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x/jose/jwe/compact/decrypt.ts

"JSON Web Almost Everything" - JWA, JWS, JWE, JWT, JWK, JWKS for Node.js, Browser, Cloudflare Workers, Deno, Bun, and other Web-interoperable runtimes.
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import { flattenedDecrypt } from '../flattened/decrypt.ts'import { JWEInvalid } from '../../util/errors.ts'import { decoder } from '../../lib/buffer_utils.ts'import type { KeyLike, DecryptOptions, CompactJWEHeaderParameters, GetKeyFunction, FlattenedJWE, CompactDecryptResult, ResolvedKey,} from '../../types.d.ts'
/** * Interface for Compact JWE Decryption dynamic key resolution. No token components have been * verified at the time of this function call. */export interface CompactDecryptGetKey extends GetKeyFunction<CompactJWEHeaderParameters, FlattenedJWE> {}
/** * Decrypts a Compact JWE. * * @param jwe Compact JWE. * @param key Private Key or Secret to decrypt the JWE with. See * {@link https://github.com/panva/jose/issues/210#jwe-alg Algorithm Key Requirements}. * @param options JWE Decryption options. */export async function compactDecrypt( jwe: string | Uint8Array, key: KeyLike | Uint8Array, options?: DecryptOptions,): Promise<CompactDecryptResult>/** * @param jwe Compact JWE. * @param getKey Function resolving Private Key or Secret to decrypt the JWE with. See * {@link https://github.com/panva/jose/issues/210#jwe-alg Algorithm Key Requirements}. * @param options JWE Decryption options. */export async function compactDecrypt<T extends KeyLike = KeyLike>( jwe: string | Uint8Array, getKey: CompactDecryptGetKey, options?: DecryptOptions,): Promise<CompactDecryptResult & ResolvedKey<T>>export async function compactDecrypt( jwe: string | Uint8Array, key: KeyLike | Uint8Array | CompactDecryptGetKey, options?: DecryptOptions,) { if (jwe instanceof Uint8Array) { jwe = decoder.decode(jwe) }
if (typeof jwe !== 'string') { throw new JWEInvalid('Compact JWE must be a string or Uint8Array') } const { 0: protectedHeader, 1: encryptedKey, 2: iv, 3: ciphertext, 4: tag, length, } = jwe.split('.')
if (length !== 5) { throw new JWEInvalid('Invalid Compact JWE') }
const decrypted = await flattenedDecrypt( { ciphertext, iv: <string>(iv || undefined), protected: protectedHeader || undefined, tag: <string>(tag || undefined), encrypted_key: encryptedKey || undefined, }, <Parameters<typeof flattenedDecrypt>[1]>key, options, )
const result = { plaintext: decrypted.plaintext, protectedHeader: decrypted.protectedHeader! }
if (typeof key === 'function') { return { ...result, key: decrypted.key } }
return result}