SSL Certificate Authority

internal.dn42 is signed by an internally maintained CA that is only allowed to sign *.dn42 domains or 172.22.0.0/15 ip addresses.

The name constraints can be verified for example by using openssl:

  openssl x509 -in dn42.crt -text -noout

which will show among other things:

  X509v3 Name Constraints: 
    Permitted:
      DNS:.dn42

Certificate fingerprint

$ openssl x509 -sha256 -fingerprint -noout -in dn42.crt
SHA256 Fingerprint=8C:8E:C1:12:DB:85:3E:59:CB:1A:DF:90:74:A4:0C:83:B5:ED:57:1E:BC:06:E0:0D:80:B3:47:68:11:77:E1:C9

Test Sites with a bad key

The following sites have been setup to demonstrate the key failing when signed for invalid subject alternates.

badkey.sour.is

badkey.xuu.me

badkey.xuu.dn42

If you would like to trust the certificate import the following:

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

If you would like to have a certificate signed by this CA send a CSR to [email protected]