OSX/libsecurity_cryptkit/lib/NSMD5Hash.m

   1 /* Copyright (c) 1998,2011,2014 Apple 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, INC. AND THE
   6  * ORIGINAL LICENSEE THAT OBTAINED THESE MATERIALS FROM APPLE,
   7  * INC.  ANY USE OF THESE MATERIALS NOT PERMITTED BY SUCH AGREEMENT WILL
   8  * EXPOSE YOU TO LIABILITY.
   9  ***************************************************************************
  10  *
  11  * NSMD5Hash.h
  12  *
  13  * Revision History
  14  * ----------------
  15  * 28 Mar 97 at Apple
  16  *      Created.
  17  */
  18
  19 /*
  20  * Note: our _priv ivar is actually a feeHash pointer.
  21  */
  22 #import "NSCryptors.h"
  23 #import "NSMD5Hash.h"
  24 #import "feeHash.h"
  25 #import "falloc.h"
  26
  27 @implementation NSMD5Hash
  28
  29 + digester
  30 {
  31         return [[self alloc] init];
  32 }
  33
  34 - init
  35 {
  36         if(_priv == NULL) {
  37                 _priv = feeHashAlloc();
  38         }
  39         else {
  40                 feeHashReinit(_priv);
  41         }
  42         return self;
  43 }
  44
  45 - (void)digestData:(NSData *)data
  46 {
  47         if(_priv == NULL) {
  48                 return;
  49         }
  50         feeHashAddData(_priv, [data bytes], [data length]);
  51 }
  52
  53 - (NSData *)messageDigest
  54 {
  55         unsigned char *cp;
  56         NSData *md;
  57
  58         if(_priv == NULL) {
  59                 return nil;
  60         }
  61         cp = feeHashDigest(_priv);
  62         md = [NSData dataWithBytes:cp length:feeHashDigestLen()];
  63         feeHashReinit(_priv);
  64         return md;
  65 }
  66
  67 - (NSData *)digestData:(NSData *)data withSalt:(NSData *)salt
  68 {
  69         if(_priv == NULL) {
  70                 return nil;
  71         }
  72         if(salt != nil) {
  73                 [self digestData:salt];
  74         }
  75         [self digestData:data];
  76         return [self messageDigest];
  77 }
  78
  79 @end