1 /* $NetBSD: cipher.h,v 1.8 2015/08/13 10:33:21 christos Exp $ */ 2 /* $OpenBSD: cipher.h,v 1.48 2015/07/08 19:09:25 markus 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 #include <openssl/evp.h> 43 #include "cipher-chachapoly.h" 44 #include "cipher-aesctr.h" 45 46 /* 47 * Cipher types for SSH-1. New types can be added, but old types should not 48 * be removed for compatibility. The maximum allowed value is 31. 49 */ 50 #define SSH_CIPHER_SSH2 -3 51 #define SSH_CIPHER_INVALID -2 /* No valid cipher selected. */ 52 #define SSH_CIPHER_NOT_SET -1 /* None selected (invalid number). */ 53 #define SSH_CIPHER_NONE 0 /* no encryption */ 54 #define SSH_CIPHER_IDEA 1 /* IDEA CFB */ 55 #define SSH_CIPHER_DES 2 /* DES CBC */ 56 #define SSH_CIPHER_3DES 3 /* 3DES CBC */ 57 #define SSH_CIPHER_BROKEN_TSS 4 /* TRI's Simple Stream encryption CBC */ 58 #define SSH_CIPHER_BROKEN_RC4 5 /* Alleged RC4 */ 59 #define SSH_CIPHER_BLOWFISH 6 60 #define SSH_CIPHER_RESERVED 7 61 #define SSH_CIPHER_MAX 31 62 63 #define CIPHER_ENCRYPT 1 64 #define CIPHER_DECRYPT 0 65 66 struct sshcipher; 67 struct sshcipher_ctx { 68 int plaintext; 69 int encrypt; 70 EVP_CIPHER_CTX evp; 71 struct chachapoly_ctx cp_ctx; /* XXX union with evp? */ 72 struct aesctr_ctx ac_ctx; /* XXX union with evp? */ 73 const struct sshcipher *cipher; 74 }; 75 76 u_int cipher_mask_ssh1(int); 77 const struct sshcipher *cipher_by_name(const char *); 78 const struct sshcipher *cipher_by_number(int); 79 int cipher_number(const char *); 80 const char *cipher_name(int); 81 const char *cipher_warning_message(const struct sshcipher_ctx *); 82 int ciphers_valid(const char *); 83 char *cipher_alg_list(char, int); 84 int cipher_init(struct sshcipher_ctx *, const struct sshcipher *, 85 const u_char *, u_int, const u_char *, u_int, int); 86 int cipher_crypt(struct sshcipher_ctx *, u_int, u_char *, const u_char *, 87 u_int, u_int, u_int); 88 int cipher_get_length(struct sshcipher_ctx *, u_int *, u_int, 89 const u_char *, u_int); 90 int cipher_cleanup(struct sshcipher_ctx *); 91 int cipher_set_key_string(struct sshcipher_ctx *, const struct sshcipher *, 92 const char *, int); 93 u_int cipher_blocksize(const struct sshcipher *); 94 u_int cipher_keylen(const struct sshcipher *); 95 u_int cipher_seclen(const struct sshcipher *); 96 u_int cipher_authlen(const struct sshcipher *); 97 u_int cipher_ivlen(const struct sshcipher *); 98 u_int cipher_is_cbc(const struct sshcipher *); 99 100 u_int cipher_get_number(const struct sshcipher *); 101 int cipher_get_keyiv(struct sshcipher_ctx *, u_char *, u_int); 102 int cipher_set_keyiv(struct sshcipher_ctx *, const u_char *); 103 int cipher_get_keyiv_len(const struct sshcipher_ctx *); 104 int cipher_get_keycontext(const struct sshcipher_ctx *, u_char *); 105 void cipher_set_keycontext(struct sshcipher_ctx *, const u_char *); 106 #endif /* CIPHER_H */ 107