AppleCSP/MiscCSPAlgs/SHA1.h

   1 /* Copyright (c) 1998 Apple Computer, Inc.  All rights reserved.
   2  *
   3  * NOTICE: USE OF THE MATERIALS ACCOMPANYING THIS NOTICE IS SUBJECT
   4  * TO THE TERMS OF THE SIGNED "FAST ELLIPTIC ENCRYPTION (FEE) REFERENCE
   5  * SOURCE CODE EVALUATION AGREEMENT" BETWEEN APPLE COMPUTER, INC. AND THE
   6  * ORIGINAL LICENSEE THAT OBTAINED THESE MATERIALS FROM APPLE COMPUTER,
   7  * INC.  ANY USE OF THESE MATERIALS NOT PERMITTED BY SUCH AGREEMENT WILL
   8  * EXPOSE YOU TO LIABILITY.
   9  ***************************************************************************
  10  *
  11  * SHA1.h - generic, portable SHA-1 hash object
  12  *
  13  * Revision History
  14  * ----------------
  15  * 05 Jan 1998  Doug Mitchell at Apple
  16  *      Created.
  17  */
  18
  19 #ifndef _CK_SHA1_H_
  20 #define _CK_SHA1_H_
  21
  22 #ifdef __cplusplus
  23 extern "C" {
  24 #endif
  25
  26 #define SHA1_DIGEST_SIZE                20      /* in bytes */
  27 #define SHA1_BLOCK_SIZE                 64      /* in bytes */
  28
  29 /*
  30  * Opaque sha1 object handle.
  31  */
  32 typedef void *sha1Obj;
  33
  34 /*
  35  * Alloc and init an empty sha1 object.
  36  */
  37 sha1Obj sha1Alloc(void);
  38
  39 /*
  40  * reinitialize an sha1 object for reuse.
  41  */
  42 void sha1Reinit(sha1Obj sha1);
  43
  44 /*
  45  * Free an sha1 object.
  46  */
  47 void sha1Free(sha1Obj sha1);
  48
  49 /*
  50  * Add some data to the sha1 object.
  51  */
  52 void sha1AddData(sha1Obj sha1,
  53         const unsigned char *data,
  54         unsigned dataLen);
  55
  56 /*
  57  * Obtain a pointer to completed message digest. This disables further calls
  58  * to sha1AddData(). This pointer is NOT malloc'd; the associated data
  59  * persists only as long as this object does.
  60  */
  61 unsigned char *sha1Digest(sha1Obj sha1);
  62
  63 /* As above, with copy. */
  64 void sha1GetDigest(sha1Obj sha1,
  65         unsigned char *digest);
  66
  67 /*
  68  * Obtain the length of the message digest.
  69  */
  70 unsigned sha1DigestLen(void);
  71
  72 #ifdef __cplusplus
  73 }
  74 #endif
  75
  76 #endif  /*_CK_SHA1_H_*/