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Overview

Certificate manager is used to:

  • collecting all certificates inside the router;
  • manage and create self-signed certificates;
  • control and set SCEP related configuration.;

Starting from RouterOS version 6 certificate validity is shown using local time zone offset. In previous versions it was UTF.

General Menu

/certificate


General menu is used to manage certificates, add templates, issue certificates and manage SCEP Clients.

Certificate Template

Certificate templates are deleted right after certificate issue or certificate request command is executed:

/certificate
add name=CA-Template common-name=CAtemp key-usage=key-cert-sign,crl-sign 
add name=Server common-name=server
add name=Client common-name=client

Let`s print out certificates:

[admin@4k11] /certificate> print detail 
Flags: K - private-key; L - crl; C - smart-card-key; A - authority; I - issued, R - revoked; E - expired; T - trusted 
 0         name="CA-Template" key-type=rsa common-name="CAtemp" key-size=2048 subject-alt-name="" days-valid=365 key-usage=key-cert-sign,crl-sign 

 1         name="Server" key-type=rsa common-name="server" key-size=2048 subject-alt-name="" days-valid=365 
           key-usage=digital-signature,key-encipherment,data-encipherment,key-cert-sign,crl-sign,tls-server,tls-client 

 2         name="Client" key-type=rsa common-name="client" key-size=2048 subject-alt-name="" days-valid=365 
           key-usage=digital-signature,key-encipherment,data-encipherment,key-cert-sign,crl-sign,tls-server,tls-client 

If CA certificate is removed then all issued certificates in the chain are also removed.

Sign Certificate

Certificates should be signed. In the following example, we will sign certificates and add CRL URL for the server certificate:

/certificate 
sign CA-Template 
sign Client      
sign Server ca-crl-host=192.168.88.1 name=ServerCA

Let`s check is certificates are signed:

[admin@MikroTik] /certificate> print
Flags: K - private-key; L - crl; A - authority; T - trusted
Columns: NAME, COMMON-name, FINGERPRINT
#        NAME         COMMON  FINGERPRINT                                                     
0  K AT  CA-Template  CAtemp  0c7aaa7607a4dde1bbf33deaae6be7bac9fe4064ba47d64e8a73dcefad6cfc38
1  K AT  Client       client  b3ff25ecb166ea41e15733a7493003f3ea66310c10390c33e98fe32364c3659f
2  KLAT  ServerCA     server  152b88c9d81f4b765a59e2302e01efd1fbf11ceeed6e59f4974e87787a5bb980

The time of the key signing process depends on key-size of a specific certificate. With values 4k and higher, it might take a substantial time to sign this specific certificate on less powerful CPU based devices.

Export Certificate

It is possible to export client certificates with keys and CA certificate:

/certificate 
export-certificate CA-Template 
export-certificate ServerCA export-passphrase=yourpassphrase
export-certificate Client export-passphrase=yourpassphrase

Exported certificates are available under /file section:

[admin@MikroTik] > file print
Columns: NAME, TYPE, SIZE, CREATION-TIME
#  NAME                         TYPE        SIZE  CREATION-TIME       
0  skins                        directory         jan/19/2019 00:00:04
1  flash                        directory         jan/19/2019 01:00:00
2  flash/rw                     directory         jan/19/2019 01:00:00
3  flash/rw/disk                directory         jan/19/2019 01:00:00
4  pub                          directory         jan/19/2019 02:42:16
5  cert_export_CA-Template.crt  .crt file   1119  jan/19/2019 04:15:21
6  cert_export_ServerCA.crt     .crt file   1229  jan/19/2019 04:15:42
7  cert_export_ServerCA.key     .key file   1858  jan/19/2019 04:15:42
8  cert_export_Client.crt       .crt file   1164  jan/19/2019 04:15:55
9  cert_export_Client.key       .key file   1858  jan/19/2019 04:15:55
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