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Diffstat (limited to 'crypto/openssh/cipher.h')
| -rw-r--r-- | crypto/openssh/cipher.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/crypto/openssh/cipher.h b/crypto/openssh/cipher.h new file mode 100644 index 0000000..006fef9 --- /dev/null +++ b/crypto/openssh/cipher.h @@ -0,0 +1,118 @@ +/* + * Author: Tatu Ylonen <ylo@cs.hut.fi> + * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland + * All rights reserved + * + * As far as I am concerned, the code I have written for this software + * can be used freely for any purpose. Any derived versions of this + * software must be clearly marked as such, and if the derived work is + * incompatible with the protocol description in the RFC file, it must be + * called by a name other than "ssh" or "Secure Shell". + * + * Copyright (c) 2000 Markus Friedl. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* RCSID("$OpenBSD: cipher.h,v 1.22 2000/10/13 18:59:14 markus Exp $"); */ +/* $FreeBSD$ */ + +#ifndef CIPHER_H +#define CIPHER_H + +#include <openssl/des.h> +#include <openssl/blowfish.h> +#include <openssl/rc4.h> +#include <openssl/cast.h> +#include "rijndael.h" +/* + * Cipher types for SSH-1. New types can be added, but old types should not + * be removed for compatibility. The maximum allowed value is 31. + */ +#define SSH_CIPHER_SSH2 -3 +#define SSH_CIPHER_ILLEGAL -2 /* No valid cipher selected. */ +#define SSH_CIPHER_NOT_SET -1 /* None selected (invalid number). */ +#define SSH_CIPHER_NONE 0 /* no encryption */ +#define SSH_CIPHER_IDEA 1 /* IDEA CFB */ +#define SSH_CIPHER_DES 2 /* DES CBC */ +#define SSH_CIPHER_3DES 3 /* 3DES CBC */ +#define SSH_CIPHER_BROKEN_TSS 4 /* TRI's Simple Stream encryption CBC */ +#define SSH_CIPHER_BROKEN_RC4 5 /* Alleged RC4 */ +#define SSH_CIPHER_BLOWFISH 6 +#define SSH_CIPHER_RESERVED 7 +#define SSH_CIPHER_MAX 31 + +typedef struct Cipher Cipher; +typedef struct CipherContext CipherContext; + +struct CipherContext { + union { + struct { + des_key_schedule key; + des_cblock iv; + } des; + struct { + des_key_schedule key1; + des_key_schedule key2; + des_cblock iv2; + des_key_schedule key3; + des_cblock iv3; + } des3; + struct { + struct bf_key_st key; + u_char iv[8]; + } bf; + struct { + CAST_KEY key; + u_char iv[8]; + } cast; + struct { + u4byte iv[4]; + rijndael_ctx enc; + rijndael_ctx dec; + } rijndael; + RC4_KEY rc4; + } u; + Cipher *cipher; +}; +struct Cipher { + char *name; + int number; /* for ssh1 only */ + u_int block_size; + u_int key_len; + void (*setkey)(CipherContext *, const u_char *, u_int); + void (*setiv)(CipherContext *, const u_char *, u_int); + void (*encrypt)(CipherContext *, u_char *, const u_char *, u_int); + void (*decrypt)(CipherContext *, u_char *, const u_char *, u_int); +}; + +unsigned int cipher_mask_ssh1(int client); +Cipher *cipher_by_name(const char *name); +Cipher *cipher_by_number(int id); +int cipher_number(const char *name); +char *cipher_name(int id); +int ciphers_valid(const char *names); +void cipher_init(CipherContext *, Cipher *, const u_char *, u_int, const u_char *, u_int); +void cipher_encrypt(CipherContext *context, u_char *dest, const u_char *src, u_int len); +void cipher_decrypt(CipherContext *context, u_char *dest, const u_char *src, u_int len); +void cipher_set_key_string(CipherContext *context, Cipher *cipher, const char *passphrase); + +#endif /* CIPHER_H */ |
