Mercurial > dropbear
view algo.h @ 1151:a550e1e2e2a9
make sure that the test for queued packets to write occurs after
those packets might have been enqueued by set_connect_fds()
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Tue, 29 Sep 2015 21:53:27 +0800 |
parents | 2052b53d3034 |
children | 56aba7dedbea |
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/* * Dropbear - a SSH2 server * * Copyright (c) 2002,2003 Matt Johnston * All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef DROPBEAR_ALGO_H_ #define DROPBEAR_ALGO_H_ #include "includes.h" #include "buffer.h" #define DROPBEAR_MODE_UNUSED 0 #define DROPBEAR_MODE_CBC 1 #define DROPBEAR_MODE_CTR 2 struct Algo_Type { const char *name; /* identifying name */ char val; /* a value for this cipher, or -1 for invalid */ const void *data; /* algorithm specific data */ char usable; /* whether we can use this algorithm */ const void *mode; /* the mode, currently only used for ciphers, points to a 'struct dropbear_cipher_mode' */ }; typedef struct Algo_Type algo_type; /* lists mapping ssh types of algorithms to internal values */ extern algo_type sshkex[]; extern algo_type sshhostkey[]; extern algo_type sshciphers[]; extern algo_type sshhashes[]; extern algo_type ssh_compress[]; extern algo_type ssh_delaycompress[]; extern algo_type ssh_nocompress[]; extern const struct dropbear_cipher dropbear_nocipher; extern const struct dropbear_cipher_mode dropbear_mode_none; extern const struct dropbear_hash dropbear_nohash; struct dropbear_cipher { const struct ltc_cipher_descriptor *cipherdesc; const unsigned long keysize; const unsigned char blocksize; }; struct dropbear_cipher_mode { int (*start)(int cipher, const unsigned char *IV, const unsigned char *key, int keylen, int num_rounds, void *cipher_state); int (*encrypt)(const unsigned char *pt, unsigned char *ct, unsigned long len, void *cipher_state); int (*decrypt)(const unsigned char *ct, unsigned char *pt, unsigned long len, void *cipher_state); }; struct dropbear_hash { const struct ltc_hash_descriptor *hash_desc; const unsigned long keysize; /* hashsize may be truncated from the size returned by hash_desc, eg sha1-96 */ const unsigned char hashsize; }; enum dropbear_kex_mode { DROPBEAR_KEX_NORMAL_DH, DROPBEAR_KEX_ECDH, DROPBEAR_KEX_CURVE25519, }; struct dropbear_kex { enum dropbear_kex_mode mode; /* "normal" DH KEX */ const unsigned char *dh_p_bytes; const int dh_p_len; /* elliptic curve DH KEX */ #ifdef DROPBEAR_ECDH const struct dropbear_ecc_curve *ecc_curve; #else const void* dummy; #endif /* both */ const struct ltc_hash_descriptor *hash_desc; }; int have_algo(char* algo, size_t algolen, algo_type algos[]); void buf_put_algolist(buffer * buf, algo_type localalgos[]); enum kexguess2_used { KEXGUESS2_LOOK, KEXGUESS2_NO, KEXGUESS2_YES, }; #define KEXGUESS2_ALGO_NAME "[email protected]" #define KEXGUESS2_ALGO_ID 99 algo_type * buf_match_algo(buffer* buf, algo_type localalgos[], enum kexguess2_used *kexguess2, int *goodguess); #ifdef ENABLE_USER_ALGO_LIST int check_user_algos(const char* user_algo_list, algo_type * algos, const char *algo_desc); char * algolist_string(algo_type algos[]); #endif enum { DROPBEAR_COMP_NONE, DROPBEAR_COMP_ZLIB, DROPBEAR_COMP_ZLIB_DELAY, }; #endif /* DROPBEAR_ALGO_H_ */