ubase/libutil/passwd.c

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/* See LICENSE file for copyright and license details. */
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#include <sys/resource.h>
#include <sys/time.h>
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#include <errno.h>
#include <pwd.h>
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#include <shadow.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#include <unistd.h>
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#include "../passwd.h"
#include "../text.h"
#include "../util.h"
/* Returns -1 on error, 0 for incorrect password
* and 1 if all went OK */
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int
pw_check(const struct passwd *pw, const char *pass)
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{
char *cryptpass, *p;
struct spwd *spw;
p = pw->pw_passwd;
if (p[0] == '!' || p[0] == '*') {
weprintf("denied\n");
return -1;
}
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if (pw->pw_passwd[0] == '\0') {
if (pass[0] == '\0')
return 1;
weprintf("incorrect password\n");
return 0;
}
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if (pw->pw_passwd[0] == 'x' && pw->pw_passwd[1] == '\0') {
errno = 0;
spw = getspnam(pw->pw_name);
if (!spw) {
if (errno)
weprintf("getspnam: %s:", pw->pw_name);
else
weprintf("who are you?\n");
return -1;
}
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p = spw->sp_pwdp;
if (p[0] == '!' || p[0] == '*') {
weprintf("denied\n");
return -1;
}
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}
cryptpass = crypt(pass, p);
if (!cryptpass) {
weprintf("crypt:");
return -1;
}
if (strcmp(cryptpass, p) != 0) {
weprintf("incorrect password\n");
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return 0;
}
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return 1;
}
int
pw_init(void)
{
struct rlimit rlim;
rlim.rlim_cur = 0;
rlim.rlim_max = 0;
if (setrlimit(RLIMIT_CORE, &rlim) < 0)
eprintf("setrlimit:");
return 0;
}