You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
session-ios/SessionSnodeKit/Models/SendMessageRequest.swift

77 lines
3.1 KiB
Swift

// Copyright © 2022 Rangeproof Pty Ltd. All rights reserved.
import Foundation
extension SnodeAPI {
public class SendMessageRequest: SnodeAuthenticatedRequestBody {
enum CodingKeys: String, CodingKey {
case namespace
}
let message: SnodeMessage
let namespace: SnodeAPI.Namespace
// MARK: - Init
public init(
message: SnodeMessage,
namespace: SnodeAPI.Namespace,
subkey: String?,
timestampMs: UInt64,
ed25519PublicKey: [UInt8],
ed25519SecretKey: [UInt8]
) {
self.message = message
self.namespace = namespace
super.init(
pubkey: message.recipient,
ed25519PublicKey: ed25519PublicKey,
ed25519SecretKey: ed25519SecretKey,
subkey: subkey,
timestampMs: timestampMs
)
}
// MARK: - Coding
override public func encode(to encoder: Encoder) throws {
var container: KeyedEncodingContainer<CodingKeys> = encoder.container(keyedBy: CodingKeys.self)
/// **Note:** We **MUST** do the `message.encode` before we call `super.encode` because otherwise
/// it will override the `timestampMs` value with the value in the message which is incorrect - we actually want the
/// `timestampMs` value at the time the request was made so that older messages stuck in the job queue don't
/// end up failing due to being outside the approved timestamp window (clients use the timestamp within the message
/// data rather than this one anyway)
try message.encode(to: encoder)
try container.encode(namespace, forKey: .namespace)
try super.encode(to: encoder)
}
// MARK: - Abstract Methods
override func generateSignature() throws -> [UInt8] {
/// Ed25519 signature of `("store" || namespace || timestamp)`, where namespace and
/// `timestamp` are the base10 expression of the namespace and `timestamp` values. Must be
/// base64 encoded for json requests; binary for OMQ requests. For non-05 type pubkeys (i.e. non
/// session ids) the signature will be verified using `pubkey`. For 05 pubkeys, see the following
/// option.
let verificationBytes: [UInt8] = SnodeAPI.Endpoint.sendMessage.rawValue.bytes
.appending(contentsOf: namespace.verificationString.bytes)
.appending(contentsOf: timestampMs.map { "\($0)" }?.data(using: .ascii)?.bytes)
guard
let signatureBytes: [UInt8] = sodium.wrappedValue.sign.signature(
message: verificationBytes,
secretKey: ed25519SecretKey
)
else {
throw SnodeAPIError.signingFailed
}
return signatureBytes
}
}
}