Hailey
98 lines
2.2 KiB
TypeScript
98 lines
2.2 KiB
TypeScript
import { Jwk } from './jwk.js'
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declare const process: undefined | { versions?: { node?: string } }
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const IS_NODE_RUNTIME =
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typeof process !== 'undefined' && typeof process?.versions?.node === 'string'
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export function* jwkAlgorithms(jwk: Jwk): Generator<string> {
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// Ed25519, Ed448, and secp256k1 always have "alg"
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// OKP always has "use"
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if (jwk.alg) {
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yield jwk.alg
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return
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}
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switch (jwk.kty) {
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case 'EC': {
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if (jwk.use === 'enc' || jwk.use === undefined) {
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yield 'ECDH-ES'
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yield 'ECDH-ES+A128KW'
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yield 'ECDH-ES+A192KW'
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yield 'ECDH-ES+A256KW'
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}
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if (jwk.use === 'sig' || jwk.use === undefined) {
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const crv = 'crv' in jwk ? jwk.crv : undefined
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switch (crv) {
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case 'P-256':
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case 'P-384':
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yield `ES${crv.slice(-3)}`.replace('21', '12')
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break
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case 'P-521':
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yield 'ES512'
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break
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case 'secp256k1':
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if (IS_NODE_RUNTIME) yield 'ES256K'
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break
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default:
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throw new TypeError(`Unsupported crv "${crv}"`)
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}
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}
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return
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}
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case 'OKP': {
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if (!jwk.use) throw new TypeError('Missing "use" Parameter value')
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yield 'ECDH-ES'
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yield 'ECDH-ES+A128KW'
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yield 'ECDH-ES+A192KW'
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yield 'ECDH-ES+A256KW'
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return
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}
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case 'RSA': {
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if (jwk.use === 'enc' || jwk.use === undefined) {
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yield 'RSA-OAEP'
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yield 'RSA-OAEP-256'
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yield 'RSA-OAEP-384'
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yield 'RSA-OAEP-512'
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if (IS_NODE_RUNTIME) yield 'RSA1_5'
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}
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if (jwk.use === 'sig' || jwk.use === undefined) {
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yield 'PS256'
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yield 'PS384'
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yield 'PS512'
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yield 'RS256'
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yield 'RS384'
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yield 'RS512'
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}
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return
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}
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case 'oct': {
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if (jwk.use === 'enc' || jwk.use === undefined) {
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yield 'A128GCMKW'
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yield 'A192GCMKW'
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yield 'A256GCMKW'
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yield 'A128KW'
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yield 'A192KW'
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yield 'A256KW'
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}
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if (jwk.use === 'sig' || jwk.use === undefined) {
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yield 'HS256'
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yield 'HS384'
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yield 'HS512'
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}
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return
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}
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default:
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throw new Error(`Unsupported kty "${jwk.kty}"`)
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}
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}
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