mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-11-11 10:20:19 +01:00
44b7f056d9
bug1001332, 56b691c003ad, bug1086145, bug1054069, bug1155922, bug991783, bug1125025, bug1162521, bug1162644, bug1132941, bug1164364, bug1166205, bug1166163, bug1166515, bug1138554, bug1167046, bug1167043, bug1169451, bug1172128, bug1170322, bug102794, bug1128184, bug557830, bug1174648, bug1180244, bug1177784, bug1173413, bug1169174, bug1084669, bug951455, bug1183395, bug1177430, bug1183827, bug1160139, bug1154106, bug1142209, bug1185033, bug1193467, bug1182667(with sha512 changes backed out, which breaks VC6 compilation), bug1158489, bug337796
744 lines
24 KiB
C
744 lines
24 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* CMS encoding.
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*/
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#include "cmslocal.h"
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#include "cert.h"
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#include "key.h"
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#include "secasn1.h"
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#include "secoid.h"
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#include "secitem.h"
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#include "pk11func.h"
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#include "secerr.h"
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struct nss_cms_encoder_output {
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NSSCMSContentCallback outputfn;
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void *outputarg;
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PLArenaPool *destpoolp;
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SECItem *dest;
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};
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struct NSSCMSEncoderContextStr {
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SEC_ASN1EncoderContext * ecx; /* ASN.1 encoder context */
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PRBool ecxupdated; /* true if data was handed in */
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NSSCMSMessage * cmsg; /* pointer to the root message */
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SECOidTag type; /* type tag of the current content */
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NSSCMSContent content; /* pointer to current content */
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struct nss_cms_encoder_output output; /* output function */
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int error; /* error code */
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NSSCMSEncoderContext * childp7ecx; /* link to child encoder context */
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};
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static SECStatus nss_cms_before_data(NSSCMSEncoderContext *p7ecx);
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static SECStatus nss_cms_after_data(NSSCMSEncoderContext *p7ecx);
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static SECStatus nss_cms_encoder_update(NSSCMSEncoderContext *p7ecx, const char *data, unsigned long len);
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static SECStatus nss_cms_encoder_work_data(NSSCMSEncoderContext *p7ecx, SECItem *dest,
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const unsigned char *data, unsigned long len,
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PRBool final, PRBool innermost);
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extern const SEC_ASN1Template NSSCMSMessageTemplate[];
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/*
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* The little output function that the ASN.1 encoder calls to hand
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* us bytes which we in turn hand back to our caller (via the callback
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* they gave us).
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*/
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static void
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nss_cms_encoder_out(void *arg, const char *buf, unsigned long len,
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int depth, SEC_ASN1EncodingPart data_kind)
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{
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struct nss_cms_encoder_output *output = (struct nss_cms_encoder_output *)arg;
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unsigned char *dest;
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unsigned long offset;
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#ifdef CMSDEBUG
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int i;
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const char *data_name = "unknown";
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switch (data_kind) {
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case SEC_ASN1_Identifier:
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data_name = "identifier";
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break;
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case SEC_ASN1_Length:
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data_name = "length";
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break;
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case SEC_ASN1_Contents:
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data_name = "contents";
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break;
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case SEC_ASN1_EndOfContents:
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data_name = "end-of-contents";
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break;
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}
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fprintf(stderr, "kind = %s, depth = %d, len = %d\n", data_name, depth, len);
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for (i=0; i < len; i++) {
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fprintf(stderr, " %02x%s", (unsigned int)buf[i] & 0xff, ((i % 16) == 15) ? "\n" : "");
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}
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if ((i % 16) != 0)
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fprintf(stderr, "\n");
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#endif
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if (output->outputfn != NULL)
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/* call output callback with DER data */
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output->outputfn(output->outputarg, buf, len);
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if (output->dest != NULL) {
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/* store DER data in SECItem */
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offset = output->dest->len;
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if (offset == 0) {
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dest = (unsigned char *)PORT_ArenaAlloc(output->destpoolp, len);
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} else {
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dest = (unsigned char *)PORT_ArenaGrow(output->destpoolp,
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output->dest->data,
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output->dest->len,
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output->dest->len + len);
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}
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if (dest == NULL)
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/* oops */
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return;
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output->dest->data = dest;
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output->dest->len += len;
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/* copy it in */
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PORT_Memcpy(output->dest->data + offset, buf, len);
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}
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}
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/*
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* nss_cms_encoder_notify - ASN.1 encoder callback
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*
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* this function is called by the ASN.1 encoder before and after the encoding of
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* every object. here, it is used to keep track of data structures, set up
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* encryption and/or digesting and possibly set up child encoders.
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*/
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static void
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nss_cms_encoder_notify(void *arg, PRBool before, void *dest, int depth)
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{
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NSSCMSEncoderContext *p7ecx;
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NSSCMSContentInfo *rootcinfo, *cinfo;
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PRBool after = !before;
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SECOidTag childtype;
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SECItem *item;
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p7ecx = (NSSCMSEncoderContext *)arg;
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PORT_Assert(p7ecx != NULL);
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rootcinfo = &(p7ecx->cmsg->contentInfo);
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#ifdef CMSDEBUG
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fprintf(stderr, "%6.6s, dest = 0x%08x, depth = %d\n", before ? "before" : "after", dest, depth);
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#endif
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/*
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* Watch for the content field, at which point we want to instruct
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* the ASN.1 encoder to start taking bytes from the buffer.
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*/
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if (NSS_CMSType_IsData(p7ecx->type)) {
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cinfo = NSS_CMSContent_GetContentInfo(p7ecx->content.pointer, p7ecx->type);
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if (before && dest == &(cinfo->rawContent)) {
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/* just set up encoder to grab from user - no encryption or digesting */
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if ((item = cinfo->content.data) != NULL)
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(void)nss_cms_encoder_work_data(p7ecx, NULL, item->data, item->len, PR_TRUE, PR_TRUE);
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else
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SEC_ASN1EncoderSetTakeFromBuf(p7ecx->ecx);
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SEC_ASN1EncoderClearNotifyProc(p7ecx->ecx); /* no need to get notified anymore */
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}
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} else if (NSS_CMSType_IsWrapper(p7ecx->type)) {
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/* when we know what the content is, we encode happily until we reach the inner content */
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cinfo = NSS_CMSContent_GetContentInfo(p7ecx->content.pointer, p7ecx->type);
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childtype = NSS_CMSContentInfo_GetContentTypeTag(cinfo);
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if (after && dest == &(cinfo->contentType)) {
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/* we're right before encoding the data (if we have some or not) */
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/* (for encrypted data, we're right before the contentEncAlg which may change */
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/* in nss_cms_before_data because of IV calculation when setting up encryption) */
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if (nss_cms_before_data(p7ecx) != SECSuccess)
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p7ecx->error = PORT_GetError();
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}
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if (before && dest == &(cinfo->rawContent)) {
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if (p7ecx->childp7ecx == NULL) {
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if ((NSS_CMSType_IsData(childtype) && (item = cinfo->content.data) != NULL)) {
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/* we are the innermost non-data and we have data - feed it in */
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(void)nss_cms_encoder_work_data(p7ecx, NULL, item->data, item->len, PR_TRUE, PR_TRUE);
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} else {
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/* else we'll have to get data from user */
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SEC_ASN1EncoderSetTakeFromBuf(p7ecx->ecx);
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}
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} else {
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/* if we have a nested encoder, wait for its data */
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SEC_ASN1EncoderSetTakeFromBuf(p7ecx->ecx);
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}
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}
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if (after && dest == &(cinfo->rawContent)) {
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if (nss_cms_after_data(p7ecx) != SECSuccess)
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p7ecx->error = PORT_GetError();
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SEC_ASN1EncoderClearNotifyProc(p7ecx->ecx); /* no need to get notified anymore */
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}
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} else {
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/* we're still in the root message */
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if (after && dest == &(rootcinfo->contentType)) {
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/* got the content type OID now - so find out the type tag */
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p7ecx->type = NSS_CMSContentInfo_GetContentTypeTag(rootcinfo);
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/* set up a pointer to our current content */
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p7ecx->content = rootcinfo->content;
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}
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}
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}
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/*
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* nss_cms_before_data - setup the current encoder to receive data
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*/
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static SECStatus
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nss_cms_before_data(NSSCMSEncoderContext *p7ecx)
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{
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SECStatus rv;
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SECOidTag childtype;
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NSSCMSContentInfo *cinfo;
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NSSCMSEncoderContext *childp7ecx;
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const SEC_ASN1Template *template;
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/* call _Encode_BeforeData handlers */
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switch (p7ecx->type) {
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case SEC_OID_PKCS7_SIGNED_DATA:
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/* we're encoding a signedData, so set up the digests */
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rv = NSS_CMSSignedData_Encode_BeforeData(p7ecx->content.signedData);
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break;
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case SEC_OID_PKCS7_DIGESTED_DATA:
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/* we're encoding a digestedData, so set up the digest */
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rv = NSS_CMSDigestedData_Encode_BeforeData(p7ecx->content.digestedData);
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break;
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case SEC_OID_PKCS7_ENVELOPED_DATA:
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rv = NSS_CMSEnvelopedData_Encode_BeforeData(p7ecx->content.envelopedData);
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break;
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case SEC_OID_PKCS7_ENCRYPTED_DATA:
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rv = NSS_CMSEncryptedData_Encode_BeforeData(p7ecx->content.encryptedData);
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break;
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default:
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if (NSS_CMSType_IsWrapper(p7ecx->type)) {
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rv = NSS_CMSGenericWrapperData_Encode_BeforeData(p7ecx->type, p7ecx->content.genericData);
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} else {
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rv = SECFailure;
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}
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}
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if (rv != SECSuccess)
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return SECFailure;
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/* ok, now we have a pointer to cinfo */
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/* find out what kind of data is encapsulated */
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cinfo = NSS_CMSContent_GetContentInfo(p7ecx->content.pointer, p7ecx->type);
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childtype = NSS_CMSContentInfo_GetContentTypeTag(cinfo);
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if (NSS_CMSType_IsWrapper(childtype)) {
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/* in these cases, we need to set up a child encoder! */
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/* create new encoder context */
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childp7ecx = PORT_ZAlloc(sizeof(NSSCMSEncoderContext));
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if (childp7ecx == NULL)
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return SECFailure;
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/* the CHILD encoder needs to hand its encoded data to the CURRENT encoder
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* (which will encrypt and/or digest it)
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* this needs to route back into our update function
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* which finds the lowest encoding context & encrypts and computes digests */
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childp7ecx->type = childtype;
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childp7ecx->content = cinfo->content;
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/* use the non-recursive update function here, of course */
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childp7ecx->output.outputfn = (NSSCMSContentCallback)nss_cms_encoder_update;
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childp7ecx->output.outputarg = p7ecx;
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childp7ecx->output.destpoolp = NULL;
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childp7ecx->output.dest = NULL;
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childp7ecx->cmsg = p7ecx->cmsg;
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childp7ecx->ecxupdated = PR_FALSE;
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childp7ecx->childp7ecx = NULL;
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template = NSS_CMSUtil_GetTemplateByTypeTag(childtype);
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if (template == NULL)
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goto loser; /* cannot happen */
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/* now initialize the data for encoding the first third */
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switch (childp7ecx->type) {
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case SEC_OID_PKCS7_SIGNED_DATA:
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rv = NSS_CMSSignedData_Encode_BeforeStart(cinfo->content.signedData);
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break;
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case SEC_OID_PKCS7_ENVELOPED_DATA:
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rv = NSS_CMSEnvelopedData_Encode_BeforeStart(cinfo->content.envelopedData);
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break;
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case SEC_OID_PKCS7_DIGESTED_DATA:
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rv = NSS_CMSDigestedData_Encode_BeforeStart(cinfo->content.digestedData);
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break;
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case SEC_OID_PKCS7_ENCRYPTED_DATA:
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rv = NSS_CMSEncryptedData_Encode_BeforeStart(cinfo->content.encryptedData);
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break;
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default:
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rv = NSS_CMSGenericWrapperData_Encode_BeforeStart(childp7ecx->type, cinfo->content.genericData);
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break;
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}
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if (rv != SECSuccess)
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goto loser;
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/*
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* Initialize the BER encoder.
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*/
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childp7ecx->ecx = SEC_ASN1EncoderStart(cinfo->content.pointer, template,
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nss_cms_encoder_out, &(childp7ecx->output));
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if (childp7ecx->ecx == NULL)
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goto loser;
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/*
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* Indicate that we are streaming. We will be streaming until we
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* get past the contents bytes.
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*/
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if (!cinfo->privateInfo || !cinfo->privateInfo->dontStream)
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SEC_ASN1EncoderSetStreaming(childp7ecx->ecx);
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/*
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* The notify function will watch for the contents field.
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*/
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p7ecx->childp7ecx = childp7ecx;
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SEC_ASN1EncoderSetNotifyProc(childp7ecx->ecx, nss_cms_encoder_notify, childp7ecx);
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/* please note that we are NOT calling SEC_ASN1EncoderUpdate here to kick off the */
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/* encoding process - we'll do that from the update function instead */
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/* otherwise we'd be encoding data from a call of the notify function of the */
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/* parent encoder (which would not work) */
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} else if (NSS_CMSType_IsData(childtype)) {
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p7ecx->childp7ecx = NULL;
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} else {
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/* we do not know this type */
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p7ecx->error = SEC_ERROR_BAD_DER;
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}
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return SECSuccess;
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loser:
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if (childp7ecx) {
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if (childp7ecx->ecx)
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SEC_ASN1EncoderFinish(childp7ecx->ecx);
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PORT_Free(childp7ecx);
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p7ecx->childp7ecx = NULL;
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}
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return SECFailure;
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}
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static SECStatus
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nss_cms_after_data(NSSCMSEncoderContext *p7ecx)
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{
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SECStatus rv = SECFailure;
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switch (p7ecx->type) {
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case SEC_OID_PKCS7_SIGNED_DATA:
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/* this will finish the digests and sign */
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rv = NSS_CMSSignedData_Encode_AfterData(p7ecx->content.signedData);
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break;
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case SEC_OID_PKCS7_ENVELOPED_DATA:
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rv = NSS_CMSEnvelopedData_Encode_AfterData(p7ecx->content.envelopedData);
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break;
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case SEC_OID_PKCS7_DIGESTED_DATA:
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rv = NSS_CMSDigestedData_Encode_AfterData(p7ecx->content.digestedData);
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break;
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case SEC_OID_PKCS7_ENCRYPTED_DATA:
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rv = NSS_CMSEncryptedData_Encode_AfterData(p7ecx->content.encryptedData);
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break;
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default:
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if (NSS_CMSType_IsWrapper(p7ecx->type)) {
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rv = NSS_CMSGenericWrapperData_Encode_AfterData(p7ecx->type, p7ecx->content.genericData);
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} else {
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rv = SECFailure;
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}
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break;
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}
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return rv;
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}
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/*
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* nss_cms_encoder_work_data - process incoming data
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*
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* (from the user or the next encoding layer)
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* Here, we need to digest and/or encrypt, then pass it on
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*/
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static SECStatus
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nss_cms_encoder_work_data(NSSCMSEncoderContext *p7ecx, SECItem *dest,
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const unsigned char *data, unsigned long len,
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PRBool final, PRBool innermost)
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{
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unsigned char *buf = NULL;
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SECStatus rv;
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NSSCMSContentInfo *cinfo;
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rv = SECSuccess; /* may as well be optimistic */
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/*
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* We should really have data to process, or we should be trying
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* to finish/flush the last block. (This is an overly paranoid
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* check since all callers are in this file and simple inspection
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* proves they do it right. But it could find a bug in future
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* modifications/development, that is why it is here.)
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*/
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PORT_Assert ((data != NULL && len) || final);
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/* we got data (either from the caller, or from a lower level encoder) */
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cinfo = NSS_CMSContent_GetContentInfo(p7ecx->content.pointer, p7ecx->type);
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if (!cinfo) {
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/* The original programmer didn't expect this to happen */
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p7ecx->error = SEC_ERROR_LIBRARY_FAILURE;
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return SECFailure;
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}
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/* Update the running digest. */
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if (len && cinfo->privateInfo && cinfo->privateInfo->digcx != NULL)
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NSS_CMSDigestContext_Update(cinfo->privateInfo->digcx, data, len);
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/* Encrypt this chunk. */
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if (cinfo->privateInfo && cinfo->privateInfo->ciphcx != NULL) {
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unsigned int inlen; /* length of data being encrypted */
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unsigned int outlen; /* length of encrypted data */
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unsigned int buflen; /* length available for encrypted data */
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inlen = len;
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buflen = NSS_CMSCipherContext_EncryptLength(cinfo->privateInfo->ciphcx, inlen, final);
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if (buflen == 0) {
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/*
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* No output is expected, but the input data may be buffered
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* so we still have to call Encrypt.
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*/
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rv = NSS_CMSCipherContext_Encrypt(cinfo->privateInfo->ciphcx, NULL, NULL, 0,
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data, inlen, final);
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if (final) {
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len = 0;
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goto done;
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}
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return rv;
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}
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if (dest != NULL)
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buf = (unsigned char*)PORT_ArenaAlloc(p7ecx->cmsg->poolp, buflen);
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else
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buf = (unsigned char*)PORT_Alloc(buflen);
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if (buf == NULL) {
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rv = SECFailure;
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} else {
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rv = NSS_CMSCipherContext_Encrypt(cinfo->privateInfo->ciphcx, buf, &outlen, buflen,
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data, inlen, final);
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data = buf;
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len = outlen;
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}
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if (rv != SECSuccess)
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/* encryption or malloc failed? */
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return rv;
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}
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/*
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* at this point (data,len) has everything we'd like to give to the CURRENT encoder
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* (which will encode it, then hand it back to the user or the parent encoder)
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* We don't encode the data if we're innermost and we're told not to include the data
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*/
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if (p7ecx->ecx != NULL && len && (!innermost || cinfo->rawContent != cinfo->content.pointer))
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rv = SEC_ASN1EncoderUpdate(p7ecx->ecx, (const char *)data, len);
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done:
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|
|
if (cinfo->privateInfo && cinfo->privateInfo->ciphcx != NULL) {
|
|
if (dest != NULL) {
|
|
dest->data = buf;
|
|
dest->len = len;
|
|
} else if (buf != NULL) {
|
|
PORT_Free (buf);
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* nss_cms_encoder_update - deliver encoded data to the next higher level
|
|
*
|
|
* no recursion here because we REALLY want to end up at the next higher encoder!
|
|
*/
|
|
static SECStatus
|
|
nss_cms_encoder_update(NSSCMSEncoderContext *p7ecx, const char *data, unsigned long len)
|
|
{
|
|
/* XXX Error handling needs help. Return what? Do "Finish" on failure? */
|
|
return nss_cms_encoder_work_data (p7ecx, NULL, (const unsigned char *)data, len, PR_FALSE, PR_FALSE);
|
|
}
|
|
|
|
/*
|
|
* NSS_CMSEncoder_Start - set up encoding of a CMS message
|
|
*
|
|
* "cmsg" - message to encode
|
|
* "outputfn", "outputarg" - callback function for delivery of DER-encoded output
|
|
* will not be called if NULL.
|
|
* "dest" - if non-NULL, pointer to SECItem that will hold the DER-encoded output
|
|
* "destpoolp" - pool to allocate DER-encoded output in
|
|
* "pwfn", pwfn_arg" - callback function for getting token password
|
|
* "decrypt_key_cb", "decrypt_key_cb_arg" - callback function for getting bulk key for encryptedData
|
|
* "detached_digestalgs", "detached_digests" - digests from detached content
|
|
*/
|
|
NSSCMSEncoderContext *
|
|
NSS_CMSEncoder_Start(NSSCMSMessage *cmsg,
|
|
NSSCMSContentCallback outputfn, void *outputarg,
|
|
SECItem *dest, PLArenaPool *destpoolp,
|
|
PK11PasswordFunc pwfn, void *pwfn_arg,
|
|
NSSCMSGetDecryptKeyCallback decrypt_key_cb, void *decrypt_key_cb_arg,
|
|
SECAlgorithmID **detached_digestalgs, SECItem **detached_digests)
|
|
{
|
|
NSSCMSEncoderContext *p7ecx;
|
|
SECStatus rv;
|
|
NSSCMSContentInfo *cinfo;
|
|
SECOidTag tag;
|
|
|
|
NSS_CMSMessage_SetEncodingParams(cmsg, pwfn, pwfn_arg, decrypt_key_cb, decrypt_key_cb_arg,
|
|
detached_digestalgs, detached_digests);
|
|
|
|
p7ecx = (NSSCMSEncoderContext *)PORT_ZAlloc(sizeof(NSSCMSEncoderContext));
|
|
if (p7ecx == NULL) {
|
|
PORT_SetError(SEC_ERROR_NO_MEMORY);
|
|
return NULL;
|
|
}
|
|
|
|
p7ecx->cmsg = cmsg;
|
|
p7ecx->output.outputfn = outputfn;
|
|
p7ecx->output.outputarg = outputarg;
|
|
p7ecx->output.dest = dest;
|
|
p7ecx->output.destpoolp = destpoolp;
|
|
p7ecx->type = SEC_OID_UNKNOWN;
|
|
|
|
cinfo = NSS_CMSMessage_GetContentInfo(cmsg);
|
|
|
|
tag = NSS_CMSContentInfo_GetContentTypeTag(cinfo);
|
|
switch (tag) {
|
|
case SEC_OID_PKCS7_SIGNED_DATA:
|
|
rv = NSS_CMSSignedData_Encode_BeforeStart(cinfo->content.signedData);
|
|
break;
|
|
case SEC_OID_PKCS7_ENVELOPED_DATA:
|
|
rv = NSS_CMSEnvelopedData_Encode_BeforeStart(cinfo->content.envelopedData);
|
|
break;
|
|
case SEC_OID_PKCS7_DIGESTED_DATA:
|
|
rv = NSS_CMSDigestedData_Encode_BeforeStart(cinfo->content.digestedData);
|
|
break;
|
|
case SEC_OID_PKCS7_ENCRYPTED_DATA:
|
|
rv = NSS_CMSEncryptedData_Encode_BeforeStart(cinfo->content.encryptedData);
|
|
break;
|
|
default:
|
|
if (NSS_CMSType_IsWrapper(tag)) {
|
|
rv = NSS_CMSGenericWrapperData_Encode_BeforeStart(tag,
|
|
p7ecx->content.genericData);
|
|
} else {
|
|
rv = SECFailure;
|
|
}
|
|
break;
|
|
}
|
|
if (rv != SECSuccess) {
|
|
PORT_Free(p7ecx);
|
|
return NULL;
|
|
}
|
|
|
|
/* Initialize the BER encoder.
|
|
* Note that this will not encode anything until the first call to SEC_ASN1EncoderUpdate */
|
|
p7ecx->ecx = SEC_ASN1EncoderStart(cmsg, NSSCMSMessageTemplate,
|
|
nss_cms_encoder_out, &(p7ecx->output));
|
|
if (p7ecx->ecx == NULL) {
|
|
PORT_Free (p7ecx);
|
|
return NULL;
|
|
}
|
|
p7ecx->ecxupdated = PR_FALSE;
|
|
|
|
/*
|
|
* Indicate that we are streaming. We will be streaming until we
|
|
* get past the contents bytes.
|
|
*/
|
|
if (!cinfo->privateInfo || !cinfo->privateInfo->dontStream)
|
|
SEC_ASN1EncoderSetStreaming(p7ecx->ecx);
|
|
|
|
/*
|
|
* The notify function will watch for the contents field.
|
|
*/
|
|
SEC_ASN1EncoderSetNotifyProc(p7ecx->ecx, nss_cms_encoder_notify, p7ecx);
|
|
|
|
/* this will kick off the encoding process & encode everything up to the content bytes,
|
|
* at which point the notify function sets streaming mode (and possibly creates
|
|
* a child encoder). */
|
|
p7ecx->ecxupdated = PR_TRUE;
|
|
if (SEC_ASN1EncoderUpdate(p7ecx->ecx, NULL, 0) != SECSuccess) {
|
|
PORT_Free (p7ecx);
|
|
return NULL;
|
|
}
|
|
|
|
return p7ecx;
|
|
}
|
|
|
|
/*
|
|
* NSS_CMSEncoder_Update - take content data delivery from the user
|
|
*
|
|
* "p7ecx" - encoder context
|
|
* "data" - content data
|
|
* "len" - length of content data
|
|
*
|
|
* need to find the lowest level (and call SEC_ASN1EncoderUpdate on the way down),
|
|
* then hand the data to the work_data fn
|
|
*/
|
|
SECStatus
|
|
NSS_CMSEncoder_Update(NSSCMSEncoderContext *p7ecx, const char *data, unsigned long len)
|
|
{
|
|
SECStatus rv;
|
|
NSSCMSContentInfo *cinfo;
|
|
SECOidTag childtype;
|
|
|
|
if (p7ecx->error)
|
|
return SECFailure;
|
|
|
|
/* hand data to the innermost decoder */
|
|
if (p7ecx->childp7ecx) {
|
|
/* tell the child to start encoding, up to its first data byte, if it
|
|
* hasn't started yet */
|
|
if (!p7ecx->childp7ecx->ecxupdated) {
|
|
p7ecx->childp7ecx->ecxupdated = PR_TRUE;
|
|
if (SEC_ASN1EncoderUpdate(p7ecx->childp7ecx->ecx, NULL, 0) != SECSuccess)
|
|
return SECFailure;
|
|
}
|
|
/* recursion here */
|
|
rv = NSS_CMSEncoder_Update(p7ecx->childp7ecx, data, len);
|
|
} else {
|
|
/* we are at innermost decoder */
|
|
/* find out about our inner content type - must be data */
|
|
cinfo = NSS_CMSContent_GetContentInfo(p7ecx->content.pointer, p7ecx->type);
|
|
if (!cinfo) {
|
|
/* The original programmer didn't expect this to happen */
|
|
p7ecx->error = SEC_ERROR_LIBRARY_FAILURE;
|
|
return SECFailure;
|
|
}
|
|
|
|
childtype = NSS_CMSContentInfo_GetContentTypeTag(cinfo);
|
|
if (!NSS_CMSType_IsData(childtype))
|
|
return SECFailure;
|
|
/* and we must not have preset data */
|
|
if (cinfo->content.data != NULL)
|
|
return SECFailure;
|
|
|
|
/* hand it the data so it can encode it (let DER trickle up the chain) */
|
|
rv = nss_cms_encoder_work_data(p7ecx, NULL, (const unsigned char *)data, len, PR_FALSE, PR_TRUE);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* NSS_CMSEncoder_Cancel - stop all encoding
|
|
*
|
|
* we need to walk down the chain of encoders and the finish them from the innermost out
|
|
*/
|
|
SECStatus
|
|
NSS_CMSEncoder_Cancel(NSSCMSEncoderContext *p7ecx)
|
|
{
|
|
SECStatus rv = SECFailure;
|
|
|
|
/* XXX do this right! */
|
|
|
|
/*
|
|
* Finish any inner decoders before us so that all the encoded data is flushed
|
|
* This basically finishes all the decoders from the innermost to the outermost.
|
|
* Finishing an inner decoder may result in data being updated to the outer decoder
|
|
* while we are already in NSS_CMSEncoder_Finish, but that's allright.
|
|
*/
|
|
if (p7ecx->childp7ecx) {
|
|
rv = NSS_CMSEncoder_Cancel(p7ecx->childp7ecx); /* frees p7ecx->childp7ecx */
|
|
/* remember rv for now */
|
|
}
|
|
|
|
/*
|
|
* On the way back up, there will be no more data (if we had an
|
|
* inner encoder, it is done now!)
|
|
* Flush out any remaining data and/or finish digests.
|
|
*/
|
|
rv = nss_cms_encoder_work_data(p7ecx, NULL, NULL, 0, PR_TRUE, (p7ecx->childp7ecx == NULL));
|
|
if (rv != SECSuccess)
|
|
goto loser;
|
|
|
|
p7ecx->childp7ecx = NULL;
|
|
|
|
/* kick the encoder back into working mode again.
|
|
* We turn off streaming stuff (which will cause the encoder to continue
|
|
* encoding happily, now that we have all the data (like digests) ready for it).
|
|
*/
|
|
SEC_ASN1EncoderClearTakeFromBuf(p7ecx->ecx);
|
|
SEC_ASN1EncoderClearStreaming(p7ecx->ecx);
|
|
|
|
/* now that TakeFromBuf is off, this will kick this encoder to finish encoding */
|
|
rv = SEC_ASN1EncoderUpdate(p7ecx->ecx, NULL, 0);
|
|
|
|
loser:
|
|
SEC_ASN1EncoderFinish(p7ecx->ecx);
|
|
PORT_Free (p7ecx);
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* NSS_CMSEncoder_Finish - signal the end of data
|
|
*
|
|
* we need to walk down the chain of encoders and the finish them from the innermost out
|
|
*/
|
|
SECStatus
|
|
NSS_CMSEncoder_Finish(NSSCMSEncoderContext *p7ecx)
|
|
{
|
|
SECStatus rv = SECFailure;
|
|
NSSCMSContentInfo *cinfo;
|
|
|
|
/*
|
|
* Finish any inner decoders before us so that all the encoded data is flushed
|
|
* This basically finishes all the decoders from the innermost to the outermost.
|
|
* Finishing an inner decoder may result in data being updated to the outer decoder
|
|
* while we are already in NSS_CMSEncoder_Finish, but that's allright.
|
|
*/
|
|
if (p7ecx->childp7ecx) {
|
|
/* tell the child to start encoding, up to its first data byte, if it
|
|
* hasn't yet */
|
|
if (!p7ecx->childp7ecx->ecxupdated) {
|
|
p7ecx->childp7ecx->ecxupdated = PR_TRUE;
|
|
rv = SEC_ASN1EncoderUpdate(p7ecx->childp7ecx->ecx, NULL, 0);
|
|
if (rv != SECSuccess) {
|
|
NSS_CMSEncoder_Finish(p7ecx->childp7ecx); /* frees p7ecx->childp7ecx */
|
|
goto loser;
|
|
}
|
|
}
|
|
rv = NSS_CMSEncoder_Finish(p7ecx->childp7ecx); /* frees p7ecx->childp7ecx */
|
|
if (rv != SECSuccess)
|
|
goto loser;
|
|
}
|
|
|
|
/*
|
|
* On the way back up, there will be no more data (if we had an
|
|
* inner encoder, it is done now!)
|
|
* Flush out any remaining data and/or finish digests.
|
|
*/
|
|
rv = nss_cms_encoder_work_data(p7ecx, NULL, NULL, 0, PR_TRUE, (p7ecx->childp7ecx == NULL));
|
|
if (rv != SECSuccess)
|
|
goto loser;
|
|
|
|
p7ecx->childp7ecx = NULL;
|
|
|
|
cinfo = NSS_CMSContent_GetContentInfo(p7ecx->content.pointer, p7ecx->type);
|
|
if (!cinfo) {
|
|
/* The original programmer didn't expect this to happen */
|
|
p7ecx->error = SEC_ERROR_LIBRARY_FAILURE;
|
|
rv = SECFailure;
|
|
goto loser;
|
|
}
|
|
SEC_ASN1EncoderClearTakeFromBuf(p7ecx->ecx);
|
|
SEC_ASN1EncoderClearStreaming(p7ecx->ecx);
|
|
/* now that TakeFromBuf is off, this will kick this encoder to finish encoding */
|
|
rv = SEC_ASN1EncoderUpdate(p7ecx->ecx, NULL, 0);
|
|
|
|
if (p7ecx->error)
|
|
rv = SECFailure;
|
|
|
|
loser:
|
|
SEC_ASN1EncoderFinish(p7ecx->ecx);
|
|
PORT_Free (p7ecx);
|
|
return rv;
|
|
}
|