Supported encryption modes appear in the Mode section of TDGSS Legal Values in the following default xml form:
<Mode
NONE="0"
CBC="1"
CFB="2"
ECB="3"
OFB="4"
GCM="5"
CCM="6"
CTR="7">
</Mode>
The numbers associated with each mode type are used by the underlying mechanism code to represent the represent the mode type.