update set_ctx_param MAC calls to return 1 for a NULL params

Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/14383)

providers/implementations/macs/blake2_mac_impl.c

@@ -185,6 +185,9 @@ static int blake2_mac_set_ctx_params(void *vmacctx, const OSSL_PARAM params[])
     struct blake2_mac_data_st *macctx = vmacctx;
     const OSSL_PARAM *p;
 
+    if (params == NULL)
+        return 1;
+
     if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) != NULL) {
         size_t size;
 

providers/implementations/macs/cmac_prov.c

@@ -184,6 +184,9 @@ static int cmac_set_ctx_params(void *vmacctx, const OSSL_PARAM params[])
     OSSL_LIB_CTX *ctx = PROV_LIBCTX_OF(macctx->provctx);
     const OSSL_PARAM *p;
 
+    if (params == NULL)
+        return 1;
+
     if (!ossl_prov_cipher_load_from_params(&macctx->cipher, params, ctx))
         return 0;
 

providers/implementations/macs/hmac_prov.c

@@ -294,6 +294,9 @@ static int hmac_set_ctx_params(void *vmacctx, const OSSL_PARAM params[])
     const OSSL_PARAM *p;
     int flags = 0;
 
+    if (params == NULL)
+        return 1;
+
     if (!ossl_prov_digest_load_from_params(&macctx->digest, params, ctx))
         return 0;
 

providers/implementations/macs/kmac_prov.c

@@ -379,6 +379,9 @@ static int kmac_set_ctx_params(void *vmacctx, const OSSL_PARAM *params)
     struct kmac_data_st *kctx = vmacctx;
     const OSSL_PARAM *p;
 
+    if (params == NULL)
+        return 1;
+
     if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_XOF)) != NULL
         && !OSSL_PARAM_get_int(p, &kctx->xof_mode))
         return 0;

providers/implementations/macs/siphash_prov.c

@@ -195,6 +195,9 @@ static int siphash_set_params(void *vmacctx, const OSSL_PARAM *params)
     const OSSL_PARAM *p = NULL;
     size_t size;
 
+    if (params == NULL)
+        return 1;
+
     if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) != NULL) {
         if (!OSSL_PARAM_get_size_t(p, &size)
             || !SipHash_set_hash_size(&ctx->siphash, size))