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LibCrypto: Implement arbitrarily sized right shifts

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Previously we could only shift by words at a time
This commit is contained in:
Hendiadyoin1
2024-03-18 00:40:03 +01:00
committed by Andrew Kaster
parent 9045840e33
commit 1af9fa1968
6 changed files with 34 additions and 0 deletions
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3
Userland/Libraries/LibCrypto/BigInt/Algorithms/UnsignedBigIntegerAlgorithms.h
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@@ -11,6 +11,8 @@
namespace Crypto {
class UnsignedBigIntegerAlgorithms {
using Ops = AK::StorageOperations<UnsignedBigInteger::Word>;
public:
static void add_without_allocation(UnsignedBigInteger const& left, UnsignedBigInteger const& right, UnsignedBigInteger& output);
static void add_into_accumulator_without_allocation(UnsignedBigInteger& accumulator, UnsignedBigInteger const& value);
@@ -20,6 +22,7 @@ public:
static void bitwise_xor_without_allocation(UnsignedBigInteger const& left, UnsignedBigInteger const& right, UnsignedBigInteger& output);
static void bitwise_not_fill_to_one_based_index_without_allocation(UnsignedBigInteger const& left, size_t, UnsignedBigInteger& output);
static void shift_left_without_allocation(UnsignedBigInteger const& number, size_t bits_to_shift_by, UnsignedBigInteger& temp_result, UnsignedBigInteger& temp_plus, UnsignedBigInteger& output);
static void shift_right_without_allocation(UnsignedBigInteger const& number, size_t num_bits, UnsignedBigInteger& output);
static void multiply_without_allocation(UnsignedBigInteger const& left, UnsignedBigInteger const& right, UnsignedBigInteger& temp_shift_result, UnsignedBigInteger& temp_shift_plus, UnsignedBigInteger& temp_shift, UnsignedBigInteger& output);
static void divide_without_allocation(UnsignedBigInteger const& numerator, UnsignedBigInteger const& denominator, UnsignedBigInteger& temp_shift_result, UnsignedBigInteger& temp_shift_plus, UnsignedBigInteger& temp_shift, UnsignedBigInteger& temp_minus, UnsignedBigInteger& quotient, UnsignedBigInteger& remainder);
static void divide_u16_without_allocation(UnsignedBigInteger const& numerator, UnsignedBigInteger::Word denominator, UnsignedBigInteger& quotient, UnsignedBigInteger& remainder);