SM9EncUserKeyParametersGenerator (Bouncy Castle Library 1.86 API Specification)

All Known Implementing Classes:

SM9EncMasterPrivateKeyParameters
```
public interface SM9EncUserKeyParametersGenerator
```
A master key capable of the KGC user-key extraction for an identity-based encryption-family scheme: deriving a user's private key from the user's identity and the private-key generation function identifier hid the KGC chose (GM/T 0044.3/0044.4-2016 for SM9, where one encryption master key serves key exchange, KEM and public-key encryption, distinguished by hid).

See Also:

SM9SigUserKeyParametersGenerator

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`SM9EncPrivateKeyParameters`	`generateUserKey(byte[] identity, byte hid)`	Derive the private key of the user identified by `identity` under the given hid, a deterministic KGC operation - the same master key, identity and hid always yield the same user key.

- Method Detail
  - generateUserKey
```
SM9EncPrivateKeyParameters generateUserKey(byte[] identity,
                                           byte hid)
```
    Derive the private key of the user identified by identity under the given hid, a deterministic KGC operation - the same master key, identity and hid always yield the same user key.
    
    Parameters:
    
    identity - the user's identity.
    
    hid - the private-key generation function identifier the KGC chose, SM9EncMasterPrivateKeyParameters.HID or SM9EncMasterPrivateKeyParameters.HID_EXCHANGE.
    
    Returns:
    
    the user's private key.