OSStatus
SecCmsSignedDataAddSignerInfo(SecCmsSignedDataRef sigd,
SecCmsSignerInfoRef signerinfo)
{
void *mark;
OSStatus rv;
SECOidTag digestalgtag;
PLArenaPool *poolp;
poolp = sigd->cmsg->poolp;
mark = PORT_ArenaMark(poolp);
/* add signerinfo */
rv = SecCmsArrayAdd(poolp, (void ***)&(sigd->signerInfos), (void *)signerinfo);
if (rv != SECSuccess)
goto loser;
signerinfo->sigd = sigd;
/*
* 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 = SecCmsSignerInfoGetDigestAlgTag(signerinfo);
rv = SecCmsSignedDataSetDigestValue(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;
}
/*
* SecCmsSignedDataEncodeBeforeStart - 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.
*/
OSStatus
SecCmsSignedDataEncodeBeforeStart(SecCmsSignedDataRef sigd)
{
SecCmsSignerInfoRef signerinfo;
SECOidTag digestalgtag;
CSSM_DATA_PTR dummy;
int version;
OSStatus rv;
Boolean 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 = SEC_CMS_SIGNED_DATA_VERSION_BASIC;
/* RFC2630 5.1 "version is the syntax version number..." */
if (SecCmsContentInfoGetContentTypeTag(&(sigd->contentInfo)) != SEC_OID_PKCS7_DATA)
version = SEC_CMS_SIGNED_DATA_VERSION_EXT;
/* prepare all the SignerInfos (there may be none) */
for (i=0; i < SecCmsSignedDataSignerInfoCount(sigd); i++) {
signerinfo = SecCmsSignedDataGetSignerInfo(sigd, i);
/* RFC2630 5.1 "version is the syntax version number..." */
if (SecCmsSignerInfoGetVersion(signerinfo) != SEC_CMS_SIGNER_INFO_VERSION_ISSUERSN)
version = SEC_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 = SecCmsSignerInfoGetDigestAlgTag(signerinfo);
n = SecCmsAlgArrayGetIndexByAlgTag(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 = SecCmsSignedDataAddDigest((SecArenaPoolRef)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 = SecCmsArraySortByDER((void **)sigd->digestAlgorithms,
SEC_ASN1_GET(SECOID_AlgorithmIDTemplate),
(void **)sigd->digests);
if (rv != SECSuccess)
return SECFailure;
return SECSuccess;
loser:
return SECFailure;
}
/*
* SecCmsSignedDataEncodeAfterData - 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.
*/
OSStatus
SecCmsSignedDataEncodeAfterData(SecCmsSignedDataRef sigd)
{
SecCmsSignerInfoRef *signerinfos, signerinfo;
SecCmsContentInfoRef cinfo;
SECOidTag digestalgtag;
OSStatus ret = SECFailure;
OSStatus rv;
CSSM_DATA_PTR contentType;
int certcount;
int i, ci, n, rci, si;
PLArenaPool *poolp;
CFArrayRef certlist;
extern const SecAsn1Template SecCmsSignerInfoTemplate[];
poolp = sigd->cmsg->poolp;
cinfo = &(sigd->contentInfo);
/* did we have digest calculation going on? */
if (cinfo->digcx) {
rv = SecCmsDigestContextFinishMultiple(cinfo->digcx, (SecArenaPoolRef)poolp, &(sigd->digests));
if (rv != SECSuccess)
goto loser; /* error has been set by SecCmsDigestContextFinishMultiple */
cinfo->digcx = NULL;
}
signerinfos = sigd->signerInfos;
certcount = 0;
/* prepare all the SignerInfos (there may be none) */
for (i=0; i < SecCmsSignedDataSignerInfoCount(sigd); i++) {
signerinfo = SecCmsSignedDataGetSignerInfo(sigd, i);
/* find correct digest for this signerinfo */
digestalgtag = SecCmsSignerInfoGetDigestAlgTag(signerinfo);
n = SecCmsAlgArrayGetIndexByAlgTag(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 = SecCmsContentInfoGetContentTypeOID(cinfo)) == NULL)
goto loser;
/* sign the thing */
rv = SecCmsSignerInfoSign(signerinfo, sigd->digests[n], contentType);
if (rv != SECSuccess)
goto loser;
/* while we're at it, count number of certs in certLists */
certlist = SecCmsSignerInfoGetCertList(signerinfo);
if (certlist)
certcount += CFArrayGetCount(certlist);
}
/* Now we can get a timestamp, since we have all the digests */
// We force the setting of a callback, since this is the most usual case
if (!sigd->cmsg->tsaCallback)
SecCmsMessageSetTSACallback(sigd->cmsg, (SecCmsTSACallback)SecCmsTSADefaultCallback);
if (sigd->cmsg->tsaCallback && sigd->cmsg->tsaContext)
{
CSSM_DATA tsaResponse = {0,};
SecAsn1TSAMessageImprint messageImprint = {{{0},},{0,}};
// <rdar://problem/11073466> Add nonce support for timestamping client
uint64_t nonce = 0;
require_noerr(getRandomNonce(&nonce), tsxit);
dprintf("SecCmsSignedDataSignerInfoCount: %d\n", SecCmsSignedDataSignerInfoCount(sigd));
// Calculate hash of encDigest and put in messageImprint.hashedMessage
SecCmsSignerInfoRef signerinfo = SecCmsSignedDataGetSignerInfo(sigd, 0); // NB - assume 1 signer only!
CSSM_DATA *encDigest = SecCmsSignerInfoGetEncDigest(signerinfo);
require_noerr(createTSAMessageImprint(sigd, encDigest, &messageImprint), tsxit);
// Callback to fire up XPC service to talk to TimeStamping server, etc.
require_noerr(rv =(*sigd->cmsg->tsaCallback)(sigd->cmsg->tsaContext, &messageImprint,
nonce, &tsaResponse), tsxit);
require_noerr(rv = validateTSAResponseAndAddTimeStamp(signerinfo, &tsaResponse, nonce), tsxit);
/*
It is likely that every occurrence of "goto loser" in this file should
also do a PORT_SetError. Since it is not clear what might depend on this
behavior, we just do this in the timestamping case.
*/
tsxit:
if (rv)
{
dprintf("Original timestamp error: %d\n", (int)rv);
rv = remapTimestampError(rv);
PORT_SetError(rv);
goto loser;
}
}
/* this is a SET OF, so we need to sort them guys */
rv = SecCmsArraySortByDER((void **)signerinfos, SecCmsSignerInfoTemplate, NULL);
if (rv != SECSuccess)
goto loser;
/*
* now prepare certs & crls
*/
/* count the rest of the certs */
if (sigd->certs != NULL)
certcount += CFArrayGetCount(sigd->certs);
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 = (CSSM_DATA_PTR *)PORT_ArenaAlloc(poolp, (certcount + 1) * sizeof(CSSM_DATA_PTR));
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 < CFArrayGetCount(signerinfo->certList); ci++) {
sigd->rawCerts[rci] = PORT_ArenaZAlloc(poolp, sizeof(CSSM_DATA));
SecCertificateRef cert = (SecCertificateRef)CFArrayGetValueAtIndex(signerinfo->certList, ci);
SecCertificateGetData(cert, sigd->rawCerts[rci++]);
}
}
}
if (sigd->certs != NULL) {
for (ci = 0; ci < CFArrayGetCount(sigd->certs); ci++) {
sigd->rawCerts[rci] = PORT_ArenaZAlloc(poolp, sizeof(CSSM_DATA));
SecCertificateRef cert = (SecCertificateRef)CFArrayGetValueAtIndex(sigd->certs, ci);
SecCertificateGetData(cert, sigd->rawCerts[rci++]);
}
}
sigd->rawCerts[rci] = NULL;
/* this is a SET OF, so we need to sort them guys - we have the DER already, though */
SecCmsArraySort((void **)sigd->rawCerts, SecCmsUtilDERCompare, NULL, NULL);
}
ret = SECSuccess;
loser:
dprintf("SecCmsSignedDataEncodeAfterData: ret: %ld, rv: %ld\n", (long)ret, (long)rv);
return ret;
}
/*
* SecCmsSignerInfoSign - sign something
*
*/
OSStatus
SecCmsSignerInfoSign(SecCmsSignerInfoRef signerinfo, CSSM_DATA_PTR digest, CSSM_DATA_PTR contentType)
{
SecCertificateRef cert;
SecPrivateKeyRef privkey = NULL;
SECOidTag digestalgtag;
SECOidTag pubkAlgTag;
CSSM_DATA signature = { 0 };
OSStatus rv;
PLArenaPool *poolp, *tmppoolp = NULL;
const SECAlgorithmID *algID;
SECAlgorithmID freeAlgID;
//CERTSubjectPublicKeyInfo *spki;
PORT_Assert (digest != NULL);
poolp = signerinfo->cmsg->poolp;
switch (signerinfo->signerIdentifier.identifierType) {
case SecCmsSignerIDIssuerSN:
privkey = signerinfo->signingKey;
signerinfo->signingKey = NULL;
cert = signerinfo->cert;
if (SecCertificateGetAlgorithmID(cert,&algID)) {
PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
goto loser;
}
break;
case SecCmsSignerIDSubjectKeyID:
privkey = signerinfo->signingKey;
signerinfo->signingKey = NULL;
#if 0
spki = SECKEY_CreateSubjectPublicKeyInfo(signerinfo->pubKey);
SECKEY_DestroyPublicKey(signerinfo->pubKey);
signerinfo->pubKey = NULL;
SECOID_CopyAlgorithmID(NULL, &freeAlgID, &spki->algorithm);
SECKEY_DestroySubjectPublicKeyInfo(spki);
algID = &freeAlgID;
#else
#if (TARGET_OS_MAC && !(TARGET_OS_EMBEDDED || TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR))
if (SecKeyGetAlgorithmID(signerinfo->pubKey,&algID)) {
#else
/* TBD: Unify this code. Currently, iOS has an incompatible
* SecKeyGetAlgorithmID implementation. */
if (true) {
#endif
PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
goto loser;
}
CFRelease(signerinfo->pubKey);
signerinfo->pubKey = NULL;
#endif
break;
default:
PORT_SetError(SEC_ERROR_UNSUPPORTED_MESSAGE_TYPE);
goto loser;
}
digestalgtag = SecCmsSignerInfoGetDigestAlgTag(signerinfo);
/*
* XXX I think there should be a cert-level interface for this,
* so that I do not have to know about subjectPublicKeyInfo...
*/
pubkAlgTag = SECOID_GetAlgorithmTag(algID);
if (signerinfo->signerIdentifier.identifierType == SecCmsSignerIDSubjectKeyID) {
SECOID_DestroyAlgorithmID(&freeAlgID, PR_FALSE);
}
#if 0
// @@@ Not yet
/* Fortezza MISSI have weird signature formats.
* Map them to standard DSA formats
*/
pubkAlgTag = PK11_FortezzaMapSig(pubkAlgTag);
#endif
if (signerinfo->authAttr != NULL) {
CSSM_DATA encoded_attrs;
/* find and fill in the message digest attribute. */
rv = SecCmsAttributeArraySetAttr(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 = SecCmsAttributeArraySetAttr(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 (SecCmsAttributeArrayReorder(signerinfo->authAttr) != SECSuccess)
goto loser;
encoded_attrs.Data = NULL;
encoded_attrs.Length = 0;
if (SecCmsAttributeArrayEncode(tmppoolp, &(signerinfo->authAttr),
&encoded_attrs) == NULL)
goto loser;
rv = SEC_SignData(&signature, encoded_attrs.Data, (int)encoded_attrs.Length,
privkey, digestalgtag, pubkAlgTag);
PORT_FreeArena(tmppoolp, PR_FALSE); /* awkward memory management :-( */
tmppoolp = 0;
} else {
rv = SGN_Digest(privkey, digestalgtag, pubkAlgTag, &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(pubkAlgTag == SEC_OID_EC_PUBLIC_KEY) {
/*
* RFC 3278 section section 2.1.1 states that the signatureAlgorithm
* field contains the full ecdsa-with-SHA1 OID, not plain old ecPublicKey
* as would appear in other forms of signed datas. However Microsoft doesn't
* do this, it puts ecPublicKey there, and if we put ecdsa-with-SHA1 there,
* MS can't verify - presumably because it takes the digest of the digest
* before feeding it to ECDSA.
* We handle this with a preference; default if it's not there is
* "Microsoft compatibility mode".
*/
if(!SecCmsMsEcdsaCompatMode()) {
pubkAlgTag = SEC_OID_ECDSA_WithSHA1;
}
/* else violating the spec for compatibility */
}
if (SECOID_SetAlgorithmID(poolp, &(signerinfo->digestEncAlg), pubkAlgTag,
NULL) != SECSuccess)
goto loser;
return SECSuccess;
loser:
if (signature.Length != 0)
SECITEM_FreeItem (&signature, PR_FALSE);
if (privkey)
SECKEY_DestroyPrivateKey(privkey);
if (tmppoolp)
PORT_FreeArena(tmppoolp, PR_FALSE);
return SECFailure;
}
OSStatus
SecCmsSignerInfoVerifyCertificate(SecCmsSignerInfoRef signerinfo, SecKeychainRef keychainOrArray,
CFTypeRef policies, SecTrustRef *trustRef)
{
SecCertificateRef cert;
CFAbsoluteTime stime;
OSStatus rv;
CSSM_DATA_PTR *otherCerts;
if ((cert = SecCmsSignerInfoGetSigningCertificate(signerinfo, keychainOrArray)) == NULL) {
dprintf("SecCmsSignerInfoVerifyCertificate: no signing cert\n");
signerinfo->verificationStatus = SecCmsVSSigningCertNotFound;
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.
*/
CFTypeRef timeStampPolicies=SecPolicyCreateAppleTimeStampingAndRevocationPolicies(policies);
if (SecCmsSignerInfoGetTimestampTimeWithPolicy(signerinfo, timeStampPolicies, &stime) != SECSuccess)
if (SecCmsSignerInfoGetSigningTime(signerinfo, &stime) != SECSuccess)
stime = CFAbsoluteTimeGetCurrent();
CFReleaseSafe(timeStampPolicies);
rv = SecCmsSignedDataRawCerts(signerinfo->sigd, &otherCerts);
if(rv) {
return rv;
}
rv = CERT_VerifyCert(keychainOrArray, cert, otherCerts, policies, stime, trustRef);
dprintfRC("SecCmsSignerInfoVerifyCertificate after vfy: certp %p cert.rc %d\n",
cert, (int)CFGetRetainCount(cert));
if (rv || !trustRef)
{
if (PORT_GetError() == SEC_ERROR_UNTRUSTED_CERT)
{
/* Signature or digest level verificationStatus errors should supercede certificate level errors, so only change the verificationStatus if the status was GoodSignature. */
if (signerinfo->verificationStatus == SecCmsVSGoodSignature)
signerinfo->verificationStatus = SecCmsVSSigningCertNotTrusted;
}
}
/* FIXME isn't this leaking the cert? */
dprintf("SecCmsSignerInfoVerifyCertificate: CertVerify rtn %d\n", (int)rv);
return rv;
}
