Title: Microsoft PPP CHAP Extensions, Version 2
Author(s): G. Zorn.
Status: INFORMATIONAL
Date: Jan 2000
Length: 34178
The Point-to-Point Protocol (PPP) [1] provides a standard method for transporting multi-protocol datagrams over point-to-point links. PPP defines an extensible Link Control Protocol and a family of Network Control Protocols (NCPs) for establishing and configuring different network-layer protocols.
This document describes version two of Microsoft's PPP CHAP dialect (MS-CHAP-V2). MS-CHAP-V2 is similar to, but incompatible with, MS- CHAP version one (MS-CHAP-V1, described in [9]). In particular, certain protocol fields have been deleted or reused but with different semantics. In addition, MS-CHAP-V2 features mutual authentication.
The algorithms used in the generation of various MS-CHAP-V2 protocol fields are described in section 8. Negotiation and hash generation examples are provided in section 9.
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