Move SSL context code to get/set_ssl_context methods
- Move code setting up SSL context from accept_new() to new get/set_ssl_context() methods - set_ssl_context() will allow setting context only if not already set, or force re-setting context even if already present - set_ssl_context() will return 1 if SSL context has been set - if getting the new SSL context fails, set_ssl_context() will not break current SSL context This is preparatory work for reloading SSL certificates/key on BIP reload. Signed-off-by: Loïc Gomez <bip@animanova.fr>
This commit is contained in:
Loïc Gomez
parent
f797d25e06
commit
b33e47d0fc
GPG Key ID:
F80C2F71E89B990A
121
src/connection.c
121
src/connection.c
@ -34,6 +34,7 @@ extern char *conf_client_ciphers;
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extern char *conf_client_dh_file;
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static int SSLize(connection_t *cn, int *nc);
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static SSL_CTX *SSL_init_context(char *ciphers);
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SSL_CTX *get_ssl_context(void);
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/* SSH like trust management */
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int link_add_untrusted(void *ls, X509 *cert);
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#endif
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@ -1206,6 +1207,77 @@ static int ctx_set_dh(SSL_CTX *ctx)
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return 1;
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}
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int set_ssl_context(int force)
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{
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SSL_CTX *newctx = NULL;
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if (sslctx) {
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if (force == SSLCTX_FORCE_UPDATE) {
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mylog(LOG_DEBUG, "SSL context already set, forcing update");
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} else {
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mylog(LOG_DEBUG, "SSL context is already set, not updating");
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return 0;
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}
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} else {
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mylog(LOG_DEBUG, "Initializing SSL context for accepted connections");
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}
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newctx = get_ssl_context();
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if (!newctx) {
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mylog(LOG_ERROR, "Failed to get new SSL context");
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if (sslctx)
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mylog(LOG_WARN, "Keeping old SSL context");
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return 0;
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}
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sslctx = newctx;
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return 1;
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}
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SSL_CTX *get_ssl_context(void)
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{
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SSL_CTX *newctx = NULL;
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if (!(newctx = SSL_init_context(conf_client_ciphers))) {
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mylog(LOG_ERROR, "SSL context initialization failed");
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return NULL;
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}
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if (!conf_client_dh_file) {
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// try with a default path but don't fail if it doesn't exist
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conf_client_dh_file = default_path(conf_biphome, "dh.pem",
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"DH parameters");
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struct stat st_buf;
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if (stat(conf_client_dh_file, &st_buf) != 0) {
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free(conf_client_dh_file);
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conf_client_dh_file = NULL;
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}
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}
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if (conf_client_dh_file) {
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if (!ctx_set_dh(newctx)) {
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SSL_CTX_free(newctx);
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mylog(LOG_ERROR, "SSL Unable to load DH parameters");
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return NULL;
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}
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}
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mylog(LOG_DEBUG, "Loading SSL cert from %s", conf_ssl_certfile);
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if (!SSL_CTX_use_certificate_chain_file(newctx, conf_ssl_certfile)) {
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mylog(LOG_WARN, "SSL: Unable to load certificate file");
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SSL_CTX_free(newctx);
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return NULL;
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}
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mylog(LOG_DEBUG, "Loading SSL key from %s", conf_ssl_certfile);
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if (!SSL_CTX_use_PrivateKey_file(newctx, conf_ssl_certfile,
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SSL_FILETYPE_PEM)) {
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mylog(LOG_WARN, "SSL: Unable to load key file");
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SSL_CTX_free(newctx);
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return NULL;
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}
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return newctx;
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}
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#endif
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connection_t *accept_new(connection_t *cn)
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@ -1241,52 +1313,11 @@ connection_t *accept_new(connection_t *cn)
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conn->client = 1;
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#ifdef HAVE_LIBSSL
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if (cn->ssl) {
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if (!sslctx)
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set_ssl_context(SSLCTX_NO_REPLACE);
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if (!sslctx) {
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mylog(LOG_DEBUG,
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"No SSL context available for "
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"accepted connections. "
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"Initializing...");
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if (!(sslctx = SSL_init_context(conf_client_ciphers))) {
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mylog(LOG_ERROR,
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"SSL context initialization "
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"failed");
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connection_free(conn);
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return NULL;
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}
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if (!conf_client_dh_file) {
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// try with a default path but don't fail if it
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// doesn't exist
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conf_client_dh_file =
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default_path(conf_biphome, "dh.pem",
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"DH parameters");
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struct stat st_buf;
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if (stat(conf_client_dh_file, &st_buf) != 0) {
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free(conf_client_dh_file);
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conf_client_dh_file = NULL;
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}
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}
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if (conf_client_dh_file) {
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if (!ctx_set_dh(sslctx)) {
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mylog(LOG_ERROR,
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"SSL Unable to load DH "
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"parameters");
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connection_free(conn);
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return NULL;
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}
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}
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if (!SSL_CTX_use_certificate_chain_file(
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sslctx, conf_ssl_certfile))
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mylog(LOG_WARN,
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"SSL: Unable to load "
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"certificate file");
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if (!SSL_CTX_use_PrivateKey_file(sslctx,
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conf_ssl_certfile,
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SSL_FILETYPE_PEM))
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mylog(LOG_WARN, "SSL: Unable to load key file");
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connection_free(conn);
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return NULL;
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}
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conn->ssl_h = SSL_new(sslctx);
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@ -60,6 +60,9 @@
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#define SSL_CHECK_NONE (0)
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#define SSL_CHECK_BASIC (1)
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#define SSL_CHECK_CA (2)
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#define SSLCTX_NO_REPLACE 0
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#define SSLCTX_FORCE_UPDATE 1
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#endif
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struct connecting_data;
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@ -113,4 +116,9 @@ uint16_t connection_localport(connection_t *cn);
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uint16_t connection_remoteport(connection_t *cn);
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char *connection_localip(connection_t *cn);
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char *connection_remoteip(connection_t *cn);
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#ifdef HAVE_LIBSSL
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/* Set SSL context, force update if already set and force is 1
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* Return 1 if SSL context has been set */
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int set_ssl_context(int force);
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#endif
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#endif
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