1568 lines
60 KiB
C
1568 lines
60 KiB
C
/****************************************************************************
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*
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* Program: HTTP plugin for Nagios
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* License: GPL
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*
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* License Information:
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*****************************************************************************/
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/****************************************************************************
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*
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* check_http is derived from the original check_http provided by
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* Ethan Galstad/Karl DeBisschop
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*
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* This provides some additional functionality including:
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* - check server certificate against supplied hostname (Host: header) if any
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* - check server certificate against local CA certificates (as browsers do)
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* - authenticate with client certificate (and optional passphrase)
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* - specify HTTP returncodes to return a status of WARNING or OK instead of
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* CRITICAL (only global for 3xx or 4xx errors)
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* - check only against HTTP status line and exit immediately if not matched
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*
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*****************************************************************************/
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const char *progname = "check_http";
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#define REVISION "$Revision: 1117 $"
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#define CVSREVISION "1.24"
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#define COPYRIGHT "2003"
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#define AUTHORS "Fabian Pehla"
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#define EMAIL "fabian@pehla.de"
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#include "config.h"
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#include "common.h"
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#include "netutils.h"
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#include "utils.h"
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#define HELP_TXT_SUMMARY "\
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This plugin tests the HTTP service on the specified host. It can test\n\
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normal (http) and secure (https) servers, follow redirects, search for\n\
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strings and regular expressions, check connection times, and report on\n\
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certificate expiration times.\n"
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#define HELP_TXT_OPTIONS "\
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-H <virtual host> -I <ip address> [-p <port>] [-u <uri>]\n\
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[-w <warn time>] [-c <critical time>] [-t <timeout>]\n\
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[-S] [-C <days>] [-a <basic auth>] [-A <certificate file>]\n\
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[-Z <ca certificate file>] [-e <expect>] [-E <expect only>]\n\
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[-s <string>] [-r <regex>] [-R <regex case insensitive>]\n\
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[-f (ok|warn|critical|follow)] [-g (ok|warn|critical)]\n"
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#define HELP_TXT_LONGOPTIONS "\
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-H, --hostname=<virtual host>\n\
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FQDN host name argument for use in HTTP Host:-Header (virtual host)\n\
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If used together wich the -S option, the server certificate will\n\
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be checked against this hostname\n\
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-I, --ip-address=<address>\n\
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IP address or hostname for TCP connect (use IP to avoid DNS lookup)\n\
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-p, --port=<port>\n\
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Port number (default: %d)\n\
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-u, --url-path=<uri>\n\
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URL to request from host (default: %s)\n\
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-S, --ssl\n\
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Use SSL (default port: %d)\n\
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-C, --server-certificate-days=<days>\n\
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Minimum number of days a server certificate must be valid\n\
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No other check can be combined with this option\n\
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-a, --basic-auth=<username:password>\n\
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Colon separated username and password for basic authentication\n\
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-A, --client-certificate=<certificate file>\n\
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File containing X509 client certificate and key\n\
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-K, --passphrase=<passphrase>\n\
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Passphrase for the client certificate key\n\
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This option can only be used in combination with the -A option\n\
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-Z, --ca-certificate=<certificate file>\n\
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File containing certificates of trusted CAs\n\
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The server certificate will be checked against these CAs\n\
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-e, --http-expect=<expect string>\n\
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String to expect in HTTP response line (Default: %s)\n\
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-E, --http-expect-only=<expect only string>\n\
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String to expect in HTTP response line\n\
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No other checks are made, this either matches the response\n\
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or exits immediately\n\
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-s, --content-string=<string>\n\
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String to expect in content\n\
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-r, --content-ereg=<regex>\n\
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Regular expression to expect in content\n\
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-R, --content-eregi=<regex case insensitive>\n\
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Case insensitive regular expression to expect in content\n\
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-f, --onredirect=(ok|warning|critical|follow)\n\
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Follow a redirect (3xx) or return with a user defined state\n\
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Default: OK\n\
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-g, --onerror=(ok|warning|critical)\n\
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Status to return on a client error (4xx)\n\
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-m, --min=INTEGER\n\
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Minimum page size required (bytes)\n\
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-t, --timeout=<timeout>\n\
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Seconds before connection times out (default: %d)\n\
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-c, --critical=<critical time>\n\
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Response time to result in critical status (seconds)\n\
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-w, --warning=<warn time>\n\
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Response time to result in warning status (seconds)\n\
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-V, --version\n\
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Print version information\n\
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-v, --verbose\n\
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Show details for command-line debugging (do not use with nagios server)\n\
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-h, --help\n\
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Print detailed help screen\n"
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#define HTTP_PORT 80
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#define DEFAULT_HTTP_URL_PATH "/"
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#define DEFAULT_HTTP_EXPECT "HTTP/1."
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#define DEFAULT_HTTP_METHOD "GET"
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#define DEFAULT_HTTP_REDIRECT_STATE STATE_OK
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#define DEFAULT_HTTP_CLIENT_ERROR_STATE STATE_WARNING
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#define HTTP_TEMPLATE_REQUEST "%s%s %s HTTP/1.0\r\n"
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#define HTTP_TEMPLATE_HEADER_USERAGENT "%sUser-Agent: %s/%s (nagios-plugins %s)\r\n"
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#define HTTP_TEMPLATE_HEADER_HOST "%sHost: %s\r\n"
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#define HTTP_TEMPLATE_HEADER_AUTH "%sAuthorization: Basic %s\r\n"
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/* fill in printf with protocol_text(use_ssl), state_text(state), page->status, elapsed_time */
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#define RESULT_TEMPLATE_STATUS_RESPONSE_TIME "%s %s: %s - %7.3f seconds response time|time=%7.3f\n"
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#define RESULT_TEMPLATE_RESPONSE_TIME "%s %s: %7.3f seconds response time|time=%7.3f\n"
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#ifdef HAVE_SSL
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#ifdef HAVE_SSL_H
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#include <rsa.h>
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#include <crypto.h>
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#include <x509.h>
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#include <pem.h>
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#include <ssl.h>
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#include <err.h>
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#include <rand.h>
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#endif
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#ifdef HAVE_OPENSSL_SSL_H
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#include <openssl/rsa.h>
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#include <openssl/crypto.h>
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#include <openssl/x509.h>
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#include <openssl/pem.h>
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#include <openssl/rand.h>
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#endif
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#define HTTPS_PORT 443
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#endif
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#ifdef HAVE_REGEX_H
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#include <regex.h>
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#define REGEX_REGS 2
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#define MAX_REGEX_SIZE 256
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#endif
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#define chk_protocol(protocol) ( strstr( protocol, "https" ) ? TRUE : FALSE );
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#define protocol_std_port(use_ssl) ( use_ssl ? HTTPS_PORT : HTTP_PORT );
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#define protocol_text(use_ssl) ( use_ssl ? "HTTPS" : "HTTP" )
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#define MAX_IPV4_HOSTLENGTH 64
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#define HTTP_HEADER_LOCATION_MATCH "%*[Ll]%*[Oo]%*[Cc]%*[Aa]%*[Tt]%*[Ii]%*[Oo]%*[Nn]: "
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#define HTTP_HEADER_PROTOCOL_MATCH "%[HTPShtps]://"
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#define HTTP_HEADER_HOSTNAME_MATCH "%[a-zA-Z0-9.-]"
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#define HTTP_HEADER_PORT_MATCH ":%[0-9]"
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#define HTTP_HEADER_URL_PATH_MATCH "%[/a-zA-Z0-9._-=@,]"
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/*
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************************************************************************
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* GLOBAL VARIABLE/POINTER DEFINITIONS *
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************************************************************************
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*/
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/* misc variables */
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int verbose = FALSE;
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/* time thresholds to determine exit code */
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int use_warning_interval = FALSE;
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double warning_interval = 0;
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int use_critical_interval = FALSE;
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double critical_interval = 0;
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double elapsed_time = 0;
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struct timeval start_tv;
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/* variables concerning the server host */
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int use_server_hostname = FALSE;
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char *server_hostname = ""; // hostname for use in HTTPs Host: header
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char *server_host = ""; // hostname or ip address for tcp connect
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int use_server_port = FALSE;
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int server_port = HTTP_PORT;
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int use_basic_auth = FALSE;
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char basic_auth[MAX_INPUT_BUFFER] = "";
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/* variables concerning server responce */
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struct pageref {
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char *content;
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size_t size;
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char *status;
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char *header;
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char *body;
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};
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/* variables concerning ssl connections */
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int use_ssl = FALSE;
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#ifdef HAVE_SSL
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int server_certificate_min_days_valid = 0;
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int check_server_certificate = FALSE;
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X509 *server_certificate; // structure containing server certificate
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int use_client_certificate = FALSE;
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char *client_certificate_file = NULL;
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int use_client_certificate_passphrase = FALSE;
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char *client_certificate_passphrase = NULL;
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int use_ca_certificate = FALSE;
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char *ca_certificate_file = NULL;
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BIO *bio_err = 0; // error write context
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#endif
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/* variables concerning check behaviour */
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char *http_method = DEFAULT_HTTP_METHOD;
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char *http_url_path = "";
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int use_http_post_data = FALSE;
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char *http_post_data = "";
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int use_min_content_length = FALSE;
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int min_content_length = 0;
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int use_http_expect_only = FALSE;
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char http_expect[MAX_INPUT_BUFFER] = DEFAULT_HTTP_EXPECT;
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int check_content_string = FALSE;
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char content_string[MAX_INPUT_BUFFER] = "";
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int http_redirect_state = DEFAULT_HTTP_REDIRECT_STATE;
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int http_client_error_state = DEFAULT_HTTP_CLIENT_ERROR_STATE;
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#ifdef HAVE_REGEX_H
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regex_t regex_preg;
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regmatch_t regex_pmatch[REGEX_REGS];
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int check_content_regex = FALSE;
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char content_regex[MAX_REGEX_SIZE] = "";
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int regex_cflags = REG_NOSUB | REG_EXTENDED | REG_NEWLINE;
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int regex_error = 0;
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char regex_error_buffer[MAX_INPUT_BUFFER] = "";
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#endif
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/*
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************************************************************************
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* FUNCTION PROTOTYPES *
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************************************************************************
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*/
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void print_usage( void );
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void print_help( void );
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int process_arguments (int, char **);
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int http_request( int sock, struct pageref *page);
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int parse_http_response( struct pageref *page );
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int check_http_response( struct pageref *page );
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int check_http_content( struct pageref *page );
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int prepare_follow_redirect( struct pageref *page );
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static char *base64 (char *bin, int len);
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#ifdef HAVE_SSL
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int ssl_terminate( int state, char *string );
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static int passwd_cb( char *buf, int num, int rwflag, void *userdata );
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static void sigpipe_handle( int x );
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SSL_CTX * initialize_ssl_ctx( void );
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void destroy_ssl_ctx( SSL_CTX *ctx );
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int fetch_server_certificate( SSL *ssl );
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int check_server_certificate_chain( SSL *ssl );
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int check_server_certificate_hostname( void );
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int check_server_certificate_expires( void );
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int https_request( SSL_CTX *ctx, SSL *ssl, struct pageref *page );
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#endif
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/*
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************************************************************************
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* IMPLEMENTATION *
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************************************************************************
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*/
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/*
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* main()
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*
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* PSEUDOCODE OF HOW MAIN IS SUPPOSED TO WORK
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*
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* process command line arguments including sanity check
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* initialize alarm signal handling
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* if use_ssl
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* build ssl context
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* LOOP:
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* make tcp connection
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* if use_ssl
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* make ssl connection
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* if use_server_hostname
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* check if certificate matches hostname
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* if check_server_certificate
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* check expiration date of server certificate
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* return STATUS
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* else
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* request http page
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* handle ssl rehandshake
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* close ssl connection
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* else
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* request http page
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* close tcp connection
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* analyze http page
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* if follow on redirect
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* repeat LOOP
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* end of LOOP
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* destroy ssl context
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*/
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int
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main (int argc, char **argv)
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{
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int result = STATE_UNKNOWN;
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int sock;
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struct pageref page;
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#ifdef HAVE_SSL
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SSL_CTX *ctx;
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SSL *ssl;
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BIO *sbio;
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#endif
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if ( process_arguments(argc, argv) == ERROR )
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usage( "check_http: could not parse arguments\n" );
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#ifdef HAVE_SSL
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/* build SSL context if required:
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* a) either we use ssl from the beginning OR
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* b) or we follor redirects wich may lead os to a ssl page
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*/
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if ( use_ssl || ( http_redirect_state == STATE_DEPENDENT ) )
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ctx=initialize_ssl_ctx();
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#endif
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/* Loop around 3xx onredirect=follow */
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do {
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/*
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* initialize alarm signal handling, set socket timeout, start timer
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* socket_timeout and socket_timeout_alarm_handler are defined in
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* netutils.c
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*/
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(void) signal( SIGALRM, socket_timeout_alarm_handler );
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(void) alarm( socket_timeout );
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gettimeofday( &start_tv, NULL );
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/* make a tcp connection */
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result = my_tcp_connect( server_host, server_port, &sock );
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/* result of tcp connect */
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if ( result == STATE_OK )
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{
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#ifdef HAVE_SSL
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/* make a ssl connection */
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if ( use_ssl ) {
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ssl=SSL_new( ctx );
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sbio=BIO_new_socket( sock, BIO_NOCLOSE );
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SSL_set_bio( ssl, sbio, sbio);
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if ( SSL_connect( ssl ) <= 0 )
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ssl_terminate( STATE_CRITICAL, "check_http: SSL connect error" );
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/* fetch server certificate */
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result = fetch_server_certificate( ssl );
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/* verify server certificate against CAs */
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if ( ( result == STATE_OK ) && use_ca_certificate ) {
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result = check_server_certificate_chain( ssl );
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}
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/* check if certificate matches hostname */
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if ( ( result == STATE_OK ) && use_server_hostname ) {
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result = check_server_certificate_hostname();
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}
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if ( result == STATE_OK ) {
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/* check server certificate expire date */
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if ( check_server_certificate ) {
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result = check_server_certificate_expires();
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/* OR: perform http request */
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} else {
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result = https_request( ctx, ssl, (struct pageref *) &page );
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}
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}
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SSL_shutdown( ssl );
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SSL_free( ssl );
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} else {
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#endif
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/* HTTP implementation */
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result = http_request( sock, (struct pageref *) &page );
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#ifdef HAVE_SSL
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}
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#endif
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/* stop timer and calculate elapsed_time */
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elapsed_time = delta_time( start_tv );
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/* close the tcp connection */
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close( sock );
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/* reset the alarm */
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alarm( 0 );
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/* analyze http page */
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/* TO DO */
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if ( result == STATE_OK )
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result = parse_http_response( (struct pageref *) &page );
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if ( result == STATE_OK )
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result = check_http_response( (struct pageref *) &page );
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switch ( result ) {
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case STATE_OK:
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/* weiter geht's */
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result = check_http_content( (struct pageref *) &page );
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break;
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case STATE_DEPENDENT:
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/* try to determine redirect parameters */
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result = prepare_follow_redirect( (struct pageref *) &page );
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break;
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}
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} else {
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/* some error occured while trying to make a tcp connect */
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exit( result );
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}
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} while ( result == STATE_DEPENDENT ); // end of onredirect loop
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/* destroy SSL context */
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#ifdef HAVE_SSL
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if ( use_ssl || ( http_redirect_state == STATE_DEPENDENT ) )
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destroy_ssl_ctx( ctx );
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#endif
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/* if we ever get to this point, everything went fine */
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printf( RESULT_TEMPLATE_STATUS_RESPONSE_TIME,
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protocol_text( use_ssl ),
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state_text( result ),
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page.status,
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elapsed_time,
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elapsed_time );
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return result;
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}
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void
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print_help( void )
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{
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print_revision( progname, REVISION );
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printf
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( "Copyright (c) %s %s <%s>\n\n%s\n",
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COPYRIGHT, AUTHORS, EMAIL, HELP_TXT_SUMMARY );
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print_usage();
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printf( "NOTE: One or both of -H and -I must be specified\n" );
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printf( "\nOptions:\n" HELP_TXT_LONGOPTIONS "\n",
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HTTP_PORT, DEFAULT_HTTP_URL_PATH, HTTPS_PORT,
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DEFAULT_HTTP_EXPECT, DEFAULT_SOCKET_TIMEOUT );
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#ifdef HAVE_SSL
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//printf( SSLDESCRIPTION );
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#endif
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}
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void
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print_usage( void )
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{
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printf( "Usage:\n" " %s %s\n"
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#ifdef HAVE_GETOPT_H
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" %s (-h | --help) for detailed help\n"
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" %s (-V | --version) for version information\n",
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#else
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" %s -h for detailed help\n"
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" %s -V for version information\n",
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#endif
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progname, HELP_TXT_OPTIONS, progname, progname );
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}
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/*
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* process_arguments()
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*
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* process command line arguments either using getopt_long or getopt
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* (parsing long argumants manually)
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*/
|
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int
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process_arguments( int argc, char **argv )
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{
|
|
int c, i = 1;
|
|
extern char *optarg;
|
|
|
|
#ifdef HAVE_GETOPT_H
|
|
int option_index = 0;
|
|
static struct option long_options[] = {
|
|
STD_LONG_OPTS,
|
|
{"file", required_argument, 0, 'F'},
|
|
{"ip-address", required_argument, 0, 'I'},
|
|
{"port", required_argument, 0, 'p'},
|
|
{"url-path", required_argument, 0, 'u'},
|
|
{"post-data", required_argument, 0, 'P'},
|
|
{"ssl", no_argument, 0, 'S'},
|
|
{"server-certificate-days", required_argument, 0, 'C'},
|
|
{"basic-auth", required_argument, 0, 'a'},
|
|
{"client-certificate", required_argument, 0, 'A'},
|
|
{"passphrase", required_argument, 0, 'K'},
|
|
{"ca-certificate", required_argument, 0, 'Z'},
|
|
{"http-expect", required_argument, 0, 'e'},
|
|
{"http-expect-only", required_argument, 0, 'E'},
|
|
{"content-string", required_argument, 0, 's'},
|
|
{"content-ereg-linespan", required_argument, 0, 'l'},
|
|
{"content-ereg", required_argument, 0, 'r'},
|
|
{"content-eregi", required_argument, 0, 'R'},
|
|
{"onredirect", required_argument, 0, 'f'},
|
|
{"onerror", required_argument, 0, 'g'},
|
|
{"min", required_argument, 0, 'm'},
|
|
{0, 0, 0, 0}
|
|
};
|
|
#endif
|
|
|
|
|
|
/* convert commonly used arguments to their equivalent standard options */
|
|
for (c = 1; c < argc; c++) {
|
|
if ( strcmp( "-to", argv[c]) == 0 )
|
|
strcpy( argv[c], "-t" );
|
|
if ( strcmp( "-hn", argv[c]) == 0 )
|
|
strcpy( argv[c], "-H" );
|
|
if ( strcmp( "-wt", argv[c]) == 0 )
|
|
strcpy( argv[c], "-w" );
|
|
if ( strcmp( "-ct", argv[c]) == 0 )
|
|
strcpy( argv[c], "-c" );
|
|
}
|
|
|
|
#define OPTCHARS "Vvht:c:w:H:F:I:p:u:P:SC:a:A:K:Z:e:E:s:r:R:f:g:lm:"
|
|
|
|
|
|
while (1) {
|
|
|
|
#ifdef HAVE_GETOPT_H
|
|
c = getopt_long( argc, argv, OPTCHARS, long_options, &option_index );
|
|
#else
|
|
c = getopt( argc, argv, OPTCHARS );
|
|
#endif
|
|
|
|
if ( ( c == -1 ) || ( c == EOF ) ) {
|
|
break;
|
|
}
|
|
|
|
switch (c) {
|
|
case '?': /* usage */
|
|
usage2( "unknown argument", optarg );
|
|
break;
|
|
|
|
/* Standard options */
|
|
case 'h': /* help */
|
|
print_help();
|
|
exit( STATE_OK );
|
|
break;
|
|
case 'V': /* version */
|
|
print_revision( progname, REVISION );
|
|
exit( STATE_OK );
|
|
break;
|
|
case 'v': /* verbose */
|
|
verbose = TRUE;
|
|
break;
|
|
case 't': /* timeout period */
|
|
if ( !is_intnonneg( optarg ) )
|
|
usage2( "timeout interval must be a non-negative integer", optarg );
|
|
/* socket_timeout is defined in netutils.h and defaults to
|
|
* DEFAULT_SOCKET_TIMEOUT from common.h
|
|
*/
|
|
socket_timeout = atoi( optarg );
|
|
break;
|
|
case 'c': /* critical time threshold */
|
|
if ( !is_nonnegative( optarg ) )
|
|
usage2( "invalid critical threshold", optarg );
|
|
critical_interval = strtod( optarg, NULL );
|
|
use_critical_interval = TRUE;
|
|
break;
|
|
case 'w': /* warning time threshold */
|
|
if ( !is_nonnegative( optarg ) )
|
|
usage2( "invalid warning threshold", optarg );
|
|
warning_interval = strtod( optarg, NULL );
|
|
use_warning_interval = TRUE;
|
|
break;
|
|
case 'H': /* Host Name (virtual host) */
|
|
/* this rejects FQDNs, so we leave it for now...
|
|
*if ( !is_hostname( optarg ) )
|
|
* usage2( "invalid hostname", optarg );
|
|
*/
|
|
asprintf( &server_hostname, "%s", optarg );
|
|
use_server_hostname = TRUE;
|
|
break;
|
|
case 'F': /* File (dummy) */
|
|
break;
|
|
/* End of standard options */
|
|
|
|
|
|
case 'I': /* Server IP-address or Hostname */
|
|
/* this rejects FQDNs, so we leave it for now...
|
|
*if ( !is_host( optarg ) )
|
|
* usage2( "invalid ip address or hostname", optarg )
|
|
*/
|
|
asprintf( &server_host, "%s", optarg );
|
|
break;
|
|
case 'p': /* Server port */
|
|
if ( !is_intnonneg( optarg ) )
|
|
usage2( "invalid port number", optarg );
|
|
server_port = atoi( optarg );
|
|
use_server_port = TRUE;
|
|
break;
|
|
case 'S': /* use SSL */
|
|
#ifdef HAVE_SSL
|
|
use_ssl = TRUE;
|
|
if ( use_server_port == FALSE )
|
|
server_port = HTTPS_PORT;
|
|
#else
|
|
usage( "check_http: invalid option - SSL is not available\n" );
|
|
#endif
|
|
break;
|
|
case 'C': /* Server certificate warning time threshold */
|
|
#ifdef HAVE_SSL
|
|
if ( !is_intnonneg( optarg ) )
|
|
usage2( "invalid certificate expiration period", optarg );
|
|
server_certificate_min_days_valid = atoi( optarg );
|
|
check_server_certificate = TRUE;
|
|
#else
|
|
usage( "check_http: invalid option - SSL is not available\n" );
|
|
#endif
|
|
break;
|
|
case 'a': /* basic authorization info */
|
|
strncpy( basic_auth, optarg, MAX_INPUT_BUFFER - 1 );
|
|
basic_auth[MAX_INPUT_BUFFER - 1] = 0;
|
|
use_basic_auth = TRUE;
|
|
break;
|
|
case 'A': /* client certificate */
|
|
#ifdef HAVE_SSL
|
|
asprintf( &client_certificate_file, "%s", optarg );
|
|
use_client_certificate = TRUE;
|
|
#else
|
|
usage( "check_http: invalid option - SSL is not available\n" );
|
|
#endif
|
|
break;
|
|
case 'K': /* client certificate passphrase */
|
|
#ifdef HAVE_SSL
|
|
asprintf( &client_certificate_passphrase, "%s", optarg );
|
|
use_client_certificate_passphrase = TRUE;
|
|
#else
|
|
usage( "check_http: invalid option - SSL is not available\n" );
|
|
#endif
|
|
case 'Z': /* valid CA certificates */
|
|
#ifdef HAVE_SSL
|
|
asprintf( &ca_certificate_file, "%s", optarg );
|
|
use_ca_certificate = TRUE;
|
|
#else
|
|
usage( "check_http: invalid option - SSL is not available\n" );
|
|
#endif
|
|
break;
|
|
case 'u': /* URL PATH */
|
|
asprintf( &http_url_path, "%s", optarg );
|
|
break;
|
|
case 'P': /* POST DATA */
|
|
asprintf( &http_post_data, "%s", optarg );
|
|
use_http_post_data = TRUE;
|
|
asprintf( &http_method, "%s", "POST" );
|
|
break;
|
|
case 'e': /* expected string in first line of HTTP response */
|
|
strncpy( http_expect , optarg, MAX_INPUT_BUFFER - 1 );
|
|
http_expect[MAX_INPUT_BUFFER - 1] = 0;
|
|
break;
|
|
case 'E': /* expected string in first line of HTTP response and process no other check*/
|
|
strncpy( http_expect , optarg, MAX_INPUT_BUFFER - 1 );
|
|
http_expect[MAX_INPUT_BUFFER - 1] = 0;
|
|
use_http_expect_only = TRUE;
|
|
break;
|
|
case 's': /* expected (sub-)string in content */
|
|
strncpy( content_string , optarg, MAX_INPUT_BUFFER - 1 );
|
|
content_string[MAX_INPUT_BUFFER - 1] = 0;
|
|
check_content_string = TRUE;
|
|
break;
|
|
case 'l': /* regex linespan */
|
|
#ifdef HAVE_REGEX_H
|
|
regex_cflags &= ~REG_NEWLINE;
|
|
#else
|
|
usage( "check_http: call for regex which was not a compiled option\n" );
|
|
#endif
|
|
break;
|
|
case 'R': /* expected case insensitive regular expression in content */
|
|
#ifdef HAVE_REGEX_H
|
|
regex_cflags |= REG_ICASE;
|
|
#else
|
|
usage( "check_http: call for regex which was not a compiled option\n" );
|
|
#endif
|
|
case 'r': /* expected regular expression in content */
|
|
#ifdef HAVE_REGEX_H
|
|
strncpy( content_regex , optarg, MAX_REGEX_SIZE - 1 );
|
|
content_regex[MAX_REGEX_SIZE - 1] = 0;
|
|
check_content_regex = TRUE;
|
|
regex_error = regcomp( ®ex_preg, content_regex, regex_cflags );
|
|
if ( regex_error != 0 ) {
|
|
regerror( regex_error, ®ex_preg, regex_error_buffer, MAX_INPUT_BUFFER );
|
|
printf( "Could Not Compile Regular Expression: %s", regex_error_buffer );
|
|
return ERROR;
|
|
}
|
|
#else
|
|
usage( "check_http: call for regex which was not a compiled option\n" );
|
|
#endif
|
|
break;
|
|
case 'f': /* onredirect (3xx errors) */
|
|
if ( !strcmp( optarg, "follow" ) )
|
|
http_redirect_state = STATE_DEPENDENT;
|
|
if ( !strcmp( optarg, "unknown" ) )
|
|
http_redirect_state = STATE_UNKNOWN;
|
|
if ( !strcmp( optarg, "ok" ) )
|
|
http_redirect_state = STATE_OK;
|
|
if ( !strcmp( optarg, "warning" ) )
|
|
http_redirect_state = STATE_WARNING;
|
|
if ( !strcmp( optarg, "critical" ) )
|
|
http_redirect_state = STATE_CRITICAL;
|
|
break;
|
|
case 'g': /* onerror (4xx errors) */
|
|
if ( !strcmp( optarg, "unknown" ) )
|
|
http_client_error_state = STATE_UNKNOWN;
|
|
if ( !strcmp( optarg, "ok" ) )
|
|
http_client_error_state = STATE_OK;
|
|
if ( !strcmp( optarg, "warning" ) )
|
|
http_client_error_state = STATE_WARNING;
|
|
if ( !strcmp( optarg, "critical" ) )
|
|
http_client_error_state = STATE_CRITICAL;
|
|
break;
|
|
case 'm': /* min */
|
|
if ( !is_intnonneg( optarg ) )
|
|
usage2( "invalid page size", optarg );
|
|
min_content_length = atoi( optarg );
|
|
use_min_content_length = TRUE;
|
|
break;
|
|
} // end switch
|
|
} // end while(1)
|
|
|
|
c = optind;
|
|
|
|
|
|
/* Sanity checks on supplied command line arguments */
|
|
|
|
/* 1. if both host and hostname are not defined, try to
|
|
* fetch one more argument which is possibly supplied
|
|
* without an option
|
|
*/
|
|
if ( ( strcmp( server_host, "" ) ) && (c < argc) ) {
|
|
asprintf( &server_host, "%s", argv[c++] );
|
|
}
|
|
|
|
/* 2. check if another artument is supplied
|
|
*/
|
|
if ( ( strcmp( server_hostname, "" ) == 0 ) && (c < argc) ) {
|
|
asprintf( &server_hostname, "%s", argv[c++] );
|
|
}
|
|
|
|
/* 3. if host is still not defined, just copy hostname,
|
|
* which is then guaranteed to be defined by now
|
|
*/
|
|
if ( strcmp( server_host, "") == 0 ) {
|
|
if ( strcmp( server_hostname, "" ) == 0 ) {
|
|
usage ("check_http: you must specify a server address or host name\n");
|
|
} else {
|
|
asprintf( &server_host, "%s", server_hostname );
|
|
}
|
|
}
|
|
|
|
/* 4. check if content checks for a string and a regex
|
|
* are requested for only one of both is possible at
|
|
* a time
|
|
*/
|
|
if ( check_content_string && check_content_regex )
|
|
usage( "check_http: you can only check for string OR regex at a time\n" );
|
|
|
|
/* 5. check for options which require use_ssl */
|
|
if ( check_server_certificate && !use_ssl )
|
|
usage( "check_http: you must use -S to check server certificate\n" );
|
|
if ( use_client_certificate && !use_ssl )
|
|
usage( "check_http: you must use -S to authenticate with a client certificate\n" );
|
|
if ( use_ca_certificate && !use_ssl )
|
|
usage( "check_http: you must use -S to check server certificate against CA certificates\n" );
|
|
|
|
/* 6. check for passphrase without client certificate */
|
|
if ( use_client_certificate_passphrase && !use_client_certificate )
|
|
usage( "check_http: you must supply a client certificate to use a passphrase\n" );
|
|
|
|
|
|
/* Finally set some default values if necessary */
|
|
if ( strcmp( http_method, "" ) == 0 )
|
|
asprintf( &http_method, "%s", DEFAULT_HTTP_METHOD );
|
|
if ( strcmp( http_url_path, "" ) == 0 ) {
|
|
asprintf( &http_url_path, "%s", DEFAULT_HTTP_URL_PATH );
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
int
|
|
http_request( int sock, struct pageref *page )
|
|
{
|
|
char *buffer = "";
|
|
char recvbuff[MAX_INPUT_BUFFER] = "";
|
|
int buffer_len = 0;
|
|
int content_len = 0;
|
|
size_t sendsize = 0;
|
|
size_t recvsize = 0;
|
|
char *content = "";
|
|
size_t size = 0;
|
|
char *basic_auth_encoded = NULL;
|
|
|
|
asprintf( &buffer, HTTP_TEMPLATE_REQUEST, buffer, http_method, http_url_path );
|
|
|
|
asprintf( &buffer, HTTP_TEMPLATE_HEADER_USERAGENT, buffer, progname, REVISION, PACKAGE_VERSION );
|
|
|
|
if ( use_server_hostname ) {
|
|
asprintf( &buffer, HTTP_TEMPLATE_HEADER_HOST, buffer, server_hostname );
|
|
}
|
|
|
|
if ( use_basic_auth ) {
|
|
basic_auth_encoded = base64( basic_auth, strlen( basic_auth ) );
|
|
asprintf( &buffer, HTTP_TEMPLATE_HEADER_AUTH, buffer, basic_auth_encoded );
|
|
}
|
|
|
|
/* either send http POST data */
|
|
if ( use_http_post_data ) {
|
|
/* based on code written by Chris Henesy <lurker@shadowtech.org> */
|
|
asprintf( &buffer, "Content-Type: application/x-www-form-urlencoded\r\n" );
|
|
asprintf( &buffer, "Content-Length: %i\r\n\r\n", buffer, content_len );
|
|
asprintf( &buffer, "%s%s%s", buffer, http_post_data, "\r\n" );
|
|
sendsize = send( sock, buffer, strlen( buffer ), 0 );
|
|
if ( sendsize < strlen( buffer ) ) {
|
|
printf( "ERROR: Incomplete write\n" );
|
|
return STATE_CRITICAL;
|
|
}
|
|
/* or just a newline */
|
|
} else {
|
|
asprintf( &buffer, "%s%s", buffer, "\r\n" );
|
|
sendsize = send( sock, buffer, strlen( buffer ) , 0 );
|
|
if ( sendsize < strlen( buffer ) ) {
|
|
printf( "ERROR: Incomplete write\n" );
|
|
return STATE_CRITICAL;
|
|
}
|
|
}
|
|
|
|
|
|
/* read server's response */
|
|
|
|
do {
|
|
recvsize = recv( sock, recvbuff, MAX_INPUT_BUFFER - 1, 0 );
|
|
if ( recvsize > (size_t) 0 ) {
|
|
recvbuff[recvsize] = '\0';
|
|
asprintf( &content, "%s%s", content, recvbuff );
|
|
size += recvsize;
|
|
}
|
|
} while ( recvsize > (size_t) 0 );
|
|
|
|
asprintf( &page->content, "%s", content );
|
|
page->size = size;
|
|
|
|
/* return a CRITICAL status if we couldn't read any data */
|
|
if ( size == (size_t) 0)
|
|
ssl_terminate( STATE_CRITICAL, "No data received" );
|
|
|
|
return STATE_OK;
|
|
}
|
|
|
|
|
|
int
|
|
parse_http_response( struct pageref *page )
|
|
{
|
|
char *content = ""; //local copy of struct member
|
|
char *status = ""; //local copy of struct member
|
|
char *header = ""; //local copy of struct member
|
|
size_t len = 0; //temporary used
|
|
char *pos = ""; //temporary used
|
|
|
|
asprintf( &content, "%s", page->content );
|
|
|
|
/* find status line and null-terminate it */
|
|
// copy content to status
|
|
status = content;
|
|
|
|
// find end of status line and copy pointer to pos
|
|
content += (size_t) strcspn( content, "\r\n" );
|
|
pos = content;
|
|
|
|
// advance content pointer behind the newline of status line
|
|
content += (size_t) strspn( content, "\r\n" );
|
|
|
|
// null-terminate status line at pos
|
|
status[strcspn( status, "\r\n")] = 0;
|
|
strip( status );
|
|
|
|
// copy final status to struct member
|
|
page->status = status;
|
|
|
|
|
|
/* find header and null-terminate it */
|
|
// copy remaining content to header
|
|
header = content;
|
|
|
|
// loop until line containing only newline is found (end of header)
|
|
while ( strcspn( content, "\r\n" ) > 0 ) {
|
|
//find end of line and copy pointer to pos
|
|
content += (size_t) strcspn( content, "\r\n" );
|
|
pos = content;
|
|
|
|
if ( ( strspn( content, "\r" ) == 1 && strspn( content, "\r\n" ) >= 2 ) ||
|
|
( strspn( content, "\n" ) == 1 && strspn( content, "\r\n" ) >= 2 ) )
|
|
content += (size_t) 2;
|
|
else
|
|
content += (size_t) 1;
|
|
}
|
|
// advance content pointer behind the newline
|
|
content += (size_t) strspn( content, "\r\n" );
|
|
|
|
// null-terminate header at pos
|
|
header[pos - header] = 0;
|
|
|
|
// copy final header to struct member
|
|
page->header = header;
|
|
|
|
|
|
// copy remaining content to body
|
|
page->body = content;
|
|
|
|
if ( verbose ) {
|
|
printf( "STATUS: %s\n", page->status );
|
|
printf( "HEADER: \n%s\n", page->header );
|
|
printf( "BODY: \n%s\n", page->body );
|
|
}
|
|
|
|
return STATE_OK;
|
|
}
|
|
|
|
|
|
int
|
|
check_http_response( struct pageref *page )
|
|
{
|
|
char *msg = "";
|
|
|
|
/* check response time befor anything else */
|
|
if ( use_critical_interval && ( elapsed_time > critical_interval ) ) {
|
|
asprintf( &msg, RESULT_TEMPLATE_RESPONSE_TIME,
|
|
protocol_text( use_ssl ),
|
|
state_text( STATE_CRITICAL ),
|
|
elapsed_time,
|
|
elapsed_time );
|
|
terminate( STATE_CRITICAL, msg );
|
|
}
|
|
if ( use_warning_interval && ( elapsed_time > warning_interval ) ) {
|
|
asprintf( &msg, RESULT_TEMPLATE_RESPONSE_TIME,
|
|
protocol_text( use_ssl ),
|
|
state_text( STATE_WARNING ),
|
|
elapsed_time,
|
|
elapsed_time );
|
|
terminate( STATE_WARNING, msg );
|
|
}
|
|
|
|
|
|
/* make sure the status line matches the response we are looking for */
|
|
if ( strstr( page->status, http_expect ) ) {
|
|
/* The result is only checked against the expected HTTP status line,
|
|
so exit immediately after this check */
|
|
if ( use_http_expect_only ) {
|
|
if ( ( server_port == HTTP_PORT )
|
|
#ifdef HAVE_SSL
|
|
|| ( server_port == HTTPS_PORT ) )
|
|
#else
|
|
)
|
|
#endif
|
|
asprintf( &msg, "Expected HTTP response received from host\n" );
|
|
else
|
|
asprintf( &msg, "Expected HTTP response received from host on port %d\n", server_port );
|
|
terminate( STATE_OK, msg );
|
|
}
|
|
} else {
|
|
if ( ( server_port == HTTP_PORT )
|
|
#ifdef HAVE_SSL
|
|
|| ( server_port == HTTPS_PORT ) )
|
|
#else
|
|
)
|
|
#endif
|
|
asprintf( &msg, "Invalid HTTP response received from host\n" );
|
|
else
|
|
asprintf( &msg, "Invalid HTTP response received from host on port %d\n", server_port );
|
|
terminate( STATE_CRITICAL, msg );
|
|
}
|
|
|
|
/* check the return code */
|
|
/* server errors result in a critical state */
|
|
if ( strstr( page->status, "500" ) ||
|
|
strstr( page->status, "501" ) ||
|
|
strstr( page->status, "502" ) ||
|
|
strstr( page->status, "503" ) ||
|
|
strstr( page->status, "504" ) ||
|
|
strstr( page->status, "505" )) {
|
|
asprintf( &msg, RESULT_TEMPLATE_STATUS_RESPONSE_TIME,
|
|
protocol_text( use_ssl ),
|
|
state_text( http_client_error_state ),
|
|
page->status,
|
|
elapsed_time,
|
|
elapsed_time );
|
|
terminate( STATE_CRITICAL, msg );
|
|
}
|
|
|
|
/* client errors result in a warning state */
|
|
if ( strstr( page->status, "400" ) ||
|
|
strstr( page->status, "401" ) ||
|
|
strstr( page->status, "402" ) ||
|
|
strstr( page->status, "403" ) ||
|
|
strstr( page->status, "404" ) ||
|
|
strstr( page->status, "405" ) ||
|
|
strstr( page->status, "406" ) ||
|
|
strstr( page->status, "407" ) ||
|
|
strstr( page->status, "408" ) ||
|
|
strstr( page->status, "409" ) ||
|
|
strstr( page->status, "410" ) ||
|
|
strstr( page->status, "411" ) ||
|
|
strstr( page->status, "412" ) ||
|
|
strstr( page->status, "413" ) ||
|
|
strstr( page->status, "414" ) ||
|
|
strstr( page->status, "415" ) ||
|
|
strstr( page->status, "416" ) ||
|
|
strstr( page->status, "417" ) ) {
|
|
asprintf( &msg, RESULT_TEMPLATE_STATUS_RESPONSE_TIME,
|
|
protocol_text( use_ssl ),
|
|
state_text( http_client_error_state ),
|
|
page->status,
|
|
elapsed_time,
|
|
elapsed_time );
|
|
terminate( http_client_error_state, msg );
|
|
}
|
|
|
|
/* check redirected page if specified */
|
|
if (strstr( page->status, "300" ) ||
|
|
strstr( page->status, "301" ) ||
|
|
strstr( page->status, "302" ) ||
|
|
strstr( page->status, "303" ) ||
|
|
strstr( page->status, "304" ) ||
|
|
strstr( page->status, "305" ) ||
|
|
strstr( page->status, "306" ) ||
|
|
strstr( page->status, "307" ) ) {
|
|
if ( http_redirect_state == STATE_DEPENDENT ) {
|
|
/* returning STATE_DEPENDENT means follow redirect */
|
|
return STATE_DEPENDENT;
|
|
} else {
|
|
asprintf( &msg, RESULT_TEMPLATE_STATUS_RESPONSE_TIME,
|
|
protocol_text( use_ssl ),
|
|
state_text( http_redirect_state ),
|
|
page->status,
|
|
elapsed_time,
|
|
elapsed_time );
|
|
terminate( http_redirect_state, msg );
|
|
}
|
|
}
|
|
|
|
return STATE_OK;
|
|
}
|
|
|
|
int
|
|
check_http_content( struct pageref *page )
|
|
{
|
|
char *msg = "";
|
|
|
|
/* check for string in content */
|
|
if ( check_content_string ) {
|
|
if ( strstr( page->content, content_string ) ) {
|
|
asprintf( &msg, RESULT_TEMPLATE_STATUS_RESPONSE_TIME,
|
|
protocol_text( use_ssl ),
|
|
state_text( STATE_OK ),
|
|
page->status,
|
|
elapsed_time,
|
|
elapsed_time );
|
|
terminate( STATE_OK, msg );
|
|
} else {
|
|
asprintf( &msg, RESULT_TEMPLATE_STATUS_RESPONSE_TIME,
|
|
protocol_text( use_ssl ),
|
|
state_text( STATE_CRITICAL ),
|
|
page->status,
|
|
elapsed_time,
|
|
elapsed_time );
|
|
terminate( STATE_CRITICAL, msg );
|
|
}
|
|
}
|
|
|
|
#ifdef HAVE_REGEX_H
|
|
/* check for regex in content */
|
|
if ( check_content_regex ) {
|
|
regex_error = regexec( ®ex_preg, page->content, REGEX_REGS, regex_pmatch, 0);
|
|
if ( regex_error == 0 ) {
|
|
asprintf( &msg, RESULT_TEMPLATE_STATUS_RESPONSE_TIME,
|
|
protocol_text( use_ssl ),
|
|
state_text( STATE_OK ),
|
|
page->status,
|
|
elapsed_time,
|
|
elapsed_time );
|
|
terminate( STATE_OK, msg );
|
|
} else {
|
|
if ( regex_error == REG_NOMATCH ) {
|
|
asprintf( &msg, "%s, %s: regex pattern not found\n",
|
|
protocol_text( use_ssl) ,
|
|
state_text( STATE_CRITICAL ) );
|
|
terminate( STATE_CRITICAL, msg );
|
|
} else {
|
|
regerror( regex_error, ®ex_preg, regex_error_buffer, MAX_INPUT_BUFFER);
|
|
asprintf( &msg, "%s %s: Regex execute Error: %s\n",
|
|
protocol_text( use_ssl) ,
|
|
state_text( STATE_CRITICAL ),
|
|
regex_error_buffer );
|
|
terminate( STATE_CRITICAL, msg );
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return STATE_OK;
|
|
}
|
|
|
|
|
|
int
|
|
prepare_follow_redirect( struct pageref *page )
|
|
{
|
|
char *header = NULL;
|
|
char *msg = "";
|
|
char protocol[6];
|
|
char hostname[MAX_IPV4_HOSTLENGTH];
|
|
char port[6];
|
|
char *url_path = NULL;
|
|
char *orig_url_path = NULL;
|
|
char *orig_url_dirname = NULL;
|
|
size_t len = 0;
|
|
|
|
asprintf( &header, "%s", page->header );
|
|
|
|
|
|
/* restore some default values */
|
|
use_http_post_data = FALSE;
|
|
asprintf( &http_method, "%s", DEFAULT_HTTP_METHOD );
|
|
|
|
/* copy url of original request, maybe we need it to compose
|
|
absolute url from relative Location: header */
|
|
asprintf( &orig_url_path, "%s", http_url_path );
|
|
|
|
while ( strcspn( header, "\r\n" ) > (size_t) 0 ) {
|
|
url_path = realloc( url_path, (size_t) strcspn( header, "\r\n" ) );
|
|
if ( url_path == NULL )
|
|
terminate( STATE_UNKNOWN, "HTTP UNKNOWN: could not reallocate url_path" );
|
|
|
|
|
|
/* Try to find a Location header combination of METHOD HOSTNAME PORT and PATH */
|
|
/* 1. scan for Location: http[s]://hostname:port/path */
|
|
if ( sscanf ( header, HTTP_HEADER_LOCATION_MATCH HTTP_HEADER_PROTOCOL_MATCH HTTP_HEADER_HOSTNAME_MATCH HTTP_HEADER_PORT_MATCH HTTP_HEADER_URL_PATH_MATCH, &protocol, &hostname, &port, url_path ) == 4 ) {
|
|
asprintf( &server_hostname, "%s", hostname );
|
|
asprintf( &server_host, "%s", hostname );
|
|
use_ssl = chk_protocol(protocol);
|
|
server_port = atoi( port );
|
|
asprintf( &http_url_path, "%s", url_path );
|
|
return STATE_DEPENDENT;
|
|
}
|
|
else if ( sscanf ( header, HTTP_HEADER_LOCATION_MATCH HTTP_HEADER_PROTOCOL_MATCH HTTP_HEADER_HOSTNAME_MATCH HTTP_HEADER_URL_PATH_MATCH, &protocol, &hostname, url_path ) == 3) {
|
|
asprintf( &server_hostname, "%s", hostname );
|
|
asprintf( &server_host, "%s", hostname );
|
|
use_ssl = chk_protocol(protocol);
|
|
server_port = protocol_std_port(use_ssl);
|
|
asprintf( &http_url_path, "%s", url_path );
|
|
return STATE_DEPENDENT;
|
|
}
|
|
else if ( sscanf ( header, HTTP_HEADER_LOCATION_MATCH HTTP_HEADER_PROTOCOL_MATCH HTTP_HEADER_HOSTNAME_MATCH HTTP_HEADER_PORT_MATCH, &protocol, &hostname, &port ) == 3) {
|
|
asprintf( &server_hostname, "%s", hostname );
|
|
asprintf( &server_host, "%s", hostname );
|
|
use_ssl = chk_protocol(protocol);
|
|
server_port = atoi( port );
|
|
asprintf( &http_url_path, "%s", DEFAULT_HTTP_URL_PATH );
|
|
return STATE_DEPENDENT;
|
|
}
|
|
else if ( sscanf ( header, HTTP_HEADER_LOCATION_MATCH HTTP_HEADER_PROTOCOL_MATCH HTTP_HEADER_HOSTNAME_MATCH, protocol, hostname ) == 2 ) {
|
|
asprintf( &server_hostname, "%s", hostname );
|
|
asprintf( &server_host, "%s", hostname );
|
|
use_ssl = chk_protocol(protocol);
|
|
server_port = protocol_std_port(use_ssl);
|
|
asprintf( &http_url_path, "%s", DEFAULT_HTTP_URL_PATH );
|
|
}
|
|
else if ( sscanf ( header, HTTP_HEADER_LOCATION_MATCH HTTP_HEADER_URL_PATH_MATCH, url_path ) == 1 ) {
|
|
/* check for relative url and prepend path if necessary */
|
|
if ( ( url_path[0] != '/' ) && ( orig_url_dirname = strrchr( orig_url_path, '/' ) ) ) {
|
|
*orig_url_dirname = '\0';
|
|
asprintf( &http_url_path, "%s%s", orig_url_path, url_path );
|
|
} else {
|
|
asprintf( &http_url_path, "%s", url_path );
|
|
}
|
|
return STATE_DEPENDENT;
|
|
}
|
|
header += (size_t) strcspn( header, "\r\n" );
|
|
header += (size_t) strspn( header, "\r\n" );
|
|
} /* end while (header) */
|
|
|
|
|
|
/* default return value is STATE_DEPENDENT to continue looping in main() */
|
|
asprintf( &msg, "% %: % - Could not find redirect Location",
|
|
protocol_text( use_ssl ),
|
|
state_text( STATE_UNKNOWN ),
|
|
page->status );
|
|
terminate( STATE_UNKNOWN, msg );
|
|
}
|
|
|
|
#ifdef HAVE_SSL
|
|
int
|
|
https_request( SSL_CTX *ctx, SSL *ssl, struct pageref *page )
|
|
{
|
|
char *buffer = "";
|
|
char recvbuff[MAX_INPUT_BUFFER] = "";
|
|
int buffer_len = 0;
|
|
int content_len = 0;
|
|
size_t sendsize = 0;
|
|
size_t recvsize = 0;
|
|
char *content = "";
|
|
size_t size = 0;
|
|
char *basic_auth_encoded = NULL;
|
|
|
|
asprintf( &buffer, HTTP_TEMPLATE_REQUEST, buffer, http_method, http_url_path );
|
|
|
|
asprintf( &buffer, HTTP_TEMPLATE_HEADER_USERAGENT, buffer, progname, REVISION, PACKAGE_VERSION );
|
|
|
|
if ( use_server_hostname ) {
|
|
asprintf( &buffer, HTTP_TEMPLATE_HEADER_HOST, buffer, server_hostname );
|
|
}
|
|
|
|
if ( use_basic_auth ) {
|
|
basic_auth_encoded = base64( basic_auth, strlen( basic_auth ) );
|
|
asprintf( &buffer, HTTP_TEMPLATE_HEADER_AUTH, buffer, basic_auth_encoded );
|
|
}
|
|
|
|
/* either send http POST data */
|
|
if ( use_http_post_data ) {
|
|
asprintf( &buffer, "%sContent-Type: application/x-www-form-urlencoded\r\n", buffer );
|
|
asprintf( &buffer, "%sContent-Length: %i\r\n\r\n", buffer, content_len );
|
|
asprintf( &buffer, "%s%s%s", buffer, http_post_data, "\r\n" );
|
|
sendsize = SSL_write( ssl, buffer, strlen( buffer ) );
|
|
switch ( SSL_get_error( ssl, sendsize ) ) {
|
|
case SSL_ERROR_NONE:
|
|
if ( sendsize < strlen( buffer ) )
|
|
ssl_terminate( STATE_CRITICAL, "SSL ERROR: Incomplete write.\n" );
|
|
break;
|
|
default:
|
|
ssl_terminate( STATE_CRITICAL, "SSL ERROR: Write problem.\n" );
|
|
break;
|
|
}
|
|
/* or just a newline */
|
|
} else {
|
|
|
|
asprintf( &buffer, "%s\r\n", buffer );
|
|
sendsize = SSL_write( ssl, buffer, strlen( buffer ) );
|
|
switch ( SSL_get_error( ssl, sendsize ) ) {
|
|
case SSL_ERROR_NONE:
|
|
if ( sendsize < strlen( buffer ) )
|
|
ssl_terminate( STATE_CRITICAL, "SSL ERROR: Incomplete write.\n" );
|
|
break;
|
|
default:
|
|
ssl_terminate( STATE_CRITICAL, "SSL ERROR: Write problem.\n" );
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/* read server's response */
|
|
|
|
do {
|
|
recvsize = SSL_read( ssl, recvbuff, MAX_INPUT_BUFFER - 1 );
|
|
|
|
switch ( SSL_get_error( ssl, recvsize ) ) {
|
|
case SSL_ERROR_NONE:
|
|
if ( recvsize > (size_t) 0 ) {
|
|
recvbuff[recvsize] = '\0';
|
|
asprintf( &content, "%s%s", content, recvbuff );
|
|
size += recvsize;
|
|
}
|
|
break;
|
|
case SSL_ERROR_WANT_READ:
|
|
if ( use_client_certificate ) {
|
|
continue;
|
|
} else {
|
|
// workaround while we don't have anonymous client certificates: return OK
|
|
//ssl_terminate( STATE_WARNING, "HTTPS WARNING - Client Certificate required.\n" );
|
|
ssl_terminate( STATE_OK, "HTTPS WARNING - Client Certificate required.\n" );
|
|
}
|
|
break;
|
|
case SSL_ERROR_ZERO_RETURN:
|
|
break;
|
|
case SSL_ERROR_SYSCALL:
|
|
ssl_terminate( STATE_CRITICAL, "SSL ERROR: Premature close.\n" );
|
|
break;
|
|
default:
|
|
ssl_terminate( STATE_CRITICAL, "SSL ERROR: Read problem.\n" );
|
|
break;
|
|
}
|
|
} while ( recvsize > (size_t) 0 );
|
|
|
|
asprintf( &page->content, "%s", content );
|
|
page->size = size;
|
|
|
|
/* return a CRITICAL status if we couldn't read any data */
|
|
if ( size == (size_t) 0)
|
|
ssl_terminate( STATE_CRITICAL, "No data received" );
|
|
|
|
return STATE_OK;
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifdef HAVE_SSL
|
|
int
|
|
ssl_terminate(int state, char *string ) {
|
|
ERR_print_errors( bio_err );
|
|
terminate( state, string );
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_SSL
|
|
static int
|
|
password_cb( char *buf, int num, int rwflag, void *userdata )
|
|
{
|
|
if ( num < strlen( client_certificate_passphrase ) + 1 )
|
|
return( 0 );
|
|
|
|
strcpy( buf, client_certificate_passphrase );
|
|
return( strlen( client_certificate_passphrase ) );
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_SSL
|
|
static void
|
|
sigpipe_handle( int x ) {
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_SSL
|
|
SSL_CTX *
|
|
initialize_ssl_ctx( void )
|
|
{
|
|
SSL_METHOD *meth;
|
|
SSL_CTX *ctx;
|
|
|
|
if ( !bio_err ) {
|
|
/* Global system initialization */
|
|
SSL_library_init();
|
|
SSL_load_error_strings();
|
|
|
|
/* An error write context */
|
|
bio_err=BIO_new_fp( stderr, BIO_NOCLOSE );
|
|
}
|
|
|
|
/* set up as SIGPIPE handler */
|
|
signal( SIGPIPE, sigpipe_handle );
|
|
|
|
/* create our context */
|
|
meth=SSLv3_method();
|
|
ctx=SSL_CTX_new( meth );
|
|
|
|
/* load client certificate and key */
|
|
if ( use_client_certificate ) {
|
|
if ( !(SSL_CTX_use_certificate_chain_file( ctx, client_certificate_file )) )
|
|
ssl_terminate( STATE_CRITICAL, "check_http: can't read client certificate file" );
|
|
|
|
/* set client certificate key passphrase */
|
|
if ( use_client_certificate_passphrase ) {
|
|
SSL_CTX_set_default_passwd_cb( ctx, password_cb );
|
|
}
|
|
|
|
if ( !(SSL_CTX_use_PrivateKey_file( ctx, client_certificate_file, SSL_FILETYPE_PEM )) )
|
|
ssl_terminate( STATE_CRITICAL, "check_http: can't read client certificate key file" );
|
|
}
|
|
|
|
/* load the CAs we trust */
|
|
if ( use_ca_certificate ) {
|
|
if ( !(SSL_CTX_load_verify_locations( ctx, ca_certificate_file, 0 )) )
|
|
ssl_terminate( STATE_CRITICAL, "check_http: can't read CA certificate file" );
|
|
|
|
#if (OPENSSL_VERSION_NUMBER < 0x00905100L)
|
|
SSL_CTX_set_verify_depth( ctx, 1 );
|
|
#endif
|
|
}
|
|
|
|
return ctx;
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_SSL
|
|
void destroy_ssl_ctx( SSL_CTX *ctx )
|
|
{
|
|
SSL_CTX_free( ctx );
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_SSL
|
|
int
|
|
fetch_server_certificate( SSL *ssl )
|
|
{
|
|
server_certificate = SSL_get_peer_certificate( ssl );
|
|
if ( server_certificate == NULL )
|
|
ssl_terminate( STATE_CRITICAL, "SSL ERROR: Cannot retrieve server certificate.\n" );
|
|
|
|
return STATE_OK;
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifdef HAVE_SSL
|
|
int
|
|
check_server_certificate_chain( SSL *ssl )
|
|
{
|
|
if ( SSL_get_verify_result( ssl ) != X509_V_OK )
|
|
ssl_terminate( STATE_CRITICAL, "SSL ERROR: Cannot verify server certificate chain.\n" );
|
|
|
|
return STATE_OK;
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifdef HAVE_SSL
|
|
int
|
|
check_server_certificate_hostname( )
|
|
{
|
|
char server_CN[256];
|
|
char *msg = NULL;
|
|
X509_NAME_get_text_by_NID( X509_get_subject_name( server_certificate ), NID_commonName, server_CN, 256 );
|
|
if ( strcasecmp( server_CN, server_hostname ) ) {
|
|
asprintf( &msg, "SSL ERROR: Server Certificate does not match Hostname %s.\n", server_hostname );
|
|
ssl_terminate( STATE_WARNING, msg );
|
|
}
|
|
|
|
return STATE_OK;
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_SSL
|
|
int
|
|
check_server_certificate_expires( )
|
|
{
|
|
ASN1_STRING *tm;
|
|
int offset;
|
|
struct tm stamp;
|
|
int days_left;
|
|
char timestamp[17] = "";
|
|
char *msg = NULL;
|
|
|
|
/* Retrieve timestamp of certificate */
|
|
tm = X509_get_notAfter( server_certificate );
|
|
|
|
/* Generate tm structure to process timestamp */
|
|
if ( tm->type == V_ASN1_UTCTIME ) {
|
|
if ( tm->length < 10 ) {
|
|
ssl_terminate( STATE_CRITICAL, "ERROR: Wrong time format in certificate.\n" );
|
|
} 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 ) {
|
|
ssl_terminate( STATE_CRITICAL, "ERROR: Wrong time format in certificate.\n" );
|
|
} 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, 17, "%02d.%02d.%04d %02d:%02d",
|
|
stamp.tm_mday, stamp.tm_mon +1, stamp.tm_year + 1900,
|
|
stamp.tm_hour, stamp.tm_min );
|
|
|
|
if ( ( days_left > 0 ) && ( days_left <= server_certificate_min_days_valid ) ) {
|
|
asprintf( &msg, "Certificate expires in %d day(s) (%s).\n", days_left, timestamp );
|
|
ssl_terminate( STATE_WARNING, msg );
|
|
}
|
|
if ( days_left < 0 ) {
|
|
asprintf( &msg, "Certificate expired on %s.\n", timestamp );
|
|
ssl_terminate( STATE_CRITICAL, msg );
|
|
}
|
|
|
|
if (days_left == 0) {
|
|
asprintf( &msg, "Certificate expires today (%s).\n", timestamp );
|
|
ssl_terminate( STATE_WARNING, msg );
|
|
}
|
|
|
|
asprintf( &msg, "Certificate will expire on %s.\n", timestamp );
|
|
ssl_terminate( STATE_OK, msg );
|
|
}
|
|
#endif
|
|
|
|
/* written by lauri alanko */
|
|
static char *
|
|
base64 (char *bin, int len)
|
|
{
|
|
|
|
char *buf = (char *) malloc ((len + 2) / 3 * 4 + 1);
|
|
int i = 0, j = 0;
|
|
|
|
char BASE64_END = '=';
|
|
char base64_table[64] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
|
|
|
|
while (j < len - 2) {
|
|
buf[i++] = base64_table[bin[j] >> 2];
|
|
buf[i++] = base64_table[((bin[j] & 3) << 4) | (bin[j + 1] >> 4)];
|
|
buf[i++] = base64_table[((bin[j + 1] & 15) << 2) | (bin[j + 2] >> 6)];
|
|
buf[i++] = base64_table[bin[j + 2] & 63];
|
|
j += 3;
|
|
}
|
|
|
|
switch (len - j) {
|
|
case 1:
|
|
buf[i++] = base64_table[bin[j] >> 2];
|
|
buf[i++] = base64_table[(bin[j] & 3) << 4];
|
|
buf[i++] = BASE64_END;
|
|
buf[i++] = BASE64_END;
|
|
break;
|
|
case 2:
|
|
buf[i++] = base64_table[bin[j] >> 2];
|
|
buf[i++] = base64_table[((bin[j] & 3) << 4) | (bin[j + 1] >> 4)];
|
|
buf[i++] = base64_table[(bin[j + 1] & 15) << 2];
|
|
buf[i++] = BASE64_END;
|
|
break;
|
|
case 0:
|
|
break;
|
|
}
|
|
|
|
buf[i] = '\0';
|
|
return buf;
|
|
}
|
|
|