On 3/15/2019 11:28 PM, Brian Exelbierd wrote:
> Hi,
>
> I would like to eliminate my SSH keys and consolidate my existing keys into 
> my gpg key.  I can do this by either importing my existing keys (easier) or 
> creating new authentication subkeys.
>
> Either way, I am unsure how to identify which subkey is which SSH key.  I 
> created a test key, below, with two authentication subkeys.  I can't tell 
> which subkey matches each key.  How do you know?  Without this knowledge it 
> is hard to know which key goes with which server and which key is safe to 
> delete later.
>
> Any advice?  Thank you.
>
> regards,
>
> bex
>
> ---
>
> # gpg2 -K --with-keygrip
> /root/.gnupg/pubring.kbx
> ------------------------
> sec   rsa2048 2019-03-15 [SC] [expires: 2021-03-14]
>       84B9177ECD98386DACDA102DF80B5DDF8D55076A
>       Keygrip = 13C8D80A6B3A5A7CC4095A254A07AFC9F287CF16
> uid           [ultimate] keyname
> ssb   rsa2048 2019-03-15 [E] [expires: 2021-03-14]
>       Keygrip = 26FD3D7D54BEE12111354B9E968C23EEDC445A4E
> ssb   rsa2048 2019-03-15 [A]
>       Keygrip = A04EA628443B5C1C60411C15E1EC35C21186D405
> ssb   rsa2048 2019-03-15 [A]
>       Keygrip = 45F02D545B6B6ADC32FCB7BC64B943F23B35D3FF
>
> # ssh-add -l
> 2048 SHA256:T/SZUtqVEzoo4c4rmh5e4jrnCd5ewGNj1Nrsg3VYbCE (none) (RSA)
> 2048 SHA256:+Qbn7T5rQms4+bBfzc7D68H2TynS/8gyT0pjrMOaiQA (none) (RSA)
>
> # ssh-add -L
> ssh-rsa 
> AAAAB3NzaC1yc2EAAAADAQABAAABAQC8vnk7hPdP9tWdw8DUV8rOYDTAlhbvSWPuEUwr0FdaveJoJtgYhceKVoyFnOYZnZ8QP0nAytHGeSAHkL/9Vw0Whyouu94awwoEERdkIzvl/KVRU3n0dBabbjbqlY6Dz+4zjIUo/KbyZ9PZHohCVQs/DzFUqnLsPoHzVVDBPvMHFkf0t2qSe0Pv2I7vLmI1UVBFMspjy80kmoijheFAmXebCGC3uzr23BKqzqfj2/HYv/DJAQufGiHsH+/I855U8Dckd4TQmHS4aRsIY0px1HA4of9nIiWWifvqxwshax2VSdJucJi1RB6YbSxbTIbjnl0YJbbIajV8xJjyloaOofph
>  (none)
> ssh-rsa 
> AAAAB3NzaC1yc2EAAAADAQABAAABAQCnrIe/fe6i6AMA+evGzz3Gc56rSH5D3cJ9R/cMta2jHjtNlZZD/uJNdbuALsI4elB5m0Yxsbiz0j3UG2L/2nHfjD73oPQkwFIacvtkZT/hpp/BWPFDWQnGaWeWdFfsxlzu6gOMsfYJQDxNIPRjLbYkcIOL3Xw5EIFlS2xEr+/ZGsD2uNnReXj5XZnXh6FrxcX7vhnKpHHsVzDZG+xRs+xhErhiini8J1REZaQzZnVftD/WZGbAU8f3LSDfSCFQVxRTibXW5JMd6JfFe1zZXST+JfAEqg5LhucpzsQAbYWtNiqZ5McerI1HYPjYNUqoYhGzXsWvEuvPp3qugVjH3ZI5
>  (none)
>

My understanding is that one subkey is to be used for authentication .

--
John Doe

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