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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et tw=80 : */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "CTVerifyResult.h"
#include "PSMIPCCommon.h"
namespace mozilla {
namespace psm {
SECItem* WrapPrivateKeyInfoWithEmptyPassword(
SECKEYPrivateKey* pk) /* encrypt this private key */
{
if (!pk) {
PR_SetError(SEC_ERROR_INVALID_ARGS, 0);
return nullptr;
}
UniquePK11SlotInfo slot(PK11_GetInternalSlot());
if (!slot) {
return nullptr;
}
// For private keys, NSS cannot export anything other than RSA, but we need EC
// also. So, we use the private key encryption function to serialize instead,
// using a hard-coded dummy password; this is not intended to provide any
// additional security, it just works around a limitation in NSS.
SECItem dummyPassword = {siBuffer, nullptr, 0};
UniqueSECKEYEncryptedPrivateKeyInfo epki(PK11_ExportEncryptedPrivKeyInfo(
slot.get(), SEC_OID_AES_128_CBC, &dummyPassword, pk, 1, nullptr));
if (!epki) {
return nullptr;
}
return SEC_ASN1EncodeItem(
nullptr, nullptr, epki.get(),
NSS_Get_SECKEY_EncryptedPrivateKeyInfoTemplate(nullptr, false));
}
SECStatus UnwrapPrivateKeyInfoWithEmptyPassword(
SECItem* derPKI, const UniqueCERTCertificate& aCert,
SECKEYPrivateKey** privk) {
if (!derPKI || !aCert || !privk) {
PR_SetError(SEC_ERROR_INVALID_ARGS, 0);
return SECFailure;
}
UniqueSECKEYPublicKey publicKey(CERT_ExtractPublicKey(aCert.get()));
// This is a pointer to data inside publicKey
SECItem* publicValue = nullptr;
switch (publicKey->keyType) {
case dsaKey:
publicValue = &publicKey->u.dsa.publicValue;
break;
case dhKey:
publicValue = &publicKey->u.dh.publicValue;
break;
case rsaKey:
publicValue = &publicKey->u.rsa.modulus;
break;
case ecKey:
publicValue = &publicKey->u.ec.publicValue;
break;
default:
MOZ_ASSERT(false);
PR_SetError(SSL_ERROR_BAD_CERTIFICATE, 0);
return SECFailure;
}
UniquePK11SlotInfo slot(PK11_GetInternalSlot());
if (!slot) {
return SECFailure;
}
UniquePLArenaPool temparena(PORT_NewArena(DER_DEFAULT_CHUNKSIZE));
if (!temparena) {
return SECFailure;
}
SECKEYEncryptedPrivateKeyInfo* epki =
PORT_ArenaZNew(temparena.get(), SECKEYEncryptedPrivateKeyInfo);
if (!epki) {
return SECFailure;
}
SECStatus rv = SEC_ASN1DecodeItem(
temparena.get(), epki,
NSS_Get_SECKEY_EncryptedPrivateKeyInfoTemplate(nullptr, false), derPKI);
if (rv != SECSuccess) {
// If SEC_ASN1DecodeItem fails, we cannot assume anything about the
// validity of the data in epki. The best we can do is free the arena
// and return.
return rv;
}
// See comment in WrapPrivateKeyInfoWithEmptyPassword about this
// dummy password stuff.
SECItem dummyPassword = {siBuffer, nullptr, 0};
return PK11_ImportEncryptedPrivateKeyInfoAndReturnKey(
slot.get(), epki, &dummyPassword, nullptr, publicValue, false, false,
publicKey->keyType, KU_ALL, privk, nullptr);
}
void SerializeClientCertAndKey(const UniqueCERTCertificate& aCert,
const UniqueSECKEYPrivateKey& aKey,
ByteArray& aOutSerializedCert,
ByteArray& aOutSerializedKey) {
if (!aCert || !aKey) {
return;
}
UniqueSECItem derPki(WrapPrivateKeyInfoWithEmptyPassword(aKey.get()));
if (!derPki) {
return;
}
aOutSerializedCert.data().AppendElements(aCert->derCert.data,
aCert->derCert.len);
aOutSerializedKey.data().AppendElements(derPki->data, derPki->len);
}
void DeserializeClientCertAndKey(const ByteArray& aSerializedCert,
const ByteArray& aSerializedKey,
UniqueCERTCertificate& aOutCert,
UniqueSECKEYPrivateKey& aOutKey) {
if (aSerializedCert.data().IsEmpty() || aSerializedKey.data().IsEmpty()) {
return;
}
SECItem item = {siBuffer,
const_cast<uint8_t*>(aSerializedCert.data().Elements()),
static_cast<unsigned int>(aSerializedCert.data().Length())};
UniqueCERTCertificate cert(CERT_NewTempCertificate(
CERT_GetDefaultCertDB(), &item, nullptr, false, true));
if (!cert) {
return;
}
SECItem derPKI = {siBuffer,
const_cast<uint8_t*>(aSerializedKey.data().Elements()),
static_cast<unsigned int>(aSerializedKey.data().Length())};
SECKEYPrivateKey* privateKey;
if (UnwrapPrivateKeyInfoWithEmptyPassword(&derPKI, cert, &privateKey) !=
SECSuccess) {
MOZ_ASSERT(false);
return;
}
aOutCert = std::move(cert);
aOutKey.reset(privateKey);
}
} // namespace psm
} // namespace mozilla
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