Made SRPClient.calculateSharedSecret, SRP.calculateU public

Author: adam-fowler

Sources/SRP/client.swift

@@ -58,7 +58,7 @@ public struct SRPClient<H: HashFunction> {
     ///   - serverPublicKey: server public key
     /// - Throws: `nullServerKey`
     /// - Returns: shared secret
-    func calculateSharedSecret(username: String, password: String, salt: [UInt8], clientKeys: SRPKeyPair, serverPublicKey: SRPKey) throws -> SRPKey {
+    public func calculateSharedSecret(username: String, password: String, salt: [UInt8], clientKeys: SRPKeyPair, serverPublicKey: SRPKey) throws -> SRPKey {
         let message = [UInt8]("\(username):\(password)".utf8)
         let sharedSecret = try calculateSharedSecret(message: message, salt: salt, clientKeys: clientKeys, serverPublicKey: serverPublicKey)
         return SRPKey(sharedSecret)

Sources/SRP/srp.swift

@@ -2,7 +2,7 @@ import BigNum
 import Crypto
 
 /// Contains common code used by both client and server SRP code
-struct SRP<H: HashFunction> {
+public struct SRP<H: HashFunction> {
 
     /// pad to a certain size by prefixing with zeros
     static func pad(_ data: [UInt8], to size: Int) -> [UInt8] {
@@ -14,7 +14,7 @@ struct SRP<H: HashFunction> {
     }
 
     /// calculate u = H(clientPublicKey | serverPublicKey)
-    static func calculateU(clientPublicKey: [UInt8], serverPublicKey: [UInt8], pad: Int) -> BigNum {
+    public static func calculateU(clientPublicKey: [UInt8], serverPublicKey: [UInt8], pad: Int) -> BigNum {
         BigNum(bytes: [UInt8].init(H.hash(data: SRP<H>.pad(clientPublicKey, to: pad) + SRP<H>.pad(serverPublicKey, to: pad))))
     }