1 /* $OpenBSD: cipher.h,v 1.52 2017/05/07 23:12:57 djm Exp $ */ 2 3 /* 4 * Author: Tatu Ylonen <ylo@cs.hut.fi> 5 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 6 * All rights reserved 7 * 8 * As far as I am concerned, the code I have written for this software 9 * can be used freely for any purpose. Any derived versions of this 10 * software must be clearly marked as such, and if the derived work is 11 * incompatible with the protocol description in the RFC file, it must be 12 * called by a name other than "ssh" or "Secure Shell". 13 * 14 * Copyright (c) 2000 Markus Friedl. All rights reserved. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 #ifndef CIPHER_H 38 #define CIPHER_H 39 40 #include <sys/types.h> 41 #include <openssl/evp.h> 42 #include "cipher-chachapoly.h" 43 #include "cipher-aesctr.h" 44 45 #define CIPHER_ENCRYPT 1 46 #define CIPHER_DECRYPT 0 47 48 struct sshcipher; 49 struct sshcipher_ctx; 50 51 const struct sshcipher *cipher_by_name(const char *); 52 const char *cipher_warning_message(const struct sshcipher_ctx *); 53 int ciphers_valid(const char *); 54 char *cipher_alg_list(char, int); 55 int cipher_init(struct sshcipher_ctx **, const struct sshcipher *, 56 const u_char *, u_int, const u_char *, u_int, int); 57 int cipher_crypt(struct sshcipher_ctx *, u_int, u_char *, const u_char *, 58 u_int, u_int, u_int); 59 int cipher_get_length(struct sshcipher_ctx *, u_int *, u_int, 60 const u_char *, u_int); 61 void cipher_free(struct sshcipher_ctx *); 62 u_int cipher_blocksize(const struct sshcipher *); 63 u_int cipher_keylen(const struct sshcipher *); 64 u_int cipher_seclen(const struct sshcipher *); 65 u_int cipher_authlen(const struct sshcipher *); 66 u_int cipher_ivlen(const struct sshcipher *); 67 u_int cipher_is_cbc(const struct sshcipher *); 68 69 u_int cipher_ctx_is_plaintext(struct sshcipher_ctx *); 70 71 int cipher_get_keyiv(struct sshcipher_ctx *, u_char *, size_t); 72 int cipher_set_keyiv(struct sshcipher_ctx *, const u_char *, size_t); 73 int cipher_get_keyiv_len(const struct sshcipher_ctx *); 74 75 #endif /* CIPHER_H */ 76