1 /* 2 * ProFTPD - mod_sftp cipher mgmt 3 * Copyright (c) 2008-2017 TJ Saunders 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA. 18 * 19 * As a special exemption, TJ Saunders and other respective copyright holders 20 * give permission to link this program with OpenSSL, and distribute the 21 * resulting executable, without including the source code for OpenSSL in the 22 * source distribution. 23 */ 24 25 #ifndef MOD_SFTP_CIPHER_H 26 #define MOD_SFTP_CIPHER_H 27 28 #include "mod_sftp.h" 29 30 int sftp_cipher_init(void); 31 int sftp_cipher_free(void); 32 33 /* Returns the cipher block size, or 8, whichever is larger. This value is 34 * used when reading in the first bytes of a packet in order to determine 35 * the packet length. See RFC4253, Section 6, "Binary Packet Protocol". 36 */ 37 size_t sftp_cipher_get_block_size(void); 38 void sftp_cipher_set_block_size(size_t); 39 40 const char *sftp_cipher_get_read_algo(void); 41 int sftp_cipher_set_read_algo(const char *); 42 int sftp_cipher_set_read_key(pool *, const EVP_MD *, const BIGNUM *, 43 const char *, uint32_t, int); 44 int sftp_cipher_read_data(pool *, unsigned char *, uint32_t, 45 unsigned char **, uint32_t *); 46 47 const char *sftp_cipher_get_write_algo(void); 48 int sftp_cipher_set_write_algo(const char *); 49 int sftp_cipher_set_write_key(pool *, const EVP_MD *, const BIGNUM *, 50 const char *, uint32_t, int); 51 int sftp_cipher_write_data(struct ssh2_packet *, unsigned char *, size_t *); 52 53 #endif /* MOD_SFTP_CIPHER_H */ 54