Replace deprecated TLS client functions

1 files changed, 33 insertions, 44 deletions

diff --git a/plugins/sslutils.c b/plugins/sslutils.c
index 666a0120..6bc0ba81 100644
--- a/plugins/sslutils.c
+++ b/plugins/sslutils.c
@@ -31,9 +31,8 @@
 #include "netutils.h"
 
 #ifdef HAVE_SSL
-static SSL_CTX *c=NULL;
+static SSL_CTX *ctx=NULL;
 static SSL *s=NULL;
-static int initialized=0;
 
 int np_net_ssl_init(int sd) {
         return np_net_ssl_init_with_hostname(sd, NULL);
@@ -48,24 +47,24 @@ int np_net_ssl_init_with_hostname_and_version(int sd, char *host_name, int versi
 }
 
 int np_net_ssl_init_with_hostname_version_and_cert(int sd, char *host_name, int version, char *cert, char *privkey) {
-        const SSL_METHOD *method = NULL;
         long options = 0;
 
+        if ((ctx = SSL_CTX_new(TLS_client_method())) == NULL) {
+                printf("%s\n", _("CRITICAL - Cannot create SSL context."));
+                return STATE_CRITICAL;
+        }
+
         switch (version) {
         case MP_SSLv2: /* SSLv2 protocol */
-#if defined(USE_GNUTLS) || defined(OPENSSL_NO_SSL2)
                 printf("%s\n", _("UNKNOWN - SSL protocol version 2 is not supported by your SSL library."));
                 return STATE_UNKNOWN;
-#else
-                method = SSLv2_client_method();
-                break;
-#endif
         case MP_SSLv3: /* SSLv3 protocol */
 #if defined(OPENSSL_NO_SSL3)
                 printf("%s\n", _("UNKNOWN - SSL protocol version 3 is not supported by your SSL library."));
                 return STATE_UNKNOWN;
 #else
-                method = SSLv3_client_method();
+                SSL_CTX_set_min_proto_version(ctx, SSL3_VERSION);
+                SSL_CTX_set_max_proto_version(ctx, SSL3_VERSION);
                 break;
 #endif
         case MP_TLSv1: /* TLSv1 protocol */
@@ -73,7 +72,8 @@ int np_net_ssl_init_with_hostname_version_and_cert(int sd, char *host_name, int
                 printf("%s\n", _("UNKNOWN - TLS protocol version 1 is not supported by your SSL library."));
                 return STATE_UNKNOWN;
 #else
-                method = TLSv1_client_method();
+                SSL_CTX_set_min_proto_version(ctx, TLS1_VERSION);
+                SSL_CTX_set_max_proto_version(ctx, TLS1_VERSION);
                 break;
 #endif
         case MP_TLSv1_1: /* TLSv1.1 protocol */
@@ -81,7 +81,8 @@ int np_net_ssl_init_with_hostname_version_and_cert(int sd, char *host_name, int
                 printf("%s\n", _("UNKNOWN - TLS protocol version 1.1 is not supported by your SSL library."));
                 return STATE_UNKNOWN;
 #else
-                method = TLSv1_1_client_method();
+                SSL_CTX_set_min_proto_version(ctx, TLS1_1_VERSION);
+                SSL_CTX_set_max_proto_version(ctx, TLS1_1_VERSION);
                 break;
 #endif
         case MP_TLSv1_2: /* TLSv1.2 protocol */
@@ -89,7 +90,8 @@ int np_net_ssl_init_with_hostname_version_and_cert(int sd, char *host_name, int
                 printf("%s\n", _("UNKNOWN - TLS protocol version 1.2 is not supported by your SSL library."));
                 return STATE_UNKNOWN;
 #else
-                method = TLSv1_2_client_method();
+                SSL_CTX_set_min_proto_version(ctx, TLS1_2_VERSION);
+                SSL_CTX_set_max_proto_version(ctx, TLS1_2_VERSION);
                 break;
 #endif
         case MP_TLSv1_2_OR_NEWER:
@@ -97,56 +99,43 @@ int np_net_ssl_init_with_hostname_version_and_cert(int sd, char *host_name, int
                 printf("%s\n", _("UNKNOWN - Disabling TLSv1.1 is not supported by your SSL library."));
                 return STATE_UNKNOWN;
 #else
-                options |= SSL_OP_NO_TLSv1_1;
+                SSL_CTX_set_min_proto_version(ctx, TLS1_2_VERSION);
+                break;
 #endif
-                /* FALLTHROUGH */
         case MP_TLSv1_1_OR_NEWER:
 #if !defined(SSL_OP_NO_TLSv1)
                 printf("%s\n", _("UNKNOWN - Disabling TLSv1 is not supported by your SSL library."));
                 return STATE_UNKNOWN;
 #else
-                options |= SSL_OP_NO_TLSv1;
+                SSL_CTX_set_min_proto_version(ctx, TLS1_1_VERSION);
+                break;
 #endif
-                /* FALLTHROUGH */
         case MP_TLSv1_OR_NEWER:
 #if defined(SSL_OP_NO_SSLv3)
-                options |= SSL_OP_NO_SSLv3;
+                SSL_CTX_set_min_proto_version(ctx, TLS1_VERSION);
+                break;
 #endif
-                /* FALLTHROUGH */
         case MP_SSLv3_OR_NEWER:
 #if defined(SSL_OP_NO_SSLv2)
-                options |= SSL_OP_NO_SSLv2;
+                SSL_CTX_set_min_proto_version(ctx, SSL3_VERSION);
+                break;
 #endif
-        case MP_SSLv2_OR_NEWER:
-                /* FALLTHROUGH */
-        default: /* Default to auto negotiation */
-                method = SSLv23_client_method();
-        }
-        if (!initialized) {
-                /* Initialize SSL context */
-                SSLeay_add_ssl_algorithms();
-                SSL_load_error_strings();
-                OpenSSL_add_all_algorithms();
-                initialized = 1;
-        }
-        if ((c = SSL_CTX_new(method)) == NULL) {
-                printf("%s\n", _("CRITICAL - Cannot create SSL context."));
-                return STATE_CRITICAL;
         }
+
         if (cert && privkey) {
 #ifdef USE_OPENSSL
-                if (!SSL_CTX_use_certificate_chain_file(c, cert)) {
+                if (!SSL_CTX_use_certificate_chain_file(ctx, cert)) {
 #elif  USE_GNUTLS
-                if (!SSL_CTX_use_certificate_file(c, cert, SSL_FILETYPE_PEM)) {
+                if (!SSL_CTX_use_certificate_file(ctx, cert, SSL_FILETYPE_PEM)) {
 #else
 #error Unported for unknown SSL library
 #endif
                         printf ("%s\n", _("CRITICAL - Unable to open certificate chain file!\n"));
                         return STATE_CRITICAL;
                 }
-                SSL_CTX_use_PrivateKey_file(c, privkey, SSL_FILETYPE_PEM);
+                SSL_CTX_use_PrivateKey_file(ctx, privkey, SSL_FILETYPE_PEM);
 #ifdef USE_OPENSSL
-                if (!SSL_CTX_check_private_key(c)) {
+                if (!SSL_CTX_check_private_key(ctx)) {
                         printf ("%s\n", _("CRITICAL - Private key does not seem to match certificate!\n"));
                         return STATE_CRITICAL;
                 }
@@ -155,9 +144,9 @@ int np_net_ssl_init_with_hostname_version_and_cert(int sd, char *host_name, int
 #ifdef SSL_OP_NO_TICKET
         options |= SSL_OP_NO_TICKET;
 #endif
-        SSL_CTX_set_options(c, options);
-        SSL_CTX_set_mode(c, SSL_MODE_AUTO_RETRY);
-        if ((s = SSL_new(c)) != NULL) {
+        SSL_CTX_set_options(ctx, options);
+        SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
+        if ((s = SSL_new(ctx)) != NULL) {
 #ifdef SSL_set_tlsext_host_name
                 if (host_name != NULL)
                         SSL_set_tlsext_host_name(s, host_name);
@@ -184,9 +173,9 @@ void np_net_ssl_cleanup() {
 #endif
                 SSL_shutdown(s);
                 SSL_free(s);
-                if (c) {
-                        SSL_CTX_free(c);
-                        c=NULL;
+                if (ctx) {
+                        SSL_CTX_free(ctx);
+                        ctx=NULL;
                 }
                 s=NULL;
         }