Avoid malloc(0) in EVP_PKEY_CTX_set1_hkdf_key()

ok jsing

diff --git a/lib/libcrypto/kdf/hkdf_evp.c b/lib/libcrypto/kdf/hkdf_evp.c
index b334c4a..dd79665 100644 (file)
--- a/lib/libcrypto/kdf/hkdf_evp.c
+++ b/lib/libcrypto/kdf/hkdf_evp.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: hkdf_evp.c,v 1.16 2022/05/05 19:44:23 tb Exp $ */
+/*     $OpenBSD: hkdf_evp.c,v 1.17 2022/05/05 19:46:36 tb Exp $ */
 /* ====================================================================
  * Copyright (c) 2016-2018 The OpenSSL Project.  All rights reserved.
  *
@@ -132,7 +132,7 @@ pkey_hkdf_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
                return 1;
 
        case EVP_PKEY_CTRL_HKDF_KEY:
-               if (p1 < 0)
+               if (p1 <= 0)
                        return 0;
 
                if (kctx->key != NULL)