Class GCM

constructor

• new GCM(cipher): GCM

• Creates a new GCM instance with the given block cipher.

  Block size of cipher must be equal to 16.

  Parameters

  • cipher: BlockCipher

  Returns GCM

ReadonlynonceLength

ReadonlytagLength

clean

• clean(): this

• Wipes state from memory. Doesn't wipe the underlying block cipher state.

  Returns this

open

• open(nonce, sealed, associatedData?, dst?): null | Uint8Array

• Authenticates sealed ciphertext (which includes authentication tag) and associated data, decrypts ciphertext and returns decrypted plaintext.

  If authentication fails, it returns null.

  If dst is given (it must be of ciphertext length minus tag length), the result will be put into it. Dst and plaintext must not overlap.

  Parameters

  • nonce: Uint8Array
  • sealed: Uint8Array
  • OptionalassociatedData: Uint8Array
  • Optionaldst: Uint8Array

  Returns null | Uint8Array

seal

• seal(nonce, plaintext, associatedData?, dst?): Uint8Array

• Encrypts and authenticates plaintext, authenticates associated data, and returns sealed ciphertext, which includes authentication tag.

  If dst is given (it must be the size of plaintext + the size of tag length) the result will be put into it. Dst and plaintext must not overlap.

  Parameters

  • nonce: Uint8Array
  • plaintext: Uint8Array
  • OptionalassociatedData: Uint8Array
  • Optionaldst: Uint8Array

  Returns Uint8Array