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diff --git a/manual/html_node/Simple-client-example-with-anonymous-authentication.html b/manual/html_node/Simple-client-example-with-anonymous-authentication.html deleted file mode 100644 index 07fb07561c..0000000000 --- a/manual/html_node/Simple-client-example-with-anonymous-authentication.html +++ /dev/null @@ -1,299 +0,0 @@ -<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> -<html> -<!-- This manual is last updated 4 March 2015 for version -3.5.4 of GnuTLS. - -Copyright (C) 2001-2015 Free Software Foundation, Inc.\\ -Copyright (C) 2001-2015 Nikos Mavrogiannopoulos - -Permission is granted to copy, distribute and/or modify this document -under the terms of the GNU Free Documentation License, Version 1.3 or -any later version published by the Free Software Foundation; with no -Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A -copy of the license is included in the section entitled "GNU Free -Documentation License". --> -<!-- Created by GNU Texinfo 6.1, http://www.gnu.org/software/texinfo/ --> -<head> -<title>GnuTLS 3.5.4: Simple client example with anonymous authentication</title> - -<meta name="description" content="GnuTLS 3.5.4: Simple client example with anonymous authentication"> -<meta name="keywords" content="GnuTLS 3.5.4: Simple client example with anonymous authentication"> -<meta name="resource-type" content="document"> -<meta name="distribution" content="global"> -<meta name="Generator" content="makeinfo"> -<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> -<link href="index.html#Top" rel="start" title="Top"> -<link href="Function-and-Data-Index.html#Function-and-Data-Index" rel="index" title="Function and Data Index"> -<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> -<link href="Client-examples.html#Client-examples" rel="up" title="Client examples"> -<link href="Simple-Datagram-TLS-client-example.html#Simple-Datagram-TLS-client-example" rel="next" title="Simple Datagram TLS client example"> -<link href="Simple-client-example-with-SSH_002dstyle-certificate-verification.html#Simple-client-example-with-SSH_002dstyle-certificate-verification" rel="prev" title="Simple client example with SSH-style certificate verification"> -<style type="text/css"> -<!-- -a.summary-letter {text-decoration: none} -blockquote.indentedblock {margin-right: 0em} -blockquote.smallindentedblock {margin-right: 0em; 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- background-color: #f0faff; - border-width: 0px; - margin: 1em auto; - text-align: left; - margin-left:auto; - margin-right:auto; - padding-left: 1em; -} - -dl { - text-align: left; - margin-left:auto; - margin-right:auto; - width: 50%; - - padding-left: 1em; - border: solid #c2e0ff; - background: #f0faff; - border-width: 5px 1px 1px 1px; - margin: 1em auto; -} - ---> -</style> - - -</head> - -<body lang="en"> -<a name="Simple-client-example-with-anonymous-authentication"></a> -<div class="header"> -<p> -Next: <a href="Simple-Datagram-TLS-client-example.html#Simple-Datagram-TLS-client-example" accesskey="n" rel="next">Simple Datagram TLS client example</a>, Previous: <a href="Simple-client-example-with-SSH_002dstyle-certificate-verification.html#Simple-client-example-with-SSH_002dstyle-certificate-verification" accesskey="p" rel="prev">Simple client example with SSH-style certificate verification</a>, Up: <a href="Client-examples.html#Client-examples" accesskey="u" rel="up">Client examples</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Function-and-Data-Index.html#Function-and-Data-Index" title="Index" rel="index">Index</a>]</p> -</div> -<hr> -<a name="Simple-client-example-with-anonymous-authentication-1"></a> -<h4 class="subsection">7.1.3 Simple client example with anonymous authentication</h4> - -<p>The simplest client using TLS is the one that doesn’t do any -authentication. This means no external certificates or passwords are -needed to set up the connection. As could be expected, the connection -is vulnerable to man-in-the-middle (active or redirection) attacks. -However, the data are integrity protected and encrypted from -passive eavesdroppers. -</p> -<p>Note that due to the vulnerable nature of this method very few public -servers support it. -</p> -<pre class="verbatim">/* This example code is placed in the public domain. */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/types.h> -#include <sys/socket.h> -#include <arpa/inet.h> -#include <unistd.h> -#include <gnutls/gnutls.h> - -/* A very basic TLS client, with anonymous authentication. - */ - -#define MAX_BUF 1024 -#define MSG "GET / HTTP/1.0\r\n\r\n" - -extern int tcp_connect(void); -extern void tcp_close(int sd); - -int main(void) -{ - int ret, sd, ii; - gnutls_session_t session; - char buffer[MAX_BUF + 1]; - gnutls_anon_client_credentials_t anoncred; - /* Need to enable anonymous KX specifically. */ - - gnutls_global_init(); - - gnutls_anon_allocate_client_credentials(&anoncred); - - /* Initialize TLS session - */ - gnutls_init(&session, GNUTLS_CLIENT); - - /* Use default priorities */ - gnutls_priority_set_direct(session, - "PERFORMANCE:+ANON-ECDH:+ANON-DH", - NULL); - - /* put the anonymous credentials to the current session - */ - gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred); - - /* connect to the peer - */ - sd = tcp_connect(); - - gnutls_transport_set_int(session, sd); - gnutls_handshake_set_timeout(session, - GNUTLS_DEFAULT_HANDSHAKE_TIMEOUT); - - /* Perform the TLS handshake - */ - do { - ret = gnutls_handshake(session); - } - while (ret < 0 && gnutls_error_is_fatal(ret) == 0); - - if (ret < 0) { - fprintf(stderr, "*** Handshake failed\n"); - gnutls_perror(ret); - goto end; - } else { - char *desc; - - desc = gnutls_session_get_desc(session); - printf("- Session info: %s\n", desc); - gnutls_free(desc); - } - - gnutls_record_send(session, MSG, strlen(MSG)); - - ret = gnutls_record_recv(session, buffer, MAX_BUF); - if (ret == 0) { - printf("- Peer has closed the TLS connection\n"); - goto end; - } else if (ret < 0 && gnutls_error_is_fatal(ret) == 0) { - fprintf(stderr, "*** Warning: %s\n", gnutls_strerror(ret)); - } else if (ret < 0) { - fprintf(stderr, "*** Error: %s\n", gnutls_strerror(ret)); - goto end; - } - - if (ret > 0) { - printf("- Received %d bytes: ", ret); - for (ii = 0; ii < ret; ii++) { - fputc(buffer[ii], stdout); - } - fputs("\n", stdout); - } - - gnutls_bye(session, GNUTLS_SHUT_RDWR); - - end: - - tcp_close(sd); - - gnutls_deinit(session); - - gnutls_anon_free_client_credentials(anoncred); - - gnutls_global_deinit(); - - return 0; -} -</pre> - -<hr> -<div class="header"> -<p> -Next: <a href="Simple-Datagram-TLS-client-example.html#Simple-Datagram-TLS-client-example" accesskey="n" rel="next">Simple Datagram TLS client example</a>, Previous: <a href="Simple-client-example-with-SSH_002dstyle-certificate-verification.html#Simple-client-example-with-SSH_002dstyle-certificate-verification" accesskey="p" rel="prev">Simple client example with SSH-style certificate verification</a>, Up: <a href="Client-examples.html#Client-examples" accesskey="u" rel="up">Client examples</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Function-and-Data-Index.html#Function-and-Data-Index" title="Index" rel="index">Index</a>]</p> -</div> - - - -</body> -</html> |