--- /dev/null
+/* p192.c */
+/*
+ This file is part of the AVR-Crypto-Lib.
+ Copyright (C) 2006-2012 Daniel Otte (daniel.otte@rub.de)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <inttypes.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "bigint.h"
+
+/*
+ * p = 6277101735386680763835789423207666416083908700390324961279
+ * = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFF
+ */
+
+static
+uint8_t nist_curve_p192_p_w[] = {
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
+};
+
+bigint_t nist_curve_p192_p = {
+ .length_W = 192 / BIGINT_WORD_SIZE,
+ .wordv = nist_curve_p192_p_w,
+ .info = 7
+};
+
+/*
+ * A = ( A5 || A4 || A3 || A2 || A1 || A0 ) ; An if 64-bit
+ * A mod p = B = T + S1 + S2 + S3 mod p
+ *
+ * T = ( A2 || A1 || A0 )
+ * S1 = ( A3 || A3 )
+ * S2 = ( A4 || A4 || 0 )
+ * S3 = ( A5 || A5 || A5 )
+ *
+ */
+
+int bigint_reduce_p192(bigint_t *a){
+
+ bigint_word_t s_w[3 * 64 / BIGINT_WORD_SIZE];
+ bigint_t s;
+ uint16_t o_length;
+
+ o_length = a->length_W;
+
+ if(o_length < 192 / BIGINT_WORD_SIZE){
+ return 0;
+ }
+
+ if(o_length > 192 * 2 / BIGINT_WORD_SIZE){
+ bigint_reduce(a, &nist_curve_p192_p);
+ }
+
+ if(o_length > 192 / BIGINT_WORD_SIZE){
+ s.wordv = s_w;
+ s.length_W = 2 * 64 / BIGINT_WORD_SIZE;
+
+ /*
+ * copy A3 twice in s
+ */
+ if(o_length >= 4 * 64 / BIGINT_WORD_SIZE){
+ memcpy(s.wordv, a->wordv + 3 * 64 / BIGINT_WORD_SIZE, 64 / 8);
+ }else{
+ memset(s.wordv, 0, 8);
+ memcpy(s.wordv, a->wordv + 3 * 64 / BIGINT_WORD_SIZE,
+ o_length * BIGINT_WORD_SIZE / 8 - 3 * 64 / 8);
+ }
+
+ memcpy(s.wordv + 64 / BIGINT_WORD_SIZE, s.wordv, 64 / 8);
+ bigint_adjust(&s);
+
+ /*
+ * Set A3 to zero so we can use a as T
+ */
+ memset(a->wordv + 3 * 64 / BIGINT_WORD_SIZE, 0, BIGINT_WORD_SIZE / 8);
+ a->length_W = 3 * 64 / BIGINT_WORD_SIZE;
+ bigint_adjust(a);
+
+ /*
+ * Add s (alias S1) to a (alias T)
+ */
+ bigint_add_u(a, a, &s);
+
+
+ if(o_length > 4 * 64 / BIGINT_WORD_SIZE){
+ /*
+ * copy A4 twice in s
+ */
+ if(o_length >= 5 * 64 / BIGINT_WORD_SIZE){
+ memcpy(s.wordv, a->wordv + 4 * 64 / BIGINT_WORD_SIZE, 64 / 8);
+ }else{
+ memset(s.wordv, 0, 8);
+ memcpy(s.wordv, a->wordv + 4 * 64 / BIGINT_WORD_SIZE,
+ o_length * BIGINT_WORD_SIZE / 8 - 4 * 64 / 8);
+ }
+ memcpy(s.wordv + 64 / BIGINT_WORD_SIZE, s.wordv, 64 / 8);
+ bigint_adjust(&s);
+
+ /*
+ * Add s (alias S2) to a (alias T + S1)
+ */
+ bigint_add_scale_u(a, &s, 8);
+
+
+ if(o_length > 5 * 64 / BIGINT_WORD_SIZE){
+ /*
+ * copy A5 three times in s
+ */
+ if(o_length == 6 * 64 / BIGINT_WORD_SIZE){
+ memcpy(s.wordv, a->wordv + 5 * 64 / BIGINT_WORD_SIZE, 64 / 8);
+ } else {
+ memset(s.wordv, 0, 8);
+ memcpy(s.wordv, a->wordv + 5 * 64 / BIGINT_WORD_SIZE,
+ o_length * BIGINT_WORD_SIZE / 8 - 5 * 64 / 8);
+ }
+ memcpy(s.wordv + 64 / BIGINT_WORD_SIZE, s.wordv, 64 / 8);
+ memcpy(s.wordv + 2 * 64 / BIGINT_WORD_SIZE, s.wordv, 64 / 8);
+ s.length_W = 3 * 64 / BIGINT_WORD_SIZE;
+ bigint_adjust(&s);
+
+ /*
+ * Add s (alias S2) to a (alias T + S1)
+ */
+ bigint_add_u(a, a, &s);
+ }
+ }
+
+ }
+ while(bigint_cmp_u(a, &nist_curve_p192_p) >= 0){
+ bigint_sub_u(a, a, &nist_curve_p192_p);
+ }
+
+ return 0;
+}
+
--- /dev/null
+/* nist_p192.h */
+/*
+ This file is part of the AVR-Crypto-Lib.
+ Copyright (C) 2012 Daniel Otte (daniel.otte@rub.de)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef NIST_P192_H_
+#define NIST_P192_H_
+
+#include "bigint.h"
+
+extern bigint_t nist_curve_p192_p;
+int bigint_reduce_p192(bigint_t *a);
+
+#endif /* NIST_P192_H_ */
--- /dev/null
+# Makefile for ECDSA
+ALGO_NAME := ECDSA
+
+# comment out the following line for removement of ECDSA from the build process
+SIGNATURE += $(ALGO_NAME)
+
+$(ALGO_NAME)_DIR := ecdsa/
+$(ALGO_NAME)_INCDIR := memxor/ bigint/ sha1/ noekeon/ base64/ hfal/
+$(ALGO_NAME)_OBJ := bigint.o bigint_io.o sha1-asm.o nist_p192.o base64_enc.o
+$(ALGO_NAME)_TESTBIN := main-ecdsa-test.o $(CLI_STD) hfal_sha1.o $(HFAL_STD) \
+ noekeon_asm.o noekeon_prng.o memxor.o
+
+$(ALGO_NAME)_PERFORMANCE_TEST := performance
+
--- /dev/null
+/* main-dsa-test.c */
+/*
+ This file is part of the AVR-Crypto-Lib.
+ Copyright (C) 2010 Daniel Otte (daniel.otte@rub.de)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+/*
+ * ECDSA test-suit
+ *
+*/
+
+#include "main-test-common.h"
+
+#include "noekeon.h"
+#include "noekeon_prng.h"
+#include "bigint.h"
+#include "bigint_io.h"
+#include "nist_p192.h"
+
+#include "performance_test.h"
+#include "hfal_sha1.h"
+#include "base64_enc.h"
+#include "base64_dec.h"
+
+char* algo_name = "ECDSA";
+
+/*****************************************************************************
+ * additional validation-functions *
+ *****************************************************************************/
+
+void testrun_performance_bigint(void){
+ printf_P(PSTR("\n=== performance measurement ===\n"));
+ unsigned i, j;
+ bigint_t a,b,v;
+ bigint_word_t v_w[192 * 2 / BIGINT_WORD_SIZE];
+ bigint_word_t a_w[192 * 2 / BIGINT_WORD_SIZE];
+ bigint_word_t b_w[192 * 2 / BIGINT_WORD_SIZE];
+ uint32_t time_a, time_b;
+ int32_t time_diff;
+ int16_t faster_percent;
+ v.wordv = v_w;
+ for(j = 0; j < 32; ++j){
+ do{
+ for(i = 0; i < 192 * 2 / BIGINT_WORD_SIZE; ++i){
+ ((uint8_t*)v_w)[i] = random();
+ }
+ v.length_W = 192 * 2 / BIGINT_WORD_SIZE;
+ v.info = 0;
+ bigint_adjust(&v);
+ }while(0);
+
+ // printf_P(PSTR("candidate:\n"));
+ // bigint_print_hex(&v);
+ a.wordv = a_w;
+ b.wordv = b_w;
+ calibrateTimer();
+
+ // printf_P(PSTR("\n going to test optimized version: ...\n"));
+ uart0_flush();
+ time_a = 0;
+ for(i = 0; i < 16; ++i){
+ bigint_copy(&a, &v);
+ startTimer(1);
+ START_TIMER;
+ bigint_reduce_p192(&a);
+ STOP_TIMER;
+ time_a += stopTimer();
+ }
+ // printf_P(PSTR(" took: %"PRIu32" cycles\nresult:"), time);
+ // bigint_print_hex(&a);
+
+
+ // printf_P(PSTR("\n going to test not-optimized version: ...\n"));
+ // uart0_flush();
+ time_b = 0;
+ for(i = 0; i < 16; ++i){
+ bigint_copy(&b, &v);
+ startTimer(1);
+ START_TIMER;
+ bigint_reduce(&b, &nist_curve_p192_p);
+ STOP_TIMER;
+ time_b += stopTimer();
+ }
+ // printf_P(PSTR(" took: %"PRIu32" cycles\nresult:"), time);
+ // bigint_print_hex(&b);
+
+ time_diff = time_b - time_a;
+ faster_percent = (time_diff * 100) / time_b;
+
+ printf_P(PSTR(" delta: %7"PRId32" (%3"PRId16"%%) :-"), time_diff, faster_percent);
+ if(bigint_cmp_u(&a, &b)){
+ printf_P(PSTR("(\n"));
+ } else {
+ printf_P(PSTR(")\n"));
+ }
+ uart0_flush();
+ }
+}
+
+/*****************************************************************************
+ * main *
+ *****************************************************************************/
+
+const char echo_test_str[] PROGMEM = "echo-test";
+const char reset_prng_str[] PROGMEM = "reset-prng";
+const char quick_test_str[] PROGMEM = "quick-test";
+const char performance_str[] PROGMEM = "performance";
+const char echo_str[] PROGMEM = "echo";
+
+const const cmdlist_entry_t cmdlist[] PROGMEM = {
+// { reset_prng_str, NULL, reset_prng },
+// { quick_test_str, NULL, quick_test },
+ { performance_str, NULL, testrun_performance_bigint },
+ { echo_str, (void*)1, (void_fpt)echo_ctrl },
+ { NULL, NULL, NULL }
+};
+
+int main (void){
+ int8_t r;
+ main_setup();
+
+ for(;;){
+ welcome_msg(algo_name);
+ r = cmd_interface(cmdlist);
+ printf("r = %"PRId8"\n", r);
+ cli_putstr_P(PSTR("\r\nHello!\r\n"));
+ }
+}