| /* $OpenBSD: kex.h,v 1.51 2010/09/09 10:45:45 djm Exp $ */ |
| |
| /* |
| * Copyright (c) 2000, 2001 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. |
| */ |
| #ifndef KEX_H |
| #define KEX_H |
| |
| #include <signal.h> |
| #include <openssl/evp.h> |
| #include <openssl/hmac.h> |
| #include <openssl/ec.h> |
| |
| #define KEX_COOKIE_LEN 16 |
| |
| #define KEX_DH1 "diffie-hellman-group1-sha1" |
| #define KEX_DH14 "diffie-hellman-group14-sha1" |
| #define KEX_DHGEX_SHA1 "diffie-hellman-group-exchange-sha1" |
| #define KEX_DHGEX_SHA256 "diffie-hellman-group-exchange-sha256" |
| #define KEX_RESUME "resume@appgate.com" |
| /* The following represents the family of ECDH methods */ |
| #define KEX_ECDH_SHA2_STEM "ecdh-sha2-" |
| |
| #define COMP_NONE 0 |
| #define COMP_ZLIB 1 |
| #define COMP_DELAYED 2 |
| |
| enum kex_init_proposals { |
| PROPOSAL_KEX_ALGS, |
| PROPOSAL_SERVER_HOST_KEY_ALGS, |
| PROPOSAL_ENC_ALGS_CTOS, |
| PROPOSAL_ENC_ALGS_STOC, |
| PROPOSAL_MAC_ALGS_CTOS, |
| PROPOSAL_MAC_ALGS_STOC, |
| PROPOSAL_COMP_ALGS_CTOS, |
| PROPOSAL_COMP_ALGS_STOC, |
| PROPOSAL_LANG_CTOS, |
| PROPOSAL_LANG_STOC, |
| PROPOSAL_MAX |
| }; |
| |
| enum kex_modes { |
| MODE_IN, |
| MODE_OUT, |
| MODE_MAX |
| }; |
| |
| enum kex_exchange { |
| KEX_DH_GRP1_SHA1, |
| KEX_DH_GRP14_SHA1, |
| KEX_DH_GEX_SHA1, |
| KEX_DH_GEX_SHA256, |
| KEX_ECDH_SHA2, |
| KEX_MAX |
| }; |
| |
| #define KEX_INIT_SENT 0x0001 |
| |
| typedef struct Kex Kex; |
| typedef struct Mac Mac; |
| typedef struct Comp Comp; |
| typedef struct Enc Enc; |
| typedef struct Newkeys Newkeys; |
| |
| struct Enc { |
| char *name; |
| Cipher *cipher; |
| int enabled; |
| u_int key_len; |
| u_int block_size; |
| u_char *key; |
| u_char *iv; |
| }; |
| struct Mac { |
| char *name; |
| int enabled; |
| u_int mac_len; |
| u_char *key; |
| u_int key_len; |
| int type; |
| const EVP_MD *evp_md; |
| HMAC_CTX evp_ctx; |
| struct umac_ctx *umac_ctx; |
| }; |
| struct Comp { |
| int type; |
| int enabled; |
| char *name; |
| }; |
| struct Newkeys { |
| Enc enc; |
| Mac mac; |
| Comp comp; |
| }; |
| struct Kex { |
| u_char *session_id; |
| u_int session_id_len; |
| Newkeys *newkeys[MODE_MAX]; |
| u_int we_need; |
| int server; |
| char *name; |
| int hostkey_type; |
| int kex_type; |
| int roaming; |
| Buffer my; |
| Buffer peer; |
| sig_atomic_t done; |
| int flags; |
| const EVP_MD *evp_md; |
| char *client_version_string; |
| char *server_version_string; |
| int (*verify_host_key)(Key *); |
| Key *(*load_host_public_key)(int); |
| Key *(*load_host_private_key)(int); |
| int (*host_key_index)(Key *); |
| void (*kex[KEX_MAX])(Kex *); |
| }; |
| |
| Kex *kex_setup(char *[PROPOSAL_MAX]); |
| void kex_finish(Kex *); |
| |
| void kex_send_kexinit(Kex *); |
| void kex_input_kexinit(int, u_int32_t, void *); |
| void kex_derive_keys(Kex *, u_char *, u_int, BIGNUM *); |
| |
| Newkeys *kex_get_newkeys(int); |
| |
| void kexdh_client(Kex *); |
| void kexdh_server(Kex *); |
| void kexgex_client(Kex *); |
| void kexgex_server(Kex *); |
| void kexecdh_client(Kex *); |
| void kexecdh_server(Kex *); |
| |
| void |
| kex_dh_hash(char *, char *, char *, int, char *, int, u_char *, int, |
| BIGNUM *, BIGNUM *, BIGNUM *, u_char **, u_int *); |
| void |
| kexgex_hash(const EVP_MD *, char *, char *, char *, int, char *, |
| int, u_char *, int, int, int, int, BIGNUM *, BIGNUM *, BIGNUM *, |
| BIGNUM *, BIGNUM *, u_char **, u_int *); |
| void |
| kex_ecdh_hash(const EVP_MD *, const EC_GROUP *, char *, char *, char *, int, |
| char *, int, u_char *, int, const EC_POINT *, const EC_POINT *, |
| const BIGNUM *, u_char **, u_int *); |
| |
| int kex_ecdh_name_to_nid(const char *); |
| const EVP_MD *kex_ecdh_name_to_evpmd(const char *); |
| |
| void |
| derive_ssh1_session_id(BIGNUM *, BIGNUM *, u_int8_t[8], u_int8_t[16]); |
| |
| #if defined(DEBUG_KEX) || defined(DEBUG_KEXDH) || defined(DEBUG_KEXECDH) |
| void dump_digest(char *, u_char *, int); |
| #endif |
| |
| #endif |