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(* Module: Ssh Parses ssh client configuration Author: Jiri Suchomel <jsuchome@suse.cz> About: Reference ssh_config man page About: License This file is licensed under the GPL. About: Lens Usage Sample usage of this lens in augtool (start code) augtool> set /files/etc/ssh/ssh_config/Host example.com augtool> set /files/etc/ssh/ssh_config/Host[.='example.com']/RemoteForward/machine1:1234 machine2:5678 augtool> set /files/etc/ssh/ssh_config/Host[.='example.com']/Ciphers/1 aes128-ctr augtool> set /files/etc/ssh/ssh_config/Host[.='example.com']/Ciphers/2 aes192-ctr (end code) *) module Ssh = autoload xfm (************************************************************************ * Group: USEFUL PRIMITIVES *************************************************************************) let eol = Util.doseol let spc = Util.del_ws_spc let spc_eq = del /[ \t]+|[ \t]*=[ \t]*/ " " let comment = Util.comment let empty = Util.empty let comma = Util.del_str "," let indent = Util.indent let value_to_eol = store Rx.space_in let value_to_spc = store /[^ \t\r\n=][^ \t\r\n]*/ let value_to_comma = store /[^, \t\r\n=][^, \t\r\n]*/ (************************************************************************ * Group: ENTRIES *************************************************************************) let array_entry (k:regexp) = [ indent . key k . counter "array_entry" . [ spc . seq "array_entry" . value_to_spc]* . eol ] let commas_entry (k:regexp) = let value = [ seq "commas_entry" . value_to_comma] in [ indent . key k . counter "commas_entry" . spc_eq . Build.opt_list value comma . eol ] let spaces_entry (k:regexp) = let value = [ seq "spaces_entry" . value_to_spc ] in [ indent . key k . counter "spaces_entry" . spc_eq . Build.opt_list value spc . eol ] let fw_entry (k:regexp) = [ indent . key k . spc_eq . [ key /[^ \t\r\n\/=][^ \t\r\n\/]*/ . spc . value_to_eol . eol ]] let send_env = array_entry /SendEnv/i let proxy_command = [ indent . key /ProxyCommand/i . spc . value_to_eol . eol ] let remote_fw = fw_entry /RemoteForward/i let local_fw = fw_entry /LocalForward/i let ciphers = commas_entry /Ciphers/i let macs = commas_entry /MACs/i let algorithms = commas_entry /(HostKey|Kex)Algorithms/i let pubkey_accepted_key_types = commas_entry /PubkeyAcceptedKeyTypes/i let global_knownhosts_file = spaces_entry /GlobalKnownHostsFile/i let rekey_limit = [ indent . key /RekeyLimit/i . spc_eq . [ label "amount" . value_to_spc ] . [ spc . label "duration" . value_to_spc ]? . eol ] let special_entry = send_env | proxy_command | remote_fw | local_fw | macs | ciphers | algorithms | pubkey_accepted_key_types | global_knownhosts_file | rekey_limit let key_re = /[A-Za-z0-9]+/ - /SendEnv|Host|Match|ProxyCommand|RemoteForward|LocalForward|MACs|Ciphers|(HostKey|Kex)Algorithms|PubkeyAcceptedKeyTypes|GlobalKnownHostsFile|RekeyLimit/i let other_entry = [ indent . key key_re . spc_eq . value_to_spc . eol ] let entry = comment | empty | special_entry | other_entry let host = [ key /Host/i . spc . value_to_eol . eol . entry* ] let condition_entry = let k = /[A-Za-z0-9]+/ in let no_spc = Quote.do_dquote_opt (store /[^"' \t\r\n=]+/) in let with_spc = Quote.do_quote (store /[^"'\t\r\n]* [^"'\t\r\n]*/) in [ spc . key k . spc . no_spc ] | [ spc . key k . spc . with_spc ] let match_cond = [ label "Condition" . condition_entry+ . eol ] let match_entry = entry let match = [ key /Match/i . match_cond . [ label "Settings" . match_entry+ ] ] (************************************************************************ * Group: LENS *************************************************************************) let lns = entry* . (host | match)* let xfm = transform lns (incl "/etc/ssh/ssh_config" . incl (Sys.getenv("HOME") . "/.ssh/config") . incl "/etc/ssh/ssh_config.d/*.conf")
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