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Crypto: Swift wrapper for the Curve25519 C code 

Signed-off-by: Roopesh Chander <roop@roopc.net>
This commit is contained in:
Roopesh Chander 2018-10-24 11:56:18 +05:30
parent 5bfb6a2c13
commit c689be7eff
2 changed files with 31 additions and 0 deletions
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4
WireGuard/WireGuard.xcodeproj/project.pbxproj
View File

@ -11,6 +11,7 @@
6F628C3F217F3413003482A3 /* DNSServer.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F628C3E217F3413003482A3 /* DNSServer.swift */; };
6F628C41217F47DB003482A3 /* TunnelDetailTableViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F628C40217F47DB003482A3 /* TunnelDetailTableViewController.swift */; };
6F6899A62180447E0012E523 /* x25519.c in Sources */ = {isa = PBXBuildFile; fileRef = 6F6899A52180447E0012E523 /* x25519.c */; };
6F6899A8218044FC0012E523 /* Curve25519.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F6899A7218044FC0012E523 /* Curve25519.swift */; };
6F693A562179E556008551C1 /* Endpoint.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F693A552179E556008551C1 /* Endpoint.swift */; };
6F7774E1217181B1006A79B3 /* MainViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F7774DF217181B1006A79B3 /* MainViewController.swift */; };
6F7774E2217181B1006A79B3 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F7774E0217181B1006A79B3 /* AppDelegate.swift */; };
@ -31,6 +32,7 @@
6F689999218043390012E523 /* WireGuard-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "WireGuard-Bridging-Header.h"; sourceTree = "<group>"; };
6F6899A42180447E0012E523 /* x25519.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = x25519.h; sourceTree = "<group>"; };
6F6899A52180447E0012E523 /* x25519.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = x25519.c; sourceTree = "<group>"; };
6F6899A7218044FC0012E523 /* Curve25519.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Curve25519.swift; sourceTree = "<group>"; };
6F693A552179E556008551C1 /* Endpoint.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Endpoint.swift; sourceTree = "<group>"; };
6F7774DF217181B1006A79B3 /* MainViewController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = MainViewController.swift; sourceTree = "<group>"; };
6F7774E0217181B1006A79B3 /* AppDelegate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
@ -65,6 +67,7 @@
children = (
6F6899A52180447E0012E523 /* x25519.c */,
6F6899A42180447E0012E523 /* x25519.h */,
6F6899A7218044FC0012E523 /* Curve25519.swift */,
);
path = Crypto;
sourceTree = "<group>";
@ -236,6 +239,7 @@
6F628C3D217F09E9003482A3 /* TunnelViewModel.swift in Sources */,
6F7774EA217229DB006A79B3 /* IPAddressRange.swift in Sources */,
6F7774E82172020C006A79B3 /* Configuration.swift in Sources */,
6F6899A8218044FC0012E523 /* Curve25519.swift in Sources */,
6F628C41217F47DB003482A3 /* TunnelDetailTableViewController.swift in Sources */,
6F7774F321774263006A79B3 /* TunnelEditTableViewController.swift in Sources */,
6F7774E1217181B1006A79B3 /* MainViewController.swift in Sources */,

27
WireGuard/WireGuard/Crypto/Curve25519.swift Normal file
View File

@ -0,0 +1,27 @@
// SPDX-License-Identifier: MIT
// Copyright © 2018 WireGuard LLC. All rights reserved.
import UIKit
struct Curve25519 {
static func generatePrivateKey() -> Data {
var privateKey = Data(repeating: 0, count: 32)
privateKey.withUnsafeMutableBytes { (bytes: UnsafeMutablePointer<UInt8>) in
curve25519_generate_private_key(bytes)
}
assert(privateKey.count == 32)
return privateKey
}
static func generatePublicKey(fromPrivateKey privateKey: Data) -> Data {
assert(privateKey.count == 32)
var publicKey = Data(repeating: 0, count: 32)
privateKey.withUnsafeBytes { (privateKeyBytes: UnsafePointer<UInt8>) in
publicKey.withUnsafeMutableBytes { (bytes: UnsafeMutablePointer<UInt8>) in
curve25519_derive_public_key(bytes, privateKeyBytes)
}
}
assert(publicKey.count == 32)
return publicKey
}
}