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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import "chrome/browser/enterprise/platform_auth/extensible_enterprise_sso_provider_mac.h"
#import <Foundation/Foundation.h>
#import <string>
#import <utility>
#import <vector>
#import "base/barrier_callback.h"
#import "base/functional/callback.h"
#import "base/metrics/histogram_functions.h"
#import "base/strings/strcat.h"
#import "base/strings/sys_string_conversions.h"
#import "base/task/bind_post_task.h"
#import "chrome/browser/browser_process.h"
#import "chrome/browser/enterprise/platform_auth/extensible_enterprise_sso_entra.h"
#import "chrome/browser/enterprise/platform_auth/extensible_enterprise_sso_policy_handler.h"
#import "chrome/common/pref_names.h"
#import "components/policy/core/common/policy_logger.h"
#import "components/prefs/pref_service.h"
#import "net/base/apple/http_response_headers_util.h"
#import "net/base/apple/url_conversions.h"
#import "net/http/http_request_headers.h"
#import "net/http/http_response_headers.h"
#import "net/http/http_util.h"
#import "net/url_request/url_request.h"
#import "url/gurl.h"
namespace enterprise_auth {
namespace {
constexpr std::array<const char*, 1> kSupportedIdps{
kMicrosoftIdentityProvider,
};
// Empty function used to ensure SSOServiceEntraAuthControllerDelegate does not
// get destroyed until the data is fetched.
void OnDataFetched(SSOServiceEntraAuthControllerDelegate*) {
VLOG_POLICY(2, EXTENSIBLE_SSO) << "[ExtensibleEnterpriseSSO] Deleting "
"SSOServiceEntraAuthControllerDelegate";
}
void RecordMetrics(
std::unique_ptr<ExtensibleEnterpriseSSOProvider::Metrics> metrics) {
// TODO(crbug.com/340868357) Check for known hosts.
if (metrics->url_is_supported) {
base::UmaHistogramBoolean(
"Enterprise.ExtensibleEnterpriseSSO.Supported.Result",
metrics->success);
base::UmaHistogramTimes(
metrics->success
? "Enterprise.ExtensibleEnterpriseSSO.Supported.Success.Duration"
: "Enterprise.ExtensibleEnterpriseSSO.Supported.Failure.Duration",
metrics->end_time - metrics->start_time);
} else {
base::UmaHistogramTimes(
"Enterprise.ExtensibleEnterpriseSSO.NotSupported.Duration",
metrics->end_time - metrics->start_time);
}
}
// Function that takes all the possible idp handlers' results and records
// metrics about duration, success and returns the headers of the handler that
// was able to authenticate the request.
void OnAuthorizationDone(
PlatformAuthProviderManager::GetDataCallback callback,
std::unique_ptr<ExtensibleEnterpriseSSOProvider::Metrics> metrics,
std::vector<
std::unique_ptr<ExtensibleEnterpriseSSOProvider::DelegateResult>>
results) {
net::HttpRequestHeaders headers;
for (const auto& result : results) {
metrics->success |= result->success;
if (result->success && !result->headers.IsEmpty()) {
headers = result->headers;
break;
}
}
metrics->end_time = base::Time::Now();
RecordMetrics(std::move(metrics));
std::move(callback).Run(std::move(headers));
}
} // namespace
ExtensibleEnterpriseSSOProvider::Metrics::Metrics(const std::string& host)
: host(host), start_time(base::Time::Now()) {}
ExtensibleEnterpriseSSOProvider::Metrics::~Metrics() = default;
ExtensibleEnterpriseSSOProvider::DelegateResult::DelegateResult(
const std::string& name,
bool success,
net::HttpRequestHeaders headers)
: name(name), success(success), headers(std::move(headers)) {}
ExtensibleEnterpriseSSOProvider::DelegateResult::~DelegateResult() = default;
ExtensibleEnterpriseSSOProvider::ExtensibleEnterpriseSSOProvider() = default;
ExtensibleEnterpriseSSOProvider::~ExtensibleEnterpriseSSOProvider() = default;
bool ExtensibleEnterpriseSSOProvider::SupportsOriginFiltering() {
return false;
}
void ExtensibleEnterpriseSSOProvider::FetchOrigins(
FetchOriginsCallback on_fetch_complete) {
// Origin filtering is not supported.
NOTREACHED();
}
void ExtensibleEnterpriseSSOProvider::GetData(
const GURL& url,
PlatformAuthProviderManager::GetDataCallback callback) {
auto metrics = std::make_unique<Metrics>(url.host());
NSURL* nativeUrl = net::NSURLWithGURL(url);
ASAuthorizationSingleSignOnProvider* auth_provider =
[ASAuthorizationSingleSignOnProvider
authorizationProviderWithIdentityProviderURL:nativeUrl];
metrics->url_is_supported = auth_provider.canPerformAuthorization;
if (!auth_provider.canPerformAuthorization) {
OnAuthorizationDone(std::move(callback), std::move(metrics), {});
return;
}
const base::Value::List& supported_idps =
g_browser_process->local_state()->GetList(
prefs::kExtensibleEnterpriseSSOEnabledIdps);
// Wait for all idps to call this before continuing. This allows to launch all
// of them in parallel, waiting for all of their results and picking the right
// ones.
auto barrier = base::BarrierCallback<
std::unique_ptr<ExtensibleEnterpriseSSOProvider::DelegateResult>>(
supported_idps.size(),
base::BindOnce(&OnAuthorizationDone, std::move(callback),
std::move(metrics)));
for (const base::Value& idp_value : supported_idps) {
// Setup Microsoft Entra handler
if (const std::string* idp = idp_value.GetIfString();
idp && *idp == kMicrosoftIdentityProvider) {
SSOServiceEntraAuthControllerDelegate* delegate =
[[SSOServiceEntraAuthControllerDelegate alloc]
initWithAuthorizationSingleSignOnProvider:auth_provider];
// Pass `delegate` as a callback parameter so that it lives beyond the
// scope of this function and until the callback is called.
auto final_callback = base::BindPostTaskToCurrentDefault(
barrier.Then(base::BindRepeating(&OnDataFetched, delegate)));
[delegate getAuthHeaders:nativeUrl
withCallback:std::move(final_callback)];
}
}
}
// static
std::set<std::string>
ExtensibleEnterpriseSSOProvider::GetSupportedIdentityProviders() {
return {kSupportedIdps.begin(), kSupportedIdps.end()};
}
// static
base::Value::List
ExtensibleEnterpriseSSOProvider::GetSupportedIdentityProvidersList() {
base::Value::List idps;
for (const char* idp : kSupportedIdps) {
idps.Append(idp);
}
return idps;
}
} // namespace enterprise_auth
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