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Commit Graph

28 Commits

Author SHA1 Message Date
djm@openbsd.org
dfe18a2955 upstream: make struct hostkeys public; I have no idea why I made it
opaque originally.

ok markus@

OpenBSD-Commit-ID: e50780b34d4bbe628d69b2405b024dd749d982f3
2021-01-26 12:21:48 +11:00
djm@openbsd.org
b4c7cd1185 upstream: load_hostkeys()/hostkeys_foreach() variants for FILE*
Add load_hostkeys_file() and hostkeys_foreach_file() that accept a
FILE* argument instead of opening the file directly.

Original load_hostkeys() and hostkeys_foreach() are implemented using
these new interfaces.

Add a u_int note field to the hostkey_entry and hostkey_foreach_line
structs that is passed directly from the load_hostkeys() and
hostkeys_foreach() call. This is a lightweight way to annotate results
between different invocations of load_hostkeys().

ok markus@

OpenBSD-Commit-ID: 6ff6db13ec9ee4edfa658b2c38baad0f505d8c20
2020-12-21 10:52:28 +11:00
djm@openbsd.org
af889a40ff upstream: when ordering host key algorithms in the client, consider
the ECDSA key subtype; ok markus@

OpenBSD-Commit-ID: 3097686f853c61ff61772ea35f8b699931392ece
2020-10-07 13:33:12 +11:00
dtucker@openbsd.org
74344c3ca4 upstream: Defer creation of ~/.ssh by ssh(1) until we attempt to
write to it so we don't leave an empty .ssh directory when it's not needed.
Use the same function to replace the code in ssh-keygen that does the same
thing. bz#3156, ok djm@

OpenBSD-Commit-ID: 59c073b569be1a60f4de36f491a4339bc4ae870f
2020-06-26 15:24:27 +10:00
djm@openbsd.org
05a651400d upstream: when ordering the hostkey algorithms to request from a
server, prefer certificate types if the known_hosts files contain a key
marked as a @cert-authority; bz#3157 ok markus@

OpenBSD-Commit-ID: 8f194573e5bb7c01b69bbfaabc68f27c9fa5e0db
2020-05-27 10:09:18 +10:00
djm@openbsd.org
6c5c949782 upstream commit
Refactor hostkeys_foreach() and dependent code Deal with
 IP addresses (i.e. CheckHostIP) Don't clobber known_hosts when nothing
 changed ok markus@ as part of larger commit
2015-02-17 09:32:31 +11:00
djm@openbsd.org
8d4f87258f upstream commit
Host key rotation support.

Add a hostkeys@openssh.com protocol extension (global request) for
a server to inform a client of all its available host key after
authentication has completed. The client may record the keys in
known_hosts, allowing it to upgrade to better host key algorithms
and a server to gracefully rotate its keys.

The client side of this is controlled by a UpdateHostkeys config
option (default on).

ok markus@
2015-01-27 00:00:57 +11:00
djm@openbsd.org
c29811cc48 upstream commit
introduce hostkeys_foreach() to allow iteration over a
 known_hosts file or controlled subset thereof. This will allow us to pull out
 some ugly and duplicated code, and will be used to implement hostkey rotation
 later.

feedback and ok markus
2015-01-20 00:20:43 +11:00
djm@openbsd.org
1129dcfc5a upstream commit
sync ssh-keysign, ssh-keygen and some dependencies to the
 new buffer/key API; mostly mechanical, ok markus@
2015-01-15 21:39:14 +11:00
Damien Miller
ce98654674 - djm@cvs.openbsd.org 2013/07/12 00:19:59
[auth-options.c auth-rsa.c bufaux.c buffer.h channels.c hostfile.c]
     [hostfile.h mux.c packet.c packet.h roaming_common.c serverloop.c]
     fix pointer-signedness warnings from clang/llvm-3.3; "seems nice" deraadt@
2013-07-18 16:12:44 +10:00
Damien Miller
d925dcd8a5 - djm@cvs.openbsd.org 2010/11/29 23:45:51
[auth.c hostfile.c hostfile.h ssh.c ssh_config.5 sshconnect.c]
     [sshconnect.h sshconnect2.c]
     automatically order the hostkeys requested by the client based on
     which hostkeys are already recorded in known_hosts. This avoids
     hostkey warnings when connecting to servers with new ECDSA keys
     that are preferred by default; with markus@
2010-12-01 12:21:51 +11:00
Damien Miller
1aed65eb27 - djm@cvs.openbsd.org 2010/03/04 10:36:03
[auth-rh-rsa.c auth-rsa.c auth.c auth.h auth2-hostbased.c auth2-pubkey.c]
     [authfile.c authfile.h hostfile.c hostfile.h servconf.c servconf.h]
     [ssh-keygen.c ssh.1 sshconnect.c sshd_config.5]
     Add a TrustedUserCAKeys option to sshd_config to specify CA keys that
     are trusted to authenticate users (in addition than doing it per-user
     in authorized_keys).

     Add a RevokedKeys option to sshd_config and a @revoked marker to
     known_hosts to allow keys to me revoked and banned for user or host
     authentication.

     feedback and ok markus@
2010-03-04 21:53:35 +11:00
Damien Miller
0a80ca190a - OpenBSD CVS Sync
- 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@
2010-02-27 07:55:05 +11:00
Damien Miller
51096383e9 - djm@cvs.openbsd.org 2006/03/25 22:22:43
[atomicio.h auth-options.h auth.h auth2-gss.c authfd.h authfile.h]
     [bufaux.h buffer.h canohost.h channels.h cipher.h clientloop.h]
     [compat.h compress.h crc32.c crc32.h deattack.h dh.h dispatch.h]
     [dns.c dns.h getput.h groupaccess.h gss-genr.c gss-serv-krb5.c]
     [gss-serv.c hostfile.h includes.h kex.h key.h log.h mac.h match.h]
     [misc.h monitor.h monitor_fdpass.h monitor_mm.h monitor_wrap.h msg.h]
     [myproposal.h packet.h pathnames.h progressmeter.h readconf.h rsa.h]
     [scard.h servconf.h serverloop.h session.h sftp-common.h sftp.h]
     [ssh-gss.h ssh.h ssh1.h ssh2.h sshconnect.h sshlogin.h sshpty.h]
     [ttymodes.h uidswap.h uuencode.h xmalloc.h]
     standardise spacing in $OpenBSD$ tags; requested by deraadt@
2006-03-26 14:30:00 +11:00
Damien Miller
e1776155d1 - djm@cvs.openbsd.org 2005/03/01 10:40:27
[hostfile.c hostfile.h readconf.c readconf.h ssh.1 ssh_config.5]
     [sshconnect.c sshd.8]
     add support for hashing host names and addresses added to known_hosts
     files, to improve privacy of which hosts user have been visiting; ok
     markus@ deraadt@
2005-03-01 21:47:37 +11:00
Damien Miller
f58b58ced1 - jakob@cvs.openbsd.org 2003/11/10 16:23:41
[bufaux.c bufaux.h cipher.c cipher.h hostfile.c hostfile.h key.c]
     [key.h sftp-common.c sftp-common.h sftp-server.c sshconnect.c sshd.c]
     [ssh-dss.c ssh-rsa.c uuencode.c uuencode.h]
     constify. ok markus@ & djm@
2003-11-17 21:18:23 +11:00
Ben Lindstrom
93576d9538 - deraadt@cvs.openbsd.org 2002/11/21 23:03:51
[auth-krb5.c auth1.c hostfile.h monitor_wrap.c sftp-client.c sftp-int.c ssh-add.c ssh-rsa.c
      sshconnect.c]
     KNF
2002-12-23 02:06:19 +00:00
Damien Miller
4d53d39b07 - (djm) OpenBSD CVS Sync
- markus@cvs.openbsd.org 2002/09/08 20:24:08
     [hostfile.h]
     no comma at end of enumerator list
2002-09-12 09:43:56 +10:00
Ben Lindstrom
3ed6640532 - markus@cvs.openbsd.org 2002/07/24 16:11:18
[hostfile.c hostfile.h sshconnect.c]
     print out all known keys for a host if we get a unknown host key,
     see discussion at http://marc.theaimsgroup.com/?t=101069210100016&r=1&w=4

     the ssharp mitm tool attacks users in a similar way, so i'd like to
     pointed out again:
        A MITM attack is always possible if the ssh client prints:
        The authenticity of host 'bla' can't be established.
     (protocol version 2 with pubkey authentication allows you to detect
     MITM attacks)
2002-08-01 01:21:56 +00:00
Damien Miller
5b2aea9494 - jakob@cvs.openbsd.org 2001/12/18 10:04:21
[auth.h hostfile.c hostfile.h]
     remove auth_rsa_read_key, make hostfile_ready_key non static; ok markus@
2001-12-21 12:47:09 +11:00
Ben Lindstrom
4cc240dabb - markus@cvs.openbsd.org 2001/06/26 17:27:25
[authfd.h authfile.h auth.h auth-options.h bufaux.h buffer.h
      canohost.h channels.h cipher.h clientloop.h compat.h compress.h
      crc32.h deattack.h dh.h dispatch.h groupaccess.c groupaccess.h
      hostfile.h kex.h key.h log.c log.h mac.h misc.c misc.h mpaux.h
      packet.h radix.h readconf.h readpass.h rsa.h servconf.h serverloop.h
      session.h sftp-common.c sftp-common.h sftp-glob.h sftp-int.h
      sshconnect.h ssh-dss.h sshlogin.h sshpty.h ssh-rsa.h sshtty.h
      tildexpand.h uidswap.h uuencode.h xmalloc.h]
     remove comments from .h, since they are cut&paste from the .c files
     and out of sync
2001-07-04 04:46:56 +00:00
Ben Lindstrom
16ae3d0dba - itojun@cvs.openbsd.org 2001/06/26 06:32:58
[atomicio.h authfd.h authfile.h auth.h auth-options.h bufaux.h
      buffer.h canohost.h channels.h cipher.h clientloop.h compat.h
      compress.h crc32.h deattack.h dh.h dispatch.h groupaccess.h
      hostfile.h kex.h key.h log.h mac.h match.h misc.h mpaux.h packet.h
      radix.h readconf.h readpass.h rsa.h]
     prototype pedant.  not very creative...
     - () -> (void)
     - no variable names
2001-07-04 04:02:36 +00:00
Ben Lindstrom
31ca54aa86 - itojun@cvs.openbsd.org 2001/02/08 19:30:52
sync with netbsd tree changes.
     - more strict prototypes, include necessary headers
     - use paths.h/pathnames.h decls
     - size_t typecase to int -> u_long
2001-02-09 02:11:24 +00:00
Ben Lindstrom
36579d3daa - niklas@cvs.openbsd.org 2001/01/2001
[atomicio.h canohost.h clientloop.h deattack.h dh.h dispatch.h
      groupaccess.c groupaccess.h hmac.h hostfile.h includes.h kex.h
      key.h log.h login.h match.h misc.h myproposal.h nchan.ms pathnames.h
      radix.h readpass.h rijndael.h serverloop.h session.h sftp.h ssh-add.1
      ssh-dss.h ssh-keygen.1 ssh-keyscan.1 ssh-rsa.h ssh1.h ssh_config
      sshconnect.h sshd_config tildexpand.h uidswap.h uuencode.h]
     $OpenBSD$
2001-01-29 07:39:26 +00:00
Ben Lindstrom
46c162204b One way to massive patch. <sigh> It compiles and works under Linux..
And I think I have all the bits right from the OpenBSD tree.
20001222
 - Updated RCSID for pty.c
 - (bal) OpenBSD CVS Updates:
  - markus@cvs.openbsd.org 2000/12/21 15:10:16
    [auth-rh-rsa.c hostfile.c hostfile.h sshconnect.c]
    print keyfile:line for changed hostkeys, for deraadt@, ok deraadt@
  - markus@cvs.openbsd.org 2000/12/20 19:26:56
    [authfile.c]
    allow ssh -i userkey for root
  - markus@cvs.openbsd.org 2000/12/20 19:37:21
    [authfd.c authfd.h kex.c sshconnect2.c sshd.c uidswap.c uidswap.h]
    fix prototypes; from stevesk@pobox.com
  - markus@cvs.openbsd.org 2000/12/20 19:32:08
    [sshd.c]
    init pointer to NULL; report from Jan.Ivan@cern.ch
  - markus@cvs.openbsd.org 2000/12/19 23:17:54
    [auth-krb4.c auth-options.c auth-options.h auth-rhosts.c auth-rsa.c
     auth1.c auth2-skey.c auth2.c authfd.c authfd.h authfile.c bufaux.c
     bufaux.h buffer.c canohost.c channels.c clientloop.c compress.c
     crc32.c deattack.c getput.h hmac.c hmac.h hostfile.c kex.c kex.h
     key.c key.h log.c login.c match.c match.h mpaux.c mpaux.h packet.c
     packet.h radix.c readconf.c rsa.c scp.c servconf.c servconf.h
     serverloop.c session.c sftp-server.c ssh-agent.c ssh-dss.c ssh-dss.h
     ssh-keygen.c ssh-keyscan.c ssh-rsa.c ssh-rsa.h ssh.c ssh.h  uuencode.c
     uuencode.h sshconnect1.c sshconnect2.c sshd.c tildexpand.c]
    replace 'unsigned bla' with 'u_bla' everywhere. also replace 'char
    unsigned' with u_char.
2000-12-22 01:43:59 +00:00
Damien Miller
e4340be5b3 - (djm) Merge OpenBSD changes:
- markus@cvs.openbsd.org  2000/09/05 02:59:57
     [session.c]
     print hostname (not hushlogin)
   - markus@cvs.openbsd.org  2000/09/05 13:18:48
     [authfile.c ssh-add.c]
     enable ssh-add -d for DSA keys
   - markus@cvs.openbsd.org  2000/09/05 13:20:49
     [sftp-server.c]
     cleanup
   - markus@cvs.openbsd.org  2000/09/06 03:46:41
     [authfile.h]
     prototype
   - deraadt@cvs.openbsd.org 2000/09/07 14:27:56
     [ALL]
     cleanup copyright notices on all files.  I have attempted to be
     accurate with the details.  everything is now under Tatu's licence
     (which I copied from his readme), and/or the core-sdi bsd-ish thing
     for deattack, or various openbsd developers under a 2-term bsd
     licence.  We're not changing any rules, just being accurate.
   - markus@cvs.openbsd.org  2000/09/07 14:40:30
     [channels.c channels.h clientloop.c serverloop.c ssh.c]
     cleanup window and packet sizes for ssh2 flow control; ok niels
   - markus@cvs.openbsd.org  2000/09/07 14:53:00
     [scp.c]
     typo
   - markus@cvs.openbsd.org  2000/09/07 15:13:37
     [auth-options.c auth-options.h auth-rh-rsa.c auth-rsa.c auth.c]
     [authfile.h canohost.c channels.h compat.c hostfile.h log.c match.h]
     [pty.c readconf.c]
     some more Copyright fixes
   - markus@cvs.openbsd.org  2000/09/08 03:02:51
     [README.openssh2]
     bye bye
   - deraadt@cvs.openbsd.org 2000/09/11 18:38:33
     [LICENCE cipher.c]
     a few more comments about it being ARC4 not RC4
   - markus@cvs.openbsd.org  2000/09/12 14:53:11
     [log-client.c log-server.c log.c ssh.1 ssh.c ssh.h sshd.8 sshd.c]
     multiple debug levels
   - markus@cvs.openbsd.org  2000/09/14 14:25:15
     [clientloop.c]
     typo
   - deraadt@cvs.openbsd.org 2000/09/15 01:13:51
     [ssh-agent.c]
     check return value for setenv(3) for failure, and deal appropriately
2000-09-16 13:29:08 +11:00
Damien Miller
4af51306d9 - OpenBSD CVS updates.
[ssh.1 ssh.c]
   - ssh -2
   [auth.c channels.c clientloop.c packet.c packet.h serverloop.c]
   [session.c sshconnect.c]
   - check payload for (illegal) extra data
   [ALL]
   - whitespace cleanup
2000-04-16 11:18:38 +10:00
Damien Miller
450a7a1ff4 - OpenBSD CVS update
- [auth-krb4.c]
     -Wall
   - [auth-rh-rsa.c auth-rsa.c hostfile.c hostfile.h key.c key.h match.c]
     [match.h ssh.c ssh.h sshconnect.c sshd.c]
     initial support for DSA keys. ok deraadt@, niels@
   - [cipher.c cipher.h]
     remove unused cipher_attack_detected code
   - [scp.1 ssh-add.1 ssh-agent.1 ssh-keygen.1 ssh.1 sshd.8]
     Fix some formatting problems I missed before.
   - [ssh.1 sshd.8]
     fix spelling errors, From: FreeBSD
   - [ssh.c]
     switch to raw mode only if he _get_ a pty (not if we _want_ a pty).
2000-03-26 13:04:51 +10:00