drivers/crypto/qce/sha.h

   1 /*
   2  * Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 and
   6  * only version 2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #ifndef _SHA_H_
  15 #define _SHA_H_
  16
  17 #include <crypto/scatterwalk.h>
  18 #include <crypto/sha.h>
  19
  20 #include "common.h"
  21 #include "core.h"
  22
  23 #define QCE_SHA_MAX_BLOCKSIZE           SHA256_BLOCK_SIZE
  24 #define QCE_SHA_MAX_DIGESTSIZE          SHA256_DIGEST_SIZE
  25
  26 struct qce_sha_ctx {
  27         u8 authkey[QCE_SHA_MAX_BLOCKSIZE];
  28 };
  29
  30 /**
  31  * struct qce_sha_reqctx - holds private ahash objects per request
  32  * @buf: used during update, import and export
  33  * @tmpbuf: buffer for internal use
  34  * @digest: calculated digest buffer
  35  * @buflen: length of the buffer
  36  * @flags: operation flags
  37  * @src_orig: original request sg list
  38  * @nbytes_orig: original request number of bytes
  39  * @src_nents: source number of entries
  40  * @byte_count: byte count
  41  * @count: save count in states during update, import and export
  42  * @first_blk: is it the first block
  43  * @last_blk: is it the last block
  44  * @sg: used to chain sg lists
  45  * @authkey: pointer to auth key in sha ctx
  46  * @authklen: auth key length
  47  * @result_sg: scatterlist used for result buffer
  48  */
  49 struct qce_sha_reqctx {
  50         u8 buf[QCE_SHA_MAX_BLOCKSIZE];
  51         u8 tmpbuf[QCE_SHA_MAX_BLOCKSIZE];
  52         u8 digest[QCE_SHA_MAX_DIGESTSIZE];
  53         unsigned int buflen;
  54         unsigned long flags;
  55         struct scatterlist *src_orig;
  56         unsigned int nbytes_orig;
  57         int src_nents;
  58         __be32 byte_count[2];
  59         u64 count;
  60         bool first_blk;
  61         bool last_blk;
  62         struct scatterlist sg[2];
  63         u8 *authkey;
  64         unsigned int authklen;
  65         struct scatterlist result_sg;
  66 };
  67
  68 static inline struct qce_alg_template *to_ahash_tmpl(struct crypto_tfm *tfm)
  69 {
  70         struct crypto_ahash *ahash = __crypto_ahash_cast(tfm);
  71         struct ahash_alg *alg = container_of(crypto_hash_alg_common(ahash),
  72                                              struct ahash_alg, halg);
  73
  74         return container_of(alg, struct qce_alg_template, alg.ahash);
  75 }
  76
  77 extern const struct qce_algo_ops ahash_ops;
  78
  79 #endif /* _SHA_H_ */