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#!rsc by RouterOS
# RouterOS script: check-certificates
# Copyright (c) 2013-2023 Christian Hesse <mail@eworm.de>
# https://git.eworm.de/cgit/routeros-scripts/about/COPYING.md
#
# check for certificate validity
# https://git.eworm.de/cgit/routeros-scripts/about/doc/check-certificates.md
:local 0 "check-certificates";
:global GlobalFunctionsReady;
:while ($GlobalFunctionsReady != true) do={ :delay 500ms; }
:global CertRenewTime;
:global CertRenewUrl;
:global CertWarnTime;
:global Identity;
:global CertificateAvailable
:global EscapeForRegEx;
:global IfThenElse;
:global LogPrintExit2;
:global ParseKeyValueStore;
:global SendNotification2;
:global SymbolForNotification;
:global UrlEncode;
:global WaitFullyConnected;
:local CheckCertificatesDownloadImport do={
:local Name [ :tostr $1 ];
:global CertRenewUrl;
:global CertRenewPass;
:global CertificateNameByCN;
:global LogPrintExit2;
:global UrlEncode;
:global WaitForFile;
:local Return false;
:foreach Type in={ ".pem"; ".p12" } do={
:local CertFileName ([ $UrlEncode $Name ] . $Type);
:do {
/tool/fetch check-certificate=yes-without-crl \
($CertRenewUrl . $CertFileName) dst-path=$CertFileName as-value;
$WaitForFile $CertFileName;
:local DecryptionFailed true;
:foreach PassPhrase in=$CertRenewPass do={
:local Result [ /certificate/import file-name=$CertFileName passphrase=$PassPhrase as-value ];
:if ($Result->"decryption-failures" = 0) do={
:set DecryptionFailed false;
}
}
/file/remove [ find where name=$CertFileName ];
:if ($DecryptionFailed = true) do={
$LogPrintExit2 warning $0 ("Decryption failed for certificate file " . $CertFileName) false;
}
:foreach CertInChain in=[ /certificate/find where name~("^" . $CertFileName . "_[0-9]+\$") \
common-name!=$Name !(subject-alt-name~("(^|\\W)(DNS|IP):" . [ $EscapeForRegEx $Name ] . "(\\W|\$)")) !(common-name=[]) ] do={
$CertificateNameByCN [ /certificate/get $CertInChain common-name ];
}
:set Return true;
} on-error={
$LogPrintExit2 debug $0 ("Could not download certificate file " . $CertFileName) false;
}
}
:return $Return;
}
:local FormatInfo do={
:local CertVal $1;
:global IfThenElse;
:global ParseKeyValueStore;
:local FormatExpire do={
:global CharacterReplace;
:return [ $CharacterReplace [ $CharacterReplace [ :tostr $1 ] "w" "w " ] "d" "d " ];
}
:local FormatSANs do={
:local SANs $1;
:local Return "";
:foreach SAN in=$SANs do={
:set Return ($Return . "\n " . $SAN);
}
:return $Return;
}
:return ( \
"Name: " . ($CertVal->"name") . "\n" . \
[ $IfThenElse ([ :len ($CertVal->"common-name") ] > 0) ("CommonName: " . ($CertVal->"common-name") . "\n") ] . \
[ $IfThenElse ([ :len ($CertVal->"subject-alt-name") ] > 0) ("SubjectAltNames:" . [ $FormatSANs ($CertVal->"subject-alt-name") ] . "\n") ] . \
"Private key: " . [ $IfThenElse (($CertVal->"private-key") = true) "available" "missing" ] . "\n" . \
"Fingerprint: " . ($CertVal->"fingerprint") . "\n" . \
"Issuer: " . ($CertVal->"ca") . ([ $ParseKeyValueStore ($CertVal->"issuer") ]->"CN") . "\n" . \
"Validity: " . ($CertVal->"invalid-before") . " to " . ($CertVal->"invalid-after") . "\n" . \
"Expires in: " . [ $IfThenElse (($CertVal->"expired") = true) "expired" [ $FormatExpire ($CertVal->"expires-after") ] ]);
}
$WaitFullyConnected;
:foreach Cert in=[ /certificate/find where !revoked !ca !scep-url expires-after<$CertRenewTime ] do={
:local CertVal [ /certificate/get $Cert ];
:local LastName;
:do {
:if ([ :len $CertRenewUrl ] = 0) do={
$LogPrintExit2 info $0 ("No CertRenewUrl given.") true;
}
$LogPrintExit2 info $0 ("Attempting to renew certificate " . ($CertVal->"name") . ".") false;
:local ImportSuccess false;
:set LastName ($CertVal->"common-name");
:set ImportSuccess [ $CheckCertificatesDownloadImport $LastName ];
:foreach SAN in=($CertVal->"subject-alt-name") do={
:if ($ImportSuccess = false) do={
:set LastName [ :pick $SAN ([ :find $SAN ":" ] + 1) [ :len $SAN ] ];
:set ImportSuccess [ $CheckCertificatesDownloadImport $LastName ];
}
}
:local CertNew [ /certificate/find where name~("^" . [ $EscapeForRegEx [ $UrlEncode $LastName ] ] . "\\.(p12|pem)_[0-9]+\$") \
(common-name=($CertVal->"common-name") or subject-alt-name~("(^|\\W)(DNS|IP):" . [ $EscapeForRegEx $LastName ] . "(\\W|\$)")) \
fingerprint!=[ :tostr ($CertVal->"fingerprint") ] expires-after>$CertRenewTime ];
:local CertNewVal [ /certificate/get $CertNew ];
:if ([ $CertificateAvailable ([ $ParseKeyValueStore ($CertNewVal->"issuer") ]->"CN") ] = false) do={
$LogPrintExit2 warning $0 ("The certificate chain is not available!") false;
}
:if ($Cert != $CertNew) do={
$LogPrintExit2 debug $0 ("Certificate '" . $CertVal->"name" . "' was not updated, but replaced.") false;
:if (($CertVal->"private-key") = true && ($CertVal->"private-key") != ($CertNewVal->"private-key")) do={
/certificate/remove $CertNew;
$LogPrintExit2 warning $0 ("Old certificate '" . ($CertVal->"name") . "' has a private key, new certificate does not. Aborting renew.") true;
}
/ip/service/set certificate=($CertNewVal->"name") [ find where certificate=($CertVal->"name") ];
/ip/ipsec/identity/set certificate=($CertNewVal->"name") [ find where certificate=($CertVal->"name") ];
/ip/ipsec/identity/set remote-certificate=($CertNewVal->"name") [ find where remote-certificate=($CertVal->"name") ];
/ip/hotspot/profile/set ssl-certificate=($CertNewVal->"name") [ find where ssl-certificate=($CertVal->"name") ];
/certificate/remove $Cert;
/certificate/set $CertNew name=($CertVal->"name");
:set CertNewVal;
:set CertVal [ /certificate/get $CertNew ];;
}
$SendNotification2 ({ origin=$0; silent=true; \
subject=([ $SymbolForNotification "lock-with-ink-pen" ] . "Certificate renewed"); \
message=("A certificate on " . $Identity . " has been renewed.\n\n" . [ $FormatInfo $CertVal ]) });
$LogPrintExit2 info $0 ("The certificate " . ($CertVal->"name") . " has been renewed.") false;
} on-error={
$LogPrintExit2 debug $0 ("Could not renew certificate " . ($CertVal->"name") . ".") false;
}
}
:foreach Cert in=[ /certificate/find where !revoked !scep-url !(expires-after=[]) \
expires-after<$CertWarnTime !(fingerprint=[]) ] do={
:local CertVal [ /certificate/get $Cert ];
:if ([ :len [ /certificate/scep-server/find where ca-cert=($CertVal->"ca") ] ] > 0) do={
$LogPrintExit2 debug $0 ("Certificate \"" . ($CertVal->"name") . "\" is handled by SCEP, skipping.") false;
} else={
:local State [ $IfThenElse (($CertVal->"expired") = true) "expired" "is about to expire" ];
$SendNotification2 ({ origin=$0; \
subject=([ $SymbolForNotification "warning-sign" ] . "Certificate warning!"); \
message=("A certificate on " . $Identity . " " . $State . ".\n\n" . [ $FormatInfo $CertVal ]) });
$LogPrintExit2 info $0 ("The certificate " . ($CertVal->"name") . " " . $State . \
", it is invalid after " . ($CertVal->"invalid-after") . ".") false;
}
}
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