include/digest.h

   1 /*
   2  * Copyright (c) 2007-2010 Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  */
  22
  23 #ifndef __DIGEST_H
  24 #define __DIGEST_H
  25
  26 #define DIGEST_QUERY            0
  27 #define DIGEST_SHA1             1
  28
  29 struct digest_ctx_sha1 {
  30         u32 H[5];
  31         u64 mbl;
  32         u8 buflen;
  33         u8 buf[64];
  34 } __attribute__((packed,aligned(8)));
  35
  36 struct digest_ctx {
  37         u8 type;
  38         u8 __reserved[7];
  39         union {
  40                 struct digest_ctx_sha1 sha1;
  41         };
  42 };
  43
  44 struct digest_info {
  45         void (*init)(struct digest_ctx *);
  46         void (*update)(struct digest_ctx *, u8 *, u64);
  47         void (*finalize)(struct digest_ctx *, u8 *, u64);
  48 };
  49
  50 extern int digest_init_ctx(int dt, struct digest_ctx *ctx);
  51 extern void digest_update_ctx(struct digest_ctx *ctx, u8 *data, u64 len);
  52 extern void digest_finalize_ctx(struct digest_ctx *ctx, u8 *data, u64 len);
  53
  54 #endif