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/*
* mod_gnutls - TLS listen support
*
* TODO:
* * support client certificate authentication: http://www.gnutls.org/manual/gnutls.html#Client-certificate-authentication
* gnutls_certificate_set_x509_system_trust (available since 3.0 (docs) or 3.0.19 (weechat ??))
* gnutls_certificate_set_x509_trust_file
* * TLS session tickets are always activated with gnutls >= 2.10 - option to disable
* * OCSP stapling
*
* Author:
* Copyright (c) 2013 Stefan Bühler
*/
#include <lighttpd/base.h>
#include <lighttpd/throttle.h>
#include "gnutls_filter.h"
#include "ssl_client_hello_parser.h"
#include "ssl-session-db.h"
#include <gnutls/gnutls.h>
#if GNUTLS_VERSION_NUMBER >= 0x020a00
#define HAVE_SESSION_TICKET
#endif
LI_API gboolean mod_gnutls_init(liModules *mods, liModule *mod);
LI_API gboolean mod_gnutls_free(liModules *mods, liModule *mod);
static int load_dh_params_4096(gnutls_dh_params_t *dh_params);
typedef struct mod_connection_ctx mod_connection_ctx;
typedef struct mod_context mod_context;
struct mod_connection_ctx {
gnutls_session_t session;
liConnection *con;
mod_context *ctx;
liGnuTLSFilter *tls_filter;
liIOStream *sock_stream;
gpointer simple_socket_data;
liStream *client_hello_stream;
#ifdef USE_SNI
liJob sni_job;
liJobRef *sni_jobref;
liFetchEntry *sni_entry;
liFetchWait *sni_db_wait;
GString *sni_server_name;
#endif
};
struct mod_context {
gint refcount;
liSSLSessionDB *session_db;
gnutls_certificate_credentials_t server_cert;
gnutls_dh_params_t dh_params;
gnutls_priority_t server_priority;
gnutls_priority_t server_priority_beast;
#ifdef HAVE_SESSION_TICKET
gnutls_datum_t ticket_key;
#endif
#ifdef USE_SNI
liFetchDatabase *sni_db, *sni_backend_db;
gnutls_certificate_credentials_t sni_fallback_cert;
#endif
unsigned int protect_against_beast:1;
};
#ifdef USE_SNI
typedef struct fetch_cert_backend_lookup fetch_cert_backend_lookup;
struct fetch_cert_backend_lookup {
liFetchWait *wait;
liFetchEntry *entry;
mod_context *ctx;
};
#endif
static void mod_gnutls_context_release(mod_context *ctx);
static void mod_gnutls_context_acquire(mod_context *ctx);
#ifdef USE_SNI
static gnutls_certificate_credentials_t creds_from_gstring(mod_context *ctx, GString *str) {
gnutls_certificate_credentials_t creds = NULL;
gnutls_datum_t pemfile;
int r;
if (NULL == str) return NULL;
if (GNUTLS_E_SUCCESS != (r = gnutls_certificate_allocate_credentials(&creds))) return NULL;
pemfile.data = (unsigned char*) str->str;
pemfile.size = str->len;
if (GNUTLS_E_SUCCESS != (r = gnutls_certificate_set_x509_key_mem(creds, &pemfile, &pemfile, GNUTLS_X509_FMT_PEM))) {
goto error_free_creds;
}
gnutls_certificate_set_dh_params(creds, ctx->dh_params);
return creds;
error_free_creds:
gnutls_certificate_free_credentials(creds);
return NULL;
}
static void fetch_cert_backend_ready(gpointer data) {
liFetchEntry *be;
fetch_cert_backend_lookup *lookup = (fetch_cert_backend_lookup*) data;
be = li_fetch_get2(lookup->ctx->sni_backend_db, lookup->entry->key, fetch_cert_backend_ready, lookup, &lookup->wait);
if (NULL != be) {
liFetchEntry *entry = lookup->entry;
mod_context *ctx = lookup->ctx;
g_slice_free(fetch_cert_backend_lookup, lookup);
entry->backend_data = be;
entry->data = creds_from_gstring(ctx, (GString*) be->data);
li_fetch_entry_ready(entry);
}
}
static void fetch_cert_lookup(liFetchDatabase* db, gpointer data, liFetchEntry *entry) {
fetch_cert_backend_lookup *lookup = g_slice_new0(fetch_cert_backend_lookup);
UNUSED(db);
lookup->ctx = (mod_context*) data;
lookup->entry = entry;
fetch_cert_backend_ready(lookup);
}
static gboolean fetch_cert_revalidate(liFetchDatabase* db, gpointer data, liFetchEntry *entry) {
UNUSED(db); UNUSED(data);
return li_fetch_entry_revalidate((liFetchEntry*) entry->backend_data);
}
static void fetch_cert_refresh(liFetchDatabase* db, gpointer data, liFetchEntry *cur_entry, liFetchEntry *new_entry) {
UNUSED(db); UNUSED(data);
li_fetch_entry_refresh((liFetchEntry*) cur_entry->backend_data);
li_fetch_entry_refresh_skip(new_entry);
}
static void fetch_cert_free_entry(gpointer data, liFetchEntry *entry) {
gnutls_certificate_credentials_t creds = entry->data;
UNUSED(data);
if (NULL != creds) gnutls_certificate_free_credentials(creds);
li_fetch_entry_release((liFetchEntry*) entry->backend_data);
}
static void fetch_cert_free_db(gpointer data) {
mod_context *ctx = (mod_context*) data;
mod_gnutls_context_release(ctx);
}
static const liFetchCallbacks fetch_cert_callbacks = {
fetch_cert_lookup,
fetch_cert_revalidate,
fetch_cert_refresh,
fetch_cert_free_entry,
fetch_cert_free_db
};
#endif
static void mod_gnutls_context_release(mod_context *ctx) {
if (!ctx) return;
LI_FORCE_ASSERT(g_atomic_int_get(&ctx->refcount) > 0);
if (g_atomic_int_dec_and_test(&ctx->refcount)) {
gnutls_priority_deinit(ctx->server_priority_beast);
gnutls_priority_deinit(ctx->server_priority);
gnutls_certificate_free_credentials(ctx->server_cert);
#ifdef HAVE_SESSION_TICKET
/* wtf. why is there no function in gnutls for this... */
if (NULL != ctx->ticket_key.data) {
gnutls_free(ctx->ticket_key.data);
ctx->ticket_key.data = NULL;
ctx->ticket_key.size = 0;
}
#endif
li_ssl_session_db_free(ctx->session_db);
ctx->session_db = NULL;
#ifdef USE_SNI
if (NULL != ctx->sni_db) {
li_fetch_database_release(ctx->sni_db);
ctx->sni_db = NULL;
}
if (NULL != ctx->sni_backend_db) {
li_fetch_database_release(ctx->sni_backend_db);
ctx->sni_backend_db = NULL;
}
if (NULL != ctx->sni_fallback_cert) {
gnutls_certificate_free_credentials(ctx->sni_fallback_cert);
ctx->sni_fallback_cert = NULL;
}
#endif
gnutls_dh_params_deinit(ctx->dh_params);
g_slice_free(mod_context, ctx);
}
}
static void mod_gnutls_context_acquire(mod_context *ctx) {
LI_FORCE_ASSERT(g_atomic_int_get(&ctx->refcount) > 0);
g_atomic_int_inc(&ctx->refcount);
}
static mod_context *mod_gnutls_context_new(liServer *srv) {
mod_context *ctx = g_slice_new0(mod_context);
int r;
if (GNUTLS_E_SUCCESS != (r = gnutls_certificate_allocate_credentials(&ctx->server_cert))) {
ERROR(srv, "gnutls_certificate_allocate_credentials failed(%s): %s",
gnutls_strerror_name(r), gnutls_strerror(r));
goto error0;
}
if (GNUTLS_E_SUCCESS != (r = gnutls_priority_init(&ctx->server_priority, "NORMAL", NULL))) {
ERROR(srv, "gnutls_priority_init('NORMAL') failed(%s): %s",
gnutls_strerror_name(r), gnutls_strerror(r));
goto error1;
}
if (GNUTLS_E_SUCCESS != (r = gnutls_priority_init(&ctx->server_priority_beast, "NORMAL:-CIPHER-ALL:+ARCFOUR-128", NULL))) {
int r1;
if (GNUTLS_E_SUCCESS != (r1 = gnutls_priority_init(&ctx->server_priority_beast, "NORMAL", NULL))) {
ERROR(srv, "gnutls_priority_init('NORMAL') failed(%s): %s",
gnutls_strerror_name(r1), gnutls_strerror(r1));
goto error2;
} else {
ERROR(srv, "gnutls_priority_init('NORMAL:-CIPHER-ALL:+ARCFOUR-128') failed(%s): %s. Using 'NORMAL' instead (BEAST mitigation not available)",
gnutls_strerror_name(r), gnutls_strerror(r));
}
}
#ifdef HAVE_SESSION_TICKET
if (GNUTLS_E_SUCCESS != (r = gnutls_session_ticket_key_generate(&ctx->ticket_key))) {
ERROR(srv, "gnutls_session_ticket_key_generate failed(%s): %s",
gnutls_strerror_name(r), gnutls_strerror(r));
goto error3;
}
#endif
ctx->refcount = 1;
ctx->protect_against_beast = 1;
return ctx;
error3:
gnutls_priority_deinit(ctx->server_priority_beast);
error2:
gnutls_priority_deinit(ctx->server_priority);
error1:
gnutls_certificate_free_credentials(ctx->server_cert);
error0:
g_slice_free(mod_context, ctx);
return NULL;
}
static void tcp_io_cb(liIOStream *stream, liIOStreamEvent event) {
mod_connection_ctx *conctx = stream->data;
LI_FORCE_ASSERT(NULL == conctx->sock_stream || conctx->sock_stream == stream);
if (LI_IOSTREAM_DESTROY == event) {
li_stream_simple_socket_close(stream, TRUE); /* kill it, ssl sent an close alert message */
}
li_connection_simple_tcp(&conctx->con, stream, &conctx->simple_socket_data, event);
if (NULL != conctx->con && conctx->con->out_has_all_data
&& (NULL == stream->stream_out.out || 0 == stream->stream_out.out->length)
&& li_streams_empty(conctx->con->con_sock.raw_out, NULL)) {
li_stream_simple_socket_flush(stream);
li_connection_request_done(conctx->con);
}
switch (event) {
case LI_IOSTREAM_DESTROY:
LI_FORCE_ASSERT(NULL == conctx->sock_stream);
LI_FORCE_ASSERT(NULL == conctx->tls_filter);
LI_FORCE_ASSERT(NULL == conctx->con);
stream->data = NULL;
g_slice_free(mod_connection_ctx, conctx);
return;
default:
break;
}
}
static void handshake_cb(liGnuTLSFilter *f, gpointer data, liStream *plain_source, liStream *plain_drain) {
mod_connection_ctx *conctx = data;
liConnection *con = conctx->con;
UNUSED(f);
if (NULL != con) {
li_stream_connect(plain_source, con->con_sock.raw_in);
li_stream_connect(con->con_sock.raw_out, plain_drain);
} else {
li_stream_reset(plain_source);
li_stream_reset(plain_drain);
}
}
static void close_cb(liGnuTLSFilter *f, gpointer data) {
mod_connection_ctx *conctx = data;
liConnection *con = conctx->con;
LI_FORCE_ASSERT(conctx->tls_filter == f);
conctx->tls_filter = NULL;
li_gnutls_filter_free(f);
gnutls_deinit(conctx->session);
if (NULL != conctx->ctx) {
mod_gnutls_context_release(conctx->ctx);
conctx->ctx = NULL;
}
if (NULL != conctx->con) {
liStream *raw_out = con->con_sock.raw_out, *raw_in = con->con_sock.raw_in;
LI_FORCE_ASSERT(con->con_sock.data == conctx);
conctx->con = NULL;
con->con_sock.data = NULL;
con->con_sock.callbacks = NULL;
li_stream_acquire(raw_in);
li_stream_reset(raw_out);
li_stream_reset(raw_in);
li_stream_release(raw_in);
}
#ifdef USE_SNI
if (NULL != conctx->sni_db_wait) {
li_fetch_cancel(&conctx->sni_db_wait);
}
if (NULL != conctx->sni_entry) {
li_fetch_entry_release(conctx->sni_entry);
conctx->sni_entry = NULL;
}
#endif
if (NULL != conctx->client_hello_stream) {
li_ssl_client_hello_stream_ready(conctx->client_hello_stream);
li_stream_release(conctx->client_hello_stream);
conctx->client_hello_stream = NULL;
}
#ifdef USE_SNI
if (NULL != conctx->sni_jobref) {
li_job_ref_release(conctx->sni_jobref);
conctx->sni_jobref = NULL;
}
li_job_clear(&conctx->sni_job);
if (NULL != conctx->sni_server_name) {
g_string_free(conctx->sni_server_name, TRUE);
conctx->sni_server_name = NULL;
}
#endif
LI_FORCE_ASSERT(NULL != conctx->sock_stream);
li_iostream_safe_release(&conctx->sock_stream);
}
static int session_db_store_cb(void *_sdb, gnutls_datum_t key, gnutls_datum_t data) {
liSSLSessionDB *sdb = _sdb;
li_ssl_session_db_store(sdb, key.data, key.size, data.data, data.size);
return 0;
}
static int session_db_remove_cb(void *_sdb, gnutls_datum_t key) {
liSSLSessionDB *sdb = _sdb;
li_ssl_session_db_remove(sdb, key.data, key.size);
return 0;
}
static gnutls_datum_t session_db_retrieve_cb(void *_sdb, gnutls_datum_t key) {
liSSLSessionDB *sdb = _sdb;
liSSLSessionDBData *data = li_ssl_session_db_lookup(sdb, key.data, key.size);
gnutls_datum_t result = { NULL, 0 };
if (NULL != data) {
result.size = data->size;
result.data = gnutls_malloc(result.size);
memcpy(result.data, data->data, result.size);
li_ssl_session_db_data_release(data);
}
return result;
}
static const liGnuTLSFilterCallbacks filter_callbacks = {
handshake_cb,
close_cb,
NULL
};
static void gnutls_tcp_finished(liConnection *con, gboolean aborted) {
mod_connection_ctx *conctx = con->con_sock.data;
UNUSED(aborted);
con->info.is_ssl = FALSE;
con->con_sock.callbacks = NULL;
if (NULL != conctx) {
LI_FORCE_ASSERT(con == conctx->con);
close_cb(conctx->tls_filter, conctx);
LI_FORCE_ASSERT(NULL == con->con_sock.data);
}
{
liStream *raw_out = con->con_sock.raw_out, *raw_in = con->con_sock.raw_in;
con->con_sock.raw_out = con->con_sock.raw_in = NULL;
if (NULL != raw_out) { li_stream_reset(raw_out); li_stream_release(raw_out); }
if (NULL != raw_in) { li_stream_reset(raw_in); li_stream_release(raw_in); }
}
}
static liThrottleState* gnutls_tcp_throttle_out(liConnection *con) {
mod_connection_ctx *conctx = con->con_sock.data;
if (NULL == conctx) return NULL;
if (NULL == conctx->sock_stream->throttle_out) conctx->sock_stream->throttle_out = li_throttle_new();
return conctx->sock_stream->throttle_out;
}
static liThrottleState* gnutls_tcp_throttle_in(liConnection *con) {
mod_connection_ctx *conctx = con->con_sock.data;
if (NULL == conctx) return NULL;
if (NULL == conctx->sock_stream->throttle_in) conctx->sock_stream->throttle_in = li_throttle_new();
return conctx->sock_stream->throttle_in;
}
static const liConnectionSocketCallbacks gnutls_tcp_cbs = {
gnutls_tcp_finished,
gnutls_tcp_throttle_out,
gnutls_tcp_throttle_in
};
#ifdef USE_SNI
static void sni_job_cb(liJob *job) {
mod_connection_ctx *conctx = LI_CONTAINER_OF(job, mod_connection_ctx, sni_job);
LI_FORCE_ASSERT(NULL != conctx->client_hello_stream);
conctx->sni_entry = li_fetch_get(conctx->ctx->sni_db, conctx->sni_server_name, conctx->sni_jobref, &conctx->sni_db_wait);
if (conctx->sni_entry != NULL) {
gnutls_certificate_credentials_t creds = conctx->sni_entry->data;
if (NULL != creds) {
gnutls_credentials_set(conctx->session, GNUTLS_CRD_CERTIFICATE, creds);
} else if (NULL != conctx->ctx->sni_fallback_cert) {
gnutls_credentials_set(conctx->session, GNUTLS_CRD_CERTIFICATE, conctx->ctx->sni_fallback_cert);
}
li_ssl_client_hello_stream_ready(conctx->client_hello_stream);
}
}
#endif
static void gnutls_client_hello_cb(gpointer data, gboolean success, GString *server_name, guint16 protocol) {
mod_connection_ctx *conctx = data;
if (conctx->ctx->protect_against_beast) {
if (!success || protocol <= 0x0301) { /* SSL3: 0x0300, TLS1.0: 0x0301 */
gnutls_priority_set(conctx->session, conctx->ctx->server_priority_beast);
}
}
#ifdef USE_SNI
if (success && NULL != server_name && NULL != conctx->ctx->sni_db && server_name->len > 0) {
conctx->sni_server_name = g_string_new_len(GSTR_LEN(server_name));
sni_job_cb(&conctx->sni_job);
return;
}
#else
UNUSED(server_name);
#endif
li_ssl_client_hello_stream_ready(conctx->client_hello_stream);
}
static gboolean mod_gnutls_con_new(liConnection *con, int fd) {
liEventLoop *loop = &con->wrk->loop;
liServer *srv = con->srv;
mod_context *ctx = con->srv_sock->data;
mod_connection_ctx *conctx;
gnutls_session_t session;
int r;
if (GNUTLS_E_SUCCESS != (r = gnutls_init(&session, GNUTLS_SERVER))) {
ERROR(srv, "gnutls_init (%s): %s",
gnutls_strerror_name(r), gnutls_strerror(r));
return FALSE;
}
mod_gnutls_context_acquire(ctx);
if (GNUTLS_E_SUCCESS != (r = gnutls_priority_set(session, ctx->server_priority))) {
ERROR(srv, "gnutls_priority_set (%s): %s",
gnutls_strerror_name(r), gnutls_strerror(r));
goto fail;
}
if (GNUTLS_E_SUCCESS != (r = gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, ctx->server_cert))) {
ERROR(srv, "gnutls_credentials_set (%s): %s",
gnutls_strerror_name(r), gnutls_strerror(r));
goto fail;
}
if (NULL != ctx->session_db) {
gnutls_db_set_ptr(session, ctx->session_db);
gnutls_db_set_remove_function(session, session_db_remove_cb);
gnutls_db_set_retrieve_function(session, session_db_retrieve_cb);
gnutls_db_set_store_function(session, session_db_store_cb);
}
#ifdef HAVE_SESSION_TICKET
if (GNUTLS_E_SUCCESS != (r = gnutls_session_ticket_enable_server(session, &ctx->ticket_key))) {
ERROR(srv, "gnutls_session_ticket_enable_server (%s): %s",
gnutls_strerror_name(r), gnutls_strerror(r));
goto fail;
}
#endif
#ifdef GNUTLS_ALPN_MAND
{
static const gnutls_datum_t proto_http1 = { (unsigned char*) CONST_STR_LEN("http/1.1") };
gnutls_alpn_set_protocols(session, &proto_http1, 1, 0);
}
#endif
conctx = g_slice_new0(mod_connection_ctx);
conctx->session = session;
conctx->sock_stream = li_iostream_new(con->wrk, fd, tcp_io_cb, conctx);
conctx->client_hello_stream = li_ssl_client_hello_stream(&con->wrk->loop, gnutls_client_hello_cb, conctx);
#ifdef USE_SNI
li_job_init(&conctx->sni_job, sni_job_cb);
conctx->sni_jobref = li_job_ref(&con->wrk->loop.jobqueue, &conctx->sni_job);
#endif
li_stream_connect(&conctx->sock_stream->stream_in, conctx->client_hello_stream);
conctx->tls_filter = li_gnutls_filter_new(srv, con->wrk, &filter_callbacks, conctx, conctx->session,
conctx->client_hello_stream, &conctx->sock_stream->stream_out);
conctx->con = con;
conctx->ctx = ctx;
con->con_sock.data = conctx;
con->con_sock.callbacks = &gnutls_tcp_cbs;
con->con_sock.raw_out = li_stream_plug_new(loop);
con->con_sock.raw_in = li_stream_plug_new(loop);
con->info.is_ssl = TRUE;
return TRUE;
fail:
gnutls_deinit(session);
mod_gnutls_context_release(ctx);
return FALSE;
}
static void mod_gnutls_sock_release(liServerSocket *srv_sock) {
mod_context *ctx = srv_sock->data;
if (!ctx) return;
mod_gnutls_context_release(ctx);
}
static void gnutls_setup_listen_cb(liServer *srv, int fd, gpointer data) {
mod_context *ctx = data;
liServerSocket *srv_sock;
UNUSED(data);
if (-1 == fd) {
mod_gnutls_context_release(ctx);
return;
}
srv_sock = li_server_listen(srv, fd);
srv_sock->data = ctx; /* transfer ownership, no refcount change */
srv_sock->new_cb = mod_gnutls_con_new;
srv_sock->release_cb = mod_gnutls_sock_release;
}
static gboolean gnutls_setup(liServer *srv, liPlugin* p, liValue *val, gpointer userdata) {
mod_context *ctx;
int r;
/* setup defaults */
gboolean have_listen_parameter = FALSE;
gboolean have_pemfile_parameter = FALSE;
gboolean have_protect_beast_parameter = FALSE;
gboolean have_session_db_size_parameter = FALSE;
const char
*priority = NULL, *dh_params_file = NULL
#ifdef USE_SNI
,*sni_backend = NULL, *sni_fallback_pemfile = NULL
#endif
;
gboolean
protect_against_beast = FALSE;
gint64 session_db_size = 256;
UNUSED(p); UNUSED(userdata);
val = li_value_get_single_argument(val);
if (NULL == (val = li_value_to_key_value_list(val))) {
ERROR(srv, "%s", "gnutls expects a hash/key-value list as parameter");
return FALSE;
}
LI_VALUE_FOREACH(entry, val)
liValue *entryKey = li_value_list_at(entry, 0);
liValue *entryValue = li_value_list_at(entry, 1);
GString *entryKeyStr;
if (LI_VALUE_STRING != li_value_type(entryKey)) {
ERROR(srv, "%s", "gnutls doesn't take default keys");
return FALSE;
}
entryKeyStr = entryKey->data.string; /* keys are either NONE or STRING */
if (g_str_equal(entryKeyStr->str, "listen")) {
if (LI_VALUE_STRING != li_value_type(entryValue)) {
ERROR(srv, "%s", "gnutls listen expects a string as parameter");
return FALSE;
}
have_listen_parameter = TRUE;
} else if (g_str_equal(entryKeyStr->str, "pemfile")) {
if (LI_VALUE_STRING != li_value_type(entryValue)) {
ERROR(srv, "%s", "gnutls pemfile expects a string as parameter");
return FALSE;
}
have_pemfile_parameter = TRUE;
} else if (g_str_equal(entryKeyStr->str, "dh-params")) {
if (LI_VALUE_STRING != li_value_type(entryValue)) {
ERROR(srv, "%s", "gnutls dh-params expects a string as parameter");
return FALSE;
}
if (NULL != dh_params_file) {
ERROR(srv, "gnutls unexpected duplicate parameter %s", entryKeyStr->str);
return FALSE;
}
dh_params_file = entryValue->data.string->str;
} else if (g_str_equal(entryKeyStr->str, "priority")) {
if (LI_VALUE_STRING != li_value_type(entryValue)) {
ERROR(srv, "%s", "gnutls priority expects a string as parameter");
return FALSE;
}
if (NULL != priority) {
ERROR(srv, "gnutls unexpected duplicate parameter %s", entryKeyStr->str);
return FALSE;
}
priority = entryValue->data.string->str;
} else if (g_str_equal(entryKeyStr->str, "protect-against-beast")) {
if (LI_VALUE_BOOLEAN != li_value_type(entryValue)) {
ERROR(srv, "%s", "gnutls protect-against-beast expects a boolean as parameter");
return FALSE;
}
if (have_protect_beast_parameter) {
ERROR(srv, "gnutls unexpected duplicate parameter %s", entryKeyStr->str);
return FALSE;
}
have_protect_beast_parameter = TRUE;
protect_against_beast = entryValue->data.boolean;
} else if (g_str_equal(entryKeyStr->str, "session-db-size")) {
if (LI_VALUE_NUMBER != li_value_type(entryValue)) {
ERROR(srv, "%s", "gnutls session-db-size expects an integer as parameter");
return FALSE;
}
if (have_session_db_size_parameter) {
ERROR(srv, "gnutls unexpected duplicate parameter %s", entryKeyStr->str);
return FALSE;
}
have_session_db_size_parameter = TRUE;
session_db_size = entryValue->data.number;
#ifdef USE_SNI
} else if (g_str_equal(entryKeyStr->str, "sni-backend")) {
if (LI_VALUE_STRING != li_value_type(entryValue)) {
ERROR(srv, "%s", "gnutls sni-backend expects a string as parameter");
return FALSE;
}
if (NULL != sni_backend) {
ERROR(srv, "gnutls unexpected duplicate parameter %s", entryKeyStr->str);
return FALSE;
}
sni_backend = entryValue->data.string->str;
} else if (g_str_equal(entryKeyStr->str, "sni-fallback-pemfile")) {
if (LI_VALUE_STRING != li_value_type(entryValue)) {
ERROR(srv, "%s", "gnutls sni-fallback-pemfile expects a string as parameter");
return FALSE;
}
if (NULL != sni_fallback_pemfile) {
ERROR(srv, "gnutls unexpected duplicate parameter %s", entryKeyStr->str);
return FALSE;
}
sni_fallback_pemfile = entryValue->data.string->str;
#else
} else if (g_str_equal(entryKeyStr->str, "sni-backend")) {
ERROR(srv, "%s", "mod_gnutls was build without SNI support, invalid option sni-backend");
return FALSE;
} else if (g_str_equal(entryKeyStr->str, "sni-fallback-pemfile")) {
ERROR(srv, "%s", "mod_gnutls was build without SNI support, invalid option gnutls sni-fallback-pemfile");
return FALSE;
#endif
} else {
ERROR(srv, "invalid parameter for gnutls: %s", entryKeyStr->str);
return FALSE;
}
LI_VALUE_END_FOREACH()
if (!have_listen_parameter) {
ERROR(srv, "%s", "gnutls needs a listen parameter");
return FALSE;
}
if (!have_pemfile_parameter) {
ERROR(srv, "%s", "gnutls needs a pemfile");
return FALSE;
}
if (!(ctx = mod_gnutls_context_new(srv))) return FALSE;
ctx->protect_against_beast = protect_against_beast;
#ifdef USE_SNI
if (NULL != sni_backend) {
liFetchDatabase *backend = li_server_get_fetch_database(srv, sni_backend);
if (NULL == backend) {
ERROR(srv, "gnutls: no fetch backend with name '%s' registered", sni_backend);
goto error_free_ctx;
}
ctx->sni_backend_db = backend;
mod_gnutls_context_acquire(ctx);
ctx->sni_db = li_fetch_database_new(&fetch_cert_callbacks, ctx, 64, 16);
}
if (NULL != sni_fallback_pemfile) {
if (GNUTLS_E_SUCCESS != (r = gnutls_certificate_allocate_credentials(&ctx->sni_fallback_cert))) {
ERROR(srv, "gnutls_certificate_allocate_credentials failed(%s): %s",
gnutls_strerror_name(r), gnutls_strerror(r));
goto error_free_ctx;
}
if (GNUTLS_E_SUCCESS != (r = gnutls_certificate_set_x509_key_file(ctx->sni_fallback_cert, sni_fallback_pemfile, sni_fallback_pemfile, GNUTLS_X509_FMT_PEM))) {
ERROR(srv, "gnutls_certificate_set_x509_key_file failed(certfile '%s', keyfile '%s', PEM) (%s): %s",
sni_fallback_pemfile, sni_fallback_pemfile,
gnutls_strerror_name(r), gnutls_strerror(r));
goto error_free_ctx;
}
}
#endif
LI_VALUE_FOREACH(entry, val)
liValue *entryKey = li_value_list_at(entry, 0);
liValue *entryValue = li_value_list_at(entry, 1);
GString *entryKeyStr;
if (LI_VALUE_STRING != li_value_type(entryKey)) continue;
entryKeyStr = entryKey->data.string; /* keys are either NONE or STRING */
if (g_str_equal(entryKeyStr->str, "pemfile")) {
const char *pemfile = entryValue->data.string->str;
if (GNUTLS_E_SUCCESS != (r = gnutls_certificate_set_x509_key_file(ctx->server_cert, pemfile, pemfile, GNUTLS_X509_FMT_PEM))) {
ERROR(srv, "gnutls_certificate_set_x509_key_file failed(certfile '%s', keyfile '%s', PEM) (%s): %s",
pemfile, pemfile,
gnutls_strerror_name(r), gnutls_strerror(r));
goto error_free_ctx;
}
}
LI_VALUE_END_FOREACH()
if