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48a3a02238
Previously, constructing a `UnsignedBigInteger::from_base()` could produce an incorrect result if the input string contained a valid Base36 digit that was out of range of the given base. The same method would also crash if the input string contained an invalid Base36 digit. An error is now returned in both these cases. Constructing a BigFraction from string is now also fallible, so that we can handle the case where we are given an input string with invalid digits.
1042 lines
44 KiB
C++
1042 lines
44 KiB
C++
/*
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* Copyright (c) 2021, Peter Bocan <me@pbocan.net>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibCrypto/BigInt/Algorithms/UnsignedBigIntegerAlgorithms.h>
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#include <LibCrypto/BigInt/SignedBigInteger.h>
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#include <LibCrypto/BigInt/UnsignedBigInteger.h>
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#include <LibCrypto/NumberTheory/ModularFunctions.h>
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#include <LibTest/TestCase.h>
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#include <math.h>
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static Crypto::UnsignedBigInteger bigint_fibonacci(size_t n)
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{
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Crypto::UnsignedBigInteger num1(0);
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Crypto::UnsignedBigInteger num2(1);
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for (size_t i = 0; i < n; ++i) {
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Crypto::UnsignedBigInteger t = num1.plus(num2);
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num2 = num1;
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num1 = t;
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}
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return num1;
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}
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static Crypto::SignedBigInteger bigint_signed_fibonacci(size_t n)
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{
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Crypto::SignedBigInteger num1(0);
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Crypto::SignedBigInteger num2(1);
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for (size_t i = 0; i < n; ++i) {
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Crypto::SignedBigInteger t = num1.plus(num2);
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num2 = num1;
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num1 = t;
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}
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return num1;
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}
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TEST_CASE(test_bigint_fib500)
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{
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Vector<u32> result {
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315178285, 505575602, 1883328078, 125027121, 3649625763,
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347570207, 74535262, 3832543808, 2472133297, 1600064941, 65273441
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};
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EXPECT_EQ(bigint_fibonacci(500).words(), result);
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}
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TEST_CASE(test_unsigned_bigint_addition_initialization)
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{
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Crypto::UnsignedBigInteger num1;
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Crypto::UnsignedBigInteger num2(70);
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Crypto::UnsignedBigInteger num3 = num1.plus(num2);
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bool pass = (num3 == num2);
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pass &= (num1 == Crypto::UnsignedBigInteger(0));
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EXPECT(pass);
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}
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TEST_CASE(test_unsigned_bigint_addition_borrow_with_zero)
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{
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Crypto::UnsignedBigInteger num1({ UINT32_MAX - 3, UINT32_MAX });
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Crypto::UnsignedBigInteger num2({ UINT32_MAX - 2, 0 });
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Vector<u32> expected_result { 4294967289, 0, 1 };
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EXPECT_EQ(num1.plus(num2).words(), expected_result);
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}
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TEST_CASE(test_unsigned_bigint_basic_add_to_accumulator)
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{
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Crypto::UnsignedBigInteger num1(10);
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Crypto::UnsignedBigInteger num2(70);
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Crypto::UnsignedBigIntegerAlgorithms::add_into_accumulator_without_allocation(num1, num2);
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EXPECT_EQ(num1.words(), Vector<u32> { 80 });
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}
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TEST_CASE(test_unsigned_bigint_basic_add_to_empty_accumulator)
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{
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Crypto::UnsignedBigInteger num1 {};
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Crypto::UnsignedBigInteger num2(10);
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Crypto::UnsignedBigIntegerAlgorithms::add_into_accumulator_without_allocation(num1, num2);
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EXPECT_EQ(num1.words(), Vector<u32> { 10 });
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}
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TEST_CASE(test_unsigned_bigint_basic_add_to_smaller_accumulator)
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{
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Crypto::UnsignedBigInteger num1(10);
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Crypto::UnsignedBigInteger num2({ 10, 10 });
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Crypto::UnsignedBigIntegerAlgorithms::add_into_accumulator_without_allocation(num1, num2);
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Vector<u32> expected_result { 20, 10 };
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EXPECT_EQ(num1.words(), expected_result);
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}
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TEST_CASE(test_unsigned_bigint_add_to_accumulator_with_multiple_carry_levels)
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{
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Crypto::UnsignedBigInteger num1({ UINT32_MAX - 2, UINT32_MAX });
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Crypto::UnsignedBigInteger num2(5);
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Crypto::UnsignedBigIntegerAlgorithms::add_into_accumulator_without_allocation(num1, num2);
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Vector<u32> expected_result { 2, 0, 1 };
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EXPECT_EQ(num1.words(), expected_result);
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}
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TEST_CASE(test_unsigned_bigint_add_to_accumulator_with_leading_zero)
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{
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Crypto::UnsignedBigInteger num1(1);
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Crypto::UnsignedBigInteger num2({ 1, 0 });
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Crypto::UnsignedBigIntegerAlgorithms::add_into_accumulator_without_allocation(num1, num2);
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EXPECT_EQ(num1.words(), Vector<u32> { 2 });
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}
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TEST_CASE(test_unsigned_bigint_add_to_accumulator_with_carry_and_leading_zero)
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{
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Crypto::UnsignedBigInteger num1({ UINT32_MAX, 0, 0, 0 });
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Crypto::UnsignedBigInteger num2({ 1, 0 });
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Crypto::UnsignedBigIntegerAlgorithms::add_into_accumulator_without_allocation(num1, num2);
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Vector<u32> expected_result { 0, 1, 0, 0 };
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EXPECT_EQ(num1.words(), expected_result);
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}
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TEST_CASE(test_unsigned_bigint_simple_subtraction)
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{
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Crypto::UnsignedBigInteger num1(80);
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Crypto::UnsignedBigInteger num2(70);
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EXPECT_EQ(num1.minus(num2), Crypto::UnsignedBigInteger(10));
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}
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TEST_CASE(test_unsigned_bigint_simple_subtraction_invalid)
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{
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Crypto::UnsignedBigInteger num1(50);
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Crypto::UnsignedBigInteger num2(70);
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EXPECT(num1.minus(num2).is_invalid());
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}
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TEST_CASE(test_unsigned_bigint_simple_subtraction_with_borrow)
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{
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Crypto::UnsignedBigInteger num1(UINT32_MAX);
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Crypto::UnsignedBigInteger num2(1);
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Crypto::UnsignedBigInteger num3 = num1.plus(num2);
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Crypto::UnsignedBigInteger result = num3.minus(num2);
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EXPECT_EQ(result, num1);
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}
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TEST_CASE(test_unsigned_bigint_subtraction_with_large_numbers)
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{
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Crypto::UnsignedBigInteger num1 = bigint_fibonacci(343);
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Crypto::UnsignedBigInteger num2 = bigint_fibonacci(218);
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Crypto::UnsignedBigInteger result = num1.minus(num2);
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Vector<u32> expected_result {
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811430588, 2958904896, 1130908877, 2830569969, 3243275482,
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3047460725, 774025231, 7990
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};
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EXPECT_EQ(result.plus(num2), num1);
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EXPECT_EQ(result.words(), expected_result);
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}
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TEST_CASE(test_unsigned_bigint_subtraction_with_large_numbers2)
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{
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Crypto::UnsignedBigInteger num1(Vector<u32> { 1483061863, 446680044, 1123294122, 191895498, 3347106536, 16, 0, 0, 0 });
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Crypto::UnsignedBigInteger num2(Vector<u32> { 4196414175, 1117247942, 1123294122, 191895498, 3347106536, 16 });
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Crypto::UnsignedBigInteger result = num1.minus(num2);
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// this test only verifies that we don't crash on an assertion
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}
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TEST_CASE(test_unsigned_bigint_subtraction_regression_1)
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{
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auto num = Crypto::UnsignedBigInteger { 1 }.shift_left(256);
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Vector<u32> expected_result {
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4294967295, 4294967295, 4294967295, 4294967295, 4294967295,
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4294967295, 4294967295, 4294967295, 0
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};
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EXPECT_EQ(num.minus(1).words(), expected_result);
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}
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TEST_CASE(test_unsigned_bigint_simple_multiplication)
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{
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Crypto::UnsignedBigInteger num1(8);
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Crypto::UnsignedBigInteger num2(251);
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Crypto::UnsignedBigInteger result = num1.multiplied_by(num2);
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EXPECT_EQ(result.words(), Vector<u32> { 2008 });
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}
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TEST_CASE(test_unsigned_bigint_multiplication_with_big_numbers1)
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{
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Crypto::UnsignedBigInteger num1 = bigint_fibonacci(200);
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Crypto::UnsignedBigInteger num2(12345678);
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Crypto::UnsignedBigInteger result = num1.multiplied_by(num2);
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Vector<u32> expected_result { 669961318, 143970113, 4028714974, 3164551305, 1589380278, 2 };
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EXPECT_EQ(result.words(), expected_result);
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}
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TEST_CASE(test_unsigned_bigint_multiplication_with_big_numbers2)
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{
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Crypto::UnsignedBigInteger num1 = bigint_fibonacci(200);
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Crypto::UnsignedBigInteger num2 = bigint_fibonacci(341);
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Crypto::UnsignedBigInteger result = num1.multiplied_by(num2);
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Vector<u32> expected_result {
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3017415433, 2741793511, 1957755698, 3731653885, 3154681877,
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785762127, 3200178098, 4260616581, 529754471, 3632684436,
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1073347813, 2516430
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};
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EXPECT_EQ(result.words(), expected_result);
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}
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TEST_CASE(test_unsigned_bigint_simple_division)
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{
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Crypto::UnsignedBigInteger num1(27194);
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Crypto::UnsignedBigInteger num2(251);
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auto result = num1.divided_by(num2);
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Crypto::UnsignedDivisionResult expected = { Crypto::UnsignedBigInteger(108), Crypto::UnsignedBigInteger(86) };
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EXPECT_EQ(result.quotient, expected.quotient);
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EXPECT_EQ(result.remainder, expected.remainder);
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}
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TEST_CASE(test_unsigned_bigint_division_with_big_numbers)
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{
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Crypto::UnsignedBigInteger num1 = bigint_fibonacci(386);
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Crypto::UnsignedBigInteger num2 = bigint_fibonacci(238);
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auto result = num1.divided_by(num2);
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Crypto::UnsignedDivisionResult expected = {
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Crypto::UnsignedBigInteger(Vector<u32> { 2300984486, 2637503534, 2022805584, 107 }),
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Crypto::UnsignedBigInteger(Vector<u32> { 1483061863, 446680044, 1123294122, 191895498, 3347106536, 16, 0, 0, 0 })
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};
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EXPECT_EQ(result.quotient, expected.quotient);
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EXPECT_EQ(result.remainder, expected.remainder);
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}
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TEST_CASE(test_unsigned_bigint_division_combined_test)
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{
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auto num1 = bigint_fibonacci(497);
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auto num2 = bigint_fibonacci(238);
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auto div_result = num1.divided_by(num2);
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EXPECT_EQ(div_result.quotient.multiplied_by(num2).plus(div_result.remainder), num1);
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}
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TEST_CASE(test_unsigned_bigint_base10_from_string)
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{
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auto result = TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(10, "57195071295721390579057195715793"sv));
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Vector<u32> expected_result { 3806301393, 954919431, 3879607298, 721 };
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EXPECT_EQ(result.words(), expected_result);
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Vector<StringView> invalid_base10_number_strings { "1A"sv, "1:"sv, "Z1"sv, "1/"sv };
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for (auto invalid_base10_number_string : invalid_base10_number_strings)
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EXPECT_EQ(Crypto::UnsignedBigInteger::from_base(10, invalid_base10_number_string).is_error(), true);
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}
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TEST_CASE(test_unsigned_bigint_base10_to_string)
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{
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auto bigint = Crypto::UnsignedBigInteger {
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Vector<u32> { 3806301393, 954919431, 3879607298, 721 }
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};
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auto result = MUST(bigint.to_base(10));
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EXPECT_EQ(result, "57195071295721390579057195715793");
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}
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TEST_CASE(test_bigint_modular_inverse)
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{
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auto result = Crypto::NumberTheory::ModularInverse(7, 87);
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EXPECT_EQ(result, 25);
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}
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TEST_CASE(test_bigint_even_simple_modular_power)
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{
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Crypto::UnsignedBigInteger base { 7 };
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Crypto::UnsignedBigInteger exponent { 2 };
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Crypto::UnsignedBigInteger modulo { 10 };
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auto result = Crypto::NumberTheory::ModularPower(base, exponent, modulo);
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EXPECT_EQ(result.words(), Vector<u32> { 9 });
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}
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TEST_CASE(test_bigint_odd_simple_modular_power)
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{
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Crypto::UnsignedBigInteger base { 10 };
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Crypto::UnsignedBigInteger exponent { 2 };
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Crypto::UnsignedBigInteger modulo { 9 };
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auto result = Crypto::NumberTheory::ModularPower(base, exponent, modulo);
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EXPECT_EQ(result.words(), Vector<u32> { 1 });
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}
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TEST_CASE(test_bigint_large_even_fibonacci_modular_power)
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{
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Crypto::UnsignedBigInteger base = bigint_fibonacci(200);
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Crypto::UnsignedBigInteger exponent = bigint_fibonacci(100);
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Crypto::UnsignedBigInteger modulo = bigint_fibonacci(150);
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// Result according to Wolfram Alpha : 7195284628716783672927396027925
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auto result = Crypto::NumberTheory::ModularPower(base, exponent, modulo);
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Vector<u32> expected_result { 2042093077, 1351416233, 3510104665, 90 };
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EXPECT_EQ(result.words(), expected_result);
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}
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TEST_CASE(test_bigint_large_odd_fibonacci_modular_power)
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{
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Crypto::UnsignedBigInteger base = bigint_fibonacci(200);
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Crypto::UnsignedBigInteger exponent = bigint_fibonacci(100);
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Crypto::UnsignedBigInteger modulo = bigint_fibonacci(149);
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// Result according to Wolfram Alpha : 1136278609611966596838389694992
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auto result = Crypto::NumberTheory::ModularPower(base, exponent, modulo);
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Vector<u32> expected_result { 2106049040, 2169509253, 1468244710, 14 };
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EXPECT_EQ(result.words(), expected_result);
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}
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TEST_CASE(test_bigint_large_odd_fibonacci_with_carry_modular_power)
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{
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Crypto::UnsignedBigInteger base = bigint_fibonacci(200);
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Crypto::UnsignedBigInteger exponent = bigint_fibonacci(100);
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Crypto::UnsignedBigInteger modulo = bigint_fibonacci(185);
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// Result according to Wolfram Alpha : 55094573983071006678665780782730672080
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auto result = Crypto::NumberTheory::ModularPower(base, exponent, modulo);
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Vector<u32> expected_result { 1988720592, 2097784252, 347129583, 695391288 };
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EXPECT_EQ(result.words(), expected_result);
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}
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TEST_CASE(test_bigint_modular_power_extra_tests)
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{
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struct {
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Crypto::UnsignedBigInteger base;
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Crypto::UnsignedBigInteger exp;
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Crypto::UnsignedBigInteger mod;
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Crypto::UnsignedBigInteger expected;
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} mod_pow_tests[] = {
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{ "2988348162058574136915891421498819466320163312926952423791023078876139"_bigint, "2351399303373464486466122544523690094744975233415544072992656881240319"_bigint, "10000"_bigint, "3059"_bigint },
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{ "24231"_bigint, "12448"_bigint, "14679"_bigint, "4428"_bigint },
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{ "1005404"_bigint, "8352654"_bigint, "8161408"_bigint, "2605696"_bigint },
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{ "3665005778"_bigint, "3244425589"_bigint, "565668506"_bigint, "524766494"_bigint },
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{ "10662083169959689657"_bigint, "11605678468317533000"_bigint, "1896834583057209739"_bigint, "1292743154593945858"_bigint },
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{ "99667739213529524852296932424683448520"_bigint, "123394910770101395416306279070921784207"_bigint, "238026722756504133786938677233768788719"_bigint, "197165477545023317459748215952393063201"_bigint },
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{ "49368547511968178788919424448914214709244872098814465088945281575062739912239"_bigint, "25201856190991298572337188495596990852134236115562183449699512394891190792064"_bigint, "45950460777961491021589776911422805972195170308651734432277141467904883064645"_bigint, "39917885806532796066922509794537889114718612292469285403012781055544152450051"_bigint },
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{ "48399385336454791246880286907257136254351739111892925951016159217090949616810"_bigint, "5758661760571644379364752528081901787573279669668889744323710906207949658569"_bigint, "32812120644405991429173950312949738783216437173380339653152625840449006970808"_bigint, "7948464125034399875323770213514649646309423451213282653637296324080400293584"_bigint },
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};
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for (auto test_case : mod_pow_tests) {
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auto actual = Crypto::NumberTheory::ModularPower(
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test_case.base, test_case.exp, test_case.mod);
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EXPECT_EQ(actual, test_case.expected);
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}
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}
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TEST_CASE(test_bigint_primality_test)
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{
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struct {
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Crypto::UnsignedBigInteger candidate;
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bool expected_result;
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} primality_tests[] = {
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{ "1180591620717411303424"_bigint, false }, // 2**70
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{ "620448401733239439360000"_bigint, false }, // 25!
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{ "953962166440690129601298432"_bigint, false }, // 12**25
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{ "620448401733239439360000"_bigint, false }, // 25!
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{ "147926426347074375"_bigint, false }, // 35! / 2**32
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{ "340282366920938429742726440690708343523"_bigint, false }, // 2 factors near 2^64
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{ "73"_bigint, true },
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{ "6967"_bigint, true },
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{ "787649"_bigint, true },
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{ "73513949"_bigint, true },
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{ "6691236901"_bigint, true },
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{ "741387182759"_bigint, true },
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{ "67466615915827"_bigint, true },
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{ "9554317039214687"_bigint, true },
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{ "533344522150170391"_bigint, true },
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{ "18446744073709551557"_bigint, true }, // just below 2**64
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};
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for (auto test_case : primality_tests) {
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bool actual_result = Crypto::NumberTheory::is_probably_prime(test_case.candidate);
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EXPECT_EQ(test_case.expected_result, actual_result);
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}
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}
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TEST_CASE(test_bigint_random_number_generation)
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{
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struct {
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Crypto::UnsignedBigInteger min;
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Crypto::UnsignedBigInteger max;
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} random_number_tests[] = {
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{ "1"_bigint, "1000000"_bigint },
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{ "10000000000"_bigint, "20000000000"_bigint },
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{ "1000"_bigint, "200000000000000000"_bigint },
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{ "200000000000000000"_bigint, "200000000000010000"_bigint },
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};
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for (auto test_case : random_number_tests) {
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auto actual_result = Crypto::NumberTheory::random_number(test_case.min, test_case.max);
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EXPECT(!(actual_result < test_case.min));
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EXPECT(actual_result < test_case.max);
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}
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}
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TEST_CASE(test_bigint_random_distribution)
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{
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auto actual_result = Crypto::NumberTheory::random_number(
|
|
"1"_bigint,
|
|
"100000000000000000000000000000"_bigint); // 10**29
|
|
if (actual_result < "100000000000000000000"_bigint) { // 10**20
|
|
FAIL("Too small");
|
|
outln("The generated number {} is extremely small. This *can* happen by pure chance, but should happen only once in a billion times. So it's probably an error.", MUST(actual_result.to_base(10)));
|
|
} else if ("99999999900000000000000000000"_bigint < actual_result) { // 10**29 - 10**20
|
|
FAIL("Too large");
|
|
outln("The generated number {} is extremely large. This *can* happen by pure chance, but should happen only once in a billion times. So it's probably an error.", MUST(actual_result.to_base(10)));
|
|
}
|
|
}
|
|
|
|
TEST_CASE(test_bigint_import_big_endian_decode_encode_roundtrip)
|
|
{
|
|
u8 random_bytes[128];
|
|
u8 target_buffer[128];
|
|
fill_with_random(random_bytes);
|
|
auto encoded = Crypto::UnsignedBigInteger::import_data(random_bytes, 128);
|
|
encoded.export_data({ target_buffer, 128 });
|
|
EXPECT(memcmp(target_buffer, random_bytes, 128) == 0);
|
|
}
|
|
|
|
TEST_CASE(test_bigint_import_big_endian_encode_decode_roundtrip)
|
|
{
|
|
u8 target_buffer[128];
|
|
auto encoded = "12345678901234567890"_bigint;
|
|
auto size = encoded.export_data({ target_buffer, 128 });
|
|
auto decoded = Crypto::UnsignedBigInteger::import_data(target_buffer, size);
|
|
EXPECT_EQ(encoded, decoded);
|
|
}
|
|
|
|
TEST_CASE(test_bigint_big_endian_import)
|
|
{
|
|
auto number = Crypto::UnsignedBigInteger::import_data("hello"sv);
|
|
EXPECT_EQ(number, "448378203247"_bigint);
|
|
}
|
|
|
|
TEST_CASE(test_bigint_big_endian_export)
|
|
{
|
|
auto number = "448378203247"_bigint;
|
|
char exported[8] { 0 };
|
|
auto exported_length = number.export_data({ exported, 8 }, true);
|
|
EXPECT_EQ(exported_length, 5u);
|
|
EXPECT(memcmp(exported + 3, "hello", 5) == 0);
|
|
}
|
|
|
|
TEST_CASE(test_bigint_one_based_index_of_highest_set_bit)
|
|
{
|
|
auto num1 = "1234567"_bigint;
|
|
auto num2 = "1234567"_bigint;
|
|
EXPECT_EQ("0"_bigint.one_based_index_of_highest_set_bit(), 0u);
|
|
EXPECT_EQ("1"_bigint.one_based_index_of_highest_set_bit(), 1u);
|
|
EXPECT_EQ("7"_bigint.one_based_index_of_highest_set_bit(), 3u);
|
|
EXPECT_EQ("4294967296"_bigint.one_based_index_of_highest_set_bit(), 33u);
|
|
}
|
|
|
|
TEST_CASE(test_signed_bigint_bitwise_not_fill_to_one_based_index)
|
|
{
|
|
EXPECT_EQ("0"_bigint.bitwise_not_fill_to_one_based_index(0), "0"_bigint);
|
|
EXPECT_EQ("0"_bigint.bitwise_not_fill_to_one_based_index(1), "1"_bigint);
|
|
EXPECT_EQ("0"_bigint.bitwise_not_fill_to_one_based_index(2), "3"_bigint);
|
|
EXPECT_EQ("0"_bigint.bitwise_not_fill_to_one_based_index(4), "15"_bigint);
|
|
EXPECT_EQ("0"_bigint.bitwise_not_fill_to_one_based_index(32), "4294967295"_bigint);
|
|
EXPECT_EQ("0"_bigint.bitwise_not_fill_to_one_based_index(33), "8589934591"_bigint);
|
|
}
|
|
|
|
TEST_CASE(test_bigint_bitwise_or)
|
|
{
|
|
auto num1 = "1234567"_bigint;
|
|
auto num2 = "1234567"_bigint;
|
|
EXPECT_EQ(num1.bitwise_or(num2), num1);
|
|
}
|
|
|
|
TEST_CASE(test_bigint_bitwise_or_different_lengths)
|
|
{
|
|
auto num1 = "1234567"_bigint;
|
|
auto num2 = "123456789012345678901234567890"_bigint;
|
|
auto expected = "123456789012345678901234622167"_bigint;
|
|
auto result = num1.bitwise_or(num2);
|
|
EXPECT_EQ(result, expected);
|
|
}
|
|
|
|
TEST_CASE(test_signed_bigint_bitwise_or)
|
|
{
|
|
auto num1 = "-1234567"_sbigint;
|
|
auto num2 = "1234567"_sbigint;
|
|
EXPECT_EQ(num1.bitwise_or(num1), num1);
|
|
EXPECT_EQ(num1.bitwise_or(num2), "-1"_sbigint);
|
|
EXPECT_EQ(num2.bitwise_or(num1), "-1"_sbigint);
|
|
EXPECT_EQ(num2.bitwise_or(num2), num2);
|
|
|
|
EXPECT_EQ("0"_sbigint.bitwise_or("-1"_sbigint), "-1"_sbigint);
|
|
}
|
|
|
|
TEST_CASE(test_bigint_bitwise_and)
|
|
{
|
|
auto num1 = "1234567"_bigint;
|
|
auto num2 = "1234561"_bigint;
|
|
EXPECT_EQ(num1.bitwise_and(num2), "1234561"_bigint);
|
|
}
|
|
|
|
TEST_CASE(test_bigint_bitwise_and_different_lengths)
|
|
{
|
|
auto num1 = "1234567"_bigint;
|
|
auto num2 = "123456789012345678901234567890"_bigint;
|
|
EXPECT_EQ(num1.bitwise_and(num2), "1180290"_bigint);
|
|
}
|
|
|
|
TEST_CASE(test_signed_bigint_bitwise_not)
|
|
{
|
|
EXPECT_EQ("3"_sbigint.bitwise_not(), "-4"_sbigint);
|
|
EXPECT_EQ("-1"_sbigint.bitwise_not(), "0"_sbigint);
|
|
}
|
|
|
|
TEST_CASE(test_signed_bigint_bitwise_and)
|
|
{
|
|
auto num1 = "-1234567"_sbigint;
|
|
auto num2 = "1234567"_sbigint;
|
|
EXPECT_EQ(num1.bitwise_and(num1), num1);
|
|
EXPECT_EQ(num1.bitwise_and(num2), "1"_sbigint);
|
|
EXPECT_EQ(num2.bitwise_and(num1), "1"_sbigint);
|
|
EXPECT_EQ(num2.bitwise_and(num2), num2);
|
|
|
|
EXPECT_EQ("-3"_sbigint.bitwise_and("-2"_sbigint), "-4"_sbigint);
|
|
}
|
|
|
|
TEST_CASE(test_bigint_bitwise_xor)
|
|
{
|
|
auto num1 = "1234567"_bigint;
|
|
auto num2 = "1234561"_bigint;
|
|
EXPECT_EQ(num1.bitwise_xor(num2), 6);
|
|
}
|
|
|
|
TEST_CASE(test_bigint_bitwise_xor_different_lengths)
|
|
{
|
|
auto num1 = "1234567"_bigint;
|
|
auto num2 = "123456789012345678901234567890"_bigint;
|
|
EXPECT_EQ(num1.bitwise_xor(num2), "123456789012345678901233441877"_bigint);
|
|
}
|
|
|
|
TEST_CASE(test_signed_bigint_bitwise_xor)
|
|
{
|
|
auto num1 = "-3"_sbigint;
|
|
auto num2 = "1"_sbigint;
|
|
EXPECT_EQ(num1.bitwise_xor(num1), "0"_sbigint);
|
|
EXPECT_EQ(num1.bitwise_xor(num2), "-4"_sbigint);
|
|
EXPECT_EQ(num2.bitwise_xor(num1), "-4"_sbigint);
|
|
EXPECT_EQ(num2.bitwise_xor(num2), "0"_sbigint);
|
|
}
|
|
|
|
TEST_CASE(test_signed_bigint_fibo500)
|
|
{
|
|
Vector<u32> expected_result {
|
|
315178285, 505575602, 1883328078, 125027121,
|
|
3649625763, 347570207, 74535262, 3832543808,
|
|
2472133297, 1600064941, 65273441
|
|
};
|
|
auto result = bigint_signed_fibonacci(500);
|
|
EXPECT_EQ(result.unsigned_value().words(), expected_result);
|
|
}
|
|
|
|
TEST_CASE(test_signed_addition_edgecase_borrow_with_zero)
|
|
{
|
|
Crypto::SignedBigInteger num1 { Crypto::UnsignedBigInteger { { UINT32_MAX - 3, UINT32_MAX } }, false };
|
|
Crypto::SignedBigInteger num2 { Crypto::UnsignedBigInteger { UINT32_MAX - 2 }, false };
|
|
Vector<u32> expected_result { 4294967289, 0, 1 };
|
|
EXPECT_EQ(num1.plus(num2).unsigned_value().words(), expected_result);
|
|
}
|
|
|
|
TEST_CASE(test_signed_addition_edgecase_addition_to_other_sign)
|
|
{
|
|
Crypto::SignedBigInteger num1 = INT32_MAX;
|
|
Crypto::SignedBigInteger num2 = num1;
|
|
num2.negate();
|
|
EXPECT_EQ(num1.plus(num2), Crypto::SignedBigInteger { 0 });
|
|
}
|
|
|
|
TEST_CASE(test_signed_subtraction_simple_subtraction_positive_result)
|
|
{
|
|
Crypto::SignedBigInteger num1(80);
|
|
Crypto::SignedBigInteger num2(70);
|
|
EXPECT_EQ(num1.minus(num2), Crypto::SignedBigInteger(10));
|
|
}
|
|
|
|
TEST_CASE(test_signed_subtraction_simple_subtraction_negative_result)
|
|
{
|
|
Crypto::SignedBigInteger num1(50);
|
|
Crypto::SignedBigInteger num2(70);
|
|
|
|
EXPECT_EQ(num1.minus(num2), Crypto::SignedBigInteger { -20 });
|
|
}
|
|
|
|
TEST_CASE(test_signed_subtraction_both_negative)
|
|
{
|
|
Crypto::SignedBigInteger num1(-50);
|
|
Crypto::SignedBigInteger num2(-70);
|
|
|
|
EXPECT_EQ(num1.minus(num2), Crypto::SignedBigInteger { 20 });
|
|
EXPECT_EQ(num2.minus(num1), Crypto::SignedBigInteger { -20 });
|
|
}
|
|
|
|
TEST_CASE(test_signed_subtraction_simple_subtraction_with_borrow)
|
|
{
|
|
Crypto::SignedBigInteger num1(Crypto::UnsignedBigInteger { UINT32_MAX });
|
|
Crypto::SignedBigInteger num2(1);
|
|
Crypto::SignedBigInteger num3 = num1.plus(num2);
|
|
Crypto::SignedBigInteger result = num2.minus(num3);
|
|
num1.negate();
|
|
EXPECT_EQ(result, num1);
|
|
}
|
|
|
|
TEST_CASE(test_signed_subtraction_with_large_numbers)
|
|
{
|
|
Crypto::SignedBigInteger num1 = bigint_signed_fibonacci(343);
|
|
Crypto::SignedBigInteger num2 = bigint_signed_fibonacci(218);
|
|
Crypto::SignedBigInteger result = num2.minus(num1);
|
|
auto expected = Crypto::UnsignedBigInteger { Vector<u32> { 811430588, 2958904896, 1130908877, 2830569969, 3243275482, 3047460725, 774025231, 7990 } };
|
|
EXPECT_EQ(result.plus(num1), num2);
|
|
EXPECT_EQ(result.unsigned_value(), expected);
|
|
}
|
|
|
|
TEST_CASE(test_signed_subtraction_with_large_numbers_check_for_assertion)
|
|
{
|
|
Crypto::SignedBigInteger num1(Crypto::UnsignedBigInteger { Vector<u32> { 1483061863, 446680044, 1123294122, 191895498, 3347106536, 16, 0, 0, 0 } });
|
|
Crypto::SignedBigInteger num2(Crypto::UnsignedBigInteger { Vector<u32> { 4196414175, 1117247942, 1123294122, 191895498, 3347106536, 16 } });
|
|
Crypto::SignedBigInteger result = num1.minus(num2);
|
|
// this test only verifies that we don't crash on an assertion
|
|
}
|
|
|
|
TEST_CASE(test_signed_multiplication_with_negative_number)
|
|
{
|
|
Crypto::SignedBigInteger num1(8);
|
|
Crypto::SignedBigInteger num2(-251);
|
|
Crypto::SignedBigInteger result = num1.multiplied_by(num2);
|
|
EXPECT_EQ(result, Crypto::SignedBigInteger { -2008 });
|
|
}
|
|
|
|
TEST_CASE(test_signed_multiplication_with_big_number)
|
|
{
|
|
Crypto::SignedBigInteger num1 = bigint_signed_fibonacci(200);
|
|
Crypto::SignedBigInteger num2(-12345678);
|
|
Crypto::SignedBigInteger result = num1.multiplied_by(num2);
|
|
Vector<u32> expected_result { 669961318, 143970113, 4028714974, 3164551305, 1589380278, 2 };
|
|
EXPECT_EQ(result.unsigned_value().words(), expected_result);
|
|
EXPECT(result.is_negative());
|
|
}
|
|
|
|
TEST_CASE(test_signed_multiplication_with_two_big_numbers)
|
|
{
|
|
Crypto::SignedBigInteger num1 = bigint_signed_fibonacci(200);
|
|
Crypto::SignedBigInteger num2 = bigint_signed_fibonacci(341);
|
|
num1.negate();
|
|
Crypto::SignedBigInteger result = num1.multiplied_by(num2);
|
|
Vector<u32> expected_results {
|
|
3017415433, 2741793511, 1957755698, 3731653885,
|
|
3154681877, 785762127, 3200178098, 4260616581,
|
|
529754471, 3632684436, 1073347813, 2516430
|
|
};
|
|
EXPECT_EQ(result.unsigned_value().words(), expected_results);
|
|
EXPECT(result.is_negative());
|
|
}
|
|
|
|
TEST_CASE(test_negative_zero_is_not_allowed)
|
|
{
|
|
Crypto::SignedBigInteger zero(Crypto::UnsignedBigInteger(0), true);
|
|
EXPECT(!zero.is_negative());
|
|
|
|
zero.negate();
|
|
EXPECT(!zero.is_negative());
|
|
|
|
Crypto::SignedBigInteger positive_five(Crypto::UnsignedBigInteger(5), false);
|
|
Crypto::SignedBigInteger negative_five(Crypto::UnsignedBigInteger(5), true);
|
|
zero = positive_five.plus(negative_five);
|
|
|
|
EXPECT(zero.unsigned_value().is_zero());
|
|
EXPECT(!zero.is_negative());
|
|
}
|
|
|
|
TEST_CASE(double_comparisons) {
|
|
#define EXPECT_LESS_THAN(bigint, double_value) EXPECT_EQ(bigint.compare_to_double(double_value), Crypto::UnsignedBigInteger::CompareResult::DoubleGreaterThanBigInt)
|
|
#define EXPECT_GREATER_THAN(bigint, double_value) EXPECT_EQ(bigint.compare_to_double(double_value), Crypto::UnsignedBigInteger::CompareResult::DoubleLessThanBigInt)
|
|
#define EXPECT_EQUAL_TO(bigint, double_value) EXPECT_EQ(bigint.compare_to_double(double_value), Crypto::UnsignedBigInteger::CompareResult::DoubleEqualsBigInt)
|
|
{ Crypto::SignedBigInteger zero { 0 };
|
|
EXPECT_EQUAL_TO(zero, 0.0);
|
|
EXPECT_EQUAL_TO(zero, -0.0);
|
|
}
|
|
|
|
{
|
|
Crypto::SignedBigInteger one { 1 };
|
|
EXPECT_EQUAL_TO(one, 1.0);
|
|
EXPECT_GREATER_THAN(one, -1.0);
|
|
EXPECT_GREATER_THAN(one, 0.5);
|
|
EXPECT_GREATER_THAN(one, -0.5);
|
|
EXPECT_LESS_THAN(one, 1.000001);
|
|
|
|
one.negate();
|
|
auto const& negative_one = one;
|
|
EXPECT_EQUAL_TO(negative_one, -1.0);
|
|
EXPECT_LESS_THAN(negative_one, 1.0);
|
|
EXPECT_LESS_THAN(one, 0.5);
|
|
EXPECT_LESS_THAN(one, -0.5);
|
|
EXPECT_GREATER_THAN(one, -1.5);
|
|
EXPECT_LESS_THAN(one, 1.000001);
|
|
EXPECT_GREATER_THAN(one, -1.000001);
|
|
}
|
|
|
|
{
|
|
double double_infinity = HUGE_VAL;
|
|
VERIFY(isinf(double_infinity));
|
|
Crypto::SignedBigInteger one { 1 };
|
|
EXPECT_LESS_THAN(one, double_infinity);
|
|
EXPECT_GREATER_THAN(one, -double_infinity);
|
|
}
|
|
|
|
{
|
|
double double_max_value = NumericLimits<double>::max();
|
|
double double_below_max_value = nextafter(double_max_value, 0.0);
|
|
VERIFY(double_below_max_value < double_max_value);
|
|
VERIFY(double_below_max_value < (double_max_value - 1.0));
|
|
auto max_value_in_bigint = TRY_OR_FAIL(Crypto::SignedBigInteger::from_base(16, "fffffffffffff800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"sv));
|
|
auto max_value_plus_one = max_value_in_bigint.plus(Crypto::SignedBigInteger { 1 });
|
|
auto max_value_minus_one = max_value_in_bigint.minus(Crypto::SignedBigInteger { 1 });
|
|
|
|
auto below_max_value_in_bigint = TRY_OR_FAIL(Crypto::SignedBigInteger::from_base(16, "fffffffffffff000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"sv));
|
|
|
|
EXPECT_EQUAL_TO(max_value_in_bigint, double_max_value);
|
|
EXPECT_LESS_THAN(max_value_minus_one, double_max_value);
|
|
EXPECT_GREATER_THAN(max_value_plus_one, double_max_value);
|
|
EXPECT_LESS_THAN(below_max_value_in_bigint, double_max_value);
|
|
|
|
EXPECT_GREATER_THAN(max_value_in_bigint, double_below_max_value);
|
|
EXPECT_GREATER_THAN(max_value_minus_one, double_below_max_value);
|
|
EXPECT_GREATER_THAN(max_value_plus_one, double_below_max_value);
|
|
EXPECT_EQUAL_TO(below_max_value_in_bigint, double_below_max_value);
|
|
}
|
|
|
|
{
|
|
double double_min_value = NumericLimits<double>::lowest();
|
|
double double_above_min_value = nextafter(double_min_value, 0.0);
|
|
VERIFY(double_above_min_value > double_min_value);
|
|
VERIFY(double_above_min_value > (double_min_value + 1.0));
|
|
auto min_value_in_bigint = TRY_OR_FAIL(Crypto::SignedBigInteger::from_base(16, "-fffffffffffff800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"sv));
|
|
auto min_value_plus_one = min_value_in_bigint.plus(Crypto::SignedBigInteger { 1 });
|
|
auto min_value_minus_one = min_value_in_bigint.minus(Crypto::SignedBigInteger { 1 });
|
|
|
|
auto above_min_value_in_bigint = TRY_OR_FAIL(Crypto::SignedBigInteger::from_base(16, "-fffffffffffff000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"sv));
|
|
|
|
EXPECT_EQUAL_TO(min_value_in_bigint, double_min_value);
|
|
EXPECT_LESS_THAN(min_value_minus_one, double_min_value);
|
|
EXPECT_GREATER_THAN(min_value_plus_one, double_min_value);
|
|
EXPECT_GREATER_THAN(above_min_value_in_bigint, double_min_value);
|
|
|
|
EXPECT_LESS_THAN(min_value_in_bigint, double_above_min_value);
|
|
EXPECT_LESS_THAN(min_value_minus_one, double_above_min_value);
|
|
EXPECT_LESS_THAN(min_value_plus_one, double_above_min_value);
|
|
EXPECT_EQUAL_TO(above_min_value_in_bigint, double_above_min_value);
|
|
}
|
|
|
|
{
|
|
double just_above_255 = bit_cast<double>(0x406fe00000000001ULL);
|
|
double just_below_255 = bit_cast<double>(0x406fdfffffffffffULL);
|
|
double double_255 = 255.0;
|
|
Crypto::SignedBigInteger bigint_255 { 255 };
|
|
|
|
EXPECT_EQUAL_TO(bigint_255, double_255);
|
|
EXPECT_GREATER_THAN(bigint_255, just_below_255);
|
|
EXPECT_LESS_THAN(bigint_255, just_above_255);
|
|
}
|
|
|
|
#undef EXPECT_LESS_THAN
|
|
#undef EXPECT_GREATER_THAN
|
|
#undef EXPECT_EQUAL_TO
|
|
}
|
|
|
|
TEST_CASE(to_double)
|
|
{
|
|
#define EXPECT_TO_EQUAL_DOUBLE(bigint, double_value) \
|
|
EXPECT_EQ((bigint).to_double(Crypto::UnsignedBigInteger::RoundingMode::RoundTowardZero), double_value)
|
|
|
|
EXPECT_TO_EQUAL_DOUBLE(Crypto::UnsignedBigInteger(0), 0.0);
|
|
// Make sure we don't get negative zero!
|
|
EXPECT_EQ(signbit(Crypto::UnsignedBigInteger(0).to_double()), 0);
|
|
{
|
|
Crypto::SignedBigInteger zero { 0 };
|
|
|
|
EXPECT(!zero.is_negative());
|
|
EXPECT_TO_EQUAL_DOUBLE(zero, 0.0);
|
|
EXPECT_EQ(signbit(zero.to_double()), 0);
|
|
|
|
zero.negate();
|
|
|
|
EXPECT(!zero.is_negative());
|
|
EXPECT_TO_EQUAL_DOUBLE(zero, 0.0);
|
|
EXPECT_EQ(signbit(zero.to_double()), 0);
|
|
}
|
|
|
|
EXPECT_TO_EQUAL_DOUBLE(Crypto::UnsignedBigInteger(9682), 9682.0);
|
|
EXPECT_TO_EQUAL_DOUBLE(Crypto::SignedBigInteger(-9660), -9660.0);
|
|
|
|
double double_max_value = NumericLimits<double>::max();
|
|
double infinity = INFINITY;
|
|
|
|
EXPECT_TO_EQUAL_DOUBLE(
|
|
TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "fffffffffffff800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"sv)),
|
|
double_max_value);
|
|
|
|
EXPECT_TO_EQUAL_DOUBLE(
|
|
TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "ffffffffffffff00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"sv)),
|
|
double_max_value);
|
|
|
|
EXPECT_TO_EQUAL_DOUBLE(
|
|
TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"sv)),
|
|
double_max_value);
|
|
|
|
EXPECT_TO_EQUAL_DOUBLE(
|
|
TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"sv)),
|
|
infinity);
|
|
|
|
EXPECT_TO_EQUAL_DOUBLE(
|
|
TRY_OR_FAIL(Crypto::SignedBigInteger::from_base(16, "-fffffffffffff800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"sv)),
|
|
-double_max_value);
|
|
|
|
EXPECT_TO_EQUAL_DOUBLE(
|
|
TRY_OR_FAIL(Crypto::SignedBigInteger::from_base(16, "-ffffffffffffff00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"sv)),
|
|
-double_max_value);
|
|
|
|
EXPECT_TO_EQUAL_DOUBLE(
|
|
TRY_OR_FAIL(Crypto::SignedBigInteger::from_base(16, "-ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"sv)),
|
|
-double_max_value);
|
|
|
|
EXPECT_TO_EQUAL_DOUBLE(
|
|
TRY_OR_FAIL(Crypto::SignedBigInteger::from_base(16, "-10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"sv)),
|
|
-infinity);
|
|
|
|
EXPECT_TO_EQUAL_DOUBLE(
|
|
TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "ffffffffffffffff"sv)),
|
|
18446744073709549568.0);
|
|
|
|
EXPECT_TO_EQUAL_DOUBLE(
|
|
TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "fffffffffffff800"sv)),
|
|
18446744073709549568.0);
|
|
|
|
EXPECT_TO_EQUAL_DOUBLE(
|
|
TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "fffffffffffff8ff"sv)),
|
|
18446744073709549568.0);
|
|
|
|
EXPECT_TO_EQUAL_DOUBLE(TRY_OR_FAIL(Crypto::SignedBigInteger::from_base(10, "1234567890123456789"sv)),
|
|
1234567890123456800.0);
|
|
|
|
EXPECT_TO_EQUAL_DOUBLE(TRY_OR_FAIL(Crypto::SignedBigInteger::from_base(10, "2345678901234567890"sv)),
|
|
2345678901234567680.0);
|
|
|
|
EXPECT_EQ(
|
|
TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "1fffffffffffff00"sv)).to_double(Crypto::UnsignedBigInteger::RoundingMode::IEEERoundAndTiesToEvenMantissa),
|
|
2305843009213693696.0);
|
|
|
|
EXPECT_EQ(
|
|
TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "1fffffffffffff00"sv)).to_double(Crypto::UnsignedBigInteger::RoundingMode::RoundTowardZero),
|
|
2305843009213693696.0);
|
|
|
|
EXPECT_EQ(
|
|
TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "1fffffffffffff80"sv)).to_double(Crypto::UnsignedBigInteger::RoundingMode::IEEERoundAndTiesToEvenMantissa),
|
|
2305843009213693952.0);
|
|
|
|
EXPECT_EQ(TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "20000000000001"sv)).to_double(Crypto::UnsignedBigInteger::RoundingMode::IEEERoundAndTiesToEvenMantissa),
|
|
9007199254740992.0);
|
|
|
|
EXPECT_EQ(TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "20000000000002"sv)).to_double(Crypto::UnsignedBigInteger::RoundingMode::IEEERoundAndTiesToEvenMantissa),
|
|
9007199254740994.0);
|
|
|
|
// 2^53 = 20000000000000, +3 Rounds up because of tiesRoundToEven
|
|
EXPECT_EQ(TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "20000000000003"sv)).to_double(Crypto::UnsignedBigInteger::RoundingMode::IEEERoundAndTiesToEvenMantissa),
|
|
9007199254740996.0);
|
|
|
|
// +4 is exactly 9007199254740996
|
|
EXPECT_EQ(TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "20000000000004"sv)).to_double(Crypto::UnsignedBigInteger::RoundingMode::IEEERoundAndTiesToEvenMantissa),
|
|
9007199254740996.0);
|
|
|
|
// +5 rounds down because of tiesRoundToEven
|
|
EXPECT_EQ(TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "20000000000005"sv)).to_double(Crypto::UnsignedBigInteger::RoundingMode::IEEERoundAndTiesToEvenMantissa),
|
|
9007199254740996.0);
|
|
|
|
EXPECT_EQ(TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "20000000000006"sv)).to_double(Crypto::UnsignedBigInteger::RoundingMode::IEEERoundAndTiesToEvenMantissa),
|
|
9007199254740998.0);
|
|
|
|
EXPECT_EQ(TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(10, "98382635059784269824"sv)).to_double(Crypto::UnsignedBigInteger::RoundingMode::IEEERoundAndTiesToEvenMantissa),
|
|
bit_cast<double>(0x4415555555555555ULL));
|
|
|
|
#undef EXPECT_TO_EQUAL_DOUBLE
|
|
}
|
|
|
|
TEST_CASE(bigint_from_double)
|
|
{
|
|
{
|
|
Crypto::UnsignedBigInteger from_zero { 0.0 };
|
|
EXPECT(from_zero.is_zero());
|
|
EXPECT(!from_zero.is_invalid());
|
|
}
|
|
|
|
#define SURVIVES_ROUND_TRIP_UNSIGNED(double_value) \
|
|
{ \
|
|
Crypto::UnsignedBigInteger bigint { (double_value) }; \
|
|
EXPECT_EQ(bigint.to_double(), (double_value)); \
|
|
}
|
|
|
|
SURVIVES_ROUND_TRIP_UNSIGNED(0.0);
|
|
SURVIVES_ROUND_TRIP_UNSIGNED(1.0);
|
|
SURVIVES_ROUND_TRIP_UNSIGNED(100000.0);
|
|
SURVIVES_ROUND_TRIP_UNSIGNED(1000000000000.0);
|
|
SURVIVES_ROUND_TRIP_UNSIGNED(10000000000000000000.0);
|
|
SURVIVES_ROUND_TRIP_UNSIGNED(NumericLimits<double>::max());
|
|
|
|
SURVIVES_ROUND_TRIP_UNSIGNED(bit_cast<double>(0x4340000000000002ULL));
|
|
SURVIVES_ROUND_TRIP_UNSIGNED(bit_cast<double>(0x4340000000000001ULL));
|
|
SURVIVES_ROUND_TRIP_UNSIGNED(bit_cast<double>(0x4340000000000000ULL));
|
|
|
|
// Failed on last bits of mantissa
|
|
SURVIVES_ROUND_TRIP_UNSIGNED(bit_cast<double>(0x7EDFFFFFFFFFFFFFULL));
|
|
SURVIVES_ROUND_TRIP_UNSIGNED(bit_cast<double>(0x7ed5555555555555ULL));
|
|
SURVIVES_ROUND_TRIP_UNSIGNED(bit_cast<double>(0x7EDCBA9876543210ULL));
|
|
|
|
// Has exactly exponent of 32
|
|
SURVIVES_ROUND_TRIP_UNSIGNED(bit_cast<double>(0x41f22f74e0000000ULL));
|
|
|
|
#define SURVIVES_ROUND_TRIP_SIGNED(double_value) \
|
|
{ \
|
|
Crypto::SignedBigInteger bigint_positive { (double_value) }; \
|
|
EXPECT_EQ(bigint_positive.to_double(), (double_value)); \
|
|
Crypto::SignedBigInteger bigint_negative { -(double_value) }; \
|
|
EXPECT_EQ(bigint_negative.to_double(), -(double_value)); \
|
|
EXPECT(bigint_positive != bigint_negative); \
|
|
bigint_positive.negate(); \
|
|
EXPECT(bigint_positive == bigint_negative); \
|
|
}
|
|
|
|
{
|
|
// Negative zero should be converted to positive zero
|
|
double const negative_zero = bit_cast<double>(0x8000000000000000);
|
|
|
|
// However it should give a bit exact +0.0
|
|
Crypto::SignedBigInteger from_negative_zero { negative_zero };
|
|
EXPECT(from_negative_zero.is_zero());
|
|
EXPECT(!from_negative_zero.is_negative());
|
|
double result = from_negative_zero.to_double();
|
|
EXPECT_EQ(result, 0.0);
|
|
EXPECT_EQ(bit_cast<u64>(result), 0ULL);
|
|
}
|
|
|
|
SURVIVES_ROUND_TRIP_SIGNED(1.0);
|
|
SURVIVES_ROUND_TRIP_SIGNED(100000.0);
|
|
SURVIVES_ROUND_TRIP_SIGNED(-1000000000000.0);
|
|
SURVIVES_ROUND_TRIP_SIGNED(10000000000000000000.0);
|
|
SURVIVES_ROUND_TRIP_SIGNED(NumericLimits<double>::max());
|
|
SURVIVES_ROUND_TRIP_SIGNED(NumericLimits<double>::lowest());
|
|
|
|
SURVIVES_ROUND_TRIP_SIGNED(bit_cast<double>(0x4340000000000002ULL));
|
|
SURVIVES_ROUND_TRIP_SIGNED(bit_cast<double>(0x4340000000000001ULL));
|
|
SURVIVES_ROUND_TRIP_SIGNED(bit_cast<double>(0x4340000000000000ULL));
|
|
SURVIVES_ROUND_TRIP_SIGNED(bit_cast<double>(0x7EDFFFFFFFFFFFFFULL));
|
|
SURVIVES_ROUND_TRIP_SIGNED(bit_cast<double>(0x7ed5555555555555ULL));
|
|
SURVIVES_ROUND_TRIP_SIGNED(bit_cast<double>(0x7EDCBA9876543210ULL));
|
|
|
|
#undef SURVIVES_ROUND_TRIP_SIGNED
|
|
#undef SURVIVES_ROUND_TRIP_UNSIGNED
|
|
}
|
|
|
|
TEST_CASE(unsigned_bigint_double_comparisons)
|
|
{
|
|
#define EXPECT_LESS_THAN(bigint, double_value) EXPECT_EQ(bigint.compare_to_double(double_value), Crypto::UnsignedBigInteger::CompareResult::DoubleGreaterThanBigInt)
|
|
#define EXPECT_GREATER_THAN(bigint, double_value) EXPECT_EQ(bigint.compare_to_double(double_value), Crypto::UnsignedBigInteger::CompareResult::DoubleLessThanBigInt)
|
|
#define EXPECT_EQUAL_TO(bigint, double_value) EXPECT_EQ(bigint.compare_to_double(double_value), Crypto::UnsignedBigInteger::CompareResult::DoubleEqualsBigInt)
|
|
|
|
{
|
|
Crypto::UnsignedBigInteger zero { 0 };
|
|
EXPECT_EQUAL_TO(zero, 0.0);
|
|
EXPECT_EQUAL_TO(zero, -0.0);
|
|
}
|
|
|
|
{
|
|
Crypto::UnsignedBigInteger one { 1 };
|
|
EXPECT_EQUAL_TO(one, 1.0);
|
|
EXPECT_GREATER_THAN(one, -1.0);
|
|
EXPECT_GREATER_THAN(one, 0.5);
|
|
EXPECT_GREATER_THAN(one, -0.5);
|
|
EXPECT_LESS_THAN(one, 1.000001);
|
|
}
|
|
|
|
{
|
|
double double_infinity = HUGE_VAL;
|
|
VERIFY(isinf(double_infinity));
|
|
Crypto::UnsignedBigInteger one { 1 };
|
|
EXPECT_LESS_THAN(one, double_infinity);
|
|
EXPECT_GREATER_THAN(one, -double_infinity);
|
|
}
|
|
|
|
{
|
|
double double_max_value = NumericLimits<double>::max();
|
|
double double_below_max_value = nextafter(double_max_value, 0.0);
|
|
VERIFY(double_below_max_value < double_max_value);
|
|
VERIFY(double_below_max_value < (double_max_value - 1.0));
|
|
auto max_value_in_bigint = TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "fffffffffffff800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"sv));
|
|
auto max_value_plus_one = max_value_in_bigint.plus(Crypto::UnsignedBigInteger { 1 });
|
|
auto max_value_minus_one = max_value_in_bigint.minus(Crypto::UnsignedBigInteger { 1 });
|
|
|
|
auto below_max_value_in_bigint = TRY_OR_FAIL(Crypto::UnsignedBigInteger::from_base(16, "fffffffffffff000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"sv));
|
|
|
|
EXPECT_EQUAL_TO(max_value_in_bigint, double_max_value);
|
|
EXPECT_LESS_THAN(max_value_minus_one, double_max_value);
|
|
EXPECT_GREATER_THAN(max_value_plus_one, double_max_value);
|
|
EXPECT_LESS_THAN(below_max_value_in_bigint, double_max_value);
|
|
|
|
EXPECT_GREATER_THAN(max_value_in_bigint, double_below_max_value);
|
|
EXPECT_GREATER_THAN(max_value_minus_one, double_below_max_value);
|
|
EXPECT_GREATER_THAN(max_value_plus_one, double_below_max_value);
|
|
EXPECT_EQUAL_TO(below_max_value_in_bigint, double_below_max_value);
|
|
}
|
|
|
|
{
|
|
double just_above_255 = bit_cast<double>(0x406fe00000000001ULL);
|
|
double just_below_255 = bit_cast<double>(0x406fdfffffffffffULL);
|
|
double double_255 = 255.0;
|
|
Crypto::UnsignedBigInteger bigint_255 { 255 };
|
|
|
|
EXPECT_EQUAL_TO(bigint_255, double_255);
|
|
EXPECT_GREATER_THAN(bigint_255, just_below_255);
|
|
EXPECT_LESS_THAN(bigint_255, just_above_255);
|
|
}
|
|
|
|
#undef EXPECT_LESS_THAN
|
|
#undef EXPECT_GREATER_THAN
|
|
#undef EXPECT_EQUAL_TO
|
|
}
|
|
|
|
namespace AK {
|
|
|
|
template<>
|
|
struct Formatter<Crypto::UnsignedBigInteger::CompareResult> : Formatter<StringView> {
|
|
ErrorOr<void> format(FormatBuilder& builder, Crypto::UnsignedBigInteger::CompareResult const& compare_result)
|
|
{
|
|
switch (compare_result) {
|
|
case Crypto::UnsignedBigInteger::CompareResult::DoubleEqualsBigInt:
|
|
return builder.put_string("Equals"sv);
|
|
case Crypto::UnsignedBigInteger::CompareResult::DoubleLessThanBigInt:
|
|
return builder.put_string("LessThan"sv);
|
|
case Crypto::UnsignedBigInteger::CompareResult::DoubleGreaterThanBigInt:
|
|
return builder.put_string("GreaterThan"sv);
|
|
default:
|
|
return builder.put_string("???"sv);
|
|
}
|
|
}
|
|
};
|
|
|
|
}
|