFICATE_ALT_NAME_PREFIX);
1702 char alt_name_buf[altname_len];
1704 snprintf(alt_name_buf, sizeof(alt_name_buf),
1705 CERTIFICATE_ALT_NAME_PREFIX"%s", hostname);
1706 return set_x509_ext(cert, issuer, NID_subject_alt_name, alt_name_buf);
1710 /*********************************************************************
1712 * Function : generate_host_certificate
1714 * Description : Creates certificate file in presetted directory.
1715 * If certificate already exists, no other certificate
1716 * will be created. Subject of certificate is named
1717 * by csp->http->host from parameter. This function also
1718 * triggers generating of private key for new certificate.
1721 * 1 : csp = Current client state (buffers, headers, etc...)
1723 * Returns : -1 => Error while creating certificate.
1724 * 0 => Certificate already exists.
1725 * 1 => Certificate created
1727 *********************************************************************/
1728 static int generate_host_certificate(struct client_state *csp)
1730 char *key_buf = NULL; /* Buffer for created key */
1731 X509 *issuer_cert = NULL;
1734 EVP_PKEY *loaded_subject_key = NULL;
1735 EVP_PKEY *loaded_issuer_key = NULL;
1736 X509_NAME *issuer_name;
1737 X509_NAME *subject_name = NULL;
1738 ASN1_TIME *asn_time = NULL;
1739 ASN1_INTEGER *serial = NULL;
1740 BIGNUM *serial_num = NULL;
1743 cert_options cert_opt;
1744 char cert_valid_from[VALID_DATETIME_BUFLEN];
1745 char cert_valid_to[VALID_DATETIME_BUFLEN];
1747 /* Paths to keys and certificates needed to create certificate */
1748 cert_opt.issuer_key = NULL;
1749 cert_opt.subject_key = NULL;
1750 cert_opt.issuer_crt = NULL;
1752 cert_opt.output_file = make_certs_path(csp->config->certificate_directory,
1753 (const char *)csp->http->hash_of_host_hex, CERT_FILE_TYPE);
1754 if (cert_opt.output_file == NULL)
1759 cert_opt.subject_key = make_certs_path(csp->config->certificate_directory,
1760 (const char *)csp->http->hash_of_host_hex, KEY_FILE_TYPE);
1761 if (cert_opt.subject_key == NULL)
1763 freez(cert_opt.output_file);
1767 if (enforce_sane_certificate_state(cert_opt.output_file,
1768 cert_opt.subject_key))
1770 freez(cert_opt.output_file);
1771 freez(cert_opt.subject_key);
1776 if (file_exists(cert_opt.output_file) == 1)
1778 /* The file exists, but is it valid? */
1779 if (ssl_certificate_is_invalid(cert_opt.output_file))
1781 log_error(LOG_LEVEL_CONNECT,
1782 "Certificate %s is no longer valid. Removing it.",
1783 cert_opt.output_file);
1784 if (unlink(cert_opt.output_file))
1786 log_error(LOG_LEVEL_ERROR, "Failed to unlink %s: %E",
1787 cert_opt.output_file);
1789 freez(cert_opt.output_file);
1790 freez(cert_opt.subject_key);
1794 if (unlink(cert_opt.subject_key))
1796 log_error(LOG_LEVEL_ERROR, "Failed to unlink %s: %E",
1797 cert_opt.subject_key);
1799 freez(cert_opt.output_file);
1800 freez(cert_opt.subject_key);
1807 freez(cert_opt.output_file);
1808 freez(cert_opt.subject_key);
1815 * Create key for requested host
1817 int subject_key_len = generate_key(csp, &key_buf);
1818 if (subject_key_len < 0)
1820 freez(cert_opt.output_file);
1821 freez(cert_opt.subject_key);
1822 log_error(LOG_LEVEL_ERROR, "Key generating failed");
1827 * Converting unsigned long serial number to char * serial number.
1828 * We must compute length of serial number in string + terminating null.
1830 unsigned long certificate_serial = get_certificate_serial(csp);
1831 unsigned long certificate_serial_time = (unsigned long)time(NULL);
1832 int serial_num_size = snprintf(NULL, 0, "%lu%lu",
1833 certificate_serial_time, certificate_serial) + 1;
1834 if (serial_num_size <= 0)
1836 serial_num_size = 1;
1839 char serial_num_text[serial_num_size]; /* Buffer for serial number */
1840 ret = snprintf(serial_num_text, (size_t)serial_num_size, "%lu%lu",
1841 certificate_serial_time, certificate_serial);
1842 if (ret < 0 || ret >= serial_num_size)
1844 log_error(LOG_LEVEL_ERROR,
1845 "Converting certificate serial number into string failed");
1851 * Preparing parameters for certificate
1853 subject_name = X509_NAME_new();
1856 log_ssl_errors(LOG_LEVEL_ERROR, "RSA key memory allocation failure");
1861 if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_COMMON_NAME_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_COMMON_NAME_FCODE, csp->http->host);
1870 if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_ORGANIZATION_FCODE,
1871 MBSTRING_ASC, (void *)csp->http->host, -1, -1, 0))
1873 log_ssl_errors(LOG_LEVEL_ERROR,
1874 "X509 subject name (code: %s, val: %s) error",
1875 CERT_PARAM_ORGANIZATION_FCODE, csp->http->host);
1879 if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_ORG_UNIT_FCODE,
1880 MBSTRING_ASC, (void *)csp->http->host, -1, -1, 0))
1882 log_ssl_errors(LOG_LEVEL_ERROR,
1883 "X509 subject name (code: %s, val: %s) error",
1884 CERT_PARAM_ORG_UNIT_FCODE, csp->http->host);
1888 if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_COUNTRY_FCODE,
1889 MBSTRING_ASC, (void *)CERT_PARAM_COUNTRY_CODE, -1, -1, 0))
1891 log_ssl_errors(LOG_LEVEL_ERROR,
1892 "X509 subject name (code: %s, val: %s) error",
1893 CERT_PARAM_COUNTRY_FCODE, csp->http->host);
1898 cert_opt.issuer_crt = csp->config->ca_cert_file;
1899 cert_opt.issuer_key = csp->config->ca_key_file;
1901 if (get_certificate_valid_from_date(cert_valid_from,
1902 sizeof(cert_valid_from), VALID_DATETIME_FMT)
1903 || get_certificate_valid_to_date(cert_valid_to,
1904 sizeof(cert_valid_to), VALID_DATETIME_FMT))
1906 log_error(LOG_LEVEL_ERROR, "Generating one of the validity dates failed");
1911 cert_opt.subject_pwd = CERT_SUBJECT_PASSWORD;
1912 cert_opt.issuer_pwd = csp->config->ca_password;
1913 cert_opt.not_before = cert_valid_from;
1914 cert_opt.not_after = cert_valid_to;
1915 cert_opt.serial = serial_num_text;
1916 cert_opt.max_pathlen = -1;
1919 * Test if the private key was already created.
1920 * XXX: Can this still happen?
1922 if (subject_key_len == 0)
1924 log_error(LOG_LEVEL_ERROR, "Subject key was already created");
1930 * Parse serial to MPI
1932 serial_num = BN_new();
1935 log_error(LOG_LEVEL_ERROR, "generate_host_certificate: memory error");
1939 if (!BN_dec2bn(&serial_num, cert_opt.serial))
1941 log_ssl_errors(LOG_LEVEL_ERROR, "Failed to parse serial %s", cert_opt.serial);
1946 if (!(serial = BN_to_ASN1_INTEGER(serial_num, NULL)))
1948 log_ssl_errors(LOG_LEVEL_ERROR, "Failed to generate serial ASN1 representation");
1954 * Loading certificates
1956 if (!(issuer_cert = ssl_certificate_load(cert_opt.issuer_crt)))
1958 log_error(LOG_LEVEL_ERROR, "Loading issuer certificate %s failed",
1959 cert_opt.issuer_crt);
1964 issuer_name = X509_get_issuer_name(issuer_cert);
1967 * Loading keys from file or from buffer
1969 if (key_buf != NULL && subject_key_len > 0)
1971 pk_bio = BIO_new_mem_buf(key_buf, subject_key_len);
1973 else if (!(pk_bio = BIO_new_file(cert_opt.subject_key, "r")))
1975 log_ssl_errors(LOG_LEVEL_ERROR,
1976 "Failure opening subject key %s BIO", cert_opt.subject_key);
1981 loaded_subject_key = PEM_read_bio_PrivateKey(pk_bio, NULL, NULL,
1982 (void *)cert_opt.subject_pwd);
1983 if (!loaded_subject_key)
1985 log_ssl_errors(LOG_LEVEL_ERROR, "Parsing subject key %s failed",
1986 cert_opt.subject_key);
1991 if (!BIO_free(pk_bio))
1993 log_ssl_errors(LOG_LEVEL_ERROR, "Error closing subject key BIO");
1996 if (!(pk_bio = BIO_new_file(cert_opt.issuer_key, "r")))
1998 log_ssl_errors(LOG_LEVEL_ERROR, "Failure opening issuer key %s BIO",
1999 cert_opt.issuer_key);
2004 loaded_issuer_key = PEM_read_bio_PrivateKey(pk_bio, NULL, NULL,
2005 (void *)cert_opt.issuer_pwd);
2006 if (!loaded_issuer_key)
2008 log_ssl_errors(LOG_LEVEL_ERROR, "Parsing issuer key %s failed",
2009 cert_opt.subject_key);
2017 log_ssl_errors(LOG_LEVEL_ERROR, "Certificate allocation error");
2022 if (!X509_set_version(cert, CERTIFICATE_VERSION))
2024 log_ssl_errors(LOG_LEVEL_ERROR, "X509_set_version failed");
2030 * Setting parameters of signed certificate
2032 if (!X509_set_pubkey(cert, loaded_subject_key))
2034 log_ssl_errors(LOG_LEVEL_ERROR,
2035 "Setting public key in signed certificate failed");
2040 if (!X509_set_subject_name(cert, subject_name))
2042 log_ssl_errors(LOG_LEVEL_ERROR,
2043 "Setting subject name in signed certificate failed");
2048 if (!X509_set_issuer_name(cert, issuer_name))
2050 log_ssl_errors(LOG_LEVEL_ERROR,
2051 "Setting issuer name in signed certificate failed");
2056 if (!X509_set_serialNumber(cert, serial))
2058 log_ssl_errors(LOG_LEVEL_ERROR,
2059 "Setting serial number in signed certificate failed");
2064 asn_time = ASN1_TIME_new();
2067 log_ssl_errors(LOG_LEVEL_ERROR, "ASN1 time memory allocation failure");
2072 if (!ASN1_TIME_set_string(asn_time, cert_opt.not_after))
2074 log_ssl_errors(LOG_LEVEL_ERROR, "ASN1 time [%s] encode error", cert_opt.not_after);
2079 if (!X509_set1_notAfter(cert, asn_time))
2081 log_ssl_errors(LOG_LEVEL_ERROR,
2082 "Setting valid not after in signed certificate failed");
2087 if (!ASN1_TIME_set_string(asn_time, cert_opt.not_before))
2089 log_ssl_errors(LOG_LEVEL_ERROR, "ASN1 time encode error");
2094 if (!X509_set1_notBefore(cert, asn_time))
2096 log_ssl_errors(LOG_LEVEL_ERROR,
2097 "Setting valid not before in signed certificate failed");
2102 if (!set_x509_ext(cert, issuer_cert, NID_basic_constraints, CERTIFICATE_BASIC_CONSTRAINTS))
2104 log_ssl_errors(LOG_LEVEL_ERROR, "Setting the basicConstraints extension "
2105 "in signed certificate failed");
2110 if (!set_x509_ext(cert, issuer_cert, NID_subject_key_identifier, CERTIFICATE_SUBJECT_KEY))
2112 log_ssl_errors(LOG_LEVEL_ERROR,
2113 "Setting the Subject Key Identifier extension failed");
2118 if (!set_x509_ext(cert, issuer_cert, NID_authority_key_identifier, CERTIFICATE_AUTHORITY_KEY))
2120 log_ssl_errors(LOG_LEVEL_ERROR,
2121 "Setting the Authority Key Identifier extension failed");
2126 if (!host_is_ip_address(csp->http->host) &&
2127 !set_subject_alternative_name(cert, issuer_cert, csp->http->host))
2129 log_ssl_errors(LOG_LEVEL_ERROR,
2130 "Setting the Subject Alt Name extension failed");
2135 if (!X509_sign(cert, loaded_issuer_key, EVP_sha256()))
2137 log_ssl_errors(LOG_LEVEL_ERROR, "Signing certificate failed");
2143 * Writing certificate into file
2145 if (write_certificate(cert, cert_opt.output_file) < 0)
2147 log_error(LOG_LEVEL_ERROR, "Writing certificate into file failed");
2156 * Freeing used structures
2160 X509_free(issuer_cert);
2166 if (pk_bio && !BIO_free(pk_bio))
2168 log_ssl_errors(LOG_LEVEL_ERROR, "Error closing pk BIO");
2170 if (loaded_subject_key)
2172 EVP_PKEY_free(loaded_subject_key);
2174 if (loaded_issuer_key)
2176 EVP_PKEY_free(loaded_issuer_key);
2180 X509_NAME_free(subject_name);
2184 ASN1_TIME_free(asn_time);
2188 BN_free(serial_num);
2192 ASN1_INTEGER_free(serial);
2194 freez(cert_opt.subject_key);
2195 freez(cert_opt.output_file);
2202 /*********************************************************************
2204 * Function : ssl_crt_verify_info
2206 * Description : Returns an informational string about the verification
2207 * status of a certificate.
2210 * 1 : buf = Buffer to write to
2211 * 2 : size = Maximum size of buffer
2212 * 3 : csp = client state
2216 *********************************************************************/
2217 extern void ssl_crt_verify_info(char *buf, size_t size, struct client_state *csp)
2219 strncpy(buf, X509_verify_cert_error_string(csp->server_cert_verification_result), size);
2224 #ifdef FEATURE_GRACEFUL_TERMINATION
2225 /*********************************************************************
2227 * Function : ssl_release
2229 * Description : Release all SSL resources
2235 *********************************************************************/
2236 extern void ssl_release(void)
2238 if (ssl_inited == 1)
2240 #if OPENSSL_VERSION_NUMBER >= 0x1000200fL
2241 #ifndef LIBRESSL_VERSION_NUMBER
2242 #ifndef OPENSSL_NO_COMP
2243 SSL_COMP_free_compression_methods();
2247 CONF_modules_free();
2248 CONF_modules_unload(1);
2249 #ifndef OPENSSL_NO_COMP
2250 COMP_zlib_cleanup();
2256 CRYPTO_cleanup_all_ex_data();
2259 #endif /* def FEATURE_GRACEFUL_TERMINATION */