如何在Swift中解码JWT(JSON Web令牌)令牌？

然后导入库导入JWTDecode并执行.

let jwt = try decode(jwt: token)

由于您不想包含此库,因此我提供了所需的部件以使其工作.

func decode(jwtToken jwt: String) -> [String: Any] {
  let segments = jwt.components(separatedBy: ".")
  return decodeJWTPart(segments[1]) ?? [:]
}

func base64UrlDecode(_ value: String) -> Data? {
  var base64 = value
    .replacingoccurrences(of: "-",with: "+")
    .replacingoccurrences(of: "_",with: "/")

  let length = Double(base64.lengthOfBytes(using: String.Encoding.utf8))
  let requiredLength = 4 * ceil(length / 4.0)
  let paddingLength = requiredLength - length
  if paddingLength > 0 {
    let padding = "".padding(toLength: Int(paddingLength),withPad: "=",starTingAt: 0)
    base64 = base64 + padding
  }
  return Data(base64Encoded: base64,options: .ignoreUnkNownCharacters)
}

func decodeJWTPart(_ value: String) -> [String: Any]? {
  guard let bodyData = base64UrlDecode(value),let json = try? JSONserialization.jsonObject(with: bodyData,options: []),let payload = json as? [String: Any] else {
      return nil
  }

  return payload
}

像这样称呼它：

decode(jwtToken: TOKEN)