--- a/app/src/main/java/com/isode/stroke/sasl/SCRAMSHA1ClientAuthenticator.java	Sun Mar 15 21:08:23 2015 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,199 +0,0 @@
-/*
- * Copyright (c) 2010, Isode Limited, London, England.
- * All rights reserved.
- */
-/*
- * Copyright (c) 2010, Remko Tronçon.
- * All rights reserved.
- */
-package com.isode.stroke.sasl;
-
-import com.isode.stroke.base.ByteArray;
-import com.isode.stroke.stringcodecs.Base64;
-import com.isode.stroke.stringcodecs.HMACSHA1;
-import com.isode.stroke.stringcodecs.PBKDF2;
-import com.isode.stroke.stringcodecs.SHA1;
-import java.text.Normalizer;
-import java.text.Normalizer.Form;
-import java.util.HashMap;
-import java.util.Map;
-
-public class SCRAMSHA1ClientAuthenticator extends ClientAuthenticator {
-
-    static String escape(String s) {
-        String result = "";
-        for (int i = 0; i < s.length(); ++i) {
-            if (s.charAt(i) == ',') {
-                result += "=2C";
-            } else if (s.charAt(i) == '=') {
-                result += "=3D";
-            } else {
-                result += s.charAt(i);
-            }
-        }
-        return result;
-    }
-
-    public SCRAMSHA1ClientAuthenticator(String nonce) {
-        this(nonce, false);
-    }
-    public SCRAMSHA1ClientAuthenticator(String nonce, boolean useChannelBinding) {
-        super(useChannelBinding ? "SCRAM-SHA-1-PLUS" : "SCRAM-SHA-1");
-        step = Step.Initial;
-        clientnonce = nonce;
-        this.useChannelBinding = useChannelBinding;
-    }
-
-    public void setTLSChannelBindingData(ByteArray channelBindingData) {
-        tlsChannelBindingData = channelBindingData;
-    }
-
-    public ByteArray getResponse() {
-        if (step.equals(Step.Initial)) {
-            return ByteArray.plus(getGS2Header(), getInitialBareClientMessage());
-        } else if (step.equals(Step.Proof)) {
-            ByteArray clientKey = HMACSHA1.getResult(saltedPassword, new ByteArray("Client Key"));
-            ByteArray storedKey = SHA1.getHash(clientKey);
-            ByteArray clientSignature = HMACSHA1.getResult(storedKey, authMessage);
-            ByteArray clientProof = clientKey;
-            byte[] clientProofData = clientProof.getData();
-            for (int i = 0; i < clientProofData.length; ++i) {
-                clientProofData[i] ^= clientSignature.getData()[i];
-            }
-            ByteArray result = getFinalMessageWithoutProof().append(",p=").append(Base64.encode(clientProof));
-            return result;
-        } else {
-            return null;
-        }
-    }
-
-    public boolean setChallenge(ByteArray challenge) {
-        if (step.equals(Step.Initial)) {
-            if (challenge == null) {
-                return false;
-            }
-            initialServerMessage = challenge;
-
-            Map<Character, String> keys = parseMap(initialServerMessage.toString());
-
-            // Extract the salt
-            ByteArray salt = Base64.decode(keys.get('s'));
-
-            // Extract the server nonce
-            String clientServerNonce = keys.get('r');
-            if (clientServerNonce.length() <= clientnonce.length()) {
-                return false;
-            }
-            String receivedClientNonce = clientServerNonce.substring(0, clientnonce.length());
-            if (!receivedClientNonce.equals(clientnonce)) {
-                return false;
-            }
-            serverNonce = new ByteArray(clientServerNonce.substring(clientnonce.length()));
-
-
-            // Extract the number of iterations
-            int iterations = 0;
-            try {
-                iterations = Integer.parseInt(keys.get('i'));
-            } catch (NumberFormatException e) {
-                return false;
-            }
-            if (iterations <= 0) {
-                return false;
-            }
-
-            ByteArray channelBindData = new ByteArray();
-            if (useChannelBinding && tlsChannelBindingData != null) {
-                channelBindData = tlsChannelBindingData;
-            }
-
-            // Compute all the values needed for the server signature
-            saltedPassword = PBKDF2.encode(new ByteArray(SASLPrep(getPassword())), salt, iterations);
-            authMessage = getInitialBareClientMessage().append(",").append(initialServerMessage).append(",").append(getFinalMessageWithoutProof());
-            ByteArray serverKey = HMACSHA1.getResult(saltedPassword, new ByteArray("Server Key"));
-            serverSignature = HMACSHA1.getResult(serverKey, authMessage);
-
-            step = Step.Proof;
-            return true;
-        } else if (step.equals(step.Proof)) {
-            ByteArray result = new ByteArray("v=").append(new ByteArray(Base64.encode(serverSignature)));
-            step = Step.Final;
-            return challenge != null && challenge.equals(result);
-        } else {
-            return true;
-        }
-    }
-
-    private String SASLPrep(String source) {
-        return Normalizer.normalize(source, Form.NFKC); /* FIXME: Implement real SASLPrep */
-    }
-
-    private Map<Character, String> parseMap(String s) {
-        HashMap<Character, String> result = new HashMap<Character, String>();
-        if (s.length() > 0) {
-            char key = '~'; /* initialise so it'll compile */
-            String value = "";
-            int i = 0;
-            boolean expectKey = true;
-            while (i < s.length()) {
-                if (expectKey) {
-                    key = s.charAt(i);
-                    expectKey = false;
-                    i++;
-                } else if (s.charAt(i) == ',') {
-                    result.put(key, value);
-                    value = "";
-                    expectKey = true;
-                } else {
-                    value += s.charAt(i);
-                }
-                i++;
-            }
-            result.put(key, value);
-        }
-        return result;
-    }
-
-    private ByteArray getInitialBareClientMessage() {
-        String authenticationID = SASLPrep(getAuthenticationID());
-        return new ByteArray("n=" + escape(authenticationID) + ",r=" + clientnonce);
-    }
-
-    private ByteArray getGS2Header() {
-
-        ByteArray channelBindingHeader = new ByteArray("n");
-	if (tlsChannelBindingData != null) {
-		if (useChannelBinding) {
-			channelBindingHeader = new ByteArray("p=tls-unique");
-		}
-		else {
-			channelBindingHeader = new ByteArray("y");
-		}
-	}
-	return new ByteArray().append(channelBindingHeader).append(",").append(getAuthorizationID().isEmpty() ? new ByteArray() : new ByteArray("a=" + escape(getAuthorizationID()))).append(",");
-    }
-
-    private ByteArray getFinalMessageWithoutProof() {
-        ByteArray channelBindData = new ByteArray();
-	if (useChannelBinding && tlsChannelBindingData != null) {
-		channelBindData = tlsChannelBindingData;
-	}
-	return new ByteArray("c=" + Base64.encode(new ByteArray(getGS2Header()).append(channelBindData)) + ",r=" + clientnonce).append(serverNonce);
-    }
-
-    private enum Step {
-
-        Initial,
-        Proof,
-        Final
-    };
-    private Step step;
-    private String clientnonce = "";
-    private ByteArray initialServerMessage = new ByteArray();
-    private ByteArray serverNonce = new ByteArray();
-    private ByteArray authMessage = new ByteArray();
-    private ByteArray saltedPassword = new ByteArray();
-    private ByteArray serverSignature = new ByteArray();
-    private boolean useChannelBinding;
-    private ByteArray tlsChannelBindingData;
-}