diff options
Diffstat (limited to 'Firestore/core/src/firebase/firestore')
6 files changed, 237 insertions, 0 deletions
diff --git a/Firestore/core/src/firebase/firestore/base/port.h b/Firestore/core/src/firebase/firestore/base/port.h new file mode 100644 index 0000000..37d1041 --- /dev/null +++ b/Firestore/core/src/firebase/firestore/base/port.h @@ -0,0 +1,33 @@ +/* + * Copyright 2017 Google + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_BASE_PORT_H_ +#define FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_BASE_PORT_H_ + +#if defined(__APPLE__) +// On Apple platforms we support building via Cocoapods without CMake. When +// building this way we can't test the presence of features so predefine all +// the platform-support feature macros to their expected values. + +// All supported Apple platforms have arc4random(3). +#define HAVE_ARC4RANDOM 1 + +#else + +#error "Unknown platform." +#endif // defined(__APPLE__) + +#endif // FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_BASE_PORT_H_ diff --git a/Firestore/core/src/firebase/firestore/util/CMakeLists.txt b/Firestore/core/src/firebase/firestore/util/CMakeLists.txt new file mode 100644 index 0000000..ce81363 --- /dev/null +++ b/Firestore/core/src/firebase/firestore/util/CMakeLists.txt @@ -0,0 +1,19 @@ +# Copyright 2017 Google +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +add_library( + firebase_firestore_util + autoid.cc + secure_random_arc4random.cc +) diff --git a/Firestore/core/src/firebase/firestore/util/autoid.cc b/Firestore/core/src/firebase/firestore/util/autoid.cc new file mode 100644 index 0000000..10a2cde --- /dev/null +++ b/Firestore/core/src/firebase/firestore/util/autoid.cc @@ -0,0 +1,56 @@ +/* + * Copyright 2017 Google + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "Firestore/core/src/firebase/firestore/util/autoid.h" + +#include <random> +#include <string> + +#include "Firestore/core/src/firebase/firestore/util/secure_random.h" + +namespace firebase { +namespace firestore { +namespace util { + +namespace { + +const int kAutoIdLength = 20; +const char kAutoIdAlphabet[] = + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; + +SecureRandom shared_random; + +} // namespace + +std::string CreateAutoId() { + std::string auto_id; + auto_id.reserve(kAutoIdLength); + + // -2 here because: + // * sizeof(kAutoIdAlphabet) includes the trailing null terminator + // * uniform_int_distribution is inclusive on both sizes + std::uniform_int_distribution<int> letters(0, sizeof(kAutoIdAlphabet) - 2); + + for (int i = 0; i < kAutoIdLength; i++) { + int rand_index = letters(shared_random); + auto_id.append(1, kAutoIdAlphabet[rand_index]); + } + return auto_id; +} + +} // namespace util +} // namespace firestore +} // namespace firebase diff --git a/Firestore/core/src/firebase/firestore/util/autoid.h b/Firestore/core/src/firebase/firestore/util/autoid.h new file mode 100644 index 0000000..22d7d7d --- /dev/null +++ b/Firestore/core/src/firebase/firestore/util/autoid.h @@ -0,0 +1,33 @@ +/* + * Copyright 2017 Google + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_UTIL_AUTOID_H_ +#define FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_UTIL_AUTOID_H_ + +#include <string> + +namespace firebase { +namespace firestore { +namespace util { + +// Generates a random ID suitable for use as a document ID. +std::string CreateAutoId(); + +} // namespace util +} // namespace firestore +} // namespace firebase + +#endif // FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_UTIL_AUTOID_H_ diff --git a/Firestore/core/src/firebase/firestore/util/secure_random.h b/Firestore/core/src/firebase/firestore/util/secure_random.h new file mode 100644 index 0000000..72be1bd --- /dev/null +++ b/Firestore/core/src/firebase/firestore/util/secure_random.h @@ -0,0 +1,59 @@ +/* + * Copyright 2017 Google + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_UTIL_SECURE_RANDOM_H_ +#define FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_UTIL_SECURE_RANDOM_H_ + +#include <stdint.h> + +#include <limits> + +namespace firebase { +namespace firestore { +namespace util { + +// A "secure" pseudorandom number generator, suitable for generating +// unguessable identifiers. This exists because +// +// * std::mt19937 is blazing fast but its outputs can be guessed once enough +// previous outputs have been observed. +// * std::random_device isn't guaranteed to come from a secure PRNG or be +// fast. +// +// The implementation satisfies the C++11 UniformRandomBitGenerator concept and +// delegates to an implementation that generates high quality random values +// quickly with periodic reseeding. +class SecureRandom { + public: + // C++11 UniformRandomBitGenerator interface + using result_type = uint32_t; + + static constexpr result_type min() { + return std::numeric_limits<result_type>::min(); + } + + static constexpr result_type max() { + return std::numeric_limits<result_type>::max(); + } + + result_type operator()(); +}; + +} // namespace util +} // namespace firestore +} // namespace firebase + +#endif // FIRESTORE_CORE_SRC_FIREBASE_FIRESTORE_UTIL_SECURE_RANDOM_H_ diff --git a/Firestore/core/src/firebase/firestore/util/secure_random_arc4random.cc b/Firestore/core/src/firebase/firestore/util/secure_random_arc4random.cc new file mode 100644 index 0000000..a76ade3 --- /dev/null +++ b/Firestore/core/src/firebase/firestore/util/secure_random_arc4random.cc @@ -0,0 +1,37 @@ +/* + * Copyright 2017 Google + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "Firestore/core/src/firebase/firestore/util/secure_random.h" + +#include "Firestore/core/src/firebase/firestore/base/port.h" + +#if HAVE_ARC4RANDOM + +#include <stdlib.h> + +namespace firebase { +namespace firestore { +namespace util { + +SecureRandom::result_type SecureRandom::operator()() { + return arc4random(); +} + +} // namespace util +} // namespace firestore +} // namespace firebase + +#endif // HAVE_ARC4RANDOM |