OSX/libsecurity_keychain/libDER/libDER/DER_Digest.h

   1 /*
   2  * Copyright (c) 2005-2016 Apple Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24
  25 /*
  26  * DER_Digest.h - DER encode a DigestInfo
  27  *
  28  */
  29
  30 #ifndef _DER_DIGEST_H_
  31 #define _DER_DIGEST_H_
  32
  33 #include <libDER/libDER.h>
  34
  35 __BEGIN_DECLS
  36
  37 /*
  38  * Create an encoded DigestInfo based on the specified SHA1 digest.
  39  * The incoming digest must be 20 bytes long.
  40  *
  41  * Result is placed in caller's buffer, which must be at least of
  42  * length DER_SHA1_DIGEST_INFO_LEN bytes.
  43  *
  44  * The *resultLen parameter is the available size in the result
  45  * buffer on input, and the actual length of the encoded DigestInfo
  46  * on output.
  47  */
  48 #define DER_SHA1_DIGEST_LEN                     20
  49 #define DER_SHA1_DIGEST_INFO_LEN        35
  50
  51 DERReturn DEREncodeSHA1DigestInfo(
  52         const DERByte   *sha1Digest,
  53         DERSize                 sha1DigestLen,
  54         DERByte                 *result,                /* encoded result RETURNED here */
  55         DERSize                 *resultLen);    /* IN/OUT */
  56
  57 #define DER_SHA256_DIGEST_LEN           32
  58 #define DER_SHA256_DIGEST_INFO_LEN      51
  59
  60 DERReturn DEREncodeSHA256DigestInfo(
  61         const DERByte   *sha256Digest,
  62         DERSize                 sha256DigestLen,
  63         DERByte                 *result,                /* encoded result RETURNED here */
  64         DERSize                 *resultLen);    /* IN/OUT */
  65
  66 /*
  67  * Likewise, create an encoded DIgestInfo for specified MD5 or MD2 digest.
  68  */
  69 #define DER_MD_DIGEST_LEN                       16
  70 #define DER_MD_DIGEST_INFO_LEN          34
  71
  72 typedef enum {
  73         WD_MD2 = 1,
  74         WD_MD5 = 2
  75 } WhichDigest;
  76
  77 DERReturn DEREncodeMDDigestInfo(
  78         WhichDigest             whichDigest,
  79         const DERByte   *mdDigest,
  80         DERSize                 mdDigestLen,
  81         DERByte                 *result,                /* encoded result RETURNED here */
  82         DERSize                 *resultLen);    /* IN/OUT */
  83
  84 /* max sizes you'll need in the general cases */
  85 #define DER_MAX_DIGEST_LEN                      DER_SHA256_DIGEST_LEN
  86 #define DER_MAX_ENCODED_INFO_LEN        DER_SHA256_DIGEST_INFO_LEN
  87
  88 __END_DECLS
  89
  90 #endif  /* _DER_DIGEST_H_ */
  91