From c8c36413ca8ccbf7a0afe71247fc4617ee2dfcfe Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Wed, 14 Feb 2018 10:42:20 -0800 Subject: 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 Signed-off-by: Herbert Xu --- include/crypto/speck.h | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 include/crypto/speck.h (limited to 'include/crypto') diff --git a/include/crypto/speck.h b/include/crypto/speck.h new file mode 100644 index 000000000000..73cfc952d405 --- /dev/null +++ b/include/crypto/speck.h @@ -0,0 +1,62 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Common values for the Speck algorithm + */ + +#ifndef _CRYPTO_SPECK_H +#define _CRYPTO_SPECK_H + +#include + +/* 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 */ -- cgit v1.2.3