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
  27
  28 ModuleNexus<MdsComponent::MDS> MdsComponent::mds;
  29
  30
  31 MdsComponent::MdsComponent(const Guid &guid) : mMyGuid(guid)
  32 {
  33     mIsValid = false;
  34 }
  35
  36 MdsComponent::~MdsComponent()
  37 {
  38 }
  39
  40
  41 void MdsComponent::getInfo() const
  42 {
  43     rewind(mds().config);
  44     char buffer[1024];
  45     while (fgets(buffer, sizeof(buffer), mds().config)) {
  46                 static const char space[] = " \t\f";
  47                 char *p = buffer + strspn(buffer, space);
  48                 if (*p == '#' || *p == '\0' || *p == '\n')
  49                         continue;       // comment or blank line
  50
  51                 // field 1: guid
  52                 const char *guid = p; p += strcspn(p, space);
  53                 if (!*p) CssmError::throwMe(CSSM_ERRCODE_MDS_ERROR);
  54                 *p++ = '\0';
  55                 try {
  56                         if (Guid(guid) != mMyGuid)
  57                                 continue;       // no match this line
  58                 } catch (CssmCommonError &error) {
  59                         if (error.cssmError() == CSSM_ERRCODE_INVALID_GUID)
  60                                 CssmError::throwMe(CSSM_ERRCODE_MDS_ERROR);     // invalid file guid => MDS error
  61                         throw;  // pass all other errors
  62                 }
  63
  64                 // field 2: flags/options
  65                 p += strspn(p, space);
  66                 mServices = 0;
  67                 mIsThreadSafe = false;
  68                 while (*p && !isspace(*p)) {
  69                         switch (*p) {
  70                         case 'a':       mServices |= CSSM_SERVICE_AC; break;
  71                         case 'c':       mServices |= CSSM_SERVICE_CSP; break;
  72                         case 'd':       mServices |= CSSM_SERVICE_DL; break;
  73                         case 'C':       mServices |= CSSM_SERVICE_CL; break;
  74                         case 't':       mServices |= CSSM_SERVICE_TP; break;
  75                         case 'm':       mIsThreadSafe = true; break;
  76                         default:
  77                                 CssmError::throwMe(CSSM_ERRCODE_MDS_ERROR);
  78                         }
  79                         p++;
  80                 }
  81                 if (!*p) CssmError::throwMe(CSSM_ERRCODE_MDS_ERROR);
  82                 p += strspn(p, space);  // skip space
  83                 p[strlen(p)-1] = '\0';  // remove trailing newline
  84                 mPath = p;                              // rest of line is pathname, uninterpreted
  85         mIsValid = true;
  86         return;
  87     }
  88     // not found in file
  89     CssmError::throwMe(CSSM_ERRCODE_INVALID_GUID);      // @@@ should have "guid not found" error
  90 }
  91
  92
  93 #if !defined(_MDS_PATH)
  94 # define _MDS_PATH "/System/Library/Frameworks/Security.framework/Resources/MDS"
  95 #endif
  96
  97 MdsComponent::MDS::MDS()
  98 {
  99     const char *path = getenv("MDSPATH");
 100         if (path == NULL)
 101                         path = getenv("MDSFILE");
 102     if (path == NULL)
 103         path = _MDS_PATH;
 104     if (!(config = fopen(path, "r")))
 105         CssmError::throwMe(CSSM_ERRCODE_MDS_ERROR);
 106 }
 107
 108 MdsComponent::MDS::~MDS()
 109 {
 110     fclose(config);
 111 }