From 97f9b6e61316c97a32dad94b7a37daa9b5f6b836 Mon Sep 17 00:00:00 2001 From: "djm@openbsd.org" Date: Thu, 18 Nov 2021 21:11:01 +0000 Subject: [PATCH] upstream: avoid xmalloc(0) for PKCS#11 keyid for ECDSA keys (we already did this for RSA keys). Avoids fatal errors for PKCS#11 libraries that return empty keyid, e.g. Microchip ATECC608B "cryptoauthlib"; bz#3364 OpenBSD-Commit-ID: 054d4dc1d6a99a2e6f8eebc48207b534057c154d --- ssh-pkcs11.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/ssh-pkcs11.c b/ssh-pkcs11.c index 649a6d3b5..b2e2b32a5 100644 --- a/ssh-pkcs11.c +++ b/ssh-pkcs11.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ssh-pkcs11.c,v 1.54 2021/08/11 05:20:17 djm Exp $ */ +/* $OpenBSD: ssh-pkcs11.c,v 1.55 2021/11/18 21:11:01 djm Exp $ */ /* * Copyright (c) 2010 Markus Friedl. All rights reserved. * Copyright (c) 2014 Pedro Martelletto. All rights reserved. @@ -611,9 +611,10 @@ pkcs11_ecdsa_wrap(struct pkcs11_provider *provider, CK_ULONG slotidx, k11->slotidx = slotidx; /* identify key object on smartcard */ k11->keyid_len = keyid_attrib->ulValueLen; - k11->keyid = xmalloc(k11->keyid_len); - memcpy(k11->keyid, keyid_attrib->pValue, k11->keyid_len); - + if (k11->keyid_len > 0) { + k11->keyid = xmalloc(k11->keyid_len); + memcpy(k11->keyid, keyid_attrib->pValue, k11->keyid_len); + } EC_KEY_set_method(ec, ec_key_method); EC_KEY_set_ex_data(ec, ec_key_idx, k11);