Changeset View
Changeset View
Standalone View
Standalone View
lib/libc/secure/__strcpy_chk.c
- This file was added.
| /*- | |||||
| * Copyright (C) 2012 The Android Open Source Project | |||||
| * All rights reserved. | |||||
| * | |||||
| * Redistribution and use in source and binary forms, with or without | |||||
| * modification, are permitted provided that the following conditions | |||||
| * are met: | |||||
| * * Redistributions of source code must retain the above copyright | |||||
| * notice, this list of conditions and the following disclaimer. | |||||
| * * 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. | |||||
| * | |||||
| * 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 OWNER 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. | |||||
| * | |||||
| * bionic rev: d807b9a12d3e49132b095df3d883618452033b51 | |||||
| * | |||||
| * $FreeBSD$ | |||||
| */ | |||||
| #undef _FORTIFY_SOURCE | |||||
| #include <sys/cdefs.h> | |||||
| #include <secure/security.h> | |||||
| #include <string.h> | |||||
| #include <stdlib.h> | |||||
| #include "secure/_string.h" | |||||
| char * | |||||
| __strcpy_chk(char *dest, const char *src, size_t dest_len) | |||||
| { | |||||
| /* TODO: optimize so we don't scan src twice. */ | |||||
| size_t src_len; | |||||
| /* | |||||
| * Compiler doesn 't know destination size. | |||||
| * Fallback to the original function. | |||||
| */ | |||||
| if (dest_len == __FORTIFY_UNKNOWN_SIZE) | |||||
| return (strcpy(dest, src)); | |||||
| src_len = strlen(src) + 1; | |||||
| if (__predict_false(src_len > dest_len)) | |||||
| __fortify_chk_fail( | |||||
| "strcpy: prevented write past end of buffer"); | |||||
| return (strcpy(dest, src)); | |||||
| } | |||||