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upstream: improve error message when 'ssh-keygen -Y sign' is unable to

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load a private key; bz3429, reported by Adam Szkoda ok dtucker@

OpenBSD-Commit-ID: bb57b285e67bea536ef81b1055467be2fc380e74
This commit is contained in:
djm@openbsd.org 2022-05-08 22:58:35 +00:00 committed by Damien Miller
parent aa61fc82c6
commit cb010744cc
1 changed files with 13 additions and 6 deletions
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19
ssh-keygen.c
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@ -1,4 +1,4 @@
/* $OpenBSD: ssh-keygen.c,v 1.450 2022/03/18 02:32:22 djm Exp $ */
/* $OpenBSD: ssh-keygen.c,v 1.451 2022/05/08 22:58:35 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -2462,7 +2462,8 @@ load_sign_key(const char *keypath, const struct sshkey *pubkey)
char *privpath = xstrdup(keypath);
static const char * const suffixes[] = { "-cert.pub", ".pub", NULL };
struct sshkey *ret = NULL, *privkey = NULL;
int r;
int r, waspub = 0;
struct stat st;
/*
* If passed a public key filename, then try to locate the corresponding
@ -2477,11 +2478,17 @@ load_sign_key(const char *keypath, const struct sshkey *pubkey)
privpath[plen - slen] = '\0';
debug_f("%s looks like a public key, using private key "
"path %s instead", keypath, privpath);
waspub = 1;
}
if ((privkey = load_identity(privpath, NULL)) == NULL) {
error("Couldn't load identity %s", keypath);
goto done;
}
if (waspub && stat(privpath, &st) != 0 && errno == ENOENT)
fatal("No private key found for public key \"%s\"", keypath);
if ((r = sshkey_load_private(privpath, "", &privkey, NULL)) != 0 &&
(r != SSH_ERR_KEY_WRONG_PASSPHRASE)) {
debug_fr(r, "load private key \"%s\"", privpath);
fatal("No private key found for \"%s\"", privpath);
} else if (privkey == NULL)
privkey = load_identity(privpath, NULL);
if (!sshkey_equal_public(pubkey, privkey)) {
error("Public key %s doesn't match private %s",
keypath, privpath);