OSX/sec/Security/SecDigest.c

   1 /*
   2  * Copyright (c) 2006-2010,2012-2015 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 #ifdef STANDALONE
  25 /* Allows us to build genanchors against the BaseSDK. */
  26 #undef __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__
  27 #undef __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
  28 #endif
  29
  30 #include "SecFramework.h"
  31 #include <dispatch/dispatch.h>
  32 #include <CommonCrypto/CommonDigest.h>
  33 #include <CommonCrypto/CommonDigestSPI.h>
  34 #include <Security/SecAsn1Coder.h>
  35 #include <Security/oidsalg.h>
  36 #include <utilities/SecCFWrappers.h>
  37 #include <Security/SecBase.h>
  38 #include <inttypes.h>
  39
  40 /* Return the SHA1 digest of a chunk of data as newly allocated CFDataRef. */
  41 CFDataRef SecSHA1DigestCreate(CFAllocatorRef allocator,
  42                               const UInt8 *data, CFIndex length) {
  43     if (length < 0 || length > INT32_MAX || data == NULL) {
  44         return NULL; /* guard against passing bad values to digest function */
  45     }
  46     CFMutableDataRef digest = CFDataCreateMutable(allocator,
  47                                                   CC_SHA1_DIGEST_LENGTH);
  48     CFDataSetLength(digest, CC_SHA1_DIGEST_LENGTH);
  49     CCDigest(kCCDigestSHA1, data, length, CFDataGetMutableBytePtr(digest));
  50     return digest;
  51 }
  52
  53 CFDataRef SecSHA256DigestCreate(CFAllocatorRef allocator,
  54                                 const UInt8 *data, CFIndex length) {
  55     if (length < 0 || length > INT32_MAX || data == NULL) {
  56         return NULL; /* guard against passing bad values to digest function */
  57     }
  58     CFMutableDataRef digest = CFDataCreateMutable(allocator,
  59                                                   CC_SHA256_DIGEST_LENGTH);
  60     CFDataSetLength(digest, CC_SHA256_DIGEST_LENGTH);
  61     CCDigest(kCCDigestSHA256, data, length, CFDataGetMutableBytePtr(digest));
  62     return digest;
  63 }
  64
  65 CFDataRef SecSHA256DigestCreateFromData(CFAllocatorRef allocator, CFDataRef data) {
  66     CFMutableDataRef digest = CFDataCreateMutable(allocator,
  67                                                   CC_SHA256_DIGEST_LENGTH);
  68     CFDataSetLength(digest, CC_SHA256_DIGEST_LENGTH);
  69     CCDigest(kCCDigestSHA256, CFDataGetBytePtr(data), CFDataGetLength(data), CFDataGetMutableBytePtr(digest));
  70     return digest;
  71 }
  72
  73 CFDataRef SecDigestCreate(CFAllocatorRef allocator,
  74                           const SecAsn1Oid *algorithm, const SecAsn1Item *params,
  75                           const UInt8 *data, CFIndex length) {
  76     unsigned char *(*digestFcn)(const void *data, CC_LONG len, unsigned char *md);
  77     CFIndex digestLen;
  78
  79     if (length < 0 || length > INT32_MAX || data == NULL)
  80         return NULL; /* guard against passing bad values to digest function */
  81
  82     if (SecAsn1OidCompare(algorithm, &CSSMOID_SHA1)) {
  83         digestFcn = CC_SHA1;
  84         digestLen = CC_SHA1_DIGEST_LENGTH;
  85     } else if (SecAsn1OidCompare(algorithm, &CSSMOID_SHA224)) {
  86         digestFcn = CC_SHA224;
  87         digestLen = CC_SHA224_DIGEST_LENGTH;
  88     } else if (SecAsn1OidCompare(algorithm, &CSSMOID_SHA256)) {
  89         digestFcn = CC_SHA256;
  90         digestLen = CC_SHA256_DIGEST_LENGTH;
  91     } else if (SecAsn1OidCompare(algorithm, &CSSMOID_SHA384)) {
  92         digestFcn = CC_SHA384;
  93         digestLen = CC_SHA384_DIGEST_LENGTH;
  94     } else if (SecAsn1OidCompare(algorithm, &CSSMOID_SHA512)) {
  95         digestFcn = CC_SHA512;
  96         digestLen = CC_SHA512_DIGEST_LENGTH;
  97     } else {
  98         return NULL;
  99     }
 100
 101     CFMutableDataRef digest = CFDataCreateMutable(allocator, digestLen);
 102     CFDataSetLength(digest, digestLen);
 103
 104     digestFcn(data, (CC_LONG)length, CFDataGetMutableBytePtr(digest));
 105     return digest;
 106 }