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

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Extends

  • BaseCryptoClass

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Constructors

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new SymmetricKeyBuilder()

new SymmetricKeyBuilder(): SymmetricKeyBuilder

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Returns

SymmetricKeyBuilder

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Methods

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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.

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Parameters

rawKey
ArrayBuffer The actual bytes to be used as the symmetric key.

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Returns

Promise<SymmetricKey> Promise A promise that resolves to the built symmetric key.

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buildGenerated()

buildGenerated(): Promise<SymmetricKey> Build a new symmetric key based on the configured properties.

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Throws

  • If the chosen key size is invalid.

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Returns

Promise<SymmetricKey> Promise A promise that resolves to the generated symmetric key.
Last modified on July 22, 2026