SECStatus
NSS_CMSSignedData_AddSignerInfo(NSSCMSSignedData *sigd,
NSSCMSSignerInfo *signerinfo)
{
void *mark;
SECStatus rv;
SECOidTag digestalgtag;
PLArenaPool *poolp;
if (!sigd || !signerinfo) {
PORT_SetError(SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
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;
}
NS_IMETHODIMP nsCMSMessage::CreateSigned(nsIX509Cert* aSigningCert, nsIX509Cert* aEncryptCert, unsigned char* aDigestData, PRUint32 aDigestDataLen)
{
nsNSSShutDownPreventionLock locker;
if (isAlreadyShutDown())
return NS_ERROR_NOT_AVAILABLE;
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CreateSigned\n"));
NSSCMSContentInfo *cinfo;
NSSCMSSignedData *sigd;
NSSCMSSignerInfo *signerinfo;
CERTCertificate *scert = nsnull, *ecert = nsnull;
nsCOMPtr<nsIX509Cert2> aSigningCert2 = do_QueryInterface(aSigningCert);
nsresult rv = NS_ERROR_FAILURE;
/* Get the certs */
if (aSigningCert2) {
scert = aSigningCert2->GetCert();
}
if (!scert) {
return NS_ERROR_FAILURE;
}
if (aEncryptCert) {
nsCOMPtr<nsIX509Cert2> aEncryptCert2 = do_QueryInterface(aEncryptCert);
if (aEncryptCert2) {
ecert = aEncryptCert2->GetCert();
}
}
CERTCertificateCleaner ecertCleaner(ecert);
CERTCertificateCleaner scertCleaner(scert);
/*
* create the message object
*/
m_cmsMsg = NSS_CMSMessage_Create(NULL); /* create a message on its own pool */
if (m_cmsMsg == NULL) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CreateSigned - can't create new message\n"));
rv = NS_ERROR_OUT_OF_MEMORY;
goto loser;
}
/*
* build chain of objects: message->signedData->data
*/
if ((sigd = NSS_CMSSignedData_Create(m_cmsMsg)) == NULL) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CreateSigned - can't create signed data\n"));
goto loser;
}
cinfo = NSS_CMSMessage_GetContentInfo(m_cmsMsg);
if (NSS_CMSContentInfo_SetContent_SignedData(m_cmsMsg, cinfo, sigd)
!= SECSuccess) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CreateSigned - can't set content signed data\n"));
goto loser;
}
cinfo = NSS_CMSSignedData_GetContentInfo(sigd);
/* we're always passing data in and detaching optionally */
if (NSS_CMSContentInfo_SetContent_Data(m_cmsMsg, cinfo, nsnull, PR_TRUE)
!= SECSuccess) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CreateSigned - can't set content data\n"));
goto loser;
}
/*
* create & attach signer information
*/
if ((signerinfo = NSS_CMSSignerInfo_Create(m_cmsMsg, scert, SEC_OID_SHA1))
== NULL) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CreateSigned - can't create signer info\n"));
goto loser;
}
/* we want the cert chain included for this one */
if (NSS_CMSSignerInfo_IncludeCerts(signerinfo, NSSCMSCM_CertChain,
certUsageEmailSigner)
!= SECSuccess) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CreateSigned - can't include signer cert chain\n"));
goto loser;
}
if (NSS_CMSSignerInfo_AddSigningTime(signerinfo, PR_Now())
!= SECSuccess) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CreateSigned - can't add signing time\n"));
goto loser;
}
if (NSS_CMSSignerInfo_AddSMIMECaps(signerinfo) != SECSuccess) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CreateSigned - can't add smime caps\n"));
goto loser;
}
if (ecert) {
if (NSS_CMSSignerInfo_AddSMIMEEncKeyPrefs(signerinfo, ecert,
CERT_GetDefaultCertDB())
!= SECSuccess) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CreateSigned - can't add smime enc key prefs\n"));
goto loser;
}
if (NSS_CMSSignerInfo_AddMSSMIMEEncKeyPrefs(signerinfo, ecert,
CERT_GetDefaultCertDB())
!= SECSuccess) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CreateSigned - can't add MS smime enc key prefs\n"));
goto loser;
}
// If signing and encryption cert are identical, don't add it twice.
PRBool addEncryptionCert =
(ecert && (!scert || !CERT_CompareCerts(ecert, scert)));
if (addEncryptionCert &&
NSS_CMSSignedData_AddCertificate(sigd, ecert) != SECSuccess) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CreateSigned - can't add own encryption certificate\n"));
goto loser;
}
}
if (NSS_CMSSignedData_AddSignerInfo(sigd, signerinfo) != SECSuccess) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CreateSigned - can't add signer info\n"));
goto loser;
}
// Finally, add the pre-computed digest if passed in
if (aDigestData) {
SECItem digest;
digest.data = aDigestData;
digest.len = aDigestDataLen;
if (NSS_CMSSignedData_SetDigestValue(sigd, SEC_OID_SHA1, &digest)) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CreateSigned - can't set digest value\n"));
goto loser;
}
}
return NS_OK;
loser:
if (m_cmsMsg) {
NSS_CMSMessage_Destroy(m_cmsMsg);
m_cmsMsg = nsnull;
}
return rv;
}
nsresult nsCMSMessage::CommonVerifySignature(unsigned char* aDigestData, PRUint32 aDigestDataLen)
{
nsNSSShutDownPreventionLock locker;
if (isAlreadyShutDown())
return NS_ERROR_NOT_AVAILABLE;
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature, content level count %d\n", NSS_CMSMessage_ContentLevelCount(m_cmsMsg)));
NSSCMSContentInfo *cinfo = nsnull;
NSSCMSSignedData *sigd = nsnull;
NSSCMSSignerInfo *si;
PRInt32 nsigners;
nsresult rv = NS_ERROR_FAILURE;
if (!NSS_CMSMessage_IsSigned(m_cmsMsg)) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature - not signed\n"));
return NS_ERROR_CMS_VERIFY_NOT_SIGNED;
}
cinfo = NSS_CMSMessage_ContentLevel(m_cmsMsg, 0);
if (cinfo) {
// I don't like this hard cast. We should check in some way, that we really have this type.
sigd = (NSSCMSSignedData*)NSS_CMSContentInfo_GetContent(cinfo);
}
if (!sigd) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature - no content info\n"));
rv = NS_ERROR_CMS_VERIFY_NO_CONTENT_INFO;
goto loser;
}
if (aDigestData && aDigestDataLen)
{
SECItem digest;
digest.data = aDigestData;
digest.len = aDigestDataLen;
if (NSS_CMSSignedData_SetDigestValue(sigd, SEC_OID_SHA1, &digest)) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature - bad digest\n"));
rv = NS_ERROR_CMS_VERIFY_BAD_DIGEST;
goto loser;
}
}
// Import certs. Note that import failure is not a signature verification failure. //
if (NSS_CMSSignedData_ImportCerts(sigd, CERT_GetDefaultCertDB(), certUsageEmailRecipient, PR_TRUE) != SECSuccess) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature - can not import certs\n"));
}
nsigners = NSS_CMSSignedData_SignerInfoCount(sigd);
PR_ASSERT(nsigners > 0);
si = NSS_CMSSignedData_GetSignerInfo(sigd, 0);
// See bug 324474. We want to make sure the signing cert is
// still valid at the current time.
if (CERT_VerifyCertificateNow(CERT_GetDefaultCertDB(), si->cert, PR_TRUE,
certificateUsageEmailSigner,
si->cmsg->pwfn_arg, NULL) != SECSuccess) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature - signing cert not trusted now\n"));
rv = NS_ERROR_CMS_VERIFY_UNTRUSTED;
goto loser;
}
// We verify the first signer info, only //
if (NSS_CMSSignedData_VerifySignerInfo(sigd, 0, CERT_GetDefaultCertDB(), certUsageEmailSigner) != SECSuccess) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature - unable to verify signature\n"));
if (NSSCMSVS_SigningCertNotFound == si->verificationStatus) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature - signing cert not found\n"));
rv = NS_ERROR_CMS_VERIFY_NOCERT;
}
else if(NSSCMSVS_SigningCertNotTrusted == si->verificationStatus) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature - signing cert not trusted at signing time\n"));
rv = NS_ERROR_CMS_VERIFY_UNTRUSTED;
}
else if(NSSCMSVS_Unverified == si->verificationStatus) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature - can not verify\n"));
rv = NS_ERROR_CMS_VERIFY_ERROR_UNVERIFIED;
}
else if(NSSCMSVS_ProcessingError == si->verificationStatus) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature - processing error\n"));
rv = NS_ERROR_CMS_VERIFY_ERROR_PROCESSING;
}
else if(NSSCMSVS_BadSignature == si->verificationStatus) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature - bad signature\n"));
rv = NS_ERROR_CMS_VERIFY_BAD_SIGNATURE;
}
else if(NSSCMSVS_DigestMismatch == si->verificationStatus) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature - digest mismatch\n"));
rv = NS_ERROR_CMS_VERIFY_DIGEST_MISMATCH;
}
else if(NSSCMSVS_SignatureAlgorithmUnknown == si->verificationStatus) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature - algo unknown\n"));
rv = NS_ERROR_CMS_VERIFY_UNKNOWN_ALGO;
}
else if(NSSCMSVS_SignatureAlgorithmUnsupported == si->verificationStatus) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature - algo not supported\n"));
rv = NS_ERROR_CMS_VERIFY_UNSUPPORTED_ALGO;
}
else if(NSSCMSVS_MalformedSignature == si->verificationStatus) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature - malformed signature\n"));
rv = NS_ERROR_CMS_VERIFY_MALFORMED_SIGNATURE;
}
goto loser;
}
// Save the profile. Note that save import failure is not a signature verification failure. //
if (NSS_SMIMESignerInfo_SaveSMIMEProfile(si) != SECSuccess) {
PR_LOG(gPIPNSSLog, PR_LOG_DEBUG, ("nsCMSMessage::CommonVerifySignature - unable to save smime profile\n"));
}
rv = NS_OK;
loser:
return rv;
}
nsresult
VerifyCMSDetachedSignatureIncludingCertificate(
const SECItem& buffer, const SECItem& detachedDigest,
nsresult (*verifyCertificate)(CERTCertificate* cert, void* context,
void* pinArg),
void *verifyCertificateContext, void* pinArg)
{
// XXX: missing pinArg is tolerated.
if (NS_WARN_IF(!buffer.data && buffer.len > 0) ||
NS_WARN_IF(!detachedDigest.data && detachedDigest.len > 0) ||
(!verifyCertificate) ||
NS_WARN_IF(!verifyCertificateContext)) {
return NS_ERROR_INVALID_ARG;
}
ScopedNSSCMSMessage
cmsMsg(NSS_CMSMessage_CreateFromDER(const_cast<SECItem*>(&buffer), nullptr,
nullptr, nullptr, nullptr, nullptr,
nullptr));
if (!cmsMsg) {
return NS_ERROR_CMS_VERIFY_ERROR_PROCESSING;
}
if (!NSS_CMSMessage_IsSigned(cmsMsg.get())) {
return NS_ERROR_CMS_VERIFY_NOT_SIGNED;
}
NSSCMSContentInfo* cinfo = NSS_CMSMessage_ContentLevel(cmsMsg.get(), 0);
if (!cinfo) {
return NS_ERROR_CMS_VERIFY_NO_CONTENT_INFO;
}
// signedData is non-owning
NSSCMSSignedData* signedData =
reinterpret_cast<NSSCMSSignedData*>(NSS_CMSContentInfo_GetContent(cinfo));
if (!signedData) {
return NS_ERROR_CMS_VERIFY_NO_CONTENT_INFO;
}
// Set digest value.
if (NSS_CMSSignedData_SetDigestValue(signedData, SEC_OID_SHA1,
const_cast<SECItem*>(&detachedDigest))) {
return NS_ERROR_CMS_VERIFY_BAD_DIGEST;
}
// Parse the certificates into CERTCertificate objects held in memory so
// verifyCertificate will be able to find them during path building.
ScopedCERTCertList certs(CERT_NewCertList());
if (!certs) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (signedData->rawCerts) {
for (size_t i = 0; signedData->rawCerts[i]; ++i) {
ScopedCERTCertificate
cert(CERT_NewTempCertificate(CERT_GetDefaultCertDB(),
signedData->rawCerts[i], nullptr, false,
true));
// Skip certificates that fail to parse
if (cert) {
if (CERT_AddCertToListTail(certs.get(), cert.get()) == SECSuccess) {
cert.forget(); // ownership transfered
} else {
return NS_ERROR_OUT_OF_MEMORY;
}
}
}
}
// Get the end-entity certificate.
int numSigners = NSS_CMSSignedData_SignerInfoCount(signedData);
if (NS_WARN_IF(numSigners != 1)) {
return NS_ERROR_CMS_VERIFY_ERROR_PROCESSING;
}
// signer is non-owning.
NSSCMSSignerInfo* signer = NSS_CMSSignedData_GetSignerInfo(signedData, 0);
if (NS_WARN_IF(!signer)) {
return NS_ERROR_CMS_VERIFY_ERROR_PROCESSING;
}
CERTCertificate* signerCert =
NSS_CMSSignerInfo_GetSigningCertificate(signer, CERT_GetDefaultCertDB());
if (!signerCert) {
return NS_ERROR_CMS_VERIFY_ERROR_PROCESSING;
}
nsresult rv = verifyCertificate(signerCert, verifyCertificateContext, pinArg);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// See NSS_CMSContentInfo_GetContentTypeOID, which isn't exported from NSS.
SECOidData* contentTypeOidData =
SECOID_FindOID(&signedData->contentInfo.contentType);
if (!contentTypeOidData) {
return NS_ERROR_CMS_VERIFY_ERROR_PROCESSING;
}
return MapSECStatus(NSS_CMSSignerInfo_Verify(signer,
const_cast<SECItem*>(&detachedDigest),
&contentTypeOidData->oid));
}
