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LibCrypto: Add UnsignedBigInteger multiplication

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Also added documentation for the runtime complexity of some operations.
This commit is contained in:
Itamar 2020-04-08 19:04:36 +03:00 • committed by Andreas Kling
parent 2843dce498
commit 2959c4a5e9
3 changed files with 150 additions and 4 deletions
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42
Userland/test-crypto.cpp
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@ -305,6 +305,7 @@ void hmac_sha512_test_process();
void bigint_test_fibo500();
void bigint_addition_edgecases();
void bigint_subtraction();
void bigint_multiplication();
int aes_cbc_tests()
{
@ -799,6 +800,7 @@ int bigint_tests()
bigint_test_fibo500();
bigint_addition_edgecases();
bigint_subtraction();
bigint_multiplication();
return 0;
}
@ -851,6 +853,8 @@ void bigint_addition_edgecases()
PASS;
} else {
FAIL(Incorrect Result);
}
}
}
void bigint_subtraction()
@ -902,3 +906,41 @@ void bigint_subtraction()
}
}
}
void bigint_multiplication()
{
{
I_TEST((BigInteger | Simple Multipliction));
Crypto::UnsignedBigInteger num1(8);
Crypto::UnsignedBigInteger num2(251);
Crypto::UnsignedBigInteger result = num1.multiply(num2);
dbg() << "result: " << result;
if (result.words() == Vector<u32> { 2008 }) {
PASS;
} else {
FAIL(Incorrect Result);
}
}
{
I_TEST((BigInteger | Multiplications with big numbers 1));
Crypto::UnsignedBigInteger num1 = bigint_fibonacci(200);
Crypto::UnsignedBigInteger num2(12345678);
Crypto::UnsignedBigInteger result = num1.multiply(num2);
if (result.words() == Vector<u32> { 669961318, 143970113, 4028714974, 3164551305, 1589380278, 2 }) {
PASS;
} else {
FAIL(Incorrect Result);
}
}
{
I_TEST((BigInteger | Multiplications with big numbers 2));
Crypto::UnsignedBigInteger num1 = bigint_fibonacci(200);
Crypto::UnsignedBigInteger num2 = bigint_fibonacci(341);
Crypto::UnsignedBigInteger result = num1.multiply(num2);
if (result.words() == Vector<u32> { 3017415433, 2741793511, 1957755698, 3731653885, 3154681877, 785762127, 3200178098, 4260616581, 529754471, 3632684436, 1073347813, 2516430 }) {
PASS;
} else {
FAIL(Incorrect Result);
}
}
}