| // Copyright 2021 Google LLC |
| // |
| // 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 "tink/jwt/internal/raw_jwt_rsa_ssa_pkcs1_verify_key_manager.h" |
| |
| #include <utility> |
| |
| #include "absl/status/status.h" |
| #include "absl/strings/str_cat.h" |
| #include "absl/strings/string_view.h" |
| #include "tink/internal/bn_util.h" |
| #include "tink/internal/rsa_util.h" |
| #include "tink/internal/ssl_unique_ptr.h" |
| #include "tink/public_key_verify.h" |
| #include "tink/subtle/rsa_ssa_pkcs1_verify_boringssl.h" |
| #include "tink/util/enums.h" |
| #include "tink/util/errors.h" |
| #include "tink/util/protobuf_helper.h" |
| #include "tink/util/status.h" |
| #include "tink/util/statusor.h" |
| #include "tink/util/validation.h" |
| #include "proto/jwt_rsa_ssa_pkcs1.pb.h" |
| |
| namespace crypto { |
| namespace tink { |
| |
| using crypto::tink::util::Enums; |
| using crypto::tink::util::Status; |
| using crypto::tink::util::StatusOr; |
| using google::crypto::tink::HashType; |
| using google::crypto::tink::JwtRsaSsaPkcs1Algorithm; |
| using google::crypto::tink::JwtRsaSsaPkcs1PublicKey; |
| |
| StatusOr<std::unique_ptr<PublicKeyVerify>> |
| RawJwtRsaSsaPkcs1VerifyKeyManager::PublicKeyVerifyFactory::Create( |
| const JwtRsaSsaPkcs1PublicKey& jwt_rsa_ssa_pkcs1_public_key) const { |
| internal::RsaPublicKey rsa_pub_key; |
| rsa_pub_key.n = jwt_rsa_ssa_pkcs1_public_key.n(); |
| rsa_pub_key.e = jwt_rsa_ssa_pkcs1_public_key.e(); |
| |
| util::StatusOr<google::crypto::tink::HashType> hash = |
| RawJwtRsaSsaPkcs1VerifyKeyManager::HashForPkcs1Algorithm( |
| jwt_rsa_ssa_pkcs1_public_key.algorithm()); |
| if (!hash.ok()) { |
| return hash.status(); |
| } |
| internal::RsaSsaPkcs1Params params; |
| params.hash_type = Enums::ProtoToSubtle(*hash); |
| |
| util::StatusOr<std::unique_ptr<subtle::RsaSsaPkcs1VerifyBoringSsl>> verify = |
| subtle::RsaSsaPkcs1VerifyBoringSsl::New(rsa_pub_key, params); |
| if (!verify.ok()) return verify.status(); |
| return {std::move(*verify)}; |
| } |
| |
| Status RawJwtRsaSsaPkcs1VerifyKeyManager::ValidateKey( |
| const JwtRsaSsaPkcs1PublicKey& key) const { |
| Status status = ValidateVersion(key.version(), get_version()); |
| if (!status.ok()) return status; |
| StatusOr<internal::SslUniquePtr<BIGNUM>> n = |
| internal::StringToBignum(key.n()); |
| if (!n.ok()) { |
| return n.status(); |
| } |
| Status modulus_status = |
| internal::ValidateRsaModulusSize(BN_num_bits(n->get())); |
| if (!modulus_status.ok()) { |
| return modulus_status; |
| } |
| Status exponent_status = internal::ValidateRsaPublicExponent(key.e()); |
| if (!exponent_status.ok()) { |
| return exponent_status; |
| } |
| return ValidateAlgorithm(key.algorithm()); |
| } |
| |
| Status RawJwtRsaSsaPkcs1VerifyKeyManager::ValidateAlgorithm( |
| const JwtRsaSsaPkcs1Algorithm& algorithm) { |
| switch (algorithm) { |
| case JwtRsaSsaPkcs1Algorithm::RS256: |
| case JwtRsaSsaPkcs1Algorithm::RS384: |
| case JwtRsaSsaPkcs1Algorithm::RS512: |
| return util::OkStatus(); |
| default: |
| return Status(absl::StatusCode::kInvalidArgument, |
| "Unsupported RSA SSA PKCS1 Algorithm"); |
| } |
| return util::OkStatus(); |
| } |
| |
| StatusOr<HashType> RawJwtRsaSsaPkcs1VerifyKeyManager::HashForPkcs1Algorithm( |
| const JwtRsaSsaPkcs1Algorithm& algorithm) { |
| switch (algorithm) { |
| case JwtRsaSsaPkcs1Algorithm::RS256: |
| return HashType::SHA256; |
| case JwtRsaSsaPkcs1Algorithm::RS384: |
| return HashType::SHA384; |
| case JwtRsaSsaPkcs1Algorithm::RS512: |
| return HashType::SHA512; |
| default: |
| return Status(absl::StatusCode::kInvalidArgument, |
| "Unsupported RSA SSA PKCS1 Algorithm"); |
| } |
| } |
| |
| } // namespace tink |
| } // namespace crypto |