From: Selva Nair <selva.n...@gmail.com>
Reported-by: Arne Schwabe <a...@rfc2549.org>
Signed-off-by: Selva Nair <selva.n...@gmail.com>
---
src/openvpn/pkcs11_openssl.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/src/openvpn/pkcs11_openssl.c b/src/openvpn/pkcs11_openssl.c
index a82b4b32..c4f88816 100644
--- a/src/openvpn/pkcs11_openssl.c
+++ b/src/openvpn/pkcs11_openssl.c
@@ -89,7 +89,14 @@ set_pss_params(CK_RSA_PKCS_PSS_PARAMS *pss_params,
XKEY_SIGALG sigalg,
pss_params->mgf = mdtypes[i].mgf_id;
/* determine salt length */
- int mdsize = EVP_MD_size(EVP_get_digestbyname(sigalg.mdname));
+ const EVP_MD *md = EVP_get_digestbyname(sigalg.mdname);
+ if (!md)
+ {
+ msg(M_WARN, "WARN: set_pss_params: EVP_get_digestbyname returned NULL "
+ "for mdname = <%s>", sigalg.mdname);
+ goto cleanup;
+ }
+ int mdsize = EVP_MD_get_size(md);
int saltlen = -1;
if (!strcmp(sigalg.saltlen, "digest")) /* same as digest size */
--
2.30.2
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