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authorDave Chapman <dave@dchapman.com>2008-10-01 18:28:55 +0000
committerDave Chapman <dave@dchapman.com>2008-10-01 18:28:55 +0000
commitfc7221649da67f3e5a49f56916fdbf64455d9f99 (patch)
tree60cf58f910812db2b626069bfade2c6ea273c268 /utils/AMS
parent5891a384867e05016a24bcbe4b0963f795fe8dbe (diff)
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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.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18677 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'utils/AMS')
-rw-r--r--utils/AMS/hacking/mkamsboot.c36
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);