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hmac( algorithm, secret, data, outputEncoding )
Note
A module with a better and standard API exists.
The new k6/experimental/webcrypto API partially implements the WebCryptoAPI, supporting more features than k6/crypto.
Use HMAC to sign a piece of data using a shared secret.
Parameter | Type | Description |
---|---|---|
algorithm | string | The hashing algorithm to use. One of md4 , md5 , sha1 , sha256 , sha384 , sha512 , sha512_224 , sha512_256 or ripemd160 . |
secret | string / ArrayBuffer | A shared secret used to sign the data. |
data | string / ArrayBuffer | The data to sign. |
outputEncoding | string | Describes the type of encoding to use for the hash value. Can be “base64”, “base64url”, “base64rawurl”, “hex” or “binary”. |
Returns
Type | Description |
---|---|
string / Array | The hash digest as string (for “base64”, “base64url”, “base64rawurl”, “hex” outputEncoding ) or raw array of integers (for “binary” outputEncoding ). |
Example
JavaScript
import crypto from 'k6/crypto';
export default function () {
let hash = crypto.hmac('sha256', 'mysecret', 'hello world!', 'hex');
console.log(hash);
const binArray = [104, 101, 108, 108, 111, 32, 119, 111, 114, 108, 100, 33];
hash = crypto.hmac('sha256', 'mysecret', new Uint8Array(binArray).buffer, 'hex');
console.log(hash);
}
The above script should result in the following being printed during execution:
bash
INFO[0000] 893a72d8cab129e5ba85aea4599fd53f59bfe652cff4098a3780313228d8c20f
INFO[0000] 893a72d8cab129e5ba85aea4599fd53f59bfe652cff4098a3780313228d8c20f
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