/*
* SecCmsContentInfoGetInnerContent - get pointer to innermost content
*
* this is typically only called by SecCmsMessageGetContent()
*/
CSSM_DATA_PTR
SecCmsContentInfoGetInnerContent(SecCmsContentInfoRef cinfo)
{
SECOidTag tag;
for(;;) {
tag = SecCmsContentInfoGetContentTypeTag(cinfo);
switch (tag) {
case SEC_OID_PKCS7_DATA:
case SEC_OID_OTHER:
/* end of recursion - every message has to have a data cinfo */
return cinfo->content.data;
case SEC_OID_PKCS7_DIGESTED_DATA:
case SEC_OID_PKCS7_ENCRYPTED_DATA:
case SEC_OID_PKCS7_ENVELOPED_DATA:
case SEC_OID_PKCS7_SIGNED_DATA:
cinfo = SecCmsContentInfoGetChildContentInfo(cinfo);
if (cinfo == NULL) {
return NULL;
}
/* else recurse */
break;
case SEC_OID_PKCS9_ID_CT_TSTInfo:
/* end of recursion - every message has to have a data cinfo */
return cinfo->rawContent;
default:
PORT_Assert(0);
return NULL;
}
}
/* NOT REACHED */
return NULL;
}
/*
* SecCmsMessageContentLevel - find content level #n
*
* CMS data content objects do not count.
*/
SecCmsContentInfoRef
SecCmsMessageContentLevel(SecCmsMessageRef cmsg, int n)
{
int count = 0;
SecCmsContentInfoRef cinfo;
/* walk down the chain of contentinfos */
for (cinfo = &(cmsg->contentInfo); cinfo != NULL && count < n; cinfo = SecCmsContentInfoGetChildContentInfo(cinfo)) {
count++;
}
return cinfo;
}
/*
* SecCmsMessageContentLevelCount - count number of levels of CMS content objects in this message
*
* CMS data content objects do not count.
*/
int
SecCmsMessageContentLevelCount(SecCmsMessageRef cmsg)
{
int count = 0;
SecCmsContentInfoRef cinfo;
/* walk down the chain of contentinfos */
for (cinfo = &(cmsg->contentInfo); cinfo != NULL; ) {
count++;
cinfo = SecCmsContentInfoGetChildContentInfo(cinfo);
}
return count;
}
/*
* SecCmsMessageContainsCertsOrCrls - see if message contains certs along the way
*/
Boolean
SecCmsMessageContainsCertsOrCrls(SecCmsMessageRef cmsg)
{
SecCmsContentInfoRef cinfo;
/* descend into CMS message */
for (cinfo = &(cmsg->contentInfo); cinfo != NULL; cinfo = SecCmsContentInfoGetChildContentInfo(cinfo)) {
if (SecCmsContentInfoGetContentTypeTag(cinfo) != SEC_OID_PKCS7_SIGNED_DATA)
continue; /* next level */
if (SecCmsSignedDataContainsCertsOrCrls(cinfo->content.signedData))
return PR_TRUE;
}
return PR_FALSE;
}
/*
* SecCmsMessageIsEncrypted - see if message contains a encrypted submessage
*/
Boolean
SecCmsMessageIsEncrypted(SecCmsMessageRef cmsg)
{
SecCmsContentInfoRef cinfo;
/* walk down the chain of contentinfos */
for (cinfo = &(cmsg->contentInfo); cinfo != NULL; cinfo = SecCmsContentInfoGetChildContentInfo(cinfo))
{
switch (SecCmsContentInfoGetContentTypeTag(cinfo)) {
case SEC_OID_PKCS7_ENVELOPED_DATA:
case SEC_OID_PKCS7_ENCRYPTED_DATA:
return PR_TRUE;
default:
break;
}
}
return PR_FALSE;
}
/*
* SecCmsMessageIsSigned - see if message contains a signed submessage
*
* If the CMS message has a SignedData with a signature (not just a SignedData)
* return true; false otherwise. This can/should be called before calling
* VerifySignature, which will always indicate failure if no signature is
* present, but that does not mean there even was a signature!
* Note that the content itself can be empty (detached content was sent
* another way); it is the presence of the signature that matters.
*/
Boolean
SecCmsMessageIsSigned(SecCmsMessageRef cmsg)
{
SecCmsContentInfoRef cinfo;
/* walk down the chain of contentinfos */
for (cinfo = &(cmsg->contentInfo); cinfo != NULL; cinfo = SecCmsContentInfoGetChildContentInfo(cinfo))
{
switch (SecCmsContentInfoGetContentTypeTag(cinfo)) {
case SEC_OID_PKCS7_SIGNED_DATA:
if (!SecCmsArrayIsEmpty((void **)cinfo->content.signedData->signerInfos))
return PR_TRUE;
break;
default:
break;
}
}
return PR_FALSE;
}
