mirror of https://git.matrix.org/git/olm.git
62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
/* Copyright 2015 OpenMarket Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef UTILITY_HH_
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#define UTILITY_HH_
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#include "olm/error.h"
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#include <cstddef>
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#include <cstdint>
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struct _olm_ed25519_public_key;
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namespace olm {
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struct Utility {
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Utility();
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OlmErrorCode last_error;
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/** The length of a SHA-256 hash in bytes. */
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std::size_t sha256_length() const;
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/** Compute a SHA-256 hash. Returns the length of the SHA-256 hash in bytes
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* on success. Returns std::size_t(-1) on failure. On failure last_error
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* will be set with an error code. If the output buffer was too small then
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* last error will be OUTPUT_BUFFER_TOO_SMALL. */
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std::size_t sha256(
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std::uint8_t const * input, std::size_t input_length,
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std::uint8_t * output, std::size_t output_length
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);
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/** Verify a ed25519 signature. Returns std::size_t(0) on success. Returns
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* std::size_t(-1) on failure or if the signature was invalid. On failure
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* last_error will be set with an error code. If the signature was too short
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* or was not a valid signature then last_error will be BAD_MESSAGE_MAC. */
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std::size_t ed25519_verify(
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_olm_ed25519_public_key const & key,
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std::uint8_t const * message, std::size_t message_length,
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std::uint8_t const * signature, std::size_t signature_length
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);
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};
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} // namespace olm
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#endif /* UTILITY_HH_ */
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