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/**
* Copyright (C) 2022-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include "mongo/db/matcher/expression_array.h"
#include "mongo/db/pipeline/expression_context_for_test.h"
#include "mongo/db/query/fle/encrypted_predicate.h"
#include "mongo/db/query/fle/equality_predicate.h"
#include "mongo/db/query/fle/query_rewriter_interface.h"
#include "mongo/db/query/fle/range_predicate.h"
#include "mongo/unittest/unittest.h"
#include "mongo/util/overloaded_visitor.h"
namespace mongo::fle {
using TagMap = std::map<std::pair<StringData, int>, std::vector<PrfBlock>>;
/*
* The MockServerRewrite allows unit testing individual predicate rewrites without going through the
* real server rewrite that traverses full expression trees.
*/
class MockServerRewrite : public QueryRewriterInterface {
public:
MockServerRewrite() : _expCtx((new ExpressionContextForTest())) {}
const FLEStateCollectionReader* getEscReader() const override {
return nullptr;
}
const FLEStateCollectionReader* getEccReader() const override {
return nullptr;
}
EncryptedCollScanMode getEncryptedCollScanMode() const override {
return _mode;
};
ExpressionContext* getExpressionContext() const {
return _expCtx.get();
}
void setForceEncryptedCollScanForTest() {
_mode = EncryptedCollScanMode::kForceAlways;
}
private:
boost::intrusive_ptr<ExpressionContextForTest> _expCtx;
EncryptedCollScanMode _mode{EncryptedCollScanMode::kUseIfNeeded};
};
class EncryptedPredicateRewriteTest : public unittest::Test {
public:
EncryptedPredicateRewriteTest() {}
void setUp() override {}
void tearDown() override {}
static std::unique_ptr<MatchExpression> makeInExpr(StringData fieldname,
BSONArray disjunctions) {
auto inExpr = std::make_unique<InMatchExpression>(fieldname);
std::vector<BSONElement> elems;
disjunctions.elems(elems);
uassertStatusOK(inExpr->setEqualities(elems));
inExpr->setBackingBSON(std::move(disjunctions));
return inExpr;
}
static std::unique_ptr<MatchExpression> makeElemMatchWithIn(StringData fieldname,
BSONArray disjunctions) {
auto elemMatchExpr = std::make_unique<ElemMatchValueMatchExpression>(fieldname);
elemMatchExpr->add(makeInExpr(fieldname, disjunctions));
return elemMatchExpr;
}
/*
* Assertion helper for tag disjunction rewrite.
*/
void assertRewriteToTags(const EncryptedPredicate& pred,
MatchExpression* input,
BSONArray expectedTags) {
auto actual = pred.rewrite(input);
auto expected = makeElemMatchWithIn(kSafeContent, expectedTags);
ASSERT_BSONOBJ_EQ(actual->serialize(),
static_cast<MatchExpression*>(expected.get())->serialize());
}
template <typename T>
void assertRewriteForOp(const EncryptedPredicate& pred,
BSONElement rhs,
std::vector<PrfBlock> allTags) {
auto inputExpr = T("age"_sd, rhs);
assertRewriteToTags(pred, &inputExpr, toBSONArray(std::move(allTags)));
}
protected:
MockServerRewrite _mock{};
ExpressionContextForTest _expCtx;
};
// Helper functions for creating encrypted BinData blobs.
template <typename T>
std::vector<uint8_t> toEncryptedVector(EncryptedBinDataType dt, T t) {
BSONObj obj = t.toBSON();
std::vector<uint8_t> buf(obj.objsize() + 1);
buf[0] = static_cast<uint8_t>(dt);
std::copy(obj.objdata(), obj.objdata() + obj.objsize(), buf.data() + 1);
return buf;
}
template <typename T>
void toEncryptedBinData(StringData field, EncryptedBinDataType dt, T t, BSONObjBuilder* builder) {
auto buf = toEncryptedVector(dt, t);
builder->appendBinData(field, buf.size(), BinDataType::Encrypt, buf.data());
}
// Sample encryption keys for creating mock encrypted payloads.
constexpr auto kIndexKeyId = "12345678-1234-9876-1234-123456789012"_sd;
constexpr auto kUserKeyId = "ABCDEFAB-1234-9876-1234-123456789012"_sd;
static UUID indexKeyId = uassertStatusOK(UUID::parse(kIndexKeyId.toString()));
static UUID userKeyId = uassertStatusOK(UUID::parse(kUserKeyId.toString()));
inline const FLEIndexKey& getIndexKey() {
static std::string indexVec = hexblob::decode(
"7dbfebc619aa68a659f64b8e23ccd21644ac326cb74a26840c3d2420176c40ae088294d00ad6cae9684237b21b754cf503f085c25cd320bf035c3417416e1e6fe3d9219f79586582112740b2add88e1030d91926ae8afc13ee575cfb8bb965b7"_sd);
static FLEIndexKey indexKey(KeyMaterial(indexVec.begin(), indexVec.end()));
return indexKey;
}
inline const FLEUserKey& getUserKey() {
static std::string userVec = hexblob::decode(
"a7ddbc4c8be00d51f68d9d8e485f351c8edc8d2206b24d8e0e1816d005fbe520e489125047d647b0d8684bfbdbf09c304085ed086aba6c2b2b1677ccc91ced8847a733bf5e5682c84b3ee7969e4a5fe0e0c21e5e3ee190595a55f83147d8de2a"_sd);
static FLEUserKey userKey(KeyMaterial(userVec.begin(), userVec.end()));
return userKey;
}
} // namespace mongo::fle
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