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libauth: replace proto=p9cr with new proto=dp9ik/p9sk1 role=login for auth_userpasswd()

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This commit is contained in:
cinap_lenrek 2017-12-03 05:14:33 +01:00
parent 3ef51c16d4
commit 554fb43df5
1 changed files with 23 additions and 36 deletions
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59
sys/src/libauth/auth_userpasswd.c
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@ -1,49 +1,36 @@
#include <u.h>
#include <libc.h>
#include <auth.h>
#include <authsrv.h>
#include "authlocal.h"
/*
* compute the proper response. We encrypt the ascii of
* challenge number, with trailing binary zero fill.
* This process was derived empirically.
* this was copied from inet's guard.
*/
static void
netresp(char key[DESKEYLEN], long chal, char *answer)
{
uchar buf[8];
memset(buf, 0, sizeof buf);
snprint((char *)buf, sizeof buf, "%lud", chal);
if(encrypt(key, buf, 8) < 0)
abort();
sprint(answer, "%.8ux", buf[0]<<24 | buf[1]<<16 | buf[2]<<8 | buf[3]);
}
AuthInfo*
auth_userpasswd(char *user, char *passwd)
{
char resp[16], key[DESKEYLEN];
AuthRpc *rpc;
AuthInfo *ai;
Chalstate *ch;
char *s;
int afd;
/*
* Probably we should have a factotum protocol
* to check a raw password. For now, we use
* p9cr, which is simplest to speak.
*/
if((ch = auth_challenge("user=%q proto=p9cr role=server", user)) == nil)
afd = open("/mnt/factotum/rpc", ORDWR);
if(afd < 0)
return nil;
passtodeskey(key, passwd);
netresp(key, atol(ch->chal), resp);
memset(key, 0, sizeof(key));
ch->resp = resp;
ch->nresp = strlen(resp);
ai = auth_response(ch);
auth_freechal(ch);
ai = nil;
rpc = auth_allocrpc(afd);
if(rpc == nil)
goto Out;
s = "proto=dp9ik role=login";
if(auth_rpc(rpc, "start", s, strlen(s)) != ARok){
s = "proto=p9sk1 role=login";
if(auth_rpc(rpc, "start", s, strlen(s)) != ARok)
goto Out;
}
if(auth_rpc(rpc, "write", user, strlen(user)) != ARok
|| auth_rpc(rpc, "write", passwd, strlen(passwd)) != ARok)
goto Out;
ai = auth_getinfo(rpc);
Out:
if(rpc != nil)
auth_freerpc(rpc);
close(afd);
return ai;
}