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crypto: add aes (ecb, ctr, xts)

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Michael Scire 2020-04-05 23:25:28 -07:00
parent 8d1ada2a1b
commit e04679f05a
19 changed files with 3191 additions and 1 deletions
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118
libraries/libvapours/source/crypto/impl/crypto_aes_impl.arch.arm64.cpp Normal file
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/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <vapours.hpp>
namespace ams::crypto::impl {
#ifdef ATMOSPHERE_IS_STRATOSPHERE
namespace {
constexpr bool IsSupportedKeySize(size_t size) {
return size == 16 || size == 24 || size == 32;
}
}
template<size_t KeySize>
AesImpl<KeySize>::~AesImpl() {
ClearMemory(this, sizeof(*this));
}
template<size_t KeySize>
void AesImpl<KeySize>::Initialize(const void *key, size_t key_size, bool is_encrypt) {
static_assert(IsSupportedKeySize(KeySize));
AMS_ASSERT(key_size == KeySize);
if constexpr (KeySize == 16) {
/* Aes 128. */
static_assert(sizeof(this->round_keys) == sizeof(::Aes128Context));
aes128ContextCreate(reinterpret_cast<Aes128Context *>(this->round_keys), key, is_encrypt);
} else if constexpr (KeySize == 24) {
/* Aes 192. */
static_assert(sizeof(this->round_keys) == sizeof(::Aes192Context));
aes192ContextCreate(reinterpret_cast<Aes192Context *>(this->round_keys), key, is_encrypt);
} else if constexpr (KeySize == 32) {
/* Aes 256. */
static_assert(sizeof(this->round_keys) == sizeof(::Aes256Context));
aes256ContextCreate(reinterpret_cast<Aes256Context *>(this->round_keys), key, is_encrypt);
} else {
/* Invalid key size. */
static_assert(!std::is_same<AesImpl<KeySize>, AesImpl<KeySize>>::value);
}
}
template<size_t KeySize>
void AesImpl<KeySize>::EncryptBlock(void *dst, size_t dst_size, const void *src, size_t src_size) const {
static_assert(IsSupportedKeySize(KeySize));
AMS_ASSERT(src_size >= BlockSize);
AMS_ASSERT(dst_size >= BlockSize);
if constexpr (KeySize == 16) {
/* Aes 128. */
static_assert(sizeof(this->round_keys) == sizeof(::Aes128Context));
aes128EncryptBlock(reinterpret_cast<const Aes128Context *>(this->round_keys), dst, src);
} else if constexpr (KeySize == 24) {
/* Aes 192. */
static_assert(sizeof(this->round_keys) == sizeof(::Aes192Context));
aes192EncryptBlock(reinterpret_cast<const Aes192Context *>(this->round_keys), dst, src);
} else if constexpr (KeySize == 32) {
/* Aes 256. */
static_assert(sizeof(this->round_keys) == sizeof(::Aes256Context));
aes256EncryptBlock(reinterpret_cast<const Aes256Context *>(this->round_keys), dst, src);
} else {
/* Invalid key size. */
static_assert(!std::is_same<AesImpl<KeySize>, AesImpl<KeySize>>::value);
}
}
template<size_t KeySize>
void AesImpl<KeySize>::DecryptBlock(void *dst, size_t dst_size, const void *src, size_t src_size) const {
static_assert(IsSupportedKeySize(KeySize));
AMS_ASSERT(src_size >= BlockSize);
AMS_ASSERT(dst_size >= BlockSize);
if constexpr (KeySize == 16) {
/* Aes 128. */
static_assert(sizeof(this->round_keys) == sizeof(::Aes128Context));
aes128DecryptBlock(reinterpret_cast<const Aes128Context *>(this->round_keys), dst, src);
} else if constexpr (KeySize == 24) {
/* Aes 192. */
static_assert(sizeof(this->round_keys) == sizeof(::Aes192Context));
aes192DecryptBlock(reinterpret_cast<const Aes192Context *>(this->round_keys), dst, src);
} else if constexpr (KeySize == 32) {
/* Aes 256. */
static_assert(sizeof(this->round_keys) == sizeof(::Aes256Context));
aes256DecryptBlock(reinterpret_cast<const Aes256Context *>(this->round_keys), dst, src);
} else {
/* Invalid key size. */
static_assert(!std::is_same<AesImpl<KeySize>, AesImpl<KeySize>>::value);
}
}
/* Explicitly instantiate the three supported key sizes. */
template class AesImpl<16>;
template class AesImpl<24>;
template class AesImpl<32>;
#else
/* TODO: Non-EL0 implementation. */
#endif
}