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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
import Foundation
/// The Device Session JWT (DSJ) issued by the backend on successful App Attest enrollment.
public struct VPNDeviceSession: Codable, Equatable, Sendable {
public let deviceSessionJwt: String
public let expiresAtMilliseconds: Int64
public let renewAfterMilliseconds: Int64
// Also the keychain storage format, so these names are the backend's, not ours to rename.
private enum CodingKeys: String, CodingKey {
case deviceSessionJwt = "deviceSessionJwt"
case expiresAtMilliseconds = "expiresAt"
case renewAfterMilliseconds = "renewAfter"
}
public init(deviceSessionJwt: String, expiresAtMilliseconds: Int64, renewAfterMilliseconds: Int64) {
self.deviceSessionJwt = deviceSessionJwt
self.expiresAtMilliseconds = expiresAtMilliseconds
self.renewAfterMilliseconds = renewAfterMilliseconds
}
public func isValid(now: Date = Date()) -> Bool {
return now.millisecondsSince1970 < expiresAtMilliseconds
}
/// Past the renewal window: still valid, but a refresh is due.
public func needsRenewal(now: Date = Date()) -> Bool {
return now.millisecondsSince1970 >= renewAfterMilliseconds
}
}
private extension Date {
var millisecondsSince1970: Int64 {
return Int64(timeIntervalSince1970 * 1000)
}
}