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  5. Derive Ecdh

    DERIVE ECDH

    Perform an ECDH operation.

    Description

    Perform an ECDH key exchange with the private key in the device.

    Shell Example

    Perform an ECDH operation with key 0x52b6 and a public key in the file pubkey.pem:

    yubihsm> derive ecdh 0 0x52b6 pubkey.pem
5898516bcb0cb3db89d53471137c2d1c741b8ba6ebf2bb01f4a62d97342e97b2

    Protocol Details

    Command

    Tc = 0x57

    Lc = 2 + LD

    Vc = K || D

    I := Object ID of the Asymmetric Key (2 bytes)

    D := Uncompressed public key to perform the exchange with (57, 65, 97, 129 or 133 bytes)

    Response

    Tc = 0xd7

    Lc = LX

    Vc = X

    X := X coordinate of the completed key exchange