mirror of
https://github.com/Scandal-UK/Incognito_RCM.git
synced 2024-11-08 13:11:52 +00:00
Refactored checksum code into methods
This commit is contained in:
parent
9d0149ad28
commit
9506b6cf9a
1 changed files with 45 additions and 36 deletions
|
@ -119,6 +119,32 @@ unsigned short int get_crc_16 (const char *p, int n) {
|
|||
return(crc);
|
||||
}
|
||||
|
||||
u16 calculateCrc(u32 offset, u32 size)
|
||||
{
|
||||
const char buffer[size + 1];
|
||||
readData((u8 *)buffer, offset, size, NULL);
|
||||
return get_crc_16(buffer, size);
|
||||
}
|
||||
|
||||
u16 readCrc(u32 offset)
|
||||
{
|
||||
u16 buffer;
|
||||
readData((u8 *)&buffer, offset, sizeof(u16), NULL);
|
||||
return buffer;
|
||||
}
|
||||
|
||||
bool validateCrc(u32 offset, u32 size)
|
||||
{
|
||||
return calculateCrc(offset, size) == readCrc(offset + size);
|
||||
}
|
||||
|
||||
bool calculateAndWriteCrc(u32 offset, u32 size)
|
||||
{
|
||||
u16 crcValue = calculateCrc(offset, size);
|
||||
u8 crc[2] = { crcValue & 0xff, crcValue >> 8 }; // bytes of u16
|
||||
return writeData(crc, offset + size, sizeof(u16), NULL);
|
||||
}
|
||||
|
||||
bool dump_keys()
|
||||
{
|
||||
display_backlight_brightness(100, 1000);
|
||||
|
@ -330,27 +356,17 @@ bool dump_keys()
|
|||
return false;
|
||||
}
|
||||
|
||||
char serial[31] = "";
|
||||
readData((u8 *)serial, 0x250, 30, NULL);
|
||||
u32 serialOffset = 0x250;
|
||||
|
||||
char serial[15];
|
||||
readData((u8 *)serial, serialOffset, 14, NULL);
|
||||
|
||||
gfx_printf("%kCurrent serial: [%s]\n\n", COLOR_BLUE, serial);
|
||||
|
||||
// Determine stored crc
|
||||
u8 *storedCrc = (u8 *)calloc(2, sizeof(u8));
|
||||
readData((u8 *)storedCrc, 0x250 + 30, 2, NULL);
|
||||
|
||||
// Calculate crc
|
||||
const char *serialBytes = serial;
|
||||
u16 crcValue = get_crc_16(serialBytes, 30);
|
||||
u8 crc[2] = { crcValue & 0xff, crcValue >> 8 }; // bytes of u16
|
||||
|
||||
// Validate crc
|
||||
if (memcmp(storedCrc, crc, 0x2) == 0)
|
||||
gfx_printf("%kValid serial crc\n", COLOR_GREEN);
|
||||
if (validateCrc(serialOffset, 0x1E))
|
||||
gfx_printf("%kValid serial checksum\n", COLOR_GREEN);
|
||||
else
|
||||
gfx_printf("%kWarning - invalid serial crc\n", COLOR_RED);
|
||||
|
||||
free(storedCrc);
|
||||
gfx_printf("%kWarning - invalid serial checksum\n", COLOR_RED);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
@ -380,24 +396,9 @@ bool writeSerial()
|
|||
return false;
|
||||
|
||||
// write crc at end of serial-number block
|
||||
return writeCrc(serialOffset, 0x1E);
|
||||
return calculateAndWriteCrc(serialOffset, 0x1E);
|
||||
}
|
||||
|
||||
bool writeCrc(u32 offset, u32 size)
|
||||
{
|
||||
char buffer[size + 1];
|
||||
if (!readData((u8 *)buffer, offset, size, NULL))
|
||||
return false;
|
||||
|
||||
const char *bytes = buffer;
|
||||
free(buffer);
|
||||
u16 crcValue = get_crc_16(bytes, size);
|
||||
u8 crc[2] = { crcValue & 0xff, crcValue >> 8 }; // bytes of u16
|
||||
|
||||
return writeData(crc, offset + size, 2, NULL);
|
||||
}
|
||||
|
||||
// todo: write a method to add a crc!
|
||||
// todo: include crc block in sizes
|
||||
bool incognito()
|
||||
{
|
||||
|
@ -412,11 +413,14 @@ bool incognito()
|
|||
gfx_printf("%kWriting fake serial...\n", COLOR_YELLOW);
|
||||
if (!writeSerial())
|
||||
return false;
|
||||
/* // NOTE: This is crashing Atmosphere...
|
||||
/*
|
||||
gfx_printf("%kErasing ECC-B233 device cert...\n", COLOR_YELLOW);
|
||||
if (!erase(0x0480, 0x180)) // (size 0x190 to include crc)
|
||||
return false;
|
||||
*/
|
||||
// if (!writeCrc(0x0480, 0x180)) // whatever I do it crashes Atmos..!
|
||||
// return false;
|
||||
|
||||
gfx_printf("%kErasing SSL cert...\n", COLOR_YELLOW);
|
||||
if (!erase(0x0AE0, 0x800))
|
||||
return false;
|
||||
|
@ -441,11 +445,11 @@ bool incognito()
|
|||
if (!erase(0x3FC0, 0x240))
|
||||
return false;
|
||||
|
||||
gfx_printf("%kWriting client cert hash...\n", COLOR_YELLOW);
|
||||
gfx_printf("%kWriting SSL cert hash...\n", COLOR_YELLOW);
|
||||
if (!writeClientCertHash())
|
||||
return false;
|
||||
|
||||
gfx_printf("%kWriting CAL0 hash...\n", COLOR_YELLOW);
|
||||
gfx_printf("%kWriting body hash...\n", COLOR_YELLOW);
|
||||
if (!writeCal0Hash())
|
||||
return false;
|
||||
|
||||
|
@ -993,6 +997,11 @@ bool restoreProdinfo()
|
|||
goto out;
|
||||
}
|
||||
|
||||
if (validateCrc(0x250, 0x1E))
|
||||
gfx_printf("%kValid serial checksum\n", COLOR_GREEN);
|
||||
else
|
||||
gfx_printf("%kWarning - invalid serial checksum\n", COLOR_RED);
|
||||
|
||||
result = true;
|
||||
gfx_printf("\n%kRestore from %s done!\n\n", COLOR_GREEN, name);
|
||||
out:
|
||||
|
|
Loading…
Reference in a new issue