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lib: remove useless input parameters and make 'digest' clear in the doc #22858

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lib: remove useless input parameters and make 'digest' clear in the doc #22858

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6 changes: 6 additions & 0 deletions doc/api/crypto.md
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Original file line number Diff line number Diff line change
Expand Up @@ -1784,6 +1784,9 @@ otherwise `err` will be `null`. By default, the successfully generated
`derivedKey` will be passed to the callback as a [`Buffer`][]. An error will be
thrown if any of the input arguments specify invalid values or types.

If `digest` is `null`, `'sha1'` will be used. This behavior will be deprecated
in a future version of Node.js.

The `iterations` argument must be a number set as high as possible. The
higher the number of iterations, the more secure the derived key will be,
but will take a longer amount of time to complete.
Expand Down Expand Up @@ -1847,6 +1850,9 @@ applied to derive a key of the requested byte length (`keylen`) from the
If an error occurs an `Error` will be thrown, otherwise the derived key will be
returned as a [`Buffer`][].

If `digest` is `null`, `'sha1'` will be used. This behavior will be deprecated
in a future version of Node.js.

The `iterations` argument must be a number set as high as possible. The
higher the number of iterations, the more secure the derived key will be,
but will take a longer amount of time to complete.
Expand Down
6 changes: 3 additions & 3 deletions lib/internal/crypto/pbkdf2.js
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Expand Up @@ -23,7 +23,7 @@ function pbkdf2(password, salt, iterations, keylen, digest, callback) {
}

({ password, salt, iterations, keylen, digest } =
check(password, salt, iterations, keylen, digest, callback));
check(password, salt, iterations, keylen, digest));

if (typeof callback !== 'function')
throw new ERR_INVALID_CALLBACK();
Expand All @@ -43,15 +43,15 @@ function pbkdf2(password, salt, iterations, keylen, digest, callback) {

function pbkdf2Sync(password, salt, iterations, keylen, digest) {
({ password, salt, iterations, keylen, digest } =
check(password, salt, iterations, keylen, digest, pbkdf2Sync));
check(password, salt, iterations, keylen, digest));
const keybuf = Buffer.alloc(keylen);
handleError(keybuf, password, salt, iterations, digest);
const encoding = getDefaultEncoding();
if (encoding === 'buffer') return keybuf;
return keybuf.toString(encoding);
}

function check(password, salt, iterations, keylen, digest, callback) {
function check(password, salt, iterations, keylen, digest) {
if (typeof digest !== 'string') {
if (digest !== null)
throw new ERR_INVALID_ARG_TYPE('digest', ['string', 'null'], digest);
Expand Down