mirror of https://git.matrix.org/git/olm.git
70 lines
1.8 KiB
C++
70 lines
1.8 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 OLM_CRYPTO_HH_
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#define OLM_CRYPTO_HH_
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#include <cstdint>
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#include <cstddef>
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// eventually all of this needs to move into crypto.h, and everything should
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// use that. For now, include crypto.h here.
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#include "olm/crypto.h"
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namespace olm {
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struct Aes256Key {
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std::uint8_t key[AES256_KEY_LENGTH];
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};
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struct Aes256Iv {
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std::uint8_t iv[AES256_IV_LENGTH];
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};
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/** The length of output the aes_encrypt_cbc function will write */
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std::size_t aes_encrypt_cbc_length(
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std::size_t input_length
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);
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/** Encrypts the input using AES256 in CBC mode with PKCS#7 padding.
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* The output buffer must be big enough to hold the output including padding */
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void aes_encrypt_cbc(
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Aes256Key const & key,
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Aes256Iv const & iv,
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std::uint8_t const * input, std::size_t input_length,
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std::uint8_t * output
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);
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/** Decrypts the input using AES256 in CBC mode. The output buffer must be at
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* least the same size as the input buffer. Returns the length of the plaintext
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* without padding on success or std::size_t(-1) if the padding is invalid.
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*/
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std::size_t aes_decrypt_cbc(
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Aes256Key const & key,
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Aes256Iv const & iv,
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std::uint8_t const * input, std::size_t input_length,
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std::uint8_t * output
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);
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} // namespace olm
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#endif /* OLM_CRYPTO_HH_ */
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