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/*
* LDAP Utilities
* Copyright (C) 2012, 2019 David M. Syzdek <david@syzdek.net>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @file lib/libldaputils/lpasswd.c contains for password management functions and variables
*/
#define _LIB_LIBLDAPUTILS_LPASSWD_C 1
#include "lpasswd.h"
///////////////
// //
// Headers //
// //
///////////////
#ifdef __LDAPUTILS_PMARK
#pragma mark - Headers
#endif
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/stat.h>
#include <inttypes.h>
#include <stdlib.h>
#include <fcntl.h>
#include <assert.h>
#include <signal.h>
#ifdef HAVE_TERMIOS_H
#include <termios.h>
#endif
#ifdef HAVE_SGTTY_H
#include <sgtty.h>
#endif
/////////////////
// //
// Functions //
// //
/////////////////
#ifdef __LDAPUTILS_PMARK
#pragma mark - Functions
#endif
/// getpass() replacement -- SUSV 2 deprecated getpass()
/// @param[in] prompt prompt to display to end user
///
/// @return Returns string containing user entered password.
char * ldaputils_getpass(const char * prompt)
{
static char buff[512];
FILE * fs;
int c;
size_t pos;
#if defined(HAVE_TERMIOS_H) || defined(HAVE_SGTTY_H)
struct termios old;
struct termios new;
void (*sig)( int sig );
#endif
// prompts for password
prompt = ((prompt)) ? prompt : "Password: ";
if (prompt)
fprintf(stderr, "%s", prompt);
fflush(stdout);
// disables ECHO
#ifdef HAVE_TERMIOS_H
if ((fs = fopen("/dev/tty", "r")) == NULL)
fs = stdin;
if(tcgetattr(fileno(fs), &old) == -1)
return(NULL);
sig = signal(SIGINT, SIG_IGN);
new = old;
new.c_lflag &= ~((unsigned)ECHO);
if(tcsetattr(fileno(fs), TCSANOW, &new))
return(NULL);
#else
fs = stdin;
#endif
// reads buffer
pos = 0;
while ( ((c = getc(fs)) != EOF) && (c != '\n') && (c != '\r') )
if (pos < (sizeof(buff)-1))
buff[pos++] = (char)c;
buff[pos] = '\0';
// restores previous terminal
fprintf(stderr, "\n");
#ifdef HAVE_TERMIOS_H
fflush(stderr);
if(tcsetattr(fileno(fs), TCSANOW, &old))
return(NULL);
signal(SIGINT, sig);
#endif
return(buff);
}
/// retrieves password
/// @param[in] lud reference to LDAP utilities struct
///
/// @return Returns LDAP_SUCCESS on success or error code if fails
int ldaputils_pass(LDAPUtils * lud)
{
char * str;
assert(lud != NULL);
// exitting, already have password
if ((lud->passwd.bv_len))
return(LDAP_SUCCESS);
// prompt for password
if ((lud->want_pass))
{
if ((str = ldaputils_getpass("Enter LDAP Password: ")) == NULL)
{
fprintf(stderr, "%s: ldaputils_getpass(): unknown error\n", lud->prog_name);
return(1);
};
if ((lud->passwd.bv_val = strdup(str)) == NULL)
{
fprintf(stderr, "%s: out of virtual memory\n", lud->prog_name);
return(1);
};
lud->passwd.bv_len = strlen(str);
return(LDAP_SUCCESS);
};
if ((lud->passfile))
return(ldaputils_passfile(lud, lud->passfile, &lud->passwd.bv_val, &lud->passwd.bv_len));
// read password from file
return(LDAP_SUCCESS);
}
/// retrieves password from file
/// @param[in] lud reference to LDAP utilities struct
/// @param[in] file password file
/// @param[out] valp reference to pointer to store allocate memory
/// @param[out] lenp reference to pointer to store size of memory
///
/// @return Returns LDAP_SUCCESS on success or 1 on error
int ldaputils_passfile(LDAPUtils * lud, const char * file, char ** valp, size_t * lenp)
{
int fd;
ssize_t len;
char * buff;
struct stat sb;
assert(lud != NULL);
assert(file != NULL);
assert(valp != NULL);
// obtain file information
if ((stat(file, &sb)) == -1)
{
fprintf(stderr, "%s: %s: %s\n", lud->prog_name, file, strerror(errno));
return(1);
};
if (sb.st_mode & 0066)
fprintf(stderr, "%s: Password file %s is publicly readable/writeable\n", lud->prog_name, file);
// allocate buffer
if ((buff = malloc((size_t)sb.st_size+2)) == NULL)
{
fprintf(stderr, "%s: malloc(): %s\n", lud->prog_name, strerror(errno));
return(1);
};
// open and read file
if ((fd = open(file, O_RDONLY)) == -1)
{
fprintf(stderr, "%s: %s: %s\n", lud->prog_name, file, strerror(errno));
free(buff);
return(1);
};
if ((len = read(fd, buff, (size_t)sb.st_size)) == -1)
{
fprintf(stderr, "%s: read(): %s\n", lud->prog_name, strerror(errno));
free(buff);
return(1);
};
close(fd);
buff[sb.st_size] = '\0';
*valp = buff;
if ((lenp))
*lenp = (size_t)sb.st_size;
return(LDAP_SUCCESS);
}
/* end of source file */
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