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524434b63f
* Drop dependency + use built-in `base64url` [`create-hmac`](https://github.com/browserify/createHmac) is meant for compat between node and browser compat and was last updated in 2018. Computing the HMAC signature on the client (browser) does not make any sense in 99% of the use-cases, as the secrets would be needed on the client side. This means that we can drop browser support and just use the native node module, which is also exported by the `create-hmac` when running on node. `Buffer.toString()` also accepts "base64url" as an encoding, so we can drop the `urlSafeBase64` in favor of that. * Use encoder from hmac instance
21 lines
618 B
JavaScript
21 lines
618 B
JavaScript
import { createHmac } from 'node:crypto';
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const KEY = '943b421c9eb07c830af81030552c86009268de4e532ba2ee2eab8247c6da0881'
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const SALT = '520f986b998545b4785e0defbc4f3c1203f22de2374a3d53cb7a7fe9fea309c5'
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const hexDecode = (hex) => Buffer.from(hex, 'hex')
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const sign = (salt, target, secret) => {
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const hmac = createHmac('sha256', hexDecode(secret))
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hmac.update(hexDecode(salt))
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hmac.update(target)
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return hmac.digest('base64url')
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}
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const path = "/rs:fit:300:300/plain/http://img.example.com/pretty/image.jpg"
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const signature = sign(SALT, path, KEY)
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const result = `/${signature}${path}`
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console.log(result)
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