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Added example of server side signature verification #239

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Added example of server side signature verification #239

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a83b6b3
Added example of server side signature verification
Jan 27, 2023
69b05d4
Fixed example to match typescript typings
Jan 31, 2023
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21 changes: 21 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -288,6 +288,27 @@ rnBiometrics.createSignature({
})
```

__Node.js example of server-side signature verification__

```js
const crypto = require('crypto');

async function veryfySignature(publicKey, signature, payload) {
const cryptoKey = await crypto.subtle.importKey('spki',
Buffer.from(publicKey, 'base64'),
{ name: 'RSASSA-PKCS1-v1_5', hash: "SHA-256" },
true, ['verify']
);

const verify = crypto.createVerify('SHA256');
verify.write(payload);
verify.end();

return verify.verify(crypto.KeyObject.from(cryptoKey), signature, 'base64')
}

```

### simplePrompt(options)

Prompts the user for their fingerprint or face id. Returns a `Promise` that resolves if the user provides a valid biometrics or cancel the prompt, otherwise the promise rejects.
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