minix/commands/pwdauth/pwdauth.c

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2005-04-21 16:53:53 +02:00
/* pwdauth 2.0 - check a shadow password Author: Kees J. Bot
* 7 Feb 1994
*
* This program gets as input the key and salt arguments of the crypt(3)
* function as two null terminated strings. The crypt result is output as
* one null terminated string. Input and output must be <= 1024 characters.
* The exit code will be 1 on any error.
*
* If the key has the form '##name' then the key will be encrypted and the
* result checked to be equal to the encrypted password in the shadow password
* file. If equal than '##name' will be returned, otherwise exit code 2.
*
* Otherwise the key will be encrypted normally and the result returned.
*
* As a special case, anything matches a null encrypted password to allow
* a no-password login.
*/
#define nil 0
#include <sys/types.h>
#include <pwd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
Build NetBSD libc library in world in ELF mode. 3 sets of libraries are built now: . ack: all libraries that ack can compile (/usr/lib/i386/) . clang+elf: all libraries with minix headers (/usr/lib/) . clang+elf: all libraries with netbsd headers (/usr/netbsd/) Once everything can be compiled with netbsd libraries and headers, the /usr/netbsd hierarchy will be obsolete and its libraries compiled with netbsd headers will be installed in /usr/lib, and its headers in /usr/include. (i.e. minix libc and current minix headers set will be gone.) To use the NetBSD libc system (libraries + headers) before it is the default libc, see: http://wiki.minix3.org/en/DevelopersGuide/UsingNetBSDCode This wiki page also documents the maintenance of the patch files of minix-specific changes to imported NetBSD code. Changes in this commit: . libsys: Add NBSD compilation and create a safe NBSD-based libc. . Port rest of libraries (except libddekit) to new header system. . Enable compilation of libddekit with new headers. . Enable kernel compilation with new headers. . Enable drivers compilation with new headers. . Port legacy commands to new headers and libc. . Port servers to new headers. . Add <sys/sigcontext.h> in compat library. . Remove dependency file in tree. . Enable compilation of common/lib/libc/atomic in libsys . Do not generate RCSID strings in libc. . Temporarily disable zoneinfo as they are incompatible with NetBSD format . obj-nbsd for .gitignore . Procfs: use only integer arithmetic. (Antoine Leca) . Increase ramdisk size to create NBSD-based images. . Remove INCSYMLINKS handling hack. . Add nbsd_include/sys/exec_elf.h . Enable ELF compilation with NBSD libc. . Add 'make nbsdsrc' in tools to download reference NetBSD sources. . Automate minix-port.patch creation. . Avoid using fstavfs() as it is *extremely* slow and unneeded. . Set err() as PRIVATE to avoid name clash with libc. . [NBSD] servers/vm: remove compilation warnings. . u32 is not a long in NBSD headers. . UPDATING info on netbsd hierarchy . commands fixes for netbsd libc
2011-04-27 15:00:52 +02:00
#define setkey pwdauth_setkey
#define encrypt pwdauth_encrypt
2005-04-21 16:53:53 +02:00
#define LEN 1024
int main(int argc, char **argv)
{
char key[LEN];
char *salt;
struct passwd *pw;
int n;
/* Read input data. Check if there are exactly two null terminated
* strings.
*/
n= read(0, key, LEN);
if (n < 0) return 1;
salt = key + n;
n = 0;
while (salt > key) if (*--salt == 0) n++;
if (n != 2) return 1;
salt = key + strlen(key) + 1;
if (salt[0] == '#' && salt[1] == '#') {
if ((pw= getpwnam(salt + 2)) == nil) return 2;
/* A null encrypted password matches a null key, otherwise
* do the normal crypt(3) authentication check.
*/
if (*pw->pw_passwd == 0 && *key == 0) {
/* fine */
} else
if (strcmp(crypt(key, pw->pw_passwd), pw->pw_passwd) != 0) {
return 2;
}
} else {
/* Normal encryption. */
if (*salt == 0 && *key == 0) {
/* fine */
} else {
salt= crypt(key, salt);
}
}
/* Return the (possibly new) salt to the caller. */
if (write(1, salt, strlen(salt) + 1) < 0) return 1;
return 0;
}