Key Derivation

Bindings for the crypto_kdf API. See the libsodium crypto_kdf docs for more information.

Constants

Buffer lengths (integer)

  • crypto_kdf_KEYBYTES
  • crypto_kdf_BYTES_MIN
  • crypto_kdf_BYTES_MAX
  • crypto_kdf_CONTEXTBYTES

String constants (string)

  • crypto_kdf_PRIMITIVE

crypto_kdf_keygen

sodium-native sodium-javascript

sodium.crypto_kdf_keygen(key)

Generates a new master key.

  • key should be a buffer of length crypto_kdf_KEYBYTES

crypto_kdf_derive_from_key

sodium-native sodium-javascript

sodium.crypto_kdf_derive_from_key(subkey, subkeyId, ctx, key)

Derives a new key from a master key.

  • subkey should be a buffer between crypto_kdf_BYTES_MIN and crypto_kdf_BYTES_MAX
  • subkeyId should be an integer
  • ctx should be a buffer of length crypto_kdf_CONTEXTBYTES
  • key should be a buffer of length crypto_kdf_KEYBYTES
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