51 lines
1.8 KiB
Swift
51 lines
1.8 KiB
Swift
// Copyright © 2022 Rangeproof Pty Ltd. All rights reserved.
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import Foundation
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import Sodium
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import Curve25519Kit
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public struct SessionId {
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public enum Prefix: String, CaseIterable {
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case standard = "05" // Used for identified users, open groups, etc.
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case blinded = "15" // Used for authentication and participants in open groups with blinding enabled
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case unblinded = "00" // Used for authentication in open groups with blinding disabled
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public init?(from stringValue: String?) {
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guard let stringValue: String = stringValue else { return nil }
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guard stringValue.count > 2 else {
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guard let targetPrefix: Prefix = Prefix(rawValue: stringValue) else { return nil }
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self = targetPrefix
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return
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}
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guard ECKeyPair.isValidHexEncodedPublicKey(candidate: stringValue) else { return nil }
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guard let targetPrefix: Prefix = Prefix(rawValue: String(stringValue.prefix(2))) else { return nil }
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self = targetPrefix
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}
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}
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public let prefix: Prefix
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public let publicKey: String
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public var hexString: String {
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return prefix.rawValue + publicKey
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}
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// MARK: - Initialization
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public init?(from idString: String?) {
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guard let idString: String = idString, idString.count > 2 else { return nil }
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guard let targetPrefix: Prefix = Prefix(from: idString) else { return nil }
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self.prefix = targetPrefix
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self.publicKey = idString.substring(from: 2)
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}
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public init(_ type: Prefix, publicKey: Bytes) {
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self.prefix = type
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self.publicKey = publicKey.map { String(format: "%02hhx", $0) }.joined()
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}
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}
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