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Merge pull request #2203 from herjulf/AES128HW 

Atmel radio AES128 crypto engine support.
This commit is contained in:
Nicolas Tsiftes 2017-06-22 14:14:17 +02:00 committed by GitHub
parent d53b6ad23e e97f3bca26
commit f0bddb277c
8 changed files with 413 additions and 0 deletions
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18
cpu/avr/radio/rf230bb/atmega128rfa1_registermap.h
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@ -88,6 +88,24 @@
#define RG_XAH_CTRL_1 (0x157)
#define SR_AACK_PROM_MODE 0x157, 0x02, 1
#define RG_AES_KEY (0x13F)
#define SR_AES_KEY 0x13F, 0xff, 0
#define RG_AES_STATE (0x13E)
#define SR_AES_STATE 0x13E, 0xff, 0
#define RG_AES_STATUS (0x13D)
#define SR_AES_STATUS 0x13D, 0xff, 0
#define SR_AES_STATUS_DONE 0x13D, 0x01, 0
#define SR_AES_STATUS_ERR 0x13D, 0x80, 7
#define RG_AES_CNTRL (0x13C)
#define SR_AES_CNTRL 0x13C, 0xff, 0
#define SR_AES_CNTRL_IM 0x13C, 0x04, 2
#define SR_AES_CNTRL_DIR 0x13C, 0x08, 3
#define SR_AES_CNTRL_MODE 0x13C, 0x20, 5
#define SR_AES_CNTRL_REQUEST 0x13C, 0x80, 7
#define SR_IRQ_MASK 0x14e, 0xff, 0
/* RF230 register assignments, for reference */
#if 0
#define HAVE_REGISTER_MAP (1)

15
cpu/avr/radio/rf230bb/atmega256rfr2_registermap.h
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@ -229,6 +229,21 @@ Counter Compare Source
#define SR_CSMA_SEED_1 0x16e, 0x03, 0
#define SR_AACK_DIS_ACK 0x16e, 0x10, 4
#define RG_AES_KEY (0x13F)
#define SR_AES_KEY 0x13F, 0xff, 0
#define RG_AES_STATE (0x13E)
#define SR_AES_STATE 0x13E, 0xff, 0
#define RG_AES_STATUS (0x13D)
#define SR_AES_STATUS 0x13D, 0xff, 0
#define SR_AES_STATUS_DONE 0x13D, 0x01, 0
#define SR_AES_STATUS_ERR 0x13D, 0x80, 7
#define RG_AES_CNTRL (0x13C)
#define SR_AES_CNTRL 0x13C, 0xff, 0
#define SR_AES_CNTRL_IM 0x13C, 0x04, 2
#define SR_AES_CNTRL_DIR 0x13C, 0x08, 3
#define SR_AES_CNTRL_MODE 0x13C, 0x20, 5
#define SR_AES_CNTRL_REQUEST 0x13C, 0x80, 7
/* RF230 register assignments, for reference */
#if 1
//#define HAVE_REGISTER_MAP (1)

180
cpu/avr/radio/rf230bb/rf230bb.c
View File

@ -46,6 +46,7 @@
#if defined(__AVR__)
#include <avr/io.h>
#include <dev/watchdog.h>
//_delay_us has the potential to use floating point which brings the 256 byte clz table into RAM
//#include <util/delay.h>
@ -2100,4 +2101,183 @@ void rf230_start_sneeze(void) {
// while (hal_register_read(0x0f)!=1) {continue;} //wait for pll lock-hangs
hal_register_write(0x02,0x02); //Set TRX_STATE to TX_START
}
#endif
#ifdef AES_128_HW_CONF
#define IEEE_VECT 0
extern unsigned char aes_key[16];
extern unsigned char aes_p[];
extern unsigned char aes_c[];
extern unsigned char aes_s[];
extern unsigned char tmp[16];
/*
After PWR_SAVE sleep key is lost. We'll lock en/decyption to avoid
not to forced in to sleep while doing crypto. Also the key is hold
be the user so AES block should be reentrant. Encode/Docode och 128bit
(16 bytes) is promised to be less than 24us.
Note! Radio must be on to use the HW crypto engine. --ro
*/
static void
rf230_aes_write_key(unsigned char *key)
{
uint8_t i;
for(i = 0; i < 16; i++) {
hal_subregister_write(SR_AES_KEY, key[i]);
}
}
static void
rf230_aes_read_key(unsigned char *key)
{
uint8_t i;
for(i = 0; i < 16; i++) {
key[i] = hal_subregister_read(SR_AES_KEY);
}
}
static void
rf230_aes_write_state(unsigned char *state)
{
uint8_t i;
for(i = 0; i < 16; i++) {
hal_subregister_write(SR_AES_STATE, state[i]);
}
}
static void
rf230_aes_read_state(unsigned char *state)
{
uint8_t i;
for(i = 0; i < 16; i++) {
state[i] = hal_subregister_read(SR_AES_STATE);
}
}
static int
crypt(void)
{
uint8_t status;
hal_subregister_write(SR_AES_CNTRL_REQUEST, 1); /* Kick */
do {
watchdog_periodic();
status = hal_subregister_read(SR_AES_STATUS);
} while(status == 0);
if (hal_subregister_read(SR_AES_STATUS_ERR)) {
PRINTF("AES ERR\n");
return 0;
}
if (hal_subregister_read(SR_AES_STATUS_DONE)) {
PRINTF("AES DONE\n");
return 1;
}
return 0; /* Unknown */
}
int
rf230_aes_encrypt_cbc(unsigned char *key, unsigned char *plain, int len, unsigned char *mic)
{
uint8_t i;
uint8_t sreg;
int res;
sreg = SREG;
cli();
rf230_aes_write_key(key);
hal_subregister_write(SR_AES_CNTRL_MODE, 0); /* AES_MODE=0 -> ECB for 1:st block*/
hal_subregister_write(SR_AES_CNTRL_DIR, 0); /* AES_DIR=0 -> encryption */
/* write string to encrypt into buffer */
for(i = 0; i < 16; i++) {
AES_STATE = plain[i] ^ IEEE_VECT;
}
res = crypt();
if(!res)
goto out;
len -= 16;
/* Swiitch Mode */
hal_subregister_write(SR_AES_CNTRL_MODE, 1); /* AES_MODE=1 -> CBC */
hal_subregister_write(SR_AES_CNTRL_DIR, 0); /* AES_DIR=0 -> encryption */
while(len > 0) {
rf230_aes_write_state(plain);
res = crypt();
if(!res)
goto out;
len -= 16;
}
/* Read and retrun cipher */
rf230_aes_read_state(mic);
out:
SREG = sreg;
return res;
}
/* Electonic Code Block */
int
rf230_aes_encrypt_ebc(unsigned char *key, unsigned char *plain, unsigned char *cipher)
{
int res;
uint8_t sreg;
sreg = SREG;
cli();
rf230_aes_write_key(key);
hal_subregister_write(SR_AES_CNTRL_MODE, 0); /* AES_MODE=0 -> ECB for 1:st block*/
hal_subregister_write(SR_AES_CNTRL_DIR, 0); /* AES_DIR=0 -> encryption */
rf230_aes_write_state(plain); /* write string to encrypt into buffer */
res = crypt();
if(!res)
goto out;
rf230_aes_read_state(cipher); /* Read and return cipher */
out:
SREG = sreg;
return res;
}
int
rf230_aes_decrypt_ebc(unsigned char *key, unsigned char *cipher, unsigned char *plain)
{
int res;
uint8_t sreg;
/*
Dummy encryption of 0 w. original key
to get last round key to be used decrytion
*/
sreg = SREG;
cli();
rf230_aes_write_key(key);
hal_subregister_write(SR_AES_CNTRL_MODE, 0); /* AES_MODE=0 -> ECB for 1:st block*/
hal_subregister_write(SR_AES_CNTRL_DIR, 0); /* AES_DIR=0 -> encryption */
memset(tmp, 0, sizeof(tmp)); /* Setup for last round */
rf230_aes_write_state(tmp);
res = crypt();
if(!res)
goto out;
rf230_aes_read_key(tmp);/* Save the last round key */
/* And use as decrytion key */
rf230_aes_write_key(tmp);
hal_subregister_write(SR_AES_CNTRL_MODE, 0); /* AES_MODE=0 -> ECB for 1:st block*/
hal_subregister_write(SR_AES_CNTRL_DIR, 1); /* AES_DIR=1 -> decryption */
/* Write string to decrypt into buffer */
rf230_aes_write_state(cipher);
res = crypt();
if(!res)
goto out;
rf230_aes_read_state(plain); /* Read plaintext into string */
out:
SREG = sreg;
return res;
}
#endif /* AES_128_HW_CONF */

4
cpu/avr/radio/rf230bb/rf230bb.h
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@ -227,6 +227,10 @@ static bool rf230_is_sleeping(void);
extern uint8_t rf230_last_correlation,rf230_last_rssi,rf230_smallest_rssi;
uint8_t rf230_get_raw_rssi(void);
int rf230_aes_encrypt_ebc(unsigned char *key, unsigned char *plain, unsigned char *cipher);
int rf230_aes_decrypt_ebc(unsigned char *key, unsigned char *cipher, unsigned char *plain);
int rf230_aes_decrypt_ebc(unsigned char *key, unsigned char *cipher, unsigned char *plain);
#define rf230_rssi rf230_get_raw_rssi

107
examples/avr-rss2/AES128HW_test/AES128HW_test.c Normal file
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@ -0,0 +1,107 @@
/*
* Copyright (c) 2017, Robert Olsson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
* Author : Robert Olsson
* roolss@kth.se & robert@radio-sensors.com
* Created : 2017-04-22
*/
/**
* \file
* A simple AES128 crypto emmgine test for Atmel radios
*/
#include "contiki.h"
#include "dev/radio.h"
#include "net/netstack.h"
#include "sys/etimer.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "rf230bb.h"
PROCESS(aes_crypto_process, "AES HW crypto process");
AUTOSTART_PROCESSES(&aes_crypto_process);
unsigned char aes_key[16] = "abcdefghijklmnop";
unsigned char aes_p[128];
unsigned char aes_c[128];
unsigned char aes_s[128];
unsigned char tmp[16];
uint8_t i;
int res;
PROCESS_THREAD(aes_crypto_process, ev, data)
{
PROCESS_BEGIN();
/* AES engine on */
NETSTACK_RADIO.on();
strcpy((char *)aes_s, "Teststring______");
for(i = 0; i < 16; i++) {
printf("%02X", aes_s[i]);
}
printf(" Uncrypted \n");
res = rf230_aes_encrypt_ebc(aes_key, aes_s, aes_c);
if(!res) {
printf("ERR encryption\n");
exit(0);
}
for(i = 0; i < 16; i++) {
printf("%02X", aes_c[i]);
}
printf(" AES-128 EBC Crypted\n");
res = rf230_aes_decrypt_ebc(aes_key, aes_c, aes_p);
if(!res) {
printf("ERR decryption\n");
exit(0);
}
for(i = 0; i < 16; i++) {
printf("%02X", aes_p[i]);
}
printf(" Decrypted \n");
res = rf230_aes_encrypt_cbc(aes_key, aes_s, sizeof(aes_s), aes_c);
if(!res) {
printf("ERR encryption\n");
exit(0);
}
for(i = 0; i < 16; i++) {
printf("%02X", aes_c[i]);
}
printf(" AES-128 MIC\n");
PROCESS_END();
}

18
examples/avr-rss2/AES128HW_test/Makefile Normal file
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@ -0,0 +1,18 @@
CFLAGS += -DPROJECT_CONF_H=\"project-conf.h\"
CONTIKI_PROJECT = AES128HW_test
all: $(CONTIKI_PROJECT)
# We use floating vars. Add library.
PRINTF_LIB_FLT = -Wl,-u,vfprintf -lprintf_flt -lm
PRINTF_LIB_MIN = -Wl,-u,vfprintf -lprintf_min
PRINTF_LIB = $(PRINTF_LIB_FLT)
CLIBS = $(PRINTF_LIB)
CUSTOM_RULE_LINK = 1
%.$(TARGET): %.co $(PROJECT_OBJECTFILES) $(PROJECT_LIBRARIES) contiki-$(TARGET).a
$(LD) $(LDFLAGS) $(TARGET_STARTFILES) ${filter-out %.a,$^} ${filter %.a,$^} $(TARGET_LIBFILES) -o $@ $(CLIBS)
CONTIKI_WITH_RIME = 1
CONTIKI = ../../..
include $(CONTIKI)/Makefile.include

24
examples/avr-rss2/AES128HW_test/README.md Normal file
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@ -0,0 +1,24 @@
AES128HW_test
=============
Scope
-----
Simple demo to use the AES crypto engine in the Atmel radios.
Build
-----
make TARGET=avr-rss2
Program output
--------------
*******Booting Contiki-3.x-3252-g0783591*******
I2C: AT24MAC
MAC address 7d:c2:
PAN=0xABCD, MAC=nullmac, RDC=nullrdc, NETWORK=Rime, channel=26, check-rate-Hz=128, tx-power=0
Routing Enabled
54657374737472696E675F5F5F5F5F5F Uncrypted
6FDE14E8F9453C6714B7B45B24876CBF AES-128 EBC Crypted
54657374737472696E675F5F5F5F5F5F Decrypted
215C9836DCDB443F15AFED576E9F7F72 AES-128 MIC

47
examples/avr-rss2/AES128HW_test/project-conf.h Normal file
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@ -0,0 +1,47 @@
/*
* Copyright (c) 2015, Copyright Robert Olsson / Radio Sensors AB
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*
* Author : Robert Olsson robert@radio-sensors.com
* Created : 2017-04-22
*/
/**
* \file
* Project specific configuration defines for example
*
*/
#ifndef PROJECT_CONF_H_
#define PROJECT_CONF_H_
#define AES_128_HW_CONF 1
#endif /* PROJECT_CONF_H_ */