|
05-12-2011, 05:05 AM
|
|
Jaguar
|
|
Join Date: Jan 2009
Posts: 73
|
|
Quote:
Originally Posted by andyvand
That is because the patched binaries still have code signatures inside.
I once released on InsanelyMac a tutorial on how to remove them from the binaries (No more clearing CS_VALID messages...)
I suppose those messages aren't the worst but if I had an AMD system I would patch up....
As for the rebooting problem: why not fix it with a customized FADT.aml ACPI table override?
|
I am patching launchctl (terminal app), but afterward it complain of code signing
Andy Vandijck did post some post about "removing code signatures", and did an amd_insn_patcher (with source code), but I don't understand whats the code is doing, I could run it through debugger, but if anyone knows this faster than me and would like to answer.
I searched insanelymac for Andy Vandijck's post about this, but can't find it, maybe its deleted for DCMA?
Code:
kern_return_t remove_code_signature_64(uint8_t *data)
{
struct mach_header_64 *mh_64 = (struct mach_header_64 *)data;
struct load_command *tmplc = (struct load_command *)(data + sizeof(struct mach_header_64));
uint32_t curlc = 0;
uint32_t totlc = mh_64->ncmds;
uint32_t curoff = sizeof(struct mach_header_64);
struct linkedit_data_command *cryptsiglc = (struct linkedit_data_command *)0;
uint8_t *cryptsigdata = (uint8_t *)0;
uint32_t cryptsigdatasize = 0;
uint32_t zeroeddata = 0;
/* Get code signature load command + divide */
while (curlc < totlc)
{
if (tmplc->cmd == LC_CODE_SIGNATURE)
{
cryptsiglc = (struct linkedit_data_command *)(data + curoff);
break;
}
curoff += tmplc->cmdsize;
tmplc = (struct load_command *)(data + curoff);
++curlc;
}
/* Safety check */
if (cryptsiglc == 0)
{
printf("No code signature found, skipping patch\n");
return KERN_FAILURE;
}
cryptsigdata = (uint8_t *)(data + cryptsiglc->dataoff);
/* Zero code signature... */
while (zeroeddata < cryptsiglc->datasize)
{
*cryptsigdata = 0;
++zeroeddata;
++cryptsigdata;
}
/* Reduce the number of load commands + load command size */
mh_64->ncmds -= 1;
mh_64->sizeofcmds -= cryptsiglc->cmdsize;
/* Zero out load command of LC_CODE_SIGNATURE */
cryptsiglc->cmd = 0;
cryptsiglc->cmdsize = 0;
cryptsiglc->dataoff = 0;
cryptsiglc->datasize = 0;
printf("Code signature removed succesfully (64bit)");
return KERN_SUCCESS;
}
|