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upstream commit 

bring back r1.34 that was backed out for problems loading
public keys:

translate OpenSSL error codes to something more
meaninful; bz#2522 reported by Jakub Jelen, ok dtucker@

with additional fix from Jakub Jelen to solve the backout.
bz#2525 bz#2523 re-ok dtucker@

Upstream-ID: a9d5bc0306f4473d9b4f4484f880e95f3c1cc031
This commit is contained in:
djm@openbsd.org 2017-02-10 04:34:50 +00:00 committed by Damien Miller
parent a287c5ad1e
commit 155d540d00
1 changed files with 46 additions and 5 deletions
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51
sshkey.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: sshkey.c,v 1.41 2016/10/24 01:09:17 dtucker Exp $ */
/* $OpenBSD: sshkey.c,v 1.42 2017/02/10 04:34:50 djm Exp $ */
/*
* Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
* Copyright (c) 2008 Alexander von Gernler. All rights reserved.
@ -3786,7 +3786,44 @@ sshkey_parse_private_pem_fileblob(struct sshbuf *blob, int type,
if ((pk = PEM_read_bio_PrivateKey(bio, NULL, NULL,
(char *)passphrase)) == NULL) {
r = SSH_ERR_KEY_WRONG_PASSPHRASE;
unsigned long pem_err = ERR_peek_last_error();
int pem_reason = ERR_GET_REASON(pem_err);
/*
* Translate OpenSSL error codes to determine whether
* passphrase is required/incorrect.
*/
switch (ERR_GET_LIB(pem_err)) {
case ERR_LIB_PEM:
switch (pem_reason) {
case PEM_R_BAD_PASSWORD_READ:
case PEM_R_PROBLEMS_GETTING_PASSWORD:
case PEM_R_BAD_DECRYPT:
r = SSH_ERR_KEY_WRONG_PASSPHRASE;
goto out;
default:
r = SSH_ERR_INVALID_FORMAT;
goto out;
}
case ERR_LIB_EVP:
switch (pem_reason) {
case EVP_R_BAD_DECRYPT:
r = SSH_ERR_KEY_WRONG_PASSPHRASE;
goto out;
case EVP_R_BN_DECODE_ERROR:
case EVP_R_DECODE_ERROR:
case EVP_R_PRIVATE_KEY_DECODE_ERROR:
r = SSH_ERR_INVALID_FORMAT;
goto out;
default:
r = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
case ERR_LIB_ASN1:
r = SSH_ERR_INVALID_FORMAT;
goto out;
}
r = SSH_ERR_LIBCRYPTO_ERROR;
goto out;
}
if (pk->type == EVP_PKEY_RSA &&
@ -3860,6 +3897,8 @@ int
sshkey_parse_private_fileblob_type(struct sshbuf *blob, int type,
const char *passphrase, struct sshkey **keyp, char **commentp)
{
int r = SSH_ERR_INTERNAL_ERROR;
if (keyp != NULL)
*keyp = NULL;
if (commentp != NULL)
@ -3882,9 +3921,11 @@ sshkey_parse_private_fileblob_type(struct sshbuf *blob, int type,
return sshkey_parse_private2(blob, type, passphrase,
keyp, commentp);
case KEY_UNSPEC:
if (sshkey_parse_private2(blob, type, passphrase, keyp,
commentp) == 0)
return 0;
r = sshkey_parse_private2(blob, type, passphrase, keyp,
commentp);
/* Do not fallback to PEM parser if only passphrase is wrong. */
if (r == 0 || r == SSH_ERR_KEY_WRONG_PASSPHRASE)
return r;
#ifdef WITH_OPENSSL
return sshkey_parse_private_pem_fileblob(blob, type,
passphrase, keyp);