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61 lines
2.2 KiB
Groff
61 lines
2.2 KiB
Groff
.\" Copyright (C) Daniel Stenberg
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.\" SPDX-License-Identifier: BSD-3-Clause
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.TH libssh2_knownhost_check 3 "28 May 2009" "libssh2" "libssh2"
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.SH NAME
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libssh2_knownhost_check - check a host+key against the list of known hosts
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.SH SYNOPSIS
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.nf
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#include <libssh2.h>
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int
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libssh2_knownhost_check(LIBSSH2_KNOWNHOSTS *hosts,
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const char *host,
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const char *key, size_t keylen,
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int typemask,
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struct libssh2_knownhost **knownhost);
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.fi
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.SH DESCRIPTION
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Checks a host and its associated key against the collection of known hosts,
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and returns info back about the (partially) matched entry.
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\fIhost\fP is a pointer the host name in plain text. The host name can be the
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IP numerical address of the host or the full name.
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\fIkey\fP is a pointer to the key for the given host.
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\fIkeylen\fP is the total size in bytes of the key pointed to by the \fIkey\fP
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argument
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\fItypemask\fP is a bitmask that specifies format and info about the data
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passed to this function. Specifically, it details what format the host name is,
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what format the key is and what key type it is.
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The host name is given as one of the following types:
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LIBSSH2_KNOWNHOST_TYPE_PLAIN or LIBSSH2_KNOWNHOST_TYPE_CUSTOM.
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The key is encoded using one of the following encodings:
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LIBSSH2_KNOWNHOST_KEYENC_RAW or LIBSSH2_KNOWNHOST_KEYENC_BASE64.
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\fIknownhost\fP if set to non-NULL, it must be a pointer to a 'struct
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libssh2_knownhost' pointer that gets filled in to point to info about a known
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host that matches or partially matches.
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.SH RETURN VALUE
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\fIlibssh2_knownhost_check(3)\fP returns info about how well the provided
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host + key pair matched one of the entries in the list of known hosts.
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LIBSSH2_KNOWNHOST_CHECK_FAILURE - something prevented the check to be made
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LIBSSH2_KNOWNHOST_CHECK_NOTFOUND - no host match was found
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LIBSSH2_KNOWNHOST_CHECK_MATCH - hosts and keys match.
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LIBSSH2_KNOWNHOST_CHECK_MISMATCH - host was found, but the keys did not match!
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.SH AVAILABILITY
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Added in libssh2 1.2
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.SH EXAMPLE
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See the ssh2_exec.c example as provided in the tarball.
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.SH SEE ALSO
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.BR libssh2_knownhost_init(3)
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.BR libssh2_knownhost_free(3)
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.BR libssh2_knownhost_add(3)
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