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Add initial pw_check()

This commit is contained in:
sin 2014-06-09 10:51:02 +01:00
parent 1abf7518ad
commit 77a2f9f92c
2 changed files with 92 additions and 48 deletions
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3
passwd.h
View File

@ -1,4 +1,5 @@
/* See LICENSE file for copyright and license details. */
/* passwd.c */
int pw_scan(char *, struct passwd *);
int pw_check(struct passwd *, const char *);
int pw_copy(int, int, const struct passwd *);
int pw_scan(char *, struct passwd *);

137
util/passwd.c
View File

@ -1,11 +1,101 @@
/* See LICENSE file for copyright and license details. */
#include <errno.h>
#include <pwd.h>
#include <shadow.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "../passwd.h"
#include "../text.h"
#include "../util.h"
int
pw_check(struct passwd *pw, const char *pass)
{
char *cryptpass, *p;
struct spwd *spw;
p = pw->pw_passwd;
switch (pw->pw_passwd[0]) {
case '!':
case '*':
eprintf("denied\n");
}
if (pw->pw_passwd[0] == '\0')
return 1;
if (pw->pw_passwd[0] == 'x' && pw->pw_passwd[1] == '\0') {
errno = 0;
spw = getspnam(pw->pw_name);
if (errno)
eprintf("getspnam: %:", pw->pw_name);
else if (!spw)
eprintf("who are you?\n");
switch (spw->sp_pwdp[0]) {
case '!':
case '*':
eprintf("denied\n");
}
p = spw->sp_pwdp;
}
cryptpass = crypt(pass, p);
if (!cryptpass)
eprintf("crypt:");
if (strcmp(cryptpass, p) != 0)
return 0;
return 1;
}
int
pw_copy(int ffd, int tfd, const struct passwd *newpw)
{
struct passwd pw;
char *buf = NULL, *p;
size_t size = 0;
FILE *from, *to;
from = fdopen(ffd, "r");
if (!from) {
weprintf("fdopen:");
return -1;
}
to = fdopen(tfd, "w");
if (!to) {
weprintf("fdopen:");
return -1;
}
while (agetline(&buf, &size, from) != -1) {
p = strdup(buf);
if (!p) {
weprintf("strdup:");
return -1;
}
if (newpw) {
if (pw_scan(p, &pw) < 0)
return -1;
if (strcmp(pw.pw_name, newpw->pw_name) == 0) {
fprintf(to, "%s:%s:%u:%u:%s:%s:%s\n",
newpw->pw_name,
newpw->pw_passwd,
newpw->pw_uid,
newpw->pw_gid,
newpw->pw_gecos,
newpw->pw_dir,
newpw->pw_shell);
continue;
}
}
fprintf(to, "%s", buf);
free(p);
}
fflush(to);
free(buf);
return 0;
}
int
pw_scan(char *bp, struct passwd *pw)
{
@ -65,50 +155,3 @@ corrupt:
weprintf("corrupted passwd entry\n");
return -1;
}
int
pw_copy(int ffd, int tfd, const struct passwd *newpw)
{
struct passwd pw;
char *buf = NULL, *p;
size_t size = 0;
FILE *from, *to;
from = fdopen(ffd, "r");
if (!from) {
weprintf("fdopen:");
return -1;
}
to = fdopen(tfd, "w");
if (!to) {
weprintf("fdopen:");
return -1;
}
while (agetline(&buf, &size, from) != -1) {
p = strdup(buf);
if (!p) {
weprintf("strdup:");
return -1;
}
if (newpw) {
if (pw_scan(p, &pw) < 0)
return -1;
if (strcmp(pw.pw_name, newpw->pw_name) == 0) {
fprintf(to, "%s:%s:%u:%u:%s:%s:%s\n",
newpw->pw_name,
newpw->pw_passwd,
newpw->pw_uid,
newpw->pw_gid,
newpw->pw_gecos,
newpw->pw_dir,
newpw->pw_shell);
continue;
}
}
fprintf(to, "%s", buf);
free(p);
}
fflush(to);
free(buf);
return 0;
}