#format creole
#language en
Possible enhancement to OpenPGP card specification 2.0.1

* p22: 4.3.3.6 Algorithm Attributes
** ECDSA:

|= Byte|= Length |= Value |
| 01   | 01     | Algorithm ID (RFC6637), 19 = ECDSA |
| 02-| any     | OID of the curve, e.g.: 2A 86 48 CE 3D 03 01 07 for NIST P-256, 2B 81 04 00 0A for secp256k1 |

* p23: 4.3.3.7 Private Key Template
** ECDSA:

|4D|xx| Extended Header list |
|  |  | B6 or B8 or A4 | 00 | Control Reference Template to indicate the private key |
|  |  | 7F48 | xx | cardholder private key template |
|  |  |      |    | ??9x?? | Ld | 9x=Tag of private key d, Ld=Length of private key d |
|  |  | 5F48 | xx | keydata... |

* p38: 7.2.8 Compute Digital Signature, DSI for ECDSA
  32-byte for NIST P-256 or secp256k1.

* p41: 7.2.9 PSO: Decipher
  Decryption by ECDH. TBD.

* p44: 7.2.11 Generate Asymmetric Key Pair
  06 xx OID (optional???)
  86 xx public key MPI