* lib/shadow.c: Replace strtol() by getlong(). Also detect more

issues in a numerical shadow entry field.
This commit is contained in:
nekral-guest 2009-04-10 22:35:14 +00:00
parent b5200cf753
commit 9a7f5c6b16
2 changed files with 105 additions and 84 deletions

View File

@ -1,3 +1,8 @@
2009-04-06 Nicolas François <nicolas.francois@centraliens.net>
* lib/shadow.c: Replace strtol() by getlong(). Also detect more
issues in a numerical shadow entry field.
2009-04-06 Nicolas François <nicolas.francois@centraliens.net>
* lib/sgetspent.c: Only compile ifndef HAVE_SGETSPENT

View File

@ -2,7 +2,7 @@
* Copyright (c) 1989 - 1994, Julianne Frances Haugh
* Copyright (c) 1996 - 1998, Marek Michałkiewicz
* Copyright (c) 2003 - 2005, Tomasz Kłoczko
* Copyright (c) 2008 , Nicolas François
* Copyright (c) 2009 , Nicolas François
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -56,8 +56,6 @@ static int nis_vallen;
#endif
static FILE *shadow;
static char spwbuf[BUFSIZ];
static struct spwd spwd;
#define FIELDS 9
#define OFIELDS 5
@ -72,8 +70,9 @@ void __setspNIS (int flag)
{
nis_ignore = !flag;
if (nis_ignore)
if (nis_ignore) {
nis_used = 0;
}
}
/*
@ -124,6 +123,8 @@ void endspent (void)
static struct spwd *my_sgetspent (const char *string)
{
static char spwbuf[BUFSIZ];
static struct spwd spwd;
char *fields[FIELDS];
char *cp;
char *cpp;
@ -182,52 +183,58 @@ static struct spwd *my_sgetspent (const char *string)
* incorrectly formatted number, unless we are using NIS.
*/
spwd.sp_lstchg = strtol (fields[2], &cpp, 10);
if ((spwd.sp_lstchg == 0) && *cpp) {
#ifdef USE_NIS
if (!nis_used)
return 0;
else
spwd.sp_lstchg = -1;
#else
return 0;
#endif
} else if (fields[2][0] == '\0')
if (fields[2][0] == '\0') {
spwd.sp_lstchg = -1;
} else {
if (getlong (fields[2], &spwd.sp_lstchg) == 0) {
#ifdef USE_NIS
if (nis_used) {
spwd.sp_lstchg = -1;
} else
#endif
return 0;
} else if (spwd.sp_lstchg < 0) {
return 0;
}
}
/*
* Get the minimum period between password changes.
*/
spwd.sp_min = strtol (fields[3], &cpp, 10);
if ((spwd.sp_min == 0) && *cpp) {
#ifdef USE_NIS
if (!nis_used)
return 0;
else
spwd.sp_min = -1;
#else
return 0;
#endif
} else if (fields[3][0] == '\0')
if (fields[3][0] == '\0') {
spwd.sp_min = -1;
} else {
if (getlong (fields[3], &spwd.sp_min) == 0) {
#ifdef USE_NIS
if (nis_used) {
spwd.sp_min = -1;
} else
#endif
return 0;
} else if (spwd.sp_min < 0) {
return 0;
}
}
/*
* Get the maximum number of days a password is valid.
*/
spwd.sp_max = strtol (fields[4], &cpp, 10);
if ((spwd.sp_max == 0) && *cpp) {
#ifdef USE_NIS
if (!nis_used)
return 0;
else
spwd.sp_max = -1;
#else
return 0;
#endif
} else if (fields[4][0] == '\0')
if (fields[4][0] == '\0') {
spwd.sp_max = -1;
} else {
if (getlong (fields[4], &spwd.sp_max) == 0) {
#ifdef USE_NIS
if (nis_used) {
spwd.sp_max = -1;
} else
#endif
return 0;
} else if (spwd.sp_max < 0) {
return 0;
}
}
/*
* If there are only OFIELDS fields (this is a SVR3.2 /etc/shadow
@ -235,8 +242,10 @@ static struct spwd *my_sgetspent (const char *string)
*/
if (i == OFIELDS) {
spwd.sp_warn = spwd.sp_inact = spwd.sp_expire =
spwd.sp_flag = SHADOW_SP_FLAG_UNSET;
spwd.sp_warn = -1;
spwd.sp_inact = -1;
spwd.sp_expire = -1;
spwd.sp_flag = SHADOW_SP_FLAG_UNSET;
return &spwd;
}
@ -245,54 +254,59 @@ static struct spwd *my_sgetspent (const char *string)
* Get the number of days of password expiry warning.
*/
spwd.sp_warn = strtol (fields[5], &cpp, 10);
if ((spwd.sp_warn == 0) && *cpp) {
#ifdef USE_NIS
if (!nis_used)
return 0;
else
spwd.sp_warn = -1;
#else
return 0;
#endif
} else if (fields[5][0] == '\0')
if (fields[5][0] == '\0') {
spwd.sp_warn = -1;
} else {
if (getlong (fields[5], &spwd.sp_warn) == 0) {
#ifdef USE_NIS
if (nis_used) {
spwd.sp_warn = -1;
} else
#endif
return 0;
} else if (spwd.sp_warn < 0) {
return 0;
}
}
/*
* Get the number of days of inactivity before an account is
* disabled.
*/
spwd.sp_inact = strtol (fields[6], &cpp, 10);
if ((spwd.sp_inact == 0) && *cpp) {
#ifdef USE_NIS
if (!nis_used)
return 0;
else
spwd.sp_inact = -1;
#else
return 0;
#endif
} else if (fields[6][0] == '\0')
if (fields[6][0] == '\0') {
spwd.sp_inact = -1;
} else {
if (getlong (fields[6], &spwd.sp_inact) == 0) {
#ifdef USE_NIS
if (nis_used) {
spwd.sp_inact = -1;
} else
#endif
return 0;
} else if (spwd.sp_inact < 0) {
return 0;
}
}
/*
* Get the number of days after the epoch before the account is
* set to expire.
*/
spwd.sp_expire = strtol (fields[7], &cpp, 10);
if ((spwd.sp_expire == 0) && *cpp) {
#ifdef USE_NIS
if (!nis_used)
return 0;
else
spwd.sp_expire = -1;
#else
return 0;
#endif
} else if (fields[7][0] == '\0') {
if (fields[7][0] == '\0') {
spwd.sp_expire = -1;
} else {
if (getlong (fields[7], &spwd.sp_expire) == 0) {
#ifdef USE_NIS
if (nis_used) {
spwd.sp_expire = -1;
} else
#endif
return 0;
} else if (spwd.sp_expire < 0) {
return 0;
}
}
/*
@ -300,19 +314,20 @@ static struct spwd *my_sgetspent (const char *string)
* to have anything other than a valid integer in it.
*/
spwd.sp_flag = strtol (fields[8], &cpp, 10);
if ((spwd.sp_flag == 0) && *cpp) {
#ifdef USE_NIS
if (!nis_used) {
return 0;
} else {
spwd.sp_flag = SHADOW_SP_FLAG_UNSET;
}
#else
return 0;
#endif
} else if (fields[8][0] == '\0') {
if (fields[8][0] == '\0') {
spwd.sp_flag = SHADOW_SP_FLAG_UNSET;
} else {
if (getlong (fields[8], &spwd.sp_flag) == 0) {
/* FIXME: add a getulong function */
#ifdef USE_NIS
if (nis_used) {
spwd.sp_flag = SHADOW_SP_FLAG_UNSET;
} else
#endif
return 0;
} else if (spwd.sp_flag < 0) {
return 0;
}
}
return (&spwd);
@ -519,3 +534,4 @@ struct spwd *getspnam (const char *name)
#else
extern int errno; /* warning: ANSI C forbids an empty source file */
#endif