122 lines
5.0 KiB
C
122 lines
5.0 KiB
C
/*
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Copyright (c) 2014 Anton Titov.
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Copyright (c) 2014 pCloud Ltd. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met: Redistributions of source code must retain the above
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copyright notice, this list of conditions and the following
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disclaimer. Redistributions in binary form must reproduce the
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above copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials provided
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with the distribution. Neither the name of pCloud Ltd nor the
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names of its contributors may be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL pCloud
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Ltd BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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DAMAGE.
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*/
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#ifndef _PSYNC_CRYPTO_H
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#define _PSYNC_CRYPTO_H
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#include "pssl.h"
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#define PSYNC_CRYPTO_AUTH_SIZE (PSYNC_AES256_BLOCK_SIZE * 2)
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#define PSYNC_CRYPTO_MAX_HASH_TREE_LEVEL 6
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typedef struct {
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uint64_t masterauthoff;
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uint64_t plainsize;
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uint64_t lastauthsectoroff[PSYNC_CRYPTO_MAX_HASH_TREE_LEVEL];
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uint16_t lastauthsectorlen[PSYNC_CRYPTO_MAX_HASH_TREE_LEVEL];
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uint8_t treelevels;
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uint8_t needmasterauth;
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} psync_crypto_offsets_t;
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typedef unsigned char psync_crypto_sector_auth_t[PSYNC_CRYPTO_AUTH_SIZE];
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typedef struct {
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psync_aes256_encoder encoder;
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union {
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long unsigned __aligner;
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unsigned char iv[PSYNC_AES256_BLOCK_SIZE];
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};
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} psync_crypto_aes256_key_struct_t, *psync_crypto_aes256_ctr_encoder_decoder_t;
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typedef struct {
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psync_aes256_encoder encoder;
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unsigned long ivlen;
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unsigned char iv[];
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} psync_crypto_aes256_key_var_iv_struct_t, *psync_crypto_aes256_text_encoder_t,
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*psync_crypto_aes256_text_decoder_t;
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typedef struct {
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psync_aes256_encoder encoder;
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psync_aes256_decoder decoder;
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unsigned long ivlen;
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unsigned char iv[];
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} psync_crypto_aes256_enc_dec_var_iv_struct_t,
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*psync_crypto_aes256_sector_encoder_decoder_t;
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#define psync_crypto_aes256_text_gen_key psync_crypto_aes256_ctr_gen_key
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#define psync_crypto_aes256_sector_gen_key psync_crypto_aes256_ctr_gen_key
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#define PSYNC_CRYPTO_INVALID_ENCODER NULL
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#define PSYNC_CRYPTO_INVALID_REVISIONID ((uint32_t)-1)
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psync_symmetric_key_t psync_crypto_aes256_gen_key_len(size_t len);
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psync_symmetric_key_t psync_crypto_aes256_ctr_gen_key();
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psync_crypto_aes256_ctr_encoder_decoder_t
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psync_crypto_aes256_ctr_encoder_decoder_create(psync_symmetric_key_t key);
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void psync_crypto_aes256_ctr_encoder_decoder_free(
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psync_crypto_aes256_ctr_encoder_decoder_t enc);
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void psync_crypto_aes256_ctr_encode_decode_inplace(
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psync_crypto_aes256_ctr_encoder_decoder_t enc, void *data, size_t datalen,
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uint64_t dataoffset);
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psync_crypto_aes256_text_encoder_t
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psync_crypto_aes256_text_encoder_create(psync_symmetric_key_t key);
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void psync_crypto_aes256_text_encoder_free(
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psync_crypto_aes256_text_encoder_t enc);
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psync_crypto_aes256_text_decoder_t
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psync_crypto_aes256_text_decoder_create(psync_symmetric_key_t key);
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void psync_crypto_aes256_text_decoder_free(
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psync_crypto_aes256_text_decoder_t enc);
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void psync_crypto_aes256_encode_text(psync_crypto_aes256_text_encoder_t enc,
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const unsigned char *txt, size_t txtlen,
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unsigned char **out, size_t *outlen);
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unsigned char *
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psync_crypto_aes256_decode_text(psync_crypto_aes256_text_decoder_t enc,
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const unsigned char *data, size_t datalen);
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psync_crypto_aes256_sector_encoder_decoder_t
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psync_crypto_aes256_sector_encoder_decoder_create(psync_symmetric_key_t key);
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void psync_crypto_aes256_sector_encoder_decoder_free(
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psync_crypto_aes256_sector_encoder_decoder_t enc);
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void psync_crypto_aes256_encode_sector(
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psync_crypto_aes256_sector_encoder_decoder_t enc, const unsigned char *data,
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size_t datalen, unsigned char *out, psync_crypto_sector_auth_t authout,
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uint64_t sectorid);
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int psync_crypto_aes256_decode_sector(
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psync_crypto_aes256_sector_encoder_decoder_t enc, const unsigned char *data,
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size_t datalen, unsigned char *out, const psync_crypto_sector_auth_t auth,
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uint64_t sectorid);
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void psync_crypto_sign_auth_sector(
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psync_crypto_aes256_sector_encoder_decoder_t enc, const unsigned char *data,
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size_t datalen, psync_crypto_sector_auth_t authout);
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#endif
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