Class HkdfSha256

algHash

hashSize

id

buildLabeledIkm

• buildLabeledIkm(label: Uint8Array, ikm: Uint8Array): Uint8Array

  Builds a labeled input keying material.

  Parameters

  • label: Uint8Array

    A byte string indicating the cryptographic context/operation.
  • ikm: Uint8Array

  Returns Uint8Array

  An input keying material as bytes.

buildLabeledInfo

• buildLabeledInfo(label: Uint8Array, info: Uint8Array, len: number): Uint8Array

  Builds a labeled info string.

  Parameters

  • label: Uint8Array

    A byte string indicating the cryptographic context/operation.
  • info: Uint8Array

    An additional byte string.
  • len: number

    The length of the output byte string.

  Returns Uint8Array

  An info string as bytes.

expand

• expand(prk: ArrayBuffer, info: ArrayBuffer, len: number): Promise<ArrayBuffer>

  Expands a pseudorandom key prk.

  Parameters

  • prk: ArrayBuffer

    A pseudorandom key.
  • info: ArrayBuffer

    An additional byte string.
  • len: number

    The length in bytes of the output keying material.

  Returns Promise<ArrayBuffer>

  An output keying material as bytes.

extractAndExpand

• extractAndExpand(
      salt: ArrayBuffer,
      ikm: ArrayBuffer,
      info: ArrayBuffer,
      len: number,
  ): Promise<ArrayBuffer>

  Extracts a pseudorandom key and expand it to a specified length keying material.

  Parameters

  • salt: ArrayBuffer

    An additional random byte string.
  • ikm: ArrayBuffer

    An input keying material
  • info: ArrayBuffer

    An additional byte string.
  • len: number

    The length in bytes of the output keying material.

  Returns Promise<ArrayBuffer>

  An output keying material as bytes.

init

• init(suiteId: Uint8Array): void

  Initializes the instance by setting a suite_id defined in RFC9180.

  Parameters

  • suiteId: Uint8Array

    A suite_id defined in RFC9180.

  Returns void

labeledExpand

• labeledExpand(
      prk: ArrayBuffer,
      label: Uint8Array,
      info: Uint8Array,
      len: number,
  ): Promise<ArrayBuffer>

  Extracts a pseudorandom key with label.

  Parameters

  • prk: ArrayBuffer

    A pseudorandom key.
  • label: Uint8Array

    A byte string indicating the cryptographic context/operation.
  • info: Uint8Array

    An additional byte string.
  • len: number

    The length in bytes of the output keying material.

  Returns Promise<ArrayBuffer>

  An output keying material as bytes.

labeledExtract

• labeledExtract(
      salt: ArrayBuffer,
      label: Uint8Array,
      ikm: Uint8Array,
  ): Promise<ArrayBuffer>

  Extracts a pseudorandom key with label.

  Parameters

  • salt: ArrayBuffer

    An additional random byte string.
  • label: Uint8Array

    A byte string indicating the cryptographic context/operation.
  • ikm: Uint8Array

    An input keying material

  Returns Promise<ArrayBuffer>

  A pseudorandom key as bytes.