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gecko-dev/dom/webauthn/WinWebAuthnManager.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 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 "mozilla/dom/PWebAuthnTransactionParent.h"
#include "mozilla/MozPromise.h"
#include "mozilla/ipc/BackgroundParent.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/Unused.h"
#include "nsTextFormatter.h"
#include "nsWindowsHelpers.h"
#include "winwebauthn/webauthn.h"
#include "WinWebAuthnManager.h"
namespace mozilla {
namespace dom {
namespace {
static mozilla::LazyLogModule gWinWebAuthnManagerLog("winwebauthnkeymanager");
StaticAutoPtr<WinWebAuthnManager> gWinWebAuthnManager;
static HMODULE gWinWebAuthnModule = 0;
static decltype(WebAuthNIsUserVerifyingPlatformAuthenticatorAvailable)*
gWinWebauthnIsUVPAA = nullptr;
static decltype(
WebAuthNAuthenticatorMakeCredential)* gWinWebauthnMakeCredential = nullptr;
static decltype(
WebAuthNFreeCredentialAttestation)* gWinWebauthnFreeCredentialAttestation =
nullptr;
static decltype(WebAuthNAuthenticatorGetAssertion)* gWinWebauthnGetAssertion =
nullptr;
static decltype(WebAuthNFreeAssertion)* gWinWebauthnFreeAssertion = nullptr;
static decltype(WebAuthNGetCancellationId)* gWinWebauthnGetCancellationId =
nullptr;
static decltype(
WebAuthNCancelCurrentOperation)* gWinWebauthnCancelCurrentOperation =
nullptr;
static decltype(WebAuthNGetErrorName)* gWinWebauthnGetErrorName = nullptr;
static decltype(WebAuthNGetApiVersionNumber)* gWinWebauthnGetApiVersionNumber =
nullptr;
} // namespace
/***********************************************************************
* WinWebAuthnManager Implementation
**********************************************************************/
constexpr uint32_t kMinWinWebAuthNApiVersion = WEBAUTHN_API_VERSION_1;
WinWebAuthnManager::WinWebAuthnManager() {
// Create on the main thread to make sure ClearOnShutdown() works.
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!gWinWebAuthnModule);
gWinWebAuthnModule = LoadLibrarySystem32(L"webauthn.dll");
if (gWinWebAuthnModule) {
gWinWebauthnIsUVPAA = reinterpret_cast<decltype(
WebAuthNIsUserVerifyingPlatformAuthenticatorAvailable)*>(
GetProcAddress(
gWinWebAuthnModule,
"WebAuthNIsUserVerifyingPlatformAuthenticatorAvailable"));
gWinWebauthnMakeCredential =
reinterpret_cast<decltype(WebAuthNAuthenticatorMakeCredential)*>(
GetProcAddress(gWinWebAuthnModule,
"WebAuthNAuthenticatorMakeCredential"));
gWinWebauthnFreeCredentialAttestation =
reinterpret_cast<decltype(WebAuthNFreeCredentialAttestation)*>(
GetProcAddress(gWinWebAuthnModule,
"WebAuthNFreeCredentialAttestation"));
gWinWebauthnGetAssertion =
reinterpret_cast<decltype(WebAuthNAuthenticatorGetAssertion)*>(
GetProcAddress(gWinWebAuthnModule,
"WebAuthNAuthenticatorGetAssertion"));
gWinWebauthnFreeAssertion =
reinterpret_cast<decltype(WebAuthNFreeAssertion)*>(
GetProcAddress(gWinWebAuthnModule, "WebAuthNFreeAssertion"));
gWinWebauthnGetCancellationId =
reinterpret_cast<decltype(WebAuthNGetCancellationId)*>(
GetProcAddress(gWinWebAuthnModule, "WebAuthNGetCancellationId"));
gWinWebauthnCancelCurrentOperation =
reinterpret_cast<decltype(WebAuthNCancelCurrentOperation)*>(
GetProcAddress(gWinWebAuthnModule,
"WebAuthNCancelCurrentOperation"));
gWinWebauthnGetErrorName =
reinterpret_cast<decltype(WebAuthNGetErrorName)*>(
GetProcAddress(gWinWebAuthnModule, "WebAuthNGetErrorName"));
gWinWebauthnGetApiVersionNumber =
reinterpret_cast<decltype(WebAuthNGetApiVersionNumber)*>(
GetProcAddress(gWinWebAuthnModule, "WebAuthNGetApiVersionNumber"));
if (gWinWebauthnIsUVPAA && gWinWebauthnMakeCredential &&
gWinWebauthnFreeCredentialAttestation && gWinWebauthnGetAssertion &&
gWinWebauthnFreeAssertion && gWinWebauthnGetCancellationId &&
gWinWebauthnCancelCurrentOperation && gWinWebauthnGetErrorName &&
gWinWebauthnGetApiVersionNumber) {
mWinWebAuthNApiVersion = gWinWebauthnGetApiVersionNumber();
}
}
}
WinWebAuthnManager::~WinWebAuthnManager() {
if (gWinWebAuthnModule) {
FreeLibrary(gWinWebAuthnModule);
}
gWinWebAuthnModule = 0;
}
// static
void WinWebAuthnManager::Initialize() {
if (!gWinWebAuthnManager) {
gWinWebAuthnManager = new WinWebAuthnManager();
ClearOnShutdown(&gWinWebAuthnManager);
}
}
// static
WinWebAuthnManager* WinWebAuthnManager::Get() {
MOZ_ASSERT(gWinWebAuthnManager);
return gWinWebAuthnManager;
}
uint32_t WinWebAuthnManager::GetWebAuthNApiVersion() {
return mWinWebAuthNApiVersion;
}
// static
bool WinWebAuthnManager::AreWebAuthNApisAvailable() {
WinWebAuthnManager* mgr = WinWebAuthnManager::Get();
return mgr->GetWebAuthNApiVersion() >= kMinWinWebAuthNApiVersion;
}
bool WinWebAuthnManager::
IsUserVerifyingPlatformAuthenticatorAvailableInternal() {
BOOL isUVPAA = FALSE;
return (gWinWebauthnIsUVPAA(&isUVPAA) == S_OK && isUVPAA == TRUE);
}
// static
bool WinWebAuthnManager::IsUserVerifyingPlatformAuthenticatorAvailable() {
if (WinWebAuthnManager::AreWebAuthNApisAvailable()) {
return WinWebAuthnManager::Get()
->IsUserVerifyingPlatformAuthenticatorAvailableInternal();
}
return false;
}
void WinWebAuthnManager::AbortTransaction(const uint64_t& aTransactionId,
const nsresult& aError) {
Unused << mTransactionParent->SendAbort(aTransactionId, aError);
ClearTransaction();
}
void WinWebAuthnManager::MaybeClearTransaction(
PWebAuthnTransactionParent* aParent) {
// Only clear if we've been requested to do so by our current transaction
// parent.
if (mTransactionParent == aParent) {
ClearTransaction();
}
}
void WinWebAuthnManager::ClearTransaction() { mTransactionParent = nullptr; }
void WinWebAuthnManager::Register(
PWebAuthnTransactionParent* aTransactionParent,
const uint64_t& aTransactionId, const WebAuthnMakeCredentialInfo& aInfo) {
MOZ_LOG(gWinWebAuthnManagerLog, LogLevel::Debug, ("WinWebAuthNRegister"));
ClearTransaction();
mTransactionParent = aTransactionParent;
BYTE U2FUserId = 0x01;
WEBAUTHN_EXTENSION rgExtension[1] = {};
DWORD cExtensions = 0;
BOOL HmacCreateSecret = FALSE;
// RP Information
WEBAUTHN_RP_ENTITY_INFORMATION rpInfo = {
WEBAUTHN_RP_ENTITY_INFORMATION_CURRENT_VERSION, aInfo.RpId().get(),
nullptr, nullptr};
// User Information
WEBAUTHN_USER_ENTITY_INFORMATION userInfo = {
WEBAUTHN_USER_ENTITY_INFORMATION_CURRENT_VERSION,
0,
nullptr,
nullptr,
nullptr,
nullptr};
// Client Data
WEBAUTHN_CLIENT_DATA WebAuthNClientData = {
WEBAUTHN_CLIENT_DATA_CURRENT_VERSION, aInfo.ClientDataJSON().Length(),
(BYTE*)(aInfo.ClientDataJSON().get()), WEBAUTHN_HASH_ALGORITHM_SHA_256};
// Algorithms
nsTArray<WEBAUTHN_COSE_CREDENTIAL_PARAMETER> coseParams;
// User Verification Requirement
DWORD winUserVerificationReq = WEBAUTHN_USER_VERIFICATION_REQUIREMENT_ANY;
// Attachment
DWORD winAttachment = WEBAUTHN_AUTHENTICATOR_ATTACHMENT_ANY;
// Resident Key
BOOL winRequireResidentKey = FALSE;
// AttestationConveyance
DWORD winAttestation = WEBAUTHN_ATTESTATION_CONVEYANCE_PREFERENCE_ANY;
if (aInfo.Extra().isSome()) {
const auto& extra = aInfo.Extra().ref();
rpInfo.pwszName = extra.Rp().Name().get();
rpInfo.pwszIcon = extra.Rp().Icon().get();
userInfo.cbId = static_cast<DWORD>(extra.User().Id().Length());
userInfo.pbId = const_cast<unsigned char*>(extra.User().Id().Elements());
userInfo.pwszName = extra.User().Name().get();
userInfo.pwszIcon = extra.User().Icon().get();
userInfo.pwszDisplayName = extra.User().DisplayName().get();
for (const auto& coseAlg : extra.coseAlgs()) {
WEBAUTHN_COSE_CREDENTIAL_PARAMETER coseAlgorithm = {
WEBAUTHN_COSE_CREDENTIAL_PARAMETER_CURRENT_VERSION,
WEBAUTHN_CREDENTIAL_TYPE_PUBLIC_KEY, coseAlg.alg()};
coseParams.AppendElement(coseAlgorithm);
}
const auto& sel = extra.AuthenticatorSelection();
UserVerificationRequirement userVerificationReq =
sel.userVerificationRequirement();
switch (userVerificationReq) {
case UserVerificationRequirement::Required:
winUserVerificationReq =
WEBAUTHN_USER_VERIFICATION_REQUIREMENT_REQUIRED;
break;
case UserVerificationRequirement::Preferred:
winUserVerificationReq =
WEBAUTHN_USER_VERIFICATION_REQUIREMENT_PREFERRED;
break;
case UserVerificationRequirement::Discouraged:
winUserVerificationReq =
WEBAUTHN_USER_VERIFICATION_REQUIREMENT_DISCOURAGED;
break;
default:
winUserVerificationReq = WEBAUTHN_USER_VERIFICATION_REQUIREMENT_ANY;
break;
}
if (sel.authenticatorAttachment().isSome()) {
const AuthenticatorAttachment authenticatorAttachment =
sel.authenticatorAttachment().value();
switch (authenticatorAttachment) {
case AuthenticatorAttachment::Platform:
winAttachment = WEBAUTHN_AUTHENTICATOR_ATTACHMENT_PLATFORM;
break;
case AuthenticatorAttachment::Cross_platform:
winAttachment = WEBAUTHN_AUTHENTICATOR_ATTACHMENT_CROSS_PLATFORM;
break;
default:
break;
}
}
winRequireResidentKey = sel.requireResidentKey();
// AttestationConveyance
AttestationConveyancePreference attestation =
extra.attestationConveyancePreference();
DWORD winAttestation = WEBAUTHN_ATTESTATION_CONVEYANCE_PREFERENCE_ANY;
switch (attestation) {
case AttestationConveyancePreference::Direct:
winAttestation = WEBAUTHN_ATTESTATION_CONVEYANCE_PREFERENCE_DIRECT;
break;
case AttestationConveyancePreference::Indirect:
winAttestation = WEBAUTHN_ATTESTATION_CONVEYANCE_PREFERENCE_INDIRECT;
break;
case AttestationConveyancePreference::None:
winAttestation = WEBAUTHN_ATTESTATION_CONVEYANCE_PREFERENCE_NONE;
break;
default:
winAttestation = WEBAUTHN_ATTESTATION_CONVEYANCE_PREFERENCE_ANY;
break;
}
for (const WebAuthnExtension& ext : extra.Extensions()) {
MOZ_ASSERT(cExtensions <
(int)(sizeof(rgExtension) / sizeof(rgExtension[0])));
if (ext.type() == WebAuthnExtension::TWebAuthnExtensionHmacSecret) {
HmacCreateSecret =
ext.get_WebAuthnExtensionHmacSecret().hmacCreateSecret() == true;
if (HmacCreateSecret) {
rgExtension[cExtensions].pwszExtensionIdentifier =
WEBAUTHN_EXTENSIONS_IDENTIFIER_HMAC_SECRET;
rgExtension[cExtensions].cbExtension = sizeof(BOOL);
rgExtension[cExtensions].pvExtension = &HmacCreateSecret;
cExtensions++;
}
}
}
} else {
userInfo.cbId = sizeof(BYTE);
userInfo.pbId = &U2FUserId;
WEBAUTHN_COSE_CREDENTIAL_PARAMETER coseAlgorithm = {
WEBAUTHN_COSE_CREDENTIAL_PARAMETER_CURRENT_VERSION,
WEBAUTHN_CREDENTIAL_TYPE_PUBLIC_KEY,
WEBAUTHN_COSE_ALGORITHM_ECDSA_P256_WITH_SHA256};
coseParams.AppendElement(coseAlgorithm);
winAttachment = WEBAUTHN_AUTHENTICATOR_ATTACHMENT_CROSS_PLATFORM_U2F_V2;
}
WEBAUTHN_COSE_CREDENTIAL_PARAMETERS WebAuthNCredentialParameters = {
static_cast<DWORD>(coseParams.Length()), coseParams.Elements()};
// Exclude Credentials
nsTArray<WEBAUTHN_CREDENTIAL_EX> excludeCredentials;
WEBAUTHN_CREDENTIAL_EX* pExcludeCredentials = nullptr;
nsTArray<WEBAUTHN_CREDENTIAL_EX*> excludeCredentialsPtrs;
WEBAUTHN_CREDENTIAL_LIST excludeCredentialList = {0};
WEBAUTHN_CREDENTIAL_LIST* pExcludeCredentialList = nullptr;
for (auto& cred : aInfo.ExcludeList()) {
uint8_t transports = cred.transports();
DWORD winTransports = 0;
if (transports & U2F_AUTHENTICATOR_TRANSPORT_USB) {
winTransports |= WEBAUTHN_CTAP_TRANSPORT_USB;
}
if (transports & U2F_AUTHENTICATOR_TRANSPORT_NFC) {
winTransports |= WEBAUTHN_CTAP_TRANSPORT_NFC;
}
if (transports & U2F_AUTHENTICATOR_TRANSPORT_BLE) {
winTransports |= WEBAUTHN_CTAP_TRANSPORT_BLE;
}
if (transports & CTAP_AUTHENTICATOR_TRANSPORT_INTERNAL) {
winTransports |= WEBAUTHN_CTAP_TRANSPORT_INTERNAL;
}
WEBAUTHN_CREDENTIAL_EX credential = {
WEBAUTHN_CREDENTIAL_EX_CURRENT_VERSION,
static_cast<DWORD>(cred.id().Length()), (PBYTE)(cred.id().Elements()),
WEBAUTHN_CREDENTIAL_TYPE_PUBLIC_KEY, winTransports};
excludeCredentials.AppendElement(credential);
}
if (!excludeCredentials.IsEmpty()) {
pExcludeCredentials = excludeCredentials.Elements();
for (DWORD i = 0; i < excludeCredentials.Length(); i++) {
excludeCredentialsPtrs.AppendElement(&pExcludeCredentials[i]);
}
excludeCredentialList.cCredentials = excludeCredentials.Length();
excludeCredentialList.ppCredentials = excludeCredentialsPtrs.Elements();
pExcludeCredentialList = &excludeCredentialList;
}
// MakeCredentialOptions
WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS WebAuthNCredentialOptions = {
WEBAUTHN_AUTHENTICATOR_MAKE_CREDENTIAL_OPTIONS_CURRENT_VERSION,
aInfo.TimeoutMS(),
{0, NULL},
{0, NULL},
winAttachment,
winRequireResidentKey,
winUserVerificationReq,
winAttestation,
0, // Flags
NULL, // CancellationId
pExcludeCredentialList};
GUID cancellationId = {0};
if (gWinWebauthnGetCancellationId(&cancellationId) == S_OK) {
WebAuthNCredentialOptions.pCancellationId = &cancellationId;
mCancellationIds.emplace(aTransactionId, &cancellationId);
}
if (cExtensions != 0) {
WebAuthNCredentialOptions.Extensions.cExtensions = cExtensions;
WebAuthNCredentialOptions.Extensions.pExtensions = rgExtension;
}
WEBAUTHN_CREDENTIAL_ATTESTATION* pWebAuthNCredentialAttestation = nullptr;
// Bug 1518876: Get Window Handle from Content process for Windows WebAuthN
// APIs
HWND hWnd = GetForegroundWindow();
HRESULT hr = gWinWebauthnMakeCredential(
hWnd, &rpInfo, &userInfo, &WebAuthNCredentialParameters,
&WebAuthNClientData, &WebAuthNCredentialOptions,
&pWebAuthNCredentialAttestation);
mCancellationIds.erase(aTransactionId);
if (hr == S_OK) {
nsTArray<uint8_t> attObject;
attObject.AppendElements(
pWebAuthNCredentialAttestation->pbAttestationObject,
pWebAuthNCredentialAttestation->cbAttestationObject);
nsTArray<uint8_t> credentialId;
credentialId.AppendElements(pWebAuthNCredentialAttestation->pbCredentialId,
pWebAuthNCredentialAttestation->cbCredentialId);
nsTArray<uint8_t> authenticatorData;
if (aInfo.Extra().isSome()) {
authenticatorData.AppendElements(
pWebAuthNCredentialAttestation->pbAuthenticatorData,
pWebAuthNCredentialAttestation->cbAuthenticatorData);
} else {
PWEBAUTHN_COMMON_ATTESTATION attestation =
reinterpret_cast<PWEBAUTHN_COMMON_ATTESTATION>(
pWebAuthNCredentialAttestation->pvAttestationDecode);
DWORD coseKeyOffset = 32 + // RPIDHash
1 + // Flags
4 + // Counter
16 + // AAGuid
2 + // Credential ID Length field
pWebAuthNCredentialAttestation->cbCredentialId;
// Hardcoding as couldn't finder decoder and it is an ECC key.
DWORD xOffset = coseKeyOffset + 10;
DWORD yOffset = coseKeyOffset + 45;
// Authenticator Data length check.
if (pWebAuthNCredentialAttestation->cbAuthenticatorData < yOffset + 32) {
MaybeAbortRegister(aTransactionId, NS_ERROR_DOM_INVALID_STATE_ERR);
}
authenticatorData.AppendElement(0x05); // Reserved Byte
authenticatorData.AppendElement(0x04); // ECC Uncompressed Key
authenticatorData.AppendElements(
pWebAuthNCredentialAttestation->pbAuthenticatorData + xOffset,
32); // X Coordinate
authenticatorData.AppendElements(
pWebAuthNCredentialAttestation->pbAuthenticatorData + yOffset,
32); // Y Coordinate
authenticatorData.AppendElement(
pWebAuthNCredentialAttestation->cbCredentialId);
authenticatorData.AppendElements(
pWebAuthNCredentialAttestation->pbCredentialId,
pWebAuthNCredentialAttestation->cbCredentialId);
authenticatorData.AppendElements(attestation->pX5c->pbData,
attestation->pX5c->cbData);
authenticatorData.AppendElements(attestation->pbSignature,
attestation->cbSignature);
}
nsTArray<WebAuthnExtensionResult> extensions;
if (pWebAuthNCredentialAttestation->dwVersion >=
WEBAUTHN_CREDENTIAL_ATTESTATION_VERSION_2) {
PCWEBAUTHN_EXTENSIONS pExtensionList =
&pWebAuthNCredentialAttestation->Extensions;
if (pExtensionList->cExtensions != 0 &&
pExtensionList->pExtensions != NULL) {
for (DWORD dwIndex = 0; dwIndex < pExtensionList->cExtensions;
dwIndex++) {
PWEBAUTHN_EXTENSION pExtension =
&pExtensionList->pExtensions[dwIndex];
if (pExtension->pwszExtensionIdentifier &&
(0 == _wcsicmp(pExtension->pwszExtensionIdentifier,
WEBAUTHN_EXTENSIONS_IDENTIFIER_HMAC_SECRET)) &&
pExtension->cbExtension == sizeof(BOOL)) {
BOOL* pCredentialCreatedWithHmacSecret =
(BOOL*)pExtension->pvExtension;
if (*pCredentialCreatedWithHmacSecret) {
extensions.AppendElement(WebAuthnExtensionResultHmacSecret(true));
}
}
}
}
}
WebAuthnMakeCredentialResult result(aInfo.ClientDataJSON(), attObject,
credentialId, authenticatorData,
extensions);
Unused << mTransactionParent->SendConfirmRegister(aTransactionId, result);
ClearTransaction();
gWinWebauthnFreeCredentialAttestation(pWebAuthNCredentialAttestation);
} else {
PCWSTR errorName = gWinWebauthnGetErrorName(hr);
nsresult aError = NS_ERROR_DOM_ABORT_ERR;
if (_wcsicmp(errorName, L"InvalidStateError") == 0) {
aError = NS_ERROR_DOM_INVALID_STATE_ERR;
} else if (_wcsicmp(errorName, L"ConstraintError") == 0 ||
_wcsicmp(errorName, L"UnknownError") == 0) {
aError = NS_ERROR_DOM_UNKNOWN_ERR;
} else if (_wcsicmp(errorName, L"NotSupportedError") == 0) {
aError = NS_ERROR_DOM_INVALID_STATE_ERR;
} else if (_wcsicmp(errorName, L"NotAllowedError") == 0) {
aError = NS_ERROR_DOM_NOT_ALLOWED_ERR;
}
MaybeAbortRegister(aTransactionId, aError);
}
}
void WinWebAuthnManager::MaybeAbortRegister(const uint64_t& aTransactionId,
const nsresult& aError) {
AbortTransaction(aTransactionId, aError);
}
void WinWebAuthnManager::Sign(PWebAuthnTransactionParent* aTransactionParent,
const uint64_t& aTransactionId,
const WebAuthnGetAssertionInfo& aInfo) {
MOZ_LOG(gWinWebAuthnManagerLog, LogLevel::Debug, ("WinWebAuthNSign"));
ClearTransaction();
mTransactionParent = aTransactionParent;
// User Verification Requirement
DWORD winUserVerificationReq = WEBAUTHN_USER_VERIFICATION_REQUIREMENT_ANY;
// RPID
PCWSTR rpID = nullptr;
// Attachment
DWORD winAttachment = WEBAUTHN_AUTHENTICATOR_ATTACHMENT_ANY;
// AppId
BOOL bU2fAppIdUsed = FALSE;
BOOL* pbU2fAppIdUsed = nullptr;
PCWSTR winAppIdentifier = nullptr;
// Client Data
WEBAUTHN_CLIENT_DATA WebAuthNClientData = {
WEBAUTHN_CLIENT_DATA_CURRENT_VERSION, aInfo.ClientDataJSON().Length(),
(BYTE*)(aInfo.ClientDataJSON().get()), WEBAUTHN_HASH_ALGORITHM_SHA_256};
if (aInfo.Extra().isSome()) {
const auto& extra = aInfo.Extra().ref();
for (const WebAuthnExtension& ext : extra.Extensions()) {
if (ext.type() == WebAuthnExtension::TWebAuthnExtensionAppId) {
winAppIdentifier =
ext.get_WebAuthnExtensionAppId().appIdentifier().get();
pbU2fAppIdUsed = &bU2fAppIdUsed;
break;
}
}
// RPID
rpID = aInfo.RpId().get();
// User Verification Requirement
UserVerificationRequirement userVerificationReq =
extra.userVerificationRequirement();
switch (userVerificationReq) {
case UserVerificationRequirement::Required:
winUserVerificationReq =
WEBAUTHN_USER_VERIFICATION_REQUIREMENT_REQUIRED;
break;
case UserVerificationRequirement::Preferred:
winUserVerificationReq =
WEBAUTHN_USER_VERIFICATION_REQUIREMENT_PREFERRED;
break;
case UserVerificationRequirement::Discouraged:
winUserVerificationReq =
WEBAUTHN_USER_VERIFICATION_REQUIREMENT_DISCOURAGED;
break;
default:
winUserVerificationReq = WEBAUTHN_USER_VERIFICATION_REQUIREMENT_ANY;
break;
}
} else {
rpID = aInfo.Origin().get();
winAppIdentifier = aInfo.RpId().get();
pbU2fAppIdUsed = &bU2fAppIdUsed;
winAttachment = WEBAUTHN_AUTHENTICATOR_ATTACHMENT_CROSS_PLATFORM_U2F_V2;
winUserVerificationReq = WEBAUTHN_USER_VERIFICATION_REQUIREMENT_DISCOURAGED;
}
// allow Credentials
nsTArray<WEBAUTHN_CREDENTIAL_EX> allowCredentials;
WEBAUTHN_CREDENTIAL_EX* pAllowCredentials = nullptr;
nsTArray<WEBAUTHN_CREDENTIAL_EX*> allowCredentialsPtrs;
WEBAUTHN_CREDENTIAL_LIST allowCredentialList = {0};
WEBAUTHN_CREDENTIAL_LIST* pAllowCredentialList = nullptr;
for (auto& cred : aInfo.AllowList()) {
uint8_t transports = cred.transports();
DWORD winTransports = 0;
if (transports & U2F_AUTHENTICATOR_TRANSPORT_USB) {
winTransports |= WEBAUTHN_CTAP_TRANSPORT_USB;
}
if (transports & U2F_AUTHENTICATOR_TRANSPORT_NFC) {
winTransports |= WEBAUTHN_CTAP_TRANSPORT_NFC;
}
if (transports & U2F_AUTHENTICATOR_TRANSPORT_BLE) {
winTransports |= WEBAUTHN_CTAP_TRANSPORT_BLE;
}
if (transports & CTAP_AUTHENTICATOR_TRANSPORT_INTERNAL) {
winTransports |= WEBAUTHN_CTAP_TRANSPORT_INTERNAL;
}
WEBAUTHN_CREDENTIAL_EX credential = {
WEBAUTHN_CREDENTIAL_EX_CURRENT_VERSION,
static_cast<DWORD>(cred.id().Length()), (PBYTE)(cred.id().Elements()),
WEBAUTHN_CREDENTIAL_TYPE_PUBLIC_KEY, winTransports};
allowCredentials.AppendElement(credential);
}
if (allowCredentials.Length()) {
pAllowCredentials = allowCredentials.Elements();
for (DWORD i = 0; i < allowCredentials.Length(); i++) {
allowCredentialsPtrs.AppendElement(&pAllowCredentials[i]);
}
allowCredentialList.cCredentials = allowCredentials.Length();
allowCredentialList.ppCredentials = allowCredentialsPtrs.Elements();
pAllowCredentialList = &allowCredentialList;
}
WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS WebAuthNAssertionOptions = {
WEBAUTHN_AUTHENTICATOR_GET_ASSERTION_OPTIONS_CURRENT_VERSION,
aInfo.TimeoutMS(),
{0, NULL},
{0, NULL},
WEBAUTHN_AUTHENTICATOR_ATTACHMENT_ANY,
winUserVerificationReq,
0, // dwFlags
winAppIdentifier,
pbU2fAppIdUsed,
nullptr, // pCancellationId
pAllowCredentialList,
};
GUID cancellationId = {0};
if (gWinWebauthnGetCancellationId(&cancellationId) == S_OK) {
WebAuthNAssertionOptions.pCancellationId = &cancellationId;
mCancellationIds.emplace(aTransactionId, &cancellationId);
}
PWEBAUTHN_ASSERTION pWebAuthNAssertion = nullptr;
// Bug 1518876: Get Window Handle from Content process for Windows WebAuthN
// APIs
HWND hWnd = GetForegroundWindow();
HRESULT hr =
gWinWebauthnGetAssertion(hWnd, rpID, &WebAuthNClientData,
&WebAuthNAssertionOptions, &pWebAuthNAssertion);
mCancellationIds.erase(aTransactionId);
if (hr == S_OK) {
nsTArray<uint8_t> signature;
if (aInfo.Extra().isSome()) {
signature.AppendElements(pWebAuthNAssertion->pbSignature,
pWebAuthNAssertion->cbSignature);
} else {
// AuthenticatorData Length check.
// First 32 bytes: RPID Hash
// Next 1 byte: Flags
// Next 4 bytes: Counter
if (pWebAuthNAssertion->cbAuthenticatorData < 32 + 1 + 4) {
MaybeAbortRegister(aTransactionId, NS_ERROR_DOM_INVALID_STATE_ERR);
}
signature.AppendElement(0x01); // User Presence bit
signature.AppendElements(pWebAuthNAssertion->pbAuthenticatorData +
32 + // RPID Hash length
1, // Flags
4); // Counter length
signature.AppendElements(pWebAuthNAssertion->pbSignature,
pWebAuthNAssertion->cbSignature);
}
nsTArray<uint8_t> keyHandle;
keyHandle.AppendElements(pWebAuthNAssertion->Credential.pbId,
pWebAuthNAssertion->Credential.cbId);
nsTArray<uint8_t> userHandle;
userHandle.AppendElements(pWebAuthNAssertion->pbUserId,
pWebAuthNAssertion->cbUserId);
nsTArray<uint8_t> authenticatorData;
authenticatorData.AppendElements(pWebAuthNAssertion->pbAuthenticatorData,
pWebAuthNAssertion->cbAuthenticatorData);
nsTArray<WebAuthnExtensionResult> extensions;
if (pbU2fAppIdUsed && *pbU2fAppIdUsed) {
extensions.AppendElement(WebAuthnExtensionResultAppId(true));
}
WebAuthnGetAssertionResult result(aInfo.ClientDataJSON(), keyHandle,
signature, authenticatorData, extensions,
signature, userHandle);
Unused << mTransactionParent->SendConfirmSign(aTransactionId, result);
ClearTransaction();
gWinWebauthnFreeAssertion(pWebAuthNAssertion);
} else {
PCWSTR errorName = gWinWebauthnGetErrorName(hr);
nsresult aError = NS_ERROR_DOM_ABORT_ERR;
if (_wcsicmp(errorName, L"InvalidStateError") == 0) {
aError = NS_ERROR_DOM_INVALID_STATE_ERR;
} else if (_wcsicmp(errorName, L"ConstraintError") == 0 ||
_wcsicmp(errorName, L"UnknownError") == 0) {
aError = NS_ERROR_DOM_UNKNOWN_ERR;
} else if (_wcsicmp(errorName, L"NotSupportedError") == 0) {
aError = NS_ERROR_DOM_INVALID_STATE_ERR;
} else if (_wcsicmp(errorName, L"NotAllowedError") == 0) {
aError = NS_ERROR_DOM_NOT_ALLOWED_ERR;
}
MaybeAbortSign(aTransactionId, aError);
}
}
void WinWebAuthnManager::MaybeAbortSign(const uint64_t& aTransactionId,
const nsresult& aError) {
AbortTransaction(aTransactionId, aError);
}
void WinWebAuthnManager::Cancel(PWebAuthnTransactionParent* aParent,
const Tainted<uint64_t>& aTransactionId) {
if (mTransactionParent != aParent) {
return;
}
ClearTransaction();
auto iter = mCancellationIds.find(
MOZ_NO_VALIDATE(aTransactionId,
"Transaction ID is checked against a global container, "
"so an invalid entry can affect another origin's "
"request. This issue is filed as Bug 1696159."));
if (iter != mCancellationIds.end()) {
gWinWebauthnCancelCurrentOperation(iter->second);
}
}
} // namespace dom
} // namespace mozilla
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