180 lines
7.2 KiB
C
180 lines
7.2 KiB
C
/*
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Copyright (c) 2013-2014 Anton Titov.
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Copyright (c) 2013-2014 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_SSL_H
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#define _PSYNC_SSL_H
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#include <mbedtls/aes.h>
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#include <mbedtls/net_sockets.h>
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#include <mbedtls/rsa.h>
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#include <mbedtls/sha1.h>
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#include <mbedtls/sha256.h>
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#include <mbedtls/sha512.h>
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#include "pcompiler.h"
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// AES256
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#define PSYNC_AES256_BLOCK_SIZE 16
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#define PSYNC_AES256_KEY_SIZE 32
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// SHA1
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#define PSYNC_SHA1_BLOCK_LEN 64
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#define PSYNC_SHA1_DIGEST_LEN 20
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#define PSYNC_SHA1_DIGEST_HEXLEN 40
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#define psync_sha1_ctx mbedtls_sha1_context
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#define psync_sha1(data, datalen, checksum) \
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mbedtls_sha1(data, datalen, checksum)
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#define psync_sha1_init(pctx) mbedtls_sha1_starts(pctx)
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#define psync_sha1_update(pctx, data, datalen) \
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mbedtls_sha1_update(pctx, (const unsigned char *)data, datalen)
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#define psync_sha1_final(checksum, pctx) mbedtls_sha1_finish(pctx, checksum)
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// SHA256
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#define PSYNC_SHA256_BLOCK_LEN 64
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#define PSYNC_SHA256_DIGEST_LEN 32
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#define PSYNC_SHA256_DIGEST_HEXLEN 64
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#define psync_sha256_ctx mbedtls_sha256_context
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#define psync_sha256(data, datalen, checksum) \
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mbedtls_sha256(data, datalen, checksum, 0)
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#define psync_sha256_init(pctx) mbedtls_sha256_starts(pctx, 0)
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#define psync_sha256_update(pctx, data, datalen) \
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mbedtls_sha256_update(pctx, (const unsigned char *)data, datalen)
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#define psync_sha256_final(checksum, pctx) mbedtls_sha256_finish(pctx, checksum)
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// SHA512
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#define PSYNC_SHA512_BLOCK_LEN 128
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#define PSYNC_SHA512_DIGEST_LEN 64
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#define PSYNC_SHA512_DIGEST_HEXLEN 128
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#define psync_sha512_ctx mbedtls_sha512_context
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#define psync_sha512(data, datalen, checksum) \
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mbedtls_sha512(data, datalen, checksum, 0)
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#define psync_sha512_init(pctx) mbedtls_sha512_starts(pctx, 0)
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#define psync_sha512_update(pctx, data, datalen) \
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mbedtls_sha512_update(pctx, (const unsigned char *)data, datalen)
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#define psync_sha512_final(checksum, pctx) mbedtls_sha512_finish(pctx, checksum)
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// externs
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extern PSYNC_THREAD int psync_ssl_errno;
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#define PAES_INVALID_ENCODER NULL
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#define PRSA_INVALID NULL
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#define PRSA_INVALID_BIN_KEY NULL
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#define PSSL_ERR_UNKNOWN 3
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#define PSSL_ERR_WANT_READ 1
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#define PSSL_ERR_WANT_WRITE 2
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#define PSSL_FAIL -1
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#define PSSL_NEED_FINISH -2
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#define PSSL_SUCCESS 0
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#define PSYMKEY_INVALID NULL
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#define PSYMKEY_INVALID_ENC NULL
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typedef struct {
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mbedtls_net_context srv;
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mbedtls_ssl_context ssl;
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mbedtls_ssl_config cfg;
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int sock;
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int isbroken;
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char cachekey[];
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} pssl_connection_t;
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typedef struct {
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size_t datalen;
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unsigned char data[];
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} pssl_enc_data_t;
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typedef struct {
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size_t keylen;
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unsigned char key[];
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} pssl_symkey_t;
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typedef mbedtls_rsa_context *pssl_context_t;
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typedef mbedtls_rsa_context *pssl_rsapubkey_t;
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typedef mbedtls_rsa_context *pssl_rsaprivkey_t;
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typedef mbedtls_aes_context *pssl_encoder_t;
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typedef mbedtls_aes_context *pssl_decoder_t;
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typedef pssl_enc_data_t *pssl_enc_symkey_t;
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typedef pssl_enc_data_t *pssl_rsabinkey_t;
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typedef pssl_enc_data_t *pssl_signature_t;
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typedef void (*psync_ssl_debug_callback_t)(void *ctx, int level, const char *msg, int, const char *);
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// AES
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void paes_2blk_decode(pssl_decoder_t enc, const unsigned char *src, unsigned char *dst);
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void paes_2blk_encode(pssl_decoder_t enc, const unsigned char *src, unsigned char *dst);
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void paes_4blk_xor_decode(pssl_decoder_t enc, const unsigned char *src, unsigned char *dst, unsigned char *bxor);
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void paes_blk_decode(pssl_decoder_t enc, const unsigned char *src, unsigned char *dst);
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void paes_blk_encode(pssl_encoder_t enc, const unsigned char *src, unsigned char *dst);
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pssl_encoder_t paes_decoder_create(pssl_symkey_t *key);
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void paes_decoder_free(pssl_encoder_t aes);
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pssl_encoder_t paes_encoder_create(pssl_symkey_t *key);
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void paes_encoder_free(pssl_encoder_t aes);
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// RSA
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void prsa_binary_free(pssl_rsabinkey_t bin);
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pssl_rsabinkey_t prsa_binary_private(pssl_rsaprivkey_t rsa);
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pssl_rsabinkey_t prsa_binary_public(pssl_rsapubkey_t rsa);
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void prsa_free(pssl_context_t rsa);
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void prsa_free_private(pssl_rsaprivkey_t key);
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void prsa_free_public(pssl_rsapubkey_t key);
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pssl_context_t prsa_generate(int bits);
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pssl_rsaprivkey_t prsa_get_private(pssl_context_t rsa);
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pssl_rsapubkey_t prsa_get_public(pssl_context_t rsa);
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pssl_rsaprivkey_t prsa_load_private(const unsigned char *keydata, size_t keylen);
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pssl_rsapubkey_t prsa_load_public(const unsigned char *keydata, size_t keylen);
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pssl_signature_t prsa_signature(pssl_rsaprivkey_t rsa, const unsigned char *data);
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// SSL
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int pssl_bytes_left(pssl_connection_t *sslconn);
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void pssl_cleanup(void *ptr, size_t len);
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int pssl_close(pssl_connection_t *sslconn);
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void pssl_debug_cb(psync_ssl_debug_callback_t cb, void *ctx);
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int pssl_finish(pssl_connection_t *sslconn, const char *hostname);
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void pssl_free(pssl_connection_t *sslconn);
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int pssl_init();
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void pssl_log_level(int threshold);
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int pssl_open(int sock, pssl_connection_t **sslconn, const char *hostname);
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void pssl_random(unsigned char *buf, int num);
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int pssl_read(pssl_connection_t *sslconn, void *buf, int num);
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int pssl_write(pssl_connection_t *sslconn, const void *buf, int num);
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pssl_enc_symkey_t psymkey_alloc(size_t len);
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pssl_enc_symkey_t psymkey_copy(pssl_enc_symkey_t src);
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pssl_symkey_t *psymkey_decrypt(pssl_rsaprivkey_t rsa, const unsigned char *data, size_t datalen);
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pssl_symkey_t *psymkey_decrypt_lock(pssl_rsaprivkey_t *rsa, const pssl_enc_symkey_t *enckey);
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char *psymkey_derive_passphrase(const char *username, const char *passphrase);
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pssl_enc_symkey_t psymkey_encrypt(pssl_rsapubkey_t rsa, const unsigned char *data, size_t datalen);
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void psymkey_free(pssl_symkey_t *key);
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pssl_symkey_t *psymkey_generate_passphrase(const char *password, size_t keylen, const unsigned char *salt, size_t saltlen, size_t iterations);
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#endif
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