1 /* $OpenBSD: cipher.h,v 1.48 2015/07/08 19:09:25 markus Exp $ */ 2 3 /* 4 * Author: Tatu Ylonen <ylo (at) cs.hut.fi> 5 * Copyright (c) 1995 Tatu Ylonen <ylo (at) 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 /* 46 * Cipher types for SSH-1. New types can be added, but old types should not 47 * be removed for compatibility. The maximum allowed value is 31. 48 */ 49 #define SSH_CIPHER_SSH2 -3 50 #define SSH_CIPHER_INVALID -2 /* No valid cipher selected. */ 51 #define SSH_CIPHER_NOT_SET -1 /* None selected (invalid number). */ 52 #define SSH_CIPHER_NONE 0 /* no encryption */ 53 #define SSH_CIPHER_IDEA 1 /* IDEA CFB */ 54 #define SSH_CIPHER_DES 2 /* DES CBC */ 55 #define SSH_CIPHER_3DES 3 /* 3DES CBC */ 56 #define SSH_CIPHER_BROKEN_TSS 4 /* TRI's Simple Stream encryption CBC */ 57 #define SSH_CIPHER_BROKEN_RC4 5 /* Alleged RC4 */ 58 #define SSH_CIPHER_BLOWFISH 6 59 #define SSH_CIPHER_RESERVED 7 60 #define SSH_CIPHER_MAX 31 61 62 #define CIPHER_ENCRYPT 1 63 #define CIPHER_DECRYPT 0 64 65 struct sshcipher; 66 struct sshcipher_ctx { 67 int plaintext; 68 int encrypt; 69 EVP_CIPHER_CTX evp; 70 struct chachapoly_ctx cp_ctx; /* XXX union with evp? */ 71 struct aesctr_ctx ac_ctx; /* XXX union with evp? */ 72 const struct sshcipher *cipher; 73 }; 74 75 u_int cipher_mask_ssh1(int); 76 const struct sshcipher *cipher_by_name(const char *); 77 const struct sshcipher *cipher_by_number(int); 78 int cipher_number(const char *); 79 char *cipher_name(int); 80 const char *cipher_warning_message(const struct sshcipher_ctx *); 81 int ciphers_valid(const char *); 82 char *cipher_alg_list(char, int); 83 int cipher_init(struct sshcipher_ctx *, const struct sshcipher *, 84 const u_char *, u_int, const u_char *, u_int, int); 85 int cipher_crypt(struct sshcipher_ctx *, u_int, u_char *, const u_char *, 86 u_int, u_int, u_int); 87 int cipher_get_length(struct sshcipher_ctx *, u_int *, u_int, 88 const u_char *, u_int); 89 int cipher_cleanup(struct sshcipher_ctx *); 90 int cipher_set_key_string(struct sshcipher_ctx *, const struct sshcipher *, 91 const char *, int); 92 u_int cipher_blocksize(const struct sshcipher *); 93 u_int cipher_keylen(const struct sshcipher *); 94 u_int cipher_seclen(const struct sshcipher *); 95 u_int cipher_authlen(const struct sshcipher *); 96 u_int cipher_ivlen(const struct sshcipher *); 97 u_int cipher_is_cbc(const struct sshcipher *); 98 99 u_int cipher_get_number(const struct sshcipher *); 100 int cipher_get_keyiv(struct sshcipher_ctx *, u_char *, u_int); 101 int cipher_set_keyiv(struct sshcipher_ctx *, const u_char *); 102 int cipher_get_keyiv_len(const struct sshcipher_ctx *); 103 int cipher_get_keycontext(const struct sshcipher_ctx *, u_char *); 104 void cipher_set_keycontext(struct sshcipher_ctx *, const u_char *); 105 #endif /* CIPHER_H */ 106
