SECItem *
NSS_CMSContentInfo_GetInnerContent(NSSCMSContentInfo *cinfo)
{
NSSCMSContentInfo *ccinfo;
SECOidTag tag;
SECItem *pItem = NULL;
if (cinfo == NULL) {
return NULL;
}
tag = NSS_CMSContentInfo_GetContentTypeTag(cinfo);
if (NSS_CMSType_IsData(tag)) {
pItem = cinfo->content.data;
} else if (NSS_CMSType_IsWrapper(tag)) {
ccinfo = NSS_CMSContentInfo_GetChildContentInfo(cinfo);
if (ccinfo != NULL) {
pItem = NSS_CMSContentInfo_GetContent(ccinfo);
}
} else {
PORT_Assert(0);
}
return pItem;
}
/*
* NSS_CMSMessage_ContentLevel - find content level #n
*
* CMS data content objects do not count.
*/
NSSCMSContentInfo *
NSS_CMSMessage_ContentLevel(NSSCMSMessage *cmsg, int n)
{
int count = 0;
NSSCMSContentInfo *cinfo;
/* walk down the chain of contentinfos */
for (cinfo = &(cmsg->contentInfo); cinfo != NULL && count < n; cinfo = NSS_CMSContentInfo_GetChildContentInfo(cinfo)) {
count++;
}
return cinfo;
}
/*
* NSS_CMSMessage_ContentLevelCount - count number of levels of CMS content objects in this message
*
* CMS data content objects do not count.
*/
int
NSS_CMSMessage_ContentLevelCount(NSSCMSMessage *cmsg)
{
int count = 0;
NSSCMSContentInfo *cinfo;
/* walk down the chain of contentinfos */
for (cinfo = &(cmsg->contentInfo); cinfo != NULL; ) {
count++;
cinfo = NSS_CMSContentInfo_GetChildContentInfo(cinfo);
}
return count;
}
/*
* NSS_CMSMessage_ContainsCertsOrCrls - see if message contains certs along the way
*/
PRBool
NSS_CMSMessage_ContainsCertsOrCrls(NSSCMSMessage *cmsg)
{
NSSCMSContentInfo *cinfo;
/* descend into CMS message */
for (cinfo = &(cmsg->contentInfo); cinfo != NULL; cinfo = NSS_CMSContentInfo_GetChildContentInfo(cinfo)) {
if (!NSS_CMSType_IsData(NSS_CMSContentInfo_GetContentTypeTag(cinfo)))
continue; /* next level */
if (NSS_CMSSignedData_ContainsCertsOrCrls(cinfo->content.signedData))
return PR_TRUE;
/* callback here for generic wrappers? */
}
return PR_FALSE;
}
/*
* NSS_CMSMessage_IsEncrypted - see if message contains a encrypted submessage
*/
PRBool
NSS_CMSMessage_IsEncrypted(NSSCMSMessage *cmsg)
{
NSSCMSContentInfo *cinfo;
/* walk down the chain of contentinfos */
for (cinfo = &(cmsg->contentInfo); cinfo != NULL; cinfo = NSS_CMSContentInfo_GetChildContentInfo(cinfo))
{
switch (NSS_CMSContentInfo_GetContentTypeTag(cinfo)) {
case SEC_OID_PKCS7_ENVELOPED_DATA:
case SEC_OID_PKCS7_ENCRYPTED_DATA:
return PR_TRUE;
default:
/* callback here for generic wrappers? */
break;
}
}
return PR_FALSE;
}
/*
* NSS_CMSMessage_IsSigned - 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.
*/
PRBool
NSS_CMSMessage_IsSigned(NSSCMSMessage *cmsg)
{
NSSCMSContentInfo *cinfo;
/* walk down the chain of contentinfos */
for (cinfo = &(cmsg->contentInfo); cinfo != NULL; cinfo = NSS_CMSContentInfo_GetChildContentInfo(cinfo))
{
switch (NSS_CMSContentInfo_GetContentTypeTag(cinfo)) {
case SEC_OID_PKCS7_SIGNED_DATA:
if (!NSS_CMSArray_IsEmpty((void **)cinfo->content.signedData->signerInfos))
return PR_TRUE;
break;
default:
/* callback here for generic wrappers? */
break;
}
}
return PR_FALSE;
}
