Quelle  cmsasn1.c   Sprache: C

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
 * CMS ASN.1 templates
 */

#include "cmslocal.h"

#include "cert.h"
#include "keyhi.h"
#include "secasn1.h"
#include "secitem.h"
#include "secoid.h"
#include "prtime.h"
#include "secerr.h"

extern const SEC_ASN1Template nss_cms_set_of_attribute_template[];

SEC_ASN1_MKSUB(CERT_IssuerAndSNTemplate)
SEC_ASN1_MKSUB(CERT_SetOfSignedCrlTemplate)
SEC_ASN1_MKSUB(SECOID_AlgorithmIDTemplate)
SEC_ASN1_MKSUB(SEC_BitStringTemplate)
SEC_ASN1_MKSUB(SEC_OctetStringTemplate)
SEC_ASN1_MKSUB(SEC_GeneralizedTimeTemplate)
SEC_ASN1_MKSUB(SEC_PointerToOctetStringTemplate)
SEC_ASN1_MKSUB(SEC_SetOfAnyTemplate)

/* -----------------------------------------------------------------------------
 * MESSAGE
 * (uses NSSCMSContentInfo)
 */

/* forward declaration */
static const SEC_ASN1Template *
nss_cms_choose_content_template(void *src_or_dest, PRBool encoding);

static const SEC_ASN1TemplateChooserPtr nss_cms_chooser = nss_cms_choose_content_template;

const SEC_ASN1Template NSSCMSMessageTemplate[] = {
    { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
      0, NULL, sizeof(NSSCMSMessage) },
    { SEC_ASN1_OBJECT_ID,
      offsetof(NSSCMSMessage, contentInfo.contentType) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_DYNAMIC | SEC_ASN1_MAY_STREAM |
          SEC_ASN1_EXPLICIT | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 0,
      offsetof(NSSCMSMessage, contentInfo.content),
      &nss_cms_chooser },
    { 0 }
};

/* -----------------------------------------------------------------------------
 * ENCAPSULATED & ENCRYPTED CONTENTINFO
 * (both use a NSSCMSContentInfo)
 */
static const SEC_ASN1Template NSSCMSEncapsulatedContentInfoTemplate[] = {
    { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
      0, NULL, sizeof(NSSCMSContentInfo) },
    { SEC_ASN1_OBJECT_ID,
      offsetof(NSSCMSContentInfo, contentType) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_EXPLICIT | SEC_ASN1_MAY_STREAM |
          SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_XTRN | 0,
      offsetof(NSSCMSContentInfo, rawContent),
      SEC_ASN1_SUB(SEC_PointerToOctetStringTemplate) },
    { 0 }
};

static const SEC_ASN1Template NSSCMSEncryptedContentInfoTemplate[] = {
    { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
      0, NULL, sizeof(NSSCMSContentInfo) },
    { SEC_ASN1_OBJECT_ID,
      offsetof(NSSCMSContentInfo, contentType) },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
      offsetof(NSSCMSContentInfo, contentEncAlg),
      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_POINTER | SEC_ASN1_MAY_STREAM |
          SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_XTRN | 0,
      offsetof(NSSCMSContentInfo, rawContent),
      SEC_ASN1_SUB(SEC_OctetStringTemplate) },
    { 0 }
};

/* -----------------------------------------------------------------------------
 * SIGNED DATA
 */

const SEC_ASN1Template NSSCMSSignerInfoTemplate[];

const SEC_ASN1Template NSSCMSSignedDataTemplate[] = {
    { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
      0, NULL, sizeof(NSSCMSSignedData) },
    { SEC_ASN1_INTEGER,
      offsetof(NSSCMSSignedData, version) },
    { SEC_ASN1_SET_OF | SEC_ASN1_XTRN,
      offsetof(NSSCMSSignedData, digestAlgorithms),
      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
    { SEC_ASN1_INLINE,
      offsetof(NSSCMSSignedData, contentInfo),
      NSSCMSEncapsulatedContentInfoTemplate },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC |
          SEC_ASN1_XTRN | 0,
      offsetof(NSSCMSSignedData, rawCerts),
      SEC_ASN1_SUB(SEC_SetOfAnyTemplate) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC |
          SEC_ASN1_XTRN | 1,
      offsetof(NSSCMSSignedData, crls),
      SEC_ASN1_SUB(CERT_SetOfSignedCrlTemplate) },
    { SEC_ASN1_SET_OF,
      offsetof(NSSCMSSignedData, signerInfos),
      NSSCMSSignerInfoTemplate },
    { 0 }
};

const SEC_ASN1Template NSS_PointerToCMSSignedDataTemplate[] = {
    { SEC_ASN1_POINTER, 0, NSSCMSSignedDataTemplate }
};

/* -----------------------------------------------------------------------------
 * signeridentifier
 */

static const SEC_ASN1Template NSSCMSSignerIdentifierTemplate[] = {
    { SEC_ASN1_CHOICE,
      offsetof(NSSCMSSignerIdentifier, identifierType), NULL,
      sizeof(NSSCMSSignerIdentifier) },
    { SEC_ASN1_POINTER | SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_XTRN | 0,
      offsetof(NSSCMSSignerIdentifier, id.subjectKeyID),
      SEC_ASN1_SUB(SEC_OctetStringTemplate),
      NSSCMSRecipientID_SubjectKeyID },
    { SEC_ASN1_POINTER | SEC_ASN1_XTRN,
      offsetof(NSSCMSSignerIdentifier, id.issuerAndSN),
      SEC_ASN1_SUB(CERT_IssuerAndSNTemplate),
      NSSCMSRecipientID_IssuerSN },
    { 0 }
};

/* -----------------------------------------------------------------------------
 * signerinfo
 */

const SEC_ASN1Template NSSCMSSignerInfoTemplate[] = {
    { SEC_ASN1_SEQUENCE,
      0, NULL, sizeof(NSSCMSSignerInfo) },
    { SEC_ASN1_INTEGER,
      offsetof(NSSCMSSignerInfo, version) },
    { SEC_ASN1_INLINE,
      offsetof(NSSCMSSignerInfo, signerIdentifier),
      NSSCMSSignerIdentifierTemplate },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
      offsetof(NSSCMSSignerInfo, digestAlg),
      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 0,
      offsetof(NSSCMSSignerInfo, authAttr),
      nss_cms_set_of_attribute_template },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
      offsetof(NSSCMSSignerInfo, digestEncAlg),
      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
    { SEC_ASN1_OCTET_STRING,
      offsetof(NSSCMSSignerInfo, encDigest) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 1,
      offsetof(NSSCMSSignerInfo, unAuthAttr),
      nss_cms_set_of_attribute_template },
    { 0 }
};

/* -----------------------------------------------------------------------------
 * ENVELOPED DATA
 */

static const SEC_ASN1Template NSSCMSOriginatorInfoTemplate[] = {
    { SEC_ASN1_SEQUENCE,
      0, NULL, sizeof(NSSCMSOriginatorInfo) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC |
          SEC_ASN1_XTRN | 0,
      offsetof(NSSCMSOriginatorInfo, rawCerts),
      SEC_ASN1_SUB(SEC_SetOfAnyTemplate) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC |
          SEC_ASN1_XTRN | 1,
      offsetof(NSSCMSOriginatorInfo, crls),
      SEC_ASN1_SUB(CERT_SetOfSignedCrlTemplate) },
    { 0 }
};

const SEC_ASN1Template NSSCMSRecipientInfoTemplate[];

const SEC_ASN1Template NSSCMSEnvelopedDataTemplate[] = {
    { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
      0, NULL, sizeof(NSSCMSEnvelopedData) },
    { SEC_ASN1_INTEGER,
      offsetof(NSSCMSEnvelopedData, version) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_POINTER | SEC_ASN1_CONSTRUCTED |
          SEC_ASN1_CONTEXT_SPECIFIC | 0,
      offsetof(NSSCMSEnvelopedData, originatorInfo),
      NSSCMSOriginatorInfoTemplate },
    { SEC_ASN1_SET_OF,
      offsetof(NSSCMSEnvelopedData, recipientInfos),
      NSSCMSRecipientInfoTemplate },
    { SEC_ASN1_INLINE,
      offsetof(NSSCMSEnvelopedData, contentInfo),
      NSSCMSEncryptedContentInfoTemplate },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 1,
      offsetof(NSSCMSEnvelopedData, unprotectedAttr),
      nss_cms_set_of_attribute_template },
    { 0 }
};

const SEC_ASN1Template NSS_PointerToCMSEnvelopedDataTemplate[] = {
    { SEC_ASN1_POINTER, 0, NSSCMSEnvelopedDataTemplate }
};

/* here come the 15 gazillion templates for all the v3 varieties of RecipientInfo */

/* -----------------------------------------------------------------------------
 * key transport recipient info
 */

static const SEC_ASN1Template NSSCMSRecipientIdentifierTemplate[] = {
    { SEC_ASN1_CHOICE,
      offsetof(NSSCMSRecipientIdentifier, identifierType), NULL,
      sizeof(NSSCMSRecipientIdentifier) },
    { SEC_ASN1_POINTER | SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_XTRN | 0,
      offsetof(NSSCMSRecipientIdentifier, id.subjectKeyID),
      SEC_ASN1_SUB(SEC_OctetStringTemplate),
      NSSCMSRecipientID_SubjectKeyID },
    { SEC_ASN1_POINTER | SEC_ASN1_XTRN,
      offsetof(NSSCMSRecipientIdentifier, id.issuerAndSN),
      SEC_ASN1_SUB(CERT_IssuerAndSNTemplate),
      NSSCMSRecipientID_IssuerSN },
    { 0 }
};

static const SEC_ASN1Template NSSCMSKeyTransRecipientInfoTemplate[] = {
    { SEC_ASN1_SEQUENCE,
      0, NULL, sizeof(NSSCMSKeyTransRecipientInfo) },
    { SEC_ASN1_INTEGER,
      offsetof(NSSCMSKeyTransRecipientInfo, version) },
    { SEC_ASN1_INLINE,
      offsetof(NSSCMSKeyTransRecipientInfo, recipientIdentifier),
      NSSCMSRecipientIdentifierTemplate },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
      offsetof(NSSCMSKeyTransRecipientInfo, keyEncAlg),
      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
    { SEC_ASN1_OCTET_STRING,
      offsetof(NSSCMSKeyTransRecipientInfo, encKey) },
    { 0 }
};

/* -----------------------------------------------------------------------------
 * key agreement recipient info
 */

static const SEC_ASN1Template NSSCMSOriginatorPublicKeyTemplate[] = {
    { SEC_ASN1_SEQUENCE,
      0, NULL, sizeof(NSSCMSOriginatorPublicKey) },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
      offsetof(NSSCMSOriginatorPublicKey, algorithmIdentifier),
      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
      offsetof(NSSCMSOriginatorPublicKey, publicKey),
      SEC_ASN1_SUB(SEC_BitStringTemplate) },
    { 0 }
};

static const SEC_ASN1Template NSSCMSOriginatorIdentifierOrKeyTemplate[] = {
    { SEC_ASN1_CHOICE,
      offsetof(NSSCMSOriginatorIdentifierOrKey, identifierType), NULL,
      sizeof(NSSCMSOriginatorIdentifierOrKey) },
    { SEC_ASN1_POINTER | SEC_ASN1_XTRN,
      offsetof(NSSCMSOriginatorIdentifierOrKey, id.issuerAndSN),
      SEC_ASN1_SUB(CERT_IssuerAndSNTemplate),
      NSSCMSOriginatorIDOrKey_IssuerSN },
    { SEC_ASN1_POINTER | SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_XTRN | 0,
      offsetof(NSSCMSOriginatorIdentifierOrKey, id.subjectKeyID),
      SEC_ASN1_SUB(SEC_OctetStringTemplate),
      NSSCMSOriginatorIDOrKey_SubjectKeyID },
    { SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 1,
      offsetof(NSSCMSOriginatorIdentifierOrKey, id.originatorPublicKey),
      NSSCMSOriginatorPublicKeyTemplate,
      NSSCMSOriginatorIDOrKey_OriginatorPublicKey },
    { 0 }
};

const SEC_ASN1Template NSSCMSOtherKeyAttributeTemplate[] = {
    { SEC_ASN1_SEQUENCE,
      0, NULL, sizeof(NSSCMSOtherKeyAttribute) },
    {
        SEC_ASN1_OBJECT_ID,
        offsetof(NSSCMSOtherKeyAttribute, keyAttrId),
    },
    {
        SEC_ASN1_OPTIONAL | SEC_ASN1_ANY,
        offsetof(NSSCMSOtherKeyAttribute, keyAttr),
    },
    {
        0,
    }
};

const SEC_ASN1Template NSSCMSRecipientKeyIdentifierTemplate[] = {
    { SEC_ASN1_SEQUENCE,
      0, NULL, sizeof(NSSCMSRecipientKeyIdentifier) },
    { SEC_ASN1_POINTER | SEC_ASN1_XTRN,
      offsetof(NSSCMSRecipientKeyIdentifier, subjectKeyIdentifier),
      SEC_ASN1_SUB(SEC_OctetStringTemplate) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_POINTER | SEC_ASN1_XTRN,
      offsetof(NSSCMSRecipientKeyIdentifier, date),
      SEC_ASN1_SUB(SEC_GeneralizedTimeTemplate) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_POINTER | SEC_ASN1_XTRN,
      offsetof(NSSCMSRecipientKeyIdentifier, other),
      NSSCMSOtherKeyAttributeTemplate },
    { 0 }
};

static const SEC_ASN1Template NSSCMSKeyAgreeRecipientIdentifierTemplate[] = {
    { SEC_ASN1_CHOICE,
      offsetof(NSSCMSKeyAgreeRecipientIdentifier, identifierType), NULL,
      sizeof(NSSCMSKeyAgreeRecipientIdentifier) },
    { SEC_ASN1_POINTER | SEC_ASN1_XTRN,
      offsetof(NSSCMSKeyAgreeRecipientIdentifier, id.issuerAndSN),
      SEC_ASN1_SUB(CERT_IssuerAndSNTemplate),
      NSSCMSKeyAgreeRecipientID_IssuerSN },
    { SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 0,
      offsetof(NSSCMSKeyAgreeRecipientIdentifier, id.recipientKeyIdentifier),
      NSSCMSRecipientKeyIdentifierTemplate,
      NSSCMSKeyAgreeRecipientID_RKeyID },
    { 0 }
};

static const SEC_ASN1Template NSSCMSRecipientEncryptedKeyTemplate[] = {
    { SEC_ASN1_SEQUENCE,
      0, NULL, sizeof(NSSCMSRecipientEncryptedKey) },
    { SEC_ASN1_INLINE,
      offsetof(NSSCMSRecipientEncryptedKey, recipientIdentifier),
      NSSCMSKeyAgreeRecipientIdentifierTemplate },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
      offsetof(NSSCMSRecipientEncryptedKey, encKey),
      SEC_ASN1_SUB(SEC_OctetStringTemplate) },
    { 0 }
};

static const SEC_ASN1Template NSSCMSKeyAgreeRecipientInfoTemplate[] = {
    { SEC_ASN1_SEQUENCE,
      0, NULL, sizeof(NSSCMSKeyAgreeRecipientInfo) },
    { SEC_ASN1_INTEGER,
      offsetof(NSSCMSKeyAgreeRecipientInfo, version) },
    { SEC_ASN1_EXPLICIT | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 0,
      offsetof(NSSCMSKeyAgreeRecipientInfo, originatorIdentifierOrKey),
      NSSCMSOriginatorIdentifierOrKeyTemplate },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_EXPLICIT |
          SEC_ASN1_CONTEXT_SPECIFIC | SEC_ASN1_XTRN | 1,
      offsetof(NSSCMSKeyAgreeRecipientInfo, ukm),
      SEC_ASN1_SUB(SEC_OctetStringTemplate) },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
      offsetof(NSSCMSKeyAgreeRecipientInfo, keyEncAlg),
      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
    { SEC_ASN1_SEQUENCE_OF,
      offsetof(NSSCMSKeyAgreeRecipientInfo, recipientEncryptedKeys),
      NSSCMSRecipientEncryptedKeyTemplate },
    { 0 }
};

/* -----------------------------------------------------------------------------
 * KEK recipient info
 */

static const SEC_ASN1Template NSSCMSKEKIdentifierTemplate[] = {
    { SEC_ASN1_SEQUENCE,
      0, NULL, sizeof(NSSCMSKEKIdentifier) },
    { SEC_ASN1_OCTET_STRING,
      offsetof(NSSCMSKEKIdentifier, keyIdentifier) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_POINTER | SEC_ASN1_XTRN,
      offsetof(NSSCMSKEKIdentifier, date),
      SEC_ASN1_SUB(SEC_GeneralizedTimeTemplate) },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_POINTER | SEC_ASN1_XTRN,
      offsetof(NSSCMSKEKIdentifier, other),
      NSSCMSOtherKeyAttributeTemplate },
    { 0 }
};

static const SEC_ASN1Template NSSCMSKEKRecipientInfoTemplate[] = {
    { SEC_ASN1_SEQUENCE,
      0, NULL, sizeof(NSSCMSKEKRecipientInfo) },
    { SEC_ASN1_INTEGER,
      offsetof(NSSCMSKEKRecipientInfo, version) },
    { SEC_ASN1_INLINE,
      offsetof(NSSCMSKEKRecipientInfo, kekIdentifier),
      NSSCMSKEKIdentifierTemplate },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
      offsetof(NSSCMSKEKRecipientInfo, keyEncAlg),
      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
    { SEC_ASN1_OCTET_STRING,
      offsetof(NSSCMSKEKRecipientInfo, encKey) },
    { 0 }
};

/* -----------------------------------------------------------------------------
 * recipient info
 */
const SEC_ASN1Template NSSCMSRecipientInfoTemplate[] = {
    { SEC_ASN1_CHOICE,
      offsetof(NSSCMSRecipientInfo, recipientInfoType), NULL,
      sizeof(NSSCMSRecipientInfo) },
    { SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 1,
      offsetof(NSSCMSRecipientInfo, ri.keyAgreeRecipientInfo),
      NSSCMSKeyAgreeRecipientInfoTemplate,
      NSSCMSRecipientInfoID_KeyAgree },
    { SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 2,
      offsetof(NSSCMSRecipientInfo, ri.kekRecipientInfo),
      NSSCMSKEKRecipientInfoTemplate,
      NSSCMSRecipientInfoID_KEK },
    { SEC_ASN1_INLINE,
      offsetof(NSSCMSRecipientInfo, ri.keyTransRecipientInfo),
      NSSCMSKeyTransRecipientInfoTemplate,
      NSSCMSRecipientInfoID_KeyTrans },
    { 0 }
};

/* -----------------------------------------------------------------------------
 *
 */

const SEC_ASN1Template NSSCMSDigestedDataTemplate[] = {
    { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
      0, NULL, sizeof(NSSCMSDigestedData) },
    { SEC_ASN1_INTEGER,
      offsetof(NSSCMSDigestedData, version) },
    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
      offsetof(NSSCMSDigestedData, digestAlg),
      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
    { SEC_ASN1_INLINE,
      offsetof(NSSCMSDigestedData, contentInfo),
      NSSCMSEncapsulatedContentInfoTemplate },
    { SEC_ASN1_OCTET_STRING,
      offsetof(NSSCMSDigestedData, digest) },
    { 0 }
};

const SEC_ASN1Template NSS_PointerToCMSDigestedDataTemplate[] = {
    { SEC_ASN1_POINTER, 0, NSSCMSDigestedDataTemplate }
};

const SEC_ASN1Template NSSCMSEncryptedDataTemplate[] = {
    { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
      0, NULL, sizeof(NSSCMSEncryptedData) },
    { SEC_ASN1_INTEGER,
      offsetof(NSSCMSEncryptedData, version) },
    { SEC_ASN1_INLINE,
      offsetof(NSSCMSEncryptedData, contentInfo),
      NSSCMSEncryptedContentInfoTemplate },
    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 1,
      offsetof(NSSCMSEncryptedData, unprotectedAttr),
      nss_cms_set_of_attribute_template },
    { 0 }
};

const SEC_ASN1Template NSS_PointerToCMSEncryptedDataTemplate[] = {
    { SEC_ASN1_POINTER, 0, NSSCMSEncryptedDataTemplate }
};

const SEC_ASN1Template NSSCMSGenericWrapperDataTemplate[] = {
    { SEC_ASN1_INLINE,
      offsetof(NSSCMSGenericWrapperData, contentInfo),
      NSSCMSEncapsulatedContentInfoTemplate },
};

SEC_ASN1_CHOOSER_IMPLEMENT(NSSCMSGenericWrapperDataTemplate)

const SEC_ASN1Template NSS_PointerToCMSGenericWrapperDataTemplate[] = {
    { SEC_ASN1_POINTER, 0, NSSCMSGenericWrapperDataTemplate }
};

SEC_ASN1_CHOOSER_IMPLEMENT(NSS_PointerToCMSGenericWrapperDataTemplate)

/* -----------------------------------------------------------------------------
 *
 */
static const SEC_ASN1Template *
nss_cms_choose_content_template(void *src_or_dest, PRBool encoding)
{
    const SEC_ASN1Template *theTemplate;
    NSSCMSContentInfo *cinfo;
    SECOidTag type;

    PORT_Assert(src_or_dest != NULL);
    if (src_or_dest == NULL)
        return NULL;

    cinfo = (NSSCMSContentInfo *)src_or_dest;
    type = NSS_CMSContentInfo_GetContentTypeTag(cinfo);
    switch (type) {
        default:
            theTemplate = NSS_CMSType_GetTemplate(type);
            break;
        case SEC_OID_PKCS7_DATA:
            theTemplate = SEC_ASN1_GET(SEC_PointerToOctetStringTemplate);
            break;
        case SEC_OID_PKCS7_SIGNED_DATA:
            theTemplate = NSS_PointerToCMSSignedDataTemplate;
            break;
        case SEC_OID_PKCS7_ENVELOPED_DATA:
            theTemplate = NSS_PointerToCMSEnvelopedDataTemplate;
            break;
        case SEC_OID_PKCS7_DIGESTED_DATA:
            theTemplate = NSS_PointerToCMSDigestedDataTemplate;
            break;
        case SEC_OID_PKCS7_ENCRYPTED_DATA:
            theTemplate = NSS_PointerToCMSEncryptedDataTemplate;
            break;
    }
    return theTemplate;
}