cdsa/cssm/cssmmds.cpp

   1 /*
   2  * Copyright (c) 2000-2001 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18
  19 //
  20 // cssmmds - MDS interface for CSSM & friends
  21 //
  22 #ifdef __MWERKS__
  23 #define _CPP_CSSMMDS
  24 #endif
  25 #include "cssmmds.h"
  26 #include <ctype.h>
  27
  28
  29 ModuleNexus<MdsComponent::MDS> MdsComponent::mds;
  30
  31
  32 MdsComponent::MdsComponent(const Guid &guid) : mMyGuid(guid)
  33 {
  34     mIsValid = false;
  35 }
  36
  37 MdsComponent::~MdsComponent()
  38 {
  39 }
  40
  41
  42 void MdsComponent::getInfo() const
  43 {
  44     rewind(mds().config);
  45     char buffer[1024];
  46     while (fgets(buffer, sizeof(buffer), mds().config)) {
  47                 static const char space[] = " \t\f";
  48                 char *p = buffer + strspn(buffer, space);
  49                 if (*p == '#' || *p == '\0' || *p == '\n')
  50                         continue;       // comment or blank line
  51
  52                 // field 1: guid
  53                 const char *guid = p; p += strcspn(p, space);
  54                 if (!*p) CssmError::throwMe(CSSM_ERRCODE_MDS_ERROR);
  55                 *p++ = '\0';
  56                 try {
  57                         if (Guid(guid) != mMyGuid)
  58                                 continue;       // no match this line
  59                 } catch (const CssmCommonError &error) {
  60                         if (error.cssmError() == CSSM_ERRCODE_INVALID_GUID)
  61                                 CssmError::throwMe(CSSM_ERRCODE_MDS_ERROR);     // invalid file guid => MDS error
  62                         throw;  // pass all other errors
  63                 }
  64
  65                 // field 2: flags/options
  66                 p += strspn(p, space);
  67                 mServices = 0;
  68                 mIsThreadSafe = false;
  69                 while (*p && !isspace(*p)) {
  70                         switch (*p) {
  71                         case 'a':       mServices |= CSSM_SERVICE_AC; break;
  72                         case 'c':       mServices |= CSSM_SERVICE_CSP; break;
  73                         case 'd':       mServices |= CSSM_SERVICE_DL; break;
  74                         case 'C':       mServices |= CSSM_SERVICE_CL; break;
  75                         case 't':       mServices |= CSSM_SERVICE_TP; break;
  76                         case 'm':       mIsThreadSafe = true; break;
  77                         default:
  78                                 CssmError::throwMe(CSSM_ERRCODE_MDS_ERROR);
  79                         }
  80                         p++;
  81                 }
  82                 if (!*p) CssmError::throwMe(CSSM_ERRCODE_MDS_ERROR);
  83                 p += strspn(p, space);  // skip space
  84                 p[strlen(p)-1] = '\0';  // remove trailing newline
  85                 mPath = p;                              // rest of line is pathname, uninterpreted
  86         mIsValid = true;
  87         return;
  88     }
  89     // not found in file
  90     CssmError::throwMe(CSSM_ERRCODE_INVALID_GUID);      // @@@ should have "guid not found" error
  91 }
  92
  93
  94 #if !defined(_MDS_PATH)
  95 # define _MDS_PATH "/System/Library/Frameworks/Security.framework/Resources/MDS"
  96 #endif
  97
  98 MdsComponent::MDS::MDS()
  99 {
 100     const char *path = getenv("MDSPATH");
 101         if (path == NULL)
 102                         path = getenv("MDSFILE");
 103     if (path == NULL)
 104         path = _MDS_PATH;
 105     if (!(config = fopen(path, "r")))
 106         CssmError::throwMe(CSSM_ERRCODE_MDS_ERROR);
 107 }
 108
 109 MdsComponent::MDS::~MDS()
 110 {
 111     fclose(config);
 112 }