SecCmsMessageRef Download::GetCmsMessageFromData (CFDataRef data)
{
// setup decoding
SecCmsDecoderRef decoderContext;
int result = SecCmsDecoderCreate (NULL, NULL, NULL, NULL, NULL, NULL, NULL, &decoderContext);
if (result)
{
MacOSError::throwMe (errSecureDownloadInvalidTicket);
}
result = SecCmsDecoderUpdate (decoderContext, CFDataGetBytePtr (data), CFDataGetLength (data));
if (result)
{
SecCmsDecoderDestroy(decoderContext);
MacOSError::throwMe (errSecureDownloadInvalidTicket);
}
SecCmsMessageRef message;
result = SecCmsDecoderFinish (decoderContext, &message);
if (result)
{
MacOSError::throwMe (errSecureDownloadInvalidTicket);
}
return message;
}
/*
* Feed raw bytes of the message to be decoded into the decoder. Can be called
* multiple times.
*/
OSStatus CMSDecoderUpdateMessage(
CMSDecoderRef cmsDecoder,
const void *msgBytes,
size_t msgBytesLen)
{
if(cmsDecoder == NULL) {
return errSecParam;
}
OSStatus ortn;
switch(cmsDecoder->decState) {
case DS_Init:
/* First time through; set up */
ASSERT(cmsDecoder->decoder == NULL);
ASSERT(cmsDecoder->arena == NULL);
ortn = SecArenaPoolCreate(1024, &cmsDecoder->arena);
if(ortn) {
return cmsRtnToOSStatus(ortn);
}
ortn = SecCmsDecoderCreate(cmsDecoder->arena,
NULL, NULL, NULL, NULL, NULL, NULL, &cmsDecoder->decoder);
if(ortn) {
ortn = cmsRtnToOSStatus(ortn);
CSSM_PERROR("SecCmsDecoderCreate", ortn);
return ortn;
}
cmsDecoder->decState = DS_Updating;
break;
case DS_Updating:
ASSERT(cmsDecoder->decoder != NULL);
break;
case DS_Final:
/* Too late for another update */
return errSecParam;
default:
dprintf("CMSDecoderUpdateMessage: bad decState\n");
return errSecInternalComponent;
}
/* FIXME - CFIndex same size as size_t on 64bit? */
ortn = SecCmsDecoderUpdate(cmsDecoder->decoder, msgBytes, (CFIndex)msgBytesLen);
if(ortn) {
ortn = cmsRtnToOSStatus(ortn, errSecUnknownFormat);
CSSM_PERROR("SecCmsDecoderUpdate", ortn);
}
return ortn;
}