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Diff for /src/usr.bin/ssh/ssh-keygen.1 between version 1.40.2.3 and 1.41

version 1.40.2.3, 2002/03/09 00:20:45 version 1.41, 2001/05/05 13:42:52
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 .Nm ssh-keygen  .Nm ssh-keygen
 .Op Fl q  .Op Fl q
 .Op Fl b Ar bits  .Op Fl b Ar bits
 .Fl t Ar type  .Op Fl t Ar type
 .Op Fl N Ar new_passphrase  .Op Fl N Ar new_passphrase
 .Op Fl C Ar comment  .Op Fl C Ar comment
 .Op Fl f Ar output_keyfile  .Op Fl f Ar output_keyfile
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 .Nm ssh-keygen  .Nm ssh-keygen
 .Fl B  .Fl B
 .Op Fl f Ar input_keyfile  .Op Fl f Ar input_keyfile
 .Nm ssh-keygen  
 .Fl D Ar reader  
 .Nm ssh-keygen  
 .Fl U Ar reader  
 .Op Fl f Ar input_keyfile  
 .Sh DESCRIPTION  .Sh DESCRIPTION
 .Nm  .Nm
 generates, manages and converts authentication keys for  generates, manages and converts authentication keys for
 .Xr ssh 1 .  .Xr ssh 1 .
 .Nm  .Nm
 can create RSA keys for use by SSH protocol version 1 and RSA or DSA  defaults to generating a RSA1 key for use by SSH protocol version 1.
 keys for use by SSH protocol version 2. The type of key to be generated  specifying the
 is specified with the  
 .Fl t  .Fl t
 option.  option allows you to create a key for use by SSH protocol version 2.
 .Pp  .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
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 The passphrase may be empty to indicate no passphrase  The passphrase may be empty to indicate no passphrase
 (host keys must have an empty passphrase), or it may be a string of  (host keys must have an empty passphrase), or it may be a string of
 arbitrary length.  arbitrary length.
 A passphrase is similar to a password, except it can be a phrase with a  Good passphrases are 10-30 characters long and are
 series of words, punctuation, numbers, whitespace, or any string of  
 characters you want.  
 Good passphrases are 10-30 characters long, are  
 not simple sentences or otherwise easily guessable (English  not simple sentences or otherwise easily guessable (English
 prose has only 1-2 bits of entropy per character, and provides very bad  prose has only 1-2 bits of entropy per word, and provides very bad
 passphrases), and contain a mix of upper and lowercase letters,  passphrases).
 numbers, and non-alphanumeric characters.  
 The passphrase can be changed later by using the  The passphrase can be changed later by using the
 .Fl p  .Fl p
 option.  option.
 .Pp  .Pp
 There is no way to recover a lost passphrase.  There is no way to recover a lost passphrase.
 If the passphrase is  If the passphrase is
 lost or forgotten, a new key must be generated and copied to the  lost or forgotten, you will have to generate a new key and copy the
 corresponding public key to other machines.  corresponding public key to other machines.
 .Pp  .Pp
 For RSA1 keys,  For RSA1 keys,
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 The default is 1024 bits.  The default is 1024 bits.
 .It Fl c  .It Fl c
 Requests changing the comment in the private and public key files.  Requests changing the comment in the private and public key files.
 This operation is only supported for RSA1 keys.  
 The program will prompt for the file containing the private keys, for  The program will prompt for the file containing the private keys, for
 the passphrase if the key has one, and for the new comment.  the passphrase if the key has one, and for the new comment.
 .It Fl e  .It Fl e
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 to stdout.  to stdout.
 This option allows exporting keys for use by several commercial  This option allows exporting keys for use by several commercial
 SSH implementations.  SSH implementations.
 .It Fl f Ar filename  .It Fl f
 Specifies the filename of the key file.  Specifies the filename of the key file.
 .It Fl i  .It Fl i
 This option will read an unencrypted private (or public) key file  This option will read an unencrypted private (or public) key file
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 This option allows importing keys from several commercial  This option allows importing keys from several commercial
 SSH implementations.  SSH implementations.
 .It Fl l  .It Fl l
 Show fingerprint of specified public key file.  Show fingerprint of specified private or public key file.
 Private RSA1 keys are also supported.  
 For RSA and DSA keys  
 .Nm  
 tries to find the matching public key file and prints its fingerprint.  
 .It Fl p  .It Fl p
 Requests changing the passphrase of a private key file instead of  Requests changing the passphrase of a private key file instead of
 creating a new private key.  creating a new private key.
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 or  or
 .Dq dsa  .Dq dsa
 for protocol version 2.  for protocol version 2.
   The default is
   .Dq rsa1 .
 .It Fl B  .It Fl B
 Show the bubblebabble digest of specified private or public key file.  Show the bubblebabble digest of specified private or public key file.
 .It Fl C Ar comment  .It Fl C Ar comment
 Provides the new comment.  Provides the new comment.
 .It Fl D Ar reader  
 Download the RSA public key stored in the smartcard in  
 .Ar reader .  
 .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 U Ar reader  
 Upload an existing RSA private key into the smartcard in  
 .Ar reader .  
 .El  .El
 .Sh FILES  .Sh FILES
 .Bl -tag -width Ds  .Bl -tag -width Ds
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 This file is not automatically accessed by  This file is not automatically accessed by
 .Nm  .Nm
 but it is offered as the default file for the private key.  but it is offered as the default file for the private key.
 .Xr ssh 1  .Xr sshd 8
 will read this file when a login attempt is made.  will read this file when a login attempt is made.
 .It Pa $HOME/.ssh/identity.pub  .It Pa $HOME/.ssh/identity.pub
 Contains the protocol version 1 RSA public key for authentication.  Contains the protocol version 1 RSA public key for authentication.
 The contents of this file should be added to  The contents of this file should be added to
 .Pa $HOME/.ssh/authorized_keys  .Pa $HOME/.ssh/authorized_keys
 on all machines  on all machines
 where the user wishes to log in using RSA authentication.  where you wish to log in using RSA 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 $HOME/.ssh/id_dsa  .It Pa $HOME/.ssh/id_dsa
 Contains the protocol version 2 DSA authentication identity of the user.  Contains the protocol version 2 DSA authentication identity of the user.
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 This file is not automatically accessed by  This file is not automatically accessed by
 .Nm  .Nm
 but it is offered as the default file for the private key.  but it is offered as the default file for the private key.
 .Xr ssh 1  .Xr sshd 8
 will read this file when a login attempt is made.  will read this file when a login attempt is made.
 .It Pa $HOME/.ssh/id_dsa.pub  .It Pa $HOME/.ssh/id_dsa.pub
 Contains the protocol version 2 DSA public key for authentication.  Contains the protocol version 2 DSA public key for authentication.
 The contents of this file should be added to  The contents of this file should be added to
 .Pa $HOME/.ssh/authorized_keys  .Pa $HOME/.ssh/authorized_keys2
 on all machines  on all machines
 where the user wishes to log in using public key authentication.  where you wish 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 $HOME/.ssh/id_rsa  .It Pa $HOME/.ssh/id_rsa
 Contains the protocol version 2 RSA authentication identity of the user.  Contains the protocol version 2 RSA authentication identity of the user.
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 This file is not automatically accessed by  This file is not automatically accessed by
 .Nm  .Nm
 but it is offered as the default file for the private key.  but it is offered as the default file for the private key.
 .Xr ssh 1  .Xr sshd 8
 will read this file when a login attempt is made.  will read this file when a login attempt is made.
 .It Pa $HOME/.ssh/id_rsa.pub  .It Pa $HOME/.ssh/id_rsa.pub
 Contains the protocol version 2 RSA public key for authentication.  Contains the protocol version 2 RSA public key for authentication.
 The contents of this file should be added to  The contents of this file should be added to
 .Pa $HOME/.ssh/authorized_keys  .Pa $HOME/.ssh/authorized_keys2
 on all machines  on all machines
 where the user wishes to log in using public key authentication.  where you wish 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.
 .El  .El
 .Sh AUTHORS  .Sh AUTHORS
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  Added in v.1.41