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/* 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 "mpm_common.h"
/* _________________________________________________________________
**
** Module Initialization
** _________________________________________________________________
*/
#ifndef OPENSSL_NO_EC
#define KEYTYPES "RSA, DSA or ECC"
#else
#define KEYTYPES "RSA or DSA"
#endif
static void ssl_add_version_components(apr_pool_t *p,
server_rec *s)
{
char *modver = ssl_var_lookup(p, s, NULL, NULL, "SSL_VERSION_INTERFACE");
char *libver = ssl_var_lookup(p, s, NULL, NULL, "SSL_VERSION_LIBRARY");
char *incver = ssl_var_lookup(p, s, NULL, NULL,
"SSL_VERSION_LIBRARY_INTERFACE");
ap_add_version_component(p, libver);
ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, APLOGNO(01876)
"%s compiled against Server: %s, Library: %s",
modver, AP_SERVER_BASEVERSION, incver);
}
/*
* Handle the Temporary RSA Keys and DH Params
*/
#define MODSSL_TMP_KEY_FREE(mc, type, idx) \
if (mc->pTmpKeys[idx]) { \
type##_free((type *)mc->pTmpKeys[idx]); \
mc->pTmpKeys[idx] = NULL; \
}
#define MODSSL_TMP_KEYS_FREE(mc, type) \
MODSSL_TMP_KEY_FREE(mc, type, SSL_TMP_KEY_##type##_512); \
MODSSL_TMP_KEY_FREE(mc, type, SSL_TMP_KEY_##type##_1024)
static void ssl_tmp_keys_free(server_rec *s)
{
SSLModConfigRec *mc = myModConfig(s);
MODSSL_TMP_KEYS_FREE(mc, RSA);
MODSSL_TMP_KEYS_FREE(mc, DH);
#ifndef OPENSSL_NO_EC
MODSSL_TMP_KEY_FREE(mc, EC_KEY, SSL_TMP_KEY_EC_256);
#endif
}
static int ssl_tmp_key_init_rsa(server_rec *s,
int bits, int idx)
{
SSLModConfigRec *mc = myModConfig(s);
#ifdef HAVE_FIPS
if (FIPS_mode() && bits < 1024) {
mc->pTmpKeys[idx] = NULL;
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(01877)
"Init: Skipping generating temporary "
"%d bit RSA private key in FIPS mode", bits);
return OK;
}
#endif
#ifdef HAVE_GENERATE_EX
{
RSA *tkey;
BIGNUM *bn_f4;
if (!(tkey = RSA_new())
|| !(bn_f4 = BN_new())
|| !BN_set_word(bn_f4, RSA_F4)
|| !RSA_generate_key_ex(tkey, bits, bn_f4, NULL))
{
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(01878)
"Init: Failed to generate temporary "
"%d bit RSA private key", bits);
ssl_log_ssl_error(SSLLOG_MARK, APLOG_ERR, s);
return !OK;
}
BN_free(bn_f4);
mc->pTmpKeys[idx] = tkey;
}
#else
if (!(mc->pTmpKeys[idx] =
RSA_generate_key(bits, RSA_F4, NULL, NULL)))
{
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(01879)
"Init: Failed to generate temporary "
"%d bit RSA private key", bits);
ssl_log_ssl_error(SSLLOG_MARK, APLOG_ERR, s);
return !OK;
}
#endif
return OK;
}
static int ssl_tmp_key_init_dh(server_rec *s,
int bits, int idx)
{
SSLModConfigRec *mc = myModConfig(s);
#ifdef HAVE_FIPS
if (FIPS_mode() && bits < 1024) {
mc->pTmpKeys[idx] = NULL;
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(01880)
"Init: Skipping generating temporary "
"%d bit DH parameters in FIPS mode", bits);
return OK;
}
#endif
if (!(mc->pTmpKeys[idx] =
ssl_dh_GetTmpParam(bits)))
{
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(01881)
"Init: Failed to generate temporary "
"%d bit DH parameters", bits);
return !OK;
}
return OK;
}
#ifndef OPENSSL_NO_EC
static int ssl_tmp_key_init_ec(server_rec *s,
int bits, int idx)
{
SSLModConfigRec *mc = myModConfig(s);
EC_KEY *ecdh = NULL;
/* XXX: Are there any FIPS constraints we should enforce? */
if (bits != 256) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(02298)
"Init: Failed to generate temporary "
"%d bit EC parameters, only 256 bits supported", bits);
return !OK;
}
if ((ecdh = EC_KEY_new()) == NULL ||
EC_KEY_set_group(ecdh, EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1)) != 1)
{
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(02299)
"Init: Failed to generate temporary "
"%d bit EC parameters", bits);
return !OK;
}
mc->pTmpKeys[idx] = ecdh;
return OK;
}
#define MODSSL_TMP_KEY_INIT_EC(s, bits) \
ssl_tmp_key_init_ec(s, bits, SSL_TMP_KEY_EC_##bits)
#endif
#define MODSSL_TMP_KEY_INIT_RSA(s, bits) \
ssl_tmp_key_init_rsa(s, bits, SSL_TMP_KEY_RSA_##bits)
#define MODSSL_TMP_KEY_INIT_DH(s, bits) \
ssl_tmp_key_init_dh(s, bits, SSL_TMP_KEY_DH_##bits)
static int ssl_tmp_keys_init(server_rec *s)
{
ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, s,
"Init: Generating temporary RSA private keys (512/1024 bits)");
if (MODSSL_TMP_KEY_INIT_RSA(s, 512) ||
MODSSL_TMP_KEY_INIT_RSA(s, 1024)) {
return !OK;
}
ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, s,
"Init: Generating temporary DH parameters (512/1024 bits)");
if (MODSSL_TMP_KEY_INIT_DH(s, 512) ||
MODSSL_TMP_KEY_INIT_DH(s, 1024)) {
return !OK;
}
#ifndef OPENSSL_NO_EC
ap_log_error(APLOG_MARK, APLOG_TRACE1, 0, s,
"Init: Generating temporary EC parameters (256 bits)");
if (MODSSL_TMP_KEY_INIT_EC(s, 256)) {
return !OK;
}
#endif
return OK;
}
/*
* Per-module initialization
*/
int 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;
if (SSLeay() < SSL_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",
SSL_LIBRARY_TEXT, SSLeay_version(SSLEAY_VERSION));
}
/* 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;
}
if (sc->proxy) {
sc->proxy->sc = sc;
}
/*
* Create the server host:port string because we need it a lot
*/
sc->vhost_id = ssl_util_vhostid(p, s);
sc->vhost_id_len = strlen(sc->vhost_id);
if (ap_get_server_protocol(s) &&
strcmp("https", ap_get_server_protocol(s)) == 0) {
sc->enabled = SSL_ENABLED_TRUE;
}
/* If sc->enabled is UNSET, then SSL is optional on this vhost */
/* Fix up stuff that may not have been set */
if (sc->enabled == SSL_ENABLED_UNSET) {
sc->enabled = SSL_ENABLED_FALSE;
}
if (sc->proxy_enabled == UNSET) {
sc->proxy_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;
}
#ifdef HAVE_FIPS
if (sc->fips == UNSET) {
sc->fips = FALSE;
}
#endif
}
#if APR_HAS_THREADS
ssl_util_thread_setup(p);
#endif
/*
* SSL external crypto device ("engine") support
*/
#if defined(HAVE_OPENSSL_ENGINE_H) && defined(HAVE_ENGINE_INIT)
ssl_init_Engine(base_server, p);
#endif
ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, APLOGNO(01883)
"Init: Initialized %s library", SSL_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(sc->fips) {
if (!FIPS_mode()) {
if (FIPS_mode_set(1)) {
ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, s, APLOGNO(01884)
"Operating in SSL FIPS mode");
}
else {
ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01885) "FIPS mode failed");
ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
ssl_die(s);
}
}
}
else {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(01886)
"SSL FIPS mode disabled");
}
#endif
/*
* read server private keys/public certs into memory.
* decrypting any encrypted keys via configured SSLPassPhraseDialogs
* anything that needs to live longer than ptemp needs to also survive
* restarts, in which case they'll live inside s->process->pool.
*/
ssl_pphrase_Handle(base_server, ptemp);
if (ssl_tmp_keys_init(base_server)) {
return !OK;
}
/*
* initialize the mutex handling
*/
if (!ssl_mutex_init(base_server, p)) {
return HTTP_INTERNAL_SERVER_ERROR;
}
#ifdef HAVE_OCSP_STAPLING
ssl_stapling_ex_init();
#endif
/*
* initialize session caching
*/
ssl_scache_init(base_server, p);
/*
* 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
*/
ssl_init_ConfigureServer(s, p, ptemp, sc);
}
/*
* Configuration consistency checks
*/
ssl_init_CheckServers(base_server, ptemp);
/*
* Announce mod_ssl and SSL library in HTTP Server field
* as ``mod_ssl/X.X.X OpenSSL/X.X.X''
*/
ssl_add_version_components(p, base_server);
SSL_init_app_data2_idx(); /* for SSL_get_app_data2() at request time */
return OK;
}
/*
* Support for external a Crypto Device ("engine"), usually
* a hardware accellerator card for crypto operations.
*/
#if defined(HAVE_OPENSSL_ENGINE_H) && defined(HAVE_ENGINE_INIT)
void 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);
ssl_die(s);
}
if (strEQ(mc->szCryptoDevice, "chil")) {
ENGINE_ctrl(e, ENGINE_CTRL_CHIL_SET_FORKCHECK, 1, 0, 0);
}
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);
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);
}
}
#endif
static void ssl_init_server_check(server_rec *s,
apr_pool_t *p,
apr_pool_t *ptemp,
modssl_ctx_t *mctx)
{
/*
* check for important parameters and the
* possibility that the user forgot to set them.
*/
if (!mctx->pks->cert_files[0] && !mctx->pkcs7) {
ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01891)
"No SSL Certificate set [hint: SSLCertificateFile]");
ssl_die(s);
}
/*
* Check for problematic re-initializations
*/
if (mctx->pks->certs[SSL_AIDX_RSA] ||
mctx->pks->certs[SSL_AIDX_DSA]
#ifndef OPENSSL_NO_EC
|| mctx->pks->certs[SSL_AIDX_ECC]
#endif
)
{
ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01892)
"Illegal attempt to re-initialise SSL for server "
"(SSLEngine On should go in the VirtualHost, not in global scope.)");
ssl_die(s);
}
}
#ifndef OPENSSL_NO_TLSEXT
static void ssl_init_ctx_tls_extensions(server_rec *s,
apr_pool_t *p,
apr_pool_t *ptemp,
modssl_ctx_t *mctx)
{
/*
* Configure TLS extensions support
*/
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(01893)
"Configuring TLS extension handling");
/*
* Server name indication (SNI)
*/
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);
ssl_die(s);
}
#ifdef HAVE_OCSP_STAPLING
/*
* OCSP Stapling support, status_request extension
*/
if ((mctx->pkp == FALSE) && (mctx->stapling_enabled == TRUE)) {
modssl_init_stapling(s, p, ptemp, mctx);
}
#endif
#ifndef OPENSSL_NO_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);
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);
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
}
#endif
static void 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);
/*
* 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]");
ssl_die(s);
}
cp = apr_pstrcat(p,
(protocol & SSL_PROTOCOL_SSLV3 ? "SSLv3, " : ""),
(protocol & SSL_PROTOCOL_TLSV1 ? "TLSv1, " : ""),
#ifdef HAVE_TLSV1_X
(protocol & SSL_PROTOCOL_TLSV1_1 ? "TLSv1.1, " : ""),
(protocol & SSL_PROTOCOL_TLSV1_2 ? "TLSv1.2, " : ""),
#endif
NULL);
cp[strlen(cp)-2] = NUL;
ap_log_error(APLOG_MARK, APLOG_TRACE3, 0, s,
"Creating new SSL context (protocols: %s)", cp);
if (protocol == SSL_PROTOCOL_SSLV3) {
method = mctx->pkp ?
SSLv3_client_method() : /* proxy */
SSLv3_server_method(); /* server */
}
else 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 */
}
#endif
else { /* For multiple protocols, we need a flexible method */
method = mctx->pkp ?
SSLv23_client_method() : /* proxy */
SSLv23_server_method(); /* server */
}
ctx = SSL_CTX_new(method);
mctx->ssl_ctx = ctx;
SSL_CTX_set_options(ctx, SSL_OP_ALL);
/* always disable SSLv2, as per RFC 6176 */
SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2);
if (!(protocol & SSL_PROTOCOL_SSLV3)) {
SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3);
}
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);
}
#endif
#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);
#elif OPENSSL_VERSION_NUMBER >= 0x00908000L
sk_SSL_COMP_zero(SSL_COMP_get_compression_methods());
#endif
}
#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 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
}
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;
SSL_CTX_set_tmp_rsa_callback(ctx, ssl_callback_TmpRSA);
SSL_CTX_set_tmp_dh_callback(ctx, ssl_callback_TmpDH);
#ifndef OPENSSL_NO_EC
SSL_CTX_set_tmp_ecdh_callback(ctx,ssl_callback_TmpECDH);
#endif
SSL_CTX_set_info_callback(ctx, ssl_callback_Info);
}
static void 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 (!SSL_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);
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");
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*]");
}
}
}
static void 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 = mctx->auth.cipher_suite;
/*
* Configure SSL Cipher Suite
*/
if (!suite) {
return;
}
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);
ssl_die(s);
}
}
static void 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";
/*
* Configure Certificate Revocation List (CRL) Details
*/
if (!(mctx->crl_file || mctx->crl_path)) {
if (mctx->crl_check_mode == SSL_CRLCHECK_LEAF ||
mctx->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);
ssl_die(s);
}
return;
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(01900)
"Configuring certificate revocation facility");
if (!store || !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);
ssl_die(s);
}
switch (mctx->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);
}
}
static void ssl_init_ctx_pkcs7_cert_chain(server_rec *s, modssl_ctx_t *mctx)
{
STACK_OF(X509) *certs = ssl_read_pkcs7(s, mctx->pkcs7);
int n;
STACK_OF(X509) *extra_certs = NULL;
#ifdef OPENSSL_NO_SSL_INTERN
SSL_CTX_get_extra_chain_certs(mctx->ssl_ctx, &extra_certs);
#else
extra_certs = mctx->ssl_ctx->extra_certs;
#endif
if (!extra_certs)
for (n = 1; n < sk_X509_num(certs); ++n)
SSL_CTX_add_extra_chain_cert(mctx->ssl_ctx, sk_X509_value(certs, n));
}
static void 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;
if (mctx->pkcs7) {
ssl_init_ctx_pkcs7_cert_chain(s, mctx);
return;
}
/*
* 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 explicity configure CA certificates which are
* used only for the server certificate chain.
*/
if (!chain) {
return;
}
for (i = 0; (i < SSL_AIDX_MAX) && mctx->pks->cert_files[i]; i++) {
if (strEQ(mctx->pks->cert_files[i], chain)) {
skip_first = TRUE;
break;
}
}
n = SSL_CTX_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!");
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");
}
static void ssl_init_ctx(server_rec *s,
apr_pool_t *p,
apr_pool_t *ptemp,
modssl_ctx_t *mctx)
{
ssl_init_ctx_protocol(s, p, ptemp, mctx);
ssl_init_ctx_session_cache(s, p, ptemp, mctx);
ssl_init_ctx_callbacks(s, p, ptemp, mctx);
ssl_init_ctx_verify(s, p, ptemp, mctx);
ssl_init_ctx_cipher_suite(s, p, ptemp, mctx);
ssl_init_ctx_crl(s, p, ptemp, mctx);
if (mctx->pks) {
/* XXX: proxy support? */
ssl_init_ctx_cert_chain(s, p, ptemp, mctx);
#ifndef OPENSSL_NO_TLSEXT
ssl_init_ctx_tls_extensions(s, p, ptemp, mctx);
#endif
}
}
static int ssl_server_import_cert(server_rec *s,
modssl_ctx_t *mctx,
const char *id,
int idx)
{
SSLModConfigRec *mc = myModConfig(s);
ssl_asn1_t *asn1;
MODSSL_D2I_X509_CONST unsigned char *ptr;
const char *type = ssl_asn1_keystr(idx);
X509 *cert;
if (!(asn1 = ssl_asn1_table_get(mc->tPublicCert, id))) {
return FALSE;
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02232)
"Configuring %s server certificate", type);
ptr = asn1->cpData;
if (!(cert = d2i_X509(NULL, &ptr, asn1->nData))) {
ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02233)
"Unable to import %s server certificate", type);
ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
ssl_die(s);
}
if (SSL_CTX_use_certificate(mctx->ssl_ctx, cert) <= 0) {
ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02234)
"Unable to configure %s server certificate", type);
ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
ssl_die(s);
}
#ifdef HAVE_OCSP_STAPLING
if ((mctx->pkp == FALSE) && (mctx->stapling_enabled == TRUE)) {
if (!ssl_stapling_init_cert(s, mctx, cert)) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(02235)
"Unable to configure server certificate for stapling");
}
}
#endif
mctx->pks->certs[idx] = cert;
return TRUE;
}
static int ssl_server_import_key(server_rec *s,
modssl_ctx_t *mctx,
const char *id,
int idx)
{
SSLModConfigRec *mc = myModConfig(s);
ssl_asn1_t *asn1;
MODSSL_D2I_PrivateKey_CONST unsigned char *ptr;
const char *type = ssl_asn1_keystr(idx);
int pkey_type;
EVP_PKEY *pkey;
#ifndef OPENSSL_NO_EC
if (idx == SSL_AIDX_ECC)
pkey_type = EVP_PKEY_EC;
else
#endif
pkey_type = (idx == SSL_AIDX_RSA) ? EVP_PKEY_RSA : EVP_PKEY_DSA;
if (!(asn1 = ssl_asn1_table_get(mc->tPrivateKey, id))) {
return FALSE;
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02236)
"Configuring %s server private key", type);
ptr = asn1->cpData;
if (!(pkey = d2i_PrivateKey(pkey_type, NULL, &ptr, asn1->nData)))
{
ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02237)
"Unable to import %s server private key", type);
ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
ssl_die(s);
}
if (SSL_CTX_use_PrivateKey(mctx->ssl_ctx, pkey) <= 0) {
ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(02238)
"Unable to configure %s server private key", type);
ssl_log_ssl_error(SSLLOG_MARK, APLOG_EMERG, s);
ssl_die(s);
}
/*
* XXX: wonder if this is still needed, this is old todo doc.
* (see http://www.psy.uq.edu.au/~ftp/Crypto/ssleay/TODO.html)
*/
if ((pkey_type == EVP_PKEY_DSA) && mctx->pks->certs[idx]) {
EVP_PKEY *pubkey = X509_get_pubkey(mctx->pks->certs[idx]);
if (pubkey && EVP_PKEY_missing_parameters(pubkey)) {
EVP_PKEY_copy_parameters(pubkey, pkey);
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(02239)
"Copying DSA parameters from private key to certificate");
ssl_log_ssl_error(SSLLOG_MARK, APLOG_ERR, s);
EVP_PKEY_free(pubkey);
}
}
mctx->pks->keys[idx] = pkey;
return TRUE;
}
static void ssl_check_public_cert(server_rec *s,
apr_pool_t *ptemp,
X509 *cert,
int type)
{
int is_ca, pathlen;
if (!cert) {
return;
}
/*
* Some information about the certificate(s)
*/
if (SSL_X509_isSGC(cert)) {
ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, APLOGNO(01905)
"%s server certificate enables "
"Server Gated Cryptography (SGC)",
ssl_asn1_keystr(type));
}
if (SSL_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 !?)",
ssl_asn1_keystr(type));
}
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 !?)",
ssl_asn1_keystr(type), pathlen);
}
}
if (SSL_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 certificate configured for %s does NOT include "
"an ID which matches the server name",
ssl_asn1_keystr(type), (mySrvConfig(s))->vhost_id);
}
}
static void ssl_init_server_certs(server_rec *s,
apr_pool_t *p,
apr_pool_t *ptemp,
modssl_ctx_t *mctx)
{
const char *rsa_id, *dsa_id;
#ifndef OPENSSL_NO_EC
const char *ecc_id;
#endif
const char *vhost_id = mctx->sc->vhost_id;
int i;
int have_rsa, have_dsa;
#ifndef OPENSSL_NO_EC
int have_ecc;
#endif
rsa_id = ssl_asn1_table_keyfmt(ptemp, vhost_id, SSL_AIDX_RSA);
dsa_id = ssl_asn1_table_keyfmt(ptemp, vhost_id, SSL_AIDX_DSA);
#ifndef OPENSSL_NO_EC
ecc_id = ssl_asn1_table_keyfmt(ptemp, vhost_id, SSL_AIDX_ECC);
#endif
have_rsa = ssl_server_import_cert(s, mctx, rsa_id, SSL_AIDX_RSA);
have_dsa = ssl_server_import_cert(s, mctx, dsa_id, SSL_AIDX_DSA);
#ifndef OPENSSL_NO_EC
have_ecc = ssl_server_import_cert(s, mctx, ecc_id, SSL_AIDX_ECC);
#endif
if (!(have_rsa || have_dsa
#ifndef OPENSSL_NO_EC
|| have_ecc
#endif
)) {
ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01910)
"Oops, no " KEYTYPES " server certificate found "
"for '%s:%d'?!", s->server_hostname, s->port);
ssl_die(s);
}
for (i = 0; i < SSL_AIDX_MAX; i++) {
ssl_check_public_cert(s, ptemp, mctx->pks->certs[i], i);
}
have_rsa = ssl_server_import_key(s, mctx, rsa_id, SSL_AIDX_RSA);
have_dsa = ssl_server_import_key(s, mctx, dsa_id, SSL_AIDX_DSA);
#ifndef OPENSSL_NO_EC
have_ecc = ssl_server_import_key(s, mctx, ecc_id, SSL_AIDX_ECC);
#endif
if (!(have_rsa || have_dsa
#ifndef OPENSSL_NO_EC
|| have_ecc
#endif
)) {
ap_log_error(APLOG_MARK, APLOG_EMERG, 0, s, APLOGNO(01911)
"Oops, no " KEYTYPES " server private key found?!");
ssl_die(s);
}
}
#ifdef HAVE_TLS_SESSION_TICKETS
static void 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;
if (!ticket_key->file_path) {
return;
}
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);
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);
ssl_die(s);
}
memcpy(ticket_key->key_name, buf, 16);
memcpy(ticket_key->hmac_secret, buf + 16, 16);
memcpy(ticket_key->aes_key, buf + 32, 16);
if (!SSL_CTX_set_tlsext_ticket_key_cb(mctx->ssl_ctx,
ssl_callback_SessionTicket)) {
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);
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);
}
#endif
static void 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);
SSL_CTX_set_client_cert_cb(mctx->ssl_ctx,
ssl_callback_proxy_cert);
if (!(pkp->cert_file || pkp->cert_path)) {
return;
}
sk = sk_X509_INFO_new_null();
if (pkp->cert_file) {
SSL_X509_INFO_load_file(ptemp, sk, pkp->cert_file);
}
if (pkp->cert_path) {
SSL_X509_INFO_load_path(ptemp, sk, pkp->cert_path);
}
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;
}
/* 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?)");
ssl_die(s);
return;
}
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);
ssl_die(s);
return;
}
}
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;
}
/* 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);
ssl_die(s);
}
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), "%i:", j);
}
}
}
/* get ready for next X509_STORE_CTX_init */
X509_STORE_CTX_cleanup(sctx);
}
X509_STORE_CTX_free(sctx);
}
static void ssl_init_proxy_ctx(server_rec *s,
apr_pool_t *p,
apr_pool_t *ptemp,
SSLSrvConfigRec *sc)
{
ssl_init_ctx(s, p, ptemp, sc->proxy);
ssl_init_proxy_certs(s, p, ptemp, sc->proxy);
}
static void ssl_init_server_ctx(server_rec *s,
apr_pool_t *p,
apr_pool_t *ptemp,
SSLSrvConfigRec *sc)
{
ssl_init_server_check(s, p, ptemp, sc->server);
ssl_init_ctx(s, p, ptemp, sc->server);
ssl_init_server_certs(s, p, ptemp, sc->server);
#ifdef HAVE_TLS_SESSION_TICKETS
ssl_init_ticket_key(s, p, ptemp, sc->server);
#endif
}
/*
* Configure a particular server
*/
void ssl_init_ConfigureServer(server_rec *s,
apr_pool_t *p,
apr_pool_t *ptemp,
SSLSrvConfigRec *sc)
{
/* 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);
ssl_init_server_ctx(s, p, ptemp, sc);
}
if (sc->proxy_enabled) {
ssl_init_proxy_ctx(s, p, ptemp, sc);
}
}
void ssl_init_CheckServers(server_rec *base_server, apr_pool_t *p)
{
server_rec *s, *ps;
SSLSrvConfigRec *sc;
apr_hash_t *table;
const char *key;
apr_ssize_t klen;
BOOL conflict = FALSE;
/*
* 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);
}
}
/*
* Give out warnings when more than one SSL-aware virtual server uses the
* same IP:port. This doesn't work because mod_ssl then will always use
* just the certificate/keys of one virtual host (which one cannot be said
* easily - but that doesn't matter here).
*/
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))) {
#ifdef OPENSSL_NO_TLSEXT
int level = APLOG_WARNING;
const char *problem = "conflict";
#else
int level = APLOG_DEBUG;
const char *problem = "overlap";
#endif
ap_log_error(APLOG_MARK, level, 0, base_server,
"Init: SSL server IP/port %s: "
"%s (%s:%d) vs. %s (%s:%d)",
problem, 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) {
#ifdef OPENSSL_NO_TLSEXT
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, base_server, APLOGNO(01917)
"Init: You should not use name-based "
"virtual hosts in conjunction with SSL!!");
#else
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, base_server, APLOGNO(02292)
"Init: Name-based SSL virtual hosts only "
"work for clients with TLS server name indication "
"support (RFC 4366)");
#endif
}
}
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",
SSL_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);
}
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) {
apr_dir_t *dir;
apr_finfo_t direntry;
apr_int32_t finfo_flags = APR_FINFO_TYPE|APR_FINFO_NAME;
apr_status_t rv;
if ((rv = apr_dir_open(&dir, ca_path, ptemp)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, APLOGNO(02211)
"Failed to open Certificate Path `%s'",
ca_path);
ssl_die(s);
}
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, ca_path, "/", direntry.name, NULL);
ssl_init_PushCAList(ca_list, s, ptemp, file);
}
apr_dir_close(dir);
}
/*
* 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
}
#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);
#ifndef OPENSSL_NO_SRP
if (mctx->srp_vbase != NULL) {
SRP_VBASE_free(mctx->srp_vbase);
mctx->srp_vbase = NULL;
}
#endif
}
static void ssl_init_ctx_cleanup_proxy(modssl_ctx_t *mctx)
{
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;
}
}
static void ssl_init_ctx_cleanup_server(modssl_ctx_t *mctx)
{
int i;
ssl_init_ctx_cleanup(mctx);
for (i=0; i < SSL_AIDX_MAX; i++) {
MODSSL_CFG_ITEM_FREE(X509_free,
mctx->pks->certs[i]);
MODSSL_CFG_ITEM_FREE(EVP_PKEY_free,
mctx->pks->keys[i]);
}
}
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);
/*
* Destroy the temporary keys and params
*/
ssl_tmp_keys_free(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_proxy(sc->proxy);
ssl_init_ctx_cleanup_server(sc->server);
}
return APR_SUCCESS;
}
