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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:01:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:01:30 +0000
commit6beeb1b708550be0d4a53b272283e17e5e35fe17 (patch)
tree1ce8673d4aaa948e5554000101f46536a1e4cc29 /modules/ssl/ssl_engine_init.c
parentInitial commit. (diff)
downloadapache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.tar.xz
apache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.zip
Adding upstream version 2.4.57.upstream/2.4.57upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'modules/ssl/ssl_engine_init.c')
-rw-r--r--modules/ssl/ssl_engine_init.c2367
1 files changed, 2367 insertions, 0 deletions
diff --git a/modules/ssl/ssl_engine_init.c b/modules/ssl/ssl_engine_init.c
new file mode 100644
index 0000000..825621d
--- /dev/null
+++ b/modules/ssl/ssl_engine_init.c
@@ -0,0 +1,2367 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* _ _
+ * _ __ ___ ___ __| | ___ ___| | mod_ssl
+ * | '_ ` _ \ / _ \ / _` | / __/ __| | Apache Interface to OpenSSL
+ * | | | | | | (_) | (_| | \__ \__ \ |
+ * |_| |_| |_|\___/ \__,_|___|___/___/_|
+ * |_____|
+ * ssl_engine_init.c
+ * Initialization of Servers
+ */
+ /* ``Recursive, adj.;
+ see Recursive.''
+ -- Unknown */
+#include "ssl_private.h"
+#include "mod_ssl.h"
+#include "mod_ssl_openssl.h"
+#include "mpm_common.h"
+#include "mod_md.h"
+
+static apr_status_t ssl_init_ca_cert_path(server_rec *, apr_pool_t *, const char *,
+ STACK_OF(X509_NAME) *, STACK_OF(X509_INFO) *);
+
+APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(ssl, SSL, int, init_server,
+ (server_rec *s,apr_pool_t *p,int is_proxy,SSL_CTX *ctx),
+ (s,p,is_proxy,ctx), OK, DECLINED)
+
+APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(ssl, SSL, int, add_cert_files,
+ (server_rec *s, apr_pool_t *p,
+ apr_array_header_t *cert_files, apr_array_header_t *key_files),
+ (s, p, cert_files, key_files),
+ OK, DECLINED)
+
+APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(ssl, SSL, int, add_fallback_cert_files,
+ (server_rec *s, apr_pool_t *p,
+ apr_array_header_t *cert_files, apr_array_header_t *key_files),
+ (s, p, cert_files, key_files),
+ OK, DECLINED)
+
+APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(ssl, SSL, int, answer_challenge,
+ (conn_rec *c, const char *server_name,
+ X509 **pcert, EVP_PKEY **pkey),
+ (c, server_name, pcert, pkey),
+ DECLINED, DECLINED)
+
+
+/* _________________________________________________________________
+**
+** Module Initialization
+** _________________________________________________________________
+*/
+
+#ifdef HAVE_ECC
+#define KEYTYPES "RSA, DSA or ECC"
+#else
+#define KEYTYPES "RSA or DSA"
+#endif
+
+#if MODSSL_USE_OPENSSL_PRE_1_1_API
+/* OpenSSL Pre-1.1.0 compatibility */
+/* Taken from OpenSSL 1.1.0 snapshot 20160410 */
+static int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g)
+{
+ /* q is optional */
+ if (p == NULL || g == NULL)
+ return 0;
+ BN_free(dh->p);
+ BN_free(dh->q);
+ BN_free(dh->g);
+ dh->p = p;
+ dh->q = q;
+ dh->g = g;
+
+ if (q != NULL) {
+ dh->length = BN_num_bits(q);
+ }
+
+ return 1;
+}
+
+/*
+ * Grab well-defined DH parameters from OpenSSL, see the BN_get_rfc*
+ * functions in <openssl/bn.h> for all available primes.
+ */
+static DH *make_dh_params(BIGNUM *(*prime)(BIGNUM *))
+{
+ DH *dh = DH_new();
+ BIGNUM *p, *g;
+
+ if (!dh) {
+ return NULL;
+ }
+ p = prime(NULL);
+ g = BN_new();
+ if (g != NULL) {
+ BN_set_word(g, 2);
+ }
+ if (!p || !g || !DH_set0_pqg(dh, p, NULL, g)) {
+ DH_free(dh);
+ BN_free(p);
+ BN_free(g);
+ return NULL;
+ }
+ return dh;
+}
+
+/* Storage and initialization for DH parameters. */
+static struct dhparam {
+ BIGNUM *(*const prime)(BIGNUM *); /* function to generate... */
+ DH *dh; /* ...this, used for keys.... */
+ const unsigned int min; /* ...of length >= this. */
+} dhparams[] = {
+ { BN_get_rfc3526_prime_8192, NULL, 6145 },
+ { BN_get_rfc3526_prime_6144, NULL, 4097 },
+ { BN_get_rfc3526_prime_4096, NULL, 3073 },
+ { BN_get_rfc3526_prime_3072, NULL, 2049 },
+ { BN_get_rfc3526_prime_2048, NULL, 1025 },
+ { BN_get_rfc2409_prime_1024, NULL, 0 }
+};
+
+static void init_dh_params(void)
+{
+ unsigned n;
+
+ for (n = 0; n < sizeof(dhparams)/sizeof(dhparams[0]); n++)
+ dhparams[n].dh = make_dh_params(dhparams[n].prime);
+}
+
+static void free_dh_params(void)
+{
+ unsigned n;
+
+ /* DH_free() is a noop for a NULL parameter, so these are harmless
+ * in the (unexpected) case where these variables are already
+ * NULL. */
+ for (n = 0; n < sizeof(dhparams)/sizeof(dhparams[0]); n++) {
+ DH_free(dhparams[n].dh);
+ dhparams[n].dh = NULL;
+ }
+}
+
+/* Hand out the same DH structure though once generated as we leak
+ * memory otherwise and freeing the structure up after use would be
+ * hard to track and in fact is not needed at all as it is safe to
+ * use the same parameters over and over again security wise (in
+ * contrast to the keys itself) and code safe as the returned structure
+ * is duplicated by OpenSSL anyway. Hence no modification happens
+ * to our copy. */
+DH *modssl_get_dh_params(unsigned keylen)
+{
+ unsigned n;
+
+ for (n = 0; n < sizeof(dhparams)/sizeof(dhparams[0]); n++)
+ if (keylen >= dhparams[n].min)
+ return dhparams[n].dh;
+
+ return NULL; /* impossible to reach. */
+}
+#endif
+
+static void ssl_add_version_components(apr_pool_t *ptemp, apr_pool_t *pconf,
+ server_rec *s)
+{
+ char *modver = ssl_var_lookup(ptemp, s, NULL, NULL, "SSL_VERSION_INTERFACE");
+ char *libver = ssl_var_lookup(ptemp, s, NULL, NULL, "SSL_VERSION_LIBRARY");
+ char *incver = ssl_var_lookup(ptemp, s, NULL, NULL,
+ "SSL_VERSION_LIBRARY_INTERFACE");
+
+ ap_add_version_component(pconf, libver);
+
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, APLOGNO(01876)
+ "%s compiled against Server: %s, Library: %s",
+ modver, AP_SERVER_BASEVERSION, incver);
+}
+
+/* _________________________________________________________________
+**
+** Let other answer special connection attempts.
+** Used in ACME challenge handling by mod_md.
+** _________________________________________________________________
+*/
+
+int ssl_is_challenge(conn_rec *c, const char *servername,
+ X509 **pcert, EVP_PKEY **pkey,
+ const char **pcert_pem, const char **pkey_pem)
+{
+ *pcert = NULL;
+ *pkey = NULL;
+ *pcert_pem = *pkey_pem = NULL;
+ if (ap_ssl_answer_challenge(c, servername, pcert_pem, pkey_pem)) {
+ return 1;
+ }
+ else if (OK == ssl_run_answer_challenge(c, servername, pcert, pkey)) {
+ return 1;
+ }
+ return 0;
+}
+
+#ifdef HAVE_FIPS
+static apr_status_t modssl_fips_cleanup(void *data)
+{
+ modssl_fips_enable(0);
+ return APR_SUCCESS;
+}
+#endif
+
+/*
+ * Per-module initialization
+ */
+apr_status_t ssl_init_Module(apr_pool_t *p, apr_pool_t *plog,
+ apr_pool_t *ptemp,
+ server_rec *base_server)
+{
+ SSLModConfigRec *mc = myModConfig(base_server);
+ SSLSrvConfigRec *sc;
+ server_rec *s;
+ apr_status_t rv;
+ apr_array_header_t *pphrases;
+
+ if (SSLeay() < MODSSL_LIBRARY_VERSION) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, base_server, APLOGNO(01882)
+ "Init: this version of mod_ssl was compiled against "
+ "a newer library (%s, version currently loaded is %s)"
+ " - may result in undefined or erroneous behavior",
+ MODSSL_LIBRARY_TEXT, MODSSL_LIBRARY_DYNTEXT);
+ }
+
+ /* We initialize mc->pid per-process in the child init,
+ * but it should be initialized for startup before we
+ * call ssl_rand_seed() below.
+ */
+ mc->pid = getpid();
+
+ /*
+ * Let us cleanup on restarts and exits
+ */
+ apr_pool_cleanup_register(p, base_server,
+ ssl_init_ModuleKill,
+ apr_pool_cleanup_null);
+
+ /*
+ * Any init round fixes the global config
+ */
+ ssl_config_global_create(base_server); /* just to avoid problems */
+ ssl_config_global_fix(mc);
+
+ /*
+ * try to fix the configuration and open the dedicated SSL
+ * logfile as early as possible
+ */
+ for (s = base_server; s; s = s->next) {
+ sc = mySrvConfig(s);
+
+ if (sc->server) {
+ sc->server->sc = sc;
+ }
+
+ /*
+ * Create the server host:port string because we need it a lot
+ */
+ if (sc->vhost_id) {
+ /* already set. This should only happen if this config rec is
+ * shared with another server. Argh! */
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(10104)
+ "%s, SSLSrvConfigRec shared from %s",
+ ssl_util_vhostid(p, s), sc->vhost_id);
+ }
+ sc->vhost_id = ssl_util_vhostid(p, s);
+ sc->vhost_id_len = strlen(sc->vhost_id);
+
+ /* Default to enabled if SSLEngine is not set explicitly, and
+ * the protocol is https. */
+ if (ap_get_server_protocol(s)
+ && strcmp("https", ap_get_server_protocol(s)) == 0
+ && sc->enabled == SSL_ENABLED_UNSET
+ && (!apr_is_empty_array(sc->server->pks->cert_files))) {
+ sc->enabled = SSL_ENABLED_TRUE;
+ }
+
+ /* Fix up stuff that may not have been set. If sc->enabled is
+ * UNSET, then SSL is disabled on this vhost. */
+ if (sc->enabled == SSL_ENABLED_UNSET) {
+ sc->enabled = SSL_ENABLED_FALSE;
+ }
+
+ if (sc->session_cache_timeout == UNSET) {
+ sc->session_cache_timeout = SSL_SESSION_CACHE_TIMEOUT;
+ }
+
+ if (sc->server && sc->server->pphrase_dialog_type == SSL_PPTYPE_UNSET) {
+ sc->server->pphrase_dialog_type = SSL_PPTYPE_BUILTIN;
+ }
+ }
+
+#if APR_HAS_THREADS && MODSSL_USE_OPENSSL_PRE_1_1_API
+ ssl_util_thread_setup(p);
+#endif
+
+ /*
+ * SSL external crypto device ("engine") support
+ */
+#if defined(HAVE_OPENSSL_ENGINE_H) && defined(HAVE_ENGINE_INIT)
+ if ((rv = ssl_init_Engine(base_server, p)) != APR_SUCCESS) {
+ return rv;
+ }
+#endif
+
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, base_server, APLOGNO(01883)
+ "Init: Initialized %s library", MODSSL_LIBRARY_NAME);
+
+ /*
+ * Seed the Pseudo Random Number Generator (PRNG)
+ * only need ptemp here; nothing inside allocated from the pool
+ * needs to live once we return from ssl_rand_seed().
+ */
+ ssl_rand_seed(base_server, ptemp, SSL_RSCTX_STARTUP, "Init: ");
+
+#ifdef HAVE_FIPS
+ if (!modssl_fips_is_enabled() && mc->fips == TRUE) {
+ if (!modssl_fips_enable(1)) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, base_server, APLOGNO(01885)
+ "Could not enable FIPS mode");
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, base_server);
+ return ssl_die(base_server);
+ }
+
+ apr_pool_cleanup_register(p, NULL, modssl_fips_cleanup,
+ apr_pool_cleanup_null);
+ }
+
+ /* Log actual FIPS mode which the SSL library is operating under,
+ * which may have been set outside of the mod_ssl
+ * configuration. */
+ if (modssl_fips_is_enabled()) {
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, base_server, APLOGNO(01884)
+ MODSSL_LIBRARY_NAME " has FIPS mode enabled");
+ }
+ else {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, base_server, APLOGNO(01886)
+ MODSSL_LIBRARY_NAME " has FIPS mode disabled");
+ }
+#endif
+
+ /*
+ * initialize the mutex handling
+ */
+ if (!ssl_mutex_init(base_server, p)) {
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+#ifdef HAVE_OCSP_STAPLING
+ ssl_stapling_certinfo_hash_init(p);
+#endif
+
+ /*
+ * initialize session caching
+ */
+ if ((rv = ssl_scache_init(base_server, p)) != APR_SUCCESS) {
+ return rv;
+ }
+
+ pphrases = apr_array_make(ptemp, 2, sizeof(char *));
+
+ /*
+ * initialize servers
+ */
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, base_server, APLOGNO(01887)
+ "Init: Initializing (virtual) servers for SSL");
+
+ for (s = base_server; s; s = s->next) {
+ sc = mySrvConfig(s);
+ /*
+ * Either now skip this server when SSL is disabled for
+ * it or give out some information about what we're
+ * configuring.
+ */
+
+ /*
+ * Read the server certificate and key
+ */
+ if ((rv = ssl_init_ConfigureServer(s, p, ptemp, sc, pphrases))
+ != APR_SUCCESS) {
+ return rv;
+ }
+ }
+
+ if (pphrases->nelts > 0) {
+ memset(pphrases->elts, 0, pphrases->elt_size * pphrases->nelts);
+ pphrases->nelts = 0;
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, APLOGNO(02560)
+ "Init: Wiped out the queried pass phrases from memory");
+ }
+
+ /*
+ * Configuration consistency checks
+ */
+ if ((rv = ssl_init_CheckServers(base_server, ptemp)) != APR_SUCCESS) {
+ return rv;
+ }
+
+ for (s = base_server; s; s = s->next) {
+ SSLDirConfigRec *sdc = ap_get_module_config(s->lookup_defaults,
+ &ssl_module);
+
+ sc = mySrvConfig(s);
+ if (sc->enabled == SSL_ENABLED_TRUE || sc->enabled == SSL_ENABLED_OPTIONAL) {
+ if ((rv = ssl_run_init_server(s, p, 0, sc->server->ssl_ctx)) != APR_SUCCESS) {
+ return rv;
+ }
+ }
+
+ if (sdc->proxy_enabled) {
+ rv = ssl_run_init_server(s, p, 1, sdc->proxy->ssl_ctx);
+ if (rv != APR_SUCCESS) {
+ return rv;
+ }
+ }
+ }
+
+ /*
+ * Announce mod_ssl and SSL library in HTTP Server field
+ * as ``mod_ssl/X.X.X OpenSSL/X.X.X''
+ */
+ ssl_add_version_components(ptemp, p, base_server);
+
+ modssl_init_app_data2_idx(); /* for modssl_get_app_data2() at request time */
+
+#if MODSSL_USE_OPENSSL_PRE_1_1_API
+ init_dh_params();
+#else
+ init_bio_methods();
+#endif
+
+#ifdef HAVE_OPENSSL_KEYLOG
+ {
+ const char *logfn = getenv("SSLKEYLOGFILE");
+
+ if (logfn) {
+ rv = apr_file_open(&mc->keylog_file, logfn,
+ APR_FOPEN_CREATE|APR_FOPEN_WRITE|APR_FOPEN_APPEND|APR_FOPEN_LARGEFILE,
+ APR_FPROT_UREAD|APR_FPROT_UWRITE,
+ mc->pPool);
+ if (rv) {
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, rv, s, APLOGNO(10226)
+ "Could not open log file '%s' configured via SSLKEYLOGFILE",
+ logfn);
+ return rv;
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, s, APLOGNO(10227)
+ "Init: Logging SSL private key material to %s", logfn);
+ }
+ }
+#endif
+
+ return OK;
+}
+
+/*
+ * Support for external a Crypto Device ("engine"), usually
+ * a hardware accelerator card for crypto operations.
+ */
+#if defined(HAVE_OPENSSL_ENGINE_H) && defined(HAVE_ENGINE_INIT)
+apr_status_t ssl_init_Engine(server_rec *s, apr_pool_t *p)
+{
+ SSLModConfigRec *mc = myModConfig(s);
+ ENGINE *e;
+
+ if (mc->szCryptoDevice) {
+ if (!(e = ENGINE_by_id(mc->szCryptoDevice))) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01888)
+ "Init: Failed to load Crypto Device API `%s'",
+ mc->szCryptoDevice);
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return ssl_die(s);
+ }
+
+#ifdef ENGINE_CTRL_CHIL_SET_FORKCHECK
+ if (strEQ(mc->szCryptoDevice, "chil")) {
+ ENGINE_ctrl(e, ENGINE_CTRL_CHIL_SET_FORKCHECK, 1, 0, 0);
+ }
+#endif
+
+ if (!ENGINE_set_default(e, ENGINE_METHOD_ALL)) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01889)
+ "Init: Failed to enable Crypto Device API `%s'",
+ mc->szCryptoDevice);
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return ssl_die(s);
+ }
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, APLOGNO(01890)
+ "Init: loaded Crypto Device API `%s'",
+ mc->szCryptoDevice);
+
+ ENGINE_free(e);
+ }
+
+ return APR_SUCCESS;
+}
+#endif
+
+#ifdef HAVE_TLSEXT
+static apr_status_t ssl_init_ctx_tls_extensions(server_rec *s,
+ apr_pool_t *p,
+ apr_pool_t *ptemp,
+ modssl_ctx_t *mctx)
+{
+ apr_status_t rv;
+
+ /*
+ * Configure TLS extensions support
+ */
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(01893)
+ "Configuring TLS extension handling");
+
+ /*
+ * The Server Name Indication (SNI) provided by the ClientHello can be
+ * used to select the right (name-based-)vhost and its SSL configuration
+ * before the handshake takes place.
+ */
+ if (!SSL_CTX_set_tlsext_servername_callback(mctx->ssl_ctx,
+ ssl_callback_ServerNameIndication) ||
+ !SSL_CTX_set_tlsext_servername_arg(mctx->ssl_ctx, mctx)) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01894)
+ "Unable to initialize TLS servername extension "
+ "callback (incompatible OpenSSL version?)");
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return ssl_die(s);
+ }
+
+#if OPENSSL_VERSION_NUMBER >= 0x10101000L && !defined(LIBRESSL_VERSION_NUMBER)
+ /*
+ * The ClientHello callback also allows to retrieve the SNI, but since it
+ * runs at the earliest possible connection stage we can even set the TLS
+ * protocol version(s) according to the selected (name-based-)vhost, which
+ * is not possible at the SNI callback stage (due to OpenSSL internals).
+ */
+ SSL_CTX_set_client_hello_cb(mctx->ssl_ctx, ssl_callback_ClientHello, NULL);
+#endif
+
+#ifdef HAVE_OCSP_STAPLING
+ /*
+ * OCSP Stapling support, status_request extension
+ */
+ if ((mctx->pkp == FALSE) && (mctx->stapling_enabled == TRUE)) {
+ if ((rv = modssl_init_stapling(s, p, ptemp, mctx)) != APR_SUCCESS) {
+ return rv;
+ }
+ }
+#endif
+
+#ifdef HAVE_SRP
+ /*
+ * TLS-SRP support
+ */
+ if (mctx->srp_vfile != NULL) {
+ int err;
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02308)
+ "Using SRP verifier file [%s]", mctx->srp_vfile);
+
+ if (!(mctx->srp_vbase = SRP_VBASE_new(mctx->srp_unknown_user_seed))) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02309)
+ "Unable to initialize SRP verifier structure "
+ "[%s seed]",
+ mctx->srp_unknown_user_seed ? "with" : "without");
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return ssl_die(s);
+ }
+
+ err = SRP_VBASE_init(mctx->srp_vbase, mctx->srp_vfile);
+ if (err != SRP_NO_ERROR) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02310)
+ "Unable to load SRP verifier file [error %d]", err);
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return ssl_die(s);
+ }
+
+ SSL_CTX_set_srp_username_callback(mctx->ssl_ctx,
+ ssl_callback_SRPServerParams);
+ SSL_CTX_set_srp_cb_arg(mctx->ssl_ctx, mctx);
+ }
+#endif
+ return APR_SUCCESS;
+}
+#endif
+
+static apr_status_t ssl_init_ctx_protocol(server_rec *s,
+ apr_pool_t *p,
+ apr_pool_t *ptemp,
+ modssl_ctx_t *mctx)
+{
+ SSL_CTX *ctx = NULL;
+ MODSSL_SSL_METHOD_CONST SSL_METHOD *method = NULL;
+ char *cp;
+ int protocol = mctx->protocol;
+ SSLSrvConfigRec *sc = mySrvConfig(s);
+#if OPENSSL_VERSION_NUMBER >= 0x10100000L
+ int prot;
+#endif
+
+ /*
+ * Create the new per-server SSL context
+ */
+ if (protocol == SSL_PROTOCOL_NONE) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02231)
+ "No SSL protocols available [hint: SSLProtocol]");
+ return ssl_die(s);
+ }
+
+ cp = apr_pstrcat(p,
+#ifndef OPENSSL_NO_SSL3
+ (protocol & SSL_PROTOCOL_SSLV3 ? "SSLv3, " : ""),
+#endif
+ (protocol & SSL_PROTOCOL_TLSV1 ? "TLSv1, " : ""),
+#ifdef HAVE_TLSV1_X
+ (protocol & SSL_PROTOCOL_TLSV1_1 ? "TLSv1.1, " : ""),
+ (protocol & SSL_PROTOCOL_TLSV1_2 ? "TLSv1.2, " : ""),
+#if SSL_HAVE_PROTOCOL_TLSV1_3
+ (protocol & SSL_PROTOCOL_TLSV1_3 ? "TLSv1.3, " : ""),
+#endif
+#endif
+ NULL);
+ cp[strlen(cp)-2] = NUL;
+
+ ap_log_error(APLOG_MARK, APLOG_TRACE3, 0, s,
+ "Creating new SSL context (protocols: %s)", cp);
+
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+#ifndef OPENSSL_NO_SSL3
+ if (protocol == SSL_PROTOCOL_SSLV3) {
+ method = mctx->pkp ?
+ SSLv3_client_method() : /* proxy */
+ SSLv3_server_method(); /* server */
+ }
+ else
+#endif
+ if (protocol == SSL_PROTOCOL_TLSV1) {
+ method = mctx->pkp ?
+ TLSv1_client_method() : /* proxy */
+ TLSv1_server_method(); /* server */
+ }
+#ifdef HAVE_TLSV1_X
+ else if (protocol == SSL_PROTOCOL_TLSV1_1) {
+ method = mctx->pkp ?
+ TLSv1_1_client_method() : /* proxy */
+ TLSv1_1_server_method(); /* server */
+ }
+ else if (protocol == SSL_PROTOCOL_TLSV1_2) {
+ method = mctx->pkp ?
+ TLSv1_2_client_method() : /* proxy */
+ TLSv1_2_server_method(); /* server */
+ }
+#if SSL_HAVE_PROTOCOL_TLSV1_3
+ else if (protocol == SSL_PROTOCOL_TLSV1_3) {
+ method = mctx->pkp ?
+ TLSv1_3_client_method() : /* proxy */
+ TLSv1_3_server_method(); /* server */
+ }
+#endif
+#endif
+ else { /* For multiple protocols, we need a flexible method */
+ method = mctx->pkp ?
+ SSLv23_client_method() : /* proxy */
+ SSLv23_server_method(); /* server */
+ }
+#else
+ method = mctx->pkp ?
+ TLS_client_method() : /* proxy */
+ TLS_server_method(); /* server */
+#endif
+ ctx = SSL_CTX_new(method);
+
+ mctx->ssl_ctx = ctx;
+
+ SSL_CTX_set_options(ctx, SSL_OP_ALL);
+
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || \
+ (defined(LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER < 0x20800000L)
+ /* always disable SSLv2, as per RFC 6176 */
+ SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2);
+
+#ifndef OPENSSL_NO_SSL3
+ if (!(protocol & SSL_PROTOCOL_SSLV3)) {
+ SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3);
+ }
+#endif
+
+ if (!(protocol & SSL_PROTOCOL_TLSV1)) {
+ SSL_CTX_set_options(ctx, SSL_OP_NO_TLSv1);
+ }
+
+#ifdef HAVE_TLSV1_X
+ if (!(protocol & SSL_PROTOCOL_TLSV1_1)) {
+ SSL_CTX_set_options(ctx, SSL_OP_NO_TLSv1_1);
+ }
+
+ if (!(protocol & SSL_PROTOCOL_TLSV1_2)) {
+ SSL_CTX_set_options(ctx, SSL_OP_NO_TLSv1_2);
+ }
+#if SSL_HAVE_PROTOCOL_TLSV1_3
+ ssl_set_ctx_protocol_option(s, ctx, SSL_OP_NO_TLSv1_3,
+ protocol & SSL_PROTOCOL_TLSV1_3, "TLSv1.3");
+#endif
+#endif
+
+#else /* #if OPENSSL_VERSION_NUMBER < 0x10100000L */
+ /* We first determine the maximum protocol version we should provide */
+#if SSL_HAVE_PROTOCOL_TLSV1_3
+ if (protocol & SSL_PROTOCOL_TLSV1_3) {
+ prot = TLS1_3_VERSION;
+ } else
+#endif
+ if (protocol & SSL_PROTOCOL_TLSV1_2) {
+ prot = TLS1_2_VERSION;
+ } else if (protocol & SSL_PROTOCOL_TLSV1_1) {
+ prot = TLS1_1_VERSION;
+ } else if (protocol & SSL_PROTOCOL_TLSV1) {
+ prot = TLS1_VERSION;
+#ifndef OPENSSL_NO_SSL3
+ } else if (protocol & SSL_PROTOCOL_SSLV3) {
+ prot = SSL3_VERSION;
+#endif
+ } else {
+ SSL_CTX_free(ctx);
+ mctx->ssl_ctx = NULL;
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(03378)
+ "No SSL protocols available [hint: SSLProtocol]");
+ return ssl_die(s);
+ }
+ SSL_CTX_set_max_proto_version(ctx, prot);
+
+ /* Next we scan for the minimal protocol version we should provide,
+ * but we do not allow holes between max and min */
+#if SSL_HAVE_PROTOCOL_TLSV1_3
+ if (prot == TLS1_3_VERSION && protocol & SSL_PROTOCOL_TLSV1_2) {
+ prot = TLS1_2_VERSION;
+ }
+#endif
+ if (prot == TLS1_2_VERSION && protocol & SSL_PROTOCOL_TLSV1_1) {
+ prot = TLS1_1_VERSION;
+ }
+ if (prot == TLS1_1_VERSION && protocol & SSL_PROTOCOL_TLSV1) {
+ prot = TLS1_VERSION;
+ }
+#ifndef OPENSSL_NO_SSL3
+ if (prot == TLS1_VERSION && protocol & SSL_PROTOCOL_SSLV3) {
+ prot = SSL3_VERSION;
+ }
+#endif
+ SSL_CTX_set_min_proto_version(ctx, prot);
+#endif /* if OPENSSL_VERSION_NUMBER < 0x10100000L */
+
+#ifdef SSL_OP_CIPHER_SERVER_PREFERENCE
+ if (sc->cipher_server_pref == TRUE) {
+ SSL_CTX_set_options(ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
+ }
+#endif
+
+
+#ifndef OPENSSL_NO_COMP
+ if (sc->compression != TRUE) {
+#ifdef SSL_OP_NO_COMPRESSION
+ /* OpenSSL >= 1.0 only */
+ SSL_CTX_set_options(ctx, SSL_OP_NO_COMPRESSION);
+#else
+ sk_SSL_COMP_zero(SSL_COMP_get_compression_methods());
+#endif
+ }
+#endif
+
+#ifdef SSL_OP_NO_TICKET
+ /*
+ * Configure using RFC 5077 TLS session tickets
+ * for session resumption.
+ */
+ if (sc->session_tickets == FALSE) {
+ SSL_CTX_set_options(ctx, SSL_OP_NO_TICKET);
+ }
+#endif
+
+#ifdef SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
+ if (sc->insecure_reneg == TRUE) {
+ SSL_CTX_set_options(ctx, SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION);
+ }
+#endif
+
+ SSL_CTX_set_app_data(ctx, s);
+
+ /*
+ * Configure additional context ingredients
+ */
+ SSL_CTX_set_options(ctx, SSL_OP_SINGLE_DH_USE);
+#ifdef HAVE_ECC
+ SSL_CTX_set_options(ctx, SSL_OP_SINGLE_ECDH_USE);
+#endif
+
+#ifdef SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
+ /*
+ * Disallow a session from being resumed during a renegotiation,
+ * so that an acceptable cipher suite can be negotiated.
+ */
+ SSL_CTX_set_options(ctx, SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION);
+#endif
+
+#ifdef SSL_MODE_RELEASE_BUFFERS
+ /* If httpd is configured to reduce mem usage, ask openssl to do so, too */
+ if (ap_max_mem_free != APR_ALLOCATOR_MAX_FREE_UNLIMITED)
+ SSL_CTX_set_mode(ctx, SSL_MODE_RELEASE_BUFFERS);
+#endif
+
+#if OPENSSL_VERSION_NUMBER >= 0x1010100fL
+ /* For OpenSSL >=1.1.1, disable auto-retry mode so it's possible
+ * to consume handshake records without blocking for app-data.
+ * https://github.com/openssl/openssl/issues/7178 */
+ SSL_CTX_clear_mode(ctx, SSL_MODE_AUTO_RETRY);
+#endif
+
+#ifdef HAVE_OPENSSL_KEYLOG
+ if (mctx->sc->mc->keylog_file) {
+ SSL_CTX_set_keylog_callback(ctx, modssl_callback_keylog);
+ }
+#endif
+
+ return APR_SUCCESS;
+}
+
+static void ssl_init_ctx_session_cache(server_rec *s,
+ apr_pool_t *p,
+ apr_pool_t *ptemp,
+ modssl_ctx_t *mctx)
+{
+ SSL_CTX *ctx = mctx->ssl_ctx;
+ SSLModConfigRec *mc = myModConfig(s);
+
+ SSL_CTX_set_session_cache_mode(ctx, mc->sesscache_mode);
+
+ if (mc->sesscache) {
+ SSL_CTX_sess_set_new_cb(ctx, ssl_callback_NewSessionCacheEntry);
+ SSL_CTX_sess_set_get_cb(ctx, ssl_callback_GetSessionCacheEntry);
+ SSL_CTX_sess_set_remove_cb(ctx, ssl_callback_DelSessionCacheEntry);
+ }
+}
+
+static void ssl_init_ctx_callbacks(server_rec *s,
+ apr_pool_t *p,
+ apr_pool_t *ptemp,
+ modssl_ctx_t *mctx)
+{
+ SSL_CTX *ctx = mctx->ssl_ctx;
+
+#if MODSSL_USE_OPENSSL_PRE_1_1_API
+ /* Note that for OpenSSL>=1.1, auto selection is enabled via
+ * SSL_CTX_set_dh_auto(,1) if no parameter is configured. */
+ SSL_CTX_set_tmp_dh_callback(ctx, ssl_callback_TmpDH);
+#endif
+
+ SSL_CTX_set_info_callback(ctx, ssl_callback_Info);
+
+#ifdef HAVE_TLS_ALPN
+ SSL_CTX_set_alpn_select_cb(ctx, ssl_callback_alpn_select, NULL);
+#endif
+}
+
+static APR_INLINE
+int modssl_CTX_load_verify_locations(SSL_CTX *ctx,
+ const char *file,
+ const char *path)
+{
+#if OPENSSL_VERSION_NUMBER < 0x30000000L
+ if (!SSL_CTX_load_verify_locations(ctx, file, path))
+ return 0;
+#else
+ if (file && !SSL_CTX_load_verify_file(ctx, file))
+ return 0;
+ if (path && !SSL_CTX_load_verify_dir(ctx, path))
+ return 0;
+#endif
+ return 1;
+}
+
+static apr_status_t ssl_init_ctx_verify(server_rec *s,
+ apr_pool_t *p,
+ apr_pool_t *ptemp,
+ modssl_ctx_t *mctx)
+{
+ SSL_CTX *ctx = mctx->ssl_ctx;
+
+ int verify = SSL_VERIFY_NONE;
+ STACK_OF(X509_NAME) *ca_list;
+
+ if (mctx->auth.verify_mode == SSL_CVERIFY_UNSET) {
+ mctx->auth.verify_mode = SSL_CVERIFY_NONE;
+ }
+
+ if (mctx->auth.verify_depth == UNSET) {
+ mctx->auth.verify_depth = 1;
+ }
+
+ /*
+ * Configure callbacks for SSL context
+ */
+ if (mctx->auth.verify_mode == SSL_CVERIFY_REQUIRE) {
+ verify |= SSL_VERIFY_PEER_STRICT;
+ }
+
+ if ((mctx->auth.verify_mode == SSL_CVERIFY_OPTIONAL) ||
+ (mctx->auth.verify_mode == SSL_CVERIFY_OPTIONAL_NO_CA))
+ {
+ verify |= SSL_VERIFY_PEER;
+ }
+
+ SSL_CTX_set_verify(ctx, verify, ssl_callback_SSLVerify);
+
+ /*
+ * Configure Client Authentication details
+ */
+ if (mctx->auth.ca_cert_file || mctx->auth.ca_cert_path) {
+ ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, s,
+ "Configuring client authentication");
+
+ if (!modssl_CTX_load_verify_locations(ctx, mctx->auth.ca_cert_file,
+ mctx->auth.ca_cert_path)) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01895)
+ "Unable to configure verify locations "
+ "for client authentication");
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return ssl_die(s);
+ }
+
+ if (mctx->pks && (mctx->pks->ca_name_file || mctx->pks->ca_name_path)) {
+ ca_list = ssl_init_FindCAList(s, ptemp,
+ mctx->pks->ca_name_file,
+ mctx->pks->ca_name_path);
+ } else
+ ca_list = ssl_init_FindCAList(s, ptemp,
+ mctx->auth.ca_cert_file,
+ mctx->auth.ca_cert_path);
+ if (sk_X509_NAME_num(ca_list) <= 0) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01896)
+ "Unable to determine list of acceptable "
+ "CA certificates for client authentication");
+ return ssl_die(s);
+ }
+
+ SSL_CTX_set_client_CA_list(ctx, ca_list);
+ }
+
+ /*
+ * Give a warning when no CAs were configured but client authentication
+ * should take place. This cannot work.
+ */
+ if (mctx->auth.verify_mode == SSL_CVERIFY_REQUIRE) {
+ ca_list = SSL_CTX_get_client_CA_list(ctx);
+
+ if (sk_X509_NAME_num(ca_list) == 0) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(01897)
+ "Init: Oops, you want to request client "
+ "authentication, but no CAs are known for "
+ "verification!? [Hint: SSLCACertificate*]");
+ }
+ }
+
+ return APR_SUCCESS;
+}
+
+static apr_status_t ssl_init_ctx_cipher_suite(server_rec *s,
+ apr_pool_t *p,
+ apr_pool_t *ptemp,
+ modssl_ctx_t *mctx)
+{
+ SSL_CTX *ctx = mctx->ssl_ctx;
+ const char *suite;
+
+ /*
+ * Configure SSL Cipher Suite. Always disable NULL and export ciphers,
+ * see also ssl_engine_config.c:ssl_cmd_SSLCipherSuite().
+ * OpenSSL's SSL_DEFAULT_CIPHER_LIST includes !aNULL:!eNULL from 0.9.8f,
+ * and !EXP from 0.9.8zf/1.0.1m/1.0.2a, so append them while we support
+ * earlier versions.
+ */
+ suite = mctx->auth.cipher_suite ? mctx->auth.cipher_suite :
+ apr_pstrcat(ptemp, SSL_DEFAULT_CIPHER_LIST, ":!aNULL:!eNULL:!EXP",
+ NULL);
+
+ ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, s,
+ "Configuring permitted SSL ciphers [%s]",
+ suite);
+
+ if (!SSL_CTX_set_cipher_list(ctx, suite)) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01898)
+ "Unable to configure permitted SSL ciphers");
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return ssl_die(s);
+ }
+#if SSL_HAVE_PROTOCOL_TLSV1_3
+ if (mctx->auth.tls13_ciphers
+ && !SSL_CTX_set_ciphersuites(ctx, mctx->auth.tls13_ciphers)) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(10127)
+ "Unable to configure permitted TLSv1.3 ciphers");
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return ssl_die(s);
+ }
+#endif
+ return APR_SUCCESS;
+}
+
+static APR_INLINE
+int modssl_X509_STORE_load_locations(X509_STORE *store,
+ const char *file,
+ const char *path)
+{
+#if OPENSSL_VERSION_NUMBER < 0x30000000L
+ if (!X509_STORE_load_locations(store, file, path))
+ return 0;
+#else
+ if (file && !X509_STORE_load_file(store, file))
+ return 0;
+ if (path && !X509_STORE_load_path(store, path))
+ return 0;
+#endif
+ return 1;
+}
+
+static apr_status_t ssl_init_ctx_crl(server_rec *s,
+ apr_pool_t *p,
+ apr_pool_t *ptemp,
+ modssl_ctx_t *mctx)
+{
+ X509_STORE *store = SSL_CTX_get_cert_store(mctx->ssl_ctx);
+ unsigned long crlflags = 0;
+ char *cfgp = mctx->pkp ? "SSLProxy" : "SSL";
+ int crl_check_mode;
+
+ if (mctx->ocsp_mask == UNSET) {
+ mctx->ocsp_mask = SSL_OCSPCHECK_NONE;
+ }
+
+ if (mctx->crl_check_mask == UNSET) {
+ mctx->crl_check_mask = SSL_CRLCHECK_NONE;
+ }
+ crl_check_mode = mctx->crl_check_mask & ~SSL_CRLCHECK_FLAGS;
+
+ /*
+ * Configure Certificate Revocation List (CRL) Details
+ */
+
+ if (!(mctx->crl_file || mctx->crl_path)) {
+ if (crl_check_mode == SSL_CRLCHECK_LEAF ||
+ crl_check_mode == SSL_CRLCHECK_CHAIN) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01899)
+ "Host %s: CRL checking has been enabled, but "
+ "neither %sCARevocationFile nor %sCARevocationPath "
+ "is configured", mctx->sc->vhost_id, cfgp, cfgp);
+ return ssl_die(s);
+ }
+ return APR_SUCCESS;
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(01900)
+ "Configuring certificate revocation facility");
+
+ if (!store || !modssl_X509_STORE_load_locations(store, mctx->crl_file,
+ mctx->crl_path)) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01901)
+ "Host %s: unable to configure X.509 CRL storage "
+ "for certificate revocation", mctx->sc->vhost_id);
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return ssl_die(s);
+ }
+
+ switch (crl_check_mode) {
+ case SSL_CRLCHECK_LEAF:
+ crlflags = X509_V_FLAG_CRL_CHECK;
+ break;
+ case SSL_CRLCHECK_CHAIN:
+ crlflags = X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL;
+ break;
+ default:
+ crlflags = 0;
+ }
+
+ if (crlflags) {
+ X509_STORE_set_flags(store, crlflags);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(01902)
+ "Host %s: X.509 CRL storage locations configured, "
+ "but CRL checking (%sCARevocationCheck) is not "
+ "enabled", mctx->sc->vhost_id, cfgp);
+ }
+
+ return APR_SUCCESS;
+}
+
+/*
+ * Read a file that optionally contains the server certificate in PEM
+ * format, possibly followed by a sequence of CA certificates that
+ * should be sent to the peer in the SSL Certificate message.
+ */
+static int use_certificate_chain(
+ SSL_CTX *ctx, char *file, int skipfirst, pem_password_cb *cb)
+{
+ BIO *bio;
+ X509 *x509;
+ unsigned long err;
+ int n;
+
+ if ((bio = BIO_new(BIO_s_file())) == NULL)
+ return -1;
+ if (BIO_read_filename(bio, file) <= 0) {
+ BIO_free(bio);
+ return -1;
+ }
+ /* optionally skip a leading server certificate */
+ if (skipfirst) {
+ if ((x509 = PEM_read_bio_X509(bio, NULL, cb, NULL)) == NULL) {
+ BIO_free(bio);
+ return -1;
+ }
+ X509_free(x509);
+ }
+ /* free a perhaps already configured extra chain */
+#ifdef OPENSSL_NO_SSL_INTERN
+ SSL_CTX_clear_extra_chain_certs(ctx);
+#else
+ if (ctx->extra_certs != NULL) {
+ sk_X509_pop_free((STACK_OF(X509) *)ctx->extra_certs, X509_free);
+ ctx->extra_certs = NULL;
+ }
+#endif
+
+ /* create new extra chain by loading the certs */
+ n = 0;
+ ERR_clear_error();
+ while ((x509 = PEM_read_bio_X509(bio, NULL, cb, NULL)) != NULL) {
+ if (!SSL_CTX_add_extra_chain_cert(ctx, x509)) {
+ X509_free(x509);
+ BIO_free(bio);
+ return -1;
+ }
+ n++;
+ }
+ /* Make sure that only the error is just an EOF */
+ if ((err = ERR_peek_error()) > 0) {
+ if (!( ERR_GET_LIB(err) == ERR_LIB_PEM
+ && ERR_GET_REASON(err) == PEM_R_NO_START_LINE)) {
+ BIO_free(bio);
+ return -1;
+ }
+ while (ERR_get_error() > 0) ;
+ }
+ BIO_free(bio);
+ return n;
+}
+
+static apr_status_t ssl_init_ctx_cert_chain(server_rec *s,
+ apr_pool_t *p,
+ apr_pool_t *ptemp,
+ modssl_ctx_t *mctx)
+{
+ BOOL skip_first = FALSE;
+ int i, n;
+ const char *chain = mctx->cert_chain;
+
+ /*
+ * Optionally configure extra server certificate chain certificates.
+ * This is usually done by OpenSSL automatically when one of the
+ * server cert issuers are found under SSLCACertificatePath or in
+ * SSLCACertificateFile. But because these are intended for client
+ * authentication it can conflict. For instance when you use a
+ * Global ID server certificate you've to send out the intermediate
+ * CA certificate, too. When you would just configure this with
+ * SSLCACertificateFile and also use client authentication mod_ssl
+ * would accept all clients also issued by this CA. Obviously this
+ * isn't what we want in this situation. So this feature here exists
+ * to allow one to explicitly configure CA certificates which are
+ * used only for the server certificate chain.
+ */
+ if (!chain) {
+ return APR_SUCCESS;
+ }
+
+ for (i = 0; (i < mctx->pks->cert_files->nelts) &&
+ APR_ARRAY_IDX(mctx->pks->cert_files, i, const char *); i++) {
+ if (strEQ(APR_ARRAY_IDX(mctx->pks->cert_files, i, const char *), chain)) {
+ skip_first = TRUE;
+ break;
+ }
+ }
+
+ n = use_certificate_chain(mctx->ssl_ctx, (char *)chain, skip_first, NULL);
+ if (n < 0) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01903)
+ "Failed to configure CA certificate chain!");
+ return ssl_die(s);
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(01904)
+ "Configuring server certificate chain "
+ "(%d CA certificate%s)",
+ n, n == 1 ? "" : "s");
+
+ return APR_SUCCESS;
+}
+
+static apr_status_t ssl_init_ctx(server_rec *s,
+ apr_pool_t *p,
+ apr_pool_t *ptemp,
+ modssl_ctx_t *mctx)
+{
+ apr_status_t rv;
+
+ if ((rv = ssl_init_ctx_protocol(s, p, ptemp, mctx)) != APR_SUCCESS) {
+ return rv;
+ }
+
+ ssl_init_ctx_session_cache(s, p, ptemp, mctx);
+
+ ssl_init_ctx_callbacks(s, p, ptemp, mctx);
+
+ if ((rv = ssl_init_ctx_verify(s, p, ptemp, mctx)) != APR_SUCCESS) {
+ return rv;
+ }
+
+ if ((rv = ssl_init_ctx_cipher_suite(s, p, ptemp, mctx)) != APR_SUCCESS) {
+ return rv;
+ }
+
+ if ((rv = ssl_init_ctx_crl(s, p, ptemp, mctx)) != APR_SUCCESS) {
+ return rv;
+ }
+
+ if (mctx->pks) {
+ /* XXX: proxy support? */
+ if ((rv = ssl_init_ctx_cert_chain(s, p, ptemp, mctx)) != APR_SUCCESS) {
+ return rv;
+ }
+#ifdef HAVE_TLSEXT
+ if ((rv = ssl_init_ctx_tls_extensions(s, p, ptemp, mctx)) !=
+ APR_SUCCESS) {
+ return rv;
+ }
+#endif
+ }
+
+ return APR_SUCCESS;
+}
+
+static void ssl_check_public_cert(server_rec *s,
+ apr_pool_t *ptemp,
+ X509 *cert,
+ const char *key_id)
+{
+ int is_ca, pathlen;
+
+ if (!cert) {
+ return;
+ }
+
+ /*
+ * Some information about the certificate(s)
+ */
+
+ if (modssl_X509_getBC(cert, &is_ca, &pathlen)) {
+ if (is_ca) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(01906)
+ "%s server certificate is a CA certificate "
+ "(BasicConstraints: CA == TRUE !?)", key_id);
+ }
+
+ if (pathlen > 0) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(01907)
+ "%s server certificate is not a leaf certificate "
+ "(BasicConstraints: pathlen == %d > 0 !?)",
+ key_id, pathlen);
+ }
+ }
+
+ if (modssl_X509_match_name(ptemp, cert, (const char *)s->server_hostname,
+ TRUE, s) == FALSE) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(01909)
+ "%s server certificate does NOT include an ID "
+ "which matches the server name", key_id);
+ }
+}
+
+/* prevent OpenSSL from showing its "Enter PEM pass phrase:" prompt */
+static int ssl_no_passwd_prompt_cb(char *buf, int size, int rwflag,
+ void *userdata) {
+ return 0;
+}
+
+static APR_INLINE int modssl_DH_bits(DH *dh)
+{
+#if OPENSSL_VERSION_NUMBER < 0x30000000L
+ return DH_bits(dh);
+#else
+ return BN_num_bits(DH_get0_p(dh));
+#endif
+}
+
+/* SSL_CTX_use_PrivateKey_file() can fail either because the private
+ * key was encrypted, or due to a mismatch between an already-loaded
+ * cert and the key - a common misconfiguration - from calling
+ * X509_check_private_key(). This macro is passed the last error code
+ * off the OpenSSL stack and evaluates to true only for the first
+ * case. With OpenSSL < 3 the second case is identifiable by the
+ * function code, but function codes are not used from 3.0. */
+#if OPENSSL_VERSION_NUMBER < 0x30000000L
+#define CHECK_PRIVKEY_ERROR(ec) (ERR_GET_FUNC(ec) != X509_F_X509_CHECK_PRIVATE_KEY)
+#else
+#define CHECK_PRIVKEY_ERROR(ec) (ERR_GET_LIB(ec) != ERR_LIB_X509 \
+ || (ERR_GET_REASON(ec) != X509_R_KEY_TYPE_MISMATCH \
+ && ERR_GET_REASON(ec) != X509_R_KEY_VALUES_MISMATCH \
+ && ERR_GET_REASON(ec) != X509_R_UNKNOWN_KEY_TYPE))
+#endif
+
+static apr_status_t ssl_init_server_certs(server_rec *s,
+ apr_pool_t *p,
+ apr_pool_t *ptemp,
+ modssl_ctx_t *mctx,
+ apr_array_header_t *pphrases)
+{
+ SSLModConfigRec *mc = myModConfig(s);
+ const char *vhost_id = mctx->sc->vhost_id, *key_id, *certfile, *keyfile;
+ int i;
+ X509 *cert;
+ DH *dh;
+#ifdef HAVE_ECC
+ EC_GROUP *ecparams = NULL;
+ int nid;
+ EC_KEY *eckey = NULL;
+#endif
+#ifndef HAVE_SSL_CONF_CMD
+ SSL *ssl;
+#endif
+
+ /* no OpenSSL default prompts for any of the SSL_CTX_use_* calls, please */
+ SSL_CTX_set_default_passwd_cb(mctx->ssl_ctx, ssl_no_passwd_prompt_cb);
+
+ /* Iterate over the SSLCertificateFile array */
+ for (i = 0; (i < mctx->pks->cert_files->nelts) &&
+ (certfile = APR_ARRAY_IDX(mctx->pks->cert_files, i,
+ const char *));
+ i++) {
+ EVP_PKEY *pkey;
+ const char *engine_certfile = NULL;
+
+ key_id = apr_psprintf(ptemp, "%s:%d", vhost_id, i);
+
+ ERR_clear_error();
+
+ /* first the certificate (public key) */
+ if (modssl_is_engine_id(certfile)) {
+ engine_certfile = certfile;
+ }
+ else if (mctx->cert_chain) {
+ if ((SSL_CTX_use_certificate_file(mctx->ssl_ctx, certfile,
+ SSL_FILETYPE_PEM) < 1)) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02561)
+ "Failed to configure certificate %s, check %s",
+ key_id, certfile);
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return APR_EGENERAL;
+ }
+ } else {
+ if ((SSL_CTX_use_certificate_chain_file(mctx->ssl_ctx,
+ certfile) < 1)) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02562)
+ "Failed to configure certificate %s (with chain),"
+ " check %s", key_id, certfile);
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return APR_EGENERAL;
+ }
+ }
+
+ /* and second, the private key */
+ if (i < mctx->pks->key_files->nelts) {
+ keyfile = APR_ARRAY_IDX(mctx->pks->key_files, i, const char *);
+ } else {
+ keyfile = certfile;
+ }
+
+ ERR_clear_error();
+
+ if (modssl_is_engine_id(keyfile)) {
+ apr_status_t rv;
+
+ cert = NULL;
+
+ if ((rv = modssl_load_engine_keypair(s, ptemp, vhost_id,
+ engine_certfile, keyfile,
+ &cert, &pkey))) {
+ return rv;
+ }
+
+ if (cert) {
+ if (SSL_CTX_use_certificate(mctx->ssl_ctx, cert) < 1) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(10137)
+ "Failed to configure engine certificate %s, check %s",
+ key_id, certfile);
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return APR_EGENERAL;
+ }
+
+ /* SSL_CTX now owns the cert. */
+ X509_free(cert);
+ }
+
+ if (SSL_CTX_use_PrivateKey(mctx->ssl_ctx, pkey) < 1) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(10130)
+ "Failed to configure private key %s from engine",
+ keyfile);
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return APR_EGENERAL;
+ }
+
+ /* SSL_CTX now owns the key */
+ EVP_PKEY_free(pkey);
+ }
+ else if ((SSL_CTX_use_PrivateKey_file(mctx->ssl_ctx, keyfile,
+ SSL_FILETYPE_PEM) < 1)
+ && CHECK_PRIVKEY_ERROR(ERR_peek_last_error())) {
+ ssl_asn1_t *asn1;
+ const unsigned char *ptr;
+
+ ERR_clear_error();
+
+ /* perhaps it's an encrypted private key, so try again */
+ ssl_load_encrypted_pkey(s, ptemp, i, keyfile, &pphrases);
+
+ if (!(asn1 = ssl_asn1_table_get(mc->tPrivateKey, key_id)) ||
+ !(ptr = asn1->cpData) ||
+ !(pkey = d2i_AutoPrivateKey(NULL, &ptr, asn1->nData)) ||
+ (SSL_CTX_use_PrivateKey(mctx->ssl_ctx, pkey) < 1)) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02564)
+ "Failed to configure encrypted (?) private key %s,"
+ " check %s", key_id, keyfile);
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return APR_EGENERAL;
+ }
+ }
+
+ if (SSL_CTX_check_private_key(mctx->ssl_ctx) < 1) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02565)
+ "Certificate and private key %s from %s and %s "
+ "do not match", key_id, certfile, keyfile);
+ return APR_EGENERAL;
+ }
+
+#ifdef HAVE_SSL_CONF_CMD
+ /*
+ * workaround for those OpenSSL versions where SSL_CTX_get0_certificate
+ * is not yet available: create an SSL struct which we dispose of
+ * as soon as we no longer need access to the cert. (Strictly speaking,
+ * SSL_CTX_get0_certificate does not depend on the SSL_CONF stuff,
+ * but there's no reliable way to check for its existence, so we
+ * assume that if SSL_CONF is available, it's OpenSSL 1.0.2 or later,
+ * and SSL_CTX_get0_certificate is implemented.)
+ */
+ if (!(cert = SSL_CTX_get0_certificate(mctx->ssl_ctx))) {
+#else
+ ssl = SSL_new(mctx->ssl_ctx);
+ if (ssl) {
+ /* Workaround bug in SSL_get_certificate in OpenSSL 0.9.8y */
+ SSL_set_connect_state(ssl);
+ cert = SSL_get_certificate(ssl);
+ }
+ if (!ssl || !cert) {
+#endif
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(02566)
+ "Unable to retrieve certificate %s", key_id);
+#ifndef HAVE_SSL_CONF_CMD
+ if (ssl)
+ SSL_free(ssl);
+#endif
+ return APR_EGENERAL;
+ }
+
+ /* warn about potential cert issues */
+ ssl_check_public_cert(s, ptemp, cert, key_id);
+
+#if defined(HAVE_OCSP_STAPLING) && !defined(SSL_CTRL_SET_CURRENT_CERT)
+ /*
+ * OpenSSL up to 1.0.1: configure stapling as we go. In 1.0.2
+ * and later, there's SSL_CTX_set_current_cert, which allows
+ * iterating over all certs in an SSL_CTX (including those possibly
+ * loaded via SSLOpenSSLConfCmd Certificate), so for 1.0.2 and
+ * later, we defer to the code in ssl_init_server_ctx.
+ */
+ if (!ssl_stapling_init_cert(s, p, ptemp, mctx, cert)) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(02567)
+ "Unable to configure certificate %s for stapling",
+ key_id);
+ }
+#endif
+
+#ifndef HAVE_SSL_CONF_CMD
+ SSL_free(ssl);
+#endif
+
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, APLOGNO(02568)
+ "Certificate and private key %s configured from %s and %s",
+ key_id, certfile, keyfile);
+ }
+
+ /*
+ * Try to read DH parameters from the (first) SSLCertificateFile
+ */
+ certfile = APR_ARRAY_IDX(mctx->pks->cert_files, 0, const char *);
+ if (certfile && !modssl_is_engine_id(certfile)
+ && (dh = ssl_dh_GetParamFromFile(certfile))) {
+ /* ### This should be replaced with SSL_CTX_set0_tmp_dh_pkey()
+ * for OpenSSL 3.0+. */
+ SSL_CTX_set_tmp_dh(mctx->ssl_ctx, dh);
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02540)
+ "Custom DH parameters (%d bits) for %s loaded from %s",
+ modssl_DH_bits(dh), vhost_id, certfile);
+ DH_free(dh);
+ }
+#if !MODSSL_USE_OPENSSL_PRE_1_1_API
+ else {
+ /* If no parameter is manually configured, enable auto
+ * selection. */
+ SSL_CTX_set_dh_auto(mctx->ssl_ctx, 1);
+ }
+#endif
+
+#ifdef HAVE_ECC
+ /*
+ * Similarly, try to read the ECDH curve name from SSLCertificateFile...
+ */
+ if (certfile && !modssl_is_engine_id(certfile)
+ && (ecparams = ssl_ec_GetParamFromFile(certfile))
+ && (nid = EC_GROUP_get_curve_name(ecparams))
+ && (eckey = EC_KEY_new_by_curve_name(nid))) {
+ SSL_CTX_set_tmp_ecdh(mctx->ssl_ctx, eckey);
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02541)
+ "ECDH curve %s for %s specified in %s",
+ OBJ_nid2sn(nid), vhost_id, certfile);
+ }
+ /*
+ * ...otherwise, enable auto curve selection (OpenSSL 1.0.2)
+ * or configure NIST P-256 (required to enable ECDHE for earlier versions)
+ * ECDH is always enabled in 1.1.0 unless excluded from SSLCipherList
+ */
+#if MODSSL_USE_OPENSSL_PRE_1_1_API
+ else {
+#if defined(SSL_CTX_set_ecdh_auto)
+ SSL_CTX_set_ecdh_auto(mctx->ssl_ctx, 1);
+#else
+ eckey = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
+ SSL_CTX_set_tmp_ecdh(mctx->ssl_ctx, eckey);
+#endif
+ }
+#endif
+ /* OpenSSL assures us that _free() is NULL-safe */
+ EC_KEY_free(eckey);
+ EC_GROUP_free(ecparams);
+#endif
+
+ return APR_SUCCESS;
+}
+
+#ifdef HAVE_TLS_SESSION_TICKETS
+static apr_status_t ssl_init_ticket_key(server_rec *s,
+ apr_pool_t *p,
+ apr_pool_t *ptemp,
+ modssl_ctx_t *mctx)
+{
+ apr_status_t rv;
+ apr_file_t *fp;
+ apr_size_t len;
+ char buf[TLSEXT_TICKET_KEY_LEN];
+ char *path;
+ modssl_ticket_key_t *ticket_key = mctx->ticket_key;
+ int res;
+
+ if (!ticket_key->file_path) {
+ return APR_SUCCESS;
+ }
+
+ path = ap_server_root_relative(p, ticket_key->file_path);
+
+ rv = apr_file_open(&fp, path, APR_READ|APR_BINARY,
+ APR_OS_DEFAULT, ptemp);
+
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02286)
+ "Failed to open ticket key file %s: (%d) %pm",
+ path, rv, &rv);
+ return ssl_die(s);
+ }
+
+ rv = apr_file_read_full(fp, &buf[0], TLSEXT_TICKET_KEY_LEN, &len);
+
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02287)
+ "Failed to read %d bytes from %s: (%d) %pm",
+ TLSEXT_TICKET_KEY_LEN, path, rv, &rv);
+ return ssl_die(s);
+ }
+
+ memcpy(ticket_key->key_name, buf, 16);
+ memcpy(ticket_key->aes_key, buf + 32, 16);
+#if OPENSSL_VERSION_NUMBER < 0x30000000L
+ memcpy(ticket_key->hmac_secret, buf + 16, 16);
+ res = SSL_CTX_set_tlsext_ticket_key_cb(mctx->ssl_ctx,
+ ssl_callback_SessionTicket);
+#else
+ ticket_key->mac_params[0] =
+ OSSL_PARAM_construct_octet_string(OSSL_MAC_PARAM_KEY, buf + 16, 16);
+ ticket_key->mac_params[1] =
+ OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST, "sha256", 0);
+ ticket_key->mac_params[2] =
+ OSSL_PARAM_construct_end();
+ res = SSL_CTX_set_tlsext_ticket_key_evp_cb(mctx->ssl_ctx,
+ ssl_callback_SessionTicket);
+#endif
+ if (!res) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01913)
+ "Unable to initialize TLS session ticket key callback "
+ "(incompatible OpenSSL version?)");
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return ssl_die(s);
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, APLOGNO(02288)
+ "TLS session ticket key for %s successfully loaded from %s",
+ (mySrvConfig(s))->vhost_id, path);
+
+ return APR_SUCCESS;
+}
+#endif
+
+static BOOL load_x509_info(apr_pool_t *ptemp,
+ STACK_OF(X509_INFO) *sk,
+ const char *filename)
+{
+ BIO *in;
+
+ if (!(in = BIO_new(BIO_s_file()))) {
+ return FALSE;
+ }
+
+ if (BIO_read_filename(in, filename) <= 0) {
+ BIO_free(in);
+ return FALSE;
+ }
+
+ ERR_clear_error();
+
+ PEM_X509_INFO_read_bio(in, sk, NULL, NULL);
+
+ BIO_free(in);
+
+ return TRUE;
+}
+
+static apr_status_t ssl_init_proxy_certs(server_rec *s,
+ apr_pool_t *p,
+ apr_pool_t *ptemp,
+ modssl_ctx_t *mctx)
+{
+ int n, ncerts = 0;
+ STACK_OF(X509_INFO) *sk;
+ modssl_pk_proxy_t *pkp = mctx->pkp;
+ STACK_OF(X509) *chain;
+ X509_STORE_CTX *sctx;
+ X509_STORE *store = SSL_CTX_get_cert_store(mctx->ssl_ctx);
+
+#if OPENSSL_VERSION_NUMBER >= 0x1010100fL
+ /* For OpenSSL >=1.1.1, turn on client cert support which is
+ * otherwise turned off by default (by design).
+ * https://github.com/openssl/openssl/issues/6933 */
+ SSL_CTX_set_post_handshake_auth(mctx->ssl_ctx, 1);
+#endif
+
+ SSL_CTX_set_client_cert_cb(mctx->ssl_ctx,
+ ssl_callback_proxy_cert);
+
+ if (!(pkp->cert_file || pkp->cert_path)) {
+ return APR_SUCCESS;
+ }
+
+ sk = sk_X509_INFO_new_null();
+
+ if (pkp->cert_file) {
+ load_x509_info(ptemp, sk, pkp->cert_file);
+ }
+
+ if (pkp->cert_path) {
+ ssl_init_ca_cert_path(s, ptemp, pkp->cert_path, NULL, sk);
+ }
+
+ if ((ncerts = sk_X509_INFO_num(sk)) <= 0) {
+ sk_X509_INFO_free(sk);
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(02206)
+ "no client certs found for SSL proxy");
+ return APR_SUCCESS;
+ }
+
+ /* Check that all client certs have got certificates and private
+ * keys. */
+ for (n = 0; n < ncerts; n++) {
+ X509_INFO *inf = sk_X509_INFO_value(sk, n);
+
+ if (!inf->x509 || !inf->x_pkey || !inf->x_pkey->dec_pkey ||
+ inf->enc_data) {
+ sk_X509_INFO_free(sk);
+ ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, s, APLOGNO(02252)
+ "incomplete client cert configured for SSL proxy "
+ "(missing or encrypted private key?)");
+ return ssl_die(s);
+ }
+
+ if (X509_check_private_key(inf->x509, inf->x_pkey->dec_pkey) != 1) {
+ ssl_log_xerror(SSLLOG_MARK, APLOG_STARTUP, 0, ptemp, s, inf->x509,
+ APLOGNO(02326) "proxy client certificate and "
+ "private key do not match");
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_ERR, s);
+ return ssl_die(s);
+ }
+ }
+
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02207)
+ "loaded %d client certs for SSL proxy",
+ ncerts);
+ pkp->certs = sk;
+
+
+ if (!pkp->ca_cert_file || !store) {
+ return APR_SUCCESS;
+ }
+
+ /* If SSLProxyMachineCertificateChainFile is configured, load all
+ * the CA certs and have OpenSSL attempt to construct a full chain
+ * from each configured end-entity cert up to a root. This will
+ * allow selection of the correct cert given a list of root CA
+ * names in the certificate request from the server. */
+ pkp->ca_certs = (STACK_OF(X509) **) apr_pcalloc(p, ncerts * sizeof(sk));
+ sctx = X509_STORE_CTX_new();
+
+ if (!sctx) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02208)
+ "SSL proxy client cert initialization failed");
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return ssl_die(s);
+ }
+
+ modssl_X509_STORE_load_locations(store, pkp->ca_cert_file, NULL);
+
+ for (n = 0; n < ncerts; n++) {
+ int i;
+
+ X509_INFO *inf = sk_X509_INFO_value(pkp->certs, n);
+ X509_STORE_CTX_init(sctx, store, inf->x509, NULL);
+
+ /* Attempt to verify the client cert */
+ if (X509_verify_cert(sctx) != 1) {
+ int err = X509_STORE_CTX_get_error(sctx);
+ ssl_log_xerror(SSLLOG_MARK, APLOG_WARNING, 0, ptemp, s, inf->x509,
+ APLOGNO(02270) "SSL proxy client cert chain "
+ "verification failed: %s :",
+ X509_verify_cert_error_string(err));
+ }
+
+ /* Clear X509_verify_cert errors */
+ ERR_clear_error();
+
+ /* Obtain a copy of the verified chain */
+ chain = X509_STORE_CTX_get1_chain(sctx);
+
+ if (chain != NULL) {
+ /* Discard end entity cert from the chain */
+ X509_free(sk_X509_shift(chain));
+
+ if ((i = sk_X509_num(chain)) > 0) {
+ /* Store the chain for later use */
+ pkp->ca_certs[n] = chain;
+ }
+ else {
+ /* Discard empty chain */
+ sk_X509_pop_free(chain, X509_free);
+ pkp->ca_certs[n] = NULL;
+ }
+
+ ssl_log_xerror(SSLLOG_MARK, APLOG_DEBUG, 0, ptemp, s, inf->x509,
+ APLOGNO(02271)
+ "loaded %i intermediate CA%s for cert %i: ",
+ i, i == 1 ? "" : "s", n);
+ if (i > 0) {
+ int j;
+ for (j = 0; j < i; j++) {
+ ssl_log_xerror(SSLLOG_MARK, APLOG_DEBUG, 0, ptemp, s,
+ sk_X509_value(chain, j), APLOGNO(03039)
+ "%i:", j);
+ }
+ }
+ }
+
+ /* get ready for next X509_STORE_CTX_init */
+ X509_STORE_CTX_cleanup(sctx);
+ }
+
+ X509_STORE_CTX_free(sctx);
+
+ return APR_SUCCESS;
+}
+
+#define MODSSL_CFG_ITEM_FREE(func, item) \
+ if (item) { \
+ func(item); \
+ item = NULL; \
+ }
+
+static void ssl_init_ctx_cleanup(modssl_ctx_t *mctx)
+{
+ MODSSL_CFG_ITEM_FREE(SSL_CTX_free, mctx->ssl_ctx);
+
+#ifdef HAVE_SRP
+ if (mctx->srp_vbase != NULL) {
+ SRP_VBASE_free(mctx->srp_vbase);
+ mctx->srp_vbase = NULL;
+ }
+#endif
+}
+
+static apr_status_t ssl_cleanup_proxy_ctx(void *data)
+{
+ modssl_ctx_t *mctx = data;
+
+ ssl_init_ctx_cleanup(mctx);
+
+ if (mctx->pkp->certs) {
+ int i = 0;
+ int ncerts = sk_X509_INFO_num(mctx->pkp->certs);
+
+ if (mctx->pkp->ca_certs) {
+ for (i = 0; i < ncerts; i++) {
+ if (mctx->pkp->ca_certs[i] != NULL) {
+ sk_X509_pop_free(mctx->pkp->ca_certs[i], X509_free);
+ }
+ }
+ }
+
+ sk_X509_INFO_pop_free(mctx->pkp->certs, X509_INFO_free);
+ mctx->pkp->certs = NULL;
+ }
+
+ return APR_SUCCESS;
+}
+
+static apr_status_t ssl_init_proxy_ctx(server_rec *s,
+ apr_pool_t *p,
+ apr_pool_t *ptemp,
+ modssl_ctx_t *proxy)
+{
+ apr_status_t rv;
+
+ if (proxy->ssl_ctx) {
+ /* Merged/initialized already */
+ return APR_SUCCESS;
+ }
+
+ apr_pool_cleanup_register(p, proxy,
+ ssl_cleanup_proxy_ctx,
+ apr_pool_cleanup_null);
+
+ if ((rv = ssl_init_ctx(s, p, ptemp, proxy)) != APR_SUCCESS) {
+ return rv;
+ }
+
+ if ((rv = ssl_init_proxy_certs(s, p, ptemp, proxy)) != APR_SUCCESS) {
+ return rv;
+ }
+
+ return APR_SUCCESS;
+}
+
+static apr_status_t ssl_init_server_ctx(server_rec *s,
+ apr_pool_t *p,
+ apr_pool_t *ptemp,
+ SSLSrvConfigRec *sc,
+ apr_array_header_t *pphrases)
+{
+ apr_status_t rv;
+ modssl_pk_server_t *pks;
+#ifdef HAVE_SSL_CONF_CMD
+ ssl_ctx_param_t *param = (ssl_ctx_param_t *)sc->server->ssl_ctx_param->elts;
+ SSL_CONF_CTX *cctx = sc->server->ssl_ctx_config;
+ int i;
+#endif
+ int n;
+
+ /*
+ * Check for problematic re-initializations
+ */
+ if (sc->server->ssl_ctx) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02569)
+ "Illegal attempt to re-initialise SSL for server "
+ "(SSLEngine On should go in the VirtualHost, not in global scope.)");
+ return APR_EGENERAL;
+ }
+
+ /* Allow others to provide certificate files */
+ pks = sc->server->pks;
+ n = pks->cert_files->nelts;
+ ap_ssl_add_cert_files(s, p, pks->cert_files, pks->key_files);
+ ssl_run_add_cert_files(s, p, pks->cert_files, pks->key_files);
+
+ if (apr_is_empty_array(pks->cert_files)) {
+ /* does someone propose a certiciate to fall back on here? */
+ ap_ssl_add_fallback_cert_files(s, p, pks->cert_files, pks->key_files);
+ ssl_run_add_fallback_cert_files(s, p, pks->cert_files, pks->key_files);
+ if (n < pks->cert_files->nelts) {
+ pks->service_unavailable = 1;
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s, APLOGNO(10085)
+ "Init: %s will respond with '503 Service Unavailable' for now. There "
+ "are no SSL certificates configured and no other module contributed any.",
+ ssl_util_vhostid(p, s));
+ }
+ }
+
+ if (n < pks->cert_files->nelts) {
+ /* additionally installed certs overrides any old chain configuration */
+ sc->server->cert_chain = NULL;
+ }
+
+ if ((rv = ssl_init_ctx(s, p, ptemp, sc->server)) != APR_SUCCESS) {
+ return rv;
+ }
+
+ if ((rv = ssl_init_server_certs(s, p, ptemp, sc->server, pphrases))
+ != APR_SUCCESS) {
+ return rv;
+ }
+
+#ifdef HAVE_SSL_CONF_CMD
+ SSL_CONF_CTX_set_ssl_ctx(cctx, sc->server->ssl_ctx);
+ for (i = 0; i < sc->server->ssl_ctx_param->nelts; i++, param++) {
+ ERR_clear_error();
+ if (SSL_CONF_cmd(cctx, param->name, param->value) <= 0) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02407)
+ "\"SSLOpenSSLConfCmd %s %s\" failed for %s",
+ param->name, param->value, sc->vhost_id);
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return ssl_die(s);
+ } else {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02556)
+ "\"SSLOpenSSLConfCmd %s %s\" applied to %s",
+ param->name, param->value, sc->vhost_id);
+ }
+ }
+
+ if (SSL_CONF_CTX_finish(cctx) == 0) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02547)
+ "SSL_CONF_CTX_finish() failed");
+ SSL_CONF_CTX_free(cctx);
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return ssl_die(s);
+ }
+#endif
+
+ if (SSL_CTX_check_private_key(sc->server->ssl_ctx) != 1) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02572)
+ "Failed to configure at least one certificate and key "
+ "for %s", sc->vhost_id);
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
+ return ssl_die(s);
+ }
+
+#if defined(HAVE_OCSP_STAPLING) && defined(SSL_CTRL_SET_CURRENT_CERT)
+ /*
+ * OpenSSL 1.0.2 and later allows iterating over all SSL_CTX certs
+ * by means of SSL_CTX_set_current_cert. Enabling stapling at this
+ * (late) point makes sure that we catch both certificates loaded
+ * via SSLCertificateFile and SSLOpenSSLConfCmd Certificate.
+ */
+ do {
+ X509 *cert;
+ int i = 0;
+ int ret = SSL_CTX_set_current_cert(sc->server->ssl_ctx,
+ SSL_CERT_SET_FIRST);
+ while (ret) {
+ cert = SSL_CTX_get0_certificate(sc->server->ssl_ctx);
+ if (!cert || !ssl_stapling_init_cert(s, p, ptemp, sc->server,
+ cert)) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(02604)
+ "Unable to configure certificate %s:%d "
+ "for stapling", sc->vhost_id, i);
+ }
+ ret = SSL_CTX_set_current_cert(sc->server->ssl_ctx,
+ SSL_CERT_SET_NEXT);
+ i++;
+ }
+ } while(0);
+#endif
+
+#ifdef HAVE_TLS_SESSION_TICKETS
+ if ((rv = ssl_init_ticket_key(s, p, ptemp, sc->server)) != APR_SUCCESS) {
+ return rv;
+ }
+#endif
+
+ SSL_CTX_set_timeout(sc->server->ssl_ctx,
+ sc->session_cache_timeout == UNSET ?
+ SSL_SESSION_CACHE_TIMEOUT : sc->session_cache_timeout);
+
+ return APR_SUCCESS;
+}
+
+/*
+ * Configure a particular server
+ */
+apr_status_t ssl_init_ConfigureServer(server_rec *s,
+ apr_pool_t *p,
+ apr_pool_t *ptemp,
+ SSLSrvConfigRec *sc,
+ apr_array_header_t *pphrases)
+{
+ SSLDirConfigRec *sdc = ap_get_module_config(s->lookup_defaults,
+ &ssl_module);
+ apr_status_t rv;
+
+ /* Initialize the server if SSL is enabled or optional.
+ */
+ if ((sc->enabled == SSL_ENABLED_TRUE) || (sc->enabled == SSL_ENABLED_OPTIONAL)) {
+ ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, APLOGNO(01914)
+ "Configuring server %s for SSL protocol", sc->vhost_id);
+ if ((rv = ssl_init_server_ctx(s, p, ptemp, sc, pphrases))
+ != APR_SUCCESS) {
+ return rv;
+ }
+
+ /* Initialize OCSP Responder certificate if OCSP enabled */
+ #ifndef OPENSSL_NO_OCSP
+ ssl_init_ocsp_certificates(s, sc->server);
+ #endif
+
+ }
+
+ sdc->proxy->sc = sc;
+ if (sdc->proxy_enabled == TRUE) {
+ rv = ssl_init_proxy_ctx(s, p, ptemp, sdc->proxy);
+ if (rv != APR_SUCCESS) {
+ return rv;
+ }
+ }
+ else {
+ sdc->proxy_enabled = FALSE;
+ }
+ sdc->proxy_post_config = 1;
+
+ return APR_SUCCESS;
+}
+
+apr_status_t ssl_init_CheckServers(server_rec *base_server, apr_pool_t *p)
+{
+ server_rec *s;
+ SSLSrvConfigRec *sc;
+#ifndef HAVE_TLSEXT
+ server_rec *ps;
+ apr_hash_t *table;
+ const char *key;
+ apr_ssize_t klen;
+
+ BOOL conflict = FALSE;
+#endif
+
+ /*
+ * Give out warnings when a server has HTTPS configured
+ * for the HTTP port or vice versa
+ */
+ for (s = base_server; s; s = s->next) {
+ sc = mySrvConfig(s);
+
+ if ((sc->enabled == SSL_ENABLED_TRUE) && (s->port == DEFAULT_HTTP_PORT)) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0,
+ base_server, APLOGNO(01915)
+ "Init: (%s) You configured HTTPS(%d) "
+ "on the standard HTTP(%d) port!",
+ ssl_util_vhostid(p, s),
+ DEFAULT_HTTPS_PORT, DEFAULT_HTTP_PORT);
+ }
+
+ if ((sc->enabled == SSL_ENABLED_FALSE) && (s->port == DEFAULT_HTTPS_PORT)) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0,
+ base_server, APLOGNO(01916)
+ "Init: (%s) You configured HTTP(%d) "
+ "on the standard HTTPS(%d) port!",
+ ssl_util_vhostid(p, s),
+ DEFAULT_HTTP_PORT, DEFAULT_HTTPS_PORT);
+ }
+ }
+
+#ifndef HAVE_TLSEXT
+ /*
+ * Give out warnings when more than one SSL-aware virtual server uses the
+ * same IP:port and an OpenSSL version without support for TLS extensions
+ * (SNI in particular) is used.
+ */
+ table = apr_hash_make(p);
+
+ for (s = base_server; s; s = s->next) {
+ char *addr;
+
+ sc = mySrvConfig(s);
+
+ if (!((sc->enabled == SSL_ENABLED_TRUE) && s->addrs)) {
+ continue;
+ }
+
+ apr_sockaddr_ip_get(&addr, s->addrs->host_addr);
+ key = apr_psprintf(p, "%s:%u", addr, s->addrs->host_port);
+ klen = strlen(key);
+
+ if ((ps = (server_rec *)apr_hash_get(table, key, klen))) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, base_server, APLOGNO(02662)
+ "Init: SSL server IP/port conflict: "
+ "%s (%s:%d) vs. %s (%s:%d)",
+ ssl_util_vhostid(p, s),
+ (s->defn_name ? s->defn_name : "unknown"),
+ s->defn_line_number,
+ ssl_util_vhostid(p, ps),
+ (ps->defn_name ? ps->defn_name : "unknown"),
+ ps->defn_line_number);
+ conflict = TRUE;
+ continue;
+ }
+
+ apr_hash_set(table, key, klen, s);
+ }
+
+ if (conflict) {
+ ap_log_error(APLOG_MARK, APLOG_WARNING, 0, base_server, APLOGNO(01917)
+ "Init: Name-based SSL virtual hosts require "
+ "an OpenSSL version with support for TLS extensions "
+ "(RFC 6066 - Server Name Indication / SNI), "
+ "but the currently used library version (%s) is "
+ "lacking this feature", MODSSL_LIBRARY_DYNTEXT);
+ }
+#endif
+
+ return APR_SUCCESS;
+}
+
+int ssl_proxy_section_post_config(apr_pool_t *p, apr_pool_t *plog,
+ apr_pool_t *ptemp, server_rec *s,
+ ap_conf_vector_t *section_config)
+{
+ SSLDirConfigRec *sdc = ap_get_module_config(s->lookup_defaults,
+ &ssl_module);
+ SSLDirConfigRec *pdc = ap_get_module_config(section_config,
+ &ssl_module);
+ if (pdc) {
+ pdc->proxy->sc = mySrvConfig(s);
+ ssl_config_proxy_merge(p, sdc, pdc);
+ if (pdc->proxy_enabled) {
+ apr_status_t rv;
+
+ rv = ssl_init_proxy_ctx(s, p, ptemp, pdc->proxy);
+ if (rv != APR_SUCCESS) {
+ return !OK;
+ }
+
+ rv = ssl_run_init_server(s, p, 1, pdc->proxy->ssl_ctx);
+ if (rv != APR_SUCCESS) {
+ return !OK;
+ }
+ }
+ pdc->proxy_post_config = 1;
+ }
+ return OK;
+}
+
+static int ssl_init_FindCAList_X509NameCmp(const X509_NAME * const *a,
+ const X509_NAME * const *b)
+{
+ return(X509_NAME_cmp(*a, *b));
+}
+
+static void ssl_init_PushCAList(STACK_OF(X509_NAME) *ca_list,
+ server_rec *s, apr_pool_t *ptemp,
+ const char *file)
+{
+ int n;
+ STACK_OF(X509_NAME) *sk;
+
+ sk = (STACK_OF(X509_NAME) *)
+ SSL_load_client_CA_file(file);
+
+ if (!sk) {
+ return;
+ }
+
+ for (n = 0; n < sk_X509_NAME_num(sk); n++) {
+ X509_NAME *name = sk_X509_NAME_value(sk, n);
+
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02209)
+ "CA certificate: %s",
+ modssl_X509_NAME_to_string(ptemp, name, 0));
+
+ /*
+ * note that SSL_load_client_CA_file() checks for duplicates,
+ * but since we call it multiple times when reading a directory
+ * we must also check for duplicates ourselves.
+ */
+
+ if (sk_X509_NAME_find(ca_list, name) < 0) {
+ /* this will be freed when ca_list is */
+ sk_X509_NAME_push(ca_list, name);
+ }
+ else {
+ /* need to free this ourselves, else it will leak */
+ X509_NAME_free(name);
+ }
+ }
+
+ sk_X509_NAME_free(sk);
+}
+
+static apr_status_t ssl_init_ca_cert_path(server_rec *s,
+ apr_pool_t *ptemp,
+ const char *path,
+ STACK_OF(X509_NAME) *ca_list,
+ STACK_OF(X509_INFO) *xi_list)
+{
+ apr_dir_t *dir;
+ apr_finfo_t direntry;
+ apr_int32_t finfo_flags = APR_FINFO_TYPE|APR_FINFO_NAME;
+
+ if (!path || (!ca_list && !xi_list) ||
+ (apr_dir_open(&dir, path, ptemp) != APR_SUCCESS)) {
+ return APR_EGENERAL;
+ }
+
+ while ((apr_dir_read(&direntry, finfo_flags, dir)) == APR_SUCCESS) {
+ const char *file;
+ if (direntry.filetype == APR_DIR) {
+ continue; /* don't try to load directories */
+ }
+ file = apr_pstrcat(ptemp, path, "/", direntry.name, NULL);
+ if (ca_list) {
+ ssl_init_PushCAList(ca_list, s, ptemp, file);
+ }
+ if (xi_list) {
+ load_x509_info(ptemp, xi_list, file);
+ }
+ }
+
+ apr_dir_close(dir);
+
+ return APR_SUCCESS;
+}
+
+STACK_OF(X509_NAME) *ssl_init_FindCAList(server_rec *s,
+ apr_pool_t *ptemp,
+ const char *ca_file,
+ const char *ca_path)
+{
+ STACK_OF(X509_NAME) *ca_list;
+
+ /*
+ * Start with a empty stack/list where new
+ * entries get added in sorted order.
+ */
+ ca_list = sk_X509_NAME_new(ssl_init_FindCAList_X509NameCmp);
+
+ /*
+ * Process CA certificate bundle file
+ */
+ if (ca_file) {
+ ssl_init_PushCAList(ca_list, s, ptemp, ca_file);
+ /*
+ * If ca_list is still empty after trying to load ca_file
+ * then the file failed to load, and users should hear about that.
+ */
+ if (sk_X509_NAME_num(ca_list) == 0) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(02210)
+ "Failed to load SSLCACertificateFile: %s", ca_file);
+ ssl_log_ssl_error(SSLLOG_MARK, APLOG_ERR, s);
+ }
+ }
+
+ /*
+ * Process CA certificate path files
+ */
+ if (ca_path &&
+ ssl_init_ca_cert_path(s, ptemp,
+ ca_path, ca_list, NULL) != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02211)
+ "Failed to open Certificate Path `%s'", ca_path);
+ sk_X509_NAME_pop_free(ca_list, X509_NAME_free);
+ return NULL;
+ }
+
+ /*
+ * Cleanup
+ */
+ (void) sk_X509_NAME_set_cmp_func(ca_list, NULL);
+
+ return ca_list;
+}
+
+void ssl_init_Child(apr_pool_t *p, server_rec *s)
+{
+ SSLModConfigRec *mc = myModConfig(s);
+ mc->pid = getpid(); /* only call getpid() once per-process */
+
+ /* XXX: there should be an ap_srand() function */
+ srand((unsigned int)time(NULL));
+
+ /* open the mutex lockfile */
+ ssl_mutex_reinit(s, p);
+#ifdef HAVE_OCSP_STAPLING
+ ssl_stapling_mutex_reinit(s, p);
+#endif
+}
+
+apr_status_t ssl_init_ModuleKill(void *data)
+{
+ SSLSrvConfigRec *sc;
+ server_rec *base_server = (server_rec *)data;
+ server_rec *s;
+
+ /*
+ * Drop the session cache and mutex
+ */
+ ssl_scache_kill(base_server);
+
+ /*
+ * Free the non-pool allocated structures
+ * in the per-server configurations
+ */
+ for (s = base_server; s; s = s->next) {
+ sc = mySrvConfig(s);
+
+ ssl_init_ctx_cleanup(sc->server);
+
+ /* Not Sure but possibly clear X509 trusted cert file */
+ #ifndef OPENSSL_NO_OCSP
+ sk_X509_pop_free(sc->server->ocsp_certs, X509_free);
+ #endif
+
+ }
+
+#if MODSSL_USE_OPENSSL_PRE_1_1_API
+ free_dh_params();
+#else
+ free_bio_methods();
+#endif
+
+ return APR_SUCCESS;
+}