Changin Sun EEPROM Passowrd via program
2007-12-25 8:10:00
A couple of days ago I posted a request for information/assistance
regarding a program using ioctl's to change the eeprom password
on a Sun workstation. I got a couple of responses right off the
bat indicating that those persons would also like to see such a program.
After some creative thinking, and alot of help from one of my
colleagues, we arrived at the following program, epset.c. This program
will set the Sun EEPROM security-mode parameter to "command" and it
will set the EEPROM password to a parameter given on the command line.
Note that the program overwrites argv[1] so that the PROM password
is not seen in 'ps'.
I hope this is useful. If anyone has any suggestions or questions, please
post or send e-mail.
(Special thanks to Karl Morgan for original ideas and very helpful
guidance in this endeavor)
-------------------------epset.c------------------------------------------
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sundev/openpromio.h>
#include <fcntl.h>
#include <errno.h>
#define OPENPROM "/dev/openprom"
#define SECPASS "security-password"
#define SECMODE "security-mode"
#define SECMODEVAL "command"
main(argc,argv)
int argc;
char *argv[];
{
int fd, prom_size,j;
struct openpromio *secmode,*secpass;
char passwd[10];
/* Copy Password from command line arguments */
strcpy(passwd,argv[1]);
/* Zero out the contents of argv so password does not show
in a 'ps' */
*argv[1] = 0;
for (j=1;j < strlen(passwd); j = j + 1) {
*(argv[1] + j) = 0;
}
/* Open the PROM Monitor device so we can write to it */
if ((fd = open(OPENPROM, O_RDWR)) < 0) {
(void) fprintf(stderr, "Can't open %s\n", OPENPROM);
exit (1);
}
/* Allocate space for the prom data structure */
secmode = (struct openpromio *)malloc(sizeof(struct openpromio));
/* Set PROM security-mode=command */
secmode->oprom_size = strlen(SECMODE) + strlen(SECMODEVAL) + 2;
secmode->oprom_array[0] = malloc(1023);
strcpy(secmode->oprom_array, SECMODE);
strcat(secmode->oprom_array + strlen(SECMODE) + 1, SECMODEVAL);
if (ioctl(fd, OPROMSETOPT2, secmode) == -1) {
perror("Error in ioctl");
exit (1);
}
/* Allocate space for the prom data structure */
secpass = (struct openpromio *)malloc(sizeof(struct openpromio));
/* Set PROM security-password= out password */
secpass->oprom_size = strlen(SECPASS) + strlen(passwd) + 2;
secpass->oprom_array[0] = malloc(1023);
strcpy(secpass->oprom_array, SECPASS);
strcat(secpass->oprom_array + strlen(SECPASS) + 1, passwd);
if (ioctl(fd, OPROMSETOPT2, secpass) == -1) {
perror("Error in ioctl");
exit (1);
}
/* Free the used data structures */
free(secmode->oprom_array[0]);
free(secpass->oprom_array[0]);
free(secmode);
free(secpass);
/* Close the PROM Monitor */
close(fd);
/* Goodbye */
exit (0);
}
-----------------------epset.c---------------------------------------------
===============================================================================
Blake Holman | "The one good thing about repeating your
Ericsson Network Systems, Inc. | mistakes is that you know when to
730 International Parkway, MS B-07 | cringe."
Richardson, Texas 75081 |
(214) 997-6784 | -- Author Unknown
e-mail: exubho@exu.ericsson.se |
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