Key Export (Cangjie)

Note:

Currently in the beta phase.

Used when a business needs to obtain the public key of a persistently stored asymmetric key. Currently supports exporting public keys for ECC/RSA/ED25519/X25519/SM2.

Note:

Lightweight devices only support RSA public key export.

Development Steps

1. Specify the key alias keyAlias, with a maximum length of 128 bytes.

2. Call the interface exportKeyItem, passing the parameters keyAlias and options. options is a reserved parameter and can currently be passed as empty.

3. The return value is of type Bytes, encapsulated in the standard DER format of X.509 specification. For details, refer to Public Key Material Format.

Example

import kit.PerformanceAnalysisKit.Hilog
import kit.BasicServicesKit.*
import kit.CoreFileKit.*
import kit.AbilityKit.*
import kit.UniversalKeystoreKit.*

func loggerInfo(str: String) {
    Hilog.info(0, "CangjieTest", str)
}

/* 1. Set key alias */
let keyAlias = "keyAlias"

/* 2. Pass empty options object */
let emptyOptions: HuksOptions = HuksOptions(properties: [], inData: Bytes())

try {
    /* 3. Export public key */
    let b = exportKeyItem(keyAlias, emptyOptions)
    loggerInfo("exportKeyItem success")
} catch (e: Exception) {
    loggerInfo("exportKeyItem input arg invalid")
}