ssl_engine_init.c revision 434ad3e8e769a6a7a78c15f3ae2f7ae3adbfbb49
/* _ _
** _ __ ___ ___ __| | ___ ___| | mod_ssl
** | '_ ` _ \ / _ \ / _` | / __/ __| | Apache Interface to OpenSSL
** | | | | | | (_) | (_| | \__ \__ \ | www.modssl.org
** |_| |_| |_|\___/ \__,_|___|___/___/_| ftp.modssl.org
** |_____|
** ssl_engine_init.c
** Initialization of Servers
*/
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*/
/* ``Recursive, adj.;
see Recursive.''
-- Unknown */
#include "mod_ssl.h"
/* _________________________________________________________________
**
** Module Initialization
** _________________________________________________________________
*/
static char *ssl_add_version_component(apr_pool_t *p,
server_rec *s,
char *name)
{
char *val = ssl_var_lookup(p, s, NULL, NULL, name);
if (val && *val) {
ap_add_version_component(p, val);
}
return val;
}
static char *version_components[] = {
"SSL_VERSION_PRODUCT",
"SSL_VERSION_INTERFACE",
"SSL_VERSION_LIBRARY",
NULL
};
static void ssl_add_version_components(apr_pool_t *p,
server_rec *s)
{
char *vals[sizeof(version_components)/sizeof(char *)];
int i;
for (i=0; version_components[i]; i++) {
vals[i] = ssl_add_version_component(p, s,
version_components[i]);
}
ap_log_error(APLOG_MARK, APLOG_INFO, 0, s,
"Server: %s, Interface: %s, Library: %s",
AP_SERVER_BASEVERSION,
vals[1], /* SSL_VERSION_INTERFACE */
vals[2]); /* SSL_VERSION_LIBRARY */
}
/*
* Initialize SSL library
*/
static void ssl_init_SSLLibrary(server_rec *s)
{
ap_log_error(APLOG_MARK, APLOG_INFO, 0, s,
"Init: Initializing %s library", SSL_LIBRARY_NAME);
CRYPTO_malloc_init();
SSL_load_error_strings();
SSL_library_init();
}
/*
* 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);
}
static int ssl_tmp_key_init_rsa(server_rec *s,
int bits, int idx)
{
SSLModConfigRec *mc = myModConfig(s);
if (!(mc->pTmpKeys[idx] =
RSA_generate_key(bits, RSA_F4, NULL, NULL)))
{
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"Init: Failed to generate temporary "
"%d bit RSA private key", bits);
return !OK;
}
return OK;
}
static int ssl_tmp_key_init_dh(server_rec *s,
int bits, int idx)
{
SSLModConfigRec *mc = myModConfig(s);
if (!(mc->pTmpKeys[idx] =
ssl_dh_GetTmpParam(bits)))
{
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"Init: Failed to generate temporary "
"%d bit DH parameters", bits);
return !OK;
}
return OK;
}
#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_INFO, 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_INFO, 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;
}
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;
/*
* Let us cleanup on restarts and exists
*/
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 0
/* If sc->enabled is UNSET, then SSL is optional on this vhost */
/* Fix up stuff that may not have been set */
if (sc->enabled == UNSET) {
sc->enabled = FALSE;
}
#endif
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->pphrase_dialog_type == SSL_PPTYPE_UNSET) {
sc->server->pphrase_dialog_type = SSL_PPTYPE_BUILTIN;
}
}
/*
* SSL external crypto device ("engine") support
*/
#ifdef SSL_EXPERIMENTAL_ENGINE
ssl_init_Engine(base_server, p);
#endif
ssl_init_SSLLibrary(base_server);
#if APR_HAS_THREADS
ssl_util_thread_setup(p);
#endif
/*
* 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: ");
/*
* 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;
}
/*
* initialize session caching
*/
ssl_scache_init(base_server, p);
/*
* initialize servers
*/
ap_log_error(APLOG_MARK, APLOG_INFO, 0, base_server,
"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.
*/
#ifdef SSL_EXPERIMENTAL_ENGINE
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_ERR, 0, s,
"Init: Failed to load Crypto Device API `%s'",
mc->szCryptoDevice);
ssl_die();
}
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_ERR, 0, s,
"Init: Failed to enable Crypto Device API `%s'",
mc->szCryptoDevice);
ssl_die();
}
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]) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"No SSL Certificate set [hint: SSLCertificateFile]");
ssl_die();
}
/*
* Check for problematic re-initializations
*/
if (mctx->pks->certs[SSL_AIDX_RSA] ||
mctx->pks->certs[SSL_AIDX_DSA])
{
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"Illegal attempt to re-initialise SSL for server "
"(theoretically shouldn't happen!)");
ssl_die();
}
}
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;
SSL_METHOD *method = NULL;
char *cp;
int protocol = mctx->protocol;
/*
* Create the new per-server SSL context
*/
if (protocol == SSL_PROTOCOL_NONE) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"No SSL protocols available [hint: SSLProtocol]");
ssl_die();
}
cp = apr_pstrcat(p,
(protocol & SSL_PROTOCOL_SSLV2 ? "SSLv2, " : ""),
(protocol & SSL_PROTOCOL_SSLV3 ? "SSLv3, " : ""),
(protocol & SSL_PROTOCOL_TLSV1 ? "TLSv1, " : ""),
NULL);
cp[strlen(cp)-2] = NUL;
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
"Creating new SSL context (protocols: %s)", cp);
if (protocol == SSL_PROTOCOL_SSLV2) {
method = mctx->pkp ?
SSLv2_client_method() : /* proxy */
SSLv2_server_method(); /* server */
ctx = SSL_CTX_new(method); /* only SSLv2 is left */
}
else {
method = mctx->pkp ?
SSLv23_client_method() : /* proxy */
SSLv23_server_method(); /* server */
ctx = SSL_CTX_new(method); /* be more flexible */
}
mctx->ssl_ctx = ctx;
SSL_CTX_set_options(ctx, SSL_OP_ALL);
if (!(protocol & SSL_PROTOCOL_SSLV2)) {
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);
}
SSL_CTX_set_app_data(ctx, s);
/*
* Configure additional context ingredients
*/
SSL_CTX_set_options(ctx, SSL_OP_SINGLE_DH_USE);
}
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);
long cache_mode = SSL_SESS_CACHE_OFF;
if (mc->nSessionCacheMode != SSL_SCMODE_NONE) {
/* SSL_SESS_CACHE_NO_INTERNAL_LOOKUP will force OpenSSL
* to ignore process local-caching and
* to always get/set/delete sessions using mod_ssl's callbacks.
*/
cache_mode = SSL_SESS_CACHE_SERVER|SSL_SESS_CACHE_NO_INTERNAL_LOOKUP;
}
SSL_CTX_set_session_cache_mode(ctx, cache_mode);
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);
if (s->loglevel >= APLOG_DEBUG) {
/* this callback only logs if LogLevel >= info */
SSL_CTX_set_info_callback(ctx, ssl_callback_LogTracingState);
}
}
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_DEBUG, 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_ERR, 0, s,
"Unable to configure verify locations "
"for client authentication");
ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s);
ssl_die();
}
ca_list = ssl_init_FindCAList(s, ptemp,
mctx->auth.ca_cert_file,
mctx->auth.ca_cert_path);
if (!ca_list) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"Unable to determine list of available "
"CA certificates for client authentication");
ssl_die();
}
SSL_CTX_set_client_CA_list(ctx, (STACK *)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 = (STACK_OF(X509_NAME) *)SSL_CTX_get_client_CA_list(ctx);
if (sk_X509_NAME_num(ca_list) == 0) {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s,
"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_DEBUG, 0, s,
"Configuring permitted SSL ciphers [%s]",
suite);
if (!SSL_CTX_set_cipher_list(ctx, suite)) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"Unable to configure permitted SSL ciphers");
ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s);
ssl_die();
}
}
static void ssl_init_ctx_crl(server_rec *s,
apr_pool_t *p,
apr_pool_t *ptemp,
modssl_ctx_t *mctx)
{
/*
* Configure Certificate Revocation List (CRL) Details
*/
if (!(mctx->crl_file || mctx->crl_path)) {
return;
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
"Configuring certificate revocation facility");
mctx->crl =
SSL_X509_STORE_create((char *)mctx->crl_file,
(char *)mctx->crl_path);
if (!mctx->crl) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"Unable to configure X.509 CRL storage "
"for certificate revocation");
ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s);
ssl_die();
}
}
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 = TRUE;
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 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_ERR, 0, s,
"Failed to configure CA certificate chain!");
ssl_die();
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
"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);
}
}
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;
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,
"Configuring %s server certificate", type);
ptr = asn1->cpData;
if (!(cert = d2i_X509(NULL, &ptr, asn1->nData))) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"Unable to import %s server certificate", type);
ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s);
ssl_die();
}
if (SSL_CTX_use_certificate(mctx->ssl_ctx, cert) <= 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"Unable to configure %s server certificate", type);
ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s);
ssl_die();
}
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;
unsigned char *ptr;
const char *type = ssl_asn1_keystr(idx);
int pkey_type = (idx == SSL_AIDX_RSA) ? EVP_PKEY_RSA : EVP_PKEY_DSA;
EVP_PKEY *pkey;
if (!(asn1 = ssl_asn1_table_get(mc->tPrivateKey, id))) {
return FALSE;
}
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
"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_ERR, 0, s,
"Unable to import %s server private key", type);
ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s);
ssl_die();
}
if (SSL_CTX_use_PrivateKey(mctx->ssl_ctx, pkey) <= 0) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"Unable to configure %s server private key", type);
ssl_log_ssl_error(APLOG_MARK, APLOG_ERR, s);
ssl_die();
}
/*
* 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,
"Copying DSA parameters from private key to certificate");
ssl_log_ssl_error(APLOG_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;
char *cn;
if (!cert) {
return;
}
/*
* Some information about the certificate(s)
*/
if (SSL_X509_isSGC(cert)) {
ap_log_error(APLOG_MARK, APLOG_INFO, 0, s,
"%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,
"%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,
"%s server certificate is not a leaf certificate "
"(BasicConstraints: pathlen == %d > 0 !?)",
ssl_asn1_keystr(type), pathlen);
}
}
if (SSL_X509_getCN(ptemp, cert, &cn)) {
int fnm_flags = FNM_PERIOD|FNM_CASE_BLIND;
if (apr_fnmatch_test(cn) &&
(apr_fnmatch(cn, s->server_hostname,
fnm_flags) == FNM_NOMATCH))
{
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s,
"%s server certificate wildcard CommonName (CN) `%s' "
"does NOT match server name!?",
ssl_asn1_keystr(type), cn);
}
else if (strNE(s->server_hostname, cn)) {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s,
"%s server certificate CommonName (CN) `%s' "
"does NOT match server name!?",
ssl_asn1_keystr(type), cn);
}
}
}
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;
const char *vhost_id = mctx->sc->vhost_id;
int i;
int have_rsa, have_dsa;
rsa_id = ssl_asn1_table_keyfmt(ptemp, vhost_id, SSL_AIDX_RSA);
dsa_id = ssl_asn1_table_keyfmt(ptemp, vhost_id, SSL_AIDX_DSA);
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);
if (!(have_rsa || have_dsa)) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"Oops, no RSA or DSA server certificate found?!");
ssl_die();
}
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);
if (!(have_rsa || have_dsa)) {
ap_log_error(APLOG_MARK, APLOG_ERR, 0, s,
"Oops, no RSA or DSA server private key found?!");
ssl_die();
}
}
static void ssl_init_proxy_certs(server_rec *s,
apr_pool_t *p,
apr_pool_t *ptemp,
modssl_ctx_t *mctx)
{
int ncerts = 0;
STACK_OF(X509_INFO) *sk;
modssl_pk_proxy_t *pkp = mctx->pkp;
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) {
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
"loaded %d client certs for SSL proxy",
ncerts);
pkp->certs = sk;
}
else {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, s,
"no client certs found for SSL proxy");
sk_X509_INFO_free(sk);
}
}
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);
}
/*
* Configure a particular server
*/
void ssl_init_ConfigureServer(server_rec *s,
apr_pool_t *p,
apr_pool_t *ptemp,
SSLSrvConfigRec *sc)
{
/* A bit of a hack, but initialize the server if SSL is optional or
* not.
*/
if (sc->enabled) {
ap_log_error(APLOG_MARK, APLOG_INFO, 0, s,
"Configuring server for SSL protocol");
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 == TRUE) && (s->port == DEFAULT_HTTP_PORT)) {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0,
base_server,
"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 && (s->port == DEFAULT_HTTPS_PORT)) {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0,
base_server,
"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) {
sc = mySrvConfig(s);
if (!(sc->enabled && s->addrs)) {
continue;
}
key = apr_psprintf(p, "%pA:%u",
&s->addrs->host_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,
"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,
"Init: You should not use name-based "
"virtual hosts in conjunction with SSL!!");
}
}
static int ssl_init_FindCAList_X509NameCmp(X509_NAME **a, X509_NAME **b)
{
return(X509_NAME_cmp(*a, *b));
}
static void ssl_init_PushCAList(STACK_OF(X509_NAME) *ca_list,
server_rec *s, 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++) {
char name_buf[256];
X509_NAME *name = sk_X509_NAME_value(sk, n);
ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
"CA certificate: %s",
X509_NAME_oneline(name, name_buf, sizeof(name_buf)));
/*
* 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, ca_file);
}
/*
* Process CA certificate path files
*/
if (ca_path) {
apr_dir_t *dir;
apr_finfo_t direntry;
apr_int32_t finfo_flags = APR_FINFO_MIN|APR_FINFO_NAME;
apr_status_t rv;
if ((rv = apr_dir_open(&dir, ca_path, ptemp)) != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, rv, s,
"Failed to open SSLCACertificatePath `%s'",
ca_path);
ssl_die();
}
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, file);
}
apr_dir_close(dir);
}
/*
* Cleanup
*/
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);
}
#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(X509_STORE_free, mctx->crl);
MODSSL_CFG_ITEM_FREE(SSL_CTX_free, mctx->ssl_ctx);
}
static void ssl_init_ctx_cleanup_proxy(modssl_ctx_t *mctx)
{
ssl_init_ctx_cleanup(mctx);
if (mctx->pkp->certs) {
sk_X509_INFO_pop_free(mctx->pkp->certs, X509_INFO_free);
}
}
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);
}
/*
* Try to kill the internals of the SSL library.
*/
ERR_free_strings();
ERR_remove_state(0);
EVP_cleanup();
return APR_SUCCESS;
}