// NSS exports private EC keys without the CKA_EC_POINT attribute, i.e. the
// public value. To properly export the private key to JWK or PKCS #8 we need
// the public key data though and so we use this method to augment a private
// key with data from the given public key.
nsresult
CryptoKey::AddPublicKeyData(SECKEYPublicKey* aPublicKey)
{
// This should be a private key.
MOZ_ASSERT(GetKeyType() == PRIVATE);
// There should be a private NSS key with type 'EC'.
MOZ_ASSERT(mPrivateKey && mPrivateKey->keyType == ecKey);
// The given public key should have the same key type.
MOZ_ASSERT(aPublicKey->keyType == mPrivateKey->keyType);
nsNSSShutDownPreventionLock locker;
// Read EC params.
ScopedAutoSECItem params;
SECStatus rv = PK11_ReadRawAttribute(PK11_TypePrivKey, mPrivateKey.get(),
CKA_EC_PARAMS, ¶ms);
if (rv != SECSuccess) {
return NS_ERROR_DOM_OPERATION_ERR;
}
// Read private value.
ScopedAutoSECItem value;
rv = PK11_ReadRawAttribute(PK11_TypePrivKey, mPrivateKey.get(), CKA_VALUE,
&value);
if (rv != SECSuccess) {
return NS_ERROR_DOM_OPERATION_ERR;
}
SECItem* point = &aPublicKey->u.ec.publicValue;
CK_OBJECT_CLASS privateKeyValue = CKO_PRIVATE_KEY;
CK_BBOOL falseValue = CK_FALSE;
CK_KEY_TYPE ecValue = CKK_EC;
CK_ATTRIBUTE keyTemplate[9] = {
{ CKA_CLASS, &privateKeyValue, sizeof(privateKeyValue) },
{ CKA_KEY_TYPE, &ecValue, sizeof(ecValue) },
{ CKA_TOKEN, &falseValue, sizeof(falseValue) },
{ CKA_SENSITIVE, &falseValue, sizeof(falseValue) },
{ CKA_PRIVATE, &falseValue, sizeof(falseValue) },
// PrivateKeyFromPrivateKeyTemplate sets the ID.
{ CKA_ID, nullptr, 0 },
{ CKA_EC_PARAMS, params.data, params.len },
{ CKA_EC_POINT, point->data, point->len },
{ CKA_VALUE, value.data, value.len },
};
mPrivateKey = PrivateKeyFromPrivateKeyTemplate(keyTemplate,
ArrayLength(keyTemplate));
NS_ENSURE_TRUE(mPrivateKey, NS_ERROR_DOM_OPERATION_ERR);
return NS_OK;
}
SECKEYPrivateKey*
CryptoKey::PrivateKeyFromJwk(const JsonWebKey& aJwk,
const nsNSSShutDownPreventionLock& /*proofOfLock*/)
{
CK_OBJECT_CLASS privateKeyValue = CKO_PRIVATE_KEY;
CK_BBOOL falseValue = CK_FALSE;
if (aJwk.mKty.EqualsLiteral(JWK_TYPE_EC)) {
// Verify that all of the required parameters are present
CryptoBuffer x, y, d;
if (!aJwk.mCrv.WasPassed() ||
!aJwk.mX.WasPassed() || NS_FAILED(x.FromJwkBase64(aJwk.mX.Value())) ||
!aJwk.mY.WasPassed() || NS_FAILED(y.FromJwkBase64(aJwk.mY.Value())) ||
!aJwk.mD.WasPassed() || NS_FAILED(d.FromJwkBase64(aJwk.mD.Value()))) {
return nullptr;
}
nsString namedCurve;
if (!NormalizeToken(aJwk.mCrv.Value(), namedCurve)) {
return nullptr;
}
ScopedPLArenaPool arena(PORT_NewArena(DER_DEFAULT_CHUNKSIZE));
if (!arena) {
return nullptr;
}
// Create parameters.
SECItem* params = CreateECParamsForCurve(namedCurve, arena.get());
if (!params) {
return nullptr;
}
SECItem* ecPoint = CreateECPointForCoordinates(x, y, arena.get());
if (!ecPoint) {
return nullptr;
}
// Compute the ID for this key
// This is generated with a SHA-1 hash, so unlikely to collide
ScopedSECItem objID(PK11_MakeIDFromPubKey(ecPoint));
if (!objID.get()) {
return nullptr;
}
// Populate template from parameters
CK_KEY_TYPE ecValue = CKK_EC;
CK_ATTRIBUTE keyTemplate[9] = {
{ CKA_CLASS, &privateKeyValue, sizeof(privateKeyValue) },
{ CKA_KEY_TYPE, &ecValue, sizeof(ecValue) },
{ CKA_TOKEN, &falseValue, sizeof(falseValue) },
{ CKA_SENSITIVE, &falseValue, sizeof(falseValue) },
{ CKA_PRIVATE, &falseValue, sizeof(falseValue) },
{ CKA_ID, objID->data, objID->len },
{ CKA_EC_PARAMS, params->data, params->len },
{ CKA_EC_POINT, ecPoint->data, ecPoint->len },
{ CKA_VALUE, (void*) d.Elements(), d.Length() },
};
return PrivateKeyFromPrivateKeyTemplate(objID, keyTemplate,
PR_ARRAY_SIZE(keyTemplate));
}
if (aJwk.mKty.EqualsLiteral(JWK_TYPE_RSA)) {
// Verify that all of the required parameters are present
CryptoBuffer n, e, d, p, q, dp, dq, qi;
if (!aJwk.mN.WasPassed() || NS_FAILED(n.FromJwkBase64(aJwk.mN.Value())) ||
!aJwk.mE.WasPassed() || NS_FAILED(e.FromJwkBase64(aJwk.mE.Value())) ||
!aJwk.mD.WasPassed() || NS_FAILED(d.FromJwkBase64(aJwk.mD.Value())) ||
!aJwk.mP.WasPassed() || NS_FAILED(p.FromJwkBase64(aJwk.mP.Value())) ||
!aJwk.mQ.WasPassed() || NS_FAILED(q.FromJwkBase64(aJwk.mQ.Value())) ||
!aJwk.mDp.WasPassed() || NS_FAILED(dp.FromJwkBase64(aJwk.mDp.Value())) ||
!aJwk.mDq.WasPassed() || NS_FAILED(dq.FromJwkBase64(aJwk.mDq.Value())) ||
!aJwk.mQi.WasPassed() || NS_FAILED(qi.FromJwkBase64(aJwk.mQi.Value()))) {
return nullptr;
}
ScopedPLArenaPool arena(PORT_NewArena(DER_DEFAULT_CHUNKSIZE));
if (!arena) {
return nullptr;
}
// Compute the ID for this key
// This is generated with a SHA-1 hash, so unlikely to collide
SECItem nItem = { siBuffer, nullptr, 0 };
if (!n.ToSECItem(arena, &nItem)) {
return nullptr;
}
ScopedSECItem objID(PK11_MakeIDFromPubKey(&nItem));
if (!objID.get()) {
return nullptr;
}
// Populate template from parameters
CK_KEY_TYPE rsaValue = CKK_RSA;
CK_ATTRIBUTE keyTemplate[14] = {
{ CKA_CLASS, &privateKeyValue, sizeof(privateKeyValue) },
{ CKA_KEY_TYPE, &rsaValue, sizeof(rsaValue) },
{ CKA_TOKEN, &falseValue, sizeof(falseValue) },
{ CKA_SENSITIVE, &falseValue, sizeof(falseValue) },
{ CKA_PRIVATE, &falseValue, sizeof(falseValue) },
{ CKA_ID, objID->data, objID->len },
{ CKA_MODULUS, (void*) n.Elements(), n.Length() },
{ CKA_PUBLIC_EXPONENT, (void*) e.Elements(), e.Length() },
{ CKA_PRIVATE_EXPONENT, (void*) d.Elements(), d.Length() },
{ CKA_PRIME_1, (void*) p.Elements(), p.Length() },
{ CKA_PRIME_2, (void*) q.Elements(), q.Length() },
{ CKA_EXPONENT_1, (void*) dp.Elements(), dp.Length() },
{ CKA_EXPONENT_2, (void*) dq.Elements(), dq.Length() },
{ CKA_COEFFICIENT, (void*) qi.Elements(), qi.Length() },
};
return PrivateKeyFromPrivateKeyTemplate(objID, keyTemplate,
PR_ARRAY_SIZE(keyTemplate));
}
return nullptr;
}
// NSS exports private EC keys without the CKA_EC_POINT attribute, i.e. the
// public value. To properly export the private key to JWK or PKCS #8 we need
// the public key data though and so we use this method to augment a private
// key with data from the given public key.
nsresult
CryptoKey::AddPublicKeyData(SECKEYPublicKey* aPublicKey)
{
// This should be a private key.
MOZ_ASSERT(GetKeyType() == PRIVATE);
// There should be a private NSS key with type 'EC'.
MOZ_ASSERT(mPrivateKey && mPrivateKey->keyType == ecKey);
// The given public key should have the same key type.
MOZ_ASSERT(aPublicKey->keyType == mPrivateKey->keyType);
nsNSSShutDownPreventionLock locker;
ScopedPK11SlotInfo slot(PK11_GetInternalSlot());
if (!slot) {
return NS_ERROR_DOM_OPERATION_ERR;
}
// Generate a random 160-bit object ID.
ScopedSECItem objID(::SECITEM_AllocItem(nullptr, nullptr, 20));
SECStatus rv = PK11_GenerateRandomOnSlot(slot, objID->data, objID->len);
if (rv != SECSuccess) {
return NS_ERROR_DOM_OPERATION_ERR;
}
// Read EC params.
ScopedSECItem params(::SECITEM_AllocItem(nullptr, nullptr, 0));
rv = PK11_ReadRawAttribute(PK11_TypePrivKey, mPrivateKey, CKA_EC_PARAMS,
params);
if (rv != SECSuccess) {
return NS_ERROR_DOM_OPERATION_ERR;
}
// Read private value.
ScopedSECItem value(::SECITEM_AllocItem(nullptr, nullptr, 0));
rv = PK11_ReadRawAttribute(PK11_TypePrivKey, mPrivateKey, CKA_VALUE, value);
if (rv != SECSuccess) {
return NS_ERROR_DOM_OPERATION_ERR;
}
SECItem* point = &aPublicKey->u.ec.publicValue;
CK_OBJECT_CLASS privateKeyValue = CKO_PRIVATE_KEY;
CK_BBOOL falseValue = CK_FALSE;
CK_KEY_TYPE ecValue = CKK_EC;
CK_ATTRIBUTE keyTemplate[9] = {
{ CKA_CLASS, &privateKeyValue, sizeof(privateKeyValue) },
{ CKA_KEY_TYPE, &ecValue, sizeof(ecValue) },
{ CKA_TOKEN, &falseValue, sizeof(falseValue) },
{ CKA_SENSITIVE, &falseValue, sizeof(falseValue) },
{ CKA_PRIVATE, &falseValue, sizeof(falseValue) },
{ CKA_ID, objID->data, objID->len },
{ CKA_EC_PARAMS, params->data, params->len },
{ CKA_EC_POINT, point->data, point->len },
{ CKA_VALUE, value->data, value->len },
};
mPrivateKey = PrivateKeyFromPrivateKeyTemplate(objID, keyTemplate,
PR_ARRAY_SIZE(keyTemplate));
NS_ENSURE_TRUE(mPrivateKey, NS_ERROR_DOM_OPERATION_ERR);
return NS_OK;
}
