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LibCrypto: Move each subsection into its own namespace

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AnotherTest 2020-04-07 14:42:27 +04:30 • committed by Andreas Kling
parent 96dd7c2996
commit 4f89a377a4
9 changed files with 3256 additions and 3228 deletions
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109
Libraries/LibCrypto/Cipher/Mode/Mode.h
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@ -30,68 +30,71 @@
#include <LibCrypto/Cipher/Cipher.h>
namespace Crypto {
namespace Cipher {
template <typename T>
class Mode {
public:
// FIXME: Somehow communicate that encrypt returns the last initialization vector (if the mode supports it)
virtual Optional<ByteBuffer> encrypt(const ByteBuffer& in, ByteBuffer& out, Optional<ByteBuffer> ivec = {}) = 0;
virtual void decrypt(const ByteBuffer& in, ByteBuffer& out, Optional<ByteBuffer> ivec = {}) = 0;
template <typename T>
class Mode {
public:
// FIXME: Somehow communicate that encrypt returns the last initialization vector (if the mode supports it)
virtual Optional<ByteBuffer> encrypt(const ByteBuffer& in, ByteBuffer& out, Optional<ByteBuffer> ivec = {}) = 0;
virtual void decrypt(const ByteBuffer& in, ByteBuffer& out, Optional<ByteBuffer> ivec = {}) = 0;
const T& cipher() const { return m_cipher; }
const T& cipher() const { return m_cipher; }
ByteBuffer create_aligned_buffer(size_t input_size) const
{
size_t remainder = (input_size + T::block_size()) % T::block_size();
if (remainder == 0)
return ByteBuffer::create_uninitialized(input_size);
else
return ByteBuffer::create_uninitialized(input_size + T::block_size() - remainder);
}
ByteBuffer create_aligned_buffer(size_t input_size) const
{
size_t remainder = (input_size + T::block_size()) % T::block_size();
if (remainder == 0)
return ByteBuffer::create_uninitialized(input_size);
else
return ByteBuffer::create_uninitialized(input_size + T::block_size() - remainder);
}
protected:
T& cipher() { return m_cipher; }
protected:
T& cipher() { return m_cipher; }
virtual void prune_padding(ByteBuffer& data)
{
auto size = data.size();
switch (m_cipher.padding_mode()) {
case PaddingMode::CMS: {
auto maybe_padding_length = data[size - 1];
if (maybe_padding_length >= T::block_size()) {
// cannot be padding (the entire block cannot be padding)
return;
}
for (auto i = maybe_padding_length; i > 0; --i) {
if (data[size - i] != maybe_padding_length) {
// not padding, part of data
virtual void prune_padding(ByteBuffer& data)
{
auto size = data.size();
switch (m_cipher.padding_mode()) {
case PaddingMode::CMS: {
auto maybe_padding_length = data[size - 1];
if (maybe_padding_length >= T::block_size()) {
// cannot be padding (the entire block cannot be padding)
return;
}
for (auto i = maybe_padding_length; i > 0; --i) {
if (data[size - i] != maybe_padding_length) {
// not padding, part of data
return;
}
}
data.trim(size - maybe_padding_length);
break;
}
case PaddingMode::Null: {
while (data[size - 1] == 0)
--size;
data.trim(size);
break;
}
default:
// FIXME: support other padding modes
ASSERT_NOT_REACHED();
break;
}
data.trim(size - maybe_padding_length);
break;
}
case PaddingMode::Null: {
while (data[size - 1] == 0)
--size;
data.trim(size);
break;
}
default:
// FIXME: support other padding modes
ASSERT_NOT_REACHED();
break;
}
}
// FIXME: Somehow add a reference version of this
template <typename... Args>
Mode(Args... args)
: m_cipher(args...)
{
}
// FIXME: Somehow add a reference version of this
template <typename... Args>
Mode(Args... args)
: m_cipher(args...)
{
}
private:
T m_cipher;
};
}
private:
T m_cipher;
};
}