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-rw-r--r--src/passwd/getspnam_r.c20
1 files changed, 13 insertions, 7 deletions
diff --git a/src/passwd/getspnam_r.c b/src/passwd/getspnam_r.c
index d21ca810..9e29aa9c 100644
--- a/src/passwd/getspnam_r.c
+++ b/src/passwd/getspnam_r.c
@@ -1,6 +1,7 @@
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
+#include <ctype.h>
#include "pwf.h"
/* This implementation support Openwall-style TCB passwords in place of
@@ -10,6 +11,11 @@
* file. It also avoids any allocation to prevent memory-exhaustion
* attacks via huge TCB shadow files. */
+static long xatol(const char *s)
+{
+ return isdigit(*s) ? atol(s) : -1;
+}
+
int getspnam_r(const char *name, struct spwd *sp, char *buf, size_t size, struct spwd **res)
{
char path[20+NAME_MAX];
@@ -64,25 +70,25 @@ int getspnam_r(const char *name, struct spwd *sp, char *buf, size_t size, struct
*s++ = 0; sp->sp_pwdp = s;
if (!(s = strchr(s, ':'))) continue;
- *s++ = 0; sp->sp_lstchg = atol(s);
+ *s++ = 0; sp->sp_lstchg = xatol(s);
if (!(s = strchr(s, ':'))) continue;
- *s++ = 0; sp->sp_min = atol(s);
+ *s++ = 0; sp->sp_min = xatol(s);
if (!(s = strchr(s, ':'))) continue;
- *s++ = 0; sp->sp_max = atol(s);
+ *s++ = 0; sp->sp_max = xatol(s);
if (!(s = strchr(s, ':'))) continue;
- *s++ = 0; sp->sp_warn = atol(s);
+ *s++ = 0; sp->sp_warn = xatol(s);
if (!(s = strchr(s, ':'))) continue;
- *s++ = 0; sp->sp_inact = atol(s);
+ *s++ = 0; sp->sp_inact = xatol(s);
if (!(s = strchr(s, ':'))) continue;
- *s++ = 0; sp->sp_expire = atol(s);
+ *s++ = 0; sp->sp_expire = xatol(s);
if (!(s = strchr(s, ':'))) continue;
- *s++ = 0; sp->sp_flag = atol(s);
+ *s++ = 0; sp->sp_flag = xatol(s);
*res = sp;
break;
}