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support ASM encryption module

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This commit is contained in:
Mariano Alvira 2011-02-27 17:37:37 -05:00
parent 5012757673
commit 4d6562a0bc
6 changed files with 333 additions and 1 deletions
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116
lib/include/asm.h Normal file
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@ -0,0 +1,116 @@
/*
* Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
* to the MC1322x project (http://mc1322x.devl.org)
* 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 libmc1322x: see http://mc1322x.devl.org
* for details.
*
*
*/
#ifndef ASM_H
#define ASM_H
/* Structure-based register definitions */
/* Example use:
ASM->KEY0 = 0xaabbccdd;
ASM->CONTROL1bits = (struct ASM_CONTROL1) {
.MASK_IRQ = 1,
.CBC = 1,
};
ASM->CONTROL1bits.SELF_TEST = 1;
*/
struct ASM_struct {
uint32_t KEY0;
uint32_t KEY1;
uint32_t KEY2;
uint32_t KEY3;
uint32_t DATA0;
uint32_t DATA1;
uint32_t DATA2;
uint32_t DATA3;
uint32_t CTR0;
uint32_t CTR1;
uint32_t CTR2;
uint32_t CTR3;
uint32_t CTR0_RESULT;
uint32_t CTR1_RESULT;
uint32_t CTR2_RESULT;
uint32_t CTR3_RESULT;
uint32_t CBC0_RESULT;
uint32_t CBC1_RESULT;
uint32_t CBC2_RESULT;
uint32_t CBC3_RESULT;
union {
uint32_t CONTROL0;
struct ASM_CONTROL0 {
uint32_t :24;
uint32_t START:1;
uint32_t CLEAR:1;
uint32_t LOAD_MAC:1;
uint32_t :4;
uint32_t CLEAR_IRQ:1;
} CONTROL0bits;
};
union {
uint32_t CONTROL1;
struct ASM_CONTROL1 {
uint32_t ON:1;
uint32_t NORMAL_MODE:1;
uint32_t BYPASS:1;
uint32_t :21;
uint32_t CBC:1;
uint32_t CTR:1;
uint32_t SELF_TEST:1;
uint32_t :4;
uint32_t MASK_IRQ:1;
} CONTROL1bits;
};
union {
uint32_t STATUS;
struct ASM_STATUS {
uint32_t :24;
uint32_t DONE:1;
uint32_t TEST_PASS:1;
uint32_t :6;
} STATUSbits;
};
uint32_t reserved;
uint32_t MAC0;
uint32_t MAC1;
uint32_t MAC2;
uint32_t MAC3;
};
static volatile struct ASM_struct * const ASM = (void *) (0x80008000);
#endif

2
lib/include/isr.h
View file

@ -166,5 +166,7 @@ extern void uart1_isr(void) __attribute__((weak));
extern void maca_isr(void) __attribute__((weak));
extern void asm_isr(void) __attribute__((weak));
#endif

1
lib/include/mc1322x.h
View file

@ -46,5 +46,6 @@
#include "packet.h"
#include "uart1.h"
#include "utils.h"
#include "asm.h"
#endif

3
src/isr.c
View file

@ -86,6 +86,9 @@ void irq(void)
cal_isr();
}
}
if(bit_is_set(pending, INT_NUM_ASM)) {
if(asm_isr != 0) { asm_isr(); }
}
*INTFRC = 0; /* stop forcing interrupts */

3
tests/Makefile
View file

@ -10,7 +10,8 @@ TARGETS := blink-red blink-green blink-blue blink-white blink-allio \
uart1-loopback \
tmr tmr-ints \
sleep \
printf
printf \
asm
# these targets are built with space reserved for variables needed by ROM services
# this space is initialized with a rom call to rom_data_init

209
tests/asm.c Normal file
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@ -0,0 +1,209 @@
/*
* Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
* to the MC1322x project (http://mc1322x.devl.org)
* 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 libmc1322x: see http://mc1322x.devl.org
* for details.
*
*
*/
#include <mc1322x.h>
#include <board.h>
#include <stdio.h>
#include "tests.h"
#include "config.h"
void asm_isr(void) {
printf("asm isr\n\r");
ASM->CONTROL0bits.CLEAR_IRQ = 1;
}
void main(void) {
volatile int i;
/* trim the reference osc. to 24MHz */
trim_xtal();
uart_init(INC, MOD, SAMP);
vreg_init();
enable_irq(ASM);
print_welcome("asm");
printf("ASM Control 0: %08x\n\r", (unsigned int)ASM->CONTROL0);
printf("ASM Control 1: %08x\n\r", (unsigned int)ASM->CONTROL1);
printf("ASM Status: %08x\n\r", (unsigned int)ASM->STATUS);
printf("ASM Test pass: %d\n\r", ASM->STATUSbits.TEST_PASS);
/* ASM module is disabled until self-test passes */
printf("\n\r*** ASM self-test ***\n\r");
ASM->CONTROL1bits.ON = 1;
ASM->CONTROL1bits.SELF_TEST = 1;
ASM->CONTROL0bits.START = 1;
/* Self test takes 3330 periph. clocks (default 24Mhz) */
/* to complete. This doesn't wait 3330 exactly, but should be long enough */
for(i = 0; i < 3330; i++) { continue; }
printf("ASM Test pass: %d\n\r", ASM->STATUSbits.TEST_PASS);
/* must clear the self test bit when done */
ASM->CONTROL1bits.SELF_TEST = 0;
/* ASM starts in "BOOT" mode which uses an internal secret key
* to load encrypted data from an external source */
/* must set to NORMAL mode */
ASM->CONTROL1bits.NORMAL_MODE = 1;
/* setting the bypass bit will disable the encryption */
/* bypass defaults to off */
ASM->CONTROL1bits.BYPASS = 0;
printf("\n\r*** set ASM key ***\n\r");
ASM->KEY0 = 0xccddeeff;
ASM->KEY1 = 0x8899aabb;
ASM->KEY2 = 0x44556677;
ASM->KEY3 = 0x00112233;
/* KEY registers appear to be write-only (which is a good thing) */
/* even though the datasheet says you can read them */
printf("ASM Key [3,2,1,0] : 0x%08x%08x%08x%08x\n",
(unsigned int) ASM->KEY3,
(unsigned int) ASM->KEY2,
(unsigned int) ASM->KEY1,
(unsigned int) ASM->KEY0);
printf("\n\r*** CTR test ***\n\r");
printf("Encrypt\n\r");
ASM->CONTROL1bits.CTR = 1;
ASM->DATA0 = 0xdeaddead;
ASM->DATA1 = 0xbeefbeef;
ASM->DATA2 = 0xfaceface;
ASM->DATA3 = 0x01234567;
printf("ASM Data [3,2,1,0] : 0x%08x%08x%08x%08x\n",
(unsigned int) ASM->DATA3,
(unsigned int) ASM->DATA2,
(unsigned int) ASM->DATA1,
(unsigned int) ASM->DATA0);
ASM->CTR0 = 0x33333333;
ASM->CTR1 = 0x22222222;
ASM->CTR2 = 0x11111111;
ASM->CTR3 = 0x00000000;
printf("ASM CTR [3,2,1,0] : 0x%08x%08x%08x%08x\n",
(unsigned int) ASM->CTR3,
(unsigned int) ASM->CTR2,
(unsigned int) ASM->CTR1,
(unsigned int) ASM->CTR0);
ASM->CONTROL0bits.START = 1;
while(ASM->STATUSbits.DONE == 0) { continue; }
printf("ASM CTR RESULT [3,2,1,0]: 0x%08x%08x%08x%08x\n",
(unsigned int) ASM->CTR3_RESULT,
(unsigned int) ASM->CTR2_RESULT,
(unsigned int) ASM->CTR1_RESULT,
(unsigned int) ASM->CTR0_RESULT);
printf("Decrypt\n\r");
ASM->DATA0 = ASM->CTR0_RESULT;
ASM->DATA1 = ASM->CTR1_RESULT;
ASM->DATA2 = ASM->CTR2_RESULT;
ASM->DATA3 = ASM->CTR3_RESULT;
ASM->CONTROL0bits.START = 1;
while(ASM->STATUSbits.DONE == 0) { continue; }
printf("ASM CTR RESULT [3,2,1,0]: 0x%08x%08x%08x%08x\n",
(unsigned int) ASM->CTR3_RESULT,
(unsigned int) ASM->CTR2_RESULT,
(unsigned int) ASM->CTR1_RESULT,
(unsigned int) ASM->CTR0_RESULT);
printf("\n\r*** CBC MAC generation ***\n\r");
ASM->CONTROL1bits.CTR = 0;
ASM->CONTROL1bits.CBC = 1;
/* CBC is like a hash */
/* it doesn't use the CTR data */
/* the accumulated MAC is in the MAC registers */
/* you must use the CLEAR bit to reset the MAC state */
ASM->DATA0 = 0xdeaddead;
ASM->DATA1 = 0xbeefbeef;
ASM->DATA2 = 0xfaceface;
ASM->DATA3 = 0x01234567;
ASM->CONTROL0bits.CLEAR = 1;
ASM->CONTROL0bits.START = 1;
while(ASM->STATUSbits.DONE == 0) { continue; }
printf("ASM CBC RESULT [3,2,1,0]: 0x%08x%08x%08x%08x\n",
(unsigned int) ASM->CBC3_RESULT,
(unsigned int) ASM->CBC2_RESULT,
(unsigned int) ASM->CBC1_RESULT,
(unsigned int) ASM->CBC0_RESULT);
printf("\n\r*** CCM (CTR+CBC) ***\n\r");
ASM->CONTROL1bits.CTR = 1;
ASM->CONTROL1bits.CBC = 1;
ASM->CONTROL0bits.CLEAR = 1;
ASM->CONTROL0bits.START = 1;
while(ASM->STATUSbits.DONE == 0) { continue; }
printf("ASM CTR RESULT [3,2,1,0]: 0x%08x%08x%08x%08x\n",
(unsigned int) ASM->CTR3_RESULT,
(unsigned int) ASM->CTR2_RESULT,
(unsigned int) ASM->CTR1_RESULT,
(unsigned int) ASM->CTR0_RESULT);
printf("ASM CBC RESULT [3,2,1,0]: 0x%08x%08x%08x%08x\n",
(unsigned int) ASM->CBC3_RESULT,
(unsigned int) ASM->CBC2_RESULT,
(unsigned int) ASM->CBC1_RESULT,
(unsigned int) ASM->CBC0_RESULT);
while(1) {
}
}