michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.background.fxa;
michael@0: 
michael@0: import java.io.UnsupportedEncodingException;
michael@0: import java.math.BigInteger;
michael@0: import java.security.NoSuchAlgorithmException;
michael@0: 
michael@0: import org.json.simple.JSONObject;
michael@0: import org.mozilla.gecko.background.fxa.FxAccountClient10.CreateDelegate;
michael@0: import org.mozilla.gecko.sync.Utils;
michael@0: import org.mozilla.gecko.sync.net.SRPConstants;
michael@0: 
michael@0: public class FxAccount10CreateDelegate implements CreateDelegate {
michael@0:   protected final String     email;
michael@0:   protected final String     mainSalt;
michael@0:   protected final String     srpSalt;
michael@0:   protected final BigInteger v;
michael@0: 
michael@0:   public FxAccount10CreateDelegate(String email, byte[] stretchedPWBytes, String mainSalt, String srpSalt) throws NoSuchAlgorithmException, UnsupportedEncodingException {
michael@0:     this.email = email;
michael@0:     this.mainSalt = mainSalt;
michael@0:     this.srpSalt = srpSalt;
michael@0:     byte[] srpSaltBytes = Utils.hex2Byte(srpSalt, FxAccountUtils.SALT_LENGTH_BYTES);
michael@0:     this.v = FxAccountUtils.srpVerifierLowercaseV(email.getBytes("UTF-8"), stretchedPWBytes, srpSaltBytes, SRPConstants._2048.g, SRPConstants._2048.N);
michael@0:   }
michael@0: 
michael@0:   @SuppressWarnings("unchecked")
michael@0:   @Override
michael@0:   public JSONObject getCreateBody() throws FxAccountClientException {
michael@0:     final JSONObject body = new JSONObject();
michael@0:     try {
michael@0:       body.put("email", FxAccountUtils.bytes(email));
michael@0:     } catch (UnsupportedEncodingException e) {
michael@0:       throw new FxAccountClientException(e);
michael@0:     }
michael@0: 
michael@0:     final JSONObject stretching = new JSONObject();
michael@0:     stretching.put("type", "PBKDF2/scrypt/PBKDF2/v1");
michael@0:     stretching.put("PBKDF2_rounds_1", 20000);
michael@0:     stretching.put("scrypt_N", 65536);
michael@0:     stretching.put("scrypt_r", 8);
michael@0:     stretching.put("scrypt_p", 1);
michael@0:     stretching.put("PBKDF2_rounds_2", 20000);
michael@0:     stretching.put("salt", mainSalt);
michael@0:     body.put("passwordStretching", stretching);
michael@0: 
michael@0:     final JSONObject srp = new JSONObject();
michael@0:     srp.put("type", "SRP-6a/SHA256/2048/v1");
michael@0:     srp.put("verifier", FxAccountUtils.hexModN(v, SRPConstants._2048.N));
michael@0:     srp.put("salt", srpSalt);
michael@0:     body.put("srp", srp);
michael@0:     return body;
michael@0:   }
michael@0: }