Identifying one of multiple authentication subkeys

[Brian Exelbierd]

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)