1 files changed, 106 insertions, 122 deletions

diff --git a/plugins/sslutils.c b/plugins/sslutils.c
index 6bc0ba8..3c92841 100644
--- a/plugins/sslutils.c
+++ b/plugins/sslutils.c
@@ -1,46 +1,42 @@
 /*****************************************************************************
-*
-* Monitoring Plugins SSL utilities
-*
-* License: GPL
-* Copyright (c) 2005-2010 Monitoring Plugins Development Team
-*
-* Description:
-*
-* This file contains common functions for plugins that require SSL.
-*
-*
-* This program is free software: you can redistribute it and/or modify
-* it under the terms of the GNU General Public License as published by
-* the Free Software Foundation, either version 3 of the License, or
-* (at your option) any later version.
-*
-* This program is distributed in the hope that it will be useful,
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-* GNU General Public License for more details.
-*
-* You should have received a copy of the GNU General Public License
-* along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*
-*
-*****************************************************************************/
+ *
+ * Monitoring Plugins SSL utilities
+ *
+ * License: GPL
+ * Copyright (c) 2005-2024 Monitoring Plugins Development Team
+ *
+ * Description:
+ *
+ * This file contains common functions for plugins that require SSL.
+ *
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ *****************************************************************************/
 
 #define MAX_CN_LENGTH 256
 #include "common.h"
 #include "netutils.h"
 
 #ifdef HAVE_SSL
-static SSL_CTX *ctx=NULL;
-static SSL *s=NULL;
+static SSL_CTX *ctx = NULL;
+static SSL *s = NULL;
 
-int np_net_ssl_init(int sd) {
-        return np_net_ssl_init_with_hostname(sd, NULL);
-}
+int np_net_ssl_init(int sd) { return np_net_ssl_init_with_hostname(sd, NULL); }
 
-int np_net_ssl_init_with_hostname(int sd, char *host_name) {
-        return np_net_ssl_init_with_hostname_and_version(sd, host_name, 0);
-}
+int np_net_ssl_init_with_hostname(int sd, char *host_name) { return np_net_ssl_init_with_hostname_and_version(sd, host_name, 0); }
 
 int np_net_ssl_init_with_hostname_and_version(int sd, char *host_name, int version) {
         return np_net_ssl_init_with_hostname_version_and_cert(sd, host_name, version, NULL, NULL);
@@ -59,145 +55,141 @@ int np_net_ssl_init_with_hostname_version_and_cert(int sd, char *host_name, int
                 printf("%s\n", _("UNKNOWN - SSL protocol version 2 is not supported by your SSL library."));
                 return STATE_UNKNOWN;
         case MP_SSLv3: /* SSLv3 protocol */
-#if defined(OPENSSL_NO_SSL3)
+#       if defined(OPENSSL_NO_SSL3)
                 printf("%s\n", _("UNKNOWN - SSL protocol version 3 is not supported by your SSL library."));
                 return STATE_UNKNOWN;
-#else
+#       else
                 SSL_CTX_set_min_proto_version(ctx, SSL3_VERSION);
                 SSL_CTX_set_max_proto_version(ctx, SSL3_VERSION);
                 break;
-#endif
+#       endif
         case MP_TLSv1: /* TLSv1 protocol */
-#if defined(OPENSSL_NO_TLS1)
+#       if defined(OPENSSL_NO_TLS1)
                 printf("%s\n", _("UNKNOWN - TLS protocol version 1 is not supported by your SSL library."));
                 return STATE_UNKNOWN;
-#else
+#       else
                 SSL_CTX_set_min_proto_version(ctx, TLS1_VERSION);
                 SSL_CTX_set_max_proto_version(ctx, TLS1_VERSION);
                 break;
-#endif
+#       endif
         case MP_TLSv1_1: /* TLSv1.1 protocol */
-#if !defined(SSL_OP_NO_TLSv1_1)
+#       if !defined(SSL_OP_NO_TLSv1_1)
                 printf("%s\n", _("UNKNOWN - TLS protocol version 1.1 is not supported by your SSL library."));
                 return STATE_UNKNOWN;
-#else
+#       else
                 SSL_CTX_set_min_proto_version(ctx, TLS1_1_VERSION);
                 SSL_CTX_set_max_proto_version(ctx, TLS1_1_VERSION);
                 break;
-#endif
+#       endif
         case MP_TLSv1_2: /* TLSv1.2 protocol */
-#if !defined(SSL_OP_NO_TLSv1_2)
+#       if !defined(SSL_OP_NO_TLSv1_2)
                 printf("%s\n", _("UNKNOWN - TLS protocol version 1.2 is not supported by your SSL library."));
                 return STATE_UNKNOWN;
-#else
+#       else
                 SSL_CTX_set_min_proto_version(ctx, TLS1_2_VERSION);
                 SSL_CTX_set_max_proto_version(ctx, TLS1_2_VERSION);
                 break;
-#endif
+#       endif
         case MP_TLSv1_2_OR_NEWER:
-#if !defined(SSL_OP_NO_TLSv1_1)
+#       if !defined(SSL_OP_NO_TLSv1_1)
                 printf("%s\n", _("UNKNOWN - Disabling TLSv1.1 is not supported by your SSL library."));
                 return STATE_UNKNOWN;
-#else
+#       else
                 SSL_CTX_set_min_proto_version(ctx, TLS1_2_VERSION);
                 break;
-#endif
+#       endif
         case MP_TLSv1_1_OR_NEWER:
-#if !defined(SSL_OP_NO_TLSv1)
+#       if !defined(SSL_OP_NO_TLSv1)
                 printf("%s\n", _("UNKNOWN - Disabling TLSv1 is not supported by your SSL library."));
                 return STATE_UNKNOWN;
-#else
+#       else
                 SSL_CTX_set_min_proto_version(ctx, TLS1_1_VERSION);
                 break;
-#endif
+#       endif
         case MP_TLSv1_OR_NEWER:
-#if defined(SSL_OP_NO_SSLv3)
+#       if defined(SSL_OP_NO_SSLv3)
                 SSL_CTX_set_min_proto_version(ctx, TLS1_VERSION);
                 break;
-#endif
+#       endif
         case MP_SSLv3_OR_NEWER:
-#if defined(SSL_OP_NO_SSLv2)
+#       if defined(SSL_OP_NO_SSLv2)
                 SSL_CTX_set_min_proto_version(ctx, SSL3_VERSION);
                 break;
-#endif
+#       endif
         }
 
         if (cert && privkey) {
-#ifdef USE_OPENSSL
+#       ifdef USE_OPENSSL
                 if (!SSL_CTX_use_certificate_chain_file(ctx, cert)) {
-#elif  USE_GNUTLS
+#       elif USE_GNUTLS
                 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"));
+#       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(ctx, privkey, SSL_FILETYPE_PEM);
-#ifdef USE_OPENSSL
+#       ifdef USE_OPENSSL
                 if (!SSL_CTX_check_private_key(ctx)) {
-                        printf ("%s\n", _("CRITICAL - Private key does not seem to match certificate!\n"));
+                        printf("%s\n", _("CRITICAL - Private key does not seem to match certificate!\n"));
                         return STATE_CRITICAL;
                 }
-#endif
+#       endif
         }
-#ifdef SSL_OP_NO_TICKET
+#       ifdef SSL_OP_NO_TICKET
         options |= SSL_OP_NO_TICKET;
-#endif
+#       endif
         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
+#       ifdef SSL_set_tlsext_host_name
                 if (host_name != NULL)
                         SSL_set_tlsext_host_name(s, host_name);
-#endif
+#       endif
                 SSL_set_fd(s, sd);
                 if (SSL_connect(s) == 1) {
                         return OK;
                 } else {
                         printf("%s\n", _("CRITICAL - Cannot make SSL connection."));
-#  ifdef USE_OPENSSL /* XXX look into ERR_error_string */
+#       ifdef USE_OPENSSL /* XXX look into ERR_error_string */
                         ERR_print_errors_fp(stdout);
-#  endif /* USE_OPENSSL */
+#       endif /* USE_OPENSSL */
                 }
         } else {
-                        printf("%s\n", _("CRITICAL - Cannot initiate SSL handshake."));
+                printf("%s\n", _("CRITICAL - Cannot initiate SSL handshake."));
         }
         return STATE_CRITICAL;
 }
 
 void np_net_ssl_cleanup() {
         if (s) {
-#ifdef SSL_set_tlsext_host_name
+#       ifdef SSL_set_tlsext_host_name
                 SSL_set_tlsext_host_name(s, NULL);
-#endif
+#       endif
                 SSL_shutdown(s);
                 SSL_free(s);
                 if (ctx) {
                         SSL_CTX_free(ctx);
-                        ctx=NULL;
+                        ctx = NULL;
                 }
-                s=NULL;
+                s = NULL;
         }
 }
 
-int np_net_ssl_write(const void *buf, int num) {
-        return SSL_write(s, buf, num);
-}
+int np_net_ssl_write(const void *buf, int num) { return SSL_write(s, buf, num); }
 
-int np_net_ssl_read(void *buf, int num) {
-        return SSL_read(s, buf, num);
-}
+int np_net_ssl_read(void *buf, int num) { return SSL_read(s, buf, num); }
 
-int np_net_ssl_check_certificate(X509 *certificate, int days_till_exp_warn, int days_till_exp_crit){
-#  ifdef USE_OPENSSL
-        X509_NAME *subj=NULL;
+int np_net_ssl_check_certificate(X509 *certificate, int days_till_exp_warn, int days_till_exp_crit) {
+#       ifdef USE_OPENSSL
+        X509_NAME *subj = NULL;
         char timestamp[50] = "";
-        char cn[MAX_CN_LENGTH]= "";
+        char cn[MAX_CN_LENGTH] = "";
         char *tz;
 
-        int cnlen =-1;
-        int status=STATE_UNKNOWN;
+        int cnlen = -1;
+        int status = STATE_UNKNOWN;
 
         ASN1_STRING *tm;
         int offset;
@@ -208,15 +200,15 @@ int np_net_ssl_check_certificate(X509 *certificate, int days_till_exp_warn, int
         time_t tm_t;
 
         if (!certificate) {
-                printf("%s\n",_("CRITICAL - Cannot retrieve server certificate."));
+                printf("%s\n", _("CRITICAL - Cannot retrieve server certificate."));
                 return STATE_CRITICAL;
         }
 
         /* Extract CN from certificate subject */
-        subj=X509_get_subject_name(certificate);
+        subj = X509_get_subject_name(certificate);
 
         if (!subj) {
-                printf("%s\n",_("CRITICAL - Cannot retrieve certificate subject."));
+                printf("%s\n", _("CRITICAL - Cannot retrieve certificate subject."));
                 return STATE_CRITICAL;
         }
         cnlen = X509_NAME_get_text_by_NID(subj, NID_commonName, cn, sizeof(cn));
@@ -242,23 +234,16 @@ int np_net_ssl_check_certificate(X509 *certificate, int days_till_exp_warn, int
                         printf("%s\n", _("CRITICAL - Wrong time format in certificate."));
                         return STATE_CRITICAL;
                 } else {
-                        stamp.tm_year =
-                                (tm->data[0] - '0') * 1000 + (tm->data[1] - '0') * 100 +
-                                (tm->data[2] - '0') * 10 + (tm->data[3] - '0');
+                        stamp.tm_year = (tm->data[0] - '0') * 1000 + (tm->data[1] - '0') * 100 + (tm->data[2] - '0') * 10 + (tm->data[3] - '0');
                         stamp.tm_year -= 1900;
                         offset = 2;
                 }
         }
-        stamp.tm_mon =
-                (tm->data[2 + offset] - '0') * 10 + (tm->data[3 + offset] - '0') - 1;
-        stamp.tm_mday =
-                (tm->data[4 + offset] - '0') * 10 + (tm->data[5 + offset] - '0');
-        stamp.tm_hour =
-                (tm->data[6 + offset] - '0') * 10 + (tm->data[7 + offset] - '0');
-        stamp.tm_min =
-                (tm->data[8 + offset] - '0') * 10 + (tm->data[9 + offset] - '0');
-        stamp.tm_sec =
-                (tm->data[10 + offset] - '0') * 10 + (tm->data[11 + offset] - '0');
+        stamp.tm_mon = (tm->data[2 + offset] - '0') * 10 + (tm->data[3 + offset] - '0') - 1;
+        stamp.tm_mday = (tm->data[4 + offset] - '0') * 10 + (tm->data[5 + offset] - '0');
+        stamp.tm_hour = (tm->data[6 + offset] - '0') * 10 + (tm->data[7 + offset] - '0');
+        stamp.tm_min = (tm->data[8 + offset] - '0') * 10 + (tm->data[9 + offset] - '0');
+        stamp.tm_sec = (tm->data[10 + offset] - '0') * 10 + (tm->data[11 + offset] - '0');
         stamp.tm_isdst = -1;
 
         tm_t = timegm(&stamp);
@@ -275,30 +260,30 @@ int np_net_ssl_check_certificate(X509 *certificate, int days_till_exp_warn, int
         tzset();
 
         if (days_left > 0 && days_left <= days_till_exp_warn) {
-                printf (_("%s - Certificate '%s' expires in %d day(s) (%s).\n"), (days_left>days_till_exp_crit)?"WARNING":"CRITICAL", cn, days_left, timestamp);
+                printf(_("%s - Certificate '%s' expires in %d day(s) (%s).\n"), (days_left > days_till_exp_crit) ? "WARNING" : "CRITICAL", cn,
+                           days_left, timestamp);
                 if (days_left > days_till_exp_crit)
                         status = STATE_WARNING;
                 else
                         status = STATE_CRITICAL;
         } else if (days_left == 0 && time_left > 0) {
                 if (time_left >= 3600)
-                        time_remaining = (int) time_left / 3600;
+                        time_remaining = (int)time_left / 3600;
                 else
-                        time_remaining = (int) time_left / 60;
+                        time_remaining = (int)time_left / 60;
 
-                printf (_("%s - Certificate '%s' expires in %u %s (%s)\n"),
-                        (days_left>days_till_exp_crit) ? "WARNING" : "CRITICAL", cn, time_remaining,
-                        time_left >= 3600 ? "hours" : "minutes", timestamp);
+                printf(_("%s - Certificate '%s' expires in %u %s (%s)\n"), (days_left > days_till_exp_crit) ? "WARNING" : "CRITICAL", cn,
+                           time_remaining, time_left >= 3600 ? "hours" : "minutes", timestamp);
 
-                if ( days_left > days_till_exp_crit)
+                if (days_left > days_till_exp_crit)
                         status = STATE_WARNING;
                 else
                         status = STATE_CRITICAL;
         } else if (time_left < 0) {
                 printf(_("CRITICAL - Certificate '%s' expired on %s.\n"), cn, timestamp);
-                status=STATE_CRITICAL;
+                status = STATE_CRITICAL;
         } else if (days_left == 0) {
-                printf (_("%s - Certificate '%s' just expired (%s).\n"), (days_left>days_till_exp_crit)?"WARNING":"CRITICAL", cn, timestamp);
+                printf(_("%s - Certificate '%s' just expired (%s).\n"), (days_left > days_till_exp_crit) ? "WARNING" : "CRITICAL", cn, timestamp);
                 if (days_left > days_till_exp_crit)
                         status = STATE_WARNING;
                 else
@@ -309,22 +294,21 @@ int np_net_ssl_check_certificate(X509 *certificate, int days_till_exp_warn, int
         }
         X509_free(certificate);
         return status;
-#  else /* ifndef USE_OPENSSL */
+#       else  /* ifndef USE_OPENSSL */
         printf("%s\n", _("WARNING - Plugin does not support checking certificates."));
         return STATE_WARNING;
-#  endif /* USE_OPENSSL */
+#       endif /* USE_OPENSSL */
 }
 
-int np_net_ssl_check_cert(int days_till_exp_warn, int days_till_exp_crit){
-#  ifdef USE_OPENSSL
+int np_net_ssl_check_cert(int days_till_exp_warn, int days_till_exp_crit) {
+#       ifdef USE_OPENSSL
         X509 *certificate = NULL;
-        certificate=SSL_get_peer_certificate(s);
-        return(np_net_ssl_check_certificate(certificate, days_till_exp_warn, days_till_exp_crit));
-#  else /* ifndef USE_OPENSSL */
+        certificate = SSL_get_peer_certificate(s);
+        return (np_net_ssl_check_certificate(certificate, days_till_exp_warn, days_till_exp_crit));
+#       else  /* ifndef USE_OPENSSL */
         printf("%s\n", _("WARNING - Plugin does not support checking certificates."));
         return STATE_WARNING;
-#  endif /* USE_OPENSSL */
+#       endif /* USE_OPENSSL */
 }
 
-
 #endif /* HAVE_SSL */