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109 lines
3.8 KiB
C
109 lines
3.8 KiB
C
/* $OpenBSD: hostfile.h,v 1.24 2015/02/16 22:08:57 djm Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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* All rights reserved
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*
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* As far as I am concerned, the code I have written for this software
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* can be used freely for any purpose. Any derived versions of this
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* software must be clearly marked as such, and if the derived work is
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* incompatible with the protocol description in the RFC file, it must be
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* called by a name other than "ssh" or "Secure Shell".
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*/
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#ifndef HOSTFILE_H
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#define HOSTFILE_H
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typedef enum {
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HOST_OK, HOST_NEW, HOST_CHANGED, HOST_REVOKED, HOST_FOUND
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} HostStatus;
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typedef enum {
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MRK_ERROR, MRK_NONE, MRK_REVOKE, MRK_CA
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} HostkeyMarker;
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struct hostkey_entry {
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char *host;
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char *file;
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u_long line;
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struct sshkey *key;
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HostkeyMarker marker;
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};
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struct hostkeys;
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struct hostkeys *init_hostkeys(void);
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void load_hostkeys(struct hostkeys *, const char *, const char *);
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void free_hostkeys(struct hostkeys *);
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HostStatus check_key_in_hostkeys(struct hostkeys *, struct sshkey *,
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const struct hostkey_entry **);
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int lookup_key_in_hostkeys_by_type(struct hostkeys *, int,
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const struct hostkey_entry **);
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int hostfile_read_key(char **, u_int *, struct sshkey *);
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int add_host_to_hostfile(const char *, const char *,
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const struct sshkey *, int);
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int hostfile_replace_entries(const char *filename,
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const char *host, const char *ip, struct sshkey **keys, size_t nkeys,
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int store_hash, int quiet, int hash_alg);
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#define HASH_MAGIC "|1|"
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#define HASH_DELIM '|'
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#define CA_MARKER "@cert-authority"
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#define REVOKE_MARKER "@revoked"
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char *host_hash(const char *, const char *, u_int);
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/*
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* Iterate through a hostkeys file, optionally parsing keys and matching
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* hostnames. Allows access to the raw keyfile lines to allow
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* streaming edits to the file to take place.
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*/
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#define HKF_WANT_MATCH (1) /* return only matching hosts/addrs */
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#define HKF_WANT_PARSE_KEY (1<<1) /* need key parsed */
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#define HKF_STATUS_OK 0 /* Line parsed, didn't match host */
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#define HKF_STATUS_INVALID 1 /* line had parse error */
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#define HKF_STATUS_COMMENT 2 /* valid line contained no key */
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#define HKF_STATUS_MATCHED 3 /* hostname or IP matched */
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#define HKF_MATCH_HOST (1) /* hostname matched */
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#define HKF_MATCH_IP (1<<1) /* address matched */
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#define HKF_MATCH_HOST_HASHED (1<<2) /* hostname was hashed */
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#define HKF_MATCH_IP_HASHED (1<<3) /* address was hashed */
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/* XXX HKF_MATCH_KEY_TYPE? */
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/*
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* The callback function receives this as an argument for each matching
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* hostkey line. The callback may "steal" the 'key' field by setting it to NULL.
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* If a parse error occurred, then "hosts" and subsequent options may be NULL.
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*/
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struct hostkey_foreach_line {
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const char *path; /* Path of file */
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u_long linenum; /* Line number */
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u_int status; /* One of HKF_STATUS_* */
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u_int match; /* Zero or more of HKF_MATCH_* OR'd together */
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char *line; /* Entire key line; mutable by callback */
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int marker; /* CA/revocation markers; indicated by MRK_* value */
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const char *hosts; /* Raw hosts text, may be hashed or list multiple */
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const char *rawkey; /* Text of key and any comment following it */
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int keytype; /* Type of key; KEY_UNSPEC for invalid/comment lines */
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struct sshkey *key; /* Key, if parsed ok and HKF_WANT_MATCH_HOST set */
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const char *comment; /* Any comment following the key */
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};
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/*
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* Callback fires for each line (or matching line if a HKF_WANT_* option
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* is set). The foreach loop will terminate if the callback returns a non-
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* zero exit status.
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*/
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typedef int hostkeys_foreach_fn(struct hostkey_foreach_line *l, void *ctx);
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/* Iterate over a hostkeys file */
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int hostkeys_foreach(const char *path, hostkeys_foreach_fn *callback, void *ctx,
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const char *host, const char *ip, u_int options);
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#endif
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