OpenWebNet password: Difference between revisions
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PASS 12345 410501656 119537670 119537670
PASS 12345 630292165 4269684735 4269684735
</pre>
=={{header|C++}}==
<syntaxhighlight lang="c++">
#include <cstdint>
#include <iostream>
#include <string>
int64_t own_password_calculation(const int64_t& password, const std::string& nonce) {
const int64_t m1 = 0xFFFF'FFFFL;
const int64_t m8 = 0xFFFF'FFF8L;
const int64_t m16 = 0xFFFF'FFF0L;
const int64_t m128 = 0xFFFF'FF80L;
const int64_t m16777216 = 0xFF00'0000L;
bool flag = true;
int64_t number1 = 0;
int64_t number2 = 0;
for ( char ch : nonce ) {
number2 = number2 & m1;
switch (ch) {
case '1':
if ( flag ) { number2 = password; }
flag = false;
number1 = number2 & m128;
number1 = number1 >> 7;
number2 = number2 << 25;
number1 = number1 + number2;
break;
case '2':
if ( flag ) { number2 = password; }
flag = false;
number1 = number2 & m16;
number1 = number1 >> 4;
number2 = number2 << 28;
number1 = number1 + number2;
break;
case '3':
if ( flag ) { number2 = password; }
flag = false;
number1 = number2 & m8;
number1 = number1 >> 3;
number2 = number2 << 29;
number1 = number1 + number2;
break;
case '4':
if ( flag ) { number2 = password; }
flag = false;
number1 = number2 << 1;
number2 = number2 >> 31;
number1 = number1 + number2;
break;
case '5':
if ( flag ) { number2 = password; }
flag = false;
number1 = number2 << 5;
number2 = number2 >> 27;
number1 = number1 + number2;
break;
case '6':
if ( flag ) { number2 = password; }
flag = false;
number1 = number2 << 12;
number2 = number2 >> 20;
number1 = number1 + number2;
break;
case '7':
if ( flag ) { number2 = password; }
flag = false;
number1 = number2 & 0xFF00L;
number1 = number1 + ( ( number2 & 0xFFL ) << 24 );
number1 = number1 + ( ( number2 & 0xFF0000L ) >> 16 );
number2 = ( number2 & m16777216 ) >> 8;
number1 = number1 + number2;
break;
case '8':
if ( flag ) { number2 = password;}
flag = false;
number1 = number2 & 0xFFFFL;
number1 = number1 << 16;
number1 = number1 + ( number2 >> 24 );
number2 = number2 & 0xFF0000L;
number2 = number2 >> 8;
number1 = number1 + number2;
break;
case '9':
if ( flag ) { number2 = password; }
flag = false;
number1 = ~number2;
break;
default:
number1 = number2;
break;
}
number2 = number1;
}
return number1 & m1;
}
void own_password_calculation_test(const std::string& password, const std::string& nonce, const int64_t& expected) {
const int64_t result = own_password_calculation(std::stoll(password), nonce);
std::string message = password + " " + nonce + " " + std::to_string(result) + " " + std::to_string(expected);
std::cout << ( ( result == expected ) ? "PASS " + message : "FAIL " + message ) << std::endl;
}
int main() {
own_password_calculation_test("12345", "603356072", 25280520);
own_password_calculation_test("12345", "410501656", 119537670);
}
</syntaxhighlight>
{{ out }}
<pre>
PASS 12345 603356072 25280520 25280520
PASS 12345 410501656 119537670 119537670
</pre>
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