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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/policy/core/common/android/policy_converter.h"
#include <algorithm>
#include <memory>
#include <string>
#include <utility>
#include "base/android/jni_android.h"
#include "base/android/jni_array.h"
#include "base/android/jni_string.h"
#include "base/check_op.h"
#include "base/json/json_reader.h"
#include "base/notreached.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/values.h"
#include "components/policy/core/common/policy_bundle.h"
#include "components/policy/core/common/policy_map.h"
#include "components/policy/core/common/policy_namespace.h"
#include "components/policy/core/common/policy_types.h"
#include "components/policy/core/common/schema.h"
// Must come after all headers that specialize FromJniType() / ToJniType().
#include "components/policy/android/jni_headers/PolicyConverter_jni.h"
using base::android::ConvertJavaStringToUTF8;
using base::android::JavaRef;
namespace policy {
namespace android {
namespace {
// Tries to parse lists as comma-separated values. Extra spaces are ignored, so
// "foo,bar" and "foo, bar" are equivalent. This is best effort and intended to
// cover common cases applicable to the majority of policies. Use JSON encoding
// to handle corner cases not covered by this.
std::optional<base::Value> SplitCommaSeparatedList(
const std::string& str_value) {
DCHECK(!str_value.empty());
base::Value::List as_list;
std::vector<std::string> items_as_vector = base::SplitString(
str_value, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
std::ranges::for_each(items_as_vector, [&as_list](const std::string& item) {
as_list.Append(base::Value(item));
});
return base::Value(std::move(as_list));
}
} // namespace
PolicyConverter::PolicyConverter(const Schema* policy_schema)
: policy_schema_(policy_schema) {
JNIEnv* env = base::android::AttachCurrentThread();
java_obj_.Reset(
env,
Java_PolicyConverter_create(env, reinterpret_cast<intptr_t>(this)).obj());
DCHECK(!java_obj_.is_null());
}
PolicyConverter::~PolicyConverter() {
Java_PolicyConverter_onNativeDestroyed(base::android::AttachCurrentThread(),
java_obj_);
}
PolicyBundle PolicyConverter::GetPolicyBundle() {
PolicyBundle filled_bundle = std::move(policy_bundle_);
policy_bundle_ = PolicyBundle();
return filled_bundle;
}
base::android::ScopedJavaLocalRef<jobject> PolicyConverter::GetJavaObject() {
return base::android::ScopedJavaLocalRef<jobject>(java_obj_);
}
void PolicyConverter::SetPolicyBoolean(JNIEnv* env,
const JavaRef<jobject>& obj,
const JavaRef<jstring>& policyKey,
jboolean value) {
SetPolicyValue(ConvertJavaStringToUTF8(env, policyKey),
base::Value(static_cast<bool>(value)));
}
void PolicyConverter::SetPolicyInteger(JNIEnv* env,
const JavaRef<jobject>& obj,
const JavaRef<jstring>& policyKey,
jint value) {
SetPolicyValue(ConvertJavaStringToUTF8(env, policyKey),
base::Value(static_cast<int>(value)));
}
void PolicyConverter::SetPolicyString(JNIEnv* env,
const JavaRef<jobject>& obj,
const JavaRef<jstring>& policyKey,
const JavaRef<jstring>& value) {
SetPolicyValue(ConvertJavaStringToUTF8(env, policyKey),
base::Value(ConvertJavaStringToUTF8(env, value)));
}
void PolicyConverter::SetPolicyStringArray(JNIEnv* env,
const JavaRef<jobject>& obj,
const JavaRef<jstring>& policyKey,
const JavaRef<jobjectArray>& array) {
SetPolicyValue(ConvertJavaStringToUTF8(env, policyKey),
base::Value(ConvertJavaStringArrayToListValue(env, array)));
}
// static
base::Value::List PolicyConverter::ConvertJavaStringArrayToListValue(
JNIEnv* env,
const JavaRef<jobjectArray>& array) {
DCHECK(!array.is_null());
base::android::JavaObjectArrayReader<jstring> array_reader(array);
DCHECK_GE(array_reader.size(), 0)
<< "Invalid array length: " << array_reader.size();
base::Value::List list_value;
for (auto j_str : array_reader)
list_value.Append(ConvertJavaStringToUTF8(env, j_str));
return list_value;
}
// static
std::optional<base::Value> PolicyConverter::ConvertValueToSchema(
base::Value value,
const Schema& schema) {
if (!schema.valid())
return value;
switch (schema.type()) {
case base::Value::Type::NONE:
return base::Value();
case base::Value::Type::BOOLEAN: {
if (value.is_string()) {
const std::string& string_value = value.GetString();
if (string_value.compare("true") == 0)
return base::Value(true);
if (string_value.compare("false") == 0)
return base::Value(false);
return value;
}
if (value.is_int())
return base::Value(value.GetInt() != 0);
return value;
}
case base::Value::Type::INTEGER: {
if (value.is_string()) {
const std::string& string_value = value.GetString();
int int_value = 0;
if (base::StringToInt(string_value, &int_value))
return base::Value(int_value);
}
return value;
}
case base::Value::Type::DOUBLE: {
if (value.is_string()) {
const std::string& string_value = value.GetString();
double double_value = 0;
if (base::StringToDouble(string_value, &double_value))
return base::Value(double_value);
}
return value;
}
// String can't be converted from other types.
case base::Value::Type::STRING: {
return value;
}
// Binary is not a valid schema type.
case base::Value::Type::BINARY: {
NOTREACHED();
}
// Complex types have to be deserialized from JSON.
case base::Value::Type::DICT: {
if (value.is_string()) {
const std::string str_value = value.GetString();
// Do not try to convert empty string to list/dictionaries, since most
// likely the value was not simply not set by the UEM.
if (str_value.empty()) {
return std::nullopt;
}
std::optional<base::Value> decoded_value = base::JSONReader::Read(
str_value, base::JSONParserOptions::JSON_ALLOW_TRAILING_COMMAS);
if (decoded_value) {
return decoded_value;
}
}
return value;
}
case base::Value::Type::LIST: {
if (value.is_string()) {
const std::string str_value = value.GetString();
// Do not try to convert empty string to list/dictionaries, since most
// likely the value was not simply not set by the UEM.
if (str_value.empty()) {
return std::nullopt;
}
std::optional<base::Value> decoded_value = base::JSONReader::Read(
str_value, base::JSONParserOptions::JSON_ALLOW_TRAILING_COMMAS);
return decoded_value ? std::move(decoded_value)
: SplitCommaSeparatedList(str_value);
}
return value;
}
}
NOTREACHED();
}
void PolicyConverter::SetPolicyValueForTesting(const std::string& key,
base::Value value) {
PolicyConverter::SetPolicyValue(key, std::move(value));
}
void PolicyConverter::SetPolicyValue(const std::string& key,
base::Value value) {
const Schema schema = policy_schema_->GetKnownProperty(key);
const PolicyNamespace ns(POLICY_DOMAIN_CHROME, std::string());
std::optional<base::Value> converted_value =
ConvertValueToSchema(std::move(value), schema);
if (converted_value) {
// Do not set list/dictionary policies that are sent as empty strings from
// the UEM. This is common on Android when the UEM pushes the policy with
// managed configurations.
policy_bundle_.Get(ns).Set(key, POLICY_LEVEL_MANDATORY,
POLICY_SCOPE_MACHINE, POLICY_SOURCE_PLATFORM,
std::move(converted_value), nullptr);
}
}
} // namespace android
} // namespace policy
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