arch/s390/crypto/sha.h

   1 /*
   2  * Cryptographic API.
   3  *
   4  * s390 generic implementation of the SHA Secure Hash Algorithms.
   5  *
   6  * Copyright IBM Corp. 2007
   7  * Author(s): Jan Glauber (jang@de.ibm.com)
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by the Free
  11  * Software Foundation; either version 2 of the License, or (at your option)
  12  * any later version.
  13  *
  14  */
  15 #ifndef _CRYPTO_ARCH_S390_SHA_H
  16 #define _CRYPTO_ARCH_S390_SHA_H
  17
  18 #include <linux/crypto.h>
  19 #include <crypto/sha.h>
  20
  21 /* must be big enough for the largest SHA variant */
  22 #define SHA_MAX_STATE_SIZE      (SHA512_DIGEST_SIZE / 4)
  23 #define SHA_MAX_BLOCK_SIZE      SHA512_BLOCK_SIZE
  24
  25 struct s390_sha_ctx {
  26         u64 count;              /* message length in bytes */
  27         u32 state[SHA_MAX_STATE_SIZE];
  28         u8 buf[2 * SHA_MAX_BLOCK_SIZE];
  29         int func;               /* KIMD function to use */
  30 };
  31
  32 struct shash_desc;
  33
  34 int s390_sha_update(struct shash_desc *desc, const u8 *data, unsigned int len);
  35 int s390_sha_final(struct shash_desc *desc, u8 *out);
  36
  37 #endif