Pbkdf2Params

The Pbkdf2Params dictionary of the Web Crypto API represents the object that should be passed as the algorithm parameter into deriveKey(), when using the PBKDF2 algorithm.

Instance properties

• name

  • : A string. This should be set to PBKDF2.

• hash

  • : A string or an object containing a single property called name with a string value. It is an identifier for the digest algorithm to use. This should be one of the following:

    • SHA-256: selects the SHA-256 algorithm.
    • SHA-384: selects the SHA-384 algorithm.
    • SHA-512: selects the SHA-512 algorithm.

    [!WARNING] SHA-1 is considered vulnerable in most cryptographic applications, but is still considered safe in PBKDF2. However, it’s advisable to transition away from it everywhere, so unless you need to use SHA-1, don’t. Use a different digest algorithm instead.

• salt

  • : An ArrayBuffer, a TypedArray, or a DataView. This should be a random or pseudo-random value of at least 16 bytes. Unlike the input key material passed into deriveKey(), salt does not need to be kept secret.

• iterations

  • : A Number representing the number of times the hash function will be executed in deriveKey(). This determines how computationally expensive (that is, slow) the deriveKey() operation will be. In this context, slow is good, since it makes it more expensive for an attacker to run a dictionary attack against the keys. The general guidance here is to use as many iterations as possible, subject to keeping an acceptable level of performance for your application.

Examples

See the examples for deriveKey().

Specifications

Browser compatibility

Browsers that support the “PBKDF2” algorithm for the deriveKey() method will support this type.

See also

• deriveKey().