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Diffstat (limited to '')
-rw-r--r-- | src/core/crypto/ctr_encryption_layer.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/core/crypto/ctr_encryption_layer.h b/src/core/crypto/ctr_encryption_layer.h new file mode 100644 index 000000000..fe53e714b --- /dev/null +++ b/src/core/crypto/ctr_encryption_layer.h @@ -0,0 +1,31 @@ +// Copyright 2018 yuzu emulator team +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include "aes_util.h" +#include "encryption_layer.h" +#include "key_manager.h" + +namespace Crypto { + +// Sits on top of a VirtualFile and provides CTR-mode AES decription. +struct CTREncryptionLayer : public EncryptionLayer { + CTREncryptionLayer(FileSys::VirtualFile base, Key128 key, size_t base_offset); + + size_t Read(u8* data, size_t length, size_t offset) const override; + + void SetIV(std::vector<u8> iv); + +private: + size_t base_offset; + + // Must be mutable as operations modify cipher contexts. + mutable AESCipher<Key128> cipher; + mutable std::vector<u8> iv; + + void UpdateIV(size_t offset) const; +}; + +} // namespace Crypto |