From 1c79796a523255af5d012fa3cbc5400131b3b8b9 Mon Sep 17 00:00:00 2001 From: zhang sanshan Date: Mon, 15 May 2017 10:45:07 +0800 Subject: MA-9409-1 enable avb on android things. Fix issue for API changed from v2017. porting below patch from v2016. commit 44834fd12f60a090e3d10ab6f84a75460894d49d Change-Id: Ifaf0b86dd29648f9150646f00f54502676df9013 Signed-off-by: zhang sanshan --- lib/avb/libavb/avb_kernel_cmdline_descriptor.c | 58 ++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 lib/avb/libavb/avb_kernel_cmdline_descriptor.c (limited to 'lib/avb/libavb/avb_kernel_cmdline_descriptor.c') diff --git a/lib/avb/libavb/avb_kernel_cmdline_descriptor.c b/lib/avb/libavb/avb_kernel_cmdline_descriptor.c new file mode 100644 index 0000000..67521f2 --- /dev/null +++ b/lib/avb/libavb/avb_kernel_cmdline_descriptor.c @@ -0,0 +1,58 @@ +/* + * Copyright (C) 2016 The Android Open Source Project + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, + * modify, merge, publish, distribute, sublicense, and/or sell copies + * of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "avb_kernel_cmdline_descriptor.h" +#include "avb_util.h" + +bool avb_kernel_cmdline_descriptor_validate_and_byteswap( + const AvbKernelCmdlineDescriptor* src, AvbKernelCmdlineDescriptor* dest) { + uint64_t expected_size; + + avb_memcpy(dest, src, sizeof(AvbKernelCmdlineDescriptor)); + + if (!avb_descriptor_validate_and_byteswap((const AvbDescriptor*)src, + (AvbDescriptor*)dest)) + return false; + + if (dest->parent_descriptor.tag != AVB_DESCRIPTOR_TAG_KERNEL_CMDLINE) { + avb_error("Invalid tag for kernel cmdline descriptor.\n"); + return false; + } + + dest->flags = avb_be32toh(dest->flags); + dest->kernel_cmdline_length = avb_be32toh(dest->kernel_cmdline_length); + + /* Check that kernel_cmdline is fully contained. */ + expected_size = sizeof(AvbKernelCmdlineDescriptor) - sizeof(AvbDescriptor); + if (!avb_safe_add_to(&expected_size, dest->kernel_cmdline_length)) { + avb_error("Overflow while adding up sizes.\n"); + return false; + } + if (expected_size > dest->parent_descriptor.num_bytes_following) { + avb_error("Descriptor payload size overflow.\n"); + return false; + } + + return true; +} -- cgit v1.1