c8c36413ca
Export the Speck constants and transform context and the ->setkey(), ->encrypt(), and ->decrypt() functions so that they can be reused by the ARM NEON implementation of Speck-XTS. The generic key expansion code will be reused because it is not performance-critical and is not vectorizable, while the generic encryption and decryption functions are needed as fallbacks and for the XTS tweak encryption. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Common values for the Speck algorithm
|
|
*/
|
|
|
|
#ifndef _CRYPTO_SPECK_H
|
|
#define _CRYPTO_SPECK_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
/* Speck128 */
|
|
|
|
#define SPECK128_BLOCK_SIZE 16
|
|
|
|
#define SPECK128_128_KEY_SIZE 16
|
|
#define SPECK128_128_NROUNDS 32
|
|
|
|
#define SPECK128_192_KEY_SIZE 24
|
|
#define SPECK128_192_NROUNDS 33
|
|
|
|
#define SPECK128_256_KEY_SIZE 32
|
|
#define SPECK128_256_NROUNDS 34
|
|
|
|
struct speck128_tfm_ctx {
|
|
u64 round_keys[SPECK128_256_NROUNDS];
|
|
int nrounds;
|
|
};
|
|
|
|
void crypto_speck128_encrypt(const struct speck128_tfm_ctx *ctx,
|
|
u8 *out, const u8 *in);
|
|
|
|
void crypto_speck128_decrypt(const struct speck128_tfm_ctx *ctx,
|
|
u8 *out, const u8 *in);
|
|
|
|
int crypto_speck128_setkey(struct speck128_tfm_ctx *ctx, const u8 *key,
|
|
unsigned int keysize);
|
|
|
|
/* Speck64 */
|
|
|
|
#define SPECK64_BLOCK_SIZE 8
|
|
|
|
#define SPECK64_96_KEY_SIZE 12
|
|
#define SPECK64_96_NROUNDS 26
|
|
|
|
#define SPECK64_128_KEY_SIZE 16
|
|
#define SPECK64_128_NROUNDS 27
|
|
|
|
struct speck64_tfm_ctx {
|
|
u32 round_keys[SPECK64_128_NROUNDS];
|
|
int nrounds;
|
|
};
|
|
|
|
void crypto_speck64_encrypt(const struct speck64_tfm_ctx *ctx,
|
|
u8 *out, const u8 *in);
|
|
|
|
void crypto_speck64_decrypt(const struct speck64_tfm_ctx *ctx,
|
|
u8 *out, const u8 *in);
|
|
|
|
int crypto_speck64_setkey(struct speck64_tfm_ctx *ctx, const u8 *key,
|
|
unsigned int keysize);
|
|
|
|
#endif /* _CRYPTO_SPECK_H */
|