freemyipod r156 - Code Review

Repository:	freemyipod
Revision:	< r155‎ \| r156 \| r157 >
Date:	14:18, 18 August 2010
Author:	theseven
Status:	new
Tags:
Comment:	Fix hardware key AES
Modified paths:	/embios/trunk/target/ipodnano2g/hwkeyaes.c (modified) (history)

Diff [purge]

Index: embios/trunk/target/ipodnano2g/hwkeyaes.c
—	—	@@ -42,7 +42,6 @@
43	43	AESINSIZE = 0x10;
44	44	AESSIZE3 = 0x10;
45	45	ptr = direction == HWKEYAES_ENCRYPT ? 0 : (size >> 2) - 4;
46		~~- clean_dcache();~~
47	46	while (true)
48	47	{
49	48	if (direction == HWKEYAES_ENCRYPT)
—	—	@@ -55,16 +54,20 @@
56	55	AESOUTADDR = (uint32_t)data + (ptr << 2);
57	56	AESINADDR = (uint32_t)data + (ptr << 2);
58	57	AESAUXADDR = (uint32_t)data + (ptr << 2);
	58	+ clean_dcache();
59	59	AESSTATUS = 6;
60	60	AESGO = go;
61	61	go = 3;
62	62	while ((AESSTATUS & 6) == 0) yield();
	63	+ invalidate_dcache();
63	64	if (direction == HWKEYAES_DECRYPT)
	65	+ {
	66	+ if (!ptr) break;
64	67	for (i = 0; i < 4; i++)
65	68	((uint32_t)data)[ptr + i] ^= ((uint32_t)data)[ptr + i - 4];
	69	+ }
66	70	ptr += direction == HWKEYAES_ENCRYPT ? 4 : -4;
67	71	}
68		~~- invalidate_dcache();~~
69	72	AESCONTROL = 0;
70	73	PWRCON(1) \|= 0x400;
71	74	}