Security/libsecurity_cdsa_utilities/lib/cssmcred.cpp

   1 /*
   2  * Copyright (c) 2000-2001,2003-2004,2006,2011,2014 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,
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  18  * Please see the License for the specific language governing rights and
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  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24
  25 //
  26 // cssmcred - enhanced PodWrappers and construction aids for ACL credentials
  27 //
  28 #include <security_cdsa_utilities/cssmcred.h>
  29
  30
  31 namespace Security {
  32
  33
  34 //
  35 // The null credential constant.
  36 //
  37 static const CSSM_ACCESS_CREDENTIALS null_credentials = { "" }; // and more nulls
  38 #if BUG_GCC
  39 const AccessCredentials &AccessCredentials::null =
  40     *static_cast<const AccessCredentials *>(&null_credentials);
  41 #else
  42 const AccessCredentials &AccessCredentials::null =
  43     static_cast<const AccessCredentials &>(null_credentials);
  44 #endif
  45
  46
  47 //
  48 // Scan a SampleGroup for samples with a given CSSM_SAMPLE_TYPE.
  49 // Collect all matching samples into a list (which is cleared to begin with).
  50 // Return true if any were found, false if none.
  51 // Throw if any of the samples are obviously malformed.
  52 //
  53 bool SampleGroup::collect(CSSM_SAMPLE_TYPE sampleType, list<CssmSample> &matches) const
  54 {
  55         for (uint32 n = 0; n < length(); n++) {
  56                 TypedList sample = (*this)[n];
  57                 sample.checkProper();
  58                 if (sample.type() == sampleType) {
  59                         sample.snip();  // skip sample type
  60                         matches.push_back(sample);
  61                 }
  62         }
  63         return !matches.empty();
  64 }
  65
  66
  67 //
  68 // AccessCredentials
  69 //
  70 void AccessCredentials::tag(const char *tagString)
  71 {
  72         if (tagString == NULL)
  73                 EntryTag[0] = '\0';
  74         else if (strlen(tagString) > CSSM_MODULE_STRING_SIZE)
  75                 CssmError::throwMe(CSSM_ERRCODE_INVALID_ACL_ENTRY_TAG);
  76         else
  77                 strcpy(EntryTag, tagString);
  78 }
  79
  80
  81 //
  82 // AutoCredentials self-constructing credentials structure
  83 //
  84 AutoCredentials::AutoCredentials(Allocator &alloc) : allocator(alloc)
  85 {
  86         init();
  87 }
  88
  89 AutoCredentials::AutoCredentials(Allocator &alloc, uint32 nSamples) : allocator(alloc)
  90 {
  91         init();
  92         getSample(nSamples - 1);        // extend array to nSamples elements
  93 }
  94
  95 void AutoCredentials::init()
  96 {
  97         sampleArray = NULL;
  98         nSamples = 0;
  99 }
 100
 101
 102 CssmSample &AutoCredentials::getSample(uint32 n)
 103 {
 104         if (n >= nSamples) {
 105                 sampleArray = allocator.alloc<CssmSample>(sampleArray, nSamples = n + 1);
 106                 Samples.Samples = sampleArray;
 107                 Samples.NumberOfSamples = nSamples;
 108         }
 109         return sampleArray[n];
 110 }
 111
 112 }       // end namespace Security