cmssiginfo.c
上传用户:lyxiangda
上传日期:2007-01-12
资源大小:3042k
文件大小:26k
- /*
- * 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 signerInfo methods.
- *
- * $Id: cmssiginfo.c,v 1.4 2000/06/20 16:28:57 chrisk%netscape.com Exp $
- */
- #include "cmslocal.h"
- #include "cert.h"
- #include "key.h"
- #include "secasn1.h"
- #include "secitem.h"
- #include "secoid.h"
- #include "pk11func.h"
- #include "prtime.h"
- #include "secerr.h"
- #include "cryptohi.h"
- #include "smime.h"
- /* =============================================================================
- * SIGNERINFO
- */
- NSSCMSSignerInfo *
- NSS_CMSSignerInfo_Create(NSSCMSMessage *cmsg, CERTCertificate *cert, SECOidTag digestalgtag)
- {
- void *mark;
- NSSCMSSignerInfo *signerinfo;
- int version;
- PLArenaPool *poolp;
- poolp = cmsg->poolp;
- mark = PORT_ArenaMark(poolp);
- signerinfo = (NSSCMSSignerInfo *)PORT_ArenaZAlloc(poolp, sizeof(NSSCMSSignerInfo));
- if (signerinfo == NULL) {
- PORT_ArenaRelease(poolp, mark);
- return NULL;
- }
- if ((signerinfo->cert = CERT_DupCertificate(cert)) == NULL)
- goto loser;
- signerinfo->cmsg = cmsg;
- signerinfo->signerIdentifier.identifierType = NSSCMSSignerID_IssuerSN; /* hardcoded for now */
- if ((signerinfo->signerIdentifier.id.issuerAndSN = CERT_GetCertIssuerAndSN(poolp, cert)) == NULL)
- goto loser;
- /* set version right now */
- version = NSS_CMS_SIGNER_INFO_VERSION_ISSUERSN;
- /* RFC2630 5.3 "version is the syntax version number. If the .... " */
- if (signerinfo->signerIdentifier.identifierType == NSSCMSSignerID_SubjectKeyID)
- version = NSS_CMS_SIGNER_INFO_VERSION_SUBJKEY;
- (void)SEC_ASN1EncodeInteger(poolp, &(signerinfo->version), (long)version);
- if (SECOID_SetAlgorithmID(poolp, &signerinfo->digestAlg, digestalgtag, NULL) != SECSuccess)
- goto loser;
- PORT_ArenaUnmark(poolp, mark);
- return signerinfo;
- loser:
- PORT_ArenaRelease(poolp, mark);
- return NULL;
- }
- /*
- * NSS_CMSSignerInfo_Destroy - destroy a SignerInfo data structure
- */
- void
- NSS_CMSSignerInfo_Destroy(NSSCMSSignerInfo *si)
- {
- if (si->cert != NULL)
- CERT_DestroyCertificate(si->cert);
- /* XXX storage ??? */
- }
- /*
- * NSS_CMSSignerInfo_Sign - sign something
- *
- */
- SECStatus
- NSS_CMSSignerInfo_Sign(NSSCMSSignerInfo *signerinfo, SECItem *digest, SECItem *contentType)
- {
- CERTCertificate *cert;
- SECKEYPrivateKey *privkey = NULL;
- SECOidTag digestalgtag;
- SECOidTag signalgtag;
- SECItem signature = { 0 };
- SECStatus rv;
- PLArenaPool *poolp, *tmppoolp;
- PORT_Assert (digest != NULL);
- poolp = signerinfo->cmsg->poolp;
- cert = signerinfo->cert;
- if ((privkey = PK11_FindKeyByAnyCert(cert, signerinfo->cmsg->pwfn_arg)) == NULL)
- goto loser;
- digestalgtag = NSS_CMSSignerInfo_GetDigestAlgTag(signerinfo);
- /*
- * XXX I think there should be a cert-level interface for this,
- * so that I do not have to know about subjectPublicKeyInfo...
- */
- signalgtag = SECOID_GetAlgorithmTag(&(cert->subjectPublicKeyInfo.algorithm));
- /* Fortezza MISSI have weird signature formats. Map them to standard DSA formats */
- signalgtag = PK11_FortezzaMapSig(signalgtag);
- if (signerinfo->authAttr != NULL) {
- SECItem encoded_attrs;
- /* find and fill in the message digest attribute. */
- rv = NSS_CMSAttributeArray_SetAttr(poolp, &(signerinfo->authAttr), SEC_OID_PKCS9_MESSAGE_DIGEST, digest, PR_FALSE);
- if (rv != SECSuccess)
- goto loser;
- if (contentType != NULL) {
- /* if the caller wants us to, find and fill in the content type attribute. */
- rv = NSS_CMSAttributeArray_SetAttr(poolp, &(signerinfo->authAttr), SEC_OID_PKCS9_CONTENT_TYPE, contentType, PR_FALSE);
- if (rv != SECSuccess)
- goto loser;
- }
- if ((tmppoolp = PORT_NewArena (1024)) == NULL) {
- PORT_SetError(SEC_ERROR_NO_MEMORY);
- goto loser;
- }
- /*
- * Before encoding, reorder the attributes so that when they
- * are encoded, they will be conforming DER, which is required
- * to have a specific order and that is what must be used for
- * the hash/signature. We do this here, rather than building
- * it into EncodeAttributes, because we do not want to do
- * such reordering on incoming messages (which also uses
- * EncodeAttributes) or our old signatures (and other "broken"
- * implementations) will not verify. So, we want to guarantee
- * that we send out good DER encodings of attributes, but not
- * to expect to receive them.
- */
- if (NSS_CMSAttributeArray_Reorder(signerinfo->authAttr) != SECSuccess)
- goto loser;
- encoded_attrs.data = NULL;
- encoded_attrs.len = 0;
- if (NSS_CMSAttributeArray_Encode(tmppoolp, &(signerinfo->authAttr), &encoded_attrs) == NULL)
- goto loser;
- rv = SEC_SignData(&signature, encoded_attrs.data, encoded_attrs.len, privkey,
- NSS_CMSUtil_MakeSignatureAlgorithm(digestalgtag, signalgtag));
- PORT_FreeArena(tmppoolp, PR_FALSE); /* awkward memory management :-( */
- } else {
- rv = SGN_Digest(privkey, digestalgtag, &signature, digest);
- }
- SECKEY_DestroyPrivateKey(privkey);
- privkey = NULL;
- if (rv != SECSuccess)
- goto loser;
- if (SECITEM_CopyItem(poolp, &(signerinfo->encDigest), &signature) != SECSuccess)
- goto loser;
- SECITEM_FreeItem(&signature, PR_FALSE);
- if (SECOID_SetAlgorithmID(poolp, &(signerinfo->digestEncAlg), signalgtag, NULL) != SECSuccess)
- goto loser;
- return SECSuccess;
- loser:
- if (signature.len != 0)
- SECITEM_FreeItem (&signature, PR_FALSE);
- if (privkey)
- SECKEY_DestroyPrivateKey(privkey);
- return SECFailure;
- }
- SECStatus
- NSS_CMSSignerInfo_VerifyCertificate(NSSCMSSignerInfo *signerinfo, CERTCertDBHandle *certdb,
- SECCertUsage certusage)
- {
- CERTCertificate *cert;
- int64 stime;
- if ((cert = NSS_CMSSignerInfo_GetSigningCertificate(signerinfo, certdb)) == NULL) {
- signerinfo->verificationStatus = NSSCMSVS_SigningCertNotFound;
- return SECFailure;
- }
- /*
- * Get and convert the signing time; if available, it will be used
- * both on the cert verification and for importing the sender
- * email profile.
- */
- if (NSS_CMSSignerInfo_GetSigningTime (signerinfo, &stime) != SECSuccess)
- stime = PR_Now(); /* not found or conversion failed, so check against now */
-
- /*
- * XXX This uses the signing time, if available. Additionally, we
- * might want to, if there is no signing time, get the message time
- * from the mail header itself, and use that. That would require
- * a change to our interface though, and for S/MIME callers to pass
- * in a time (and for non-S/MIME callers to pass in nothing, or
- * maybe make them pass in the current time, always?).
- */
- if (CERT_VerifyCert(certdb, cert, PR_TRUE, certusage, stime, signerinfo->cmsg->pwfn_arg, NULL) != SECSuccess) {
- signerinfo->verificationStatus = NSSCMSVS_SigningCertNotTrusted;
- return SECFailure;
- }
- return SECSuccess;
- }
- /*
- * NSS_CMSSignerInfo_Verify - verify the signature of a single SignerInfo
- *
- * Just verifies the signature. The assumption is that verification of the certificate
- * is done already.
- */
- SECStatus
- NSS_CMSSignerInfo_Verify(NSSCMSSignerInfo *signerinfo, SECItem *digest, SECItem *contentType)
- {
- SECKEYPublicKey *publickey = NULL;
- NSSCMSAttribute *attr;
- SECItem encoded_attrs;
- CERTCertificate *cert;
- NSSCMSVerificationStatus vs = NSSCMSVS_Unverified;
- PLArenaPool *poolp;
- if (signerinfo == NULL)
- return SECFailure;
- /* NSS_CMSSignerInfo_GetSigningCertificate will fail if 2nd parm is NULL and */
- /* cert has not been verified */
- if ((cert = NSS_CMSSignerInfo_GetSigningCertificate(signerinfo, NULL)) == NULL) {
- vs = NSSCMSVS_SigningCertNotFound;
- goto loser;
- }
- if ((publickey = CERT_ExtractPublicKey(cert)) == NULL) {
- vs = NSSCMSVS_ProcessingError;
- goto loser;
- }
- /*
- * XXX This may not be the right set of algorithms to check.
- * I'd prefer to trust that just calling VFY_Verify{Data,Digest}
- * would do the right thing (and set an error if it could not);
- * then additional algorithms could be handled by that code
- * and we would Just Work. So this check should just be removed,
- * but not until the VFY code is better at setting errors.
- */
- switch (SECOID_GetAlgorithmTag(&(signerinfo->digestEncAlg))) {
- case SEC_OID_PKCS1_RSA_ENCRYPTION:
- case SEC_OID_ANSIX9_DSA_SIGNATURE:
- case SEC_OID_ANSIX9_DSA_SIGNATURE_WITH_SHA1_DIGEST:
- /* ok */
- break;
- case SEC_OID_UNKNOWN:
- vs = NSSCMSVS_SignatureAlgorithmUnknown;
- goto loser;
- default:
- vs = NSSCMSVS_SignatureAlgorithmUnsupported;
- goto loser;
- }
- if (!NSS_CMSArray_IsEmpty((void **)signerinfo->authAttr)) {
- if (contentType) {
- /*
- * Check content type
- *
- * RFC2630 sez that if there are any authenticated attributes,
- * then there must be one for content type which matches the
- * content type of the content being signed, and there must
- * be one for message digest which matches our message digest.
- * So check these things first.
- */
- if ((attr = NSS_CMSAttributeArray_FindAttrByOidTag(signerinfo->authAttr,
- SEC_OID_PKCS9_CONTENT_TYPE, PR_TRUE)) == NULL)
- {
- vs = NSSCMSVS_MalformedSignature;
- goto loser;
- }
-
- if (NSS_CMSAttribute_CompareValue(attr, contentType) == PR_FALSE) {
- vs = NSSCMSVS_MalformedSignature;
- goto loser;
- }
- }
- /*
- * Check digest
- */
- if ((attr = NSS_CMSAttributeArray_FindAttrByOidTag(signerinfo->authAttr, SEC_OID_PKCS9_MESSAGE_DIGEST, PR_TRUE)) == NULL)
- {
- vs = NSSCMSVS_MalformedSignature;
- goto loser;
- }
- if (NSS_CMSAttribute_CompareValue(attr, digest) == PR_FALSE) {
- vs = NSSCMSVS_DigestMismatch;
- goto loser;
- }
- if ((poolp = PORT_NewArena (1024)) == NULL) {
- vs = NSSCMSVS_ProcessingError;
- goto loser;
- }
- /*
- * Check signature
- *
- * The signature is based on a digest of the DER-encoded authenticated
- * attributes. So, first we encode and then we digest/verify.
- * we trust the decoder to have the attributes in the right (sorted) order
- */
- encoded_attrs.data = NULL;
- encoded_attrs.len = 0;
- if (NSS_CMSAttributeArray_Encode(poolp, &(signerinfo->authAttr), &encoded_attrs) == NULL ||
- encoded_attrs.data == NULL || encoded_attrs.len == 0)
- {
- vs = NSSCMSVS_ProcessingError;
- goto loser;
- }
- vs = (VFY_VerifyData (encoded_attrs.data, encoded_attrs.len,
- publickey, &(signerinfo->encDigest),
- SECOID_GetAlgorithmTag(&(signerinfo->digestEncAlg)),
- signerinfo->cmsg->pwfn_arg) != SECSuccess) ? NSSCMSVS_BadSignature : NSSCMSVS_GoodSignature;
- PORT_FreeArena(poolp, PR_FALSE); /* awkward memory management :-( */
- } else {
- SECItem *sig;
- /* No authenticated attributes. The signature is based on the plain message digest. */
- sig = &(signerinfo->encDigest);
- if (sig->len == 0)
- goto loser;
- vs = (VFY_VerifyDigest(digest, publickey, sig,
- SECOID_GetAlgorithmTag(&(signerinfo->digestEncAlg)),
- signerinfo->cmsg->pwfn_arg) != SECSuccess) ? NSSCMSVS_BadSignature : NSSCMSVS_GoodSignature;
- }
- if (vs == NSSCMSVS_BadSignature) {
- /*
- * XXX Change the generic error into our specific one, because
- * in that case we get a better explanation out of the Security
- * Advisor. This is really a bug in our error strings (the
- * "generic" error has a lousy/wrong message associated with it
- * which assumes the signature verification was done for the
- * purposes of checking the issuer signature on a certificate)
- * but this is at least an easy workaround and/or in the
- * Security Advisor, which specifically checks for the error
- * SEC_ERROR_PKCS7_BAD_SIGNATURE and gives more explanation
- * in that case but does not similarly check for
- * SEC_ERROR_BAD_SIGNATURE. It probably should, but then would
- * probably say the wrong thing in the case that it *was* the
- * certificate signature check that failed during the cert
- * verification done above. Our error handling is really a mess.
- */
- if (PORT_GetError() == SEC_ERROR_BAD_SIGNATURE)
- PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
- }
- if (publickey != NULL)
- SECKEY_DestroyPublicKey (publickey);
- signerinfo->verificationStatus = vs;
- return (vs == NSSCMSVS_GoodSignature) ? SECSuccess : SECFailure;
- loser:
- if (publickey != NULL)
- SECKEY_DestroyPublicKey (publickey);
- signerinfo->verificationStatus = vs;
- PORT_SetError (SEC_ERROR_PKCS7_BAD_SIGNATURE);
- return SECFailure;
- }
- NSSCMSVerificationStatus
- NSS_CMSSignerInfo_GetVerificationStatus(NSSCMSSignerInfo *signerinfo)
- {
- return signerinfo->verificationStatus;
- }
- SECOidData *
- NSS_CMSSignerInfo_GetDigestAlg(NSSCMSSignerInfo *signerinfo)
- {
- return SECOID_FindOID (&(signerinfo->digestAlg.algorithm));
- }
- SECOidTag
- NSS_CMSSignerInfo_GetDigestAlgTag(NSSCMSSignerInfo *signerinfo)
- {
- SECOidData *algdata;
- algdata = SECOID_FindOID (&(signerinfo->digestAlg.algorithm));
- if (algdata != NULL)
- return algdata->offset;
- else
- return SEC_OID_UNKNOWN;
- }
- CERTCertificateList *
- NSS_CMSSignerInfo_GetCertList(NSSCMSSignerInfo *signerinfo)
- {
- return signerinfo->certList;
- }
- int
- NSS_CMSSignerInfo_GetVersion(NSSCMSSignerInfo *signerinfo)
- {
- unsigned long version;
- /* always take apart the SECItem */
- if (SEC_ASN1DecodeInteger(&(signerinfo->version), &version) != SECSuccess)
- return 0;
- else
- return (int)version;
- }
- /*
- * NSS_CMSSignerInfo_GetSigningTime - return the signing time,
- * in UTCTime format, of a CMS signerInfo.
- *
- * sinfo - signerInfo data for this signer
- *
- * Returns a pointer to XXXX (what?)
- * A return value of NULL is an error.
- */
- SECStatus
- NSS_CMSSignerInfo_GetSigningTime(NSSCMSSignerInfo *sinfo, PRTime *stime)
- {
- NSSCMSAttribute *attr;
- SECItem *value;
- if (sinfo == NULL)
- return SECFailure;
- if (sinfo->signingTime != 0) {
- *stime = sinfo->signingTime; /* cached copy */
- return SECSuccess;
- }
- attr = NSS_CMSAttributeArray_FindAttrByOidTag(sinfo->authAttr, SEC_OID_PKCS9_SIGNING_TIME, PR_TRUE);
- /* XXXX multi-valued attributes NIH */
- if (attr == NULL || (value = NSS_CMSAttribute_GetValue(attr)) == NULL)
- return SECFailure;
- if (DER_UTCTimeToTime(stime, value) != SECSuccess)
- return SECFailure;
- sinfo->signingTime = *stime; /* make cached copy */
- return SECSuccess;
- }
- /*
- * Return the signing cert of a CMS signerInfo.
- *
- * the certs in the enclosing SignedData must have been imported already
- */
- CERTCertificate *
- NSS_CMSSignerInfo_GetSigningCertificate(NSSCMSSignerInfo *signerinfo, CERTCertDBHandle *certdb)
- {
- CERTCertificate *cert;
- if (signerinfo->cert != NULL)
- return signerinfo->cert;
- /* no certdb, and cert hasn't been set yet? */
- if (certdb == NULL)
- return NULL;
- /*
- * This cert will also need to be freed, but since we save it
- * in signerinfo for later, we do not want to destroy it when
- * we leave this function -- we let the clean-up of the entire
- * cinfo structure later do the destroy of this cert.
- */
- switch (signerinfo->signerIdentifier.identifierType) {
- case NSSCMSSignerID_IssuerSN:
- cert = CERT_FindCertByIssuerAndSN(certdb, signerinfo->signerIdentifier.id.issuerAndSN);
- break;
- case NSSCMSSignerID_SubjectKeyID:
- #if 0 /* not yet implemented */
- cert = CERT_FindCertBySubjectKeyID(certdb, signerinfo->signerIdentifier.id.subjectKeyID);
- #else
- cert = NULL;
- #endif
- break;
- default:
- cert = NULL;
- break;
- }
- /* cert can be NULL at that point */
- signerinfo->cert = cert; /* earmark it */
- return cert;
- }
- /*
- * NSS_CMSSignerInfo_GetSignerCommonName - return the common name of the signer
- *
- * sinfo - signerInfo data for this signer
- *
- * Returns a pointer to allocated memory, which must be freed.
- * A return value of NULL is an error.
- */
- char *
- NSS_CMSSignerInfo_GetSignerCommonName(NSSCMSSignerInfo *sinfo)
- {
- CERTCertificate *signercert;
- /* will fail if cert is not verified */
- if ((signercert = NSS_CMSSignerInfo_GetSigningCertificate(sinfo, NULL)) == NULL)
- return NULL;
- return (CERT_GetCommonName(&signercert->subject));
- }
- /*
- * NSS_CMSSignerInfo_GetSignerEmailAddress - return the common name of the signer
- *
- * sinfo - signerInfo data for this signer
- *
- * Returns a pointer to allocated memory, which must be freed.
- * A return value of NULL is an error.
- */
- char *
- NSS_CMSSignerInfo_GetSignerEmailAddress(NSSCMSSignerInfo *sinfo)
- {
- CERTCertificate *signercert;
- if ((signercert = NSS_CMSSignerInfo_GetSigningCertificate(sinfo, NULL)) == NULL)
- return NULL;
- if (signercert->emailAddr == NULL)
- return NULL;
- return (PORT_Strdup(signercert->emailAddr));
- }
- /*
- * NSS_CMSSignerInfo_AddAuthAttr - add an attribute to the
- * authenticated (i.e. signed) attributes of "signerinfo".
- */
- SECStatus
- NSS_CMSSignerInfo_AddAuthAttr(NSSCMSSignerInfo *signerinfo, NSSCMSAttribute *attr)
- {
- return NSS_CMSAttributeArray_AddAttr(signerinfo->cmsg->poolp, &(signerinfo->authAttr), attr);
- }
- /*
- * NSS_CMSSignerInfo_AddUnauthAttr - add an attribute to the
- * unauthenticated attributes of "signerinfo".
- */
- SECStatus
- NSS_CMSSignerInfo_AddUnauthAttr(NSSCMSSignerInfo *signerinfo, NSSCMSAttribute *attr)
- {
- return NSS_CMSAttributeArray_AddAttr(signerinfo->cmsg->poolp, &(signerinfo->unAuthAttr), attr);
- }
- /*
- * NSS_CMSSignerInfo_AddSigningTime - add the signing time to the
- * authenticated (i.e. signed) attributes of "signerinfo".
- *
- * This is expected to be included in outgoing signed
- * messages for email (S/MIME) but is likely useful in other situations.
- *
- * This should only be added once; a second call will do nothing.
- *
- * XXX This will probably just shove the current time into "signerinfo"
- * but it will not actually get signed until the entire item is
- * processed for encoding. Is this (expected to be small) delay okay?
- */
- SECStatus
- NSS_CMSSignerInfo_AddSigningTime(NSSCMSSignerInfo *signerinfo, PRTime t)
- {
- NSSCMSAttribute *attr;
- SECItem stime;
- void *mark;
- PLArenaPool *poolp;
- poolp = signerinfo->cmsg->poolp;
- mark = PORT_ArenaMark(poolp);
- /* create new signing time attribute */
- if (DER_TimeToUTCTime(&stime, t) != SECSuccess)
- goto loser;
- if ((attr = NSS_CMSAttribute_Create(poolp, SEC_OID_PKCS9_SIGNING_TIME, &stime, PR_FALSE)) == NULL) {
- SECITEM_FreeItem (&stime, PR_FALSE);
- goto loser;
- }
- SECITEM_FreeItem (&stime, PR_FALSE);
- if (NSS_CMSSignerInfo_AddAuthAttr(signerinfo, attr) != SECSuccess)
- goto loser;
- PORT_ArenaUnmark (poolp, mark);
- return SECSuccess;
- loser:
- PORT_ArenaRelease (poolp, mark);
- return SECFailure;
- }
- /*
- * NSS_CMSSignerInfo_AddSMIMECaps - add a SMIMECapabilities attribute to the
- * authenticated (i.e. signed) attributes of "signerinfo".
- *
- * This is expected to be included in outgoing signed
- * messages for email (S/MIME).
- */
- SECStatus
- NSS_CMSSignerInfo_AddSMIMECaps(NSSCMSSignerInfo *signerinfo)
- {
- NSSCMSAttribute *attr;
- SECItem *smimecaps = NULL;
- void *mark;
- PLArenaPool *poolp;
- poolp = signerinfo->cmsg->poolp;
- mark = PORT_ArenaMark(poolp);
- smimecaps = SECITEM_AllocItem(poolp, NULL, 0);
- if (smimecaps == NULL)
- goto loser;
- /* create new signing time attribute */
- if (NSS_SMIMEUtil_CreateSMIMECapabilities(poolp, smimecaps,
- PK11_FortezzaHasKEA(signerinfo->cert)) != SECSuccess)
- goto loser;
- if ((attr = NSS_CMSAttribute_Create(poolp, SEC_OID_PKCS9_SMIME_CAPABILITIES, smimecaps, PR_TRUE)) == NULL)
- goto loser;
- if (NSS_CMSSignerInfo_AddAuthAttr(signerinfo, attr) != SECSuccess)
- goto loser;
- PORT_ArenaUnmark (poolp, mark);
- return SECSuccess;
- loser:
- PORT_ArenaRelease (poolp, mark);
- return SECFailure;
- }
- /*
- * NSS_CMSSignerInfo_AddSMIMEEncKeyPrefs - add a SMIMEEncryptionKeyPreferences attribute to the
- * authenticated (i.e. signed) attributes of "signerinfo".
- *
- * This is expected to be included in outgoing signed messages for email (S/MIME).
- */
- SECStatus
- NSS_CMSSignerInfo_AddSMIMEEncKeyPrefs(NSSCMSSignerInfo *signerinfo, CERTCertificate *cert, CERTCertDBHandle *certdb)
- {
- NSSCMSAttribute *attr;
- SECItem *smimeekp = NULL;
- void *mark;
- PLArenaPool *poolp;
- /* verify this cert for encryption */
- if (CERT_VerifyCert(certdb, cert, PR_TRUE, certUsageEmailRecipient, PR_Now(), signerinfo->cmsg->pwfn_arg, NULL) != SECSuccess) {
- return SECFailure;
- }
- poolp = signerinfo->cmsg->poolp;
- mark = PORT_ArenaMark(poolp);
- smimeekp = SECITEM_AllocItem(poolp, NULL, 0);
- if (smimeekp == NULL)
- goto loser;
- /* create new signing time attribute */
- if (NSS_SMIMEUtil_CreateSMIMEEncKeyPrefs(poolp, smimeekp, cert) != SECSuccess)
- goto loser;
- if ((attr = NSS_CMSAttribute_Create(poolp, SEC_OID_SMIME_ENCRYPTION_KEY_PREFERENCE, smimeekp, PR_TRUE)) == NULL)
- goto loser;
- if (NSS_CMSSignerInfo_AddAuthAttr(signerinfo, attr) != SECSuccess)
- goto loser;
- PORT_ArenaUnmark (poolp, mark);
- return SECSuccess;
- loser:
- PORT_ArenaRelease (poolp, mark);
- return SECFailure;
- }
- /*
- * NSS_CMSSignerInfo_AddCounterSignature - countersign a signerinfo
- *
- * 1. digest the DER-encoded signature value of the original signerinfo
- * 2. create new signerinfo with correct version, sid, digestAlg
- * 3. add message-digest authAttr, but NO content-type
- * 4. sign the authAttrs
- * 5. DER-encode the new signerInfo
- * 6. add the whole thing to original signerInfo's unAuthAttrs
- * as a SEC_OID_PKCS9_COUNTER_SIGNATURE attribute
- *
- * XXXX give back the new signerinfo?
- */
- SECStatus
- NSS_CMSSignerInfo_AddCounterSignature(NSSCMSSignerInfo *signerinfo,
- SECOidTag digestalg, CERTCertificate signingcert)
- {
- /* XXXX TBD XXXX */
- return SECFailure;
- }
- /*
- * XXXX the following needs to be done in the S/MIME layer code
- * after signature of a signerinfo is verified
- */
- SECStatus
- NSS_SMIMESignerInfo_SaveSMIMEProfile(NSSCMSSignerInfo *signerinfo)
- {
- CERTCertificate *cert = NULL;
- SECItem *profile = NULL;
- NSSCMSAttribute *attr;
- SECItem *utc_stime = NULL;
- SECItem *ekp;
- CERTCertDBHandle *certdb;
- int save_error;
- SECStatus rv;
- certdb = CERT_GetDefaultCertDB();
- /* sanity check - see if verification status is ok (unverified does not count...) */
- if (signerinfo->verificationStatus != NSSCMSVS_GoodSignature)
- return SECFailure;
- /* find preferred encryption cert */
- if (!NSS_CMSArray_IsEmpty((void **)signerinfo->authAttr) &&
- (attr = NSS_CMSAttributeArray_FindAttrByOidTag(signerinfo->authAttr,
- SEC_OID_SMIME_ENCRYPTION_KEY_PREFERENCE, PR_TRUE)) != NULL)
- { /* we have a SMIME_ENCRYPTION_KEY_PREFERENCE attribute! */
- ekp = NSS_CMSAttribute_GetValue(attr);
- if (ekp == NULL)
- return SECFailure;
- /* we assume that all certs coming with the message have been imported to the */
- /* temporary database */
- cert = NSS_SMIMEUtil_GetCertFromEncryptionKeyPreference(certdb, ekp);
- if (cert == NULL)
- return SECFailure;
- }
- if (cert == NULL) {
- /* no preferred cert found?
- * find the cert the signerinfo is signed with instead */
- cert = NSS_CMSSignerInfo_GetSigningCertificate(signerinfo, certdb);
- if (cert == NULL || cert->emailAddr == NULL)
- return SECFailure;
- }
- /* verify this cert for encryption (has been verified for signing so far) */
- if (CERT_VerifyCert(certdb, cert, PR_TRUE, certUsageEmailRecipient, PR_Now(), signerinfo->cmsg->pwfn_arg, NULL) != SECSuccess) {
- return SECFailure;
- }
- /* XXX store encryption cert permanently? */
- /*
- * Remember the current error set because we do not care about
- * anything set by the functions we are about to call.
- */
- save_error = PORT_GetError();
- if (!NSS_CMSArray_IsEmpty((void **)signerinfo->authAttr)) {
- attr = NSS_CMSAttributeArray_FindAttrByOidTag(signerinfo->authAttr,
- SEC_OID_PKCS9_SMIME_CAPABILITIES,
- PR_TRUE);
- profile = NSS_CMSAttribute_GetValue(attr);
- attr = NSS_CMSAttributeArray_FindAttrByOidTag(signerinfo->authAttr,
- SEC_OID_PKCS9_SIGNING_TIME,
- PR_TRUE);
- utc_stime = NSS_CMSAttribute_GetValue(attr);
- }
- rv = CERT_SaveSMimeProfile (cert, profile, utc_stime);
- /*
- * Restore the saved error in case the calls above set a new
- * one that we do not actually care about.
- */
- PORT_SetError (save_error);
- return rv;
- }
- /*
- * NSS_CMSSignerInfo_IncludeCerts - set cert chain inclusion mode for this signer
- */
- SECStatus
- NSS_CMSSignerInfo_IncludeCerts(NSSCMSSignerInfo *signerinfo, NSSCMSCertChainMode cm, SECCertUsage usage)
- {
- if (signerinfo->cert == NULL)
- return SECFailure;
- switch (cm) {
- case NSSCMSCM_None:
- signerinfo->certList = NULL;
- break;
- case NSSCMSCM_CertOnly:
- signerinfo->certList = CERT_CertListFromCert(signerinfo->cert);
- break;
- case NSSCMSCM_CertChain:
- signerinfo->certList = CERT_CertChainFromCert(signerinfo->cert, usage, PR_FALSE);
- break;
- case NSSCMSCM_CertChainWithRoot:
- signerinfo->certList = CERT_CertChainFromCert(signerinfo->cert, usage, PR_TRUE);
- break;
- }
- if (cm != NSSCMSCM_None && signerinfo->certList == NULL)
- return SECFailure;
-
- return SECSuccess;
- }