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facetimehd: Add new firmware extraction scripts

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And remove the broken ones.

Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
This commit is contained in:
Patrik Jakobsson
2015-12-06 15:20:42 +01:00
parent 2b45fb581a
commit 6a120799f1
3 changed files with 35 additions and 110 deletions
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102
firmware/decompress.c
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@@ -1,102 +0,0 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "zlib.h"
#define IN_BYTES 599113
#define OUT_BYTES 1413124
/*
* Inflates firmware image extracted from S2ISPFIRMWARE segment of AppleCameraInterface
* Tested only with version 5.23.0 of com.apple.driver.AppleCameraInterface from OS X 10.10.1
*/
int main(int argc, char** argv) {
unsigned char *buf_in, *buf_out;
size_t buf_in_size;
FILE *ip, *op;
z_stream strm;
int ret = 0;
if (argc != 3) {
printf("Usage: decompress <input> <output>");
ret = -1;
goto end;
}
if (!(ip = fopen(argv[1], "rb"))) {
printf("Error: Cannot open %s!", argv[1]);
ret = -1;
goto end;
}
fseek(ip, 0, SEEK_END);
buf_in_size = ftell(ip);
if (!(buf_in = malloc(buf_in_size))) {
printf("Error: Cannot allocate input buffer of size %zu!", buf_in_size);
ret = -1;
goto end_in;
}
rewind(ip);
if (fread(buf_in, sizeof(*buf_in), buf_in_size / sizeof(*buf_in), ip) != buf_in_size / sizeof(*buf_in)) {
perror(NULL);
printf("Error: Cannot read %zu bytes!", buf_in_size);
ret = -1;
goto end_in;
}
memset(&strm, Z_NULL, sizeof(strm));
strm.avail_in = IN_BYTES;
// zlib and gzip decoding with automatic header detection
if (inflateInit2_(&strm, 15 + 32, "1.2.3", 112) != Z_OK) {
printf("Error: Cannot initialize inflate!");
ret = -1;
goto end_in;
}
if (!(buf_out = malloc(OUT_BYTES))) {
printf("Error: Cannot allocate output buffer!");
ret = -1;
goto end_out;
}
strm.next_in = buf_in;
strm.avail_out = OUT_BYTES;
strm.next_out = buf_out;
if (!strm.avail_in || inflate(&strm, Z_NO_FLUSH) != Z_STREAM_END || strm.avail_out) {
printf("Error: Deflate not successful!");
ret = -1;
goto end_inflate;
}
if (!(op = fopen(argv[2], "wb"))) {
printf("Error: Cannot open %s!", argv[2]);
ret = -1;
goto end_inflate;
}
if (fwrite(buf_out, sizeof(*buf_out), OUT_BYTES / sizeof(*buf_out), op) != OUT_BYTES / sizeof(*buf_out)) {
printf("Error: Cannot write to output file!");
ret = -1;
}
fclose(op);
end_inflate:
inflateEnd(&strm);
end_out:
free(buf_out);
end_in:
free(buf_in);
fclose(ip);
end:
return ret;
}

8
firmware/extract.sh
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@@ -1,8 +0,0 @@
#!/bin/bash -e
IN=/System/Library/Extensions/AppleCameraInterface.kext/Contents/MacOS/AppleCameraInterface
gcc decompress.c -o decompress -lz -Wall
segedit "$IN" -extract __DATA S2ISPFIRMWARE firmware.raw
#objcopy -O binary --only-section=__DATA.S2ISPFIRMWARE "$IN" firmware.raw
./decompress firmware.raw firmware.bin

35
firmware/extract_from_osx.sh Executable file
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@@ -0,0 +1,35 @@
#!/bin/bash
IN=AppleCameraInterface
OUT=firmware.bin
OSX_HASH=d1db66d71475687a5873dab10a345e2d
FW_HASH=4e1d11e205e5c55d128efa0029b268fe
HASH=$(md5sum $IN | awk '{ print $1 }')
OFFSET=81920
SIZE=603715
if [ "$OSX_HASH" != "$HASH" ]
then
echo -e "Mismatching driver hash for $IN ($HASH)"
echo -e "No firmware extracted!"
exit 1
fi
echo -e "Found matching hash ($HASH)"
dd bs=1 skip=$OFFSET count=$SIZE if=$IN of=$OUT.gz &> /dev/null
gunzip $OUT.gz
RESULT=$(md5sum $OUT | awk '{ print $1 }')
if [ "$RESULT" != "$FW_HASH" ]
then
echo -e "Firmware hash mismatch ($RESULT)"
echo -e "No firmware extracted!"
exit 1;
fi
echo -e "Firmware successfully extracted ($RESULT)"
exit 0