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- djm@cvs.openbsd.org 2010/08/04 06:07:11 

[ssh-keygen.1 ssh-keygen.c]
     Support CA keys in PKCS#11 tokens; feedback and ok markus@
This commit is contained in:
Damien Miller 2010-08-05 13:05:31 +10:00
parent 5458c4dd13
commit 757f34e051
3 changed files with 66 additions and 13 deletions
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3
ChangeLog
View File

@ -19,6 +19,9 @@
commited the wrong version of the hostbased certificate diff; this
version replaces some strlc{py,at} verbosity with xasprintf() at
the request of markus@
- djm@cvs.openbsd.org 2010/08/04 06:07:11
[ssh-keygen.1 ssh-keygen.c]
Support CA keys in PKCS#11 tokens; feedback and ok markus@
20100903
- (dtucker) [monitor.c] Bug #1795: Initialize the values to be returned from

21
ssh-keygen.1
View File

@ -1,4 +1,4 @@
.\" $OpenBSD: ssh-keygen.1,v 1.97 2010/07/15 21:20:38 schwarze Exp $
.\" $OpenBSD: ssh-keygen.1,v 1.98 2010/08/04 06:07:11 djm Exp $
.\"
.\" -*- nroff -*-
.\"
@ -37,7 +37,7 @@
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd $Mdocdate: July 15 2010 $
.Dd $Mdocdate: August 4 2010 $
.Dt SSH-KEYGEN 1
.Os
.Sh NAME
@ -215,6 +215,11 @@ the passphrase if the key has one, and for the new comment.
.It Fl D Ar pkcs11
Download the RSA public keys provided by the PKCS#11 shared library
.Ar pkcs11 .
When used in combination with
.Fl s ,
this option indicates that a CA key resides in a PKCS#11 token (see the
.Sx CERTIFICATES
section for details).
.It Fl e
This option will read a private or public OpenSSH key file and
print to stdout the key in one of the formats specified by the
@ -553,7 +558,17 @@ option:
.Pp
The host certificate will be output to
.Pa /path/to/host_key-cert.pub .
In both cases,
.Pp
It is possible to sign using a CA key stored in a PKCS#11 token by
providing the token library using
.Fl D
and identifying the CA key by providing its public half as an argument
to
.Fl s :
.Pp
.Dl $ ssh-keygen -s ca_key.pub -D libpkcs11.so -I key_id host_key.pub
.Pp
In all cases,
.Ar key_id
is a "key identifier" that is logged by the server when the certificate
is used for authentication.

55
ssh-keygen.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh-keygen.c,v 1.196 2010/08/04 05:40:39 djm Exp $ */
/* $OpenBSD: ssh-keygen.c,v 1.197 2010/08/04 06:07:11 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -146,6 +146,8 @@ int print_generic = 0;
char *key_type_name = NULL;
/* Load key from this PKCS#11 provider */
char *pkcs11provider = NULL;
/* argv0 */
extern char *__progname;
@ -655,7 +657,7 @@ do_print_public(struct passwd *pw)
}
static void
do_download(struct passwd *pw, char *pkcs11provider)
do_download(struct passwd *pw)
{
#ifdef ENABLE_PKCS11
Key **keys = NULL;
@ -1318,6 +1320,35 @@ prepare_options_buf(Buffer *c, int which)
add_string_option(c, "source-address", certflags_src_addr);
}
static Key *
load_pkcs11_key(char *path)
{
#ifdef ENABLE_PKCS11
Key **keys = NULL, *public, *private = NULL;
int i, nkeys;
if ((public = key_load_public(path, NULL)) == NULL)
fatal("Couldn't load CA public key \"%s\"", path);
nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase, &keys);
debug3("%s: %d keys", __func__, nkeys);
if (nkeys <= 0)
fatal("cannot read public key from pkcs11");
for (i = 0; i < nkeys; i++) {
if (key_equal_public(public, keys[i])) {
private = keys[i];
continue;
}
key_free(keys[i]);
}
xfree(keys);
key_free(public);
return private;
#else
fatal("no pkcs11 support");
#endif /* ENABLE_PKCS11 */
}
static void
do_ca_sign(struct passwd *pw, int argc, char **argv)
{
@ -1328,11 +1359,6 @@ do_ca_sign(struct passwd *pw, int argc, char **argv)
FILE *f;
int v00 = 0; /* legacy keys */
tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
if ((ca = load_identity(tmp)) == NULL)
fatal("Couldn't load CA key \"%s\"", tmp);
xfree(tmp);
if (key_type_name != NULL) {
switch (key_type_from_name(key_type_name)) {
case KEY_RSA_CERT_V00:
@ -1352,6 +1378,15 @@ do_ca_sign(struct passwd *pw, int argc, char **argv)
}
}
pkcs11_init(1);
tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
if (pkcs11provider != NULL) {
if ((ca = load_pkcs11_key(tmp)) == NULL)
fatal("No PKCS#11 key matching %s found", ca_key_path);
} else if ((ca = load_identity(tmp)) == NULL)
fatal("Couldn't load CA key \"%s\"", tmp);
xfree(tmp);
for (i = 0; i < argc; i++) {
/* Split list of principals */
n = 0;
@ -1424,6 +1459,7 @@ do_ca_sign(struct passwd *pw, int argc, char **argv)
key_free(public);
xfree(out);
}
pkcs11_terminate();
exit(0);
}
@ -1725,8 +1761,7 @@ int
main(int argc, char **argv)
{
char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2;
char out_file[MAXPATHLEN], *pkcs11provider = NULL;
char *rr_hostname = NULL;
char out_file[MAXPATHLEN], *rr_hostname = NULL;
Key *private, *public;
struct passwd *pw;
struct stat st;
@ -2001,7 +2036,7 @@ main(int argc, char **argv)
}
}
if (pkcs11provider != NULL)
do_download(pw, pkcs11provider);
do_download(pw);
if (do_gen_candidates) {
FILE *out = fopen(out_file, "w");