mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-21 15:08:12 +00:00
226 lines
7.7 KiB
C
226 lines
7.7 KiB
C
/*
|
|
---------------------------------------------------------------------------
|
|
Copyright (c) 1998-2013, Brian Gladman, Worcester, UK. All rights reserved.
|
|
|
|
The redistribution and use of this software (with or without changes)
|
|
is allowed without the payment of fees or royalties provided that:
|
|
|
|
source code distributions include the above copyright notice, this
|
|
list of conditions and the following disclaimer;
|
|
|
|
binary distributions include the above copyright notice, this list
|
|
of conditions and the following disclaimer in their documentation.
|
|
|
|
This software is provided 'as is' with no explicit or implied warranties
|
|
in respect of its operation, including, but not limited to, correctness
|
|
and fitness for purpose.
|
|
---------------------------------------------------------------------------
|
|
Issue Date: 02/08/2018
|
|
|
|
This file contains the definitions required to use AES in C. See aesopt.h
|
|
for optimisation details.
|
|
*/
|
|
|
|
#ifndef _AES_H
|
|
#define _AES_H
|
|
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
|
|
#define INT_RETURN int
|
|
#define ALIGN_OFFSET(x,n) (((intptr_t)(x)) & ((n) - 1))
|
|
#define ALIGN_FLOOR(x,n) ((uint8_t*)(x) - ( ((intptr_t)(x)) & ((n) - 1)))
|
|
#define ALIGN_CEIL(x,n) ((uint8_t*)(x) + (-((intptr_t)(x)) & ((n) - 1)))
|
|
|
|
#if defined(__cplusplus)
|
|
extern "C"
|
|
{
|
|
#endif
|
|
|
|
// #define AES_128 /* if a fast 128 bit key scheduler is needed */
|
|
// #define AES_192 /* if a fast 192 bit key scheduler is needed */
|
|
#define AES_256 /* if a fast 256 bit key scheduler is needed */
|
|
// #define AES_VAR /* if variable key size scheduler is needed */
|
|
#if 1
|
|
# define AES_MODES /* if support is needed for modes in the C code */
|
|
#endif /* (these will use AES_NI if it is present) */
|
|
#if 0 /* add this to make direct calls to the AES_NI */
|
|
# /* implemented CBC and CTR modes available */
|
|
# define ADD_AESNI_MODE_CALLS
|
|
#endif
|
|
|
|
/* The following must also be set in assembler files if being used */
|
|
|
|
#define AES_ENCRYPT /* if support for encryption is needed */
|
|
#define AES_DECRYPT /* if support for decryption is needed */
|
|
|
|
#define AES_BLOCK_SIZE_P2 4 /* AES block size as a power of 2 */
|
|
#define AES_BLOCK_SIZE (1 << AES_BLOCK_SIZE_P2) /* AES block size */
|
|
#define N_COLS 4 /* the number of columns in the state */
|
|
|
|
/* The key schedule length is 11, 13 or 15 16-byte blocks for 128, */
|
|
/* 192 or 256-bit keys respectively. That is 176, 208 or 240 bytes */
|
|
/* or 44, 52 or 60 32-bit words. */
|
|
|
|
#if defined( AES_VAR ) || defined( AES_256 )
|
|
#define KS_LENGTH 60
|
|
#elif defined( AES_192 )
|
|
#define KS_LENGTH 52
|
|
#else
|
|
#define KS_LENGTH 44
|
|
#endif
|
|
|
|
#define AES_RETURN INT_RETURN
|
|
|
|
/* the character array 'inf' in the following structures is used */
|
|
/* to hold AES context information. This AES code uses cx->inf.b[0] */
|
|
/* to hold the number of rounds multiplied by 16. The other three */
|
|
/* elements can be used by code that implements additional modes */
|
|
|
|
typedef union
|
|
{ uint32_t l;
|
|
uint8_t b[4];
|
|
} aes_inf;
|
|
|
|
#ifdef _MSC_VER
|
|
# pragma warning( disable : 4324 )
|
|
#endif
|
|
|
|
#if defined(_MSC_VER) && defined(_WIN64)
|
|
#define ALIGNED_(x) __declspec(align(x))
|
|
#elif defined(__GNUC__) && defined(__x86_64__)
|
|
#define ALIGNED_(x) __attribute__ ((aligned(x)))
|
|
#else
|
|
#define ALIGNED_(x)
|
|
#endif
|
|
|
|
typedef struct ALIGNED_(16)
|
|
{ uint32_t ks[KS_LENGTH];
|
|
aes_inf inf;
|
|
} aes_encrypt_ctx;
|
|
|
|
typedef struct ALIGNED_(16)
|
|
{ uint32_t ks[KS_LENGTH];
|
|
aes_inf inf;
|
|
} aes_decrypt_ctx;
|
|
|
|
#ifdef _MSC_VER
|
|
# pragma warning( default : 4324 )
|
|
#endif
|
|
|
|
/* This routine must be called before first use if non-static */
|
|
/* tables are being used */
|
|
|
|
AES_RETURN aes_init(void);
|
|
|
|
/* Key lengths in the range 16 <= key_len <= 32 are given in bytes, */
|
|
/* those in the range 128 <= key_len <= 256 are given in bits */
|
|
|
|
#if defined( AES_ENCRYPT )
|
|
|
|
#if defined( AES_128 ) || defined( AES_VAR)
|
|
AES_RETURN aes_encrypt_key128(const unsigned char *key, aes_encrypt_ctx cx[1]);
|
|
#endif
|
|
|
|
#if defined( AES_192 ) || defined( AES_VAR)
|
|
AES_RETURN aes_encrypt_key192(const unsigned char *key, aes_encrypt_ctx cx[1]);
|
|
#endif
|
|
|
|
#if defined( AES_256 ) || defined( AES_VAR)
|
|
AES_RETURN aes_encrypt_key256(const unsigned char *key, aes_encrypt_ctx cx[1]);
|
|
#endif
|
|
|
|
#if defined( AES_VAR )
|
|
AES_RETURN aes_encrypt_key(const unsigned char *key, int key_len, aes_encrypt_ctx cx[1]);
|
|
#endif
|
|
|
|
AES_RETURN aes_encrypt(const unsigned char *in, unsigned char *out, const aes_encrypt_ctx cx[1]);
|
|
|
|
#endif
|
|
|
|
#if defined( AES_DECRYPT )
|
|
|
|
#if defined( AES_128 ) || defined( AES_VAR)
|
|
AES_RETURN aes_decrypt_key128(const unsigned char *key, aes_decrypt_ctx cx[1]);
|
|
#endif
|
|
|
|
#if defined( AES_192 ) || defined( AES_VAR)
|
|
AES_RETURN aes_decrypt_key192(const unsigned char *key, aes_decrypt_ctx cx[1]);
|
|
#endif
|
|
|
|
#if defined( AES_256 ) || defined( AES_VAR)
|
|
AES_RETURN aes_decrypt_key256(const unsigned char *key, aes_decrypt_ctx cx[1]);
|
|
#endif
|
|
|
|
#if defined( AES_VAR )
|
|
AES_RETURN aes_decrypt_key(const unsigned char *key, int key_len, aes_decrypt_ctx cx[1]);
|
|
#endif
|
|
|
|
AES_RETURN aes_decrypt(const unsigned char *in, unsigned char *out, const aes_decrypt_ctx cx[1]);
|
|
|
|
#endif
|
|
|
|
#if defined( AES_MODES )
|
|
|
|
/* Multiple calls to the following subroutines for multiple block */
|
|
/* ECB, CBC, CFB, OFB and CTR mode encryption can be used to handle */
|
|
/* long messages incrementally provided that the context AND the iv */
|
|
/* are preserved between all such calls. For the ECB and CBC modes */
|
|
/* each individual call within a series of incremental calls must */
|
|
/* process only full blocks (i.e. len must be a multiple of 16) but */
|
|
/* the CFB, OFB and CTR mode calls can handle multiple incremental */
|
|
/* calls of any length. Each mode is reset when a new AES key is */
|
|
/* set but ECB needs no reset and CBC can be reset without setting */
|
|
/* a new key by setting a new IV value. To reset CFB, OFB and CTR */
|
|
/* without setting the key, aes_mode_reset() must be called and the */
|
|
/* IV must be set. NOTE: All these calls update the IV on exit so */
|
|
/* this has to be reset if a new operation with the same IV as the */
|
|
/* previous one is required (or decryption follows encryption with */
|
|
/* the same IV array). */
|
|
|
|
AES_RETURN aes_test_alignment_detection(unsigned int n);
|
|
|
|
AES_RETURN aes_ecb_encrypt(const unsigned char *ibuf, unsigned char *obuf,
|
|
int len, const aes_encrypt_ctx cx[1]);
|
|
|
|
AES_RETURN aes_ecb_decrypt(const unsigned char *ibuf, unsigned char *obuf,
|
|
int len, const aes_decrypt_ctx cx[1]);
|
|
|
|
AES_RETURN aes_cbc_encrypt(const unsigned char *ibuf, unsigned char *obuf,
|
|
int len, unsigned char *iv, const aes_encrypt_ctx cx[1]);
|
|
|
|
AES_RETURN aes_cbc_decrypt(const unsigned char *ibuf, unsigned char *obuf,
|
|
int len, unsigned char *iv, const aes_decrypt_ctx cx[1]);
|
|
|
|
AES_RETURN aes_mode_reset(aes_encrypt_ctx cx[1]);
|
|
|
|
AES_RETURN aes_cfb_encrypt(const unsigned char *ibuf, unsigned char *obuf,
|
|
int len, unsigned char *iv, aes_encrypt_ctx cx[1]);
|
|
|
|
AES_RETURN aes_cfb_decrypt(const unsigned char *ibuf, unsigned char *obuf,
|
|
int len, unsigned char *iv, aes_encrypt_ctx cx[1]);
|
|
|
|
#define aes_ofb_encrypt aes_ofb_crypt
|
|
#define aes_ofb_decrypt aes_ofb_crypt
|
|
|
|
AES_RETURN aes_ofb_crypt(const unsigned char *ibuf, unsigned char *obuf,
|
|
int len, unsigned char *iv, aes_encrypt_ctx cx[1]);
|
|
|
|
typedef void cbuf_inc(unsigned char *cbuf);
|
|
|
|
#define aes_ctr_encrypt aes_ctr_crypt
|
|
#define aes_ctr_decrypt aes_ctr_crypt
|
|
|
|
AES_RETURN aes_ctr_crypt(const unsigned char *ibuf, unsigned char *obuf,
|
|
int len, unsigned char *cbuf, cbuf_inc ctr_inc, aes_encrypt_ctx cx[1]);
|
|
|
|
void aes_ctr_cbuf_inc(unsigned char *cbuf);
|
|
|
|
#endif
|
|
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif
|