cmsdigdata.c
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上传日期:2007-01-12
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文件大小:6k
- /*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is the Netscape security libraries.
- *
- * The Initial Developer of the Original Code is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1994-2000 Netscape Communications Corporation. All
- * Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL"), in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your
- * version of this file only under the terms of the GPL and not to
- * allow others to use your version of this file under the MPL,
- * indicate your decision by deleting the provisions above and
- * replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient
- * may use your version of this file under either the MPL or the
- * GPL.
- */
- /*
- * CMS digestedData methods.
- *
- * $Id: cmsdigdata.c,v 1.2 2000/06/13 21:56:28 chrisk%netscape.com Exp $
- */
- #include "cmslocal.h"
- #include "secitem.h"
- #include "secasn1.h"
- #include "secoid.h"
- #include "secerr.h"
- /*
- * NSS_CMSDigestedData_Create - create a digestedData object (presumably for encoding)
- *
- * version will be set by NSS_CMSDigestedData_Encode_BeforeStart
- * digestAlg is passed as parameter
- * contentInfo must be filled by the user
- * digest will be calculated while encoding
- */
- NSSCMSDigestedData *
- NSS_CMSDigestedData_Create(NSSCMSMessage *cmsg, SECAlgorithmID *digestalg)
- {
- void *mark;
- NSSCMSDigestedData *digd;
- PLArenaPool *poolp;
- poolp = cmsg->poolp;
- mark = PORT_ArenaMark(poolp);
- digd = (NSSCMSDigestedData *)PORT_ArenaZAlloc(poolp, sizeof(NSSCMSDigestedData));
- if (digd == NULL)
- goto loser;
- digd->cmsg = cmsg;
- if (SECOID_CopyAlgorithmID (poolp, &(digd->digestAlg), digestalg) != SECSuccess)
- goto loser;
- PORT_ArenaUnmark(poolp, mark);
- return digd;
- loser:
- PORT_ArenaRelease(poolp, mark);
- return NULL;
- }
- /*
- * NSS_CMSDigestedData_Destroy - destroy a digestedData object
- */
- void
- NSS_CMSDigestedData_Destroy(NSSCMSDigestedData *digd)
- {
- /* everything's in a pool, so don't worry about the storage */
- return;
- }
- /*
- * NSS_CMSDigestedData_GetContentInfo - return pointer to digestedData object's contentInfo
- */
- NSSCMSContentInfo *
- NSS_CMSDigestedData_GetContentInfo(NSSCMSDigestedData *digd)
- {
- return &(digd->contentInfo);
- }
- /*
- * NSS_CMSDigestedData_Encode_BeforeStart - do all the necessary things to a DigestedData
- * before encoding begins.
- *
- * In particular:
- * - set the right version number. The contentInfo's content type must be set up already.
- */
- SECStatus
- NSS_CMSDigestedData_Encode_BeforeStart(NSSCMSDigestedData *digd)
- {
- unsigned long version;
- SECItem *dummy;
- version = NSS_CMS_DIGESTED_DATA_VERSION_DATA;
- if (NSS_CMSContentInfo_GetContentTypeTag(&(digd->contentInfo)) != SEC_OID_PKCS7_DATA)
- version = NSS_CMS_DIGESTED_DATA_VERSION_ENCAP;
- dummy = SEC_ASN1EncodeInteger(digd->cmsg->poolp, &(digd->version), version);
- return (dummy == NULL) ? SECFailure : SECSuccess;
- }
- /*
- * NSS_CMSDigestedData_Encode_BeforeData - do all the necessary things to a DigestedData
- * before the encapsulated data is passed through the encoder.
- *
- * In detail:
- * - set up the digests if necessary
- */
- SECStatus
- NSS_CMSDigestedData_Encode_BeforeData(NSSCMSDigestedData *digd)
- {
- /* set up the digests */
- if (digd->digestAlg.algorithm.len != 0 && digd->digest.len == 0) {
- /* if digest is already there, do nothing */
- digd->contentInfo.digcx = NSS_CMSDigestContext_StartSingle(&(digd->digestAlg));
- if (digd->contentInfo.digcx == NULL)
- return SECFailure;
- }
- return SECSuccess;
- }
- /*
- * NSS_CMSDigestedData_Encode_AfterData - do all the necessary things to a DigestedData
- * after all the encapsulated data was passed through the encoder.
- *
- * In detail:
- * - finish the digests
- */
- SECStatus
- NSS_CMSDigestedData_Encode_AfterData(NSSCMSDigestedData *digd)
- {
- /* did we have digest calculation going on? */
- if (digd->contentInfo.digcx) {
- if (NSS_CMSDigestContext_FinishSingle(digd->contentInfo.digcx,
- digd->cmsg->poolp, &(digd->digest)) != SECSuccess)
- return SECFailure; /* error has been set by NSS_CMSDigestContext_FinishSingle */
- digd->contentInfo.digcx = NULL;
- }
- return SECSuccess;
- }
- /*
- * NSS_CMSDigestedData_Decode_BeforeData - do all the necessary things to a DigestedData
- * before the encapsulated data is passed through the encoder.
- *
- * In detail:
- * - set up the digests if necessary
- */
- SECStatus
- NSS_CMSDigestedData_Decode_BeforeData(NSSCMSDigestedData *digd)
- {
- /* is there a digest algorithm yet? */
- if (digd->digestAlg.algorithm.len == 0)
- return SECFailure;
- digd->contentInfo.digcx = NSS_CMSDigestContext_StartSingle(&(digd->digestAlg));
- if (digd->contentInfo.digcx == NULL)
- return SECFailure;
- return SECSuccess;
- }
- /*
- * NSS_CMSDigestedData_Decode_AfterData - do all the necessary things to a DigestedData
- * after all the encapsulated data was passed through the encoder.
- *
- * In detail:
- * - finish the digests
- */
- SECStatus
- NSS_CMSDigestedData_Decode_AfterData(NSSCMSDigestedData *digd)
- {
- /* did we have digest calculation going on? */
- if (digd->contentInfo.digcx) {
- if (NSS_CMSDigestContext_FinishSingle(digd->contentInfo.digcx,
- digd->cmsg->poolp, &(digd->cdigest)) != SECSuccess)
- return SECFailure; /* error has been set by NSS_CMSDigestContext_FinishSingle */
- digd->contentInfo.digcx = NULL;
- }
- return SECSuccess;
- }
- /*
- * NSS_CMSDigestedData_Decode_AfterEnd - finalize a digestedData.
- *
- * In detail:
- * - check the digests for equality
- */
- SECStatus
- NSS_CMSDigestedData_Decode_AfterEnd(NSSCMSDigestedData *digd)
- {
- /* did we have digest calculation going on? */
- if (digd->cdigest.len != 0) {
- /* XXX comparision btw digest & cdigest */
- /* XXX set status */
- /* TODO!!!! */
- }
- return SECSuccess;
- }