ssl_util: fix memory leak

os is allocated with d2i_ASN1_OCTET_STRING and must
be released with ASN1_OCTET_STRING_free to avoid
leaking the internal buffer.

Fixes pkcs-keygen.int and pkcs-sign-verify.int tests on
opensuse-leap (clang)

Signed-off-by: Fabian Dubberke <fdub@posteo.de>

Author: fdub

src/lib/ssl_util.c

@@ -5,6 +5,7 @@
 #include <openssl/bn.h>
 #include <openssl/crypto.h>
 #include <openssl/ec.h>
+#include <openssl/asn1.h>
 #include <openssl/err.h>
 #include <openssl/evp.h>
 #include <openssl/rsa.h>
@@ -229,7 +230,7 @@ static CK_RV get_EC_evp_pubkey(CK_ATTRIBUTE_PTR ecparams, CK_ATTRIBUTE_PTR ecpoi
     }
 
 out:
-	OPENSSL_free(os);
+	ASN1_OCTET_STRING_free(os);
 	OSSL_PARAM_BLD_free(bld);
 	OSSL_PARAM_free(params);
 	EVP_PKEY_CTX_free(evp_ctx);