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annotate dropbearconvert.1 @ 1630:9579377b5f8b

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use strlcpy & strlcat (#74) * refactor checkpubkeyperms() with safe BSD functions fix gcc8 warnings ``` svr-authpubkey.c: In function 'checkpubkeyperms': svr-authpubkey.c:427:2: warning: 'strncat' specified bound 5 equals source length [-Wstringop-overflow=] strncat(filename, "/.ssh", 5); /* strlen("/.ssh") == 5 */ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ svr-authpubkey.c:433:2: warning: 'strncat' specified bound 16 equals source length [-Wstringop-overflow=] strncat(filename, "/authorized_keys", 16); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``` see https://www.sudo.ws/todd/papers/strlcpy.html * restore strlcpy in xstrdup see original https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/xmalloc.c?rev=1.16
author François Perrad <francois.perrad@gadz.org>
date Wed, 20 Mar 2019 15:09:19 +0100
parents 80cacacfec23
children 863f31b4cf3c
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1 .TH dropbearconvert 1
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2 .SH NAME
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3 dropbearconvert \- convert between Dropbear and OpenSSH private key formats
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4 .SH SYNOPSIS
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5 .B dropbearconvert
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6 .I input_type
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7 .I output_type
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8 .I input_file
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9 .I output_file
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10 .SH DESCRIPTION
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11 .B Dropbear
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12 and
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13 .B OpenSSH
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14 SSH implementations have different private key formats.
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15 .B dropbearconvert
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16 can convert between the two.
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17 .P
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18 Dropbear uses the same SSH public key format as OpenSSH, it can be extracted
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19 from a private key by using
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20 .B dropbearkey \-y
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21 .P
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22 Encrypted private keys are not supported, use ssh-keygen(1) to decrypt them
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23 first.
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24 .SH ARGUMENTS
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25 .TP
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26 .I input_type
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27 Either
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28 .I dropbear
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29 or
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30 .I openssh
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31 .TP
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32 .I output_type
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33 Either
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34 .I dropbear
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35 or
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36 .I openssh
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37 .TP
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38 .I input_file
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39 An existing Dropbear or OpenSSH private key file
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40 .TP
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41 .I output_file
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42 The path to write the converted private key file. For client authentication ~/.ssh/id_dropbear is loaded by default
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43 .SH EXAMPLE
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44 # dropbearconvert openssh dropbear ~/.ssh/id_rsa ~/.ssh/id_dropbear
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45 .SH AUTHOR
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46 Matt Johnston ([email protected]).
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47 .SH SEE ALSO
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48 dropbearkey(1), ssh-keygen(1)
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49 .P
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50 https://matt.ucc.asn.au/dropbear/dropbear.html