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232 lines
6.7 KiB
C
232 lines
6.7 KiB
C
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Netscape security libraries.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1994-2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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* CMS digestedData methods.
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*
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* $Id: cmsdigdata.c,v 1.5 2004/04/25 15:03:16 gerv%gerv.net Exp $
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*/
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#include "cmslocal.h"
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#include "secitem.h"
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#include "secasn1.h"
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#include "secoid.h"
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#include "secerr.h"
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/*
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* NSS_CMSDigestedData_Create - create a digestedData object (presumably for encoding)
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*
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* version will be set by NSS_CMSDigestedData_Encode_BeforeStart
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* digestAlg is passed as parameter
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* contentInfo must be filled by the user
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* digest will be calculated while encoding
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*/
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NSSCMSDigestedData *
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NSS_CMSDigestedData_Create(NSSCMSMessage *cmsg, SECAlgorithmID *digestalg)
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{
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void *mark;
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NSSCMSDigestedData *digd;
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PLArenaPool *poolp;
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poolp = cmsg->poolp;
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mark = PORT_ArenaMark(poolp);
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digd = (NSSCMSDigestedData *)PORT_ArenaZAlloc(poolp, sizeof(NSSCMSDigestedData));
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if (digd == NULL)
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goto loser;
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digd->cmsg = cmsg;
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if (SECOID_CopyAlgorithmID (poolp, &(digd->digestAlg), digestalg) != SECSuccess)
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goto loser;
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PORT_ArenaUnmark(poolp, mark);
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return digd;
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loser:
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PORT_ArenaRelease(poolp, mark);
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return NULL;
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}
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/*
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* NSS_CMSDigestedData_Destroy - destroy a digestedData object
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*/
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void
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NSS_CMSDigestedData_Destroy(NSSCMSDigestedData *digd)
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{
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/* everything's in a pool, so don't worry about the storage */
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NSS_CMSContentInfo_Destroy(&(digd->contentInfo));
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return;
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}
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/*
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* NSS_CMSDigestedData_GetContentInfo - return pointer to digestedData object's contentInfo
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*/
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NSSCMSContentInfo *
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NSS_CMSDigestedData_GetContentInfo(NSSCMSDigestedData *digd)
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{
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return &(digd->contentInfo);
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}
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/*
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* NSS_CMSDigestedData_Encode_BeforeStart - do all the necessary things to a DigestedData
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* before encoding begins.
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*
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* In particular:
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* - set the right version number. The contentInfo's content type must be set up already.
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*/
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SECStatus
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NSS_CMSDigestedData_Encode_BeforeStart(NSSCMSDigestedData *digd)
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{
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unsigned long version;
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SECItem *dummy;
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version = NSS_CMS_DIGESTED_DATA_VERSION_DATA;
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if (NSS_CMSContentInfo_GetContentTypeTag(&(digd->contentInfo)) != SEC_OID_PKCS7_DATA)
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version = NSS_CMS_DIGESTED_DATA_VERSION_ENCAP;
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dummy = SEC_ASN1EncodeInteger(digd->cmsg->poolp, &(digd->version), version);
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return (dummy == NULL) ? SECFailure : SECSuccess;
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}
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/*
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* NSS_CMSDigestedData_Encode_BeforeData - do all the necessary things to a DigestedData
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* before the encapsulated data is passed through the encoder.
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*
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* In detail:
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* - set up the digests if necessary
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*/
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SECStatus
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NSS_CMSDigestedData_Encode_BeforeData(NSSCMSDigestedData *digd)
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{
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/* set up the digests */
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if (digd->digestAlg.algorithm.len != 0 && digd->digest.len == 0) {
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/* if digest is already there, do nothing */
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digd->contentInfo.digcx = NSS_CMSDigestContext_StartSingle(&(digd->digestAlg));
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if (digd->contentInfo.digcx == NULL)
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return SECFailure;
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}
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return SECSuccess;
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}
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/*
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* NSS_CMSDigestedData_Encode_AfterData - do all the necessary things to a DigestedData
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* after all the encapsulated data was passed through the encoder.
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*
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* In detail:
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* - finish the digests
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*/
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SECStatus
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NSS_CMSDigestedData_Encode_AfterData(NSSCMSDigestedData *digd)
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{
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SECStatus rv = SECSuccess;
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/* did we have digest calculation going on? */
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if (digd->contentInfo.digcx) {
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rv = NSS_CMSDigestContext_FinishSingle(digd->contentInfo.digcx,
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digd->cmsg->poolp,
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&(digd->digest));
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/* error has been set by NSS_CMSDigestContext_FinishSingle */
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digd->contentInfo.digcx = NULL;
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}
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return rv;
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}
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/*
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* NSS_CMSDigestedData_Decode_BeforeData - do all the necessary things to a DigestedData
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* before the encapsulated data is passed through the encoder.
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*
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* In detail:
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* - set up the digests if necessary
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*/
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SECStatus
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NSS_CMSDigestedData_Decode_BeforeData(NSSCMSDigestedData *digd)
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{
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/* is there a digest algorithm yet? */
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if (digd->digestAlg.algorithm.len == 0)
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return SECFailure;
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digd->contentInfo.digcx = NSS_CMSDigestContext_StartSingle(&(digd->digestAlg));
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if (digd->contentInfo.digcx == NULL)
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return SECFailure;
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return SECSuccess;
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}
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/*
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* NSS_CMSDigestedData_Decode_AfterData - do all the necessary things to a DigestedData
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* after all the encapsulated data was passed through the encoder.
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*
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* In detail:
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* - finish the digests
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*/
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SECStatus
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NSS_CMSDigestedData_Decode_AfterData(NSSCMSDigestedData *digd)
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{
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SECStatus rv = SECSuccess;
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/* did we have digest calculation going on? */
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if (digd->contentInfo.digcx) {
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rv = NSS_CMSDigestContext_FinishSingle(digd->contentInfo.digcx,
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digd->cmsg->poolp,
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&(digd->cdigest));
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/* error has been set by NSS_CMSDigestContext_FinishSingle */
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digd->contentInfo.digcx = NULL;
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}
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return rv;
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}
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/*
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* NSS_CMSDigestedData_Decode_AfterEnd - finalize a digestedData.
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*
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* In detail:
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* - check the digests for equality
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*/
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SECStatus
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NSS_CMSDigestedData_Decode_AfterEnd(NSSCMSDigestedData *digd)
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{
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/* did we have digest calculation going on? */
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if (digd->cdigest.len != 0) {
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/* XXX comparision btw digest & cdigest */
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/* XXX set status */
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/* TODO!!!! */
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}
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return SECSuccess;
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}
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