1 files changed, 739 insertions, 0 deletions

diff --git a/web/attachments/127924-check_smtp.c b/web/attachments/127924-check_smtp.c
new file mode 100644
index 0000000..f86a119
--- /dev/null
+++ b/web/attachments/127924-check_smtp.c
@@ -0,0 +1,739 @@
+/******************************************************************************
+
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ $Id: check_smtp.c,v 1.43 2005/01/01 16:15:39 tonvoon Exp $
+ 
+******************************************************************************/
+
+const char *progname = "check_smtp";
+const char *revision = "$Revision: 1.43 $";
+const char *copyright = "2000-2004";
+const char *email = "nagiosplug-devel@lists.sourceforge.net";
+
+#include "common.h"
+#include "netutils.h"
+#include "utils.h"
+
+#ifdef HAVE_SSL_H
+#  include <rsa.h>
+#  include <crypto.h>
+#  include <x509.h>
+#  include <pem.h>
+#  include <ssl.h>
+#  include <err.h>
+#else
+#  ifdef HAVE_OPENSSL_SSL_H
+#    include <openssl/rsa.h>
+#    include <openssl/crypto.h>
+#    include <openssl/x509.h>
+#    include <openssl/pem.h>
+#    include <openssl/ssl.h>
+#    include <openssl/err.h>
+#  endif
+#endif
+
+#ifdef HAVE_SSL
+
+int check_cert = FALSE;
+int days_till_exp;
+SSL_CTX *ctx;
+SSL *ssl;
+X509 *server_cert;
+int connect_STARTTLS (void);
+int check_certificate (X509 **);
+#endif
+
+enum {
+        SMTP_PORT       = 25
+};
+const char *SMTP_EXPECT = "220";
+const char *SMTP_HELO = "HELO ";
+const char *SMTP_QUIT   = "QUIT\r\n";
+const char *SMTP_STARTTLS = "STARTTLS\r\n";
+
+int process_arguments (int, char **);
+int validate_arguments (void);
+void print_help (void);
+void print_usage (void);
+int myrecv(void);
+int my_close(void);
+
+#ifdef HAVE_REGEX_H
+#include <regex.h>
+char regex_expect[MAX_INPUT_BUFFER] = "";
+regex_t preg;
+regmatch_t pmatch[10];
+char timestamp[10] = "";
+char errbuf[MAX_INPUT_BUFFER];
+int cflags = REG_EXTENDED | REG_NOSUB | REG_NEWLINE;
+int eflags = 0;
+int errcode, excode;
+#endif
+
+int server_port = SMTP_PORT;
+char *server_address = NULL;
+char *server_expect = NULL;
+int smtp_use_dummycmd = 0;
+char *mail_command = NULL;
+char *from_arg = NULL;
+int ncommands=0;
+int command_size=0;
+int nresponses=0;
+int response_size=0;
+char **commands = NULL;
+char **responses = NULL;
+int warning_time = 0;
+int check_warning_time = FALSE;
+int critical_time = 0;
+int check_critical_time = FALSE;
+int verbose = 0;
+int use_ssl = FALSE;
+int sd;
+char buffer[MAX_INPUT_BUFFER];
+enum {
+  TCP_PROTOCOL = 1,
+  UDP_PROTOCOL = 2,
+  MAXBUF = 1024
+};
+
+int
+main (int argc, char **argv)
+{
+
+        int n = 0;
+        double elapsed_time;
+        long microsec;
+        int result = STATE_UNKNOWN;
+        char *cmd_str = NULL;
+        char *helocmd = NULL;
+        struct timeval tv;
+
+        setlocale (LC_ALL, "");
+        bindtextdomain (PACKAGE, LOCALEDIR);
+        textdomain (PACKAGE);
+
+        if (process_arguments (argc, argv) == ERROR)
+                usage4 (_("Could not parse arguments"));
+
+        /* initialize the HELO command with the localhostname */
+#ifndef HOST_MAX_BYTES
+#define HOST_MAX_BYTES 255
+#endif
+        helocmd = malloc (HOST_MAX_BYTES);
+        gethostname(helocmd, HOST_MAX_BYTES);
+        asprintf (&helocmd, "%s%s%s", SMTP_HELO, helocmd, "\r\n");
+
+        /* initialize the MAIL command with optional FROM command  */
+        asprintf (&cmd_str, "%sFROM: %s%s", mail_command, from_arg, "\r\n");
+
+        if (verbose && smtp_use_dummycmd)
+                printf ("FROM CMD: %s", cmd_str);
+        
+        /* initialize alarm signal handling */
+        (void) signal (SIGALRM, socket_timeout_alarm_handler);
+
+        /* set socket timeout */
+        (void) alarm (socket_timeout);
+
+        /* start timer */
+        gettimeofday (&tv, NULL);
+
+        /* try to connect to the host at the given port number */
+        result = my_tcp_connect (server_address, server_port, &sd);
+
+        if (result == STATE_OK) { /* we connected */
+
+                /* watch for the SMTP connection string and */
+                /* return a WARNING status if we couldn't read any data */
+                if (recv (sd, buffer, MAX_INPUT_BUFFER - 1, 0) == -1) {
+                        printf (_("recv() failed\n"));
+                        result = STATE_WARNING;
+                }
+                else {
+                        if (verbose)
+                                printf ("%s", buffer);
+                        /* strip the buffer of carriage returns */
+                        strip (buffer);
+                        /* make sure we find the response we are looking for */
+                        if (!strstr (buffer, server_expect)) {
+                                if (server_port == SMTP_PORT)
+                                        printf (_("Invalid SMTP response received from host\n"));
+                                else
+                                        printf (_("Invalid SMTP response received from host on port %d\n"),
+                                                                        server_port);
+                                result = STATE_WARNING;
+                        }
+                }
+#ifdef HAVE_SSL
+                if(use_ssl) {
+                
+                  send(sd, helocmd, strlen(helocmd), 0);
+                  recv(sd,buffer, MAX_INPUT_BUFFER-1, 0); // wait for it
+                  /* send the STARTTLS command */
+                  send(sd, SMTP_STARTTLS, strlen(SMTP_STARTTLS), 0);
+
+                  recv(sd,buffer, MAX_INPUT_BUFFER-1, 0); // wait for it
+                  if (!strstr (buffer, server_expect)) {
+                    printf (_("Server does not support STARTTLS : %s \n"),buffer);
+                    return STATE_UNKNOWN;
+                  }
+                  if(connect_STARTTLS() != OK) {
+                    printf (_("CRITICAL - Cannot create SSL context.: %s \n"),buffer);
+                    return STATE_CRITICAL;
+                  }
+                  if ( check_cert ) {
+                    if ((server_cert = SSL_get_peer_certificate (ssl)) != NULL) {
+                      result = check_certificate (&server_cert);
+                      X509_free(server_cert);
+                    }
+                    else {
+                      printf (_("CRITICAL - Cannot retrieve server certificate.: %s \n"),buffer);
+                      result = STATE_CRITICAL;
+                              
+                    }
+                    my_close();
+                    return result;
+                  }
+                }
+#endif
+                /* send the HELO command */
+#ifdef HAVE_SSL
+                if (use_ssl)
+                  SSL_write(ssl, helocmd, strlen(helocmd));
+                else
+#endif
+                send(sd, helocmd, strlen(helocmd), 0);
+
+                /* allow for response to helo command to reach us */
+                myrecv();
+                                
+                /* sendmail will syslog a "NOQUEUE" error if session does not attempt
+                 * to do something useful. This can be prevented by giving a command
+                 * even if syntax is illegal (MAIL requires a FROM:<...> argument)
+                 *
+                 * According to rfc821 you can include a null reversepath in the from command
+                 * - but a log message is generated on the smtp server.
+                 *
+                 * You can disable sending mail_command with '--nocommand'
+                 * Use the -f option to provide a FROM address
+                 */
+                if (smtp_use_dummycmd) {
+#ifdef HAVE_SSL
+                  if (use_ssl)
+                    SSL_write(ssl, cmd_str, strlen(cmd_str));
+                  else
+#endif
+                  send(sd, cmd_str, strlen(cmd_str), 0);
+                  myrecv();
+                  if (verbose) 
+                    printf("%s", buffer);
+                }
+
+                while (n < ncommands) {
+                        asprintf (&cmd_str, "%s%s", commands[n], "\r\n");
+#ifdef HAVE_SSL
+                        if (use_ssl)
+                          SSL_write(ssl,cmd_str, strlen(cmd_str));
+                        else
+#endif
+                        send(sd, cmd_str, strlen(cmd_str), 0);
+                        myrecv();
+                        if (verbose) 
+                                printf("%s", buffer);
+                        strip (buffer);
+                        if (n < nresponses) {
+#ifdef HAVE_REGEX_H
+                                cflags |= REG_EXTENDED | REG_NOSUB | REG_NEWLINE;
+                                //strncpy (regex_expect, responses[n], sizeof (regex_expect) - 1);
+                                //regex_expect[sizeof (regex_expect) - 1] = '\0';
+                                errcode = regcomp (&preg, responses[n], cflags);
+                                if (errcode != 0) {
+                                        regerror (errcode, &preg, errbuf, MAX_INPUT_BUFFER);
+                                        printf (_("Could Not Compile Regular Expression"));
+                                        return ERROR;
+                                }
+                                excode = regexec (&preg, buffer, 10, pmatch, eflags);
+                                if (excode == 0) {
+                                        result = STATE_OK;
+                                }
+                                else if (excode == REG_NOMATCH) {
+                                        result = STATE_WARNING;
+                                        printf (_("SMTP %s - Invalid response '%s' to command '%s'\n"), state_text (result), buffer, commands[n]);
+                                }
+                                else {
+                                        regerror (excode, &preg, errbuf, MAX_INPUT_BUFFER);
+                                        printf (_("Execute Error: %s\n"), errbuf);
+                                        result = STATE_UNKNOWN;
+                                }
+#else
+                                if (strstr(buffer, responses[n])!=buffer) {
+                                        result = STATE_WARNING;
+                                        printf (_("SMTP %s - Invalid response '%s' to command '%s'\n"), state_text (result), buffer, commands[n]);
+                                }
+#endif
+                        }
+                        n++;
+                }
+
+                /* tell the server we're done */
+#ifdef HAVE_SSL
+                if (use_ssl)
+                  SSL_write(ssl,SMTP_QUIT, strlen (SMTP_QUIT));
+                else
+#endif
+                send (sd, SMTP_QUIT, strlen (SMTP_QUIT), 0);
+
+                /* finally close the connection */
+                close (sd);
+        }
+
+        /* reset the alarm */
+        alarm (0);
+
+        microsec = deltime (tv);
+        elapsed_time = (double)microsec / 1.0e6;
+
+        if (result == STATE_OK) {
+                if (check_critical_time && elapsed_time > (double) critical_time)
+                        result = STATE_CRITICAL;
+                else if (check_warning_time && elapsed_time > (double) warning_time)
+                        result = STATE_WARNING;
+        }
+
+        printf (_("SMTP %s - %.3f sec. response time%s%s|%s\n"),
+                state_text (result), elapsed_time,
+          verbose?", ":"", verbose?buffer:"",
+                fperfdata ("time", elapsed_time, "s",
+                          (int)check_warning_time, warning_time,
+                          (int)check_critical_time, critical_time,
+                          TRUE, 0, FALSE, 0));
+
+        return result;
+}
+
+
+
+/* process command-line arguments */
+int
+process_arguments (int argc, char **argv)
+{
+        int c;
+
+        int option = 0;
+        static struct option longopts[] = {
+                {"hostname", required_argument, 0, 'H'},
+                {"expect", required_argument, 0, 'e'},
+                {"critical", required_argument, 0, 'c'},
+                {"warning", required_argument, 0, 'w'},
+                {"timeout", required_argument, 0, 't'},
+                {"port", required_argument, 0, 'p'},
+                {"from", required_argument, 0, 'f'},
+                {"command", required_argument, 0, 'C'},
+                {"response", required_argument, 0, 'R'},
+                {"nocommand", required_argument, 0, 'n'},
+                {"verbose", no_argument, 0, 'v'},
+                {"version", no_argument, 0, 'V'},
+                {"use-ipv4", no_argument, 0, '4'},
+                {"use-ipv6", no_argument, 0, '6'},
+                {"help", no_argument, 0, 'h'},
+                {"starttls",no_argument,0,'S'},
+                {"certificate",required_argument,0,'D'},
+                {0, 0, 0, 0}
+        };
+
+        if (argc < 2)
+                return ERROR;
+
+        for (c = 1; c < argc; c++) {
+                if (strcmp ("-to", argv[c]) == 0)
+                        strcpy (argv[c], "-t");
+                else if (strcmp ("-wt", argv[c]) == 0)
+                        strcpy (argv[c], "-w");
+                else if (strcmp ("-ct", argv[c]) == 0)
+                        strcpy (argv[c], "-c");
+        }
+
+        while (1) {
+                c = getopt_long (argc, argv, "+hVv46t:p:f:e:c:w:H:C:R:SD:",
+                                 longopts, &option);
+
+                if (c == -1 || c == EOF)
+                        break;
+
+                switch (c) {
+                case 'H':                                                                       /* hostname */
+                        if (is_host (optarg)) {
+                                server_address = optarg;
+                        }
+                        else {
+                                usage2 (_("Invalid hostname/address"), optarg);
+                        }
+                        break;
+                case 'p':                                                                       /* port */
+                        if (is_intpos (optarg))
+                                server_port = atoi (optarg);
+                        else
+                                usage4 (_("Port must be a positive integer"));
+                        break;
+                case 'f':                                                                       /* from argument */
+                        from_arg = optarg;
+                        smtp_use_dummycmd = 1;
+                        break;
+                case 'e':                                                                       /* server expect string on 220  */
+                        server_expect = optarg;
+                        break;
+                case 'C':                                                                       /* commands  */
+                        if (ncommands >= command_size) {
+                                commands = realloc (commands, command_size+8);
+                                if (commands == NULL)
+                                        die (STATE_UNKNOWN,
+                                             _("Could not realloc() units [%d]\n"), ncommands);
+                        }
+                        commands[ncommands] = optarg;
+                        ncommands++;
+                        break;
+                case 'R':                                                                       /* server responses */
+                        if (nresponses >= response_size) {
+                                responses = realloc (responses, response_size+8);
+                                if (responses == NULL)
+                                        die (STATE_UNKNOWN,
+                                             _("Could not realloc() units [%d]\n"), nresponses);
+                        }
+                        responses[nresponses] = optarg;
+                        nresponses++;
+                        break;
+                case 'c':                                                                       /* critical time threshold */
+                        if (is_intnonneg (optarg)) {
+                                critical_time = atoi (optarg);
+                                check_critical_time = TRUE;
+                        }
+                        else {
+                                usage4 (_("Critical time must be a positive integer"));
+                        }
+                        break;
+                case 'w':                                                                       /* warning time threshold */
+                        if (is_intnonneg (optarg)) {
+                                warning_time = atoi (optarg);
+                                check_warning_time = TRUE;
+                        }
+                        else {
+                                usage4 (_("Warning time must be a positive integer"));
+                        }
+                        break;
+                case 'v':                                                                       /* verbose */
+                        verbose++;
+                        break;
+                case 't':                                                                       /* timeout */
+                        if (is_intnonneg (optarg)) {
+                                socket_timeout = atoi (optarg);
+                        }
+                        else {
+                                usage4 (_("Timeout interval must be a positive integer"));
+                        }
+                        break;
+                case 'S':
+                /* starttls */
+                        use_ssl = TRUE;
+                        break;
+                case 'D':
+                /* Check SSL cert validity */
+#ifdef HAVE_SSL
+                        if (!is_intnonneg (optarg))
+                                usage2 ("Invalid certificate expiration period",optarg);
+                                days_till_exp = atoi (optarg);
+                                check_cert = TRUE;
+#else
+                                usage (_("SSL support not available - install OpenSSL and recompile"));
+#endif
+                        break;
+                case '4':
+                        address_family = AF_INET;
+                        break;
+                case '6':
+#ifdef USE_IPV6
+                        address_family = AF_INET6;
+#else
+                        usage4 (_("IPv6 support not available"));
+#endif
+                        break;
+                case 'V':                                                                       /* version */
+                        print_revision (progname, revision);
+                        exit (STATE_OK);
+                case 'h':                                                                       /* help */
+                        print_help ();
+                        exit (STATE_OK);
+                case '?':                                                                       /* help */
+                        usage2 (_("Unknown argument"), optarg);
+                }
+        }
+
+        c = optind;
+        if (server_address == NULL) {
+                if (argv[c]) {
+                        if (is_host (argv[c]))
+                                server_address = argv[c];
+                        else
+                                usage2 (_("Invalid hostname/address"), argv[c]);
+                }
+                else {
+                        asprintf (&server_address, "127.0.0.1");
+                }
+        }
+
+        if (server_expect == NULL)
+                server_expect = strdup (SMTP_EXPECT);
+
+        if (mail_command == NULL)
+                mail_command = strdup("MAIL ");
+
+        if (from_arg==NULL)
+                from_arg = strdup(" ");
+
+        return validate_arguments ();
+}
+
+
+
+int
+validate_arguments (void)
+{
+        return OK;
+}
+
+
+
+void
+print_help (void)
+{
+        char *myport;
+        asprintf (&myport, "%d", SMTP_PORT);
+
+        print_revision (progname, revision);
+
+        printf ("Copyright (c) 1999-2001 Ethan Galstad <nagios@nagios.org>\n");
+        printf (COPYRIGHT, copyright, email);
+
+        printf(_("This plugin will attempt to open an SMTP connection with the host.\n\n"));
+
+        print_usage ();
+
+        printf (_(UT_HELP_VRSN));
+
+        printf (_(UT_HOST_PORT), 'p', myport);
+
+        printf (_(UT_IPv46));
+
+        printf (_("\
+ -e, --expect=STRING\n\
+   String to expect in first line of server response (default: '%s')\n\
+ -n, nocommand\n\
+   Suppress SMTP command\n\
+ -C, --command=STRING\n\
+   SMTP command (may be used repeatedly)\n\
+ -R, --command=STRING\n\
+   Expected response to command (may be used repeatedly)\n\
+ -f, --from=STRING\n\
+   FROM-address to include in MAIL command, required by Exchange 2000\n"),
+                SMTP_EXPECT);
+#ifdef HAVE_SSL
+        printf (_("\
+ -D, --certificate=INTEGER\n\
+    Minimum number of days a certificate has to be valid.\n\
+ -S, --starttls\n\
+    Use STARTTLS for the connection.\n"));
+#endif
+
+        printf (_(UT_WARN_CRIT));
+
+        printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
+
+        printf (_(UT_VERBOSE));
+
+        printf(_("\n\
+Successul connects return STATE_OK, refusals and timeouts return\n\
+STATE_CRITICAL, other errors return STATE_UNKNOWN.  Successful\n\
+connects, but incorrect reponse messages from the host result in\n\
+STATE_WARNING return values.\n"));
+
+        printf (_(UT_SUPPORT));
+}
+
+
+
+void
+print_usage (void)
+{
+        printf ("\
+Usage: %s -H host [-p port] [-e expect] [-C command] [-f from addr]\n\
+                  [-w warn] [-c crit] [-t timeout] [-S] [-D days] [-n] [-v] [-4|-6]\n", progname);
+}
+
+#ifdef HAVE_SSL
+int
+connect_STARTTLS (void)
+{
+  SSL_METHOD *meth;
+
+  /* Initialize SSL context */
+  SSLeay_add_ssl_algorithms ();
+  meth = SSLv2_client_method ();
+  SSL_load_error_strings ();
+  if ((ctx = SSL_CTX_new (meth)) == NULL)
+    {
+      printf(_("CRITICAL - Cannot create SSL context.\n"));
+      return STATE_CRITICAL;
+    }
+  /* do the SSL handshake */
+  if ((ssl = SSL_new (ctx)) != NULL)
+    {
+      SSL_set_fd (ssl, sd);
+      /* original version checked for -1
+         I look for success instead (1) */
+      if (SSL_connect (ssl) == 1)
+        return OK;
+      ERR_print_errors_fp (stderr);
+    }
+  else
+    {
+      printf (_("CRITICAL - Cannot initiate SSL handshake.\n"));
+    }
+  /* this causes a seg faul
+     not sure why, being sloppy
+     and commenting it out */
+  //  SSL_free (ssl);
+  SSL_CTX_free(ctx);
+  my_close();
+  
+  return STATE_CRITICAL;
+}
+
+int
+check_certificate (X509 ** certificate)
+{
+  ASN1_STRING *tm;
+  int offset;
+  struct tm stamp;
+  int days_left;
+
+  /* Retrieve timestamp of certificate */
+  tm = X509_get_notAfter (*certificate);
+  
+  /* Generate tm structure to process timestamp */
+  if (tm->type == V_ASN1_UTCTIME) {
+    if (tm->length < 10) {
+      printf (_("CRITICAL - Wrong time format in certificate.\n"));
+      return STATE_CRITICAL;
+    }
+    else {
+      stamp.tm_year = (tm->data[0] - '0') * 10 + (tm->data[1] - '0');
+      if (stamp.tm_year < 50)
+        stamp.tm_year += 100;
+      offset = 0;
+    }
+  }
+  else {
+    if (tm->length < 12) {
+      printf (_("CRITICAL - Wrong time format in certificate.\n"));
+      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 -= 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 = 0;
+  stamp.tm_isdst = -1;
+  
+  days_left = (mktime (&stamp) - time (NULL)) / 86400;
+  snprintf
+    (timestamp, 16, "%02d/%02d/%04d %02d:%02d",
+     stamp.tm_mon + 1,
+     stamp.tm_mday, stamp.tm_year + 1900, stamp.tm_hour, stamp.tm_min);
+  
+  if (days_left > 0 && days_left <= days_till_exp) {
+    printf ("Certificate expires in %d day(s) (%s).\n", days_left, timestamp);
+    return STATE_WARNING;
+  }
+  if (days_left < 0) {
+    printf ("Certificate expired on %s.\n", timestamp);
+    return STATE_CRITICAL;
+  }
+  
+  if (days_left == 0) {
+    printf ("Certificate expires today (%s).\n", timestamp);
+    return STATE_WARNING;
+  }
+  
+  printf ("Certificate will expire on %s.\n", timestamp);
+  
+  return STATE_OK;  
+}
+#endif
+
+int
+myrecv (void)
+{
+  int i;
+
+#ifdef HAVE_SSL
+  if (use_ssl) {
+    i = SSL_read (ssl, buffer, MAXBUF - 1);
+  }
+  else {
+#endif
+    i = read (sd, buffer, MAXBUF - 1);
+#ifdef HAVE_SSL
+  }
+#endif
+  return i;
+}
+
+int
+myrecv_norm (void)
+{
+  int i;
+  i = read (sd, buffer, MAXBUF - 1);
+  return i;
+}
+
+int 
+my_close (void)
+{
+#ifdef HAVE_SSL
+  if (use_ssl == TRUE) {
+    SSL_shutdown (ssl);
+    SSL_free (ssl);
+    SSL_CTX_free (ctx);
+    return 0;
+  }
+  else {
+#endif
+    return close(sd);
+#ifdef HAVE_SSL
+  }
+#endif
+}