/********************************************************************
*
* s i g n _ c e r t
*/
static SECItem *
sign_cert(CERTCertificate *cert, SECKEYPrivateKey *privk)
{
SECStatus rv;
SECItem der2;
SECItem * result2;
void *dummy;
SECOidTag alg = SEC_OID_UNKNOWN;
alg = SEC_GetSignatureAlgorithmOidTag(privk->keyType, SEC_OID_UNKNOWN);
if (alg == SEC_OID_UNKNOWN) {
FatalError("Unknown key type");
}
rv = SECOID_SetAlgorithmID (cert->arena, &cert->signature, alg, 0);
if (rv != SECSuccess) {
PR_fprintf(errorFD, "%s: unable to set signature alg id\n",
PROGRAM_NAME);
errorCount++;
exit (ERRX);
}
der2.len = 0;
der2.data = NULL;
dummy = SEC_ASN1EncodeItem
(cert->arena, &der2, cert, SEC_ASN1_GET(CERT_CertificateTemplate));
if (rv != SECSuccess) {
PR_fprintf(errorFD, "%s: error encoding cert\n", PROGRAM_NAME);
errorCount++;
exit (ERRX);
}
result2 = (SECItem * ) PORT_ArenaZAlloc (cert->arena, sizeof (SECItem));
if (result2 == NULL)
out_of_memory();
rv = SEC_DerSignData
(cert->arena, result2, der2.data, der2.len, privk, alg);
if (rv != SECSuccess) {
PR_fprintf(errorFD, "can't sign encoded certificate data\n");
errorCount++;
exit (ERRX);
} else if (verbosity >= 0) {
PR_fprintf(outputFD, "certificate has been signed\n");
}
cert->derCert = *result2;
return result2;
}
nsresult
nsKeygenFormProcessor::GetPublicKey(const nsAString& aValue,
const nsAString& aChallenge,
const nsAFlatString& aKeyType,
nsAString& aOutPublicKey,
const nsAString& aKeyParams)
{
nsNSSShutDownPreventionLock locker;
if (isAlreadyShutDown()) {
return NS_ERROR_NOT_AVAILABLE;
}
nsresult rv = NS_ERROR_FAILURE;
char *keystring = nullptr;
char *keyparamsString = nullptr;
uint32_t keyGenMechanism;
PK11SlotInfo *slot = nullptr;
PK11RSAGenParams rsaParams;
SECOidTag algTag;
int keysize = 0;
void *params = nullptr;
SECKEYPrivateKey *privateKey = nullptr;
SECKEYPublicKey *publicKey = nullptr;
CERTSubjectPublicKeyInfo *spkInfo = nullptr;
SECStatus srv = SECFailure;
SECItem spkiItem;
SECItem pkacItem;
SECItem signedItem;
CERTPublicKeyAndChallenge pkac;
pkac.challenge.data = nullptr;
nsIGeneratingKeypairInfoDialogs * dialogs;
nsKeygenThread *KeygenRunnable = 0;
nsCOMPtr<nsIKeygenThread> runnable;
// permanent and sensitive flags for keygen
PK11AttrFlags attrFlags = PK11_ATTR_TOKEN | PK11_ATTR_SENSITIVE | PK11_ATTR_PRIVATE;
UniquePLArenaPool arena(PORT_NewArena(DER_DEFAULT_CHUNKSIZE));
if (!arena) {
goto loser;
}
// Get the key size //
for (size_t i = 0; i < number_of_key_size_choices; ++i) {
if (aValue.Equals(mSECKeySizeChoiceList[i].name)) {
keysize = mSECKeySizeChoiceList[i].size;
break;
}
}
if (!keysize) {
goto loser;
}
// Set the keygen mechanism
if (aKeyType.IsEmpty() || aKeyType.LowerCaseEqualsLiteral("rsa")) {
keyGenMechanism = CKM_RSA_PKCS_KEY_PAIR_GEN;
} else if (aKeyType.LowerCaseEqualsLiteral("ec")) {
keyparamsString = ToNewCString(aKeyParams);
if (!keyparamsString) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto loser;
}
keyGenMechanism = CKM_EC_KEY_PAIR_GEN;
/* ecParams are initialized later */
} else {
goto loser;
}
// Get the slot
rv = GetSlot(keyGenMechanism, &slot);
if (NS_FAILED(rv)) {
goto loser;
}
switch (keyGenMechanism) {
case CKM_RSA_PKCS_KEY_PAIR_GEN:
rsaParams.keySizeInBits = keysize;
rsaParams.pe = DEFAULT_RSA_KEYGEN_PE;
algTag = DEFAULT_RSA_KEYGEN_ALG;
params = &rsaParams;
break;
case CKM_EC_KEY_PAIR_GEN:
/* XXX We ought to rethink how the KEYGEN tag is
* displayed. The pulldown selections presented
* to the user must depend on the keytype.
* The displayed selection could be picked
* from the keyparams attribute (this is currently called
* the pqg attribute).
* For now, we pick ecparams from the keyparams field
* if it specifies a valid supported curve, or else
* we pick one of secp384r1, secp256r1 or secp192r1
* respectively depending on the user's selection
* (High, Medium, Low).
* (RSA uses RSA-2048, RSA-1024 and RSA-512 for historical
* reasons, while ECC choices represent a stronger mapping)
* NOTE: The user's selection
* is silently ignored when a valid curve is presented
* in keyparams.
*/
if ((params = decode_ec_params(keyparamsString)) == nullptr) {
/* The keyparams attribute did not specify a valid
* curve name so use a curve based on the keysize.
* NOTE: Here keysize is used only as an indication of
* High/Medium/Low strength; elliptic curve
* cryptography uses smaller keys than RSA to provide
* equivalent security.
*/
switch (keysize) {
case 2048:
params = decode_ec_params("secp384r1");
break;
case 1024:
case 512:
params = decode_ec_params("secp256r1");
break;
}
}
/* XXX The signature algorithm ought to choose the hashing
* algorithm based on key size once ECDSA variations based
* on SHA256 SHA384 and SHA512 are standardized.
*/
algTag = SEC_OID_ANSIX962_ECDSA_SIGNATURE_WITH_SHA1_DIGEST;
break;
default:
goto loser;
}
/* Make sure token is initialized. */
rv = setPassword(slot, m_ctx, locker);
if (NS_FAILED(rv))
goto loser;
srv = PK11_Authenticate(slot, true, m_ctx);
if (srv != SECSuccess) {
goto loser;
}
rv = getNSSDialogs((void**)&dialogs,
NS_GET_IID(nsIGeneratingKeypairInfoDialogs),
NS_GENERATINGKEYPAIRINFODIALOGS_CONTRACTID);
if (NS_SUCCEEDED(rv)) {
KeygenRunnable = new nsKeygenThread();
NS_IF_ADDREF(KeygenRunnable);
}
if (NS_FAILED(rv) || !KeygenRunnable) {
rv = NS_OK;
privateKey = PK11_GenerateKeyPairWithFlags(slot, keyGenMechanism, params,
&publicKey, attrFlags, m_ctx);
} else {
KeygenRunnable->SetParams( slot, attrFlags, nullptr, 0,
keyGenMechanism, params, m_ctx );
runnable = do_QueryInterface(KeygenRunnable);
if (runnable) {
rv = dialogs->DisplayGeneratingKeypairInfo(m_ctx, runnable);
// We call join on the thread so we can be sure that no
// simultaneous access to the passed parameters will happen.
KeygenRunnable->Join();
NS_RELEASE(dialogs);
if (NS_SUCCEEDED(rv)) {
PK11SlotInfo *used_slot = nullptr;
rv = KeygenRunnable->ConsumeResult(&used_slot, &privateKey, &publicKey);
if (NS_SUCCEEDED(rv) && used_slot) {
PK11_FreeSlot(used_slot);
}
}
}
}
if (NS_FAILED(rv) || !privateKey) {
goto loser;
}
// just in case we'll need to authenticate to the db -jp //
privateKey->wincx = m_ctx;
/*
* Create a subject public key info from the public key.
*/
spkInfo = SECKEY_CreateSubjectPublicKeyInfo(publicKey);
if ( !spkInfo ) {
goto loser;
}
/*
* Now DER encode the whole subjectPublicKeyInfo.
*/
srv = DER_Encode(arena.get(), &spkiItem, CERTSubjectPublicKeyInfoTemplate,
spkInfo);
if (srv != SECSuccess) {
goto loser;
}
/*
* set up the PublicKeyAndChallenge data structure, then DER encode it
*/
pkac.spki = spkiItem;
pkac.challenge.len = aChallenge.Length();
pkac.challenge.data = (unsigned char *)ToNewCString(aChallenge);
if (!pkac.challenge.data) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto loser;
}
srv = DER_Encode(arena.get(), &pkacItem, CERTPublicKeyAndChallengeTemplate,
&pkac);
if (srv != SECSuccess) {
goto loser;
}
/*
* now sign the DER encoded PublicKeyAndChallenge
*/
srv = SEC_DerSignData(arena.get(), &signedItem, pkacItem.data, pkacItem.len,
privateKey, algTag);
if (srv != SECSuccess) {
goto loser;
}
/*
* Convert the signed public key and challenge into base64/ascii.
*/
keystring = BTOA_DataToAscii(signedItem.data, signedItem.len);
if (!keystring) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto loser;
}
CopyASCIItoUTF16(keystring, aOutPublicKey);
free(keystring);
rv = NS_OK;
GatherKeygenTelemetry(keyGenMechanism, keysize, keyparamsString);
loser:
if (srv != SECSuccess) {
if ( privateKey ) {
PK11_DestroyTokenObject(privateKey->pkcs11Slot,privateKey->pkcs11ID);
}
if ( publicKey ) {
PK11_DestroyTokenObject(publicKey->pkcs11Slot,publicKey->pkcs11ID);
}
}
if ( spkInfo ) {
SECKEY_DestroySubjectPublicKeyInfo(spkInfo);
}
if ( publicKey ) {
SECKEY_DestroyPublicKey(publicKey);
}
if ( privateKey ) {
SECKEY_DestroyPrivateKey(privateKey);
}
if (slot) {
PK11_FreeSlot(slot);
}
if (KeygenRunnable) {
NS_RELEASE(KeygenRunnable);
}
if (keyparamsString) {
free(keyparamsString);
}
if (pkac.challenge.data) {
free(pkac.challenge.data);
}
// If params is non-null and doesn't point to rsaParams, it was allocated
// in decode_ec_params. We have to free this memory.
if (params && params != &rsaParams) {
SECITEM_FreeItem(static_cast<SECItem*>(params), true);
params = nullptr;
}
return rv;
}
static nsresult
GetAttestationCertificate(const UniquePK11SlotInfo& aSlot,
/*out*/ UniqueSECKEYPrivateKey& aAttestPrivKey,
/*out*/ UniqueCERTCertificate& aAttestCert,
const nsNSSShutDownPreventionLock& locker)
{
MOZ_ASSERT(aSlot);
if (NS_WARN_IF(!aSlot)) {
return NS_ERROR_INVALID_ARG;
}
UniqueSECKEYPublicKey pubKey;
// Construct an ephemeral keypair for this Attestation Certificate
nsresult rv = GenEcKeypair(aSlot, aAttestPrivKey, pubKey, locker);
if (NS_WARN_IF(NS_FAILED(rv) || !aAttestPrivKey || !pubKey)) {
MOZ_LOG(gNSSTokenLog, LogLevel::Warning,
("Failed to gen keypair, NSS error #%d", PORT_GetError()));
return NS_ERROR_FAILURE;
}
// Construct the Attestation Certificate itself
UniqueCERTName subjectName(CERT_AsciiToName(kAttestCertSubjectName.get()));
if (NS_WARN_IF(!subjectName)) {
MOZ_LOG(gNSSTokenLog, LogLevel::Warning,
("Failed to set subject name, NSS error #%d", PORT_GetError()));
return NS_ERROR_FAILURE;
}
UniqueCERTSubjectPublicKeyInfo spki(
SECKEY_CreateSubjectPublicKeyInfo(pubKey.get()));
if (NS_WARN_IF(!spki)) {
MOZ_LOG(gNSSTokenLog, LogLevel::Warning,
("Failed to set SPKI, NSS error #%d", PORT_GetError()));
return NS_ERROR_FAILURE;
}
UniqueCERTCertificateRequest certreq(
CERT_CreateCertificateRequest(subjectName.get(), spki.get(), nullptr));
if (NS_WARN_IF(!certreq)) {
MOZ_LOG(gNSSTokenLog, LogLevel::Warning,
("Failed to gen CSR, NSS error #%d", PORT_GetError()));
return NS_ERROR_FAILURE;
}
PRTime now = PR_Now();
PRTime notBefore = now - kExpirationSlack;
PRTime notAfter = now + kExpirationLife;
UniqueCERTValidity validity(CERT_CreateValidity(notBefore, notAfter));
if (NS_WARN_IF(!validity)) {
MOZ_LOG(gNSSTokenLog, LogLevel::Warning,
("Failed to gen validity, NSS error #%d", PORT_GetError()));
return NS_ERROR_FAILURE;
}
unsigned long serial;
unsigned char* serialBytes =
mozilla::BitwiseCast<unsigned char*, unsigned long*>(&serial);
SECStatus srv = PK11_GenerateRandomOnSlot(aSlot.get(), serialBytes,
sizeof(serial));
if (NS_WARN_IF(srv != SECSuccess)) {
MOZ_LOG(gNSSTokenLog, LogLevel::Warning,
("Failed to gen serial, NSS error #%d", PORT_GetError()));
return NS_ERROR_FAILURE;
}
// Ensure that the most significant bit isn't set (which would
// indicate a negative number, which isn't valid for serial
// numbers).
serialBytes[0] &= 0x7f;
// Also ensure that the least significant bit on the most
// significant byte is set (to prevent a leading zero byte,
// which also wouldn't be valid).
serialBytes[0] |= 0x01;
aAttestCert = UniqueCERTCertificate(
CERT_CreateCertificate(serial, subjectName.get(), validity.get(),
certreq.get()));
if (NS_WARN_IF(!aAttestCert)) {
MOZ_LOG(gNSSTokenLog, LogLevel::Warning,
("Failed to gen certificate, NSS error #%d", PORT_GetError()));
return NS_ERROR_FAILURE;
}
PLArenaPool* arena = aAttestCert->arena;
srv = SECOID_SetAlgorithmID(arena, &aAttestCert->signature,
SEC_OID_ANSIX962_ECDSA_SHA256_SIGNATURE,
/* wincx */ nullptr);
if (NS_WARN_IF(srv != SECSuccess)) {
return NS_ERROR_FAILURE;
}
// Set version to X509v3.
*(aAttestCert->version.data) = SEC_CERTIFICATE_VERSION_3;
aAttestCert->version.len = 1;
SECItem innerDER = { siBuffer, nullptr, 0 };
if (NS_WARN_IF(!SEC_ASN1EncodeItem(arena, &innerDER, aAttestCert.get(),
SEC_ASN1_GET(CERT_CertificateTemplate)))) {
return NS_ERROR_FAILURE;
}
SECItem* signedCert = PORT_ArenaZNew(arena, SECItem);
if (NS_WARN_IF(!signedCert)) {
return NS_ERROR_FAILURE;
}
srv = SEC_DerSignData(arena, signedCert, innerDER.data, innerDER.len,
aAttestPrivKey.get(),
SEC_OID_ANSIX962_ECDSA_SHA256_SIGNATURE);
if (NS_WARN_IF(srv != SECSuccess)) {
return NS_ERROR_FAILURE;
}
aAttestCert->derCert = *signedCert;
MOZ_LOG(gNSSTokenLog, LogLevel::Debug,
("U2F Soft Token attestation certificate generated."));
return NS_OK;
}
nsresult Generate()
{
nsresult rv;
// Get the key slot for generation later
UniquePK11SlotInfo slot(PK11_GetInternalKeySlot());
if (!slot) {
return mozilla::psm::GetXPCOMFromNSSError(PR_GetError());
}
// Remove existing certs with this name (if any)
rv = RemoveExisting();
if (NS_FAILED(rv)) {
return rv;
}
// Generate a new cert
NS_NAMED_LITERAL_CSTRING(commonNamePrefix, "CN=");
nsAutoCString subjectNameStr(commonNamePrefix + mNickname);
UniqueCERTName subjectName(CERT_AsciiToName(subjectNameStr.get()));
if (!subjectName) {
return mozilla::psm::GetXPCOMFromNSSError(PR_GetError());
}
// Use the well-known NIST P-256 curve
SECOidData* curveOidData = SECOID_FindOIDByTag(SEC_OID_SECG_EC_SECP256R1);
if (!curveOidData) {
return mozilla::psm::GetXPCOMFromNSSError(PR_GetError());
}
// Get key params from the curve
ScopedAutoSECItem keyParams(2 + curveOidData->oid.len);
keyParams.data[0] = SEC_ASN1_OBJECT_ID;
keyParams.data[1] = curveOidData->oid.len;
memcpy(keyParams.data + 2, curveOidData->oid.data, curveOidData->oid.len);
// Generate cert key pair
SECKEYPublicKey* tempPublicKey;
UniqueSECKEYPrivateKey privateKey(
PK11_GenerateKeyPair(slot.get(), CKM_EC_KEY_PAIR_GEN, &keyParams,
&tempPublicKey, true /* token */,
true /* sensitive */, nullptr));
UniqueSECKEYPublicKey publicKey(tempPublicKey);
tempPublicKey = nullptr;
if (!privateKey || !publicKey) {
return mozilla::psm::GetXPCOMFromNSSError(PR_GetError());
}
// Create subject public key info and cert request
UniqueCERTSubjectPublicKeyInfo spki(
SECKEY_CreateSubjectPublicKeyInfo(publicKey.get()));
if (!spki) {
return mozilla::psm::GetXPCOMFromNSSError(PR_GetError());
}
UniqueCERTCertificateRequest certRequest(
CERT_CreateCertificateRequest(subjectName.get(), spki.get(), nullptr));
if (!certRequest) {
return mozilla::psm::GetXPCOMFromNSSError(PR_GetError());
}
// Valid from one day before to 1 year after
static const PRTime oneDay = PRTime(PR_USEC_PER_SEC)
* PRTime(60) // sec
* PRTime(60) // min
* PRTime(24); // hours
PRTime now = PR_Now();
PRTime notBefore = now - oneDay;
PRTime notAfter = now + (PRTime(365) * oneDay);
UniqueCERTValidity validity(CERT_CreateValidity(notBefore, notAfter));
if (!validity) {
return mozilla::psm::GetXPCOMFromNSSError(PR_GetError());
}
// Generate random serial
unsigned long serial;
// This serial in principle could collide, but it's unlikely
rv = MapSECStatus(PK11_GenerateRandomOnSlot(
slot.get(), BitwiseCast<unsigned char*, unsigned long*>(&serial),
sizeof(serial)));
if (NS_FAILED(rv)) {
return rv;
}
// Create the cert from these pieces
UniqueCERTCertificate cert(
CERT_CreateCertificate(serial, subjectName.get(), validity.get(),
certRequest.get()));
if (!cert) {
return mozilla::psm::GetXPCOMFromNSSError(PR_GetError());
}
// Update the cert version to X509v3
if (!cert->version.data) {
return NS_ERROR_INVALID_POINTER;
}
*(cert->version.data) = SEC_CERTIFICATE_VERSION_3;
cert->version.len = 1;
// Set cert signature algorithm
PLArenaPool* arena = cert->arena;
if (!arena) {
return NS_ERROR_INVALID_POINTER;
}
rv = MapSECStatus(
SECOID_SetAlgorithmID(arena, &cert->signature,
SEC_OID_ANSIX962_ECDSA_SHA256_SIGNATURE, 0));
if (NS_FAILED(rv)) {
return rv;
}
// Encode and self-sign the cert
UniqueSECItem certDER(
SEC_ASN1EncodeItem(nullptr, nullptr, cert.get(),
SEC_ASN1_GET(CERT_CertificateTemplate)));
if (!certDER) {
return mozilla::psm::GetXPCOMFromNSSError(PR_GetError());
}
rv = MapSECStatus(
SEC_DerSignData(arena, &cert->derCert, certDER->data, certDER->len,
privateKey.get(),
SEC_OID_ANSIX962_ECDSA_SHA256_SIGNATURE));
if (NS_FAILED(rv)) {
return rv;
}
// Create a CERTCertificate from the signed data
UniqueCERTCertificate certFromDER(
CERT_NewTempCertificate(CERT_GetDefaultCertDB(), &cert->derCert, nullptr,
true /* perm */, true /* copyDER */));
if (!certFromDER) {
return mozilla::psm::GetXPCOMFromNSSError(PR_GetError());
}
// Save the cert in the DB
rv = MapSECStatus(PK11_ImportCert(slot.get(), certFromDER.get(),
CK_INVALID_HANDLE, mNickname.get(),
false /* unused */));
if (NS_FAILED(rv)) {
return rv;
}
// We should now have cert in the DB, read it back in nsIX509Cert form
return GetFromDB();
}
nsresult
nsKeygenFormProcessor::GetPublicKey(nsAString& aValue, nsAString& aChallenge,
nsAFlatString& aKeyType,
nsAString& aOutPublicKey, nsAString& aKeyParams)
{
nsNSSShutDownPreventionLock locker;
nsresult rv = NS_ERROR_FAILURE;
char *keystring = nsnull;
char *keyparamsString = nsnull, *str = nsnull;
KeyType type;
PRUint32 keyGenMechanism;
PRInt32 primeBits;
PK11SlotInfo *slot = nsnull;
PK11RSAGenParams rsaParams;
SECOidTag algTag;
int keysize = 0;
void *params;
SECKEYPrivateKey *privateKey = nsnull;
SECKEYPublicKey *publicKey = nsnull;
CERTSubjectPublicKeyInfo *spkInfo = nsnull;
PRArenaPool *arena = nsnull;
SECStatus sec_rv = SECFailure;
SECItem spkiItem;
SECItem pkacItem;
SECItem signedItem;
CERTPublicKeyAndChallenge pkac;
pkac.challenge.data = nsnull;
nsIGeneratingKeypairInfoDialogs * dialogs;
nsKeygenThread *KeygenRunnable = 0;
nsCOMPtr<nsIKeygenThread> runnable;
// Get the key size //
for (size_t i = 0; i < number_of_key_size_choices; ++i) {
if (aValue.Equals(mSECKeySizeChoiceList[i].name)) {
keysize = mSECKeySizeChoiceList[i].size;
break;
}
}
if (!keysize) {
goto loser;
}
arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if (!arena) {
goto loser;
}
// Set the keygen mechanism
if (aKeyType.IsEmpty() || aKeyType.LowerCaseEqualsLiteral("rsa")) {
type = rsaKey;
keyGenMechanism = CKM_RSA_PKCS_KEY_PAIR_GEN;
} else if (aKeyType.LowerCaseEqualsLiteral("dsa")) {
char * end;
keyparamsString = ToNewCString(aKeyParams);
if (!keyparamsString) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto loser;
}
type = dsaKey;
keyGenMechanism = CKM_DSA_KEY_PAIR_GEN;
if (strcmp(keyparamsString, "null") == 0)
goto loser;
str = keyparamsString;
PRBool found_match = PR_FALSE;
do {
end = strchr(str, ',');
if (end != nsnull)
*end = '\0';
primeBits = pqg_prime_bits(str);
if (keysize == primeBits) {
found_match = PR_TRUE;
break;
}
str = end + 1;
} while (end != nsnull);
if (!found_match) {
goto loser;
}
} else if (aKeyType.LowerCaseEqualsLiteral("ec")) {
keyparamsString = ToNewCString(aKeyParams);
if (!keyparamsString) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto loser;
}
type = ecKey;
keyGenMechanism = CKM_EC_KEY_PAIR_GEN;
/* ecParams are initialized later */
} else {
goto loser;
}
// Get the slot
rv = GetSlot(keyGenMechanism, &slot);
if (NS_FAILED(rv)) {
goto loser;
}
switch (keyGenMechanism) {
case CKM_RSA_PKCS_KEY_PAIR_GEN:
rsaParams.keySizeInBits = keysize;
rsaParams.pe = DEFAULT_RSA_KEYGEN_PE;
algTag = DEFAULT_RSA_KEYGEN_ALG;
params = &rsaParams;
break;
case CKM_DSA_KEY_PAIR_GEN:
// XXX Fix this! XXX //
goto loser;
case CKM_EC_KEY_PAIR_GEN:
/* XXX We ought to rethink how the KEYGEN tag is
* displayed. The pulldown selections presented
* to the user must depend on the keytype.
* The displayed selection could be picked
* from the keyparams attribute (this is currently called
* the pqg attribute).
* For now, we pick ecparams from the keyparams field
* if it specifies a valid supported curve, or else
* we pick one of secp384r1, secp256r1 or secp192r1
* respectively depending on the user's selection
* (High, Medium, Low).
* (RSA uses RSA-2048, RSA-1024 and RSA-512 for historical
* reasons, while ECC choices represent a stronger mapping)
* NOTE: The user's selection
* is silently ignored when a valid curve is presented
* in keyparams.
*/
if ((params = decode_ec_params(keyparamsString)) == nsnull) {
/* The keyparams attribute did not specify a valid
* curve name so use a curve based on the keysize.
* NOTE: Here keysize is used only as an indication of
* High/Medium/Low strength; elliptic curve
* cryptography uses smaller keys than RSA to provide
* equivalent security.
*/
switch (keysize) {
case 2048:
params = decode_ec_params("secp384r1");
break;
case 1024:
case 512:
params = decode_ec_params("secp256r1");
break;
}
}
/* XXX The signature algorithm ought to choose the hashing
* algorithm based on key size once ECDSA variations based
* on SHA256 SHA384 and SHA512 are standardized.
*/
algTag = SEC_OID_ANSIX962_ECDSA_SIGNATURE_WITH_SHA1_DIGEST;
break;
default:
goto loser;
}
/* Make sure token is initialized. */
rv = setPassword(slot, m_ctx);
if (NS_FAILED(rv))
goto loser;
sec_rv = PK11_Authenticate(slot, PR_TRUE, m_ctx);
if (sec_rv != SECSuccess) {
goto loser;
}
rv = getNSSDialogs((void**)&dialogs,
NS_GET_IID(nsIGeneratingKeypairInfoDialogs),
NS_GENERATINGKEYPAIRINFODIALOGS_CONTRACTID);
if (NS_SUCCEEDED(rv)) {
KeygenRunnable = new nsKeygenThread();
NS_IF_ADDREF(KeygenRunnable);
}
if (NS_FAILED(rv) || !KeygenRunnable) {
rv = NS_OK;
privateKey = PK11_GenerateKeyPair(slot, keyGenMechanism, params,
&publicKey, PR_TRUE, PR_TRUE, m_ctx);
} else {
KeygenRunnable->SetParams( slot, keyGenMechanism, params, PR_TRUE, PR_TRUE, m_ctx );
runnable = do_QueryInterface(KeygenRunnable);
if (runnable) {
{
nsPSMUITracker tracker;
if (tracker.isUIForbidden()) {
rv = NS_ERROR_NOT_AVAILABLE;
}
else {
rv = dialogs->DisplayGeneratingKeypairInfo(m_ctx, runnable);
// We call join on the thread,
// so we can be sure that no simultaneous access to the passed parameters will happen.
KeygenRunnable->Join();
}
}
NS_RELEASE(dialogs);
if (NS_SUCCEEDED(rv)) {
rv = KeygenRunnable->GetParams(&privateKey, &publicKey);
}
}
}
if (NS_FAILED(rv) || !privateKey) {
goto loser;
}
// just in case we'll need to authenticate to the db -jp //
privateKey->wincx = m_ctx;
/*
* Create a subject public key info from the public key.
*/
spkInfo = SECKEY_CreateSubjectPublicKeyInfo(publicKey);
if ( !spkInfo ) {
goto loser;
}
/*
* Now DER encode the whole subjectPublicKeyInfo.
*/
sec_rv=DER_Encode(arena, &spkiItem, CERTSubjectPublicKeyInfoTemplate, spkInfo);
if (sec_rv != SECSuccess) {
goto loser;
}
/*
* set up the PublicKeyAndChallenge data structure, then DER encode it
*/
pkac.spki = spkiItem;
pkac.challenge.len = aChallenge.Length();
pkac.challenge.data = (unsigned char *)ToNewCString(aChallenge);
if (!pkac.challenge.data) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto loser;
}
sec_rv = DER_Encode(arena, &pkacItem, CERTPublicKeyAndChallengeTemplate, &pkac);
if ( sec_rv != SECSuccess ) {
goto loser;
}
/*
* now sign the DER encoded PublicKeyAndChallenge
*/
sec_rv = SEC_DerSignData(arena, &signedItem, pkacItem.data, pkacItem.len,
privateKey, algTag);
if ( sec_rv != SECSuccess ) {
goto loser;
}
/*
* Convert the signed public key and challenge into base64/ascii.
*/
keystring = BTOA_DataToAscii(signedItem.data, signedItem.len);
if (!keystring) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto loser;
}
CopyASCIItoUTF16(keystring, aOutPublicKey);
nsCRT::free(keystring);
rv = NS_OK;
loser:
if ( sec_rv != SECSuccess ) {
if ( privateKey ) {
PK11_DestroyTokenObject(privateKey->pkcs11Slot,privateKey->pkcs11ID);
}
if ( publicKey ) {
PK11_DestroyTokenObject(publicKey->pkcs11Slot,publicKey->pkcs11ID);
}
}
if ( spkInfo ) {
SECKEY_DestroySubjectPublicKeyInfo(spkInfo);
}
if ( publicKey ) {
SECKEY_DestroyPublicKey(publicKey);
}
if ( privateKey ) {
SECKEY_DestroyPrivateKey(privateKey);
}
if ( arena ) {
PORT_FreeArena(arena, PR_TRUE);
}
if (slot != nsnull) {
PK11_FreeSlot(slot);
}
if (KeygenRunnable) {
NS_RELEASE(KeygenRunnable);
}
if (keyparamsString) {
nsMemory::Free(keyparamsString);
}
if (pkac.challenge.data) {
nsMemory::Free(pkac.challenge.data);
}
return rv;
}
RefPtr<DtlsIdentity> DtlsIdentity::Generate() {
UniquePK11SlotInfo slot(PK11_GetInternalSlot());
if (!slot) {
return nullptr;
}
uint8_t random_name[16];
SECStatus rv = PK11_GenerateRandomOnSlot(slot.get(), random_name,
sizeof(random_name));
if (rv != SECSuccess)
return nullptr;
std::string name;
char chunk[3];
for (size_t i = 0; i < sizeof(random_name); ++i) {
SprintfLiteral(chunk, "%.2x", random_name[i]);
name += chunk;
}
std::string subject_name_string = "CN=" + name;
UniqueCERTName subject_name(CERT_AsciiToName(subject_name_string.c_str()));
if (!subject_name) {
return nullptr;
}
unsigned char paramBuf[12]; // OIDs are small
SECItem ecdsaParams = { siBuffer, paramBuf, sizeof(paramBuf) };
SECOidData* oidData = SECOID_FindOIDByTag(SEC_OID_SECG_EC_SECP256R1);
if (!oidData || (oidData->oid.len > (sizeof(paramBuf) - 2))) {
return nullptr;
}
ecdsaParams.data[0] = SEC_ASN1_OBJECT_ID;
ecdsaParams.data[1] = oidData->oid.len;
memcpy(ecdsaParams.data + 2, oidData->oid.data, oidData->oid.len);
ecdsaParams.len = oidData->oid.len + 2;
SECKEYPublicKey *pubkey;
UniqueSECKEYPrivateKey private_key(
PK11_GenerateKeyPair(slot.get(),
CKM_EC_KEY_PAIR_GEN, &ecdsaParams, &pubkey,
PR_FALSE, PR_TRUE, nullptr));
if (private_key == nullptr)
return nullptr;
UniqueSECKEYPublicKey public_key(pubkey);
pubkey = nullptr;
UniqueCERTSubjectPublicKeyInfo spki(
SECKEY_CreateSubjectPublicKeyInfo(public_key.get()));
if (!spki) {
return nullptr;
}
UniqueCERTCertificateRequest certreq(
CERT_CreateCertificateRequest(subject_name.get(), spki.get(), nullptr));
if (!certreq) {
return nullptr;
}
// From 1 day before todayto 30 days after.
// This is a sort of arbitrary range designed to be valid
// now with some slack in case the other side expects
// some before expiry.
//
// Note: explicit casts necessary to avoid
// warning C4307: '*' : integral constant overflow
static const PRTime oneDay = PRTime(PR_USEC_PER_SEC)
* PRTime(60) // sec
* PRTime(60) // min
* PRTime(24); // hours
PRTime now = PR_Now();
PRTime notBefore = now - oneDay;
PRTime notAfter = now + (PRTime(30) * oneDay);
UniqueCERTValidity validity(CERT_CreateValidity(notBefore, notAfter));
if (!validity) {
return nullptr;
}
unsigned long serial;
// Note: This serial in principle could collide, but it's unlikely
rv = PK11_GenerateRandomOnSlot(slot.get(),
reinterpret_cast<unsigned char *>(&serial),
sizeof(serial));
if (rv != SECSuccess) {
return nullptr;
}
UniqueCERTCertificate certificate(
CERT_CreateCertificate(serial, subject_name.get(), validity.get(),
certreq.get()));
if (!certificate) {
return nullptr;
}
PLArenaPool *arena = certificate->arena;
rv = SECOID_SetAlgorithmID(arena, &certificate->signature,
SEC_OID_ANSIX962_ECDSA_SHA256_SIGNATURE, 0);
if (rv != SECSuccess)
return nullptr;
// Set version to X509v3.
*(certificate->version.data) = SEC_CERTIFICATE_VERSION_3;
certificate->version.len = 1;
SECItem innerDER;
innerDER.len = 0;
innerDER.data = nullptr;
if (!SEC_ASN1EncodeItem(arena, &innerDER, certificate.get(),
SEC_ASN1_GET(CERT_CertificateTemplate))) {
return nullptr;
}
SECItem *signedCert = PORT_ArenaZNew(arena, SECItem);
if (!signedCert) {
return nullptr;
}
rv = SEC_DerSignData(arena, signedCert, innerDER.data, innerDER.len,
private_key.get(),
SEC_OID_ANSIX962_ECDSA_SHA256_SIGNATURE);
if (rv != SECSuccess) {
return nullptr;
}
certificate->derCert = *signedCert;
RefPtr<DtlsIdentity> identity = new DtlsIdentity(Move(private_key),
Move(certificate),
ssl_kea_ecdh);
return identity.forget();
}
