include/crypto/sha1.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Common values for SHA-1 algorithms
   4  */
   5
   6 #ifndef _CRYPTO_SHA1_H
   7 #define _CRYPTO_SHA1_H
   8
   9 #include <linux/types.h>
  10
  11 #define SHA1_DIGEST_SIZE        20
  12 #define SHA1_BLOCK_SIZE         64
  13
  14 #define SHA1_H0         0x67452301UL
  15 #define SHA1_H1         0xefcdab89UL
  16 #define SHA1_H2         0x98badcfeUL
  17 #define SHA1_H3         0x10325476UL
  18 #define SHA1_H4         0xc3d2e1f0UL
  19
  20 extern const u8 sha1_zero_message_hash[SHA1_DIGEST_SIZE];
  21
  22 struct sha1_state {
  23         u32 state[SHA1_DIGEST_SIZE / 4];
  24         u64 count;
  25         u8 buffer[SHA1_BLOCK_SIZE];
  26 };
  27
  28 struct shash_desc;
  29
  30 extern int crypto_sha1_update(struct shash_desc *desc, const u8 *data,
  31                               unsigned int len);
  32
  33 extern int crypto_sha1_finup(struct shash_desc *desc, const u8 *data,
  34                              unsigned int len, u8 *hash);
  35
  36 /*
  37  * An implementation of SHA-1's compression function.  Don't use in new code!
  38  * You shouldn't be using SHA-1, and even if you *have* to use SHA-1, this isn't
  39  * the correct way to hash something with SHA-1 (use crypto_shash instead).
  40  */
  41 #define SHA1_DIGEST_WORDS       (SHA1_DIGEST_SIZE / 4)
  42 #define SHA1_WORKSPACE_WORDS    16
  43 void sha1_init(__u32 *buf);
  44 void sha1_transform(__u32 *digest, const char *data, __u32 *W);
  45
  46 #endif /* _CRYPTO_SHA1_H */