linux/include/crypto/speck.h
Eric Biggers c8c36413ca crypto: speck - export common helpers
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>
2018-02-22 22:16:54 +08:00

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 */