Unable to include option object in the SHA3 function using typescript

The SHA3 function allows for customizing the output length, as demonstrated in the code snippet below:

var hash = CryptoJS.SHA3("Message", { outputLength: 512 });
var hash = CryptoJS.SHA3("Message", { outputLength: 384 });
var hash = CryptoJS.SHA3("Message", { outputLength: 256 });
var hash = CryptoJS.SHA3("Message", { outputLength: 224 });

However, when attempting to specify the outputLength parameter in TypeScript with @types/crypto-js, an error is encountered:

Argument of type '{ outputLength: number; }' is not assignable to parameter of type 'string | WordArray | undefined'. Object literal may only specify known properties, and 'outputLength' does not exist in type 'string | WordArray | undefined'.

typescripttypescript-typingscryptojs

Answer №1

The reason for this is due to how the function is defined within the @types/crypto-js module:

(message: string | LibWordArray, key?: string | WordArray, ...options: any[]) => WordArray;

As you can see, it requires three parameters with the second one being the key (which can be null). To resolve this issue, simply use the following code:

CryptoJS.SHA3("Message", undefined, { outputLength: 512});

This should fix the problem.

Additionally, there's another @types package available for this library called @types\cryptojs, which may be more suitable for your needs.

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