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#!rsc by RouterOS
# RouterOS script: mod/ssh-keys-import
# Copyright (c) 2020-2023 Christian Hesse <mail@eworm.de>
# https://git.eworm.de/cgit/routeros-scripts/about/COPYING.md
#
# import ssh keys for public key authentication
# https://git.eworm.de/cgit/routeros-scripts/about/doc/mod/ssh-keys-import.md
:global SSHKeysImport;
:global SSHKeysImportFile;
# import single key passed as string
:set SSHKeysImport do={
:local Key [ :tostr $1 ];
:local User [ :tostr $2 ];
:global GetRandom20CharAlNum;
:global LogPrintExit2;
:global MkDir;
:global WaitForFile;
:if ([ :len $Key ] = 0 || [ :len $User ] = 0) do={
$LogPrintExit2 warning $0 ("Missing argument(s), please pass key and user!") true;
}
:if ([ :len [ /user/find where name=$User ] ] = 0) do={
$LogPrintExit2 warning $0 ("User '" . $User . "' does not exist.") true;
}
:if ([ $MkDir "tmpfs/ssh-keys-import" ] = false) do={
$LogPrintExit2 warning $0 ("Creating directory 'tmpfs/ssh-keys-import' failed!") true;
}
:local FileName ("tmpfs/ssh-keys-import/key-" . [ $GetRandom20CharAlNum 6 ] . ".pub");
/file/add name=$FileName contents=$Key;
$WaitForFile $FileName;
:do {
/user/ssh-keys/import public-key-file=$FileName user=$User;
} on-error={
$LogPrintExit2 warning $0 ("Failed importing key.") true;
}
}
# import keys from a file
:set SSHKeysImportFile do={
:local FileName [ :tostr $1 ];
:local User [ :tostr $2 ];
:global EitherOr;
:global LogPrintExit2;
:global ParseKeyValueStore;
:global RequiredRouterOS;
:global SSHKeysImport;
:if ([ :len $FileName ] = 0 || [ :len $User ] = 0) do={
$LogPrintExit2 warning $0 ("Missing argument(s), please pass file name and user!") true;
}
:local File [ /file/find where name=$FileName ];
:if ([ :len $File ] = 0) do={
$LogPrintExit2 warning $0 ("File '" . $FileName . "' does not exist.") true;
}
:local Keys ([ /file/get $FileName contents ] . "\n");
:do {
:local Continue false;
:local Line [ :pick $Keys 0 [ :find $Keys "\n" ] ];
:set Keys [ :pick $Keys ([ :find $Keys "\n" ] + 1) [ :len $Keys ] ];
:local Type [ :pick $Line 0 [ :find $Line " " ] ];
:if (([ $RequiredRouterOS $0 "7.12beta1" ] = true && $Type = "ssh-ed25519") || $Type = "ssh-rsa") do={
$SSHKeysImport $Line $User;
:set Continue true;
}
:if ($Continue = false && $Type = "#") do={
:set User [ $EitherOr ([ $ParseKeyValueStore [ :pick $Line 2 [ :len $Line ] ] ]->"user") $User ];
:set Continue true;
}
:if ($Continue = false && [ :len $Type ] > 0) do={
$LogPrintExit2 warning $0 ("SSH key of type '" . $Type . "' is not supported.") false;
}
} while=([ :len $Keys ] > 0);
}
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