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// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <unistd.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <time.h>
#include <openssl/sha.h>
#include <errno.h>
#include <stdbool.h>
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
#define ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
static void sha256(const void *buf, int len, void *out)
{
SHA256_CTX sha256;
SHA256_Init(&sha256);
SHA256_Update(&sha256, buf, len);
SHA256_Final(out, &sha256);
}
static void sha512(const void *buf, int len, void *out)
{
SHA512_CTX sha512;
SHA512_Init(&sha512);
SHA512_Update(&sha512, buf, len);
SHA512_Final(out, &sha512);
}
#define NEWIDB_MAGIC 0x534e4b52 /* 'RKNS' */
struct newidb_entry {
uint32_t sector;
uint32_t unknown_ffffffff;
uint32_t unknown1;
uint32_t image_number;
unsigned char unknown2[8];
unsigned char hash[64];
};
struct newidb {
uint32_t magic;
unsigned char unknown1[4];
uint32_t n_files;
uint32_t hashtype;
unsigned char unknown2[8];
unsigned char unknown3[8];
unsigned char unknown4[88];
struct newidb_entry entries[4];
unsigned char unknown5[40];
unsigned char unknown6[512];
unsigned char unknown7[16];
unsigned char unknown8[32];
unsigned char unknown9[464];
unsigned char hash[512];
};
#define SECTOR_SIZE 512
#define PAGE_SIZE 2048
typedef enum {
HASH_TYPE_SHA256 = 1,
HASH_TYPE_SHA512 = 2,
} hash_type_t;
struct rkcode {
const char *path;
size_t size;
void *buf;
};
static int n_code;
struct rkcode *code;
static int create_newidb(struct newidb *idb)
{
hash_type_t hash_type = HASH_TYPE_SHA256;
bool keep_cert = false;
int image_offset;
int i;
unsigned char *idbu8 = (void *)idb;
idb->magic = NEWIDB_MAGIC;
idb->n_files = (n_code << 16) | (1 << 7) | (1 << 8);
if (hash_type == HASH_TYPE_SHA256)
idb->hashtype = (1 << 0);
else if (hash_type == HASH_TYPE_SHA512)
idb->hashtype = (1 << 1);
if (!keep_cert)
image_offset = 4;
else
image_offset = 8;
for (i = 0; i < n_code; i++) {
struct newidb_entry *entry = &idb->entries[i];
struct rkcode *c = &code[i];
unsigned int image_sector;
image_sector = c->size / SECTOR_SIZE;
entry->sector = (image_sector << 16) + image_offset;
entry->unknown_ffffffff = 0xffffffff;
entry->image_number = i + 1;
if (hash_type == HASH_TYPE_SHA256)
sha256(c->buf, c->size, entry->hash); /* File size padded to sector size */
else if (hash_type == HASH_TYPE_SHA512)
sha512(c->buf, c->size, entry->hash);
image_offset += image_sector;
}
if (hash_type == HASH_TYPE_SHA256)
sha256(idbu8, 1535, idbu8 + 1536);
else if (hash_type == HASH_TYPE_SHA512)
sha512(idbu8, 1535, idbu8 + 1536);
return 0;
}
struct option cbootcmd[] = {
{"help", 0, NULL, 'h'},
{"o", 1, NULL, 'o'},
{0, 0, 0, 0},
};
static void usage(const char *prgname)
{
printf(
"Usage: %s [OPTIONS] <FILES>\n"
"\n"
"Generate a Rockchip boot image from <FILES>\n"
"This tool is suitable for SoCs beginning with rk3568. Older SoCs\n"
"have a different image format.\n"
"\n"
"Options:\n"
" -o <file> Output image to <file>\n"
" -h This help\n",
prgname);
}
static int read_full(int fd, void *buf, size_t size)
{
size_t insize = size;
int now;
int total = 0;
while (size) {
now = read(fd, buf, size);
if (now == 0)
return total;
if (now < 0)
return now;
total += now;
size -= now;
buf += now;
}
return insize;
}
static int write_full(int fd, void *buf, size_t size)
{
size_t insize = size;
int now;
while (size) {
now = write(fd, buf, size);
if (now <= 0)
return now;
size -= now;
buf += now;
}
return insize;
}
int main(int argc, char *argv[])
{
int opt, i, fd;
const char *outfile = NULL;
struct newidb idb = {};
while ((opt = getopt_long(argc, argv, "ho:", cbootcmd, NULL)) > 0) {
switch (opt) {
case 'o':
outfile = optarg;
break;
case 'h':
usage(argv[0]);
exit(0);
}
}
n_code = argc - optind;
if (!n_code) {
usage(argv[0]);
exit(1);
}
code = calloc(n_code, sizeof(*code));
if (!code)
exit(1);
for (i = 0; i < n_code; i++) {
struct stat s;
int fd, ret;
struct rkcode *c = &code[i];
const char *path = argv[i + optind];
fd = open(path, O_RDONLY);
if (fd < 0) {
fprintf(stderr, "Cannot open %s: %s\n", path, strerror(errno));
exit(1);
}
ret = fstat(fd, &s);
if (ret)
exit(1);
c->path = path;
c->size = ALIGN(s.st_size, PAGE_SIZE);
c->buf = calloc(c->size, 1);
if (!c->buf)
exit(1);
read_full(fd, c->buf, s.st_size);
close(fd);
}
create_newidb(&idb);
fd = creat(outfile, 0644);
if (fd < 0) {
fprintf(stderr, "Cannot open %s: %s\n", outfile, strerror(errno));
exit(1);
}
write_full(fd, &idb, sizeof(idb));
for (i = 0; i < n_code; i++) {
struct rkcode *c = &code[i];
write_full(fd, c->buf, c->size);
}
close(fd);
return 0;
}
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