How do I get the CMS encoder in mozilla's NSS 3.12.7 to use definite
encodings on constructed types as well as data. Here is what I am
trying now (in the least invasive way possible.)
/* Create memory pool (aka an arena.) */
PLArenaPool * arena = PORT_NewArena(4096);
/* Create the CMS Message object */
fprintf(stderr, "Create the CMS Message object\n");
NSSCMSMessage * cmsMessage = NSS_CMSMessage_Create(arena);
NSSCMSContentInfo * cinfo = NSS_CMSMessage_GetContentInfo(cmsMessage);
/* Create a DigestedData object who's parent is cmsMessage */
fprintf(stderr, "Create a DigestedData object who's parent is cmsMessage\n");
SECAlgorithmID * id = CreateDigestAlgorithmID(arena, SEC_OID_SHA1);
NSSCMSDigestedData * digestedData =
NSS_CMSDigestedData_Create(cmsMessage, id);
NSSCMSContentInfo * dcinfo =
NSS_CMSDigestedData_GetContentInfo(digestedData);
/* Tell the DigestedData object to include the content (not detached.) */
fprintf(stderr, "Tell the DigestedData object to include the content
(Length: %d)\n", in_len);
SECItem * in_data = CreateSECItemString(arena, in, in_len);
NSS_CMSContentInfo_SetContent_Data(cmsMessage, dcinfo, in_data, PR_FALSE);
/* Put digestedData into cmsMessage's contentInfo section */
fprintf(stderr, "Put digestedData into cmsMessage's contentInfo section\n");
NSS_CMSContentInfo_SetContent_DigestedData(cmsMessage, cinfo, digestedData);
/* Encode input data to DER format with following parameters */
fprintf(stderr, "Encode input data to DER format\n");
SECItem * encodedOutput = (SECItem*)PORT_ArenaZAlloc(arena, sizeof(SECItem));
NSSCMSEncoderContext * ecx =
NSS_CMSEncoder_Start(cmsMessage, NULL, NULL, encodedOutput, arena,
NULL, NULL, NULL, NULL, NULL, NULL);
fprintf(stderr, "NSS_CMSEncoder_Update\n");
NSS_CMSEncoder_Update(ecx, NULL, 0);
fprintf(stderr, "NSS_CMSEncoder_Finish\n");
NSS_CMSEncoder_Finish(ecx);
The output has the sequence fields indefinite. Researching into the
code, I've found (in secasn1e.c)
/* The !isString test below is apparently intended to ensure that all
** constructed types receive indefinite length encoding.
*/
indefinite = (PRBool)
(state->top->streaming && state->may_stream &&
(state->top->from_buf || !state->is_string));
which leads me to believe there is no way to do this easily. If know
one knows of an easy way to handle this,
I'll probably submit bug/patch, just thought this was suppose to be a
std feature of CMS encoders?
Thanks for any help!
Vinnie Agriesti
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