mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 09:42:45 +00:00
LibCrypto: Move each subsection into its own namespace
This commit is contained in:
AnotherTest
Andreas Kling
parent
96dd7c2996
commit
4f89a377a4
9 changed files with 3256 additions and 3228 deletions
|
|
@ -28,395 +28,399 @@
|
|||
#include <LibCrypto/Cipher/AES.h>
|
||||
|
||||
namespace Crypto {
|
||||
namespace Cipher {
|
||||
|
||||
template <typename T>
|
||||
constexpr u32 get_key(T pt)
|
||||
{
|
||||
return ((u32)(pt)[0] << 24) ^ ((u32)(pt)[1] << 16) ^ ((u32)(pt)[2] << 8) ^ ((u32)(pt)[3]);
|
||||
}
|
||||
|
||||
constexpr void swap_keys(u32* keys, size_t i, size_t j)
|
||||
{
|
||||
u32 temp = keys[i];
|
||||
keys[i] = keys[j];
|
||||
keys[j] = temp;
|
||||
}
|
||||
|
||||
String AESCipherBlock::to_string() const
|
||||
{
|
||||
StringBuilder builder;
|
||||
for (size_t i = 0; i < BLOCK_SIZE / 8; ++i)
|
||||
builder.appendf("%02x", m_data[i]);
|
||||
return builder.build();
|
||||
}
|
||||
|
||||
String AESCipherKey::to_string() const
|
||||
{
|
||||
StringBuilder builder;
|
||||
for (size_t i = 0; i < (rounds() + 1) * 4; ++i)
|
||||
builder.appendf("%02x", m_rd_keys[i]);
|
||||
return builder.build();
|
||||
}
|
||||
|
||||
void AESCipherKey::expand_encrypt_key(const StringView& user_key, size_t bits)
|
||||
{
|
||||
u32* round_key;
|
||||
u32 temp;
|
||||
size_t i { 0 };
|
||||
|
||||
ASSERT(!user_key.is_null());
|
||||
ASSERT(is_valid_key_size(bits));
|
||||
|
||||
round_key = round_keys();
|
||||
|
||||
if (bits == 128) {
|
||||
m_rounds = 10;
|
||||
} else if (bits == 192) {
|
||||
m_rounds = 12;
|
||||
} else {
|
||||
m_rounds = 14;
|
||||
template <typename T>
|
||||
constexpr u32 get_key(T pt)
|
||||
{
|
||||
return ((u32)(pt)[0] << 24) ^ ((u32)(pt)[1] << 16) ^ ((u32)(pt)[2] << 8) ^ ((u32)(pt)[3]);
|
||||
}
|
||||
|
||||
round_key[0] = get_key(user_key.substring_view(0, 4).characters_without_null_termination());
|
||||
round_key[1] = get_key(user_key.substring_view(4, 4).characters_without_null_termination());
|
||||
round_key[2] = get_key(user_key.substring_view(8, 4).characters_without_null_termination());
|
||||
round_key[3] = get_key(user_key.substring_view(12, 4).characters_without_null_termination());
|
||||
if (bits == 128) {
|
||||
for (;;) {
|
||||
temp = round_key[3];
|
||||
// clang-format off
|
||||
constexpr void swap_keys(u32* keys, size_t i, size_t j)
|
||||
{
|
||||
u32 temp = keys[i];
|
||||
keys[i] = keys[j];
|
||||
keys[j] = temp;
|
||||
}
|
||||
|
||||
String AESCipherBlock::to_string() const
|
||||
{
|
||||
StringBuilder builder;
|
||||
for (size_t i = 0; i < BLOCK_SIZE / 8; ++i)
|
||||
builder.appendf("%02x", m_data[i]);
|
||||
return builder.build();
|
||||
}
|
||||
|
||||
String AESCipherKey::to_string() const
|
||||
{
|
||||
StringBuilder builder;
|
||||
for (size_t i = 0; i < (rounds() + 1) * 4; ++i)
|
||||
builder.appendf("%02x", m_rd_keys[i]);
|
||||
return builder.build();
|
||||
}
|
||||
|
||||
void AESCipherKey::expand_encrypt_key(const StringView& user_key, size_t bits)
|
||||
{
|
||||
u32* round_key;
|
||||
u32 temp;
|
||||
size_t i { 0 };
|
||||
|
||||
ASSERT(!user_key.is_null());
|
||||
ASSERT(is_valid_key_size(bits));
|
||||
|
||||
round_key = round_keys();
|
||||
|
||||
if (bits == 128) {
|
||||
m_rounds = 10;
|
||||
} else if (bits == 192) {
|
||||
m_rounds = 12;
|
||||
} else {
|
||||
m_rounds = 14;
|
||||
}
|
||||
|
||||
round_key[0] = get_key(user_key.substring_view(0, 4).characters_without_null_termination());
|
||||
round_key[1] = get_key(user_key.substring_view(4, 4).characters_without_null_termination());
|
||||
round_key[2] = get_key(user_key.substring_view(8, 4).characters_without_null_termination());
|
||||
round_key[3] = get_key(user_key.substring_view(12, 4).characters_without_null_termination());
|
||||
if (bits == 128) {
|
||||
for (;;) {
|
||||
temp = round_key[3];
|
||||
// clang-format off
|
||||
round_key[4] = round_key[0] ^
|
||||
(Tables::Encode2[(temp >> 16) & 0xff] & 0xff000000) ^
|
||||
(Tables::Encode3[(temp >> 8) & 0xff] & 0x00ff0000) ^
|
||||
(Tables::Encode0[(temp ) & 0xff] & 0x0000ff00) ^
|
||||
(Tables::Encode1[(temp >> 24) ] & 0x000000ff) ^ Tables::RCON[i];
|
||||
// clang-format on
|
||||
round_key[5] = round_key[1] ^ round_key[4];
|
||||
round_key[6] = round_key[2] ^ round_key[5];
|
||||
round_key[7] = round_key[3] ^ round_key[6];
|
||||
++i;
|
||||
if (i == 10)
|
||||
break;
|
||||
round_key += 4;
|
||||
(AESTables::Encode2[(temp >> 16) & 0xff] & 0xff000000) ^
|
||||
(AESTables::Encode3[(temp >> 8) & 0xff] & 0x00ff0000) ^
|
||||
(AESTables::Encode0[(temp ) & 0xff] & 0x0000ff00) ^
|
||||
(AESTables::Encode1[(temp >> 24) ] & 0x000000ff) ^ AESTables::RCON[i];
|
||||
// clang-format on
|
||||
round_key[5] = round_key[1] ^ round_key[4];
|
||||
round_key[6] = round_key[2] ^ round_key[5];
|
||||
round_key[7] = round_key[3] ^ round_key[6];
|
||||
++i;
|
||||
if (i == 10)
|
||||
break;
|
||||
round_key += 4;
|
||||
}
|
||||
return;
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
round_key[4] = get_key(user_key.substring_view(16, 4).characters_without_null_termination());
|
||||
round_key[5] = get_key(user_key.substring_view(20, 4).characters_without_null_termination());
|
||||
if (bits == 192) {
|
||||
for (;;) {
|
||||
temp = round_key[5];
|
||||
// clang-format off
|
||||
round_key[4] = get_key(user_key.substring_view(16, 4).characters_without_null_termination());
|
||||
round_key[5] = get_key(user_key.substring_view(20, 4).characters_without_null_termination());
|
||||
if (bits == 192) {
|
||||
for (;;) {
|
||||
temp = round_key[5];
|
||||
// clang-format off
|
||||
round_key[6] = round_key[0] ^
|
||||
(Tables::Encode2[(temp >> 16) & 0xff] & 0xff000000) ^
|
||||
(Tables::Encode3[(temp >> 8) & 0xff] & 0x00ff0000) ^
|
||||
(Tables::Encode0[(temp ) & 0xff] & 0x0000ff00) ^
|
||||
(Tables::Encode1[(temp >> 24) ] & 0x000000ff) ^ Tables::RCON[i];
|
||||
// clang-format on
|
||||
round_key[7] = round_key[1] ^ round_key[6];
|
||||
round_key[8] = round_key[2] ^ round_key[7];
|
||||
round_key[9] = round_key[3] ^ round_key[8];
|
||||
(AESTables::Encode2[(temp >> 16) & 0xff] & 0xff000000) ^
|
||||
(AESTables::Encode3[(temp >> 8) & 0xff] & 0x00ff0000) ^
|
||||
(AESTables::Encode0[(temp ) & 0xff] & 0x0000ff00) ^
|
||||
(AESTables::Encode1[(temp >> 24) ] & 0x000000ff) ^ AESTables::RCON[i];
|
||||
// clang-format on
|
||||
round_key[7] = round_key[1] ^ round_key[6];
|
||||
round_key[8] = round_key[2] ^ round_key[7];
|
||||
round_key[9] = round_key[3] ^ round_key[8];
|
||||
|
||||
++i;
|
||||
if (i == 8)
|
||||
break;
|
||||
++i;
|
||||
if (i == 8)
|
||||
break;
|
||||
|
||||
round_key[10] = round_key[4] ^ round_key[9];
|
||||
round_key[11] = round_key[5] ^ round_key[10];
|
||||
round_key[10] = round_key[4] ^ round_key[9];
|
||||
round_key[11] = round_key[5] ^ round_key[10];
|
||||
|
||||
round_key += 6;
|
||||
round_key += 6;
|
||||
}
|
||||
return;
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
round_key[6] = get_key(user_key.substring_view(24, 4).characters_without_null_termination());
|
||||
round_key[7] = get_key(user_key.substring_view(28, 4).characters_without_null_termination());
|
||||
if (true) { // bits == 256
|
||||
for (;;) {
|
||||
temp = round_key[7];
|
||||
// clang-format off
|
||||
round_key[6] = get_key(user_key.substring_view(24, 4).characters_without_null_termination());
|
||||
round_key[7] = get_key(user_key.substring_view(28, 4).characters_without_null_termination());
|
||||
if (true) { // bits == 256
|
||||
for (;;) {
|
||||
temp = round_key[7];
|
||||
// clang-format off
|
||||
round_key[8] = round_key[0] ^
|
||||
(Tables::Encode2[(temp >> 16) & 0xff] & 0xff000000) ^
|
||||
(Tables::Encode3[(temp >> 8) & 0xff] & 0x00ff0000) ^
|
||||
(Tables::Encode0[(temp ) & 0xff] & 0x0000ff00) ^
|
||||
(Tables::Encode1[(temp >> 24) ] & 0x000000ff) ^ Tables::RCON[i];
|
||||
// clang-format on
|
||||
round_key[9] = round_key[1] ^ round_key[8];
|
||||
round_key[10] = round_key[2] ^ round_key[9];
|
||||
round_key[11] = round_key[3] ^ round_key[10];
|
||||
(AESTables::Encode2[(temp >> 16) & 0xff] & 0xff000000) ^
|
||||
(AESTables::Encode3[(temp >> 8) & 0xff] & 0x00ff0000) ^
|
||||
(AESTables::Encode0[(temp ) & 0xff] & 0x0000ff00) ^
|
||||
(AESTables::Encode1[(temp >> 24) ] & 0x000000ff) ^ AESTables::RCON[i];
|
||||
// clang-format on
|
||||
round_key[9] = round_key[1] ^ round_key[8];
|
||||
round_key[10] = round_key[2] ^ round_key[9];
|
||||
round_key[11] = round_key[3] ^ round_key[10];
|
||||
|
||||
++i;
|
||||
if (i == 7)
|
||||
break;
|
||||
|
||||
temp = round_key[11];
|
||||
// clang-format off
|
||||
round_key[12] = round_key[4] ^
|
||||
(AESTables::Encode2[(temp >> 24) ] & 0xff000000) ^
|
||||
(AESTables::Encode3[(temp >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(AESTables::Encode0[(temp >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(AESTables::Encode1[(temp ) & 0xff] & 0x000000ff) ;
|
||||
// clang-format on
|
||||
round_key[13] = round_key[5] ^ round_key[12];
|
||||
round_key[14] = round_key[6] ^ round_key[13];
|
||||
round_key[15] = round_key[7] ^ round_key[14];
|
||||
|
||||
round_key += 8;
|
||||
}
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
void AESCipherKey::expand_decrypt_key(const StringView& user_key, size_t bits)
|
||||
{
|
||||
u32* round_key;
|
||||
|
||||
expand_encrypt_key(user_key, bits);
|
||||
|
||||
round_key = round_keys();
|
||||
|
||||
// reorder round keys
|
||||
for (size_t i = 0, j = 4 * rounds(); i < j; i += 4, j -= 4) {
|
||||
swap_keys(round_key, i, j);
|
||||
swap_keys(round_key, i + 1, j + 1);
|
||||
swap_keys(round_key, i + 2, j + 2);
|
||||
swap_keys(round_key, i + 3, j + 3);
|
||||
}
|
||||
|
||||
// apply inverse mix-column to middle rounds
|
||||
for (size_t i = 1; i < rounds(); ++i) {
|
||||
round_key += 4;
|
||||
// clang-format off
|
||||
round_key[0] =
|
||||
AESTables::Decode0[AESTables::Encode1[(round_key[0] >> 24) ] & 0xff] ^
|
||||
AESTables::Decode1[AESTables::Encode1[(round_key[0] >> 16) & 0xff] & 0xff] ^
|
||||
AESTables::Decode2[AESTables::Encode1[(round_key[0] >> 8) & 0xff] & 0xff] ^
|
||||
AESTables::Decode3[AESTables::Encode1[(round_key[0] ) & 0xff] & 0xff] ;
|
||||
round_key[1] =
|
||||
AESTables::Decode0[AESTables::Encode1[(round_key[1] >> 24) ] & 0xff] ^
|
||||
AESTables::Decode1[AESTables::Encode1[(round_key[1] >> 16) & 0xff] & 0xff] ^
|
||||
AESTables::Decode2[AESTables::Encode1[(round_key[1] >> 8) & 0xff] & 0xff] ^
|
||||
AESTables::Decode3[AESTables::Encode1[(round_key[1] ) & 0xff] & 0xff] ;
|
||||
round_key[2] =
|
||||
AESTables::Decode0[AESTables::Encode1[(round_key[2] >> 24) ] & 0xff] ^
|
||||
AESTables::Decode1[AESTables::Encode1[(round_key[2] >> 16) & 0xff] & 0xff] ^
|
||||
AESTables::Decode2[AESTables::Encode1[(round_key[2] >> 8) & 0xff] & 0xff] ^
|
||||
AESTables::Decode3[AESTables::Encode1[(round_key[2] ) & 0xff] & 0xff] ;
|
||||
round_key[3] =
|
||||
AESTables::Decode0[AESTables::Encode1[(round_key[3] >> 24) ] & 0xff] ^
|
||||
AESTables::Decode1[AESTables::Encode1[(round_key[3] >> 16) & 0xff] & 0xff] ^
|
||||
AESTables::Decode2[AESTables::Encode1[(round_key[3] >> 8) & 0xff] & 0xff] ^
|
||||
AESTables::Decode3[AESTables::Encode1[(round_key[3] ) & 0xff] & 0xff] ;
|
||||
// clang-format on
|
||||
}
|
||||
}
|
||||
|
||||
void AESCipher::encrypt_block(const AESCipherBlock& in, AESCipherBlock& out)
|
||||
{
|
||||
u32 s0, s1, s2, s3, t0, t1, t2, t3;
|
||||
size_t r { 0 };
|
||||
|
||||
const auto& dec_key = key();
|
||||
const auto* round_keys = dec_key.round_keys();
|
||||
|
||||
s0 = get_key(in.data().offset_pointer(0)) ^ round_keys[0];
|
||||
s1 = get_key(in.data().offset_pointer(4)) ^ round_keys[1];
|
||||
s2 = get_key(in.data().offset_pointer(8)) ^ round_keys[2];
|
||||
s3 = get_key(in.data().offset_pointer(12)) ^ round_keys[3];
|
||||
|
||||
r = dec_key.rounds() >> 1;
|
||||
|
||||
// apply the first |r - 1| rounds
|
||||
auto i { 0 };
|
||||
for (;;) {
|
||||
++i;
|
||||
if (i == 7)
|
||||
// clang-format off
|
||||
t0 = AESTables::Encode0[(s0 >> 24) ] ^
|
||||
AESTables::Encode1[(s1 >> 16) & 0xff] ^
|
||||
AESTables::Encode2[(s2 >> 8) & 0xff] ^
|
||||
AESTables::Encode3[(s3 ) & 0xff] ^ round_keys[4];
|
||||
t1 = AESTables::Encode0[(s1 >> 24) ] ^
|
||||
AESTables::Encode1[(s2 >> 16) & 0xff] ^
|
||||
AESTables::Encode2[(s3 >> 8) & 0xff] ^
|
||||
AESTables::Encode3[(s0 ) & 0xff] ^ round_keys[5];
|
||||
t2 = AESTables::Encode0[(s2 >> 24) ] ^
|
||||
AESTables::Encode1[(s3 >> 16) & 0xff] ^
|
||||
AESTables::Encode2[(s0 >> 8) & 0xff] ^
|
||||
AESTables::Encode3[(s1 ) & 0xff] ^ round_keys[6];
|
||||
t3 = AESTables::Encode0[(s3 >> 24) ] ^
|
||||
AESTables::Encode1[(s0 >> 16) & 0xff] ^
|
||||
AESTables::Encode2[(s1 >> 8) & 0xff] ^
|
||||
AESTables::Encode3[(s2 ) & 0xff] ^ round_keys[7];
|
||||
// clang-format on
|
||||
|
||||
round_keys += 8;
|
||||
--r;
|
||||
++i;
|
||||
if (r == 0)
|
||||
break;
|
||||
|
||||
temp = round_key[11];
|
||||
// clang-format off
|
||||
round_key[12] = round_key[4] ^
|
||||
(Tables::Encode2[(temp >> 24) ] & 0xff000000) ^
|
||||
(Tables::Encode3[(temp >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(Tables::Encode0[(temp >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(Tables::Encode1[(temp ) & 0xff] & 0x000000ff) ;
|
||||
s0 = AESTables::Encode0[(t0 >> 24) ] ^
|
||||
AESTables::Encode1[(t1 >> 16) & 0xff] ^
|
||||
AESTables::Encode2[(t2 >> 8) & 0xff] ^
|
||||
AESTables::Encode3[(t3 ) & 0xff] ^ round_keys[0];
|
||||
s1 = AESTables::Encode0[(t1 >> 24) ] ^
|
||||
AESTables::Encode1[(t2 >> 16) & 0xff] ^
|
||||
AESTables::Encode2[(t3 >> 8) & 0xff] ^
|
||||
AESTables::Encode3[(t0 ) & 0xff] ^ round_keys[1];
|
||||
s2 = AESTables::Encode0[(t2 >> 24) ] ^
|
||||
AESTables::Encode1[(t3 >> 16) & 0xff] ^
|
||||
AESTables::Encode2[(t0 >> 8) & 0xff] ^
|
||||
AESTables::Encode3[(t1 ) & 0xff] ^ round_keys[2];
|
||||
s3 = AESTables::Encode0[(t3 >> 24) ] ^
|
||||
AESTables::Encode1[(t0 >> 16) & 0xff] ^
|
||||
AESTables::Encode2[(t1 >> 8) & 0xff] ^
|
||||
AESTables::Encode3[(t2 ) & 0xff] ^ round_keys[3];
|
||||
// clang-format on
|
||||
round_key[13] = round_key[5] ^ round_key[12];
|
||||
round_key[14] = round_key[6] ^ round_key[13];
|
||||
round_key[15] = round_key[7] ^ round_key[14];
|
||||
|
||||
round_key += 8;
|
||||
}
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
void AESCipherKey::expand_decrypt_key(const StringView& user_key, size_t bits)
|
||||
{
|
||||
u32* round_key;
|
||||
|
||||
expand_encrypt_key(user_key, bits);
|
||||
|
||||
round_key = round_keys();
|
||||
|
||||
// reorder round keys
|
||||
for (size_t i = 0, j = 4 * rounds(); i < j; i += 4, j -= 4) {
|
||||
swap_keys(round_key, i, j);
|
||||
swap_keys(round_key, i + 1, j + 1);
|
||||
swap_keys(round_key, i + 2, j + 2);
|
||||
swap_keys(round_key, i + 3, j + 3);
|
||||
}
|
||||
|
||||
// apply inverse mix-column to middle rounds
|
||||
for (size_t i = 1; i < rounds(); ++i) {
|
||||
round_key += 4;
|
||||
// apply the last round and put the encrypted data into out
|
||||
// clang-format off
|
||||
round_key[0] =
|
||||
Tables::Decode0[Tables::Encode1[(round_key[0] >> 24) ] & 0xff] ^
|
||||
Tables::Decode1[Tables::Encode1[(round_key[0] >> 16) & 0xff] & 0xff] ^
|
||||
Tables::Decode2[Tables::Encode1[(round_key[0] >> 8) & 0xff] & 0xff] ^
|
||||
Tables::Decode3[Tables::Encode1[(round_key[0] ) & 0xff] & 0xff] ;
|
||||
round_key[1] =
|
||||
Tables::Decode0[Tables::Encode1[(round_key[1] >> 24) ] & 0xff] ^
|
||||
Tables::Decode1[Tables::Encode1[(round_key[1] >> 16) & 0xff] & 0xff] ^
|
||||
Tables::Decode2[Tables::Encode1[(round_key[1] >> 8) & 0xff] & 0xff] ^
|
||||
Tables::Decode3[Tables::Encode1[(round_key[1] ) & 0xff] & 0xff] ;
|
||||
round_key[2] =
|
||||
Tables::Decode0[Tables::Encode1[(round_key[2] >> 24) ] & 0xff] ^
|
||||
Tables::Decode1[Tables::Encode1[(round_key[2] >> 16) & 0xff] & 0xff] ^
|
||||
Tables::Decode2[Tables::Encode1[(round_key[2] >> 8) & 0xff] & 0xff] ^
|
||||
Tables::Decode3[Tables::Encode1[(round_key[2] ) & 0xff] & 0xff] ;
|
||||
round_key[3] =
|
||||
Tables::Decode0[Tables::Encode1[(round_key[3] >> 24) ] & 0xff] ^
|
||||
Tables::Decode1[Tables::Encode1[(round_key[3] >> 16) & 0xff] & 0xff] ^
|
||||
Tables::Decode2[Tables::Encode1[(round_key[3] >> 8) & 0xff] & 0xff] ^
|
||||
Tables::Decode3[Tables::Encode1[(round_key[3] ) & 0xff] & 0xff] ;
|
||||
// clang-format on
|
||||
}
|
||||
}
|
||||
|
||||
void AESCipher::encrypt_block(const AESCipherBlock& in, AESCipherBlock& out)
|
||||
{
|
||||
u32 s0, s1, s2, s3, t0, t1, t2, t3;
|
||||
size_t r { 0 };
|
||||
|
||||
const auto& dec_key = key();
|
||||
const auto* round_keys = dec_key.round_keys();
|
||||
|
||||
s0 = get_key(in.data().offset_pointer(0)) ^ round_keys[0];
|
||||
s1 = get_key(in.data().offset_pointer(4)) ^ round_keys[1];
|
||||
s2 = get_key(in.data().offset_pointer(8)) ^ round_keys[2];
|
||||
s3 = get_key(in.data().offset_pointer(12)) ^ round_keys[3];
|
||||
|
||||
r = dec_key.rounds() >> 1;
|
||||
|
||||
// apply the first |r - 1| rounds
|
||||
auto i { 0 };
|
||||
for (;;) {
|
||||
++i;
|
||||
// clang-format off
|
||||
t0 = Tables::Encode0[(s0 >> 24) ] ^
|
||||
Tables::Encode1[(s1 >> 16) & 0xff] ^
|
||||
Tables::Encode2[(s2 >> 8) & 0xff] ^
|
||||
Tables::Encode3[(s3 ) & 0xff] ^ round_keys[4];
|
||||
t1 = Tables::Encode0[(s1 >> 24) ] ^
|
||||
Tables::Encode1[(s2 >> 16) & 0xff] ^
|
||||
Tables::Encode2[(s3 >> 8) & 0xff] ^
|
||||
Tables::Encode3[(s0 ) & 0xff] ^ round_keys[5];
|
||||
t2 = Tables::Encode0[(s2 >> 24) ] ^
|
||||
Tables::Encode1[(s3 >> 16) & 0xff] ^
|
||||
Tables::Encode2[(s0 >> 8) & 0xff] ^
|
||||
Tables::Encode3[(s1 ) & 0xff] ^ round_keys[6];
|
||||
t3 = Tables::Encode0[(s3 >> 24) ] ^
|
||||
Tables::Encode1[(s0 >> 16) & 0xff] ^
|
||||
Tables::Encode2[(s1 >> 8) & 0xff] ^
|
||||
Tables::Encode3[(s2 ) & 0xff] ^ round_keys[7];
|
||||
// clang-format on
|
||||
|
||||
round_keys += 8;
|
||||
--r;
|
||||
++i;
|
||||
if (r == 0)
|
||||
break;
|
||||
|
||||
// clang-format off
|
||||
s0 = Tables::Encode0[(t0 >> 24) ] ^
|
||||
Tables::Encode1[(t1 >> 16) & 0xff] ^
|
||||
Tables::Encode2[(t2 >> 8) & 0xff] ^
|
||||
Tables::Encode3[(t3 ) & 0xff] ^ round_keys[0];
|
||||
s1 = Tables::Encode0[(t1 >> 24) ] ^
|
||||
Tables::Encode1[(t2 >> 16) & 0xff] ^
|
||||
Tables::Encode2[(t3 >> 8) & 0xff] ^
|
||||
Tables::Encode3[(t0 ) & 0xff] ^ round_keys[1];
|
||||
s2 = Tables::Encode0[(t2 >> 24) ] ^
|
||||
Tables::Encode1[(t3 >> 16) & 0xff] ^
|
||||
Tables::Encode2[(t0 >> 8) & 0xff] ^
|
||||
Tables::Encode3[(t1 ) & 0xff] ^ round_keys[2];
|
||||
s3 = Tables::Encode0[(t3 >> 24) ] ^
|
||||
Tables::Encode1[(t0 >> 16) & 0xff] ^
|
||||
Tables::Encode2[(t1 >> 8) & 0xff] ^
|
||||
Tables::Encode3[(t2 ) & 0xff] ^ round_keys[3];
|
||||
// clang-format on
|
||||
}
|
||||
|
||||
// apply the last round and put the encrypted data into out
|
||||
// clang-format off
|
||||
s0 = (Tables::Encode2[(t0 >> 24) ] & 0xff000000) ^
|
||||
(Tables::Encode3[(t1 >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(Tables::Encode0[(t2 >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(Tables::Encode1[(t3 ) & 0xff] & 0x000000ff) ^ round_keys[0];
|
||||
s0 = (AESTables::Encode2[(t0 >> 24) ] & 0xff000000) ^
|
||||
(AESTables::Encode3[(t1 >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(AESTables::Encode0[(t2 >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(AESTables::Encode1[(t3 ) & 0xff] & 0x000000ff) ^ round_keys[0];
|
||||
out.put(0, s0);
|
||||
|
||||
s1 = (Tables::Encode2[(t1 >> 24) ] & 0xff000000) ^
|
||||
(Tables::Encode3[(t2 >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(Tables::Encode0[(t3 >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(Tables::Encode1[(t0 ) & 0xff] & 0x000000ff) ^ round_keys[1];
|
||||
s1 = (AESTables::Encode2[(t1 >> 24) ] & 0xff000000) ^
|
||||
(AESTables::Encode3[(t2 >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(AESTables::Encode0[(t3 >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(AESTables::Encode1[(t0 ) & 0xff] & 0x000000ff) ^ round_keys[1];
|
||||
out.put(4, s1);
|
||||
|
||||
s2 = (Tables::Encode2[(t2 >> 24) ] & 0xff000000) ^
|
||||
(Tables::Encode3[(t3 >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(Tables::Encode0[(t0 >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(Tables::Encode1[(t1 ) & 0xff] & 0x000000ff) ^ round_keys[2];
|
||||
s2 = (AESTables::Encode2[(t2 >> 24) ] & 0xff000000) ^
|
||||
(AESTables::Encode3[(t3 >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(AESTables::Encode0[(t0 >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(AESTables::Encode1[(t1 ) & 0xff] & 0x000000ff) ^ round_keys[2];
|
||||
out.put(8, s2);
|
||||
|
||||
s3 = (Tables::Encode2[(t3 >> 24) ] & 0xff000000) ^
|
||||
(Tables::Encode3[(t0 >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(Tables::Encode0[(t1 >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(Tables::Encode1[(t2 ) & 0xff] & 0x000000ff) ^ round_keys[3];
|
||||
s3 = (AESTables::Encode2[(t3 >> 24) ] & 0xff000000) ^
|
||||
(AESTables::Encode3[(t0 >> 16) & 0xff] & 0x00ff0000) ^
|
||||
(AESTables::Encode0[(t1 >> 8) & 0xff] & 0x0000ff00) ^
|
||||
(AESTables::Encode1[(t2 ) & 0xff] & 0x000000ff) ^ round_keys[3];
|
||||
out.put(12, s3);
|
||||
// clang-format on
|
||||
}
|
||||
|
||||
void AESCipher::decrypt_block(const AESCipherBlock& in, AESCipherBlock& out)
|
||||
{
|
||||
|
||||
u32 s0, s1, s2, s3, t0, t1, t2, t3;
|
||||
size_t r { 0 };
|
||||
|
||||
const auto& dec_key = key();
|
||||
const auto* round_keys = dec_key.round_keys();
|
||||
|
||||
s0 = get_key(in.data().offset_pointer(0)) ^ round_keys[0];
|
||||
s1 = get_key(in.data().offset_pointer(4)) ^ round_keys[1];
|
||||
s2 = get_key(in.data().offset_pointer(8)) ^ round_keys[2];
|
||||
s3 = get_key(in.data().offset_pointer(12)) ^ round_keys[3];
|
||||
|
||||
r = dec_key.rounds() >> 1;
|
||||
|
||||
// apply the first |r - 1| rounds
|
||||
for (;;) {
|
||||
// clang-format off
|
||||
t0 = Tables::Decode0[(s0 >> 24) ] ^
|
||||
Tables::Decode1[(s3 >> 16) & 0xff] ^
|
||||
Tables::Decode2[(s2 >> 8) & 0xff] ^
|
||||
Tables::Decode3[(s1 ) & 0xff] ^ round_keys[4];
|
||||
t1 = Tables::Decode0[(s1 >> 24) ] ^
|
||||
Tables::Decode1[(s0 >> 16) & 0xff] ^
|
||||
Tables::Decode2[(s3 >> 8) & 0xff] ^
|
||||
Tables::Decode3[(s2 ) & 0xff] ^ round_keys[5];
|
||||
t2 = Tables::Decode0[(s2 >> 24) ] ^
|
||||
Tables::Decode1[(s1 >> 16) & 0xff] ^
|
||||
Tables::Decode2[(s0 >> 8) & 0xff] ^
|
||||
Tables::Decode3[(s3 ) & 0xff] ^ round_keys[6];
|
||||
t3 = Tables::Decode0[(s3 >> 24) ] ^
|
||||
Tables::Decode1[(s2 >> 16) & 0xff] ^
|
||||
Tables::Decode2[(s1 >> 8) & 0xff] ^
|
||||
Tables::Decode3[(s0 ) & 0xff] ^ round_keys[7];
|
||||
// clang-format on
|
||||
|
||||
round_keys += 8;
|
||||
--r;
|
||||
if (r == 0)
|
||||
break;
|
||||
|
||||
// clang-format off
|
||||
s0 = Tables::Decode0[(t0 >> 24) ] ^
|
||||
Tables::Decode1[(t3 >> 16) & 0xff] ^
|
||||
Tables::Decode2[(t2 >> 8) & 0xff] ^
|
||||
Tables::Decode3[(t1 ) & 0xff] ^ round_keys[0];
|
||||
s1 = Tables::Decode0[(t1 >> 24) ] ^
|
||||
Tables::Decode1[(t0 >> 16) & 0xff] ^
|
||||
Tables::Decode2[(t3 >> 8) & 0xff] ^
|
||||
Tables::Decode3[(t2 ) & 0xff] ^ round_keys[1];
|
||||
s2 = Tables::Decode0[(t2 >> 24) ] ^
|
||||
Tables::Decode1[(t1 >> 16) & 0xff] ^
|
||||
Tables::Decode2[(t0 >> 8) & 0xff] ^
|
||||
Tables::Decode3[(t3 ) & 0xff] ^ round_keys[2];
|
||||
s3 = Tables::Decode0[(t3 >> 24) ] ^
|
||||
Tables::Decode1[(t2 >> 16) & 0xff] ^
|
||||
Tables::Decode2[(t1 >> 8) & 0xff] ^
|
||||
Tables::Decode3[(t0 ) & 0xff] ^ round_keys[3];
|
||||
// clang-format on
|
||||
}
|
||||
|
||||
// apply the last round and put the decrypted data into out
|
||||
// clang-format off
|
||||
s0 = ((u32)Tables::Decode4[(t0 >> 24) ] << 24) ^
|
||||
((u32)Tables::Decode4[(t3 >> 16) & 0xff] << 16) ^
|
||||
((u32)Tables::Decode4[(t2 >> 8) & 0xff] << 8) ^
|
||||
((u32)Tables::Decode4[(t1 ) & 0xff] ) ^ round_keys[0];
|
||||
void AESCipher::decrypt_block(const AESCipherBlock& in, AESCipherBlock& out)
|
||||
{
|
||||
|
||||
u32 s0, s1, s2, s3, t0, t1, t2, t3;
|
||||
size_t r { 0 };
|
||||
|
||||
const auto& dec_key = key();
|
||||
const auto* round_keys = dec_key.round_keys();
|
||||
|
||||
s0 = get_key(in.data().offset_pointer(0)) ^ round_keys[0];
|
||||
s1 = get_key(in.data().offset_pointer(4)) ^ round_keys[1];
|
||||
s2 = get_key(in.data().offset_pointer(8)) ^ round_keys[2];
|
||||
s3 = get_key(in.data().offset_pointer(12)) ^ round_keys[3];
|
||||
|
||||
r = dec_key.rounds() >> 1;
|
||||
|
||||
// apply the first |r - 1| rounds
|
||||
for (;;) {
|
||||
// clang-format off
|
||||
t0 = AESTables::Decode0[(s0 >> 24) ] ^
|
||||
AESTables::Decode1[(s3 >> 16) & 0xff] ^
|
||||
AESTables::Decode2[(s2 >> 8) & 0xff] ^
|
||||
AESTables::Decode3[(s1 ) & 0xff] ^ round_keys[4];
|
||||
t1 = AESTables::Decode0[(s1 >> 24) ] ^
|
||||
AESTables::Decode1[(s0 >> 16) & 0xff] ^
|
||||
AESTables::Decode2[(s3 >> 8) & 0xff] ^
|
||||
AESTables::Decode3[(s2 ) & 0xff] ^ round_keys[5];
|
||||
t2 = AESTables::Decode0[(s2 >> 24) ] ^
|
||||
AESTables::Decode1[(s1 >> 16) & 0xff] ^
|
||||
AESTables::Decode2[(s0 >> 8) & 0xff] ^
|
||||
AESTables::Decode3[(s3 ) & 0xff] ^ round_keys[6];
|
||||
t3 = AESTables::Decode0[(s3 >> 24) ] ^
|
||||
AESTables::Decode1[(s2 >> 16) & 0xff] ^
|
||||
AESTables::Decode2[(s1 >> 8) & 0xff] ^
|
||||
AESTables::Decode3[(s0 ) & 0xff] ^ round_keys[7];
|
||||
// clang-format on
|
||||
|
||||
round_keys += 8;
|
||||
--r;
|
||||
if (r == 0)
|
||||
break;
|
||||
|
||||
// clang-format off
|
||||
s0 = AESTables::Decode0[(t0 >> 24) ] ^
|
||||
AESTables::Decode1[(t3 >> 16) & 0xff] ^
|
||||
AESTables::Decode2[(t2 >> 8) & 0xff] ^
|
||||
AESTables::Decode3[(t1 ) & 0xff] ^ round_keys[0];
|
||||
s1 = AESTables::Decode0[(t1 >> 24) ] ^
|
||||
AESTables::Decode1[(t0 >> 16) & 0xff] ^
|
||||
AESTables::Decode2[(t3 >> 8) & 0xff] ^
|
||||
AESTables::Decode3[(t2 ) & 0xff] ^ round_keys[1];
|
||||
s2 = AESTables::Decode0[(t2 >> 24) ] ^
|
||||
AESTables::Decode1[(t1 >> 16) & 0xff] ^
|
||||
AESTables::Decode2[(t0 >> 8) & 0xff] ^
|
||||
AESTables::Decode3[(t3 ) & 0xff] ^ round_keys[2];
|
||||
s3 = AESTables::Decode0[(t3 >> 24) ] ^
|
||||
AESTables::Decode1[(t2 >> 16) & 0xff] ^
|
||||
AESTables::Decode2[(t1 >> 8) & 0xff] ^
|
||||
AESTables::Decode3[(t0 ) & 0xff] ^ round_keys[3];
|
||||
// clang-format on
|
||||
}
|
||||
|
||||
// apply the last round and put the decrypted data into out
|
||||
// clang-format off
|
||||
s0 = ((u32)AESTables::Decode4[(t0 >> 24) ] << 24) ^
|
||||
((u32)AESTables::Decode4[(t3 >> 16) & 0xff] << 16) ^
|
||||
((u32)AESTables::Decode4[(t2 >> 8) & 0xff] << 8) ^
|
||||
((u32)AESTables::Decode4[(t1 ) & 0xff] ) ^ round_keys[0];
|
||||
out.put(0, s0);
|
||||
|
||||
s1 = ((u32)Tables::Decode4[(t1 >> 24) ] << 24) ^
|
||||
((u32)Tables::Decode4[(t0 >> 16) & 0xff] << 16) ^
|
||||
((u32)Tables::Decode4[(t3 >> 8) & 0xff] << 8) ^
|
||||
((u32)Tables::Decode4[(t2 ) & 0xff] ) ^ round_keys[1];
|
||||
s1 = ((u32)AESTables::Decode4[(t1 >> 24) ] << 24) ^
|
||||
((u32)AESTables::Decode4[(t0 >> 16) & 0xff] << 16) ^
|
||||
((u32)AESTables::Decode4[(t3 >> 8) & 0xff] << 8) ^
|
||||
((u32)AESTables::Decode4[(t2 ) & 0xff] ) ^ round_keys[1];
|
||||
out.put(4, s1);
|
||||
|
||||
s2 = ((u32)Tables::Decode4[(t2 >> 24) ] << 24) ^
|
||||
((u32)Tables::Decode4[(t1 >> 16) & 0xff] << 16) ^
|
||||
((u32)Tables::Decode4[(t0 >> 8) & 0xff] << 8) ^
|
||||
((u32)Tables::Decode4[(t3 ) & 0xff] ) ^ round_keys[2];
|
||||
s2 = ((u32)AESTables::Decode4[(t2 >> 24) ] << 24) ^
|
||||
((u32)AESTables::Decode4[(t1 >> 16) & 0xff] << 16) ^
|
||||
((u32)AESTables::Decode4[(t0 >> 8) & 0xff] << 8) ^
|
||||
((u32)AESTables::Decode4[(t3 ) & 0xff] ) ^ round_keys[2];
|
||||
out.put(8, s2);
|
||||
|
||||
s3 = ((u32)Tables::Decode4[(t3 >> 24) ] << 24) ^
|
||||
((u32)Tables::Decode4[(t2 >> 16) & 0xff] << 16) ^
|
||||
((u32)Tables::Decode4[(t1 >> 8) & 0xff] << 8) ^
|
||||
((u32)Tables::Decode4[(t0 ) & 0xff] ) ^ round_keys[3];
|
||||
s3 = ((u32)AESTables::Decode4[(t3 >> 24) ] << 24) ^
|
||||
((u32)AESTables::Decode4[(t2 >> 16) & 0xff] << 16) ^
|
||||
((u32)AESTables::Decode4[(t1 >> 8) & 0xff] << 8) ^
|
||||
((u32)AESTables::Decode4[(t0 ) & 0xff] ) ^ round_keys[3];
|
||||
out.put(12, s3);
|
||||
// clang-format on
|
||||
}
|
||||
// clang-format on
|
||||
}
|
||||
|
||||
void AESCipherBlock::overwrite(const ByteBuffer& buffer)
|
||||
{
|
||||
overwrite(buffer.data(), buffer.size());
|
||||
}
|
||||
void AESCipherBlock::overwrite(const ByteBuffer& buffer)
|
||||
{
|
||||
overwrite(buffer.data(), buffer.size());
|
||||
}
|
||||
|
||||
void AESCipherBlock::overwrite(const u8* data, size_t length)
|
||||
{
|
||||
ASSERT(length <= m_data.size());
|
||||
m_data.overwrite(0, data, length);
|
||||
if (length < m_data.size()) {
|
||||
switch (padding_mode()) {
|
||||
case PaddingMode::Null:
|
||||
// fill with zeros
|
||||
__builtin_memset(m_data.data() + length, 0, m_data.size() - length);
|
||||
break;
|
||||
case PaddingMode::CMS:
|
||||
// fill with the length of the padding bytes
|
||||
__builtin_memset(m_data.data() + length, m_data.size() - length, m_data.size() - length);
|
||||
break;
|
||||
default:
|
||||
// FIXME: We should handle the rest of the common padding modes
|
||||
ASSERT_NOT_REACHED();
|
||||
void AESCipherBlock::overwrite(const u8* data, size_t length)
|
||||
{
|
||||
ASSERT(length <= m_data.size());
|
||||
m_data.overwrite(0, data, length);
|
||||
if (length < m_data.size()) {
|
||||
switch (padding_mode()) {
|
||||
case PaddingMode::Null:
|
||||
// fill with zeros
|
||||
__builtin_memset(m_data.data() + length, 0, m_data.size() - length);
|
||||
break;
|
||||
case PaddingMode::CMS:
|
||||
// fill with the length of the padding bytes
|
||||
__builtin_memset(m_data.data() + length, m_data.size() - length, m_data.size() - length);
|
||||
break;
|
||||
default:
|
||||
// FIXME: We should handle the rest of the common padding modes
|
||||
ASSERT_NOT_REACHED();
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue