include/crypto/morus640_glue.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * The MORUS-640 Authenticated-Encryption Algorithm
   4  *   Common glue skeleton -- header file
   5  *
   6  * Copyright (c) 2016-2018 Ondrej Mosnacek <omosnacek@gmail.com>
   7  * Copyright (C) 2017-2018 Red Hat, Inc. All rights reserved.
   8  */
   9
  10 #ifndef _CRYPTO_MORUS640_GLUE_H
  11 #define _CRYPTO_MORUS640_GLUE_H
  12
  13 #include <linux/module.h>
  14 #include <linux/types.h>
  15 #include <crypto/algapi.h>
  16 #include <crypto/aead.h>
  17 #include <crypto/morus_common.h>
  18
  19 #define MORUS640_WORD_SIZE 4
  20 #define MORUS640_BLOCK_SIZE (MORUS_BLOCK_WORDS * MORUS640_WORD_SIZE)
  21
  22 struct morus640_block {
  23         u8 bytes[MORUS640_BLOCK_SIZE];
  24 };
  25
  26 struct morus640_glue_ops {
  27         void (*init)(void *state, const void *key, const void *iv);
  28         void (*ad)(void *state, const void *data, unsigned int length);
  29         void (*enc)(void *state, const void *src, void *dst, unsigned int length);
  30         void (*dec)(void *state, const void *src, void *dst, unsigned int length);
  31         void (*enc_tail)(void *state, const void *src, void *dst, unsigned int length);
  32         void (*dec_tail)(void *state, const void *src, void *dst, unsigned int length);
  33         void (*final)(void *state, void *tag_xor, u64 assoclen, u64 cryptlen);
  34 };
  35
  36 struct morus640_ctx {
  37         const struct morus640_glue_ops *ops;
  38         struct morus640_block key;
  39 };
  40
  41 void crypto_morus640_glue_init_ops(struct crypto_aead *aead,
  42                                    const struct morus640_glue_ops *ops);
  43 int crypto_morus640_glue_setkey(struct crypto_aead *aead, const u8 *key,
  44                                 unsigned int keylen);
  45 int crypto_morus640_glue_setauthsize(struct crypto_aead *tfm,
  46                                      unsigned int authsize);
  47 int crypto_morus640_glue_encrypt(struct aead_request *req);
  48 int crypto_morus640_glue_decrypt(struct aead_request *req);
  49
  50 #define MORUS640_DECLARE_ALG(id, driver_name, priority) \
  51         static const struct morus640_glue_ops crypto_morus640_##id##_ops = {\
  52                 .init = crypto_morus640_##id##_init, \
  53                 .ad = crypto_morus640_##id##_ad, \
  54                 .enc = crypto_morus640_##id##_enc, \
  55                 .enc_tail = crypto_morus640_##id##_enc_tail, \
  56                 .dec = crypto_morus640_##id##_dec, \
  57                 .dec_tail = crypto_morus640_##id##_dec_tail, \
  58                 .final = crypto_morus640_##id##_final, \
  59         }; \
  60         \
  61         static int crypto_morus640_##id##_init_tfm(struct crypto_aead *tfm) \
  62         { \
  63                 crypto_morus640_glue_init_ops(tfm, &crypto_morus640_##id##_ops); \
  64                 return 0; \
  65         } \
  66         \
  67         static void crypto_morus640_##id##_exit_tfm(struct crypto_aead *tfm) \
  68         { \
  69         } \
  70         \
  71         static struct aead_alg crypto_morus640_##id##_alg = {\
  72                 .setkey = crypto_morus640_glue_setkey, \
  73                 .setauthsize = crypto_morus640_glue_setauthsize, \
  74                 .encrypt = crypto_morus640_glue_encrypt, \
  75                 .decrypt = crypto_morus640_glue_decrypt, \
  76                 .init = crypto_morus640_##id##_init_tfm, \
  77                 .exit = crypto_morus640_##id##_exit_tfm, \
  78                 \
  79                 .ivsize = MORUS_NONCE_SIZE, \
  80                 .maxauthsize = MORUS_MAX_AUTH_SIZE, \
  81                 .chunksize = MORUS640_BLOCK_SIZE, \
  82                 \
  83                 .base = { \
  84                         .cra_flags = CRYPTO_ALG_INTERNAL, \
  85                         .cra_blocksize = 1, \
  86                         .cra_ctxsize = sizeof(struct morus640_ctx), \
  87                         .cra_alignmask = 0, \
  88                         .cra_priority = priority, \
  89                         \
  90                         .cra_name = "__morus640", \
  91                         .cra_driver_name = "__"driver_name, \
  92                         \
  93                         .cra_module = THIS_MODULE, \
  94                 } \
  95         }
  96
  97 #endif /* _CRYPTO_MORUS640_GLUE_H */