e86420efb2
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> (cherry picked from commit c8c36413ca8ccbf7a0afe71247fc4617ee2dfcfe git://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master) Change-Id: I93e96e1ef40de7071af212146b8ad3bf45297c1d Signed-off-by: Eric Biggers <ebiggers@google.com>
62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Common values for the Speck algorithm
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*/
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#ifndef _CRYPTO_SPECK_H
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#define _CRYPTO_SPECK_H
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#include <linux/types.h>
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/* Speck128 */
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#define SPECK128_BLOCK_SIZE 16
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#define SPECK128_128_KEY_SIZE 16
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#define SPECK128_128_NROUNDS 32
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#define SPECK128_192_KEY_SIZE 24
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#define SPECK128_192_NROUNDS 33
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#define SPECK128_256_KEY_SIZE 32
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#define SPECK128_256_NROUNDS 34
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struct speck128_tfm_ctx {
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u64 round_keys[SPECK128_256_NROUNDS];
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int nrounds;
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};
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void crypto_speck128_encrypt(const struct speck128_tfm_ctx *ctx,
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u8 *out, const u8 *in);
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void crypto_speck128_decrypt(const struct speck128_tfm_ctx *ctx,
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u8 *out, const u8 *in);
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int crypto_speck128_setkey(struct speck128_tfm_ctx *ctx, const u8 *key,
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unsigned int keysize);
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/* Speck64 */
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#define SPECK64_BLOCK_SIZE 8
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#define SPECK64_96_KEY_SIZE 12
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#define SPECK64_96_NROUNDS 26
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#define SPECK64_128_KEY_SIZE 16
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#define SPECK64_128_NROUNDS 27
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struct speck64_tfm_ctx {
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u32 round_keys[SPECK64_128_NROUNDS];
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int nrounds;
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};
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void crypto_speck64_encrypt(const struct speck64_tfm_ctx *ctx,
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u8 *out, const u8 *in);
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void crypto_speck64_decrypt(const struct speck64_tfm_ctx *ctx,
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u8 *out, const u8 *in);
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int crypto_speck64_setkey(struct speck64_tfm_ctx *ctx, const u8 *key,
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unsigned int keysize);
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#endif /* _CRYPTO_SPECK_H */
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