/* $NetBSD: passfile.c,v 1.1.1.6.6.1 2019/08/10 06:17:16 martin Exp $ */ /* $OpenLDAP$ */ /* This work is part of OpenLDAP Software . * * Copyright 1998-2019 The OpenLDAP Foundation. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted only as authorized by the OpenLDAP * Public License. * * A copy of this license is available in the file LICENSE in the * top-level directory of the distribution or, alternatively, at * . */ #include __RCSID("$NetBSD: passfile.c,v 1.1.1.6.6.1 2019/08/10 06:17:16 martin Exp $"); #include "portable.h" #include #include #include #include #ifdef HAVE_FSTAT #include #include #endif /* HAVE_FSTAT */ #include #include /* Get a password from a file. */ int lutil_get_filed_password( const char *filename, struct berval *passwd ) { size_t nread, nleft, nr; FILE *f = fopen( filename, "r" ); if( f == NULL ) { perror( filename ); return -1; } passwd->bv_val = NULL; passwd->bv_len = 4096; #ifdef HAVE_FSTAT { struct stat sb; if ( fstat( fileno( f ), &sb ) == 0 ) { if( sb.st_mode & 006 ) { fprintf( stderr, _("Warning: Password file %s" " is publicly readable/writeable\n"), filename ); } if ( sb.st_size ) passwd->bv_len = sb.st_size; } } #endif /* HAVE_FSTAT */ passwd->bv_val = (char *) ber_memalloc( passwd->bv_len + 1 ); if( passwd->bv_val == NULL ) { perror( filename ); fclose( f ); return -1; } nread = 0; nleft = passwd->bv_len; do { if( nleft == 0 ) { /* double the buffer size */ char *p = (char *) ber_memrealloc( passwd->bv_val, 2 * passwd->bv_len + 1 ); if( p == NULL ) { ber_memfree( passwd->bv_val ); passwd->bv_val = NULL; passwd->bv_len = 0; fclose( f ); return -1; } nleft = passwd->bv_len; passwd->bv_len *= 2; passwd->bv_val = p; } nr = fread( &passwd->bv_val[nread], 1, nleft, f ); if( nr < nleft && ferror( f ) ) { ber_memfree( passwd->bv_val ); passwd->bv_val = NULL; passwd->bv_len = 0; fclose( f ); return -1; } nread += nr; nleft -= nr; } while ( !feof(f) ); passwd->bv_len = nread; passwd->bv_val[nread] = '\0'; fclose( f ); return 0; }