Hi,
I think I found a bug in mpd 4.0b5. When setting up as a ppp server and
trying to connect via linux pppd I get the following chap login failure:
rcvd [CHAP Challenge id=0x1 <bb1e6825148f00432e1df51e2241c249>, name = ""]
sent [CHAP Response id=0x1
<71d5d079919f310e1a04a5a366c0d4b1b7c130e6b7c130e6f499db4880aa31ec08e20f720f83735396e8a0e2995fa4a700>,
name = "sebster"]
rcvd [LCP EchoRep id=0x0 magic=0x5bca9214]
rcvd [CHAP Success id=0x1 "S=4CA1E7ABF3CFD2FA11D335D0BCFFC061B5668D78"]
MS-CHAPv2 mutual authentication failed.
CHAP authentication failed
sent [LCP TermReq id=0x2 "Failed to authenticate ourselves to peer"]
The chap success packet has an incorrect incorrect response to the
challenge because it uses an uninitialized NT hash instead of the hash
derived from the shared secret. By changing line 520 of chap.c from
GenerateAuthenticatorResponse(a->params.msoft.nt_hash, pv->ntHash,
to
GenerateAuthenticatorResponse(secret, pv->ntHash,
this problem is resolved.
Note that this problem does not exist in 3.18: the same configuration
gives the following output:
rcvd [CHAP Challenge id=0x1 <bb1e68f7d2ab156f17163778cb1cf276>, name = ""]
sent [CHAP Response id=0x1
<4d2115e439d88648ba87ccc1a3e88c6ab7c190deb7c190de8fb276c4912736be46609e5d292b6a913997cc41333de19000>,
name = "sebster"]
rcvd [LCP EchoRep id=0x0 magic=0x411a984c]
rcvd [CHAP Success id=0x1 "S=FD1AC3533A35D7668FB5D24910D711DBFFF01C59"]
CHAP authentication succeeded
Regards,
Sebastiaan
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