SymmetricKeyBuilder

A builder class for creating and importing symmetric keys. This class provides methods to configure key properties and generate or import symmetric keys.

Extends

• BaseCryptoClass

Constructors

new SymmetricKeyBuilder()

new SymmetricKeyBuilder(): SymmetricKeyBuilder

Returns

SymmetricKeyBuilder

Methods

buildFromRaw()

buildFromRaw(rawKey: ArrayBuffer): Promise<SymmetricKey>

Build a symmetric key from raw bytes.

The created key will inherit the properties (algorithm, purposes, exportability) set on this builder.

Parameters

rawKey

ArrayBuffer

The actual bytes to be used as the symmetric key.

Returns

Promise<SymmetricKey>

Promise A promise that resolves to the built symmetric key.

---

buildGenerated()

buildGenerated(): Promise<SymmetricKey>

Build a new symmetric key based on the configured properties.

Throws

• If the chosen key size is invalid.

Returns

Promise<SymmetricKey>

Promise A promise that resolves to the generated symmetric key.

---

Last updated: Jul 22, 2026