OSX/libsecurity_asn1/lib/pkcs7Templates.c

   1 /*
   2  * Copyright (c) 2003-2004,2008,2010,2012 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  * pkcs7Templates.cpp
  25  */
  26
  27 #include <stddef.h>
  28 #include "pkcs7Templates.h"
  29 #include "keyTemplates.h"       /* NSS_AlgorithmIDTemplate */
  30 #include "SecAsn1Templates.h"
  31 #include "nssUtils.h"
  32 #include "oidsattr.h"
  33
  34 const SecAsn1Template NSS_P7_DigestInfoTemplate[] = {
  35     { SEC_ASN1_SEQUENCE,
  36       0, NULL, sizeof(NSS_P7_DigestInfo) },
  37     { SEC_ASN1_INLINE,
  38           offsetof(NSS_P7_DigestInfo,digestAlgorithm),
  39           kSecAsn1AlgorithmIDTemplate },
  40     { SEC_ASN1_OCTET_STRING,
  41           offsetof(NSS_P7_DigestInfo,digest) },
  42     { 0 }
  43 };
  44
  45 /*
  46  * Uninterpreted ContentInfo, with content stripped from its
  47  * EXPLICIT CONTEXT_SPECIFIC wrapper
  48  */
  49 const SecAsn1Template NSS_P7_RawContentInfoTemplate[] = {
  50     { SEC_ASN1_SEQUENCE,
  51       0, NULL, sizeof(NSS_P7_RawContentInfo) },
  52     { SEC_ASN1_OBJECT_ID,
  53           offsetof(NSS_P7_RawContentInfo,contentType) },
  54         { SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_EXPLICIT |
  55           SEC_ASN1_CONSTRUCTED | SEC_ASN1_OPTIONAL | 0,
  56           offsetof(NSS_P7_RawContentInfo,content),
  57           kSecAsn1AnyTemplate },
  58     { 0 }
  59 };
  60
  61 /*
  62  * Individual ContentInfo.content templates
  63  */
  64 const SecAsn1Template NSS_P7_EncrContentInfoTemplate[] = {
  65     { SEC_ASN1_SEQUENCE,
  66       0, NULL, sizeof(NSS_P7_EncrContentInfo) },
  67     { SEC_ASN1_OBJECT_ID,
  68           offsetof(NSS_P7_EncrContentInfo,contentType) },
  69     { SEC_ASN1_INLINE,
  70           offsetof(NSS_P7_EncrContentInfo,encrAlg),
  71           kSecAsn1AlgorithmIDTemplate },
  72         { SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_OPTIONAL | 0,
  73           offsetof(NSS_P7_EncrContentInfo,encrContent),
  74           kSecAsn1OctetStringTemplate },
  75     { 0 }
  76 };
  77
  78 const SecAsn1Template NSS_P7_EncryptedDataTemplate[] = {
  79     { SEC_ASN1_SEQUENCE,
  80       0, NULL, sizeof(NSS_P7_EncryptedData) },
  81         { SEC_ASN1_INTEGER,
  82           offsetof(NSS_P7_EncryptedData,version) },
  83         { SEC_ASN1_INLINE,
  84           offsetof(NSS_P7_EncryptedData,contentInfo),
  85           NSS_P7_EncrContentInfoTemplate },
  86    { 0 }
  87 };
  88
  89 const SecAsn1Template NSS_P7_PtrToEncryptedDataTemplate[] = {
  90     { SEC_ASN1_POINTER, 0, NSS_P7_EncryptedDataTemplate }
  91 };
  92
  93 /*
  94  * Decoded ContentInfo via SEC_ASN1_DYNAMIC
  95  */
  96
  97 static const SecAsn1Template * NSS_P7_ContentInfoChooser(
  98         void *arg,                      // --> NSS_P7_DecodedContentInfo
  99         Boolean enc,
 100         const char *buf,        // on decode, tag byte and length
 101         size_t len,
 102         void *dest)                     // --> NSS_P7_DecodedContentInfo.content
 103 {
 104         NSS_P7_DecodedContentInfo *dci =
 105                 (NSS_P7_DecodedContentInfo *)arg;
 106         const SecAsn1Template *templ = NULL;
 107         NSS_P7_CI_Type type = CT_None;
 108
 109         if(nssCompareSecAsn1Items(&dci->contentType,
 110                         &CSSMOID_PKCS7_Data)) {
 111                 templ = kSecAsn1PointerToOctetStringTemplate;
 112                 type = CT_Data;
 113         }
 114         else if(nssCompareSecAsn1Items(&dci->contentType,
 115                         &CSSMOID_PKCS7_EncryptedData)) {
 116                 templ = NSS_P7_PtrToEncryptedDataTemplate;
 117                 type = CT_EncryptedData;
 118         }
 119         else if(nssCompareSecAsn1Items(&dci->contentType,
 120                         &CSSMOID_PKCS7_SignedData)) {
 121                 templ = NSS_P7_PtrToSignedDataTemplate;
 122                 type = CT_SignedData;
 123         }
 124         else if(nssCompareSecAsn1Items(&dci->contentType,
 125                         &CSSMOID_PKCS7_EnvelopedData)) {
 126                 templ = NSS_P7_PtrToEnvelDataTemplate;
 127                 type = CT_EnvData;
 128         }
 129         else if(nssCompareSecAsn1Items(&dci->contentType,
 130                         &CSSMOID_PKCS7_SignedAndEnvelopedData)) {
 131                 templ = NSS_P7_PtrToSignEnvelDataTemplate;
 132                 type = CT_SignedEnvData;
 133         }
 134         else if(nssCompareSecAsn1Items(&dci->contentType,
 135                         &CSSMOID_PKCS7_DigestedData)) {
 136                 templ = NSS_P7_PtrToDigestedDataTemplate;
 137                 type = CT_DigestData;
 138         }
 139         /* add more here when we implement them */
 140         else {
 141                 return kSecAsn1PointerToAnyTemplate;
 142         }
 143         if(!enc) {
 144                 dci->type = type;
 145         }
 146         return templ;
 147 }
 148
 149 static const SecAsn1TemplateChooserPtr NSS_P7_ContentInfoChooserPtr =
 150         NSS_P7_ContentInfoChooser;
 151
 152 const SecAsn1Template NSS_P7_DecodedContentInfoTemplate[] = {
 153     { SEC_ASN1_SEQUENCE,
 154       0, NULL, sizeof(NSS_P7_DecodedContentInfo) },
 155     { SEC_ASN1_OBJECT_ID,
 156           offsetof(NSS_P7_DecodedContentInfo,contentType) },
 157     { SEC_ASN1_OPTIONAL | SEC_ASN1_DYNAMIC |
 158                         SEC_ASN1_EXPLICIT | SEC_ASN1_CONSTRUCTED |
 159                         SEC_ASN1_CONTEXT_SPECIFIC | 0,
 160           offsetof(NSS_P7_DecodedContentInfo,content),
 161           &NSS_P7_ContentInfoChooserPtr },
 162    { 0 }
 163 };