Decrypt a Yubico OTP.
Decrypt a Yubico OTP and return counters and timer information.
Decrypt a (hex encoded) Yubico OTP using key ID 0x027c:
yubihsm> otp decrypt 0 0x027c 2f5d71a4915dec304aa13ccf97bb0dbb aead OTP decoded, useCtr:1, sessionCtr:1, tstph:1, tstpl:1
Tc = 0x60 |
Lc = 2 + 36 + 16 |
Vc = K || A || O |
I := Object ID of the OTP AEAD Key (2 bytes)
A := Nonce concatenated with AEAD (36 bytes)
O := OTP (16 bytes)
Tr = 0xe0 |
Lr = 6 |
Vr = S || U || Th || Tl |
S := Session counter (2 bytes)
U := Usage counter (1 byte)
Th := Timestamp high (1 byte)
Tl := Timestamp low (2 bytes)