1 /* $NetBSD: cipher.h,v 1.15 2020/02/27 00:24:40 christos Exp $ */ 2 /* $OpenBSD: cipher.h,v 1.55 2020/01/23 10:24:29 dtucker Exp $ */ 3 4 /* 5 * Author: Tatu Ylonen <ylo@cs.hut.fi> 6 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 7 * All rights reserved 8 * 9 * As far as I am concerned, the code I have written for this software 10 * can be used freely for any purpose. Any derived versions of this 11 * software must be clearly marked as such, and if the derived work is 12 * incompatible with the protocol description in the RFC file, it must be 13 * called by a name other than "ssh" or "Secure Shell". 14 * 15 * Copyright (c) 2000 Markus Friedl. All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions 19 * are met: 20 * 1. Redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer. 22 * 2. Redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 27 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 28 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 30 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 31 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 35 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #ifndef CIPHER_H 39 #define CIPHER_H 40 41 #include <sys/types.h> 42 #ifdef WITH_OPENSSL 43 #include <openssl/evp.h> 44 #endif 45 #include "cipher-chachapoly.h" 46 #include "cipher-aesctr.h" 47 48 #define CIPHER_ENCRYPT 1 49 #define CIPHER_DECRYPT 0 50 51 struct sshcipher; 52 #if 0 53 struct sshcipher_ctx { 54 int plaintext; 55 int encrypt; 56 EVP_CIPHER_CTX *evp; 57 struct chachapoly_ctx cp_ctx; /* XXX union with evp? */ 58 struct aesctr_ctx ac_ctx; /* XXX union with evp? */ 59 const struct sshcipher *cipher; 60 }; 61 #else 62 struct sshcipher_ctx; 63 #endif 64 65 const struct sshcipher *cipher_by_name(const char *); 66 const char *cipher_warning_message(const struct sshcipher_ctx *); 67 int ciphers_valid(const char *); 68 char *cipher_alg_list(char, int); 69 const char *compression_alg_list(int); 70 int cipher_init(struct sshcipher_ctx **, const struct sshcipher *, 71 const u_char *, u_int, const u_char *, u_int, int); 72 int cipher_crypt(struct sshcipher_ctx *, u_int, u_char *, const u_char *, 73 u_int, u_int, u_int); 74 int cipher_get_length(struct sshcipher_ctx *, u_int *, u_int, 75 const u_char *, u_int); 76 void cipher_free(struct sshcipher_ctx *); 77 u_int cipher_blocksize(const struct sshcipher *); 78 u_int cipher_keylen(const struct sshcipher *); 79 u_int cipher_seclen(const struct sshcipher *); 80 u_int cipher_authlen(const struct sshcipher *); 81 u_int cipher_ivlen(const struct sshcipher *); 82 u_int cipher_is_cbc(const struct sshcipher *); 83 84 u_int cipher_ctx_is_plaintext(struct sshcipher_ctx *); 85 86 int cipher_get_keyiv(struct sshcipher_ctx *, u_char *, size_t); 87 int cipher_set_keyiv(struct sshcipher_ctx *, const u_char *, size_t); 88 int cipher_get_keyiv_len(const struct sshcipher_ctx *); 89 90 #endif /* CIPHER_H */ 91