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103 lines
4.4 KiB
C
103 lines
4.4 KiB
C
/***************************************************************************
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* ncat_ssl.h *
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***********************IMPORTANT NMAP LICENSE TERMS************************
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*
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* The Nmap Security Scanner is (C) 1996-2025 Nmap Software LLC ("The Nmap
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* Project"). Nmap is also a registered trademark of the Nmap Project.
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*
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* This program is distributed under the terms of the Nmap Public Source
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* License (NPSL). The exact license text applying to a particular Nmap
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* release or source code control revision is contained in the LICENSE
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* file distributed with that version of Nmap or source code control
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* revision. More Nmap copyright/legal information is available from
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* https://nmap.org/book/man-legal.html, and further information on the
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* NPSL license itself can be found at https://nmap.org/npsl/ . This
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* header summarizes some key points from the Nmap license, but is no
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* substitute for the actual license text.
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*
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* Nmap is generally free for end users to download and use themselves,
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* including commercial use. It is available from https://nmap.org.
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*
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* The Nmap license generally prohibits companies from using and
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* redistributing Nmap in commercial products, but we sell a special Nmap
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* OEM Edition with a more permissive license and special features for
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* this purpose. See https://nmap.org/oem/
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*
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* If you have received a written Nmap license agreement or contract
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* stating terms other than these (such as an Nmap OEM license), you may
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* choose to use and redistribute Nmap under those terms instead.
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*
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* The official Nmap Windows builds include the Npcap software
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* (https://npcap.com) for packet capture and transmission. It is under
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* separate license terms which forbid redistribution without special
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* permission. So the official Nmap Windows builds may not be redistributed
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* without special permission (such as an Nmap OEM license).
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*
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* Source is provided to this software because we believe users have a
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* right to know exactly what a program is going to do before they run it.
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* This also allows you to audit the software for security holes.
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*
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* Source code also allows you to port Nmap to new platforms, fix bugs, and
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* add new features. You are highly encouraged to submit your changes as a
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* Github PR or by email to the dev@nmap.org mailing list for possible
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* incorporation into the main distribution. Unless you specify otherwise, it
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* is understood that you are offering us very broad rights to use your
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* submissions as described in the Nmap Public Source License Contributor
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* Agreement. This is important because we fund the project by selling licenses
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* with various terms, and also because the inability to relicense code has
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* caused devastating problems for other Free Software projects (such as KDE
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* and NASM).
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*
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* The free version of Nmap is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Warranties,
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* indemnification and commercial support are all available through the
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* Npcap OEM program--see https://nmap.org/oem/
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*
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***************************************************************************/
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/* $Id$ */
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#ifndef NCAT_SSL_H
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#define NCAT_SSL_H
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#include "ncat_config.h"
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#ifdef HAVE_OPENSSL
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#define NCAT_CA_CERTS_FILE "ca-bundle.crt"
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enum {
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SHA1_BYTES = 160 / 8,
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/* 40 bytes for hex digits and 9 bytes for ' '. */
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SHA1_STRING_LENGTH = SHA1_BYTES * 2 + (SHA1_BYTES / 2 - 1)
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};
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/* These status variables are returned by ssl_handshake() to describe the
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* status of a pending non-blocking ssl handshake(SSL_accept()). */
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enum {
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NCAT_SSL_HANDSHAKE_COMPLETED = 0,
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NCAT_SSL_HANDSHAKE_PENDING_READ = 1,
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NCAT_SSL_HANDSHAKE_PENDING_WRITE = 2,
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NCAT_SSL_HANDSHAKE_FAILED = 3
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};
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extern SSL_CTX *setup_ssl_listen(const SSL_METHOD *method);
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extern SSL *new_ssl(int fd);
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extern int ssl_post_connect_check(SSL *ssl, const char *hostname);
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extern char *ssl_cert_fp_str_sha1(const X509 *cert, char *strbuf, size_t len);
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extern int ssl_load_default_ca_certs(SSL_CTX *ctx);
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/* Try to complete an ssl handshake in a non-blocking way for the socket given
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* in sinfo. Initialize the socket too with new_ssl() if it hasn't been done
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* already. */
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extern int ssl_handshake(struct fdinfo *sinfo);
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#endif
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#endif
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