diff options
Diffstat (limited to '')
-rw-r--r-- | libraries/liblutil/passfile.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/libraries/liblutil/passfile.c b/libraries/liblutil/passfile.c new file mode 100644 index 0000000..666b718 --- /dev/null +++ b/libraries/liblutil/passfile.c @@ -0,0 +1,110 @@ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2022 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 + * <http://www.OpenLDAP.org/license.html>. + */ + +#include "portable.h" + +#include <stdio.h> + +#include <ac/stdlib.h> +#include <ac/ctype.h> +#include <ac/string.h> + +#ifdef HAVE_FSTAT +#include <sys/types.h> +#include <sys/stat.h> +#endif /* HAVE_FSTAT */ + +#include <lber.h> +#include <lutil.h> + +/* 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; +} |