Crypto-Utilities.md

Crypto Utilities

The PowerAuth Mobile JS SDK offers additional crypto functions. These utilities are available through the PowerAuthCryptoUtils class.

Available Methods

hashSha256(data: string)

Calculates SHA256 hash of a parameter encoded as Base64 string.

Usage:

import { PowerAuthCryptoUtils } from 'react-native-powerauth-mobile-sdk';

async function hashSha256(data: string) {
    try {
        const base64 = btoa(unescape(encodeURIComponent(data)));
        const hash = await PowerAuthCryptoUtils.hashSha256(base64);
        // use hash
    } catch (error) {
        console.error('Failed to calculate SHA256 hash:', error);
    }
}

Response: The method returns a Base64 encoded string with SHA256 hash of input parameter.

randomBytes(length: number)

Returns a random byte array of specified length encoded as Base64 string.

Usage:

import { PowerAuthCryptoUtils } from 'react-native-powerauth-mobile-sdk';

async function randomBytes(length: number) {
    try {
        const randomBase64 = await PowerAuthCryptoUtils.randomBytes(length);
        const randomBytes = Uint8Array.from(atob(randomBase64), c => c.charCodeAt(0));
        // use random bytes
    } catch (error) {
        console.error('Failed to get random bytes:', error);
    }
}

Response:

The method returns random bytes array encoded as Base64 string. In order to use the bytes, you need to convert the Base64 string to Uint8Array. (see provided sample code)

Read Next

• Accessing the Native PowerAuthSDK