Re: [Uta] WGLC for draft-ietf-uta-rfc6125bis-06

[Peter Saint-Andre <[e-mail]>]

On 6/27/22 4:27 PM, Viktor Dukhovni wrote:
> On Mon, Jun 27, 2022 at 02:37:22PM -0600, Peter Saint-Andre wrote:
> 
>>> It does for the majority of the certificate usages, but in practice
>>> today DANE is primarily used with SMTP, and predominantly with
>>> DANE-EE(3) TLSA records, in which case identity questions are settleda
>>> at the DNS layer, and the presented identifiers in the certificate are
>>> irrelevant.
>>
>> Even in this case, doesn't the certificate include a service identifier?
> 
> Actually, no.  A handful of DANE SMTP server operators configure
> certificates that have empty Subject and Issuer DNs and no Subject
> Alternative names.  The certificate is (kind-of) self-signed and
> essentially holds just the public key and its self-signature.

Excellent. Thanks for the clarification. Thus in the case of DANE-EE 
certs it truly is the case that, as you said in a previous message, the 
equivalent of the presented identifier is derived purely from DNS.

Peter

> 
> For example:
> 
> subject=
> issuer=
> notBefore=Jul 27 14:59:59 2014 GMT
> notAfter=Nov 27 14:59:59 3013 GMT
> -----BEGIN CERTIFICATE-----
> MIIE1TCCAr2gAwIBAgIJAMMmKxPKsTZyMA0GCSqGSIb3DQEBCwUAMAAwIBcNMTQw
> NzI3MTQ1OTU5WhgPMzAxMzExMjcxNDU5NTlaMAAwggIiMA0GCSqGSIb3DQEBAQUA
> A4ICDwAwggIKAoICAQC200I1aOkqnrr48PS/MLULQM0QSyCUqvzo07G4Fcwkun+V
> tYWS6dWXcNP9s8mRutWFXcZtmIvDs3l0p0HG9N8UU7uQIXJxuuJWAwoLqdvVktOQ
> WE7rpItRgNtfVibPmyaoLkLfVBSGTh+tspxXVBZ6OSWjs5CX63CSBCcQtv2ecE+y
> AuL6bZDrmgxkPDGGTJiZRwB1ttC7gAITx0OXJOwePrEc1se33vzou8bYIHQWCSct
> FxelpEHQ9mDeooT65I3dHph+GXWkh1IYRdltOT4ssmQaEzcmP3KMff4u1ibXzDeq
> Bkov6rwPAF/VMHnoESFkA7mR5dpHa31D5l4g6B0dHj24V2IBmBNbzKifa9I04G+G
> uKydifHpJ7n4Vc6iijMrrDplwPsSuPdaR6bqg4CID8rU1dxiXAjZz+bK/jIAnuPA
> U5kho8lPZgf8YeIgGAF/Yd3hcrX9w5cjKlG/QlhkDStOzIWgXgFSK3tG8GMZm6Ne
> LHAjNqOpOrNgLq14aJbOpEzqE3cCl8RVgvP9O/P0ZU7dO/7S3dDaKeg+3anjxhbb
> 6/iQctxUNxcVyUMf3p1bAl4DqT54dRVNvIS/oH5KaH0rxsW12gmL80VugiuLvuld
> t7Pw6A0EjOO4yiMd3BAJCS4evyNMZ75kwZD9YlcX1DPmHUxw11j2F17SS9UfmwID
> AQABo1AwTjAdBgNVHQ4EFgQUmMab1SBcHagxOb14ETf/va1bvVkwHwYDVR0jBBgw
> FoAUmMab1SBcHagxOb14ETf/va1bvVkwDAYDVR0TBAUwAwEB/zANBgkqhkiG9w0B
> AQsFAAOCAgEAjUcd319j7Nt7o6OmUNB29RqG2iG/eE1Mq++vob7ppSkgawWjiIUO
> Vxec5oz1h8cHo3vtffQDB1putL+c220zJK5NDjkGVJ5xaPZdWOkZ/+/i5Xypudoh
> 3RQZ2MFrq679L4YUuY+/d3W4B8wKYooAmMT7Duzv9xGICgUO75vAmOA5R8CDr1r2
> qj2PLF2xlbSToYa/HbFFkeV/b2OrWc8DTsA3/s6fLc1koYFiAHkyTbBDLlhux3n3
> tnS+yWXGL9DpuFZg1EZI2G3asoFZqfSUjMSf9qsWb/EE5+kquwQfTcXC4AuwYNgc
> MVnaxjJsd4vb53eITRVFyeq4lVrT1l8Z7c1dhA0wdXCso5ptg/68YPq7K0jXEutK
> 40C/AVapDdT8SYhwawokNujC3epsZ89e0gp6MbiSk3z1jJGO6dk57B/ymAw91TMz
> U72xY7YY4yDGUCrxCVBdiGl2kTihwUdxCRJ1baAXcq3meEAY0wQEcDq/dEUMSHp7
> /gr9/8uu94VQ+uIjc4dU6oB+yV/agD+vBDpY2EskdVigxZQKuI5iFX4+2kGoooAb
> xkMDriyM/MeD3zjfuBLSrMEQtGZ1d8ilb0kWxCcEwv5SpO9ihiUA584C501syGCD
> H0y62RuD2sxdv4k3BKeFYt5NLE7QE8TNgVFKsAdTlW9Cni4yEnscwcM=
> -----END CERTIFICATE-----
>