Header Only class to handle (most likely quite poorly) cryptographic numbers.
C++17
Copy the .h file somewhere. Include it. Profit.
Class is templated over how many bytes you want.
BigInt<8> myBigInt(42) for 42 as an 8 bytes (64 bits) integer.
BigInt64 myBigInt(42) is an alias.
BigInt<16> myBigInt("12345678901234567891234567890123456789")
BigInt<32> myBigInt=BigInt<32>::power_of_two(200)
BigInt<BYTES>::pow_mod(a, n, m) to compute a^n[m]
with a, n and m of type BigInt<BYTES>.
a.mult_mod(b, m) to compute (a * b) % m
BigInt64::rand(), BigInt64::rand(max), BigInt64::rand(min, max)
BigIng64, BigIng128, BigIng256, BigIng512 as aliases for
BigInt<8>, BigInt<16>, BigInt<32>, BigInt<64>