Does anyone know how to remove a stanza in the shadow password file if the user account has already been removed on an AIX box? I know it can be done by editing the file itself but I would prefer not to do it that way.
cheers
gizaa (2 Replies)
Hi,
I want to append password into /etc/shadow file using a shell script.
My below script does add the users to both /etc/passwd and /etc/shadow but how can I add the hordcoded passwords to /etc/shadow file can some one help me ?
# To add the groups into /etc/group file
for a_user... (5 Replies)
hi,
I had to reset a lost root password by editing the /etc/passwd and /etc/shadow files ( this is a xen vm file, so i mounted and chrooted the file )
after the reboot with an empty password on root , i have set a new password with passwd but
it only changed the /etc/passwd file.... (0 Replies)
We are currently using a script to copy the same encrypted password between our HP-UX and Solaris servers editing the trusted and shadow files directly. The encrypted password is only 13 characters long on both servers and decrypts the same way. Is there a way to copy this same string to Linux... (5 Replies)
Hello,
I want to know the reason behing the scene why some systems have hashed password in /etc/shadow file as "x" not the alienoid language like A1Dksxi3kaA.. (13 characters)
As far as I understand, etc/password will show password as "x" and move all hashed password to etc/shadow.... (8 Replies)
Hi
I wonder whether is possible to generate enrypted passwd for some user and paste it into /etc/shadow file ?
What kind of encryption is used in /etc/shadow file ?
ths for help. (1 Reply)
Today i was going through some of security guides written on linux .
Under shadow file security following points were mentioned.
1)The encrypted password stored under /etc/shadow file should have more than 14-25 characters.
2)Usernames in shadow file must satisfy to all the same rules as... (14 Replies)
Hello,
I have to do a script which returns users who have never changed their password from /etc/shadow.
Here is what have I done and I'm not sure if it's ok.
I tried to return just users who doesn;t have password set or are locked.
Can be there other kind of user who never changed the... (3 Replies)
i have an application that uses the encrypted password that's in the /etc/shadow file.
i copied the line for the particular username i was interested it in from shadow file and i pasted it into the password file of the application. the application is nagios.
this application allowed that... (5 Replies)
Discussion started by: SkySmart
5 Replies
LEARN ABOUT LINUX
setkey
ENCRYPT(3) Linux Programmer's Manual ENCRYPT(3)NAME
encrypt, setkey, encrypt_r, setkey_r - encrypt 64-bit messages
SYNOPSIS
#define _XOPEN_SOURCE
#include <unistd.h>
void encrypt(char block[64], int edflag);
#define _XOPEN_SOURCE
#include <stdlib.h>
void setkey(const char *key);
#define _GNU_SOURCE
#include <crypt.h>
void setkey_r(const char *key, struct crypt_data *data);
void encrypt_r(char *block, int edflag, struct crypt_data *data);
Each of these requires linking with -lcrypt.
DESCRIPTION
These functions encrypt and decrypt 64-bit messages. The setkey() function sets the key used by encrypt(). The key argument used here is
an array of 64 bytes, each of which has numerical value 1 or 0. The bytes key[n] where n=8*i-1 are ignored, so that the effective key
length is 56 bits.
The encrypt() function modifies the passed buffer, encoding if edflag is 0, and decoding if 1 is being passed. Like the key argument, also
block is a bit vector representation of the actual value that is encoded. The result is returned in that same vector.
These two functions are not reentrant, that is, the key data is kept in static storage. The functions setkey_r() and encrypt_r() are the
reentrant versions. They use the following structure to hold the key data:
struct crypt_data {
char keysched[16 * 8];
char sb0[32768];
char sb1[32768];
char sb2[32768];
char sb3[32768];
char crypt_3_buf[14];
char current_salt[2];
long int current_saltbits;
int direction;
int initialized;
};
Before calling setkey_r() set data->initialized to zero.
RETURN VALUE
These functions do not return any value.
ERRORS
Set errno to zero before calling the above functions. On success, it is unchanged.
ENOSYS The function is not provided. (For example because of former USA export restrictions.)
CONFORMING TO
The functions encrypt() and setkey() conform to SVr4, SUSv2, and POSIX.1-2001. The functions encrypt_r() and setkey_r() are GNU exten-
sions.
NOTES
In glibc 2.2 these functions use the DES algorithm.
EXAMPLE
You need to link with libcrypt to compile this example with glibc. To do useful work the key[] and txt[] arrays must be filled with a use-
ful bit pattern.
#define _XOPEN_SOURCE
#include <unistd.h>
#include <stdlib.h>
int
main(void)
{
char key[64]; /* bit pattern for key */
char txt[64]; /* bit pattern for messages */
setkey(key);
encrypt(txt, 0); /* encode */
encrypt(txt, 1); /* decode */
}
SEE ALSO cbc_crypt(3), crypt(3), ecb_crypt(3), feature_test_macros(7)COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
2003-04-04 ENCRYPT(3)