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SubtleCrypto.sign

The SubtleCrypto.sign() method returns a Promise containing the signature corresponding to the text, algorithm and key given as parameters.

var signature = crypto.subtle.sign(algorithm, key, text2sign);

algorithm specifies the signature algorithm to use and its parameters:
- To use RSASSA-PKCS1-v1_5, pass the string "RSASSA-PKCS1-v1_5" or an object of the form { "name": "RSASSA-PKCS1-v1_5" }.
- To use RSA-PSS, pass a RsaPssParams object.
- To use ECDSA, pass a EcdsaParams object.
- To use HMAC, pass the string "HMAC" or an object of the form { "name": "HMAC" }.
key is a CryptoKey containing the private key to be used for signing.
text2sign is a ArrayBuffer or an ArrayBufferView containing the data to be signed.

The promise is rejected when the following exception is encountered:

InvalidAccessError when the signing key is not a key for the request signing algorithm or when trying to use an algorithm that is either unknown or isn't suitable for signing.

Specification	Status	Comment
Web Cryptography API The definition of 'SubtleCrypto.sign()' in that specification.	Recommendation	Initial definition.

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	37	12 12 Not supported: RSA-PSS, ECDSA.	34 34 32 — 34 Disabled Disabled From version 32 until version 34 (exclusive): this feature is behind the `dom.webcrypto.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	11 11 Returns `CryptoOperation` instead of `Promise`	24	7

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	37	37	12	34 34 32 — 34 Disabled Disabled From version 32 until version 34 (exclusive): this feature is behind the `dom.webcrypto.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	24	7	6.0