ttssh2/ttxssh/dns.h

/*
 * (C) 2011- TeraTerm Project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __TTSSH_DNS_H
#define __TTSSH_DNS_H

#define DNS_TYPE_SSHFP  44

enum sshfp_types {
        SSHFP_KEY_RESERVED = 0,  // RFC4255
        SSHFP_KEY_RSA = 1,       // RFC4255
        SSHFP_KEY_DSA = 2,       // RFC4255
        SSHFP_KEY_ECDSA = 3,     // RFC6594
        SSHFP_KEY_ED25519 = 4    // RFC7479
};

enum sshfp_hashes {
        SSHFP_HASH_RESERVED = 0, // RFC4255
        SSHFP_HASH_SHA1 = 1,     // RFC4255
        SSHFP_HASH_SHA256 = 2    // RFC6594
};

enum verifydns_result {
        DNS_VERIFY_NONE,
        DNS_VERIFY_NOTFOUND,
        DNS_VERIFY_MATCH,
        DNS_VERIFY_MISMATCH,
        DNS_VERIFY_DIFFERENTTYPE,
        DNS_VERIFY_AUTH_MATCH,
        DNS_VERIFY_AUTH_MISMATCH,
        DNS_VERIFY_AUTH_DIFFERENTTYPE
};

typedef struct {
        BYTE Algorithm;
        BYTE DigestType;
        BYTE Digest[1];
} DNS_SSHFP_DATA, *PDNS_SSHFP_DATA;

int is_numeric_hostname(const char *hostname);
int verify_hostkey_dns(PTInstVar pvar, char *hostname, Key *key);

#endif //  __TTSSH_DNS_H