ref: 45ce4de65064ffb0e8b1904118cea7e16528cffa
dir: /sys/src/libauth/auth_challenge.c/
#include <u.h> #include <libc.h> #include <auth.h> #include "authlocal.h" Chalstate* auth_challenge(char *fmt, ...) { char *p; va_list arg; Chalstate *c; quotefmtinstall(); /* just in case */ va_start(arg, fmt); p = vsmprint(fmt, arg); va_end(arg); if(p == nil) return nil; c = mallocz(sizeof(*c), 1); if(c == nil){ free(p); return nil; } if((c->afd = open("/mnt/factotum/rpc", ORDWR)) < 0){ Error: auth_freechal(c); free(p); return nil; } if((c->rpc=auth_allocrpc(c->afd)) == nil || auth_rpc(c->rpc, "start", p, strlen(p)) != ARok || auth_rpc(c->rpc, "read", nil, 0) != ARok) goto Error; if(c->rpc->narg > sizeof(c->chal)-1){ werrstr("buffer too small for challenge"); goto Error; } memmove(c->chal, c->rpc->arg, c->rpc->narg); c->nchal = c->rpc->narg; free(p); return c; } AuthInfo* auth_response(Chalstate *c) { int ret; AuthInfo *ai; ai = nil; if(c->afd < 0){ werrstr("auth_response: connection not open"); return nil; } if(c->resp == nil){ werrstr("auth_response: nil response"); return nil; } if(c->nresp == 0){ werrstr("auth_response: unspecified response length"); return nil; } if(c->user){ if(auth_rpc(c->rpc, "write", c->user, strlen(c->user)) != ARok){ /* * if this fails we're out of phase with factotum. * give up. */ goto Out; } } if(c->dom){ if(auth_rpc(c->rpc, "write", c->dom, strlen(c->dom)) != ARok){ /* * if this fails we're out of phase with factotum. * give up. */ goto Out; } } if(auth_rpc(c->rpc, "write", c->resp, c->nresp) != ARok){ /* * don't close the connection -- maybe we'll try again. */ return nil; } switch(ret = auth_rpc(c->rpc, "read", nil, 0)){ case ARok: default: werrstr("factotum protocol botch %d %s", ret, c->rpc->ibuf); break; case ARdone: ai = auth_getinfo(c->rpc); break; } Out: close(c->afd); auth_freerpc(c->rpc); c->afd = -1; c->rpc = nil; return ai; } void auth_freechal(Chalstate *c) { if(c == nil) return; if(c->afd >= 0) close(c->afd); if(c->rpc != nil) auth_freerpc(c->rpc); memset(c, 0xBB, sizeof(*c)); free(c); }