104 lines
4.2 KiB
C
104 lines
4.2 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 pcrypto_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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} pcrypto_key_t;
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typedef pcrypto_key_t *pcrypto_ctr_encdec_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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} pcrypto_key_iv_t;
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typedef pcrypto_key_iv_t *pcrypto_textenc_t;
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typedef pcrypto_key_iv_t *pcrypto_textdec_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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} pcrypto_encdec_iv_t;
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typedef pcrypto_encdec_iv_t *pcrypto_sector_encdec_t;
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#define pcrypto_text_gen_key pcrypto_ctr_gen_key
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#define pcrypto_sector_gen_key pcrypto_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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pcrypto_ctr_encdec_t pcrypto_ctr_encdec_create(psync_symmetric_key_t key);
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void pcrypto_ctr_encdec_decode(pcrypto_ctr_encdec_t enc, void *data, size_t datalen, uint64_t dataoffset);
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void pcrypto_ctr_encdec_free(pcrypto_ctr_encdec_t enc);
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int pcrypto_decode_sec(pcrypto_sector_encdec_t enc, const unsigned char *data, size_t datalen, unsigned char *out, const pcrypto_sector_auth_t auth, uint64_t sectorid);
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unsigned char * pcrypto_decode_text(pcrypto_textdec_t enc, const unsigned char *data, size_t datalen);
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void pcrypto_encode_sec(pcrypto_sector_encdec_t enc, const unsigned char *data, size_t datalen, unsigned char *out, pcrypto_sector_auth_t authout, uint64_t sectorid);
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void pcrypto_encode_text(pcrypto_textenc_t enc, const unsigned char *txt, size_t txtlen, unsigned char **out, size_t *outlen);
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psync_symmetric_key_t pcrypto_key();
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psync_symmetric_key_t pcrypto_key_len(size_t len);
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pcrypto_sector_encdec_t pcrypto_sec_encdec_create(psync_symmetric_key_t key);
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void pcrypto_sec_encdec_free(pcrypto_sector_encdec_t enc);
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void pcrypto_sign_sec(pcrypto_sector_encdec_t enc, const unsigned char *data, size_t datalen, pcrypto_sector_auth_t authout);
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pcrypto_textdec_t pcrypto_textdec_create(psync_symmetric_key_t key);
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void pcrypto_textdec_free(pcrypto_textdec_t enc);
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pcrypto_textenc_t pcrypto_textenc_create(psync_symmetric_key_t key);
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void pcrypto_textenc_free(pcrypto_textenc_t enc);
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#endif
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