diff options
author | Eric Biggers <ebiggers@google.com> | 2018-02-14 10:42:20 -0800 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-02-22 22:16:54 +0800 |
commit | c8c36413ca8ccbf7a0afe71247fc4617ee2dfcfe (patch) | |
tree | 5d93fa8434763f697ddde4f90833f0ab563ea5f2 /include/crypto/speck.h | |
parent | da7a0ab5b4babbe5d7a46f852582be06a00a28f0 (diff) | |
download | linux-c8c36413ca8ccbf7a0afe71247fc4617ee2dfcfe.tar.bz2 |
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>
Diffstat (limited to 'include/crypto/speck.h')
-rw-r--r-- | include/crypto/speck.h | 62 |
1 files changed, 62 insertions, 0 deletions
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 <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 */ |