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75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
/**
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* @file aes.h
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* @brief Hardware accelerated AES-ECB implementation.
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* @copyright libnx Authors
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*/
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#pragma once
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#include "../types.h"
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#ifndef AES_BLOCK_SIZE
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#define AES_BLOCK_SIZE 0x10
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#endif
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#ifndef AES_128_KEY_SIZE
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#define AES_128_KEY_SIZE 0x10
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#endif
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#ifndef AES_128_U32_PER_KEY
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#define AES_128_U32_PER_KEY (AES_128_KEY_SIZE / sizeof(u32))
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#endif
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#ifndef AES_128_NUM_ROUNDS
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#define AES_128_NUM_ROUNDS 10
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#endif
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#ifndef AES_192_KEY_SIZE
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#define AES_192_KEY_SIZE 0x18
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#endif
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#ifndef AES_192_U32_PER_KEY
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#define AES_192_U32_PER_KEY (AES_192_KEY_SIZE / sizeof(u32))
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#endif
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#ifndef AES_192_NUM_ROUNDS
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#define AES_192_NUM_ROUNDS 12
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#endif
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#ifndef AES_256_KEY_SIZE
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#define AES_256_KEY_SIZE 0x20
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#endif
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#ifndef AES_256_U32_PER_KEY
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#define AES_256_U32_PER_KEY (AES_256_KEY_SIZE / sizeof(u32))
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#endif
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#ifndef AES_256_NUM_ROUNDS
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#define AES_256_NUM_ROUNDS 14
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#endif
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/// Context for AES-128 operations.
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typedef struct {
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u8 round_keys[AES_128_NUM_ROUNDS+1][AES_BLOCK_SIZE];
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} Aes128Context;
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/// Context for AES-192 operations.
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typedef struct {
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u8 round_keys[AES_192_NUM_ROUNDS+1][AES_BLOCK_SIZE];
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} Aes192Context;
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/// Context for AES-256 operations.
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typedef struct {
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u8 round_keys[AES_256_NUM_ROUNDS+1][AES_BLOCK_SIZE];
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} Aes256Context;
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/// Initialize a 128-bit AES context.
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void aes128ContextCreate(Aes128Context *out, const void *key, bool is_encryptor);
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/// Encrypt using an AES context (Requires is_encryptor when initializing)
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void aes128EncryptBlock(const Aes128Context *ctx, void *dst, const void *src);
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/// Decrypt using an AES context (Requires !is_encryptor when initializing)
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void aes128DecryptBlock(const Aes128Context *ctx, void *dst, const void *src);
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/// Initialize a 192-bit AES context.
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void aes192ContextCreate(Aes192Context *out, const void *key, bool is_encryptor);
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/// Encrypt using an AES context (Requires is_encryptor when initializing)
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void aes192EncryptBlock(const Aes192Context *ctx, void *dst, const void *src);
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/// Decrypt using an AES context (Requires !is_encryptor when initializing)
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void aes192DecryptBlock(const Aes192Context *ctx, void *dst, const void *src);
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/// Initialize a 256-bit AES context.
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void aes256ContextCreate(Aes256Context *out, const void *key, bool is_encryptor);
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/// Encrypt using an AES context (Requires is_encryptor when initializing)
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void aes256EncryptBlock(const Aes256Context *ctx, void *dst, const void *src);
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/// Decrypt using an AES context (Requires !is_encryptor when initializing)
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void aes256DecryptBlock(const Aes256Context *ctx, void *dst, const void *src);
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