Host Protocols Direct Protocol ATCRYPTO class HASH AND SIGN
April 13, 2023 at 2:39 AMHASH AND SIGN instruction
Role
This instruction allows to compute a signature using one of the ECC private keys stored in the ATECC Secure Element. The message is passed as-is.
Access condition
Depending on the configuration-defined access conditions and on the type of host interface (Local / Remote), this instruction may either be freely usable or restricted to authenticated communications.
Command
| Field | Value |
|---|---|
| CLA | 59 (ATCRYPTO) |
| INS | 47 |
| Data byte 0 | Key index (00 to 0D) |
| Data byte 1..N | Raw message |
Response
| Field | Value |
|---|---|
| CLA | 59 (ATCRYPTO) |
| STA | 00 |
| Data bytes 0..N | Signature |