cmssigdata.c
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上传日期:2007-01-12
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文件大小:25k
- /*
- * 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 signedData methods.
- *
- * $Id: cmssigdata.c,v 1.10 2000/10/06 23:26:10 nelsonb%netscape.com Exp $
- */
- #include "cmslocal.h"
- #include "cert.h"
- #include "cdbhdl.h"
- #include "secasn1.h"
- #include "secitem.h"
- #include "secoid.h"
- #include "pk11func.h"
- #include "secerr.h"
- NSSCMSSignedData *
- NSS_CMSSignedData_Create(NSSCMSMessage *cmsg)
- {
- void *mark;
- NSSCMSSignedData *sigd;
- PLArenaPool *poolp;
- poolp = cmsg->poolp;
- mark = PORT_ArenaMark(poolp);
- sigd = (NSSCMSSignedData *)PORT_ArenaZAlloc (poolp, sizeof(NSSCMSSignedData));
- if (sigd == NULL)
- goto loser;
- sigd->cmsg = cmsg;
- /* signerInfos, certs, certlists, crls are all empty */
- /* version is set in NSS_CMSSignedData_Finalize() */
- PORT_ArenaUnmark(poolp, mark);
- return sigd;
- loser:
- PORT_ArenaRelease(poolp, mark);
- return NULL;
- }
- void
- NSS_CMSSignedData_Destroy(NSSCMSSignedData *sigd)
- {
- CERTCertificate **certs, *cert;
- CERTCertificateList **certlists, *certlist;
- NSSCMSSignerInfo **signerinfos, *si;
- if (sigd == NULL)
- return;
- certs = sigd->certs;
- certlists = sigd->certLists;
- signerinfos = sigd->signerInfos;
- if (certs != NULL) {
- while ((cert = *certs++) != NULL)
- CERT_DestroyCertificate (cert);
- }
- if (certlists != NULL) {
- while ((certlist = *certlists++) != NULL)
- CERT_DestroyCertificateList (certlist);
- }
- if (signerinfos != NULL) {
- while ((si = *signerinfos++) != NULL)
- NSS_CMSSignerInfo_Destroy(si);
- }
- /* everything's in a pool, so don't worry about the storage */
- }
- /*
- * NSS_CMSSignedData_Encode_BeforeStart - do all the necessary things to a SignedData
- * before start of encoding.
- *
- * In detail:
- * - find out about the right value to put into sigd->version
- * - come up with a list of digestAlgorithms (which should be the union of the algorithms
- * in the signerinfos).
- * If we happen to have a pre-set list of algorithms (and digest values!), we
- * check if we have all the signerinfos' algorithms. If not, this is an error.
- */
- SECStatus
- NSS_CMSSignedData_Encode_BeforeStart(NSSCMSSignedData *sigd)
- {
- NSSCMSSignerInfo *signerinfo;
- SECOidTag digestalgtag;
- SECItem *dummy;
- int version;
- SECStatus rv;
- PRBool haveDigests = PR_FALSE;
- int n, i;
- PLArenaPool *poolp;
- poolp = sigd->cmsg->poolp;
- /* we assume that we have precomputed digests if there is a list of algorithms, and */
- /* a chunk of data for each of those algorithms */
- if (sigd->digestAlgorithms != NULL && sigd->digests != NULL) {
- for (i=0; sigd->digestAlgorithms[i] != NULL; i++) {
- if (sigd->digests[i] == NULL)
- break;
- }
- if (sigd->digestAlgorithms[i] == NULL) /* reached the end of the array? */
- haveDigests = PR_TRUE; /* yes: we must have all the digests */
- }
-
- version = NSS_CMS_SIGNED_DATA_VERSION_BASIC;
- /* RFC2630 5.1 "version is the syntax version number..." */
- if (NSS_CMSContentInfo_GetContentTypeTag(&(sigd->contentInfo)) != SEC_OID_PKCS7_DATA)
- version = NSS_CMS_SIGNED_DATA_VERSION_EXT;
- /* prepare all the SignerInfos (there may be none) */
- for (i=0; i < NSS_CMSSignedData_SignerInfoCount(sigd); i++) {
- signerinfo = NSS_CMSSignedData_GetSignerInfo(sigd, i);
- /* RFC2630 5.1 "version is the syntax version number..." */
- if (NSS_CMSSignerInfo_GetVersion(signerinfo) != NSS_CMS_SIGNER_INFO_VERSION_ISSUERSN)
- version = NSS_CMS_SIGNED_DATA_VERSION_EXT;
-
- /* collect digestAlgorithms from SignerInfos */
- /* (we need to know which algorithms we have when the content comes in) */
- /* do not overwrite any existing digestAlgorithms (and digest) */
- digestalgtag = NSS_CMSSignerInfo_GetDigestAlgTag(signerinfo);
- n = NSS_CMSAlgArray_GetIndexByAlgTag(sigd->digestAlgorithms, digestalgtag);
- if (n < 0 && haveDigests) {
- /* oops, there is a digestalg we do not have a digest for */
- /* but we were supposed to have all the digests already... */
- goto loser;
- } else if (n < 0) {
- /* add the digestAlgorithm & a NULL digest */
- rv = NSS_CMSSignedData_AddDigest(poolp, sigd, digestalgtag, NULL);
- if (rv != SECSuccess)
- goto loser;
- } else {
- /* found it, nothing to do */
- }
- }
- dummy = SEC_ASN1EncodeInteger(poolp, &(sigd->version), (long)version);
- if (dummy == NULL)
- return SECFailure;
- /* this is a SET OF, so we need to sort them guys */
- rv = NSS_CMSArray_SortByDER((void **)sigd->digestAlgorithms, SECOID_AlgorithmIDTemplate,
- (void **)sigd->digests);
- if (rv != SECSuccess)
- return SECFailure;
-
- return SECSuccess;
- loser:
- return SECFailure;
- }
- SECStatus
- NSS_CMSSignedData_Encode_BeforeData(NSSCMSSignedData *sigd)
- {
- /* set up the digests */
- if (sigd->digestAlgorithms != NULL) {
- sigd->contentInfo.digcx = NSS_CMSDigestContext_StartMultiple(sigd->digestAlgorithms);
- if (sigd->contentInfo.digcx == NULL)
- return SECFailure;
- }
- return SECSuccess;
- }
- /*
- * NSS_CMSSignedData_Encode_AfterData - do all the necessary things to a SignedData
- * after all the encapsulated data was passed through the encoder.
- *
- * In detail:
- * - create the signatures in all the SignerInfos
- *
- * Please note that nothing is done to the Certificates and CRLs in the message - this
- * is entirely the responsibility of our callers.
- */
- SECStatus
- NSS_CMSSignedData_Encode_AfterData(NSSCMSSignedData *sigd)
- {
- NSSCMSSignerInfo **signerinfos, *signerinfo;
- NSSCMSContentInfo *cinfo;
- SECOidTag digestalgtag;
- SECStatus ret = SECFailure;
- SECStatus rv;
- SECItem *contentType;
- int certcount;
- int i, ci, cli, n, rci, si;
- PLArenaPool *poolp;
- CERTCertificateList *certlist;
- extern const SEC_ASN1Template NSSCMSSignerInfoTemplate[];
- poolp = sigd->cmsg->poolp;
- cinfo = &(sigd->contentInfo);
- /* did we have digest calculation going on? */
- if (cinfo->digcx) {
- rv = NSS_CMSDigestContext_FinishMultiple(cinfo->digcx, poolp, &(sigd->digests));
- if (rv != SECSuccess)
- goto loser; /* error has been set by NSS_CMSDigestContext_FinishMultiple */
- cinfo->digcx = NULL;
- }
- signerinfos = sigd->signerInfos;
- certcount = 0;
- /* prepare all the SignerInfos (there may be none) */
- for (i=0; i < NSS_CMSSignedData_SignerInfoCount(sigd); i++) {
- signerinfo = NSS_CMSSignedData_GetSignerInfo(sigd, i);
- /* find correct digest for this signerinfo */
- digestalgtag = NSS_CMSSignerInfo_GetDigestAlgTag(signerinfo);
- n = NSS_CMSAlgArray_GetIndexByAlgTag(sigd->digestAlgorithms, digestalgtag);
- if (n < 0 || sigd->digests == NULL || sigd->digests[n] == NULL) {
- /* oops - digest not found */
- PORT_SetError(SEC_ERROR_DIGEST_NOT_FOUND);
- goto loser;
- }
- /* XXX if our content is anything else but data, we need to force the
- * presence of signed attributes (RFC2630 5.3 "signedAttributes is a
- * collection...") */
- /* pass contentType here as we want a contentType attribute */
- if ((contentType = NSS_CMSContentInfo_GetContentTypeOID(cinfo)) == NULL)
- goto loser;
- /* sign the thing */
- rv = NSS_CMSSignerInfo_Sign(signerinfo, sigd->digests[n], contentType);
- if (rv != SECSuccess)
- goto loser;
- /* while we're at it, count number of certs in certLists */
- certlist = NSS_CMSSignerInfo_GetCertList(signerinfo);
- if (certlist)
- certcount += certlist->len;
- }
- /* this is a SET OF, so we need to sort them guys */
- rv = NSS_CMSArray_SortByDER((void **)signerinfos, NSSCMSSignerInfoTemplate, NULL);
- if (rv != SECSuccess)
- goto loser;
- /*
- * now prepare certs & crls
- */
- /* count the rest of the certs */
- if (sigd->certs != NULL) {
- for (ci = 0; sigd->certs[ci] != NULL; ci++)
- certcount++;
- }
- if (sigd->certLists != NULL) {
- for (cli = 0; sigd->certLists[cli] != NULL; cli++)
- certcount += sigd->certLists[cli]->len;
- }
- if (certcount == 0) {
- sigd->rawCerts = NULL;
- } else {
- /*
- * Combine all of the certs and cert chains into rawcerts.
- * Note: certcount is an upper bound; we may not need that many slots
- * but we will allocate anyway to avoid having to do another pass.
- * (The temporary space saving is not worth it.)
- *
- * XXX ARGH - this NEEDS to be fixed. need to come up with a decent
- * SetOfDERcertficates implementation
- */
- sigd->rawCerts = (SECItem **)PORT_ArenaAlloc(poolp, (certcount + 1) * sizeof(SECItem *));
- if (sigd->rawCerts == NULL)
- return SECFailure;
- /*
- * XXX Want to check for duplicates and not add *any* cert that is
- * already in the set. This will be more important when we start
- * dealing with larger sets of certs, dual-key certs (signing and
- * encryption), etc. For the time being we can slide by...
- *
- * XXX ARGH - this NEEDS to be fixed. need to come up with a decent
- * SetOfDERcertficates implementation
- */
- rci = 0;
- if (signerinfos != NULL) {
- for (si = 0; signerinfos[si] != NULL; si++) {
- signerinfo = signerinfos[si];
- for (ci = 0; ci < signerinfo->certList->len; ci++)
- sigd->rawCerts[rci++] = &(signerinfo->certList->certs[ci]);
- }
- }
- if (sigd->certs != NULL) {
- for (ci = 0; sigd->certs[ci] != NULL; ci++)
- sigd->rawCerts[rci++] = &(sigd->certs[ci]->derCert);
- }
- if (sigd->certLists != NULL) {
- for (cli = 0; sigd->certLists[cli] != NULL; cli++) {
- for (ci = 0; ci < sigd->certLists[cli]->len; ci++)
- sigd->rawCerts[rci++] = &(sigd->certLists[cli]->certs[ci]);
- }
- }
- sigd->rawCerts[rci] = NULL;
- /* this is a SET OF, so we need to sort them guys - we have the DER already, though */
- NSS_CMSArray_Sort((void **)sigd->rawCerts, NSS_CMSUtil_DERCompare, NULL, NULL);
- }
- ret = SECSuccess;
- loser:
- return ret;
- }
- SECStatus
- NSS_CMSSignedData_Decode_BeforeData(NSSCMSSignedData *sigd)
- {
- /* set up the digests */
- if (sigd->digestAlgorithms != NULL && sigd->digests == NULL) {
- /* if digests are already there, do nothing */
- sigd->contentInfo.digcx = NSS_CMSDigestContext_StartMultiple(sigd->digestAlgorithms);
- if (sigd->contentInfo.digcx == NULL)
- return SECFailure;
- }
- return SECSuccess;
- }
- /*
- * NSS_CMSSignedData_Decode_AfterData - do all the necessary things to a SignedData
- * after all the encapsulated data was passed through the decoder.
- */
- SECStatus
- NSS_CMSSignedData_Decode_AfterData(NSSCMSSignedData *sigd)
- {
- /* did we have digest calculation going on? */
- if (sigd->contentInfo.digcx) {
- if (NSS_CMSDigestContext_FinishMultiple(sigd->contentInfo.digcx, sigd->cmsg->poolp, &(sigd->digests)) != SECSuccess)
- return SECFailure; /* error has been set by NSS_CMSDigestContext_FinishMultiple */
- sigd->contentInfo.digcx = NULL;
- }
- return SECSuccess;
- }
- /*
- * NSS_CMSSignedData_Decode_AfterEnd - do all the necessary things to a SignedData
- * after all decoding is finished.
- */
- SECStatus
- NSS_CMSSignedData_Decode_AfterEnd(NSSCMSSignedData *sigd)
- {
- NSSCMSSignerInfo **signerinfos;
- int i;
- /* set cmsg for all the signerinfos */
- signerinfos = sigd->signerInfos;
- /* set cmsg for all the signerinfos */
- if (signerinfos) {
- for (i = 0; signerinfos[i] != NULL; i++)
- signerinfos[i]->cmsg = sigd->cmsg;
- }
- return SECSuccess;
- }
- /*
- * NSS_CMSSignedData_GetSignerInfos - retrieve the SignedData's signer list
- */
- NSSCMSSignerInfo **
- NSS_CMSSignedData_GetSignerInfos(NSSCMSSignedData *sigd)
- {
- return sigd->signerInfos;
- }
- int
- NSS_CMSSignedData_SignerInfoCount(NSSCMSSignedData *sigd)
- {
- return NSS_CMSArray_Count((void **)sigd->signerInfos);
- }
- NSSCMSSignerInfo *
- NSS_CMSSignedData_GetSignerInfo(NSSCMSSignedData *sigd, int i)
- {
- return sigd->signerInfos[i];
- }
- /*
- * NSS_CMSSignedData_GetDigestAlgs - retrieve the SignedData's digest algorithm list
- */
- SECAlgorithmID **
- NSS_CMSSignedData_GetDigestAlgs(NSSCMSSignedData *sigd)
- {
- return sigd->digestAlgorithms;
- }
- /*
- * NSS_CMSSignedData_GetContentInfo - return pointer to this signedData's contentinfo
- */
- NSSCMSContentInfo *
- NSS_CMSSignedData_GetContentInfo(NSSCMSSignedData *sigd)
- {
- return &(sigd->contentInfo);
- }
- /*
- * NSS_CMSSignedData_GetCertificateList - retrieve the SignedData's certificate list
- */
- SECItem **
- NSS_CMSSignedData_GetCertificateList(NSSCMSSignedData *sigd)
- {
- return sigd->rawCerts;
- }
- SECStatus
- NSS_CMSSignedData_ImportCerts(NSSCMSSignedData *sigd, CERTCertDBHandle *certdb,
- SECCertUsage certusage, PRBool keepcerts)
- {
- int certcount;
- SECStatus rv;
- int i;
- certcount = NSS_CMSArray_Count((void **)sigd->rawCerts);
- rv = CERT_ImportCerts(certdb, certusage, certcount, sigd->rawCerts, NULL,
- keepcerts, PR_FALSE, NULL);
- /* XXX CRL handling */
- if (sigd->signerInfos != NULL) {
- /* fill in all signerinfo's certs */
- for (i = 0; sigd->signerInfos[i] != NULL; i++)
- (void)NSS_CMSSignerInfo_GetSigningCertificate(sigd->signerInfos[i], certdb);
- }
- return rv;
- }
- /*
- * XXX the digests need to be passed in BETWEEN the decoding and the verification in case
- * of external signatures!
- */
- /*
- * NSS_CMSSignedData_VerifySignerInfo - check the signatures.
- *
- * The digests were either calculated during decoding (and are stored in the
- * signedData itself) or set after decoding using NSS_CMSSignedData_SetDigests.
- *
- * The verification checks if the signing cert is valid and has a trusted chain
- * for the purpose specified by "certusage".
- */
- SECStatus
- NSS_CMSSignedData_VerifySignerInfo(NSSCMSSignedData *sigd, int i,
- CERTCertDBHandle *certdb, SECCertUsage certusage)
- {
- NSSCMSSignerInfo *signerinfo;
- NSSCMSContentInfo *cinfo;
- SECOidData *algiddata;
- SECItem *contentType, *digest;
- cinfo = &(sigd->contentInfo);
- signerinfo = sigd->signerInfos[i];
- /* verify certificate */
- if (NSS_CMSSignerInfo_VerifyCertificate(signerinfo, certdb, certusage) != SECSuccess)
- return SECFailure; /* error is set by NSS_CMSSignerInfo_VerifyCertificate */
- /* find digest and contentType for signerinfo */
- algiddata = NSS_CMSSignerInfo_GetDigestAlg(signerinfo);
- digest = NSS_CMSSignedData_GetDigestByAlgTag(sigd, algiddata->offset);
- contentType = NSS_CMSContentInfo_GetContentTypeOID(cinfo);
- /* now verify signature */
- return NSS_CMSSignerInfo_Verify(signerinfo, digest, contentType);
- }
- /*
- * NSS_CMSSignedData_VerifyCertsOnly - verify the certs in a certs-only message
- */
- SECStatus
- NSS_CMSSignedData_VerifyCertsOnly(NSSCMSSignedData *sigd,
- CERTCertDBHandle *certdb,
- SECCertUsage usage)
- {
- CERTCertificate *cert;
- SECStatus rv = SECSuccess;
- int i;
- int count;
- if (!sigd || !certdb || !sigd->rawCerts) {
- PORT_SetError(SEC_ERROR_INVALID_ARGS);
- return SECFailure;
- }
- count = NSS_CMSArray_Count((void**)sigd->rawCerts);
- for (i=0; i < count; i++) {
- if (sigd->certs && sigd->certs[i]) {
- cert = sigd->certs[i];
- } else {
- cert = CERT_FindCertByDERCert(certdb, sigd->rawCerts[i]);
- if (!cert) {
- rv = SECFailure;
- break;
- }
- }
- rv |= CERT_VerifyCert(certdb, cert, PR_TRUE, usage, PR_Now(),
- NULL, NULL);
- }
- return rv;
- }
- /*
- * NSS_CMSSignedData_HasDigests - see if we have digests in place
- */
- PRBool
- NSS_CMSSignedData_HasDigests(NSSCMSSignedData *sigd)
- {
- return (sigd->digests != NULL);
- }
- SECStatus
- NSS_CMSSignedData_AddCertList(NSSCMSSignedData *sigd, CERTCertificateList *certlist)
- {
- SECStatus rv;
- PORT_Assert(certlist != NULL);
- if (certlist == NULL)
- return SECFailure;
- /* XXX memory?? a certlist has an arena of its own and is not refcounted!?!? */
- rv = NSS_CMSArray_Add(sigd->cmsg->poolp, (void ***)&(sigd->certLists), (void *)certlist);
- return rv;
- }
- /*
- * NSS_CMSSignedData_AddCertChain - add cert and its entire chain to the set of certs
- */
- SECStatus
- NSS_CMSSignedData_AddCertChain(NSSCMSSignedData *sigd, CERTCertificate *cert)
- {
- CERTCertificateList *certlist;
- SECCertUsage usage;
- SECStatus rv;
- usage = certUsageEmailSigner;
- /* do not include root */
- certlist = CERT_CertChainFromCert(cert, usage, PR_FALSE);
- if (certlist == NULL)
- return SECFailure;
- rv = NSS_CMSSignedData_AddCertList(sigd, certlist);
- return rv;
- }
- SECStatus
- NSS_CMSSignedData_AddCertificate(NSSCMSSignedData *sigd, CERTCertificate *cert)
- {
- CERTCertificate *c;
- SECStatus rv;
- PORT_Assert(cert != NULL);
- if (cert == NULL)
- return SECFailure;
- c = CERT_DupCertificate(cert);
- rv = NSS_CMSArray_Add(sigd->cmsg->poolp, (void ***)&(sigd->certs), (void *)c);
- return rv;
- }
- PRBool
- NSS_CMSSignedData_ContainsCertsOrCrls(NSSCMSSignedData *sigd)
- {
- if (sigd->rawCerts != NULL && sigd->rawCerts[0] != NULL)
- return PR_TRUE;
- else if (sigd->crls != NULL && sigd->crls[0] != NULL)
- return PR_TRUE;
- else
- return PR_FALSE;
- }
- SECStatus
- NSS_CMSSignedData_AddSignerInfo(NSSCMSSignedData *sigd,
- NSSCMSSignerInfo *signerinfo)
- {
- void *mark;
- SECStatus rv;
- SECOidTag digestalgtag;
- PLArenaPool *poolp;
- poolp = sigd->cmsg->poolp;
- mark = PORT_ArenaMark(poolp);
- /* add signerinfo */
- rv = NSS_CMSArray_Add(poolp, (void ***)&(sigd->signerInfos), (void *)signerinfo);
- if (rv != SECSuccess)
- goto loser;
- /*
- * add empty digest
- * Empty because we don't have it yet. Either it gets created during encoding
- * (if the data is present) or has to be set externally.
- * XXX maybe pass it in optionally?
- */
- digestalgtag = NSS_CMSSignerInfo_GetDigestAlgTag(signerinfo);
- rv = NSS_CMSSignedData_SetDigestValue(sigd, digestalgtag, NULL);
- if (rv != SECSuccess)
- goto loser;
- /*
- * The last thing to get consistency would be adding the digest.
- */
- PORT_ArenaUnmark(poolp, mark);
- return SECSuccess;
- loser:
- PORT_ArenaRelease (poolp, mark);
- return SECFailure;
- }
- SECItem *
- NSS_CMSSignedData_GetDigestByAlgTag(NSSCMSSignedData *sigd, SECOidTag algtag)
- {
- int idx;
- idx = NSS_CMSAlgArray_GetIndexByAlgTag(sigd->digestAlgorithms, algtag);
- return sigd->digests[idx];
- }
- /*
- * NSS_CMSSignedData_SetDigests - set a signedData's digests member
- *
- * "digestalgs" - array of digest algorithm IDs
- * "digests" - array of digests corresponding to the digest algorithms
- */
- SECStatus
- NSS_CMSSignedData_SetDigests(NSSCMSSignedData *sigd,
- SECAlgorithmID **digestalgs,
- SECItem **digests)
- {
- int cnt, i, idx;
- if (sigd->digestAlgorithms == NULL) {
- PORT_SetError(SEC_ERROR_INVALID_ARGS);
- return SECFailure;
- }
- /* we assume that the digests array is just not there yet */
- PORT_Assert(sigd->digests == NULL);
- if (sigd->digests != NULL) {
- PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
- return SECFailure;
- }
- /* now allocate one (same size as digestAlgorithms) */
- cnt = NSS_CMSArray_Count((void **)sigd->digestAlgorithms);
- sigd->digests = PORT_ArenaZAlloc(sigd->cmsg->poolp, (cnt + 1) * sizeof(SECItem *));
- if (sigd->digests == NULL) {
- PORT_SetError(SEC_ERROR_NO_MEMORY);
- return SECFailure;
- }
- for (i = 0; sigd->digestAlgorithms[i] != NULL; i++) {
- /* try to find the sigd's i'th digest algorithm in the array we passed in */
- idx = NSS_CMSAlgArray_GetIndexByAlgID(digestalgs, sigd->digestAlgorithms[i]);
- if (idx < 0) {
- PORT_SetError(SEC_ERROR_DIGEST_NOT_FOUND);
- return SECFailure;
- }
- /* found it - now set it */
- if ((sigd->digests[i] = SECITEM_AllocItem(sigd->cmsg->poolp, NULL, 0)) == NULL ||
- SECITEM_CopyItem(sigd->cmsg->poolp, sigd->digests[i], digests[idx]) != SECSuccess)
- {
- PORT_SetError(SEC_ERROR_NO_MEMORY);
- return SECFailure;
- }
- }
- return SECSuccess;
- }
- SECStatus
- NSS_CMSSignedData_SetDigestValue(NSSCMSSignedData *sigd,
- SECOidTag digestalgtag,
- SECItem *digestdata)
- {
- SECItem *digest = NULL;
- PLArenaPool *poolp;
- void *mark;
- int n;
- poolp = sigd->cmsg->poolp;
- mark = PORT_ArenaMark(poolp);
- if (digestdata) {
- /* copy digestdata item to arena (in case we have it and are not only making room) */
- if (SECITEM_CopyItem(poolp, digest, digestdata) != SECSuccess)
- goto loser;
- }
- n = -1;
- if (sigd->digestAlgorithms != NULL)
- n = NSS_CMSAlgArray_GetIndexByAlgTag(sigd->digestAlgorithms, digestalgtag);
- /* if not found, add a digest */
- if (n < 0) {
- if (NSS_CMSSignedData_AddDigest(poolp, sigd, digestalgtag, digest) != SECSuccess)
- goto loser;
- } else {
- /* replace NULL pointer with digest item (and leak previous value) */
- sigd->digests[n] = digest;
- }
- PORT_ArenaUnmark(poolp, mark);
- return SECSuccess;
- loser:
- PORT_ArenaRelease(poolp, mark);
- return SECFailure;
- }
- SECStatus
- NSS_CMSSignedData_AddDigest(PRArenaPool *poolp,
- NSSCMSSignedData *sigd,
- SECOidTag digestalgtag,
- SECItem *digest)
- {
- SECAlgorithmID *digestalg;
- void *mark;
- mark = PORT_ArenaMark(poolp);
- digestalg = PORT_ArenaZAlloc(poolp, sizeof(SECAlgorithmID));
- if (digestalg == NULL)
- goto loser;
- if (SECOID_SetAlgorithmID (poolp, digestalg, digestalgtag, NULL) != SECSuccess) /* no params */
- goto loser;
- if (NSS_CMSArray_Add(poolp, (void ***)&(sigd->digestAlgorithms), (void *)digestalg) != SECSuccess ||
- /* even if digest is NULL, add dummy to have same-size array */
- NSS_CMSArray_Add(poolp, (void ***)&(sigd->digests), (void *)digest) != SECSuccess)
- {
- goto loser;
- }
- PORT_ArenaUnmark(poolp, mark);
- return SECSuccess;
- loser:
- PORT_ArenaRelease(poolp, mark);
- return SECFailure;
- }
- SECItem *
- NSS_CMSSignedData_GetDigestValue(NSSCMSSignedData *sigd, SECOidTag digestalgtag)
- {
- int n;
- if (sigd->digestAlgorithms == NULL)
- return NULL;
- n = NSS_CMSAlgArray_GetIndexByAlgTag(sigd->digestAlgorithms, digestalgtag);
- return (n < 0) ? NULL : sigd->digests[n];
- }
- /* =============================================================================
- * Misc. utility functions
- */
- /*
- * NSS_CMSSignedData_CreateCertsOnly - create a certs-only SignedData.
- *
- * cert - base certificates that will be included
- * include_chain - if true, include the complete cert chain for cert
- *
- * More certs and chains can be added via AddCertificate and AddCertChain.
- *
- * An error results in a return value of NULL and an error set.
- *
- * XXXX CRLs
- */
- NSSCMSSignedData *
- NSS_CMSSignedData_CreateCertsOnly(NSSCMSMessage *cmsg, CERTCertificate *cert, PRBool include_chain)
- {
- NSSCMSSignedData *sigd;
- void *mark;
- PLArenaPool *poolp;
- SECStatus rv;
- poolp = cmsg->poolp;
- mark = PORT_ArenaMark(poolp);
- sigd = NSS_CMSSignedData_Create(cmsg);
- if (sigd == NULL)
- goto loser;
- /* no signerinfos, thus no digestAlgorithms */
- /* but certs */
- if (include_chain) {
- rv = NSS_CMSSignedData_AddCertChain(sigd, cert);
- } else {
- rv = NSS_CMSSignedData_AddCertificate(sigd, cert);
- }
- if (rv != SECSuccess)
- goto loser;
- /* RFC2630 5.2 sez:
- * In the degenerate case where there are no signers, the
- * EncapsulatedContentInfo value being "signed" is irrelevant. In this
- * case, the content type within the EncapsulatedContentInfo value being
- * "signed" should be id-data (as defined in section 4), and the content
- * field of the EncapsulatedContentInfo value should be omitted.
- */
- rv = NSS_CMSContentInfo_SetContent_Data(cmsg, &(sigd->contentInfo), NULL, PR_TRUE);
- if (rv != SECSuccess)
- goto loser;
- PORT_ArenaUnmark(poolp, mark);
- return sigd;
- loser:
- if (sigd)
- NSS_CMSSignedData_Destroy(sigd);
- PORT_ArenaRelease(poolp, mark);
- return NULL;
- }
- /* TODO:
- * NSS_CMSSignerInfo_GetReceiptRequest()
- * NSS_CMSSignedData_HasReceiptRequest()
- * easy way to iterate over signers
- */