The MS-CHAP Password Management API uses the following constants.
Constant/value
Description
CYPHER_BLOCK_LENGTH
8
The defined length of the [CYPHER_BLOCK](/previous-versions/windows/desktop/api/MsChapp/ns-mschapp-_cypher_block) structure, in bytes.
[!Note]
The value of CYPHER_BLOCK_LENGTH is determined by the minimum number of bytes used by the Data Encryption Standard (DES) cipher in MS-CHAP password management.