OSX/sec/Security/SecOTRMath.h

   1 /*
   2  * Copyright (c) 2011-2012,2014 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 #ifndef _SECOTRMATH_H_
  26 #define _SECOTRMATH_H_
  27
  28 #include <CoreFoundation/CFBase.h>
  29
  30 #include <corecrypto/ccn.h>
  31 #include <corecrypto/ccaes.h>
  32 #include <corecrypto/ccmode.h>
  33
  34 #define kOTRAuthKeyBytes 16
  35 #define kOTRAuthMACKeyBytes 32
  36
  37 #define kOTRMessageKeyBytes 16
  38 #define kOTRMessageMacKeyBytes 20
  39
  40 #define kExponentiationBits 1536
  41 #define kExponentiationUnits ccn_nof(kExponentiationBits)
  42 #define kExponentiationBytes ((kExponentiationBits+7)/8)
  43
  44 #define kSHA256HMAC160Bits  160
  45 #define kSHA256HMAC160Bytes (kSHA256HMAC160Bits/8)
  46
  47 typedef enum {
  48     kSSID = 0x00,
  49     kCs = 0x01,
  50     kM1 = 0x02,
  51     kM2 = 0x03,
  52     kM1Prime = 0x04,
  53     kM2Prime = 0x05
  54 } OTRKeyType;
  55
  56
  57 void DeriveOTR256BitsFromS(OTRKeyType whichKey, size_t sSize, const cc_unit* s, size_t keySize, uint8_t* key);
  58 void DeriveOTR128BitPairFromS(OTRKeyType whichHalf, size_t sSize, const cc_unit* s,
  59                               size_t firstKeySize, uint8_t* firstKey,
  60                               size_t secondKeySize, uint8_t* secondKey);
  61 void DeriveOTR64BitsFromS(OTRKeyType whichKey, size_t sSize, const cc_unit* s,
  62                           size_t firstKeySize, uint8_t* firstKey);
  63
  64
  65 void AES_CTR_HighHalf_Transform(size_t keySize, const uint8_t* key,
  66                                 uint64_t highHalf,
  67                                 size_t howMuch, const uint8_t* from,
  68                                 uint8_t* to);
  69
  70 void AES_CTR_IV0_Transform(size_t keySize, const uint8_t* key,
  71                            size_t howMuch, const uint8_t* from,
  72                            uint8_t* to);
  73
  74 #endif