lib/sha1.h

   1 /*
   2  * This file is from the Apache Portable Runtime Library.
   3  * The full upstream copyright and license statement is included below.
   4  * Modifications copyright (c) 2009 Nicira, Inc.
   5  */
   6
   7 /* Licensed to the Apache Software Foundation (ASF) under one or more
   8  * contributor license agreements.  See the NOTICE file distributed with
   9  * this work for additional information regarding copyright ownership.
  10  * The ASF licenses this file to You under the Apache License, Version 2.0
  11  * (the "License"); you may not use this file except in compliance with
  12  * the License.  You may obtain a copy of the License at
  13  *
  14  *     http://www.apache.org/licenses/LICENSE-2.0
  15  *
  16  * Unless required by applicable law or agreed to in writing, software
  17  * distributed under the License is distributed on an "AS IS" BASIS,
  18  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  19  * See the License for the specific language governing permissions and
  20  * limitations under the License.
  21  */
  22 /* NIST Secure Hash Algorithm
  23  *  heavily modified by Uwe Hollerbach uh@alumni.caltech edu
  24  *  from Peter C. Gutmann's implementation as found in
  25  *  Applied Cryptography by Bruce Schneier
  26  *  This code is hereby placed in the public domain
  27  */
  28
  29 #ifndef SHA1_H
  30 #define SHA1_H
  31
  32 #include <stdbool.h>
  33 #include <stddef.h>
  34 #include <stdint.h>
  35
  36 #define SHA1_DIGEST_SIZE 20     /* Size of the SHA1 digest. */
  37 #define SHA1_HEX_DIGEST_LEN 40  /* Length of SHA1 digest as hex in ASCII. */
  38
  39 /* SHA1 context structure. */
  40 struct sha1_ctx {
  41     uint32_t digest[5];          /* Message digest. */
  42     uint32_t count_lo, count_hi; /* 64-bit bit counts. */
  43     uint32_t data[16];           /* SHA data buffer */
  44     int local;                   /* Unprocessed amount in data. */
  45 };
  46
  47 void sha1_init(struct sha1_ctx *);
  48 void sha1_update(struct sha1_ctx *, const void *, uint32_t size);
  49 void sha1_final(struct sha1_ctx *, uint8_t digest[SHA1_DIGEST_SIZE]);
  50 void sha1_bytes(const void *, uint32_t size, uint8_t digest[SHA1_DIGEST_SIZE]);
  51
  52 #define SHA1_FMT \
  53         "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x" \
  54         "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
  55 #define SHA1_ARGS(DIGEST) \
  56     ((DIGEST)[0]), ((DIGEST)[1]), ((DIGEST)[2]), ((DIGEST)[3]), \
  57     ((DIGEST)[4]), ((DIGEST)[5]), ((DIGEST)[6]), ((DIGEST)[7]), \
  58     ((DIGEST)[8]), ((DIGEST)[9]), ((DIGEST)[10]), ((DIGEST)[11]), \
  59     ((DIGEST)[12]), ((DIGEST)[13]), ((DIGEST)[14]), ((DIGEST)[15]), \
  60     ((DIGEST)[16]), ((DIGEST)[17]), ((DIGEST)[18]), ((DIGEST)[19])
  61
  62 void sha1_to_hex(const uint8_t digest[SHA1_DIGEST_SIZE],
  63                  char hex[SHA1_HEX_DIGEST_LEN + 1]);
  64 bool sha1_from_hex(uint8_t digest[SHA1_DIGEST_SIZE], const char *hex);
  65
  66 #endif  /* sha1.h */