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Diff for /src/usr.bin/ssh/ssh-keygen.1 between version 1.59 and 1.60

version 1.59, 2003/06/10 09:12:11 version 1.60, 2003/07/28 09:49:56
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 .Fl r Ar hostname  .Fl r Ar hostname
 .Op Fl f Ar input_keyfile  .Op Fl f Ar input_keyfile
 .Op Fl g  .Op Fl g
   .Nm ssh-keygen
   .Fl G Ar output_file
   .Op Fl b Ar bits
   .Op Fl M Ar memory
   .Op Fl S Ar start_point
   .Nm ssh-keygen
   .Fl T Ar output_file
   .Fl f Ar input_file
   .Op Fl a Ar num_trials
   .Op Fl W Ar generator
 .Sh DESCRIPTION  .Sh DESCRIPTION
 .Nm  .Nm
 generates, manages and converts authentication keys for  generates, manages and converts authentication keys for
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 .Fl t  .Fl t
 option.  option.
 .Pp  .Pp
   .Nm
   is also used to generate groups for use in Diffie-Hellman group
   exchange (DH-GEX).
   See the
   .Sx MODULI GENERATION
   section for details.
   .Pp
 Normally each user wishing to use SSH  Normally each user wishing to use SSH
 with RSA or DSA authentication runs this once to create the authentication  with RSA or DSA authentication runs this once to create the authentication
 key in  key in
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 .Pp  .Pp
 The options are as follows:  The options are as follows:
 .Bl -tag -width Ds  .Bl -tag -width Ds
   .It Fl a Ar trials
   Specifies the number of primality tests to perform when screening DH-GEX
   candidates using the
   .Fl T
   command.
 .It Fl b Ar bits  .It Fl b Ar bits
 Specifies the number of bits in the key to create.  Specifies the number of bits in the key to create.
 Minimum is 512 bits.  Minimum is 512 bits.
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 .It Fl D Ar reader  .It Fl D Ar reader
 Download the RSA public key stored in the smartcard in  Download the RSA public key stored in the smartcard in
 .Ar reader .  .Ar reader .
   .It Fl G Ar output_file
   Generate candidate primes for DH-GEX.
   These primes must be screened for
   safety (using the
   .Fl T
   option) before use.
   .It Fl M Ar memory
   Specify the amount of memory to use (in megabytes) when generating
   candidate moduli for DH-GEX.
 .It Fl N Ar new_passphrase  .It Fl N Ar new_passphrase
 Provides the new passphrase.  Provides the new passphrase.
 .It Fl P Ar passphrase  .It Fl P Ar passphrase
 Provides the (old) passphrase.  Provides the (old) passphrase.
   .It Fl S Ar start
   Specify start point (in hex) when generating candidate moduli for DH-GEX.
   .It Fl T Ar output_file
   Test DH group exchange candidate primes (generated using the
   .Fl G
   option) for safety.
   .It Fl W Ar generator
   Specify desired generator when testing candidate moduli for DH-GEX.
 .It Fl U Ar reader  .It Fl U Ar reader
 Upload an existing RSA private key into the smartcard in  Upload an existing RSA private key into the smartcard in
 .Ar reader .  .Ar reader .
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 Print DNS resource record with the specified  Print DNS resource record with the specified
 .Ar hostname .  .Ar hostname .
 .El  .El
   .Sh MODULI GENERATION
   .Nm
   may be used to generate groups for the Diffie-Hellman Group Exchange
   (DH-GEX) protocol.
   Generating these groups is a two-step process: first, candidate
   primes are generated using a fast, but memory intensive process.
   These candidate primes are then tested for suitability (a CPU-intensive
   process).
   .Pp
   Generation of primes is performed using the
   .Fl G
   option.
   The desired length of the primes may be specified by the
   .Fl b
   option.
   For example:
   .Pp
   .Dl ssh-keygen -G moduli-2048.candidates -b 2048
   .Pp
   By default, the search for primes begins at a random point in the
   desired length range.
   This may be overridden using the
   .Fl S
   option, which specifies a different start point (in hex).
   .Pp
   Once a set of candidates have been generated, they must be tested for
   suitability.
   This may be performed using the
   .Fl T
   option.
   In this mode
   .Nm
   will read candidates from standard input (or a file specified using the
   .Fl f
   option).
   For example:
   .Pp
   .Dl ssh-keygen -T moduli-2048 -f moduli-2048.candidates
   .Pp
   By default, each candidate will be subjected to 100 primality tests.
   This may be overridden using the
   .Fl a
   option.
   The DH generator value will be chosen automatically for the
   prime under consideration.
   If a specific generator is desired, it may be requested using the
   .Fl W
   option.
   Valid generator values are 2, 3 and 5.
   .Pp
   Screened DH groups may be installed in
   .Pa /etc/moduli .
   It is important that this file contains moduli of a range of bit lengths and
   that both ends of a connection share common moduli.
 .Sh FILES  .Sh FILES
 .Bl -tag -width Ds  .Bl -tag -width Ds
 .It Pa $HOME/.ssh/identity  .It Pa $HOME/.ssh/identity
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 on all machines  on all machines
 where the user wishes to log in using public key authentication.  where the user wishes to log in using public key authentication.
 There is no need to keep the contents of this file secret.  There is no need to keep the contents of this file secret.
   .It Pa /etc/moduli
   Contains Diffie-Hellman groups used for DH-GEX.
   The file format is described in
   .Xr moduli 5 .
 .El  .El
 .Sh SEE ALSO  .Sh SEE ALSO
 .Xr ssh 1 ,  .Xr ssh 1 ,
 .Xr ssh-add 1 ,  .Xr ssh-add 1 ,
 .Xr ssh-agent 1 ,  .Xr ssh-agent 1 ,
   .Xr moduli 5 ,
 .Xr sshd 8  .Xr sshd 8
 .Rs  .Rs
 .%A J. Galbraith  .%A J. Galbraith
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