diff -urNp a/snmplib/keytools.c b/snmplib/keytools.c
--- a/snmplib/keytools.c	2018-11-26 14:48:35.967812631 +0100
+++ b/snmplib/keytools.c	2018-11-26 15:21:14.758817675 +0100
@@ -153,19 +153,21 @@ generate_Ku(const oid * hashtype, u_int
     ctx = EVP_MD_CTX_create();
 #else
     ctx = malloc(sizeof(*ctx));
-    EVP_MD_CTX_init(ctx);
+    if(!EVP_MD_CTX_init(ctx)){
+        QUITFUN(SNMPERR_GENERR, generate_Ku_quit);
+    }
 #endif
 #ifndef NETSNMP_DISABLE_MD5
     if (ISTRANSFORM(hashtype, HMACMD5Auth)) {
         if (!EVP_DigestInit(ctx, EVP_md5()))
             /* MD5 not supported */
-            return SNMPERR_GENERR;
+            QUITFUN(SNMPERR_GENERR, generate_Ku_quit);
     } else
 #endif
         if (ISTRANSFORM(hashtype, HMACSHA1Auth)) {
             if (!EVP_DigestInit(ctx, EVP_sha1()))
                 /* SHA1 not supported */
-                return SNMPERR_GENERR;
+                QUITFUN(SNMPERR_GENERR, generate_Ku_quit);
         } else {
             QUITFUN(SNMPERR_GENERR, generate_Ku_quit);
         }
diff -urNp a/snmplib/scapi.c b/snmplib/scapi.c
--- a/snmplib/scapi.c	2018-11-26 14:48:35.967812631 +0100
+++ b/snmplib/scapi.c	2018-11-26 15:12:19.296751273 +0100
@@ -498,7 +498,8 @@ sc_hash(const oid * hashtype, size_t has
 #endif
     if (!EVP_DigestInit(cptr, hashfn)) {
         /* requested hash function is not available */
-        return SNMPERR_SC_NOT_CONFIGURED;
+        rval = SNMPERR_SC_NOT_CONFIGURED;
+	goto sc_hash_type_quit;
     }
 
 /** pass the data */
@@ -507,6 +508,8 @@ sc_hash(const oid * hashtype, size_t has
 /** do the final pass */
     EVP_DigestFinal(cptr, MAC, &tmp_len);
     *MAC_len = tmp_len;
+
+sc_hash_type_quit:
 #ifdef HAVE_EVP_MD_CTX_DESTROY
     EVP_MD_CTX_destroy(cptr);
 #else