From 0b6b94e6b6152f15cf4c2247c5974f539aae28cd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 10 Apr 2024 21:49:46 +0200 Subject: Adding upstream version 1:9.6p1. Signed-off-by: Daniel Baumann --- hostfile.h | 123 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 123 insertions(+) create mode 100644 hostfile.h (limited to 'hostfile.h') diff --git a/hostfile.h b/hostfile.h new file mode 100644 index 0000000..a24a4e3 --- /dev/null +++ b/hostfile.h @@ -0,0 +1,123 @@ +/* $OpenBSD: hostfile.h,v 1.29 2021/01/26 00:51:30 djm Exp $ */ + +/* + * Author: Tatu Ylonen + * Copyright (c) 1995 Tatu Ylonen , 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". + */ +#ifndef HOSTFILE_H +#define HOSTFILE_H + +typedef enum { + HOST_OK, HOST_NEW, HOST_CHANGED, HOST_REVOKED, HOST_FOUND +} HostStatus; + +typedef enum { + MRK_ERROR, MRK_NONE, MRK_REVOKE, MRK_CA +} HostkeyMarker; + +struct hostkey_entry { + char *host; + char *file; + u_long line; + struct sshkey *key; + HostkeyMarker marker; + u_int note; /* caller-specific note/flag */ +}; +struct hostkeys { + struct hostkey_entry *entries; + u_int num_entries; +}; + +struct hostkeys *init_hostkeys(void); +void load_hostkeys(struct hostkeys *, const char *, + const char *, u_int); +void load_hostkeys_file(struct hostkeys *, const char *, + const char *, FILE *, u_int note); +void free_hostkeys(struct hostkeys *); + +HostStatus check_key_in_hostkeys(struct hostkeys *, struct sshkey *, + const struct hostkey_entry **); +int lookup_key_in_hostkeys_by_type(struct hostkeys *, int, int, + const struct hostkey_entry **); +int lookup_marker_in_hostkeys(struct hostkeys *, int); + +int hostfile_read_key(char **, u_int *, struct sshkey *); +int add_host_to_hostfile(const char *, const char *, + const struct sshkey *, int); + +int hostfile_replace_entries(const char *filename, + const char *host, const char *ip, struct sshkey **keys, size_t nkeys, + int store_hash, int quiet, int hash_alg); + +#define HASH_MAGIC "|1|" +#define HASH_DELIM '|' + +#define CA_MARKER "@cert-authority" +#define REVOKE_MARKER "@revoked" + +char *host_hash(const char *, const char *, u_int); + +/* + * Iterate through a hostkeys file, optionally parsing keys and matching + * hostnames. Allows access to the raw keyfile lines to allow + * streaming edits to the file to take place. + */ +#define HKF_WANT_MATCH (1) /* return only matching hosts/addrs */ +#define HKF_WANT_PARSE_KEY (1<<1) /* need key parsed */ + +#define HKF_STATUS_OK 0 /* Line parsed, didn't match host */ +#define HKF_STATUS_INVALID 1 /* line had parse error */ +#define HKF_STATUS_COMMENT 2 /* valid line contained no key */ +#define HKF_STATUS_MATCHED 3 /* hostname or IP matched */ + +#define HKF_MATCH_HOST (1) /* hostname matched */ +#define HKF_MATCH_IP (1<<1) /* address matched */ +#define HKF_MATCH_HOST_HASHED (1<<2) /* hostname was hashed */ +#define HKF_MATCH_IP_HASHED (1<<3) /* address was hashed */ +/* XXX HKF_MATCH_KEY_TYPE? */ + +/* + * The callback function receives this as an argument for each matching + * hostkey line. The callback may "steal" the 'key' field by setting it to NULL. + * If a parse error occurred, then "hosts" and subsequent options may be NULL. + */ +struct hostkey_foreach_line { + const char *path; /* Path of file */ + u_long linenum; /* Line number */ + u_int status; /* One of HKF_STATUS_* */ + u_int match; /* Zero or more of HKF_MATCH_* OR'd together */ + char *line; /* Entire key line; mutable by callback */ + int marker; /* CA/revocation markers; indicated by MRK_* value */ + const char *hosts; /* Raw hosts text, may be hashed or list multiple */ + const char *rawkey; /* Text of key and any comment following it */ + int keytype; /* Type of key; KEY_UNSPEC for invalid/comment lines */ + struct sshkey *key; /* Key, if parsed ok and HKF_WANT_MATCH_HOST set */ + const char *comment; /* Any comment following the key */ + u_int note; /* caller-specified note copied from arguments */ +}; + +/* + * Callback fires for each line (or matching line if a HKF_WANT_* option + * is set). The foreach loop will terminate if the callback returns a non- + * zero exit status. + */ +typedef int hostkeys_foreach_fn(struct hostkey_foreach_line *l, void *ctx); + +/* Iterate over a hostkeys file */ +int hostkeys_foreach(const char *path, + hostkeys_foreach_fn *callback, void *ctx, + const char *host, const char *ip, u_int options, u_int note); +int hostkeys_foreach_file(const char *path, FILE *f, + hostkeys_foreach_fn *callback, void *ctx, + const char *host, const char *ip, u_int options, u_int note); + +void hostfile_create_user_ssh_dir(const char *, int); + +#endif -- cgit v1.2.3