Pbkdf2Params
The Pbkdf2Params dictionary of the Web Crypto API represents the object that should be passed as the algorithm parameter into SubtleCrypto.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
namewith 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-1is 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 useSHA-1, don't. Use a different digest algorithm instead. salt-
An
ArrayBuffer, aTypedArray, or aDataView. This should be a random or pseudo-random value of at least 16 bytes. Unlike the input key material passed intoderiveKey(),saltdoes not need to be kept secret. iterations-
A
Numberrepresenting the number of times the hash function will be executed inderiveKey(). This determines how computationally expensive (that is, slow) thederiveKey()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 SubtleCrypto.deriveKey().
Specifications
| Specification |
|---|
| Web Cryptography Level 2> # dfn-Pbkdf2Params> |
Browser compatibility
Browsers that support the "PBKDF2" algorithm for the SubtleCrypto.deriveKey() method will support this type.