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- djm@cvs.openbsd.org 2010/02/26 20:29:54 [PROTOCOL PROTOCOL.agent PROTOCOL.certkeys addrmatch.c auth-options.c] [auth-options.h auth.h auth2-pubkey.c authfd.c dns.c dns.h hostfile.c] [hostfile.h kex.h kexdhs.c kexgexs.c key.c key.h match.h monitor.c] [myproposal.h servconf.c servconf.h ssh-add.c ssh-agent.c ssh-dss.c] [ssh-keygen.1 ssh-keygen.c ssh-rsa.c ssh.1 ssh.c ssh2.h sshconnect.c] [sshconnect2.c sshd.8 sshd.c sshd_config.5] Add support for certificate key types for users and hosts. OpenSSH certificate key types are not X.509 certificates, but a much simpler format that encodes a public key, identity information and some validity constraints and signs it with a CA key. CA keys are regular SSH keys. This certificate style avoids the attack surface of X.509 certificates and is very easy to deploy. Certified host keys allow automatic acceptance of new host keys when a CA certificate is marked as sh/known_hosts. see VERIFYING HOST KEYS in ssh(1) for details. Certified user keys allow authentication of users when the signing CA key is marked as trusted in authorized_keys. See "AUTHORIZED_KEYS FILE FORMAT" in sshd(8) for details. Certificates are minted using ssh-keygen(1), documentation is in the "CERTIFICATES" section of that manpage. Documentation on the format of certificates is in the file PROTOCOL.certkeys feedback and ok markus@
72 lines
2.6 KiB
C
72 lines
2.6 KiB
C
/* $OpenBSD: myproposal.h,v 1.24 2010/02/26 20:29:54 djm Exp $ */
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/*
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* Copyright (c) 2000 Markus Friedl. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <openssl/opensslv.h>
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/* Old OpenSSL doesn't support what we need for DHGEX-sha256 */
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#if OPENSSL_VERSION_NUMBER < 0x00907000L
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# define KEX_DEFAULT_KEX \
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"diffie-hellman-group-exchange-sha1," \
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"diffie-hellman-group14-sha1," \
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"diffie-hellman-group1-sha1"
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#else
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# define KEX_DEFAULT_KEX \
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"diffie-hellman-group-exchange-sha256," \
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"diffie-hellman-group-exchange-sha1," \
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"diffie-hellman-group14-sha1," \
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"diffie-hellman-group1-sha1"
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#endif
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#define KEX_DEFAULT_PK_ALG "ssh-rsa-cert-v00@openssh.com," \
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"ssh-dss-cert-v00@openssh.com," \
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"ssh-rsa,ssh-dss"
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#define KEX_DEFAULT_ENCRYPT \
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"aes128-ctr,aes192-ctr,aes256-ctr," \
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"arcfour256,arcfour128," \
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"aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc," \
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"aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se"
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#define KEX_DEFAULT_MAC \
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"hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160," \
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"hmac-ripemd160@openssh.com," \
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"hmac-sha1-96,hmac-md5-96"
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#define KEX_DEFAULT_COMP "none,zlib@openssh.com,zlib"
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#define KEX_DEFAULT_LANG ""
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static char *myproposal[PROPOSAL_MAX] = {
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KEX_DEFAULT_KEX,
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KEX_DEFAULT_PK_ALG,
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KEX_DEFAULT_ENCRYPT,
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KEX_DEFAULT_ENCRYPT,
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KEX_DEFAULT_MAC,
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KEX_DEFAULT_MAC,
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KEX_DEFAULT_COMP,
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KEX_DEFAULT_COMP,
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KEX_DEFAULT_LANG,
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KEX_DEFAULT_LANG
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};
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