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SSH-KEYSIGN


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BSD mandoc

 

NAME

ssh-keysign

– ssh helper program for host-based authentication

 

SYNOPSIS

 

DESCRIPTION

is used by
ssh(1)

to access the local host keys and generate the digital signature
required during host-based authentication with SSH protocol version 2.

is disabled by default and can only be enabled in the
global client configuration file
/etc/ssh/ssh_config

by setting
EnableSSHKeysign

to
“yes”

is not intended to be invoked by the user, but from
ssh(1).

See
ssh(1)

and
sshd(8)

for more information about host-based authentication.
 

FILES


/etc/ssh/ssh_config



Controls whether

is enabled.

/etc/ssh/ssh_host_dsa_key, /etc/ssh/ssh_host_rsa_key



These files contain the private parts of the host keys used to
generate the digital signature.
They should be owned by root, readable only by root, and not
accessible to others.
Since they are readable only by root,

must be set-uid root if host-based authentication is used.


 

ENVIRONMENT


SSH_USE_STRONG_RNG



The reseeding of the OpenSSL random generator is usually done from
/dev/urandom

If the
SSH_USE_STRONG_RNG

environment variable is set to value other than
0

the OpenSSL random generator is reseeded from
/dev/random

The number of bytes read is defined by the SSH_USE_STRONG_RNG value.
Minimum is 14 bytes.
This setting is not recommended on the computers without the hardware
random generator because insufficient entropy causes the connection to
be blocked until enough entropy is available.


 

SEE ALSO

ssh(1),

ssh-keygen1,

ssh_config5,

sshd(8)

 

HISTORY

first appeared in
Ox 3.2 .

 

AUTHORS

An Markus Friedl Aq [email protected]



 

Index



NAME

SYNOPSIS

DESCRIPTION

FILES

ENVIRONMENT

SEE ALSO

HISTORY

AUTHORS



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