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2019-11-25upstream: document the "no-touch-required" certificate extension;djm@openbsd.org
ok markus, feedback deraadt OpenBSD-Commit-ID: 47640122b13f825e9c404ea99803b2372246579d
2018-11-16upstream: mention ssh-ed25519-cert-v01@openssh.com in list of certdjm@openbsd.org
key type at start of doc OpenBSD-Commit-ID: b46b0149256d67f05f2d5d01e160634ed1a67324
2018-07-03upstream: Improve strictness and control over RSA-SHA2 signaturedjm@openbsd.org
In ssh, when an agent fails to return a RSA-SHA2 signature when requested and falls back to RSA-SHA1 instead, retry the signature to ensure that the public key algorithm sent in the SSH_MSG_USERAUTH matches the one in the signature itself. In sshd, strictly enforce that the public key algorithm sent in the SSH_MSG_USERAUTH message matches what appears in the signature. Make the sshd_config PubkeyAcceptedKeyTypes and HostbasedAcceptedKeyTypes options control accepted signature algorithms (previously they selected supported key types). This allows these options to ban RSA-SHA1 in favour of RSA-SHA2. Add new signature algorithms "rsa-sha2-256-cert-v01@openssh.com" and "rsa-sha2-512-cert-v01@openssh.com" to force use of RSA-SHA2 signatures with certificate keys. feedback and ok markus@ OpenBSD-Commit-ID: c6e9f6d45eed8962ad502d315d7eaef32c419dde
2018-04-10upstream: lots of typos in comments/docs. Patch from Karsten Weissdjm@openbsd.org
after checking with codespell tool (https://github.com/lucasdemarchi/codespell) OpenBSD-Commit-ID: 373222f12d7ab606598a2d36840c60be93568528
2017-11-03upstream commitdjm@openbsd.org@openbsd.org
typos in ECDSA certificate names; bz#2787 reported by Mike Gerow OpenBSD-Commit-ID: 824938b6aba1b31321324ba1f56c05f84834b163
2017-05-31upstream commitdjm@openbsd.org
spell out that custom options/extensions should follow the usual SSH naming rules, e.g. "extension@example.com" Upstream-ID: ab326666d2fad40769ec96b5a6de4015ffd97b8d
2017-05-17upstream commitdjm@openbsd.org
mention that Ed25519 keys are valid as CA keys; spotted by Jakub Jelen Upstream-ID: d3f6db58b30418cb1c3058211b893a1ffed3dfd4
2016-05-03upstream commitdjm@openbsd.org
correct some typos and remove a long-stale XXX note. add specification for ed25519 certificates mention no host certificate options/extensions are currently defined pointed out by Simon Tatham Upstream-ID: 7b535ab7dba3340b7d8210ede6791fdaefdf839a
2012-04-22 - djm@cvs.openbsd.org 2012/03/28 07:23:22Damien Miller
[PROTOCOL.certkeys] explain certificate extensions/crit split rationale. Mention requirement that each appear at most once per cert.
2010-08-31 - djm@cvs.openbsd.org 2010/08/31 11:54:45Damien Miller
[PROTOCOL PROTOCOL.agent PROTOCOL.certkeys auth2-jpake.c authfd.c] [authfile.c buffer.h dns.c kex.c kex.h key.c key.h monitor.c] [monitor_wrap.c myproposal.h packet.c packet.h pathnames.h readconf.c] [ssh-add.1 ssh-add.c ssh-agent.1 ssh-agent.c ssh-keygen.1 ssh-keygen.c] [ssh-keyscan.1 ssh-keyscan.c ssh-keysign.8 ssh.1 ssh.c ssh2.h] [ssh_config.5 sshconnect.c sshconnect2.c sshd.8 sshd.c sshd_config.5] [uuencode.c uuencode.h bufec.c kexecdh.c kexecdhc.c kexecdhs.c ssh-ecdsa.c] Implement Elliptic Curve Cryptography modes for key exchange (ECDH) and host/user keys (ECDSA) as specified by RFC5656. ECDH and ECDSA offer better performance than plain DH and DSA at the same equivalent symmetric key length, as well as much shorter keys. Only the mandatory sections of RFC5656 are implemented, specifically the three REQUIRED curves nistp256, nistp384 and nistp521 and only ECDH and ECDSA. Point compression (optional in RFC5656 is NOT implemented). Certificate host and user keys using the new ECDSA key types are supported. Note that this code has not been tested for interoperability and may be subject to change. feedback and ok markus@
2010-08-05 - djm@cvs.openbsd.org 2010/08/04 05:40:39Damien Miller
[PROTOCOL.certkeys ssh-keygen.c] tighten the rules for certificate encoding by requiring that options appear in lexical order and make our ssh-keygen comply. ok markus@
2010-05-21 - djm@cvs.openbsd.org 2010/05/20 23:46:02Damien Miller
[PROTOCOL.certkeys auth-options.c ssh-keygen.c] Move the permit-* options to the non-critical "extensions" field for v01 certificates. The logic is that if another implementation fails to implement them then the connection just loses features rather than fails outright. ok markus@
2010-05-10 - djm@cvs.openbsd.org 2010/05/01 02:50:50Damien Miller
[PROTOCOL.certkeys] typo; jmeltzer@
2010-04-16 - djm@cvs.openbsd.org 2010/04/16 01:47:26Damien Miller
[PROTOCOL.certkeys auth-options.c auth-options.h auth-rsa.c] [auth2-pubkey.c authfd.c key.c key.h myproposal.h ssh-add.c] [ssh-agent.c ssh-dss.c ssh-keygen.1 ssh-keygen.c ssh-rsa.c] [sshconnect.c sshconnect2.c sshd.c] revised certificate format ssh-{dss,rsa}-cert-v01@openssh.com with the following changes: move the nonce field to the beginning of the certificate where it can better protect against chosen-prefix attacks on the signature hash Rename "constraints" field to "critical options" Add a new non-critical "extensions" field Add a serial number The older format is still support for authentication and cert generation (use "ssh-keygen -t v00 -s ca_key ..." to generate a v00 certificate) ok markus@
2010-03-04 - djm@cvs.openbsd.org 2010/03/03 22:50:40Damien Miller
[PROTOCOL.certkeys] s/similar same/similar/; from imorgan AT nas.nasa.gov
2010-03-03 - (djm) [PROTOCOL.certkeys] Add RCS IdentDamien Miller
2010-02-27 - OpenBSD CVS SyncDamien Miller
- 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@