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crypto.c
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/*
mini - a Free Software replacement for the Nintendo/BroadOn IOS.
crypto hardware support
Copyright (C) 2008, 2009Haxx Enterprises <bushing@gmail.com>
Copyright (C) 2008, 2009Sven Peter <svenpeter@gmail.com>
# This code is licensed to you under the terms of the GNU GPL, version 2;
# see file COPYING or http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
*/
#include"crypto.h"
#include"hollywood.h"
#include"utils.h"
#include"memory.h"
#include"irq.h"
#include"ipc.h"
#include"gecko.h"
#include"string.h"
#include"seeprom.h"
#defineAES_CMD_RESET0
#defineAES_CMD_DECRYPT0x9800
otp_totp;
seeprom_tseeprom;
voidcrypto_read_otp(void)
{
u32*otpd= (u32*)&otp;
inti;
for (i=0;i<0x20;i++) {
write32(HW_OTPCMD,0x80000000|i);
*otpd++=read32(HW_OTPDATA);
}
}
voidcrypto_read_seeprom(void)
{
seeprom_read(&seeprom,0,sizeof(seeprom) /2);
}
voidcrypto_initialize(void)
{
crypto_read_otp();
crypto_read_seeprom();
write32(AES_CMD,0);
while (read32(AES_CMD)!=0);
irq_enable(IRQ_AES);
}
voidcrypto_ipc(volatileipc_request*req)
{
switch (req->req) {
caseIPC_KEYS_GETOTP:
memcpy((void*)req->args[0],&otp,sizeof(otp));
dc_flushrange((void*)req->args[0],sizeof(otp));
break;
caseIPC_KEYS_GETEEP:
memcpy((void*)req->args[0],&seeprom,sizeof(seeprom));
dc_flushrange((void*)req->args[0],sizeof(seeprom));
break;
default:
gecko_printf("IPC: unknown SLOW CRYPTO request %04x\n",
req->req);
}
ipc_post(req->code,req->tag,0);
}
staticint_aes_irq=0;
voidaes_irq(void)
{
_aes_irq=1;
}
staticinlinevoidaes_command(u16cmd,u8iv_keep,u32blocks)
{
if (blocks!=0)
blocks--;
_aes_irq=0;
write32(AES_CMD, (cmd <<16) | (iv_keep ?0x1000 :0) | (blocks&0x7f));
while (read32(AES_CMD)&0x80000000);
}
voidaes_reset(void)
{
write32(AES_CMD,0);
while (read32(AES_CMD)!=0);
}
voidaes_set_iv(u8*iv)
{
inti;
for(i=0;i<4;i++) {
write32(AES_IV,*(u32*)iv);
iv+=4;
}
}
voidaes_empty_iv(void)
{
inti;
for(i=0;i<4;i++)
write32(AES_IV,0);
}
voidaes_set_key(u8*key)
{
inti;
for(i=0;i<4;i++) {
write32(AES_KEY,*(u32*)key);
key+=4;
}
}
voidaes_decrypt(u8*src,u8*dst,u32blocks,u8keep_iv)
{
intthis_blocks=0;
while(blocks>0) {
this_blocks=blocks;
if (this_blocks>0x80)
this_blocks=0x80;
write32(AES_SRC,dma_addr(src));
write32(AES_DEST,dma_addr(dst));
dc_flushrange(src,blocks*16);
dc_invalidaterange(dst,blocks*16);
ahb_flush_to(AHB_AES);
aes_command(AES_CMD_DECRYPT,keep_iv,this_blocks);
ahb_flush_from(AHB_AES);
ahb_flush_to(AHB_STARLET);
blocks-=this_blocks;
src+=this_blocks<<4;
dst+=this_blocks<<4;
keep_iv=1;
}
}
voidaes_ipc(volatileipc_request*req)
{
switch (req->req) {
caseIPC_AES_RESET:
aes_reset();
break;
caseIPC_AES_SETIV:
aes_set_iv((u8*)req->args);
break;
caseIPC_AES_SETKEY:
aes_set_key((u8*)req->args);
break;
caseIPC_AES_DECRYPT:
aes_decrypt((u8*)req->args[0], (u8*)req->args[1],
req->args[2],req->args[3]);
break;
default:
gecko_printf("IPC: unknown SLOW AES request %04x\n",
req->req);
}
ipc_post(req->code,req->tag,0);
}