view dropbearkey.1 @ 1889:fc4c9ef61856

Split CPPFLAGS and CFLAGS more carefully This has no change to the build, but makes it easier to try other build tools that only want CPPFLAGS
author Matt Johnston <matt@ucc.asn.au>
date Tue, 22 Mar 2022 16:17:05 +0800
parents 5c8913b7464c
children
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.TH dropbearkey 1
.SH NAME
dropbearkey \- create private keys for the use with dropbear(8) or dbclient(1)
.SH SYNOPSIS
.B dropbearkey
\-t
.I type
\-f
.I file
[\-s
.IR bits ]
[\-y]
.SH DESCRIPTION
.B dropbearkey
generates a
\fIRSA\fR, \fIDSS\fR, \fIECDSA\fR, or \fIEd25519\fR
format SSH private key, and saves it to a file for the use with the
Dropbear client or server.
Note that 
some SSH implementations
use the term "DSA" rather than "DSS", they mean the same thing.
.SH OPTIONS
.TP
.B \-t \fItype
Type of key to generate.
Must be one of
.I rsa
.I ecdsa
.I ed25519
or
.IR dss .
.TP
.B \-f \fIfile
Write the secret key to the file
\fIfile\fR. For client authentication ~/.ssh/id_dropbear is loaded by default
.TP
.B \-s \fIbits
Set the key size to
.I bits
bits, should be multiple of 8 (optional). 
.TP
.B \-y
Just print the publickey and fingerprint for the private key in \fIfile\fR.
.SH NOTES
The program dropbearconvert(1) can be used to convert between Dropbear and OpenSSH key formats.
.P
Dropbear does not support encrypted keys. 
.SH EXAMPLE
generate a host-key:
 # dropbearkey -t rsa -f /etc/dropbear/dropbear_rsa_host_key

extract a public key suitable for authorized_keys from private key:
 # dropbearkey -y -f id_rsa | grep "^ssh-rsa " >> authorized_keys
.SH AUTHOR
Matt Johnston ([email protected]).
.br
Gerrit Pape ([email protected]) wrote this manual page.
.SH SEE ALSO
dropbear(8), dbclient(1), dropbearconvert(1)
.P
https://matt.ucc.asn.au/dropbear/dropbear.html