path: root/sshkey.h
AgeCommit message (Collapse)Author
2020-08-27upstream: support for user-verified FIDO
FIDO2 supports a notion of "user verification" where the user is required to demonstrate their identity to the token before particular operations (e.g. signing). Typically this is done by authenticating themselves using a PIN that has been set on the token. This adds support for generating and using user verified keys where the verification happens via PIN (other options might be added in the future, but none are in common use now). Practically, this adds another key generation option "verify-required" that yields a key that requires a PIN before each authentication. feedback markus@ and Pedro Martelletto; ok markus@ OpenBSD-Commit-ID: 57fd461e4366f87c47502c5614ec08573e6d6a15
2020-04-08upstream: add sshkey_parse_pubkey_from_private_fileblob_type()
Extracts a public key from the unencrypted envelope of a new-style OpenSSH private key. ok markus@ OpenBSD-Commit-ID: 44d7ab446e5e8c686aee96d5897b26b3939939aa
2019-12-30upstream: SK API and sk-helper error/PIN
Allow passing a PIN via the SK API (API major crank) and let the ssh-sk-helper API follow. Also enhance the ssh-sk-helper API to support passing back an error code instead of a complete reply. Will be used to signal "wrong PIN", etc. feedback and ok markus@ OpenBSD-Commit-ID: a1bd6b0a2421646919a0c139b8183ad76d28fb71
2019-12-30upstream: implement loading of resident keys in
feedback and ok markus@ OpenBSD-Commit-ID: b273c23769ea182c55c4a7b8f9cbd9181722011a
2019-12-14upstream: perform security key enrollment via ssh-sk-helper
This means that ssh-keygen no longer needs to link against ssh-sk-helper, and only ssh-sk-helper needs libfido2 and /dev/uhid* access; feedback & ok markus@ OpenBSD-Commit-ID: 9464233fab95708d2ff059f8bee29c0d1f270800
2019-12-14upstream: use ssh-sk-helper for all security key signing
This extracts and refactors the client interface for ssh-sk-helper from ssh-agent and generalises it for use by the other programs. This means that most OpenSSH tools no longer need to link against libfido2 or directly interact with /dev/uhid* requested by, feedback and ok markus@ OpenBSD-Commit-ID: 1abcd3aea9a7460eccfbf8ca154cdfa62f1dc93f
2019-11-25upstream: Add new structure for signature
This is populated during signature verification with additional fields that are present in and covered by the signature. At the moment, it is only used to record security key-specific options, especially the flags field. with and ok markus@ OpenBSD-Commit-ID: 338a1f0e04904008836130bedb9ece4faafd4e49
2019-11-15upstream: fix shield/unshield for xmss keys: - in ssh-agent we
to delay the call to shield until we have received key specific options. - when serializing xmss keys for shield we need to deal with all optional components (e.g. state might not be loaded). ok djm@ OpenBSD-Commit-ID: cc2db82524b209468eb176d6b4d6b9486422f41f
2019-11-13upstream: enable ed25519 support; ok
OpenBSD-Commit-ID: 1a399c5b3ef15bd8efb916110cf5a9e0b554ab7e
2019-11-13upstream: implement ssh-ed25519-sk verification; ok
OpenBSD-Commit-ID: 37906d93948a1e3d237c20e713d6ca8fbf7d13f6
2019-11-01upstream: Refactor signing - use sshkey_sign for everything,
including the new U2F signatures. Don't use sshsk_ecdsa_sign() directly, instead make it reachable via sshkey_sign() like all other signature operations. This means that we need to add a provider argument to sshkey_sign(), so most of this change is mechanically adding that. Suggested by / ok markus@ OpenBSD-Commit-ID: d5193a03fcfa895085d91b2b83d984a9fde76c8c
2019-11-01upstream: Initial infrastructure for U2F/FIDO
Key library support: including allocation, marshalling public/private keys and certificates, signature validation. feedback & ok markus@ OpenBSD-Commit-ID: a17615ba15e0f7932ac4360cb18fc9a9544e68c7
2019-09-03upstream: make get_sigtype public as sshkey_get_sigtype();
markus@ OpenBSD-Commit-ID: 01f8cdbec63350490d2249f41112c5780d1cfbb8
2019-07-15upstream: support PKCS8 as an optional format for storage
private keys, enabled via "ssh-keygen -m PKCS8" on operations that save private keys to disk. The OpenSSH native key format remains the default, but PKCS8 is a superior format to PEM if interoperability with non-OpenSSH software is required, as it may use a less terrible KDF (IIRC PEM uses a single round of MD5 as a KDF). adapted from patch by Jakub Jelen via bz3013; ok markus OpenBSD-Commit-ID: 027824e3bc0b1c243dc5188504526d73a55accb1
2019-06-21upstream: Add protection for private keys at rest in RAM
speculation and memory sidechannel attacks like Spectre, Meltdown, Rowhammer and Rambleed. This change encrypts private keys when they are not in use with a symmetic key that is derived from a relatively large "prekey" consisting of random data (currently 16KB). Attackers must recover the entire prekey with high accuracy before they can attempt to decrypt the shielded private key, but the current generation of attacks have bit error rates that, when applied cumulatively to the entire prekey, make this unlikely. Implementation-wise, keys are encrypted "shielded" when loaded and then automatically and transparently unshielded when used for signatures or when being saved/serialised. Hopefully we can remove this in a few years time when computer architecture has become less unsafe. been in snaps for a bit already; thanks deraadt@ ok dtucker@ deraadt@ OpenBSD-Commit-ID: 19767213c312e46f94b303a512ef8e9218a39bd4
2019-01-21upstream: add support for ECDSA keys in PKCS#11
Work by markus@ and Pedro Martelletto, feedback and ok me@ OpenBSD-Commit-ID: a37d651e221341376636056512bddfc16efb4424
2018-09-14upstream: garbage-collect moribund ssh_new_private()
OpenBSD-Commit-ID: 7c05bf13b094093dfa01848a9306c82eb6e95f6c
2018-09-13upstream: hold our collective noses and use the openssl-1.1.x API
OpenSSH; feedback and ok tb@ jsing@ markus@ OpenBSD-Commit-ID: cacbcac87ce5da0d3ca7ef1b38a6f7fb349e4417
2018-09-12upstream: add sshkey_check_cert_sigtype() that checks
cert->signature_type against a supplied whitelist; ok markus OpenBSD-Commit-ID: caadb8073292ed7a9535e5adc067d11d356d9302
2018-09-12upstream: add cert->signature_type field and keep it in sync
certificate signature wrt loading and certification operations; ok markus@ OpenBSD-Commit-ID: e8b8b9f76b66707a0cd926109c4383db8f664df3
2018-07-03upstream: some finesse to fix RSA-SHA2 certificate
for certs hosted in ssh-agent OpenBSD-Commit-ID: e5fd5edd726137dda2d020e1cdebc464110a010f
2018-07-03upstream: Improve strictness and control over RSA-SHA2
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 "" and "" to force use of RSA-SHA2 signatures with certificate keys. feedback and ok markus@ OpenBSD-Commit-ID: c6e9f6d45eed8962ad502d315d7eaef32c419dde
2018-02-27Check for attributes on prototype args.Darren Tucker
Some compilers (gcc 2.9.53, 3.0 and probably others, see gcc bug #3481) do not accept __attribute__ on function pointer prototype args. Check for this and hide them if they're not accepted.
2018-02-26upstream: Add experimental support for PQC XMSS keys (
Hash-Based Signatures) The code is not compiled in by default (see WITH_XMSS in Joint work with stefan-lukas_gazdag at See ok djm@ OpenBSD-Commit-ID: ef3eccb96762a5d6f135d7daeef608df7776a7ac
pass negotiated signing algorithm though to sshkey_verify() and check that the negotiated algorithm matches the type in the signature (only matters for RSA SHA1/SHA2 sigs). ok markus@ OpenBSD-Commit-ID: 735fb15bf4adc060d3bee9d047a4bcaaa81b1af9
sshkey_sigtype() function to return the type of a signature; ok markus@ OpenBSD-Commit-ID: d3772b065ad6eed97285589bfb544befed9032e8
remove post-SSHv1 removal dead code from rsa.c and merge the remaining bit that it still used into ssh-rsa.c; ok markus Upstream-ID: ac8a048d24dcd89594b0052ea5e3404b473bfa2f
Allow ssh-keygen to use a key held in ssh-agent as a CA when signing certificates. bz#2377 ok markus Upstream-ID: fb42e920b592edcbb5b50465739a867c09329c8f
missing prototype. Upstream-ID: f443d2be9910fd2165a0667956d03343c46f66c9
Refuse RSA keys <1024 bits in length. Improve reporting for keys that do not meet this requirement. ok markus@ Upstream-ID: b385e2a7b13b1484792ee681daaf79e1e203df6c
remove miscellaneous SSH1 leftovers; ok markus@ Upstream-ID: af23696022ae4d45a1abc2fb8b490d8d9dd63b7c
remove KEY_RSA1 ok markus@ Upstream-ID: 7408517b077c892a86b581e19f82a163069bf133
fix regression in 7.4 server-sig-algs, where we were accidentally excluding SHA2 RSA signature methods. bz#2680, patch from Nuno Goncalves; ok dtucker@ Upstream-ID: 81ac8bfb30960447740b9b8f6a214dcf322f12e8
list all supported signature algorithms in the server-sig-algs Reported by mb AT in bz#2547 and (independantly) Ron Frederick; ok markus@ Upstream-ID: ddf702d721f54646b11ef2cee6d916666cb685cd
support SHA256 and SHA512 RSA signatures in certificates; ok markus@ Upstream-ID: b45be2f2ce8cacd794dc5730edaabc90e5eb434a
implement SHA2-{256,512} for RSASSA-PKCS1-v1_5 signatures (user and host auth) based on draft-rsa-dsa-sha2-256-03.txt and draft-ssh-ext-info-04.txt; with & ok djm@ Upstream-ID: cf82ce532b2733e5c4b34bb7b7c94835632db309
move the certificate validity formatting code to sshkey.[ch] Upstream-ID: f05f7c78fab20d02ff1d5ceeda533ef52e8fe523
- Fix error message: passphrase needs to be at least 5 characters, not 4. - Remove unused function argument. - Remove two unnecessary variables. OK djm@ Upstream-ID: 13010c05bfa8b523da1c0dc19e81dd180662bc30
backout SSH_RSA_MINIMUM_MODULUS_SIZE increase for this release; problems spotted by sthen@ ok deraadt@ markus@ Upstream-ID: d0bd60dde9e8c3cd7030007680371894c1499822
another SSH_RSA_MINIMUM_MODULUS_SIZE that needed cranking Upstream-ID: 9d8826cafe96aab4ae8e2f6fd22800874b7ffef1
delete support for legacy v00 certificates; "sure" markus@ dtucker@ Upstream-ID: b5b9bb5f9202d09e88f912989d74928601b6636f
refactor: split base64 encoding of pubkey into its own sshkey_to_base64() function and out of sshkey_write(); ok markus@ Upstream-ID: 54fc38f5832e9b91028900819bda46c3959a0c1a
small refactor and add some convenience functions; ok markus
add sshd_config HostbasedAcceptedKeyTypes and PubkeyAcceptedKeyTypes options to allow sshd to control what public key types will be accepted. Currently defaults to all. Feedback & ok markus@
deprecate key_load_private_pem() and sshkey_load_private_pem() interfaces. Refactor the generic key loading API to not require pathnames to be specified (they weren't really used). Fixes a few other things en passant: Makes ed25519 keys work for hostbased authentication (ssh-keysign previously used the PEM-only routines). Fixes key comment regression bz#2306: key pathnames were being lost as comment fields. ok markus@
Add FingerprintHash option to control algorithm used for key fingerprints. Default changes from MD5 to SHA256 and format from hex to base64. Feedback and ok naddy@ markus@
2014-08-20 - (djm) [sshkey.h] Fix compilation when OpenSSL lacks ECCDamien Miller
2014-07-02 - 2014/06/24 01:13:21Damien Miller
[ auth-bsdauth.c auth-chall.c auth-options.c auth-rsa.c [auth2-none.c auth2-pubkey.c authfile.c authfile.h cipher-3des1.c [cipher-chachapoly.c cipher-chachapoly.h cipher.c cipher.h [digest-libc.c digest-openssl.c digest.h dns.c entropy.c hmac.h [hostfile.c key.c key.h krl.c monitor.c packet.c rsa.c rsa.h [ssh-add.c ssh-agent.c ssh-dss.c ssh-ecdsa.c ssh-ed25519.c [ssh-keygen.c ssh-pkcs11-client.c ssh-pkcs11-helper.c ssh-pkcs11.c [ssh-rsa.c sshbuf-misc.c sshbuf.h sshconnect.c sshconnect1.c [sshconnect2.c sshd.c sshkey.c sshkey.h [openbsd-compat/openssl-compat.c openbsd-compat/openssl-compat.h] New key API: refactor key-related functions to be more library-like, existing API is offered as a set of wrappers. with and ok markus@ Thanks also to Ben Hawkes, David Tomaschik, Ivan Fratric, Matthew Dempsky and Ron Bowes for a detailed review a few months ago. NB. This commit also removes portable OpenSSH support for OpenSSL <0.9.8e.