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We need to strip the header (26 bytes) from the UCL file - based on the information in tools/ucl2src.pl. Also add some sanity checking of the UCL file.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18677 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Chapman 2008-10-01 18:28:55 +00:00
parent 5891a38486
commit fc7221649d
1 changed files with 35 additions and 1 deletions
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36
utils/AMS/hacking/mkamsboot.c
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@ -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);