2.2.3.2.3.4.4 AuthTransformConstant

The AuthTransformConstant registry value specifies the hash algorithm to be negotiated during QM SA negotiation [RFC4306]. This value MUST be of type REG_DWORD. Allowed values for this registry value are the same as those for dwAuthTransformConstant in ROUTER_CUSTOM_IKEv2_POLICY_0. If the value is not specified for this registry value, or if this registry value is not present, the default value AUTH_CONFIG_HMAC_SHA_256_128 (0x2) is assumed.