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https://github.com/danbulant/jose
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20 lines
426 B
JavaScript
20 lines
426 B
JavaScript
const { randomBytes } = require('crypto')
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const IVLENGTHS = {
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'A128CBC-HS256': 128 / 8,
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'A192CBC-HS384': 128 / 8,
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'A256CBC-HS512': 128 / 8,
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'A128GCM': 96 / 8,
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'A192GCM': 96 / 8,
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'A256GCM': 96 / 8
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}
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module.exports = (alg) => {
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const byteLength = IVLENGTHS[alg]
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if (byteLength === undefined) {
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throw new TypeError('unsupported intended content encryption key alg')
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}
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return randomBytes(byteLength)
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}
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