OSX/sec/Security/SecTrustStatusCodes.c

   1 /*
   2  * Copyright (c) 2017 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  * SecTrustStatusCodes.c - map trust result details to status codes
  24  *
  25  */
  26
  27 #include <Security/SecTrustPriv.h>
  28 #include <Security/SecInternal.h>
  29 #include <Security/SecTrustStatusCodes.h>
  30 #include <CoreFoundation/CoreFoundation.h>
  31
  32 struct resultmap_entry_s {
  33     const CFStringRef checkstr;
  34     const int32_t resultcode;
  35 };
  36 typedef struct resultmap_entry_s resultmap_entry_t;
  37
  38 const resultmap_entry_t resultmap[] = {
  39 #undef POLICYCHECKMACRO
  40 #define POLICYCHECKMACRO(NAME, TRUSTRESULT, SUBTYPE, LEAFCHECK, PATHCHECK, LEAFONLY, CSSMERR, OSSTATUS) \
  41 { CFSTR(#NAME), CSSMERR },
  42 #include "SecPolicyChecks.list"
  43 };
  44
  45 //
  46 // Returns a malloced array of SInt32 values, with the length in numStatusCodes,
  47 // for the certificate specified by chain index in the given SecTrustRef.
  48 //
  49 // To match legacy behavior, the array actually allocates one element more than the
  50 // value of numStatusCodes; if the certificate is revoked, the additional element
  51 // at the end contains the CrlReason value.
  52 //
  53 // Caller must free the returned pointer.
  54 //
  55 SInt32 *SecTrustCopyStatusCodes(SecTrustRef trust,
  56     CFIndex index, CFIndex *numStatusCodes)
  57 {
  58     if (!trust || !numStatusCodes) {
  59         return NULL;
  60     }
  61     *numStatusCodes = 0;
  62     CFArrayRef details = SecTrustCopyFilteredDetails(trust);
  63     CFIndex chainLength = (details) ? CFArrayGetCount(details) : 0;
  64     if (!(index < chainLength)) {
  65         CFReleaseSafe(details);
  66         return NULL;
  67     }
  68     CFDictionaryRef detail = (CFDictionaryRef)CFArrayGetValueAtIndex(details, index);
  69     CFIndex ix, detailCount = CFDictionaryGetCount(detail);
  70     *numStatusCodes = (unsigned int)detailCount;
  71
  72     // Allocate one more entry than we need; this is used to store a CrlReason
  73     // at the end of the array.
  74     SInt32 *statusCodes = (SInt32*)malloc((detailCount+1) * sizeof(SInt32));
  75     statusCodes[*numStatusCodes] = 0;
  76
  77     const unsigned int resultmaplen = sizeof(resultmap) / sizeof(resultmap_entry_t);
  78     const void *keys[detailCount];
  79     CFDictionaryGetKeysAndValues(detail, &keys[0], NULL);
  80     for (ix = 0; ix < detailCount; ix++) {
  81         CFStringRef key = (CFStringRef)keys[ix];
  82         SInt32 statusCode = 0;
  83         for (unsigned int mapix = 0; mapix < resultmaplen; mapix++) {
  84             CFStringRef str = (CFStringRef) resultmap[mapix].checkstr;
  85             if (CFStringCompare(str, key, 0) == kCFCompareEqualTo) {
  86                 statusCode = (SInt32) resultmap[mapix].resultcode;
  87                 break;
  88             }
  89         }
  90         if (statusCode == (SInt32)0x8001210C) {  /* CSSMERR_TP_CERT_REVOKED */
  91             SInt32 reason;
  92             CFNumberRef number = (CFNumberRef)CFDictionaryGetValue(detail, key);
  93             if (number && CFNumberGetValue(number, kCFNumberSInt32Type, &reason)) {
  94                 statusCodes[*numStatusCodes] = (SInt32)reason;
  95             }
  96         }
  97         statusCodes[ix] = statusCode;
  98     }
  99
 100     CFReleaseSafe(details);
 101     return statusCodes;
 102 }