/* * $Source: /usr/src/kerberosIV/des/RCS/read_password.c,v $ * $Author: kfall $ * * Copyright 1985, 1986, 1987, 1988 by the Massachusetts Institute * of Technology. * * For copying and distribution information, please see the file * <mit-copyright.h>. * * This routine prints the supplied string to standard * output as a prompt, and reads a password string without * echoing. */ #ifndef lint static char rcsid_read_password_c[] = "$Header: /usr/src/kerberosIV/des/RCS/read_password.c,v 4.13 90/06/23 03:09:35 kfall Exp $"; #endif lint #include <sys/param.h> #include <stdio.h> #include <string.h> #include <setjmp.h> #include <pwd.h> #include <mit-copyright.h> #include <des.h> #include "conf.h" extern char *getpass(); #ifdef BSDUNIX static jmp_buf env; #endif int des_read_password(k, prompt, verify) des_cblock *k; char *prompt; int verify; { int ok; char key_string[_PASSWORD_LEN]; #ifdef BSDUNIX if (setjmp(env)) { ok = -1; goto lose; } #endif ok = des_read_pw_string(key_string, _PASSWORD_LEN, prompt, verify); if (ok == 0) des_string_to_key(key_string, k); lose: bzero(key_string, sizeof (key_string)); return ok; } /* * This version just returns the string, doesn't map to key. * * Returns 0 on success, non-zero on failure. */ int des_read_pw_string(s, max, prompt, verify) char *s; int max; char *prompt; int verify; { register int len = MIN(_PASSWORD_LEN, max); char *ptr = getpass(prompt); (void)strncpy(s, ptr, len); if (verify) { while (strncmp(getpass(prompt), s, len) != 0) { printf("\n\07\07Mismatch - try again\n"); (void)fflush(stdout); continue; } } s[len-1] = '\0'; /* just in case */ return 0; }