diff options
| author | Damien Miller <djm@cvs.openbsd.org> | 2010-02-26 20:29:55 +0000 |
|---|---|---|
| committer | Damien Miller <djm@cvs.openbsd.org> | 2010-02-26 20:29:55 +0000 |
| commit | 30ff2be0d9e083583c76524b4c0b3f51263ff251 (patch) | |
| tree | 813b368b824f5a65ce2436f896735a485904d1d9 /usr.bin/ssh/ssh-agent.c | |
| parent | 2cbfa260b3daf3a0f015bcc5fffabcede8d70c06 (diff) | |
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 trusted in ~/.ssh/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@
Diffstat (limited to 'usr.bin/ssh/ssh-agent.c')
| -rw-r--r-- | usr.bin/ssh/ssh-agent.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/usr.bin/ssh/ssh-agent.c b/usr.bin/ssh/ssh-agent.c index 5e586a87585..c4e5a770c43 100644 --- a/usr.bin/ssh/ssh-agent.c +++ b/usr.bin/ssh/ssh-agent.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh-agent.c,v 1.164 2010/02/09 00:50:36 djm Exp $ */ +/* $OpenBSD: ssh-agent.c,v 1.165 2010/02/26 20:29:54 djm Exp $ */ /* * Author: Tatu Ylonen <ylo@cs.hut.fi> * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland @@ -454,6 +454,8 @@ process_add_identity(SocketEntry *e, int version) int type, success = 0, death = 0, confirm = 0; char *type_name, *comment; Key *k = NULL; + u_char *cert; + u_int len; switch (version) { case 1: @@ -484,6 +486,14 @@ process_add_identity(SocketEntry *e, int version) buffer_get_bignum2(&e->request, k->dsa->pub_key); buffer_get_bignum2(&e->request, k->dsa->priv_key); break; + case KEY_DSA_CERT: + cert = buffer_get_string(&e->request, &len); + if ((k = key_from_blob(cert, len)) == NULL) + fatal("Certificate parse failed"); + xfree(cert); + key_add_private(k); + buffer_get_bignum2(&e->request, k->dsa->priv_key); + break; case KEY_RSA: k = key_new_private(type); buffer_get_bignum2(&e->request, k->rsa->n); @@ -496,6 +506,17 @@ process_add_identity(SocketEntry *e, int version) /* Generate additional parameters */ rsa_generate_additional_parameters(k->rsa); break; + case KEY_RSA_CERT: + cert = buffer_get_string(&e->request, &len); + if ((k = key_from_blob(cert, len)) == NULL) + fatal("Certificate parse failed"); + xfree(cert); + key_add_private(k); + buffer_get_bignum2(&e->request, k->rsa->d); + buffer_get_bignum2(&e->request, k->rsa->iqmp); + buffer_get_bignum2(&e->request, k->rsa->p); + buffer_get_bignum2(&e->request, k->rsa->q); + break; default: buffer_clear(&e->request); goto send; @@ -505,6 +526,7 @@ process_add_identity(SocketEntry *e, int version) /* enable blinding */ switch (k->type) { case KEY_RSA: + case KEY_RSA_CERT: case KEY_RSA1: if (RSA_blinding_on(k->rsa, NULL) != 1) { error("process_add_identity: RSA_blinding_on failed"); |