| // 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. |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #ifndef TINK_EXPERIMENTAL_PQCRYPTO_SIGNATURE_SUBTLE_SPHINCS_HELPER_PQCLEAN_H_ |
| #define TINK_EXPERIMENTAL_PQCRYPTO_SIGNATURE_SUBTLE_SPHINCS_HELPER_PQCLEAN_H_ |
| |
| #include <memory> |
| #include <vector> |
| |
| #include "absl/base/attributes.h" |
| |
| namespace crypto { |
| namespace tink { |
| namespace subtle { |
| |
| class SphincsHelperPqclean { |
| public: |
| SphincsHelperPqclean(int public_key_size, int signature_length) |
| : public_key_size_(public_key_size), |
| signature_length_(signature_length) {} |
| |
| SphincsHelperPqclean(const SphincsHelperPqclean &other) = delete; |
| SphincsHelperPqclean &operator=(const SphincsHelperPqclean &other) = delete; |
| virtual ~SphincsHelperPqclean() {} |
| |
| // Arguments: |
| // sig - output signature (allocated buffer of size at least |
| // GetSignatureLength()); siglen - output length of signature; m - message |
| // to be signed; mlen - length of message; sk - bit-packed secret key. |
| // Computes signature. Returns 0 (success). |
| virtual ABSL_MUST_USE_RESULT int Sign(uint8_t *sig, size_t *siglen, |
| const uint8_t *m, size_t mlen, |
| const uint8_t *sk) const = 0; |
| |
| // Arguments: |
| // sig - input signature; siglen - length of signature; |
| // m - input message; mlen - length of message; pk - bit-packed public key. |
| // Verifies the signature. Returns 0 (success). |
| virtual ABSL_MUST_USE_RESULT int Verify(const uint8_t *sig, size_t siglen, |
| const uint8_t *m, size_t mlen, |
| const uint8_t *pk) const = 0; |
| |
| // Arguments: |
| // pk - output public key (allocated buffer of the corresponding public key |
| // size); sk - output private key (allocated buffer of the corresponding |
| // private key size) |
| // Gnerates the key pair. Returns 0 (success). |
| virtual ABSL_MUST_USE_RESULT int Keygen(uint8_t *pk, uint8_t *sk) const = 0; |
| |
| int GetPublicKeySize() const { return public_key_size_; } |
| int GetSignatureLength() const { return signature_length_; } |
| |
| private: |
| int public_key_size_; |
| int signature_length_; |
| }; |
| |
| // Returns a pointer to the corresponding SphincsHelperPqclean derived class. |
| // Will be used for the key generation, signing and verifing. |
| const SphincsHelperPqclean &GetSphincsHelperPqclean(int hash_type, int variant, |
| int key_size, |
| int signature_length); |
| |
| } // namespace subtle |
| } // namespace tink |
| } // namespace crypto |
| |
| #endif // TINK_EXPERIMENTAL_PQCRYPTO_SIGNATURE_SUBTLE_SPHINCS_HELPER_PQCLEAN_H_ |