d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
9faa27f263
freebsd-dev/crypto/openssh/sshkey.h
Ed Maste f374ba41f5 ssh: update to OpenSSH 9.2p1 
Release notes are available at https://www.openssh.com/txt/release-9.2

OpenSSH 9.2 contains fixes for two security problems and a memory safety
problem.  The memory safety problem is not believed to be exploitable.
These fixes have already been committed to OpenSSH 9.1 in FreeBSD.

Some other notable items from the release notes:

 * ssh(1): add a new EnableEscapeCommandline ssh_config(5) option that
   controls whether the client-side ~C escape sequence that provides a
   command-line is available. Among other things, the ~C command-line
   could be used to add additional port-forwards at runtime.

 * sshd(8): add support for channel inactivity timeouts via a new
   sshd_config(5) ChannelTimeout directive. This allows channels that
   have not seen traffic in a configurable interval to be
   automatically closed. Different timeouts may be applied to session,
   X11, agent and TCP forwarding channels.

 * sshd(8): add a sshd_config UnusedConnectionTimeout option to
   terminate client connections that have no open channels for a
   length of time. This complements the ChannelTimeout option above.
    
 * sshd(8): add a -V (version) option to sshd like the ssh client has.

 * scp(1), sftp(1): add a -X option to both scp(1) and sftp(1) to
   allow control over some SFTP protocol parameters: the copy buffer
   length and the number of in-flight requests, both of which are used
   during upload/download. Previously these could be controlled in
   sftp(1) only. This makes them available in both SFTP protocol
   clients using the same option character sequence.
    
 * ssh-keyscan(1): allow scanning of complete CIDR address ranges,
   e.g.  "ssh-keyscan 192.168.0.0/24". If a CIDR range is passed, then
   it will be expanded to all possible addresses in the range
   including the all-0s and all-1s addresses. bz#976

 * ssh(1): support dynamic remote port forwarding in escape
   command-line's -R processing. bz#3499

MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
2023-02-06 16:54:56 -05:00

352 lines
12 KiB
C
Raw Blame History

/* $OpenBSD: sshkey.h,v 1.61 2022/10/28 00:44:44 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 SSHKEY_H
#define SSHKEY_H
#include <sys/types.h>
#ifdef WITH_OPENSSL
#include <openssl/rsa.h>
#include <openssl/dsa.h>
# ifdef OPENSSL_HAS_ECC
# include <openssl/ec.h>
# include <openssl/ecdsa.h>
# else /* OPENSSL_HAS_ECC */
# define EC_KEY void
# define EC_GROUP void
# define EC_POINT void
# endif /* OPENSSL_HAS_ECC */
#define SSH_OPENSSL_VERSION OpenSSL_version(OPENSSL_VERSION)
#else /* WITH_OPENSSL */
# define BIGNUM void
# define RSA void
# define DSA void
# define EC_KEY void
# define EC_GROUP void
# define EC_POINT void
#define SSH_OPENSSL_VERSION "without OpenSSL"
#endif /* WITH_OPENSSL */
#define SSH_RSA_MINIMUM_MODULUS_SIZE 1024
#define SSH_KEY_MAX_SIGN_DATA_SIZE (1 << 20)
struct sshbuf;
/* Key types */
enum sshkey_types {
KEY_RSA,
KEY_DSA,
KEY_ECDSA,
KEY_ED25519,
KEY_RSA_CERT,
KEY_DSA_CERT,
KEY_ECDSA_CERT,
KEY_ED25519_CERT,
KEY_XMSS,
KEY_XMSS_CERT,
KEY_ECDSA_SK,
KEY_ECDSA_SK_CERT,
KEY_ED25519_SK,
KEY_ED25519_SK_CERT,
KEY_UNSPEC
};
/* Default fingerprint hash */
#define SSH_FP_HASH_DEFAULT SSH_DIGEST_SHA256
/* Fingerprint representation formats */
enum sshkey_fp_rep {
SSH_FP_DEFAULT = 0,
SSH_FP_HEX,
SSH_FP_BASE64,
SSH_FP_BUBBLEBABBLE,
SSH_FP_RANDOMART
};
/* Private key serialisation formats, used on the wire */
enum sshkey_serialize_rep {
SSHKEY_SERIALIZE_DEFAULT = 0,
SSHKEY_SERIALIZE_STATE = 1, /* only state is serialized */
SSHKEY_SERIALIZE_FULL = 2, /* include keys for saving to disk */
SSHKEY_SERIALIZE_SHIELD = 3, /* everything, for encrypting in ram */
SSHKEY_SERIALIZE_INFO = 254, /* minimal information */
};
/* Private key disk formats */
enum sshkey_private_format {
SSHKEY_PRIVATE_OPENSSH = 0,
SSHKEY_PRIVATE_PEM = 1,
SSHKEY_PRIVATE_PKCS8 = 2,
};
/* key is stored in external hardware */
#define SSHKEY_FLAG_EXT 0x0001
#define SSHKEY_CERT_MAX_PRINCIPALS 256
/* XXX opaquify? */
struct sshkey_cert {
struct sshbuf *certblob; /* Kept around for use on wire */
u_int type; /* SSH2_CERT_TYPE_USER or SSH2_CERT_TYPE_HOST */
u_int64_t serial;
char *key_id;
u_int nprincipals;
char **principals;
u_int64_t valid_after, valid_before;
struct sshbuf *critical;
struct sshbuf *extensions;
struct sshkey *signature_key;
char *signature_type;
};
/* XXX opaquify? */
struct sshkey {
int type;
int flags;
/* KEY_RSA */
RSA *rsa;
/* KEY_DSA */
DSA *dsa;
/* KEY_ECDSA and KEY_ECDSA_SK */
int ecdsa_nid; /* NID of curve */
EC_KEY *ecdsa;
/* KEY_ED25519 and KEY_ED25519_SK */
u_char *ed25519_sk;
u_char *ed25519_pk;
/* KEY_XMSS */
char *xmss_name;
char *xmss_filename; /* for state file updates */
void *xmss_state; /* depends on xmss_name, opaque */
u_char *xmss_sk;
u_char *xmss_pk;
/* KEY_ECDSA_SK and KEY_ED25519_SK */
char *sk_application;
uint8_t sk_flags;
struct sshbuf *sk_key_handle;
struct sshbuf *sk_reserved;
/* Certificates */
struct sshkey_cert *cert;
/* Private key shielding */
u_char *shielded_private;
size_t shielded_len;
u_char *shield_prekey;
size_t shield_prekey_len;
};
#define ED25519_SK_SZ crypto_sign_ed25519_SECRETKEYBYTES
#define ED25519_PK_SZ crypto_sign_ed25519_PUBLICKEYBYTES
/* Additional fields contained in signature */
struct sshkey_sig_details {
uint32_t sk_counter; /* U2F signature counter */
uint8_t sk_flags; /* U2F signature flags; see ssh-sk.h */
};
struct sshkey_impl_funcs {
u_int (*size)(const struct sshkey *); /* optional */
int (*alloc)(struct sshkey *); /* optional */
void (*cleanup)(struct sshkey *); /* optional */
int (*equal)(const struct sshkey *, const struct sshkey *);
int (*serialize_public)(const struct sshkey *, struct sshbuf *,
enum sshkey_serialize_rep);
int (*deserialize_public)(const char *, struct sshbuf *,
struct sshkey *);
int (*serialize_private)(const struct sshkey *, struct sshbuf *,
enum sshkey_serialize_rep);
int (*deserialize_private)(const char *, struct sshbuf *,
struct sshkey *);
int (*generate)(struct sshkey *, int); /* optional */
int (*copy_public)(const struct sshkey *, struct sshkey *);
int (*sign)(struct sshkey *, u_char **, size_t *,
const u_char *, size_t, const char *,
const char *, const char *, u_int); /* optional */
int (*verify)(const struct sshkey *, const u_char *, size_t,
const u_char *, size_t, const char *, u_int,
struct sshkey_sig_details **);
};
struct sshkey_impl {
const char *name;
const char *shortname;
const char *sigalg;
int type;
int nid;
int cert;
int sigonly;
int keybits;
const struct sshkey_impl_funcs *funcs;
};
struct sshkey *sshkey_new(int);
void sshkey_free(struct sshkey *);
int sshkey_equal_public(const struct sshkey *,
const struct sshkey *);
int sshkey_equal(const struct sshkey *, const struct sshkey *);
char *sshkey_fingerprint(const struct sshkey *,
int, enum sshkey_fp_rep);
int sshkey_fingerprint_raw(const struct sshkey *k,
int, u_char **retp, size_t *lenp);
const char *sshkey_type(const struct sshkey *);
const char *sshkey_cert_type(const struct sshkey *);
int sshkey_format_text(const struct sshkey *, struct sshbuf *);
int sshkey_write(const struct sshkey *, FILE *);
int sshkey_read(struct sshkey *, char **);
u_int sshkey_size(const struct sshkey *);
int sshkey_generate(int type, u_int bits, struct sshkey **keyp);
int sshkey_from_private(const struct sshkey *, struct sshkey **);
int sshkey_is_shielded(struct sshkey *);
int sshkey_shield_private(struct sshkey *);
int sshkey_unshield_private(struct sshkey *);
int sshkey_type_from_name(const char *);
int sshkey_is_cert(const struct sshkey *);
int sshkey_is_sk(const struct sshkey *);
int sshkey_type_is_cert(int);
int sshkey_type_plain(int);
/* Returns non-zero if key name match sigalgs pattern list. (handles RSA) */
int sshkey_match_keyname_to_sigalgs(const char *, const char *);
int sshkey_to_certified(struct sshkey *);
int sshkey_drop_cert(struct sshkey *);
int sshkey_cert_copy(const struct sshkey *, struct sshkey *);
int sshkey_cert_check_authority(const struct sshkey *, int, int, int,
uint64_t, const char *, const char **);
int sshkey_cert_check_authority_now(const struct sshkey *, int, int, int,
const char *, const char **);
int sshkey_cert_check_host(const struct sshkey *, const char *,
int , const char *, const char **);
size_t sshkey_format_cert_validity(const struct sshkey_cert *,
char *, size_t) __attribute__((__bounded__(__string__, 2, 3)));
int sshkey_check_cert_sigtype(const struct sshkey *, const char *);
int sshkey_certify(struct sshkey *, struct sshkey *,
const char *, const char *, const char *);
/* Variant allowing use of a custom signature function (e.g. for ssh-agent) */
typedef int sshkey_certify_signer(struct sshkey *, u_char **, size_t *,
const u_char *, size_t, const char *, const char *, const char *,
u_int, void *);
int sshkey_certify_custom(struct sshkey *, struct sshkey *, const char *,
const char *, const char *, sshkey_certify_signer *, void *);
int sshkey_ecdsa_nid_from_name(const char *);
int sshkey_curve_name_to_nid(const char *);
const char * sshkey_curve_nid_to_name(int);
u_int sshkey_curve_nid_to_bits(int);
int sshkey_ecdsa_bits_to_nid(int);
int sshkey_ecdsa_key_to_nid(EC_KEY *);
int sshkey_ec_nid_to_hash_alg(int nid);
int sshkey_ec_validate_public(const EC_GROUP *, const EC_POINT *);
int sshkey_ec_validate_private(const EC_KEY *);
const char *sshkey_ssh_name(const struct sshkey *);
const char *sshkey_ssh_name_plain(const struct sshkey *);
int sshkey_names_valid2(const char *, int);
char *sshkey_alg_list(int, int, int, char);
int sshkey_from_blob(const u_char *, size_t, struct sshkey **);
int sshkey_fromb(struct sshbuf *, struct sshkey **);
int sshkey_froms(struct sshbuf *, struct sshkey **);
int sshkey_to_blob(const struct sshkey *, u_char **, size_t *);
int sshkey_to_base64(const struct sshkey *, char **);
int sshkey_putb(const struct sshkey *, struct sshbuf *);
int sshkey_puts(const struct sshkey *, struct sshbuf *);
int sshkey_puts_opts(const struct sshkey *, struct sshbuf *,
enum sshkey_serialize_rep);
int sshkey_plain_to_blob(const struct sshkey *, u_char **, size_t *);
int sshkey_putb_plain(const struct sshkey *, struct sshbuf *);
int sshkey_sign(struct sshkey *, u_char **, size_t *,
const u_char *, size_t, const char *, const char *, const char *, u_int);
int sshkey_verify(const struct sshkey *, const u_char *, size_t,
const u_char *, size_t, const char *, u_int, struct sshkey_sig_details **);
int sshkey_check_sigtype(const u_char *, size_t, const char *);
const char *sshkey_sigalg_by_name(const char *);
int sshkey_get_sigtype(const u_char *, size_t, char **);
/* for debug */
void sshkey_dump_ec_point(const EC_GROUP *, const EC_POINT *);
void sshkey_dump_ec_key(const EC_KEY *);
/* private key parsing and serialisation */
int sshkey_private_serialize(struct sshkey *key, struct sshbuf *buf);
int sshkey_private_serialize_opt(struct sshkey *key, struct sshbuf *buf,
enum sshkey_serialize_rep);
int sshkey_private_deserialize(struct sshbuf *buf, struct sshkey **keyp);
/* private key file format parsing and serialisation */
int sshkey_private_to_fileblob(struct sshkey *key, struct sshbuf *blob,
const char *passphrase, const char *comment,
int format, const char *openssh_format_cipher, int openssh_format_rounds);
int sshkey_parse_private_fileblob(struct sshbuf *buffer,
const char *passphrase, struct sshkey **keyp, char **commentp);
int sshkey_parse_private_fileblob_type(struct sshbuf *blob, int type,
const char *passphrase, struct sshkey **keyp, char **commentp);
int sshkey_parse_pubkey_from_private_fileblob_type(struct sshbuf *blob,
int type, struct sshkey **pubkeyp);
int sshkey_check_rsa_length(const struct sshkey *, int);
/* XXX should be internal, but used by ssh-keygen */
int ssh_rsa_complete_crt_parameters(struct sshkey *, const BIGNUM *);
/* stateful keys (e.g. XMSS) */
int sshkey_set_filename(struct sshkey *, const char *);
int sshkey_enable_maxsign(struct sshkey *, u_int32_t);
u_int32_t sshkey_signatures_left(const struct sshkey *);
int sshkey_forward_state(const struct sshkey *, u_int32_t, int);
int sshkey_private_serialize_maxsign(struct sshkey *key,
struct sshbuf *buf, u_int32_t maxsign, int);
void sshkey_sig_details_free(struct sshkey_sig_details *);
#ifdef SSHKEY_INTERNAL
int sshkey_sk_fields_equal(const struct sshkey *a, const struct sshkey *b);
void sshkey_sk_cleanup(struct sshkey *k);
int sshkey_serialize_sk(const struct sshkey *key, struct sshbuf *b);
int sshkey_copy_public_sk(const struct sshkey *from, struct sshkey *to);
int sshkey_deserialize_sk(struct sshbuf *b, struct sshkey *key);
int sshkey_serialize_private_sk(const struct sshkey *key,
struct sshbuf *buf);
int sshkey_private_deserialize_sk(struct sshbuf *buf, struct sshkey *k);
#ifdef WITH_OPENSSL
int check_rsa_length(const RSA *rsa); /* XXX remove */
#endif
#endif
#if !defined(WITH_OPENSSL)
# undef RSA
# undef DSA
# undef EC_KEY
# undef EC_GROUP
# undef EC_POINT
#elif !defined(OPENSSL_HAS_ECC)
# undef EC_KEY
# undef EC_GROUP
# undef EC_POINT
#endif
#endif /* SSHKEY_H */
Reference in New Issue View Git Blame Copy Permalink