/*************************************************************************
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> File Name: rkimage.cpp
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> Author: jkand.huang
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> Mail: jkand.huang@rock-chips.com
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> Created Time: Tue 30 Oct 2018 09:56:15 AM CST
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************************************************************************/
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#include <stdio.h>
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#include "rkimage.h"
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "log.h"
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#include <errno.h>
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#include "data.h"
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#include "partition.h"
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#include "md5sum.h"
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#define DEBUG_READ_IMAGE 0
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void display_RKIMAGE_ITEM(RKIMAGE_ITEM *item){
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//char name[PART_NAME];
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//char file[RELATIVE_PATH];
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//unsigned int offset;
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//unsigned int flash_offset;
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//unsigned int usespace;
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//unsigned int size;
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LOGD("name = %s", item->name);
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LOGD("file = %s", item->file);
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LOGD("offset = %d", item->offset);
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LOGD("flash_offset = %d", item->flash_offset);
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LOGD("usespace = %d", item->usespace);
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LOGD("size = %d", item->size);
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}
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void display_RKIMAGE_HDR(RKIMAGE_HDR* hdr){
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//unsigned int tag;
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//unsigned int size;
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//char machine_model[MAX_MACHINE_MODEL];
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//char manufacturer[MAX_MANUFACTURER];
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//unsigned int version;
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//int item_count;
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//RKIMAGE_ITEM item[MAX_PACKAGE_FILES];
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LOGD("tag = %d", hdr->tag);
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LOGD("size = %d", hdr->size);
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LOGD("machine_model = %s", hdr->machine_model);
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LOGD("manufacturer = %s", hdr->manufacturer);
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LOGD("version = %d", hdr->version);
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for(int i = 0; i < hdr->item_count; i++){
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LOGI("================================================");
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display_RKIMAGE_ITEM(&(hdr->item[i]));
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}
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}
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void adjustFileOffset(RKIMAGE_HDR* hdr, int offset)
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{
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for(int i = 0; i< hdr->item_count; i++)
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hdr->item[i].offset += offset;
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return;
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}
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unsigned int gFwOffset = 0;
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int CheckImageFile(const char* path, RKIMAGE_HDR* hdr){
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/* Try to open the image.
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*/
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int fd = open(path, O_RDONLY);
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if (fd < 0) {
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LOGE("Can't open %s\n", path);
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return -1;
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}
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/* Need to read the documents before 512 bytes,
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* to determine whether the new way of packing update.
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* If not be, according to the way to handle before then
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* If the new packaging mode, the firmware of the offset each file to adjust accordingly
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*
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*/
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gFwOffset = 0;
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char buf[512] = "";
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unsigned int fwSize = 0;
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unsigned int fileSize = 0;
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int m_signMd5Size;
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unsigned char m_md5[32];
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if(read(fd, buf, 512) != 512)
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{
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LOGE("Can't read %s\n(%s)\n", path, strerror(errno));
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close(fd);
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return -2;
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}
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// Confirm whether the new packaging format
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if(*((unsigned int*)buf) == 0x57464B52)
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{
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gFwOffset = *(unsigned int*)(buf+0x21);
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fwSize = *(unsigned int *)(buf + 0x25);
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}
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fileSize = lseek(fd, 0L, SEEK_END);
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LOGE("fileSize is %d.\n", fileSize);
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if(lseek(fd, -32, SEEK_END) == -1){
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LOGE("lseek failed.\n");
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return -2;
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}
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if(read(fd, m_md5, 32) != 32){
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LOGE("Can't read %s\n(%s)\n", path, strerror(errno));
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close(fd);
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return -2;
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}
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if(lseek(fd, gFwOffset, SEEK_SET) == -1){
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LOGE("lseek failed.\n");
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return -2;
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}
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if(read(fd, (char*)hdr, sizeof(RKIMAGE_HDR)) != sizeof(RKIMAGE_HDR)){
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LOGE("Can't read %s\n(%s)\n", path, strerror(errno));
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close(fd);
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return -2;
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}
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close(fd);
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if(hdr->tag != RKIMAGE_TAG)
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{
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LOGI("tag: %x\n", hdr->tag);
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LOGE("Invalid image\n");
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return -3;
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}
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if(!compareMd5sum((char*)path, m_md5, 0, fileSize-32)){
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LOGE("Md5Check update.img fwSize:%ld", fileSize-32);
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return -1;
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}
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if(gFwOffset)
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adjustFileOffset(hdr, gFwOffset);
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display_RKIMAGE_HDR(hdr);
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return 0;
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}
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