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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/credentialmanagement/identity_credential.h"
#include "base/metrics/histogram_macros.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise_resolver.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_credential_request_options.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_identity_credential_request_options.h"
#include "third_party/blink/renderer/core/dom/dom_exception.h"
#include "third_party/blink/renderer/core/frame/csp/content_security_policy.h"
#include "third_party/blink/renderer/modules/credentialmanagement/credential_manager_proxy.h"
#include "third_party/blink/renderer/modules/credentialmanagement/credential_manager_type_converters.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
namespace blink {
namespace {
using mojom::blink::DisconnectStatus;
using mojom::blink::RequestTokenStatus;
constexpr char kIdentityCredentialType[] = "identity";
// These values are persisted to logs. Entries should not be renumbered and
// numeric values should never be reused.
enum class FedCmCspStatus {
kSuccess = 0,
kFailedPathButPassedOrigin = 1,
kFailedOrigin = 2,
kMaxValue = kFailedOrigin
};
void OnDisconnect(ScriptPromiseResolver<IDLUndefined>* resolver,
DisconnectStatus status) {
if (status != DisconnectStatus::kSuccess) {
resolver->RejectWithDOMException(DOMExceptionCode::kNetworkError,
"Error disconnecting account.");
return;
}
resolver->Resolve();
}
} // namespace
IdentityCredential* IdentityCredential::Create(const String& token,
bool is_auto_selected,
const String& config_url) {
return MakeGarbageCollected<IdentityCredential>(token, is_auto_selected,
config_url);
}
bool IdentityCredential::IsRejectingPromiseDueToCSP(
ContentSecurityPolicy* policy,
ScriptPromiseResolverBase* resolver,
const KURL& provider_url) {
if (policy->AllowConnectToSource(provider_url, provider_url,
RedirectStatus::kNoRedirect,
ReportingDisposition::kSuppressReporting)) {
UMA_HISTOGRAM_ENUMERATION("Blink.FedCm.Status.Csp",
FedCmCspStatus::kSuccess);
return false;
}
// kFollowedRedirect ignores paths.
if (policy->AllowConnectToSource(provider_url, provider_url,
RedirectStatus::kFollowedRedirect)) {
// Log how frequently FedCM is attempted from RPs:
// (1) With specific paths in their connect-src policy
// AND
// (2) Whose connect-src policy does not whitelist FedCM endpoints
UMA_HISTOGRAM_ENUMERATION("Blink.FedCm.Status.Csp",
FedCmCspStatus::kFailedPathButPassedOrigin);
} else {
UMA_HISTOGRAM_ENUMERATION("Blink.FedCm.Status.Csp",
FedCmCspStatus::kFailedOrigin);
}
WTF::String error =
"Refused to connect to '" + provider_url.ElidedString() +
"' because it violates the document's Content Security Policy.";
resolver->RejectWithDOMException(DOMExceptionCode::kNetworkError, error);
return true;
}
IdentityCredential::IdentityCredential(const String& token,
bool is_auto_selected,
const String& config_url)
: Credential(/* id = */ "", kIdentityCredentialType),
token_(token),
is_auto_selected_(is_auto_selected),
config_url_(config_url) {}
bool IdentityCredential::IsIdentityCredential() const {
return true;
}
// static
ScriptPromise<IDLUndefined> IdentityCredential::disconnect(
ScriptState* script_state,
const blink::IdentityCredentialDisconnectOptions* options,
ExceptionState& exception_state) {
auto* resolver =
MakeGarbageCollected<ScriptPromiseResolver<IDLUndefined>>(script_state);
auto promise = resolver->Promise();
// configURL, accountHint, and clientId are required. But the latter is marked
// optional due to the dictionary being reused for digital credentials. So we
// have to check that one manually.
if (!options->hasClientId()) {
resolver->RejectWithTypeError("clientId is required");
return promise;
}
if (!resolver->GetExecutionContext()->IsFeatureEnabled(
network::mojom::PermissionsPolicyFeature::kIdentityCredentialsGet)) {
resolver->RejectWithDOMException(
DOMExceptionCode::kNotAllowedError,
"The 'identity-credentials-get' feature is not enabled in this "
"document.");
return promise;
}
KURL provider_url(options->configURL());
if (!provider_url.IsValid()) {
resolver->RejectWithDOMException(DOMExceptionCode::kInvalidStateError,
"configURL is invalid");
return promise;
}
auto* auth_request =
CredentialManagerProxy::From(script_state)->FederatedAuthRequest();
ContentSecurityPolicy* policy =
resolver->GetExecutionContext()
->GetContentSecurityPolicyForCurrentWorld();
if (IsRejectingPromiseDueToCSP(policy, resolver, provider_url)) {
return promise;
}
mojom::blink::IdentityCredentialDisconnectOptionsPtr disconnect_options =
blink::mojom::blink::IdentityCredentialDisconnectOptions::From(*options);
auth_request->Disconnect(
std::move(disconnect_options),
WTF::BindOnce(&OnDisconnect, WrapPersistent(resolver)));
return promise;
}
} // namespace blink
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