diff options
Diffstat (limited to 'utils/AMS')
| -rw-r--r-- | utils/AMS/hacking/mkamsboot.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/utils/AMS/hacking/mkamsboot.c b/utils/AMS/hacking/mkamsboot.c index f5c2f35d36..0aad8e8e35 100644 --- a/utils/AMS/hacking/mkamsboot.c +++ b/utils/AMS/hacking/mkamsboot.c @@ -76,6 +76,12 @@ compressed image is stored at the end of the destination buffer. #define PAD_TO_BOUNDARY(x) (((x) + 0x1ff) & ~0x1ff) +/* This magic should appear at the start of any UCL file */ +static const unsigned char uclmagic[] = { + 0x00, 0xe9, 0x55, 0x43, 0x4c, 0xff, 0x01, 0x1a +}; + + static off_t filesize(int fd) { struct stat buf; @@ -92,6 +98,12 @@ static uint32_t get_uint32le(unsigned char* p) return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24); } +static uint32_t get_uint32be(unsigned char* p) +{ + return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]; + +} + static void put_uint32le(unsigned char* p, uint32_t x) { p[0] = x & 0xff; @@ -123,6 +135,7 @@ int main(int argc, char* argv[]) char *infile, *uclfile, *bootfile, *uclunpackfile, *outfile; int fdin, fducl, fdboot, fduclunpack, fdout; off_t len; + unsigned char uclheader[26]; uint32_t n; unsigned char* buf; uint32_t firmware_size; @@ -173,8 +186,29 @@ int main(int argc, char* argv[]) return 1; } - ucl_size = filesize(fducl); + /* Some UCL file sanity checks */ + n = read(fducl, uclheader, sizeof(uclheader)); + + if (n != sizeof(uclheader)) { + fprintf(stderr,"[ERR] Could not read header from UCL file\n"); + return 1; + } + if (memcmp(uclmagic, uclheader, sizeof(uclmagic))!=0) { + fprintf(stderr,"[ERR] Invalid UCL file\n"); + return 1; + } + + if (uclheader[12] != 0x2e) { + fprintf(stderr,"[ERR] Unsupported UCL encryption format (0x%02x) - only 0x2e supported.\n",uclheader[12]); + return 1; + } + ucl_size = get_uint32be(&uclheader[22]) + 8; + + if (ucl_size + 26 > filesize(fducl)) { + fprintf(stderr, "[ERR] Size mismatch in UCL file\n"); + return 1; + } /* Open the firmware file */ fdin = open(infile,O_RDONLY|O_BINARY); |