30 lines
1.0 KiB
JavaScript
30 lines
1.0 KiB
JavaScript
const { createSign, createVerify } = require('crypto')
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const { KEYOBJECT } = require('../help/consts')
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const resolveNodeAlg = require('../help/node_alg')
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const { asInput } = require('../help/key_object')
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const sign = (nodeAlg, { [KEYOBJECT]: keyObject }, payload) => {
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return createSign(nodeAlg).update(payload).sign(asInput(keyObject, false))
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}
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const verify = (nodeAlg, { [KEYOBJECT]: keyObject }, payload, signature) => {
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return createVerify(nodeAlg).update(payload).verify(asInput(keyObject, true), signature)
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}
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const LENGTHS = {
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RS256: 0,
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RS384: 624,
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RS512: 752
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}
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module.exports = (JWA, JWK) => {
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['RS256', 'RS384', 'RS512'].forEach((jwaAlg) => {
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const nodeAlg = resolveNodeAlg(jwaAlg)
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JWA.sign.set(jwaAlg, sign.bind(undefined, nodeAlg))
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JWA.verify.set(jwaAlg, verify.bind(undefined, nodeAlg))
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JWK.RSA.sign[jwaAlg] = key => key.private && JWK.RSA.verify[jwaAlg](key)
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JWK.RSA.verify[jwaAlg] = key => (key.use === 'sig' || key.use === undefined) && key.length >= LENGTHS[jwaAlg]
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})
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}
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