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/* password.c */
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <mp.h>
#include <libsec.h>
#include "SConn.h"
#include "secstore.h"
static Biobuf*
openPW(char *id, int mode)
{
Biobuf *b;
int nfn = strlen(SECSTORE_DIR)+strlen(id)+20;
char *fn = emalloc(nfn);
snprint(fn, nfn, "%s/who/%s", SECSTORE_DIR, id);
b = Bopen(fn, mode);
free(fn);
return b;
}
static ulong
mtimePW(char *id)
{
Dir *d;
int nfn = strlen(SECSTORE_DIR)+strlen(id)+20;
char *fn = emalloc(nfn);
ulong mt;
snprint(fn, nfn, "%s/who/%s", SECSTORE_DIR, id);
d = dirstat(fn);
free(fn);
mt = d->mtime;
free(d);
return mt;
}
PW *
getPW(char *id, int dead_or_alive)
{
uint now = time(0);
Biobuf *bin;
PW *pw;
char *f1, *f2; // fields 1, 2 = attribute, value
if((bin = openPW(id, OREAD)) == 0){
id = "FICTITIOUS";
if((bin = openPW(id, OREAD)) == 0){
werrstr("account does not exist");
return nil;
}
}
pw = emalloc(sizeof(*pw));
pw->id = estrdup(id);
pw->status |= Enabled;
while( (f1 = Brdline(bin, '\n')) != 0){
f1[Blinelen(bin)-1] = 0;
for(f2 = f1; *f2 && (*f2!=' ') && (*f2!='\t'); f2++){}
if(*f2)
for(*f2++ = 0; *f2 && (*f2==' ' || *f2=='\t'); f2++){}
if(strcmp(f1, "exp") == 0){
pw->expire = strtoul(f2, 0, 10);
}else if(strcmp(f1, "DISABLED") == 0){
pw->status &= ~Enabled;
}else if(strcmp(f1, "STA") == 0){
pw->status |= STA;
}else if(strcmp(f1, "failed") == 0){
pw->failed = strtoul(f2, 0, 10);
}else if(strcmp(f1, "other") == 0){
pw->other = estrdup(f2);
}else if(strcmp(f1, "PAK-Hi") == 0){
pw->Hi = strtomp(f2, nil, 64, nil);
}
}
Bterm(bin);
if(dead_or_alive)
return pw; // return PW entry for editing, whether currently valid or not
if(pw->expire <= now){
werrstr("account expired");
freePW(pw);
return nil;
}
if((pw->status & Enabled) == 0){
werrstr("account disabled");
freePW(pw);
return nil;
}
if(pw->failed < 10)
return pw; // success
if(now < mtimePW(id)+300){
werrstr("too many failures; try again in five minutes");
freePW(pw);
return nil;
}
pw->failed = 0;
putPW(pw); // reset failed-login-counter after five minutes
return pw;
}
int
putPW(PW *pw)
{
Biobuf *bout;
char *hexHi;
if((bout = openPW(pw->id, OWRITE|OTRUNC)) ==0){
werrstr("can't open PW file");
return -1;
}
Bprint(bout, "exp %lud\n", pw->expire);
if(!(pw->status & Enabled))
Bprint(bout, "DISABLED\n");
if(pw->status & STA)
Bprint(bout, "STA\n");
if(pw->failed)
Bprint(bout, "failed\t%d\n", pw->failed);
if(pw->other)
Bprint(bout,"other\t%s\n", pw->other);
hexHi = mptoa(pw->Hi, 64, nil, 0);
Bprint(bout, "PAK-Hi\t%s\n", hexHi);
free(hexHi);
return 0;
}
void
freePW(PW *pw)
{
if(pw == nil)
return;
free(pw->id);
free(pw->other);
mpfree(pw->Hi);
free(pw);
}
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