1 // Copyright 2017 Google Inc. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 // 15 /////////////////////////////////////////////////////////////////////////////// 16 17 #ifndef TINK_UTIL_ENUMS_H_ 18 #define TINK_UTIL_ENUMS_H_ 19 20 #include "absl/strings/string_view.h" 21 #include "tink/subtle/common_enums.h" 22 #include "tink/util/statusor.h" 23 #include "proto/common.pb.h" 24 #include "proto/ecdsa.pb.h" 25 #include "proto/tink.pb.h" 26 27 namespace crypto { 28 namespace tink { 29 namespace util { 30 31 // Helpers for translation of common enums between protocol buffer enums, 32 // their string representation, and common enums used in subtle. 33 class Enums { 34 public: 35 // EllipticCurveType. 36 static google::crypto::tink::EllipticCurveType SubtleToProto( 37 crypto::tink::subtle::EllipticCurveType type); 38 39 static crypto::tink::subtle::EllipticCurveType ProtoToSubtle( 40 google::crypto::tink::EllipticCurveType type); 41 42 // EcPointFormat. 43 static google::crypto::tink::EcPointFormat SubtleToProto( 44 crypto::tink::subtle::EcPointFormat format); 45 46 static crypto::tink::subtle::EcPointFormat ProtoToSubtle( 47 google::crypto::tink::EcPointFormat format); 48 49 // HashType. 50 static google::crypto::tink::HashType SubtleToProto( 51 crypto::tink::subtle::HashType type); 52 53 static crypto::tink::subtle::HashType ProtoToSubtle( 54 google::crypto::tink::HashType type); 55 56 // Returns the length in bytes of the given hash type `hash_type`. Returns 57 // INVALID_ARGUMENT if the algorithm is unsupported. 58 static util::StatusOr<int> HashLength( 59 google::crypto::tink::HashType hash_type); 60 61 // EcdsaSignatureEncoding. 62 static google::crypto::tink::EcdsaSignatureEncoding SubtleToProto( 63 crypto::tink::subtle::EcdsaSignatureEncoding encoding); 64 65 static crypto::tink::subtle::EcdsaSignatureEncoding ProtoToSubtle( 66 google::crypto::tink::EcdsaSignatureEncoding encoding); 67 68 // Printable names for common enums. 69 static const char* KeyStatusName( 70 google::crypto::tink::KeyStatusType key_status_type); 71 static const char* HashName(google::crypto::tink::HashType hash_type); 72 static const char* KeyMaterialName( 73 google::crypto::tink::KeyData::KeyMaterialType key_material_type); 74 static const char* OutputPrefixName( 75 google::crypto::tink::OutputPrefixType output_prefix_type); 76 77 static google::crypto::tink::KeyStatusType KeyStatus(absl::string_view name); 78 static google::crypto::tink::HashType Hash(absl::string_view name); 79 static google::crypto::tink::KeyData::KeyMaterialType KeyMaterial( 80 absl::string_view name); 81 static google::crypto::tink::OutputPrefixType OutputPrefix( 82 absl::string_view name); 83 }; 84 85 } // namespace util 86 } // namespace tink 87 } // namespace crypto 88 89 #endif // TINK_UTIL_ENUMS_H_ 90