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() 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() 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 %s (%s).",
873 SSL_get_version(ssl), SSL_get_cipher_name(ssl));
875 csp->ssl_with_client_is_opened = 1;
880 * Freeing allocated paths to files
885 /* Freeing structures if connection wasn't created successfully */
888 free_client_ssl_structures(csp);
894 /*********************************************************************
896 * Function : close_client_ssl_connection
898 * Description : Closes TLS/SSL connection with client. This function
899 * checks if this connection is already created.
902 * 1 : csp = Current client state (buffers, headers, etc...)
906 *********************************************************************/
907 extern void close_client_ssl_connection(struct client_state *csp)
909 struct ssl_attr *ssl_attr = &csp->ssl_client_attr;
912 if (csp->ssl_with_client_is_opened == 0)
918 * Notifying the peer that the connection is being closed.
920 BIO_ssl_shutdown(ssl_attr->openssl_attr.bio);
921 if (BIO_get_ssl(ssl_attr->openssl_attr.bio, &ssl) != 1)
923 log_ssl_errors(LOG_LEVEL_ERROR,
924 "BIO_get_ssl() failed in close_client_ssl_connection()");
929 * Pretend we received a shutdown alert so
930 * the BIO_free_all() call later on returns
933 SSL_set_shutdown(ssl, SSL_RECEIVED_SHUTDOWN);
935 free_client_ssl_structures(csp);
936 csp->ssl_with_client_is_opened = 0;
940 /*********************************************************************
942 * Function : free_client_ssl_structures
944 * Description : Frees structures used for SSL communication with
948 * 1 : csp = Current client state (buffers, headers, etc...)
952 *********************************************************************/
953 static void free_client_ssl_structures(struct client_state *csp)
955 struct ssl_attr *ssl_attr = &csp->ssl_client_attr;
957 if (ssl_attr->openssl_attr.bio)
959 BIO_free_all(ssl_attr->openssl_attr.bio);
961 if (ssl_attr->openssl_attr.ctx)
963 SSL_CTX_free(ssl_attr->openssl_attr.ctx);
968 /*********************************************************************
970 * Function : close_server_ssl_connection
972 * Description : Closes TLS/SSL connection with server. This function
973 * checks if this connection is already opened.
976 * 1 : csp = Current client state (buffers, headers, etc...)
980 *********************************************************************/
981 extern void close_server_ssl_connection(struct client_state *csp)
983 struct ssl_attr *ssl_attr = &csp->ssl_server_attr;
986 if (csp->ssl_with_server_is_opened == 0)
992 * Notifying the peer that the connection is being closed.
994 BIO_ssl_shutdown(ssl_attr->openssl_attr.bio);
995 if (BIO_get_ssl(ssl_attr->openssl_attr.bio, &ssl) != 1)
997 log_ssl_errors(LOG_LEVEL_ERROR,
998 "BIO_get_ssl() failed in close_server_ssl_connection()");
1003 * Pretend we received a shutdown alert so
1004 * the BIO_free_all() call later on returns
1007 SSL_set_shutdown(ssl, SSL_RECEIVED_SHUTDOWN);
1009 free_server_ssl_structures(csp);
1010 csp->ssl_with_server_is_opened = 0;
1014 /*********************************************************************
1016 * Function : create_server_ssl_connection
1018 * Description : Creates TLS/SSL secured connection with server.
1021 * 1 : csp = Current client state (buffers, headers, etc...)
1023 * Returns : 0 on success, negative value if connection wasn't created
1026 *********************************************************************/
1027 extern int create_server_ssl_connection(struct client_state *csp)
1029 openssl_connection_attr *ssl_attrs = &csp->ssl_server_attr.openssl_attr;
1031 char *trusted_cas_file = NULL;
1032 STACK_OF(X509) *chain;
1035 csp->server_cert_verification_result = SSL_CERT_NOT_VERIFIED;
1036 csp->server_certs_chain.next = NULL;
1038 /* Setting path to file with trusted CAs */
1039 trusted_cas_file = csp->config->trusted_cas_file;
1041 ssl_attrs->ctx = SSL_CTX_new(SSLv23_method());
1042 if (!ssl_attrs->ctx)
1044 log_ssl_errors(LOG_LEVEL_ERROR, "SSL context creation failed");
1050 * Loading file with trusted CAs
1052 if (!SSL_CTX_load_verify_locations(ssl_attrs->ctx, trusted_cas_file, NULL))
1054 log_ssl_errors(LOG_LEVEL_ERROR, "Loading trusted CAs file %s failed",
1060 SSL_CTX_set_verify(ssl_attrs->ctx, SSL_VERIFY_NONE, NULL);
1061 SSL_CTX_set_options(ssl_attrs->ctx, SSL_OP_NO_SSLv3);
1063 if (!(ssl_attrs->bio = BIO_new_ssl(ssl_attrs->ctx, 1)))
1065 log_ssl_errors(LOG_LEVEL_ERROR, "Unable to create BIO structure");
1070 if (BIO_get_ssl(ssl_attrs->bio, &ssl) != 1)
1072 log_ssl_errors(LOG_LEVEL_ERROR, "BIO_get_ssl failed");
1077 if (!SSL_set_fd(ssl, csp->server_connection.sfd))
1079 log_ssl_errors(LOG_LEVEL_ERROR, "SSL_set_fd failed");
1084 if (csp->config->cipher_list != NULL)
1086 if (!SSL_set_cipher_list(ssl, csp->config->cipher_list))
1088 log_ssl_errors(LOG_LEVEL_ERROR,
1089 "Setting the cipher list '%s' for the server connection failed",
1090 csp->config->cipher_list);
1097 * Set the hostname to check against the received server certificate
1099 #if OPENSSL_VERSION_NUMBER > 0x10100000L
1100 if (!SSL_set1_host(ssl, csp->http->host))
1102 log_ssl_errors(LOG_LEVEL_ERROR, "SSL_set1_host failed");
1107 if (host_is_ip_address(csp->http->host))
1109 if (X509_VERIFY_PARAM_set1_ip_asc(ssl->param, csp->http->host) != 1)
1111 log_ssl_errors(LOG_LEVEL_ERROR,
1112 "X509_VERIFY_PARAM_set1_ip_asc() failed");
1119 if (X509_VERIFY_PARAM_set1_host(ssl->param, csp->http->host, 0) != 1)
1121 log_ssl_errors(LOG_LEVEL_ERROR,
1122 "X509_VERIFY_PARAM_set1_host() failed");
1129 if (!SSL_set_tlsext_host_name(ssl, csp->http->host))
1131 log_ssl_errors(LOG_LEVEL_ERROR, "SSL_set_tlsext_host_name failed");
1137 * Handshake with server
1139 log_error(LOG_LEVEL_CONNECT,
1140 "Performing the TLS/SSL handshake with the server");
1142 if (BIO_do_handshake(ssl_attrs->bio) != 1)
1144 log_ssl_errors(LOG_LEVEL_ERROR,
1145 "The TLS/SSL handshake with the server failed");
1150 chain = SSL_get_peer_cert_chain(ssl);
1154 for (i = 0; i < sk_X509_num(chain); i++)
1156 if (ssl_store_cert(csp, sk_X509_value(chain, i)) != 0)
1158 log_error(LOG_LEVEL_ERROR, "ssl_store_cert failed");
1165 if (!csp->dont_verify_certificate)
1167 long verify_result = SSL_get_verify_result(ssl);
1168 if (verify_result == X509_V_OK)
1171 csp->server_cert_verification_result = SSL_CERT_VALID;
1175 csp->server_cert_verification_result = verify_result;
1176 log_error(LOG_LEVEL_ERROR,
1177 "X509 certificate verification for %s failed: %s",
1178 csp->http->hostport, X509_verify_cert_error_string(verify_result));
1184 log_error(LOG_LEVEL_CONNECT, "Server successfully connected over %s (%s).",
1185 SSL_get_version(ssl), SSL_get_cipher_name(ssl));
1188 * Server certificate chain is valid, so we can clean
1189 * chain, because we will not send it to client.
1191 free_certificate_chain(csp);
1193 csp->ssl_with_server_is_opened = 1;
1195 /* Freeing structures if connection wasn't created successfully */
1198 free_server_ssl_structures(csp);
1205 /*********************************************************************
1207 * Function : free_server_ssl_structures
1209 * Description : Frees structures used for SSL communication with server
1212 * 1 : csp = Current client state (buffers, headers, etc...)
1216 *********************************************************************/
1217 static void free_server_ssl_structures(struct client_state *csp)
1219 struct ssl_attr *ssl_attr = &csp->ssl_server_attr;
1221 if (ssl_attr->openssl_attr.bio)
1223 BIO_free_all(ssl_attr->openssl_attr.bio);
1225 if (ssl_attr->openssl_attr.ctx)
1227 SSL_CTX_free(ssl_attr->openssl_attr.ctx);
1232 /*********************************************************************
1234 * Function : log_ssl_errors
1236 * Description : Log SSL errors
1239 * 1 : debuglevel = Debug level
1240 * 2 : desc = Error description
1244 *********************************************************************/
1245 static void log_ssl_errors(int debuglevel, const char* fmt, ...)
1247 unsigned long err_code;
1248 char prefix[ERROR_BUF_SIZE];
1250 va_start(args, fmt);
1251 vsnprintf(prefix, sizeof(prefix), fmt, args);
1254 while ((err_code = ERR_get_error()))
1256 char err_buf[ERROR_BUF_SIZE];
1258 ERR_error_string_n(err_code, err_buf, sizeof(err_buf));
1259 log_error(debuglevel, "%s: %s", prefix, err_buf);
1263 * In case if called by mistake and there were
1264 * no TLS/SSL errors let's report it to the log.
1268 log_error(debuglevel, "%s: no TLS/SSL errors detected", prefix);
1273 /*********************************************************************
1275 * Function : ssl_base64_encode
1277 * Description : Encode a buffer into base64 format.
1280 * 1 : dst = Destination buffer
1281 * 2 : dlen = Destination buffer length
1282 * 3 : olen = Number of bytes written
1283 * 4 : src = Source buffer
1284 * 5 : slen = Amount of data to be encoded
1286 * Returns : 0 on success, error code othervise
1288 *********************************************************************/
1289 extern int ssl_base64_encode(unsigned char *dst, size_t dlen, size_t *olen,
1290 const unsigned char *src, size_t slen)
1292 *olen = 4 * ((slen/3) + ((slen%3) ? 1 : 0)) + 1;
1297 *olen = (size_t)EVP_EncodeBlock(dst, src, (int)slen) + 1;
1302 /*********************************************************************
1304 * Function : close_file_stream
1306 * Description : Close file stream, report error on close error
1309 * 1 : f = file stream to close
1310 * 2 : path = path for error report
1314 *********************************************************************/
1315 static void close_file_stream(FILE *f, const char *path)
1319 log_error(LOG_LEVEL_ERROR,
1320 "Error closing file %s: %s", path, strerror(errno));
1325 /*********************************************************************
1327 * Function : write_certificate
1329 * Description : Writes certificate into file.
1332 * 1 : crt = certificate to write into file
1333 * 2 : output_file = path to save certificate file
1336 * Returns : 1 on success success or negative value
1338 *********************************************************************/
1339 static int write_certificate(X509 *crt, const char *output_file)
1345 * Saving certificate into file
1347 if ((f = fopen(output_file, "w")) == NULL)
1349 log_error(LOG_LEVEL_ERROR, "Opening file %s to save certificate failed",
1354 ret = PEM_write_X509(f, crt);
1357 log_ssl_errors(LOG_LEVEL_ERROR,
1358 "Writing certificate into file %s failed", output_file);
1362 close_file_stream(f, output_file);
1367 /*********************************************************************
1369 * Function : write_private_key
1371 * Description : Writes private key into file and copies saved
1372 * content into given pointer to string. If function
1373 * returns 0 for success, this copy must be freed by
1377 * 1 : key = key to write into file
1378 * 2 : ret_buf = pointer to string with created key file content
1379 * 3 : key_file_path = path where to save key file
1381 * Returns : Length of written private key on success or negative value
1384 *********************************************************************/
1385 static int write_private_key(EVP_PKEY *key, char **ret_buf,
1386 const char *key_file_path)
1388 size_t len = 0; /* Length of created key */
1389 FILE *f = NULL; /* File to save certificate */
1391 BIO *bio_mem = BIO_new(BIO_s_mem());
1392 char *bio_mem_data = 0;
1394 if (bio_mem == NULL)
1396 log_ssl_errors(LOG_LEVEL_ERROR, "write_private_key memory allocation failure");
1401 * Writing private key into PEM string
1403 if (!PEM_write_bio_PrivateKey(bio_mem, key, NULL, NULL, 0, NULL, NULL))
1405 log_ssl_errors(LOG_LEVEL_ERROR,
1406 "Writing private key into PEM string failed");
1411 len = (size_t)BIO_get_mem_data(bio_mem, &bio_mem_data);
1413 /* Initializing buffer for key file content */
1414 *ret_buf = zalloc_or_die(len + 1);
1415 (*ret_buf)[len] = 0;
1417 strncpy(*ret_buf, bio_mem_data, len);
1420 * Saving key into file
1422 if ((f = fopen(key_file_path, "wb")) == NULL)
1424 log_error(LOG_LEVEL_ERROR,
1425 "Opening file %s to save private key failed: %E",
1431 if (fwrite(*ret_buf, 1, len, f) != len)
1433 log_error(LOG_LEVEL_ERROR,
1434 "Writing private key into file %s failed",
1436 close_file_stream(f, key_file_path);
1441 close_file_stream(f, key_file_path);
1455 /*********************************************************************
1457 * Function : generate_key
1459 * Description : Tests if private key for host saved in csp already
1460 * exists. If this file doesn't exists, a new key is
1461 * generated and saved in a file. The generated key is also
1462 * copied into given parameter key_buf, which must be then
1463 * freed by caller. If file with key exists, key_buf
1464 * contain NULL and no private key is generated.
1467 * 1 : csp = Current client state (buffers, headers, etc...)
1468 * 2 : key_buf = buffer to save new generated key
1470 * Returns : -1 => Error while generating private key
1471 * 0 => Key already exists
1472 * >0 => Length of generated private key
1474 *********************************************************************/
1475 static int generate_key(struct client_state *csp, char **key_buf)
1478 char* key_file_path;
1483 key_file_path = make_certs_path(csp->config->certificate_directory,
1484 (char *)csp->http->hash_of_host_hex, KEY_FILE_TYPE);
1485 if (key_file_path == NULL)
1491 * Test if key already exists. If so, we don't have to create it again.
1493 if (file_exists(key_file_path) == 1)
1495 freez(key_file_path);
1501 key = EVP_PKEY_new();
1502 if (exp == NULL || rsa == NULL || key == NULL)
1504 log_ssl_errors(LOG_LEVEL_ERROR, "RSA key memory allocation failure");
1509 if (BN_set_word(exp, RSA_KEY_PUBLIC_EXPONENT) != 1)
1511 log_ssl_errors(LOG_LEVEL_ERROR, "Setting RSA key exponent failed");
1516 ret = RSA_generate_key_ex(rsa, RSA_KEYSIZE, exp, NULL);
1519 log_ssl_errors(LOG_LEVEL_ERROR, "RSA key generation failure");
1524 if (!EVP_PKEY_set1_RSA(key, rsa))
1526 log_ssl_errors(LOG_LEVEL_ERROR,
1527 "Error assigning RSA key pair to PKEY structure");
1533 * Exporting private key into file
1535 if ((ret = write_private_key(key, key_buf, key_file_path)) < 0)
1537 log_error(LOG_LEVEL_ERROR,
1538 "Writing private key into file %s failed", key_file_path);
1545 * Freeing used variables
1559 freez(key_file_path);
1565 /*********************************************************************
1567 * Function : ssl_certificate_load
1569 * Description : Loads certificate from file.
1572 * 1 : cert_path = The certificate path to load
1574 * Returns : NULL => error loading certificate,
1575 * pointer to certificate instance otherwise
1577 *********************************************************************/
1578 static X509 *ssl_certificate_load(const char *cert_path)
1581 FILE *cert_f = NULL;
1583 if (!(cert_f = fopen(cert_path, "r")))
1585 log_error(LOG_LEVEL_ERROR,
1586 "Error opening certificate file %s: %s", cert_path, strerror(errno));
1590 if (!(cert = PEM_read_X509(cert_f, NULL, NULL, NULL)))
1592 log_ssl_errors(LOG_LEVEL_ERROR,
1593 "Error reading certificate file %s", cert_path);
1596 close_file_stream(cert_f, cert_path);
1601 /*********************************************************************
1603 * Function : ssl_certificate_is_invalid
1605 * Description : Checks whether or not a certificate is valid.
1606 * Currently only checks that the certificate can be
1607 * parsed and that the "valid to" date is in the future.
1610 * 1 : cert_file = The certificate to check
1612 * Returns : 0 => The certificate is valid.
1613 * 1 => The certificate is invalid
1615 *********************************************************************/
1616 static int ssl_certificate_is_invalid(const char *cert_file)
1622 if (!(cert = ssl_certificate_load(cert_file)))
1627 ret = X509_cmp_current_time(X509_get_notAfter(cert));
1630 log_ssl_errors(LOG_LEVEL_ERROR,
1631 "Error checking certificate %s validity", cert_file);
1637 return ret == -1 ? 1 : 0;
1641 /*********************************************************************
1643 * Function : set_x509_ext
1645 * Description : Sets the X509V3 extension data
1648 * 1 : cert = The certificate to modify
1649 * 2 : issuer = Issuer certificate
1650 * 3 : nid = OpenSSL NID
1651 * 4 : value = extension value
1653 * Returns : 0 => Error while setting extension data
1656 *********************************************************************/
1657 static int set_x509_ext(X509 *cert, X509 *issuer, int nid, char *value)
1659 X509_EXTENSION *ext = NULL;
1663 X509V3_set_ctx(&ctx, issuer, cert, NULL, NULL, 0);
1664 ext = X509V3_EXT_conf_nid(NULL, &ctx, nid, value);
1667 log_ssl_errors(LOG_LEVEL_ERROR, "X509V3_EXT_conf_nid failure");
1671 if (!X509_add_ext(cert, ext, -1))
1673 log_ssl_errors(LOG_LEVEL_ERROR, "X509_add_ext failure");
1681 X509_EXTENSION_free(ext);
1687 /*********************************************************************
1689 * Function : set_subject_alternative_name
1691 * Description : Sets the Subject Alternative Name extension to a cert
1694 * 1 : cert = The certificate to modify
1695 * 2 : issuer = Issuer certificate
1696 * 3 : hostname = The hostname to add
1698 * Returns : 0 => Error while creating certificate.
1701 *********************************************************************/
1702 static int set_subject_alternative_name(X509 *cert, X509 *issuer, const char *hostname)
1704 size_t altname_len = strlen(hostname) + sizeof(CERTIFICATE_ALT_NAME_PREFIX);
1705 char alt_name_buf[altname_len];
1707 snprintf(alt_name_buf, sizeof(alt_name_buf),
1708 CERTIFICATE_ALT_NAME_PREFIX"%s", hostname);
1709 return set_x509_ext(cert, issuer, NID_subject_alt_name, alt_name_buf);
1713 /*********************************************************************
1715 * Function : generate_host_certificate
1717 * Description : Creates certificate file in presetted directory.
1718 * If certificate already exists, no other certificate
1719 * will be created. Subject of certificate is named
1720 * by csp->http->host from parameter. This function also
1721 * triggers generating of private key for new certificate.
1724 * 1 : csp = Current client state (buffers, headers, etc...)
1726 * Returns : -1 => Error while creating certificate.
1727 * 0 => Certificate already exists.
1728 * 1 => Certificate created
1730 *********************************************************************/
1731 static int generate_host_certificate(struct client_state *csp)
1733 char *key_buf = NULL; /* Buffer for created key */
1734 X509 *issuer_cert = NULL;
1737 EVP_PKEY *loaded_subject_key = NULL;
1738 EVP_PKEY *loaded_issuer_key = NULL;
1739 X509_NAME *issuer_name;
1740 X509_NAME *subject_name = NULL;
1741 ASN1_TIME *asn_time = NULL;
1742 ASN1_INTEGER *serial = NULL;
1743 BIGNUM *serial_num = NULL;
1746 cert_options cert_opt;
1747 char cert_valid_from[VALID_DATETIME_BUFLEN];
1748 char cert_valid_to[VALID_DATETIME_BUFLEN];
1750 /* Paths to keys and certificates needed to create certificate */
1751 cert_opt.issuer_key = NULL;
1752 cert_opt.subject_key = NULL;
1753 cert_opt.issuer_crt = NULL;
1755 cert_opt.output_file = make_certs_path(csp->config->certificate_directory,
1756 (const char *)csp->http->hash_of_host_hex, CERT_FILE_TYPE);
1757 if (cert_opt.output_file == NULL)
1762 cert_opt.subject_key = make_certs_path(csp->config->certificate_directory,
1763 (const char *)csp->http->hash_of_host_hex, KEY_FILE_TYPE);
1764 if (cert_opt.subject_key == NULL)
1766 freez(cert_opt.output_file);
1770 if (enforce_sane_certificate_state(cert_opt.output_file,
1771 cert_opt.subject_key))
1773 freez(cert_opt.output_file);
1774 freez(cert_opt.subject_key);
1779 if (file_exists(cert_opt.output_file) == 1)
1781 /* The file exists, but is it valid? */
1782 if (ssl_certificate_is_invalid(cert_opt.output_file))
1784 log_error(LOG_LEVEL_CONNECT,
1785 "Certificate %s is no longer valid. Removing it.",
1786 cert_opt.output_file);
1787 if (unlink(cert_opt.output_file))
1789 log_error(LOG_LEVEL_ERROR, "Failed to unlink %s: %E",
1790 cert_opt.output_file);
1792 freez(cert_opt.output_file);
1793 freez(cert_opt.subject_key);
1797 if (unlink(cert_opt.subject_key))
1799 log_error(LOG_LEVEL_ERROR, "Failed to unlink %s: %E",
1800 cert_opt.subject_key);
1802 freez(cert_opt.output_file);
1803 freez(cert_opt.subject_key);
1810 freez(cert_opt.output_file);
1811 freez(cert_opt.subject_key);
1818 * Create key for requested host
1820 int subject_key_len = generate_key(csp, &key_buf);
1821 if (subject_key_len < 0)
1823 freez(cert_opt.output_file);
1824 freez(cert_opt.subject_key);
1825 log_error(LOG_LEVEL_ERROR, "Key generating failed");
1830 * Converting unsigned long serial number to char * serial number.
1831 * We must compute length of serial number in string + terminating null.
1833 unsigned long certificate_serial = get_certificate_serial(csp);
1834 unsigned long certificate_serial_time = (unsigned long)time(NULL);
1835 int serial_num_size = snprintf(NULL, 0, "%lu%lu",
1836 certificate_serial_time, certificate_serial) + 1;
1837 if (serial_num_size <= 0)
1839 serial_num_size = 1;
1842 char serial_num_text[serial_num_size]; /* Buffer for serial number */
1843 ret = snprintf(serial_num_text, (size_t)serial_num_size, "%lu%lu",
1844 certificate_serial_time, certificate_serial);
1845 if (ret < 0 || ret >= serial_num_size)
1847 log_error(LOG_LEVEL_ERROR,
1848 "Converting certificate serial number into string failed");
1854 * Preparing parameters for certificate
1856 subject_name = X509_NAME_new();
1859 log_ssl_errors(LOG_LEVEL_ERROR, "RSA key memory allocation failure");
1864 if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_COMMON_NAME_FCODE,
1865 MBSTRING_ASC, (void *)csp->http->host, -1, -1, 0))
1867 log_ssl_errors(LOG_LEVEL_ERROR,
1868 "X509 subject name (code: %s, val: %s) error",
1869 CERT_PARAM_COMMON_NAME_FCODE, csp->http->host);
1873 if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_ORGANIZATION_FCODE,
1874 MBSTRING_ASC, (void *)csp->http->host, -1, -1, 0))
1876 log_ssl_errors(LOG_LEVEL_ERROR,
1877 "X509 subject name (code: %s, val: %s) error",
1878 CERT_PARAM_ORGANIZATION_FCODE, csp->http->host);
1882 if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_ORG_UNIT_FCODE,
1883 MBSTRING_ASC, (void *)csp->http->host, -1, -1, 0))
1885 log_ssl_errors(LOG_LEVEL_ERROR,
1886 "X509 subject name (code: %s, val: %s) error",
1887 CERT_PARAM_ORG_UNIT_FCODE, csp->http->host);
1891 if (!X509_NAME_add_entry_by_txt(subject_name, CERT_PARAM_COUNTRY_FCODE,
1892 MBSTRING_ASC, (void *)CERT_PARAM_COUNTRY_CODE, -1, -1, 0))
1894 log_ssl_errors(LOG_LEVEL_ERROR,
1895 "X509 subject name (code: %s, val: %s) error",
1896 CERT_PARAM_COUNTRY_FCODE, csp->http->host);
1901 cert_opt.issuer_crt = csp->config->ca_cert_file;
1902 cert_opt.issuer_key = csp->config->ca_key_file;
1904 if (get_certificate_valid_from_date(cert_valid_from,
1905 sizeof(cert_valid_from), VALID_DATETIME_FMT)
1906 || get_certificate_valid_to_date(cert_valid_to,
1907 sizeof(cert_valid_to), VALID_DATETIME_FMT))
1909 log_error(LOG_LEVEL_ERROR, "Generating one of the validity dates failed");
1914 cert_opt.subject_pwd = CERT_SUBJECT_PASSWORD;
1915 cert_opt.issuer_pwd = csp->config->ca_password;
1916 cert_opt.not_before = cert_valid_from;
1917 cert_opt.not_after = cert_valid_to;
1918 cert_opt.serial = serial_num_text;
1919 cert_opt.max_pathlen = -1;
1922 * Test if the private key was already created.
1923 * XXX: Can this still happen?
1925 if (subject_key_len == 0)
1927 log_error(LOG_LEVEL_ERROR, "Subject key was already created");
1933 * Parse serial to MPI
1935 serial_num = BN_new();
1938 log_error(LOG_LEVEL_ERROR, "generate_host_certificate: memory error");
1942 if (!BN_dec2bn(&serial_num, cert_opt.serial))
1944 log_ssl_errors(LOG_LEVEL_ERROR, "Failed to parse serial %s", cert_opt.serial);
1949 if (!(serial = BN_to_ASN1_INTEGER(serial_num, NULL)))
1951 log_ssl_errors(LOG_LEVEL_ERROR, "Failed to generate serial ASN1 representation");
1957 * Loading certificates
1959 if (!(issuer_cert = ssl_certificate_load(cert_opt.issuer_crt)))
1961 log_error(LOG_LEVEL_ERROR, "Loading issuer certificate %s failed",
1962 cert_opt.issuer_crt);
1967 issuer_name = X509_get_issuer_name(issuer_cert);
1970 * Loading keys from file or from buffer
1972 if (key_buf != NULL && subject_key_len > 0)
1974 pk_bio = BIO_new_mem_buf(key_buf, subject_key_len);
1976 else if (!(pk_bio = BIO_new_file(cert_opt.subject_key, "r")))
1978 log_ssl_errors(LOG_LEVEL_ERROR,
1979 "Failure opening subject key %s BIO", cert_opt.subject_key);
1984 loaded_subject_key = PEM_read_bio_PrivateKey(pk_bio, NULL, NULL,
1985 (void *)cert_opt.subject_pwd);
1986 if (!loaded_subject_key)
1988 log_ssl_errors(LOG_LEVEL_ERROR, "Parsing subject key %s failed",
1989 cert_opt.subject_key);
1994 if (!BIO_free(pk_bio))
1996 log_ssl_errors(LOG_LEVEL_ERROR, "Error closing subject key BIO");
1999 if (!(pk_bio = BIO_new_file(cert_opt.issuer_key, "r")))
2001 log_ssl_errors(LOG_LEVEL_ERROR, "Failure opening issuer key %s BIO",
2002 cert_opt.issuer_key);
2007 loaded_issuer_key = PEM_read_bio_PrivateKey(pk_bio, NULL, NULL,
2008 (void *)cert_opt.issuer_pwd);
2009 if (!loaded_issuer_key)
2011 log_ssl_errors(LOG_LEVEL_ERROR, "Parsing issuer key %s failed",
2012 cert_opt.subject_key);
2020 log_ssl_errors(LOG_LEVEL_ERROR, "Certificate allocation error");
2025 if (!X509_set_version(cert, CERTIFICATE_VERSION))
2027 log_ssl_errors(LOG_LEVEL_ERROR, "X509_set_version failed");
2033 * Setting parameters of signed certificate
2035 if (!X509_set_pubkey(cert, loaded_subject_key))
2037 log_ssl_errors(LOG_LEVEL_ERROR,
2038 "Setting public key in signed certificate failed");
2043 if (!X509_set_subject_name(cert, subject_name))
2045 log_ssl_errors(LOG_LEVEL_ERROR,
2046 "Setting subject name in signed certificate failed");
2051 if (!X509_set_issuer_name(cert, issuer_name))
2053 log_ssl_errors(LOG_LEVEL_ERROR,
2054 "Setting issuer name in signed certificate failed");
2059 if (!X509_set_serialNumber(cert, serial))
2061 log_ssl_errors(LOG_LEVEL_ERROR,
2062 "Setting serial number in signed certificate failed");
2067 asn_time = ASN1_TIME_new();
2070 log_ssl_errors(LOG_LEVEL_ERROR, "ASN1 time memory allocation failure");
2075 if (!ASN1_TIME_set_string(asn_time, cert_opt.not_after))
2077 log_ssl_errors(LOG_LEVEL_ERROR, "ASN1 time [%s] encode error", cert_opt.not_after);
2082 if (!X509_set1_notAfter(cert, asn_time))
2084 log_ssl_errors(LOG_LEVEL_ERROR,
2085 "Setting valid not after in signed certificate failed");
2090 if (!ASN1_TIME_set_string(asn_time, cert_opt.not_before))
2092 log_ssl_errors(LOG_LEVEL_ERROR, "ASN1 time encode error");
2097 if (!X509_set1_notBefore(cert, asn_time))
2099 log_ssl_errors(LOG_LEVEL_ERROR,
2100 "Setting valid not before in signed certificate failed");
2105 if (!set_x509_ext(cert, issuer_cert, NID_basic_constraints, CERTIFICATE_BASIC_CONSTRAINTS))
2107 log_ssl_errors(LOG_LEVEL_ERROR, "Setting the basicConstraints extension "
2108 "in signed certificate failed");
2113 if (!set_x509_ext(cert, issuer_cert, NID_subject_key_identifier, CERTIFICATE_SUBJECT_KEY))
2115 log_ssl_errors(LOG_LEVEL_ERROR,
2116 "Setting the Subject Key Identifier extension failed");
2121 if (!set_x509_ext(cert, issuer_cert, NID_authority_key_identifier, CERTIFICATE_AUTHORITY_KEY))
2123 log_ssl_errors(LOG_LEVEL_ERROR,
2124 "Setting the Authority Key Identifier extension failed");
2129 if (!host_is_ip_address(csp->http->host) &&
2130 !set_subject_alternative_name(cert, issuer_cert, csp->http->host))
2132 log_ssl_errors(LOG_LEVEL_ERROR,
2133 "Setting the Subject Alt Name extension failed");
2138 if (!X509_sign(cert, loaded_issuer_key, EVP_sha256()))
2140 log_ssl_errors(LOG_LEVEL_ERROR, "Signing certificate failed");
2146 * Writing certificate into file
2148 if (write_certificate(cert, cert_opt.output_file) < 0)
2150 log_error(LOG_LEVEL_ERROR, "Writing certificate into file failed");
2159 * Freeing used structures
2163 X509_free(issuer_cert);
2169 if (pk_bio && !BIO_free(pk_bio))
2171 log_ssl_errors(LOG_LEVEL_ERROR, "Error closing pk BIO");
2173 if (loaded_subject_key)
2175 EVP_PKEY_free(loaded_subject_key);
2177 if (loaded_issuer_key)
2179 EVP_PKEY_free(loaded_issuer_key);
2183 X509_NAME_free(subject_name);
2187 ASN1_TIME_free(asn_time);
2191 BN_free(serial_num);
2195 ASN1_INTEGER_free(serial);
2197 freez(cert_opt.subject_key);
2198 freez(cert_opt.output_file);
2205 /*********************************************************************
2207 * Function : ssl_crt_verify_info
2209 * Description : Returns an informational string about the verification
2210 * status of a certificate.
2213 * 1 : buf = Buffer to write to
2214 * 2 : size = Maximum size of buffer
2215 * 3 : csp = client state
2219 *********************************************************************/
2220 extern void ssl_crt_verify_info(char *buf, size_t size, struct client_state *csp)
2222 strncpy(buf, X509_verify_cert_error_string(csp->server_cert_verification_result), size);
2227 #ifdef FEATURE_GRACEFUL_TERMINATION
2228 /*********************************************************************
2230 * Function : ssl_release
2232 * Description : Release all SSL resources
2238 *********************************************************************/
2239 extern void ssl_release(void)
2241 if (ssl_inited == 1)
2243 #if OPENSSL_VERSION_NUMBER >= 0x1000200fL
2244 #ifndef LIBRESSL_VERSION_NUMBER
2245 #ifndef OPENSSL_NO_COMP
2246 SSL_COMP_free_compression_methods();
2250 CONF_modules_free();
2251 CONF_modules_unload(1);
2252 #ifndef OPENSSL_NO_COMP
2253 COMP_zlib_cleanup();
2259 CRYPTO_cleanup_all_ex_data();
2262 #endif /* def FEATURE_GRACEFUL_TERMINATION */