upstream commit

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@
2025-03-09 16:18:04 +00:00 · 2015-01-08 10:14:08 +00:00 · 2015-01-08 10:14:08 +00:00 · 1195f4cb07
commit 1195f4cb07
parent febbe09e4e
10 changed files with 62 additions and 102 deletions
--- a/auth2-hostbased.c
+++ b/auth2-hostbased.c
@ -1,4 +1,4 @@
-/* $OpenBSD: auth2-hostbased.c,v 1.20 2014/12/23 22:42:48 djm Exp $ */
+/* $OpenBSD: auth2-hostbased.c,v 1.21 2015/01/08 10:14:08 djm Exp $ */
 /*
 * Copyright (c) 2000 Markus Friedl.  All rights reserved.
 *
@ -84,6 +84,7 @@ userauth_hostbased(Authctxt *authctxt)
 	buffer_dump(&b);
 	buffer_free(&b);
 #endif
+	/* XXX provide some way to allow admin to specify key types accepted */
 	pktype = key_type_from_name(pkalg);
 	if (pktype == KEY_UNSPEC) {
 		/* this is perfectly legal */
--- a/authfile.c
+++ b/authfile.c
@ -1,4 +1,4 @@
-/* $OpenBSD: authfile.c,v 1.108 2014/12/04 02:24:32 djm Exp $ */
+/* $OpenBSD: authfile.c,v 1.109 2015/01/08 10:14:08 djm Exp $ */
 /*
 * Copyright (c) 2000, 2013 Markus Friedl.  All rights reserved.
 *
@ -95,7 +95,7 @@ sshkey_save_private(struct sshkey *key, const char *filename,

 /* Load a key from a fd into a buffer */
 int
-sshkey_load_file(int fd, const char *filename, struct sshbuf *blob)
+sshkey_load_file(int fd, struct sshbuf *blob)
 {
 	u_char buf[1024];
 	size_t len;
@ -142,8 +142,7 @@ sshkey_load_file(int fd, const char *filename, struct sshbuf *blob)
 * otherwise.
 */
 static int
-sshkey_load_public_rsa1(int fd, const char *filename,
-    struct sshkey **keyp, char **commentp)
+sshkey_load_public_rsa1(int fd, struct sshkey **keyp, char **commentp)
 {
 	struct sshbuf *b = NULL;
 	int r;
@ -154,7 +153,7 @@ sshkey_load_public_rsa1(int fd, const char *filename,

 	if ((b = sshbuf_new()) == NULL)
 		return SSH_ERR_ALLOC_FAIL;
-	if ((r = sshkey_load_file(fd, filename, b)) != 0)
+	if ((r = sshkey_load_file(fd, b)) != 0)
 		goto out;
 	if ((r = sshkey_parse_public_rsa1_fileblob(b, keyp, commentp)) != 0)
 		goto out;
@ -165,33 +164,6 @@ sshkey_load_public_rsa1(int fd, const char *filename,
 }
 #endif /* WITH_SSH1 */

-#ifdef WITH_OPENSSL
-/* XXX Deprecate? */
-int
-sshkey_load_private_pem(int fd, int type, const char *passphrase,
-    struct sshkey **keyp, char **commentp)
-{
-	struct sshbuf *buffer = NULL;
-	int r;
-
-	*keyp = NULL;
-	if (commentp != NULL)
-		*commentp = NULL;
-
-	if ((buffer = sshbuf_new()) == NULL)
-		return SSH_ERR_ALLOC_FAIL;
-	if ((r = sshkey_load_file(fd, NULL, buffer)) != 0)
-		goto out;
-	if ((r = sshkey_parse_private_pem_fileblob(buffer, type, passphrase,
-	    keyp, commentp)) != 0)
-		goto out;
-	r = 0;
- out:
-	sshbuf_free(buffer);
-	return r;
-}
-#endif /* WITH_OPENSSL */
-
 /* XXX remove error() calls from here? */
 int
 sshkey_perm_ok(int fd, const char *filename)
@ -227,7 +199,6 @@ sshkey_load_private_type(int type, const char *filename, const char *passphrase,
    struct sshkey **keyp, char **commentp, int *perm_ok)
 {
 	int fd, r;
-	struct sshbuf *buffer = NULL;

 	*keyp = NULL;
 	if (commentp != NULL)
@ -247,18 +218,31 @@ sshkey_load_private_type(int type, const char *filename, const char *passphrase,
 	if (perm_ok != NULL)
 		*perm_ok = 1;

+	r = sshkey_load_private_type_fd(fd, type, passphrase, keyp, commentp);
+ out:
+	close(fd);
+	return r;
+}
+
+int
+sshkey_load_private_type_fd(int fd, int type, const char *passphrase,
+    struct sshkey **keyp, char **commentp)
+{
+	struct sshbuf *buffer = NULL;
+	int r;
+
 	if ((buffer = sshbuf_new()) == NULL) {
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
-	if ((r = sshkey_load_file(fd, filename, buffer)) != 0)
-		goto out;
-	if ((r = sshkey_parse_private_fileblob_type(buffer, type, passphrase,
-	    keyp, commentp)) != 0)
+	if ((r = sshkey_load_file(fd, buffer)) != 0 ||
+	    (r = sshkey_parse_private_fileblob_type(buffer, type,
+	    passphrase, keyp, commentp)) != 0)
 		goto out;
+
+	/* success */
 	r = 0;
 out:
-	close(fd);
 	if (buffer != NULL)
 		sshbuf_free(buffer);
 	return r;
@ -287,7 +271,7 @@ sshkey_load_private(const char *filename, const char *passphrase,
 		r = SSH_ERR_ALLOC_FAIL;
 		goto out;
 	}
-	if ((r = sshkey_load_file(fd, filename, buffer)) != 0 ||
+	if ((r = sshkey_load_file(fd, buffer)) != 0 ||
 	    (r = sshkey_parse_private_fileblob(buffer, passphrase, filename,
 	    keyp, commentp)) != 0)
 		goto out;
@ -363,7 +347,7 @@ sshkey_load_public(const char *filename, struct sshkey **keyp, char **commentp)
 		goto skip;
 #ifdef WITH_SSH1
 	/* try rsa1 private key */
-	r = sshkey_load_public_rsa1(fd, filename, keyp, commentp);
+	r = sshkey_load_public_rsa1(fd, keyp, commentp);
 	close(fd);
 	switch (r) {
 	case SSH_ERR_INTERNAL_ERROR:
--- a/authfile.h
+++ b/authfile.h
@ -1,4 +1,4 @@
-/* $OpenBSD: authfile.h,v 1.20 2014/12/04 02:24:32 djm Exp $ */
+/* $OpenBSD: authfile.h,v 1.21 2015/01/08 10:14:08 djm Exp $ */

 /*
 * Copyright (c) 2000, 2013 Markus Friedl.  All rights reserved.
@ -30,9 +30,12 @@
 struct sshbuf;
 struct sshkey;

+/* XXX document these */
+/* XXX some of these could probably be merged/retired */
+
 int sshkey_save_private(struct sshkey *, const char *,
    const char *, const char *, int, const char *, int);
-int sshkey_load_file(int, const char *, struct sshbuf *);
+int sshkey_load_file(int, struct sshbuf *);
 int sshkey_load_cert(const char *, struct sshkey **);
 int sshkey_load_public(const char *, struct sshkey **, char **);
 int sshkey_load_private(const char *, const char *, struct sshkey **, char **);
@ -40,7 +43,8 @@ int sshkey_load_private_cert(int, const char *, const char *,
    struct sshkey **, int *);
 int sshkey_load_private_type(int, const char *, const char *,
    struct sshkey **, char **, int *);
-int sshkey_load_private_pem(int, int, const char *, struct sshkey **, char **);
+int sshkey_load_private_type_fd(int fd, int type, const char *passphrase,
+    struct sshkey **keyp, char **commentp);
 int sshkey_perm_ok(int, const char *);
 int sshkey_in_file(struct sshkey *, const char *, int, int);
 int sshkey_check_revoked(struct sshkey *key, const char *revoked_keys_file);
--- a/key.c
+++ b/key.c
@ -1,4 +1,4 @@
-/* $OpenBSD: key.c,v 1.124 2014/12/21 22:27:56 djm Exp $ */
+/* $OpenBSD: key.c,v 1.125 2015/01/08 10:14:08 djm Exp $ */
 /*
 * placed in the public domain
 */
@ -328,7 +328,7 @@ key_load_file(int fd, const char *filename, struct sshbuf *blob)
 {
 	int r;

-	if ((r = sshkey_load_file(fd, filename, blob)) != 0) {
+	if ((r = sshkey_load_file(fd, blob)) != 0) {
 		fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR);
 		error("%s: %s", __func__, ssh_err(r));
 		return 0;
@ -435,27 +435,6 @@ key_load_private_type(int type, const char *filename, const char *passphrase,
 	return ret;
 }

-#ifdef WITH_OPENSSL
-Key *
-key_load_private_pem(int fd, int type, const char *passphrase,
-    char **commentp)
-{
-	int r;
-	Key *ret = NULL;
-
-	if ((r = sshkey_load_private_pem(fd, type, passphrase,
-	     &ret, commentp)) != 0) {
-		fatal_on_fatal_errors(r, __func__, SSH_ERR_LIBCRYPTO_ERROR);
-		if (r == SSH_ERR_KEY_WRONG_PASSPHRASE)
-			debug("%s: %s", __func__, ssh_err(r));
-		else
-			error("%s: %s", __func__, ssh_err(r));
-		return NULL;
-	}
-	return ret;
-}
-#endif /* WITH_OPENSSL */
-
 int
 key_perm_ok(int fd, const char *filename)
 {
--- a/key.h
+++ b/key.h
@ -1,4 +1,4 @@
-/* $OpenBSD: key.h,v 1.44 2014/12/21 22:27:56 djm Exp $ */
+/* $OpenBSD: key.h,v 1.45 2015/01/08 10:14:08 djm Exp $ */

 /*
 * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
@ -104,7 +104,6 @@ Key	*key_load_public(const char *, char **);
 Key	*key_load_private(const char *, const char *, char **);
 Key	*key_load_private_cert(int, const char *, const char *, int *);
 Key	*key_load_private_type(int, const char *, const char *, char **, int *);
-Key	*key_load_private_pem(int, int, const char *, char **);
 int	 key_perm_ok(int, const char *);

 #endif
--- a/krl.c
+++ b/krl.c
@ -14,7 +14,7 @@
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

-/* $OpenBSD: krl.c,v 1.21 2014/12/21 22:27:56 djm Exp $ */
+/* $OpenBSD: krl.c,v 1.22 2015/01/08 10:14:08 djm Exp $ */

 #include "includes.h"

@ -1248,7 +1248,7 @@ ssh_krl_file_contains_key(const char *path, const struct sshkey *key)
 		oerrno = errno;
 		goto out;
 	}
-	if ((r = sshkey_load_file(fd, path, krlbuf)) != 0) {
+	if ((r = sshkey_load_file(fd, krlbuf)) != 0) {
 		oerrno = errno;
 		goto out;
 	}
--- a/ssh-keysign.c
+++ b/ssh-keysign.c
@ -1,4 +1,4 @@
-/* $OpenBSD: ssh-keysign.c,v 1.44 2014/12/21 22:27:56 djm Exp $ */
+/* $OpenBSD: ssh-keysign.c,v 1.45 2015/01/08 10:14:08 djm Exp $ */
 /*
 * Copyright (c) 2002 Markus Friedl.  All rights reserved.
 *
@ -52,6 +52,8 @@
 #include "pathnames.h"
 #include "readconf.h"
 #include "uidswap.h"
+#include "sshkey.h"
+#include "ssherr.h"

 /* XXX readconf.c needs these */
 uid_t original_real_uid;
@ -69,6 +71,8 @@ valid_request(struct passwd *pw, char *host, Key **ret, u_char *data,
 	char *pkalg, *p;
 	int pktype, fail;

+	if (ret != NULL)
+		*ret = NULL;
 	fail = 0;

 	buffer_init(&b);
@ -153,7 +157,7 @@ main(int argc, char **argv)
 #define NUM_KEYTYPES 4
 	Key *keys[NUM_KEYTYPES], *key = NULL;
 	struct passwd *pw;
-	int key_fd[NUM_KEYTYPES], i, found, version = 2, fd;
+	int r, key_fd[NUM_KEYTYPES], i, found, version = 2, fd;
 	u_char *signature, *data;
 	char *host, *fp;
 	u_int slen, dlen;
@ -209,14 +213,15 @@ main(int argc, char **argv)
 		keys[i] = NULL;
 		if (key_fd[i] == -1)
 			continue;
-#ifdef WITH_OPENSSL
-/* XXX wrong api */
-		keys[i] = key_load_private_pem(key_fd[i], KEY_UNSPEC,
-		    NULL, NULL);
-#endif
+		r = sshkey_load_private_type_fd(key_fd[i], KEY_UNSPEC,
+		    NULL, &key, NULL);
 		close(key_fd[i]);
-		if (keys[i] != NULL)
+		if (r != 0)
+			debug("parse key %d: %s", i, ssh_err(r));
+		else if (key != NULL) {
+			keys[i] = key;
 			found = 1;
+		}
 	}
 	if (!found)
 		fatal("no hostkey found");
--- a/sshconnect2.c
+++ b/sshconnect2.c
@ -1,4 +1,4 @@
-/* $OpenBSD: sshconnect2.c,v 1.212 2014/12/21 22:27:56 djm Exp $ */
+/* $OpenBSD: sshconnect2.c,v 1.213 2015/01/08 10:14:08 djm Exp $ */
 /*
 * Copyright (c) 2000 Markus Friedl.  All rights reserved.
 * Copyright (c) 2008 Damien Miller.  All rights reserved.
@ -1489,6 +1489,8 @@ userauth_hostbased(Authctxt *authctxt)
 	u_int blen, slen;
 	int ok, i, found = 0;

+	/* XXX provide some way to allow user to specify key types attempted */
+
 	/* check for a useful key */
 	for (i = 0; i < sensitive->nkeys; i++) {
 		private = sensitive->keys[i];
--- a/sshkey.c
+++ b/sshkey.c
@ -1,4 +1,4 @@
-/* $OpenBSD: sshkey.c,v 1.7 2014/12/21 22:27:55 djm Exp $ */
+/* $OpenBSD: sshkey.c,v 1.8 2015/01/08 10:14:08 djm Exp $ */
 /*
 * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
 * Copyright (c) 2008 Alexander von Gernler.  All rights reserved.
@ -3719,20 +3719,16 @@ sshkey_parse_private_rsa1(struct sshbuf *blob, const char *passphrase,
 #endif /* WITH_SSH1 */

 #ifdef WITH_OPENSSL
-/* XXX make private once ssh-keysign.c fixed */
-int
+static int
 sshkey_parse_private_pem_fileblob(struct sshbuf *blob, int type,
-    const char *passphrase, struct sshkey **keyp, char **commentp)
+    const char *passphrase, struct sshkey **keyp)
 {
 	EVP_PKEY *pk = NULL;
 	struct sshkey *prv = NULL;
-	char *name = "<no key>";
 	BIO *bio = NULL;
 	int r;

 	*keyp = NULL;
-	if (commentp != NULL)
-		*commentp = NULL;

 	if ((bio = BIO_new(BIO_s_mem())) == NULL || sshbuf_len(blob) > INT_MAX)
 		return SSH_ERR_ALLOC_FAIL;
@ -3755,7 +3751,6 @@ sshkey_parse_private_pem_fileblob(struct sshbuf *blob, int type,
 		}
 		prv->rsa = EVP_PKEY_get1_RSA(pk);
 		prv->type = KEY_RSA;
-		name = "rsa w/o comment";
 #ifdef DEBUG_PK
 		RSA_print_fp(stderr, prv->rsa, 8);
 #endif
@ -3771,7 +3766,6 @@ sshkey_parse_private_pem_fileblob(struct sshbuf *blob, int type,
 		}
 		prv->dsa = EVP_PKEY_get1_DSA(pk);
 		prv->type = KEY_DSA;
-		name = "dsa w/o comment";
 #ifdef DEBUG_PK
 		DSA_print_fp(stderr, prv->dsa, 8);
 #endif
@ -3793,7 +3787,6 @@ sshkey_parse_private_pem_fileblob(struct sshbuf *blob, int type,
 			r = SSH_ERR_INVALID_FORMAT;
 			goto out;
 		}
-		name = "ecdsa w/o comment";
 # ifdef DEBUG_PK
 		if (prv != NULL && prv->ecdsa != NULL)
 			sshkey_dump_ec_key(prv->ecdsa);
@ -3803,11 +3796,6 @@ sshkey_parse_private_pem_fileblob(struct sshbuf *blob, int type,
 		r = SSH_ERR_INVALID_FORMAT;
 		goto out;
 	}
-	if (commentp != NULL &&
-	    (*commentp = strdup(name)) == NULL) {
-		r = SSH_ERR_ALLOC_FAIL;
-		goto out;
-	}
 	r = 0;
 	*keyp = prv;
 	prv = NULL;
@ -3839,8 +3827,8 @@ sshkey_parse_private_fileblob_type(struct sshbuf *blob, int type,
 	case KEY_DSA:
 	case KEY_ECDSA:
 	case KEY_RSA:
-		return sshkey_parse_private_pem_fileblob(blob, type, passphrase,
-		    keyp, commentp);
+		return sshkey_parse_private_pem_fileblob(blob, type,
+		    passphrase, keyp);
 #endif /* WITH_OPENSSL */
 	case KEY_ED25519:
 		return sshkey_parse_private2(blob, type, passphrase,
@ -3850,8 +3838,8 @@ sshkey_parse_private_fileblob_type(struct sshbuf *blob, int type,
 		    commentp)) == 0)
 			return 0;
 #ifdef WITH_OPENSSL
-		return sshkey_parse_private_pem_fileblob(blob, type, passphrase,
-		    keyp, commentp);
+		return sshkey_parse_private_pem_fileblob(blob, type,
+		    passphrase, keyp);
 #else
 		return SSH_ERR_INVALID_FORMAT;
 #endif /* WITH_OPENSSL */
--- a/sshkey.h
+++ b/sshkey.h
@ -1,4 +1,4 @@
-/* $OpenBSD: sshkey.h,v 1.2 2014/12/21 22:27:55 djm Exp $ */
+/* $OpenBSD: sshkey.h,v 1.3 2015/01/08 10:14:08 djm Exp $ */

 /*
 * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
@ -184,8 +184,6 @@ int	sshkey_private_to_fileblob(struct sshkey *key, struct sshbuf *blob,
    int force_new_format, const char *new_format_cipher, int new_format_rounds);
 int	sshkey_parse_public_rsa1_fileblob(struct sshbuf *blob,
    struct sshkey **keyp, char **commentp);
-int	sshkey_parse_private_pem_fileblob(struct sshbuf *blob, int type,
-    const char *passphrase, struct sshkey **keyp, char **commentp);
 int	sshkey_parse_private_fileblob(struct sshbuf *buffer,
    const char *passphrase, const char *filename, struct sshkey **keyp,
    char **commentp);