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-rw-r--r--plugins/sslutils.c143
1 files changed, 87 insertions, 56 deletions
diff --git a/plugins/sslutils.c b/plugins/sslutils.c
index 0bc61ed3..5425bb2c 100644
--- a/plugins/sslutils.c
+++ b/plugins/sslutils.c
@@ -36,66 +36,97 @@ static SSL_CTX *c=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);
+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) {
- if (!initialized) {
- /* Initialize SSL context */
- SSLeay_add_ssl_algorithms ();
- SSL_load_error_strings ();
- OpenSSL_add_all_algorithms ();
- initialized = 1;
- }
- if ((c = SSL_CTX_new (SSLv23_client_method ())) == NULL) {
- printf ("%s\n", _("CRITICAL - Cannot create SSL context."));
- return STATE_CRITICAL;
- }
- if ((s = SSL_new (c)) != 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_and_version(int sd, char *host_name, int version) {
+ const SSL_METHOD *method = NULL;
+
+ switch (version) {
+ case 0: /* Deafult to auto negotiation */
+ method = SSLv23_client_method();
+ break;
+ case 1: /* TLSv1 protocol */
+ method = TLSv1_client_method();
+ break;
+ case 2: /* SSLv2 protocol */
+#if defined(USE_GNUTLS) || defined(OPENSSL_NO_SSL2)
+ printf(("%s\n", _("CRITICAL - SSL protocol version 2 is not supported by your SSL library.")));
+ return STATE_CRITICAL;
+#else
+ method = SSLv2_client_method();
+#endif
+ break;
+ case 3: /* SSLv3 protocol */
+ method = SSLv3_client_method();
+ break;
+ default: /* Unsupported */
+ printf("%s\n", _("CRITICAL - Unsupported SSL protocol version."));
+ return STATE_CRITICAL;
+ }
+ 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;
+ }
+#ifdef SSL_OP_NO_TICKET
+ SSL_CTX_set_options(c, SSL_OP_NO_TICKET);
+#endif
+ if ((s = SSL_new(c)) != NULL) {
#ifdef SSL_set_tlsext_host_name
- if (host_name != NULL)
- SSL_set_tlsext_host_name(s, host_name);
+ if (host_name != NULL)
+ SSL_set_tlsext_host_name(s, host_name);
#endif
- SSL_set_fd (s, sd);
- if (SSL_connect(s) == 1){
- return OK;
- } else {
- printf ("%s\n", _("CRITICAL - Cannot make SSL connection "));
+ 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 */
- ERR_print_errors_fp (stdout);
+ ERR_print_errors_fp(stdout);
# endif /* USE_OPENSSL */
- }
- } else {
- printf ("%s\n", _("CRITICAL - Cannot initiate SSL handshake."));
}
- return STATE_CRITICAL;
+ } else {
+ printf("%s\n", _("CRITICAL - Cannot initiate SSL handshake."));
+ }
+ return STATE_CRITICAL;
}
-void np_net_ssl_cleanup (){
- if(s){
+void np_net_ssl_cleanup() {
+ if (s) {
#ifdef SSL_set_tlsext_host_name
- SSL_set_tlsext_host_name(s, NULL);
+ SSL_set_tlsext_host_name(s, NULL);
#endif
- SSL_shutdown (s);
- SSL_free (s);
- if(c) {
- SSL_CTX_free (c);
- c=NULL;
- }
- s=NULL;
+ SSL_shutdown(s);
+ SSL_free(s);
+ if (c) {
+ SSL_CTX_free(c);
+ c=NULL;
}
+ s=NULL;
+ }
}
-int np_net_ssl_write(const void *buf, int 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){
+int np_net_ssl_read(void *buf, int num) {
return SSL_read(s, buf, num);
}
-int np_net_ssl_check_cert(int days_till_exp){
+int np_net_ssl_check_cert(int days_till_exp) {
# ifdef USE_OPENSSL
X509 *certificate=NULL;
X509_NAME *subj=NULL;
@@ -111,29 +142,29 @@ int np_net_ssl_check_cert(int days_till_exp){
char timestamp[17] = "";
certificate=SSL_get_peer_certificate(s);
- if(! certificate){
- printf ("%s\n",_("CRITICAL - Cannot retrieve server certificate."));
+ if (!certificate) {
+ printf("%s\n",_("CRITICAL - Cannot retrieve server certificate."));
return STATE_CRITICAL;
}
/* Extract CN from certificate subject */
subj=X509_get_subject_name(certificate);
- if(! subj){
- printf ("%s\n",_("CRITICAL - Cannot retrieve certificate subject."));
+ if (!subj) {
+ printf("%s\n",_("CRITICAL - Cannot retrieve certificate subject."));
return STATE_CRITICAL;
}
- cnlen = X509_NAME_get_text_by_NID (subj, NID_commonName, cn, sizeof(cn));
- if ( cnlen == -1 )
- strcpy(cn , _("Unknown CN"));
+ cnlen = X509_NAME_get_text_by_NID(subj, NID_commonName, cn, sizeof(cn));
+ if (cnlen == -1)
+ strcpy(cn, _("Unknown CN"));
/* Retrieve timestamp of certificate */
- tm = X509_get_notAfter (certificate);
+ tm = X509_get_notAfter(certificate);
/* Generate tm structure to process timestamp */
if (tm->type == V_ASN1_UTCTIME) {
if (tm->length < 10) {
- printf ("%s\n", _("CRITICAL - Wrong time format in certificate."));
+ printf("%s\n", _("CRITICAL - Wrong time format in certificate."));
return STATE_CRITICAL;
} else {
stamp.tm_year = (tm->data[0] - '0') * 10 + (tm->data[1] - '0');
@@ -143,7 +174,7 @@ int np_net_ssl_check_cert(int days_till_exp){
}
} else {
if (tm->length < 12) {
- printf ("%s\n", _("CRITICAL - Wrong time format in certificate."));
+ printf("%s\n", _("CRITICAL - Wrong time format in certificate."));
return STATE_CRITICAL;
} else {
stamp.tm_year =
@@ -172,22 +203,22 @@ int np_net_ssl_check_cert(int days_till_exp){
stamp.tm_mday, stamp.tm_year + 1900, stamp.tm_hour, stamp.tm_min);
if (days_left > 0 && days_left <= days_till_exp) {
- printf (_("WARNING - Certificate '%s' expires in %d day(s) (%s).\n"), cn, days_left, timestamp);
+ printf(_("WARNING - Certificate '%s' expires in %d day(s) (%s).\n"), cn, days_left, timestamp);
status=STATE_WARNING;
} else if (time_left < 0) {
- printf (_("CRITICAL - Certificate '%s' expired on %s.\n"), cn, timestamp);
+ printf(_("CRITICAL - Certificate '%s' expired on %s.\n"), cn, timestamp);
status=STATE_CRITICAL;
} else if (days_left == 0) {
- printf (_("WARNING - Certificate '%s' expires today (%s).\n"), cn, timestamp);
+ printf(_("WARNING - Certificate '%s' expires today (%s).\n"), cn, timestamp);
status=STATE_WARNING;
} else {
- printf (_("OK - Certificate '%s' will expire on %s.\n"), cn, timestamp);
+ printf(_("OK - Certificate '%s' will expire on %s.\n"), cn, timestamp);
status=STATE_OK;
}
- X509_free (certificate);
+ X509_free(certificate);
return status;
# else /* ifndef USE_OPENSSL */
- printf ("%s\n", _("WARNING - Plugin does not support checking certificates."));
+ printf("%s\n", _("WARNING - Plugin does not support checking certificates."));
return STATE_WARNING;
# endif /* USE_OPENSSL */
}
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