118 lines
2.9 KiB
C++
118 lines
2.9 KiB
C++
#include <cstdint>
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#include <iostream>
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#include <string>
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int64_t own_password_calculation(const int64_t& password, const std::string& nonce) {
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const int64_t m1 = 0xFFFF'FFFF;
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const int64_t m8 = 0xFFFF'FFF8;
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const int64_t m16 = 0xFFFF'FFF0;
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const int64_t m128 = 0xFFFF'FF80;
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const int64_t m16777216 = 0xFF00'0000;
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bool flag = true;
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int64_t number1 = 0;
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int64_t number2 = 0;
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for ( char ch : nonce ) {
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number2 = number2 & m1;
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switch (ch) {
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case '1':
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if ( flag ) { number2 = password; }
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flag = false;
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number1 = number2 & m128;
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number1 = number1 >> 7;
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number2 = number2 << 25;
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number1 = number1 + number2;
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break;
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case '2':
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if ( flag ) { number2 = password; }
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flag = false;
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number1 = number2 & m16;
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number1 = number1 >> 4;
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number2 = number2 << 28;
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number1 = number1 + number2;
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break;
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case '3':
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if ( flag ) { number2 = password; }
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flag = false;
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number1 = number2 & m8;
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number1 = number1 >> 3;
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number2 = number2 << 29;
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number1 = number1 + number2;
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break;
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case '4':
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if ( flag ) { number2 = password; }
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flag = false;
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number1 = number2 << 1;
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number2 = number2 >> 31;
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number1 = number1 + number2;
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break;
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case '5':
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if ( flag ) { number2 = password; }
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flag = false;
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number1 = number2 << 5;
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number2 = number2 >> 27;
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number1 = number1 + number2;
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break;
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case '6':
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if ( flag ) { number2 = password; }
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flag = false;
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number1 = number2 << 12;
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number2 = number2 >> 20;
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number1 = number1 + number2;
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break;
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case '7':
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if ( flag ) { number2 = password; }
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flag = false;
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number1 = number2 & 0xFF00L;
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number1 = number1 + ( ( number2 & 0xFFL ) << 24 );
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number1 = number1 + ( ( number2 & 0xFF0000L ) >> 16 );
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number2 = ( number2 & m16777216 ) >> 8;
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number1 = number1 + number2;
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break;
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case '8':
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if ( flag ) { number2 = password;}
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flag = false;
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number1 = number2 & 0xFFFFL;
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number1 = number1 << 16;
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number1 = number1 + ( number2 >> 24 );
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number2 = number2 & 0xFF0000L;
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number2 = number2 >> 8;
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number1 = number1 + number2;
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break;
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case '9':
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if ( flag ) { number2 = password; }
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flag = false;
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number1 = ~number2;
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break;
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default:
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number1 = number2;
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break;
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}
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number2 = number1;
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}
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return number1 & m1;
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}
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void own_password_calculation_test(const std::string& password, const std::string& nonce, const int64_t& expected) {
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const int64_t result = own_password_calculation(std::stoll(password), nonce);
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std::string message = password + " " + nonce + " " + std::to_string(result) + " " + std::to_string(expected);
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std::cout << ( ( result == expected ) ? "PASS " + message : "FAIL " + message ) << std::endl;
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}
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int main() {
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own_password_calculation_test("12345", "603356072", 25280520);
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own_password_calculation_test("12345", "410501656", 119537670);
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}
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