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-rw-r--r--libnetdata/socket/security.c131
1 files changed, 86 insertions, 45 deletions
diff --git a/libnetdata/socket/security.c b/libnetdata/socket/security.c
index ab324a16..53366c4d 100644
--- a/libnetdata/socket/security.c
+++ b/libnetdata/socket/security.c
@@ -2,11 +2,13 @@
#ifdef ENABLE_HTTPS
-SSL_CTX *netdata_opentsdb_ctx=NULL;
+SSL_CTX *netdata_exporting_ctx=NULL;
SSL_CTX *netdata_client_ctx=NULL;
SSL_CTX *netdata_srv_ctx=NULL;
const char *security_key=NULL;
const char *security_cert=NULL;
+const char *tls_version=NULL;
+const char *tls_ciphers=NULL;
int netdata_validate_server = NETDATA_SSL_VALID_CERTIFICATE;
/**
@@ -32,14 +34,12 @@ static void security_info_callback(const SSL *ssl, int where, int ret __maybe_un
*/
void security_openssl_library()
{
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
-# if (SSLEAY_VERSION_NUMBER >= 0x0907000L)
+#if OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_110
+# if (SSLEAY_VERSION_NUMBER >= OPENSSL_VERSION_097)
OPENSSL_config(NULL);
# endif
-# if OPENSSL_API_COMPAT < 0x10100000L
SSL_load_error_strings();
-# endif
SSL_library_init();
#else
@@ -49,32 +49,64 @@ void security_openssl_library()
#endif
}
+#if OPENSSL_VERSION_NUMBER >= OPENSSL_VERSION_110
+/**
+ * TLS version
+ *
+ * Returns the TLS version depending of the user input.
+ *
+ * @param lversion is the user input.
+ *
+ * @return it returns the version number.
+ */
+int tls_select_version(const char *lversion) {
+ if (!strcmp(lversion, "1") || !strcmp(lversion, "1.0"))
+ return TLS1_VERSION;
+ else if (!strcmp(lversion, "1.1"))
+ return TLS1_1_VERSION;
+ else if (!strcmp(lversion, "1.2"))
+ return TLS1_2_VERSION;
+#if defined(TLS1_3_VERSION)
+ else if (!strcmp(lversion, "1.3"))
+ return TLS1_3_VERSION;
+#endif
+
+#if defined(TLS_MAX_VERSION)
+ return TLS_MAX_VERSION;
+#else
+ return TLS1_2_VERSION;
+#endif
+}
+#endif
+
/**
* OpenSSL common options
*
* Clients and SERVER have common options, this function is responsible to set them in the context.
*
- * @param ctx
+ * @param ctx the initialized SSL context.
+ * @param side 0 means server, and 1 client.
*/
-void security_openssl_common_options(SSL_CTX *ctx) {
-#if OPENSSL_VERSION_NUMBER >= 0x10100000L
- static char *ciphers = {"ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA"};
+void security_openssl_common_options(SSL_CTX *ctx, int side) {
+#if OPENSSL_VERSION_NUMBER >= OPENSSL_VERSION_110
+ if (!side) {
+ int version = tls_select_version(tls_version) ;
#endif
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
- SSL_CTX_set_options (ctx,SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_COMPRESSION);
+#if OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_110
+ SSL_CTX_set_options (ctx,SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_COMPRESSION);
#else
- SSL_CTX_set_min_proto_version(ctx, TLS1_2_VERSION);
- //We are avoiding the TLS v1.3 for while, because Google Chrome
- //is giving the message net::ERR_SSL_VERSION_INTERFERENCE with it.
- SSL_CTX_set_max_proto_version(ctx, TLS1_2_VERSION);
-#endif
- SSL_CTX_set_mode(ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
+ SSL_CTX_set_min_proto_version(ctx, TLS1_VERSION);
+ SSL_CTX_set_max_proto_version(ctx, version);
-#if OPENSSL_VERSION_NUMBER >= 0x10100000L
- if (!SSL_CTX_set_cipher_list(ctx, ciphers)) {
- error("SSL error. cannot set the cipher list");
+ if(tls_ciphers && strcmp(tls_ciphers, "none") != 0) {
+ if (!SSL_CTX_set_cipher_list(ctx, tls_ciphers)) {
+ error("SSL error. cannot set the cipher list");
+ }
+ }
}
#endif
+
+ SSL_CTX_set_mode(ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
}
/**
@@ -84,15 +116,26 @@ void security_openssl_common_options(SSL_CTX *ctx) {
*
* @return It returns the context on success or NULL otherwise
*/
-static SSL_CTX * security_initialize_openssl_client() {
+SSL_CTX * security_initialize_openssl_client() {
SSL_CTX *ctx;
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
+#if OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_110
ctx = SSL_CTX_new(SSLv23_client_method());
#else
ctx = SSL_CTX_new(TLS_client_method());
#endif
if(ctx) {
- security_openssl_common_options(ctx);
+#if OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_110
+ SSL_CTX_set_options (ctx,SSL_OP_NO_SSLv2|SSL_OP_NO_SSLv3|SSL_OP_NO_COMPRESSION);
+#else
+ SSL_CTX_set_min_proto_version(ctx, TLS1_VERSION);
+# if defined(TLS_MAX_VERSION)
+ SSL_CTX_set_max_proto_version(ctx, TLS_MAX_VERSION);
+# elif defined(TLS1_3_VERSION)
+ SSL_CTX_set_max_proto_version(ctx, TLS1_3_VERSION);
+# elif defined(TLS1_2_VERSION)
+ SSL_CTX_set_max_proto_version(ctx, TLS1_2_VERSION);
+# endif
+#endif
}
return ctx;
@@ -111,7 +154,7 @@ static SSL_CTX * security_initialize_openssl_server() {
static int netdata_id_context = 1;
//TO DO: Confirm the necessity to check return for other OPENSSL function
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
+#if OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_110
ctx = SSL_CTX_new(SSLv23_server_method());
if (!ctx) {
error("Cannot create a new SSL context, netdata won't encrypt communication");
@@ -128,7 +171,7 @@ static SSL_CTX * security_initialize_openssl_server() {
SSL_CTX_use_certificate_chain_file(ctx, security_cert);
#endif
- security_openssl_common_options(ctx);
+ security_openssl_common_options(ctx, 0);
SSL_CTX_use_PrivateKey_file(ctx,security_key,SSL_FILETYPE_PEM);
@@ -142,7 +185,7 @@ static SSL_CTX * security_initialize_openssl_server() {
SSL_CTX_set_session_id_context(ctx,(void*)&netdata_id_context,(unsigned int)sizeof(netdata_id_context));
SSL_CTX_set_info_callback(ctx,security_info_callback);
-#if (OPENSSL_VERSION_NUMBER < 0x00905100L)
+#if (OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_095)
SSL_CTX_set_verify_depth(ctx,1);
#endif
debug(D_WEB_CLIENT,"SSL GLOBAL CONTEXT STARTED\n");
@@ -158,7 +201,7 @@ static SSL_CTX * security_initialize_openssl_server() {
* @param selector informs the context that must be initialized, the following list has the valid values:
* NETDATA_SSL_CONTEXT_SERVER - the server context
* NETDATA_SSL_CONTEXT_STREAMING - Starts the streaming context.
- * NETDATA_SSL_CONTEXT_OPENTSDB - Starts the OpenTSDB contextv
+ * NETDATA_SSL_CONTEXT_EXPORTING - Starts the OpenTSDB contextv
*/
void security_start_ssl(int selector) {
switch (selector) {
@@ -179,8 +222,8 @@ void security_start_ssl(int selector) {
SSL_CTX_set_mode(netdata_client_ctx, SSL_MODE_ENABLE_PARTIAL_WRITE |SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER |SSL_MODE_AUTO_RETRY);
break;
}
- case NETDATA_SSL_CONTEXT_OPENTSDB: {
- netdata_opentsdb_ctx = security_initialize_openssl_client();
+ case NETDATA_SSL_CONTEXT_EXPORTING: {
+ netdata_exporting_ctx = security_initialize_openssl_client();
break;
}
}
@@ -191,23 +234,21 @@ void security_start_ssl(int selector) {
*
* Clean all the allocated contexts from netdata.
*/
-void security_clean_openssl() {
- if (netdata_srv_ctx)
- {
- SSL_CTX_free(netdata_srv_ctx);
- }
+void security_clean_openssl()
+{
+ if (netdata_srv_ctx) {
+ SSL_CTX_free(netdata_srv_ctx);
+ }
- if (netdata_client_ctx)
- {
+ if (netdata_client_ctx) {
SSL_CTX_free(netdata_client_ctx);
}
- if ( netdata_opentsdb_ctx )
- {
- SSL_CTX_free(netdata_opentsdb_ctx);
+ if (netdata_exporting_ctx) {
+ SSL_CTX_free(netdata_exporting_ctx);
}
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
+#if OPENSSL_VERSION_NUMBER < OPENSSL_VERSION_110
ERR_free_strings();
#endif
}
@@ -273,7 +314,7 @@ int security_process_accept(SSL *ssl,int msg) {
/**
* Test Certificate
*
- * Check the certificate of Netdata master
+ * Check the certificate of Netdata parent
*
* @param ssl is the connection structure
*
@@ -305,10 +346,10 @@ int security_test_certificate(SSL *ssl) {
* Location for context
*
* Case the user give us a directory with the certificates available and
- * the Netdata master certificate, we use this function to validate the certificate.
+ * the Netdata parent certificate, we use this function to validate the certificate.
*
* @param ctx the context where the path will be set.
- * @param file the file with Netdata master certificate.
+ * @param file the file with Netdata parent certificate.
* @param path the directory where the certificates are stored.
*
* @return It returns 0 on success and -1 otherwise.
@@ -316,7 +357,7 @@ int security_test_certificate(SSL *ssl) {
int security_location_for_context(SSL_CTX *ctx, char *file, char *path) {
struct stat statbuf;
if (stat(file, &statbuf)) {
- info("Netdata does not have a SSL master certificate, so it will use the default OpenSSL configuration to validate certificates!");
+ info("Netdata does not have the parent's SSL certificate, so it will use the default OpenSSL configuration to validate certificates!");
return 0;
}
@@ -336,7 +377,7 @@ int security_location_for_context(SSL_CTX *ctx, char *file, char *path) {
slfc:
while ((err = ERR_get_error()) != 0) {
ERR_error_string_n(err, buf, sizeof(buf));
- error("Cannot set the directory for the certificates and the master SSL certificate: %s",buf);
+ error("Cannot set the directory for the certificates and the parent SSL certificate: %s",buf);
}
return -1;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 23:56:02 +0000