118 lines
1.9 KiB
C
118 lines
1.9 KiB
C
#include <u.h>
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#include <libc.h>
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#include <auth.h>
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#include <authsrv.h>
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#include "authlocal.h"
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Chalstate*
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auth_challenge(char *fmt, ...)
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{
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char *p;
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va_list arg;
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Chalstate *c;
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quotefmtinstall(); /* just in case */
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va_start(arg, fmt);
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p = vsmprint(fmt, arg);
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va_end(arg);
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if(p == nil)
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return nil;
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c = mallocz(sizeof(*c), 1);
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if(c == nil){
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free(p);
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return nil;
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}
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if((c->afd = open("/mnt/factotum/rpc", ORDWR)) < 0){
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Error:
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auth_freechal(c);
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free(p);
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return nil;
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}
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if((c->rpc=auth_allocrpc(c->afd)) == nil
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|| auth_rpc(c->rpc, "start", p, strlen(p)) != ARok
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|| auth_rpc(c->rpc, "read", nil, 0) != ARok)
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goto Error;
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if(c->rpc->narg > sizeof(c->chal)-1){
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werrstr("buffer too small for challenge");
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goto Error;
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}
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memmove(c->chal, c->rpc->arg, c->rpc->narg);
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c->nchal = c->rpc->narg;
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free(p);
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return c;
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}
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AuthInfo*
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auth_response(Chalstate *c)
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{
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int ret;
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AuthInfo *ai;
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ai = nil;
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if(c->afd < 0){
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werrstr("auth_response: connection not open");
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return nil;
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}
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if(c->resp == nil){
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werrstr("auth_response: nil response");
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return nil;
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}
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if(c->nresp == 0){
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werrstr("auth_response: unspecified response length");
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return nil;
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}
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if(c->user){
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if(auth_rpc(c->rpc, "write", c->user, strlen(c->user)) != ARok){
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/*
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* if this fails we're out of phase with factotum.
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* give up.
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*/
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goto Out;
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}
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}
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if(auth_rpc(c->rpc, "write", c->resp, c->nresp) != ARok){
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/*
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* don't close the connection -- maybe we'll try again.
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*/
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return nil;
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}
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switch(ret = auth_rpc(c->rpc, "read", nil, 0)){
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case ARok:
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default:
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werrstr("factotum protocol botch %d %s", ret, c->rpc->ibuf);
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break;
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case ARdone:
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ai = auth_getinfo(c->rpc);
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break;
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}
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Out:
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close(c->afd);
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auth_freerpc(c->rpc);
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c->afd = -1;
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c->rpc = nil;
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return ai;
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}
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void
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auth_freechal(Chalstate *c)
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{
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if(c == nil)
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return;
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if(c->afd >= 0)
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close(c->afd);
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if(c->rpc != nil)
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auth_freerpc(c->rpc);
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memset(c, 0xBB, sizeof(*c));
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free(c);
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}
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