Bump versions for next development cycle.

Procfile

@@ -1,2 +1,2 @@
-web: java -Dserver.port=$PORT $JAVA_OPTS -jar target/share-a-secret-api-1.0.3-SNAPSHOT.jar
+web: java -Dserver.port=$PORT $JAVA_OPTS -jar target/share-a-secret-api-1.4.0-SNAPSHOT.jar
 

pom.xml

@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>rs.in.zivanovic</groupId>
     <artifactId>share-a-secret-api</artifactId>
-    <version>1.0.3-SNAPSHOT</version>
+    <version>1.4.0-SNAPSHOT</version>
     <name>share-a-secret-api</name>
     <description>Share-a-Secret REST API service.</description>
 
@@ -44,6 +44,16 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
+        <dependency>
+            <groupId>rs.in.zivanovic</groupId>
+            <artifactId>sss</artifactId>
+            <version>1.0.0</version>
+        </dependency>
+        <dependency>
+            <groupId>net.glxn.qrgen</groupId>
+            <artifactId>javase</artifactId>
+            <version>2.0</version>
+        </dependency>
     </dependencies>
 
     <build>

src/main/java/rs/in/zivanovic/share/a/secret/api/ShamirSecretSharing.java

@@ -1,127 +0,0 @@
-/*
- * Copyright (c) 2014, Marko Zivanovic
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * * Redistributions of source code must retain the above copyright notice, this
- *   list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright notice,
- *   this list of conditions and the following disclaimer in the documentation
- *   and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package rs.in.zivanovic.share.a.secret.api;
-
-import rs.in.zivanovic.share.a.secret.api.dto.SecretShare;
-import java.math.BigInteger;
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- *
- * @author marko
- */
-public final class ShamirSecretSharing {
-
-    public static List<SecretShare> split(String secretString, int total, int threshold) {
-        BigInteger secret = Utils.encodeSecret(secretString);
-        return split(secret, total, threshold);
-    }
-
-    public static List<SecretShare> split(BigInteger secretNumber, int total, int threshold) {
-        BigInteger prime = Utils.getFirstPrimeGreaterThan(secretNumber);
-        BigInteger[] coeffs = Utils.generateRandomCoefficients(total, secretNumber, prime);
-        return split(secretNumber, coeffs, total, threshold, prime);
-    }
-
-    public static List<SecretShare> split(BigInteger secret, BigInteger[] coefficients, int total, int threshold,
-            BigInteger prime) {
-
-        if (secret.compareTo(BigInteger.ZERO) <= 0) {
-            throw new IllegalArgumentException("Secret must be positive integer");
-        }
-
-        if (prime.compareTo(secret) <= 0) {
-            throw new IllegalArgumentException("Prime must be greater than secret");
-        }
-
-        if (coefficients.length < threshold) {
-            throw new IllegalArgumentException("Not enough coefficients, need " + threshold + ", has " +
-                                               coefficients.length);
-        }
-
-        if (total < threshold) {
-            throw new IllegalArgumentException("Total number of shares must be greater than or equal threshold");
-        }
-
-        List<SecretShare> shares = new ArrayList<>();
-
-        for (int i = 1; i <= total; i++) {
-            BigInteger x = BigInteger.valueOf(i);
-            BigInteger v = coefficients[0];
-            for (int c = 1; c < threshold; c++) {
-                v = v.add(x.modPow(BigInteger.valueOf(c), prime).multiply(coefficients[c]).mod(prime)).mod(prime);
-            }
-            shares.add(new SecretShare(i, v, prime));
-        }
-        return shares;
-    }
-
-    public static String joinToUtf8String(List<SecretShare> shares) {
-        return Utils.decodeSecret(join(shares));
-    }
-
-    public static BigInteger join(List<SecretShare> shares) {
-        if (!checkSamePrimes(shares)) {
-            throw new IllegalArgumentException("Shares not from the same series");
-        }
-        BigInteger res = BigInteger.ZERO;
-        for (int i = 0; i < shares.size(); i++) {
-            BigInteger n = BigInteger.ONE;
-            BigInteger d = BigInteger.ONE;
-            BigInteger prime = shares.get(i).getPrime();
-            for (int j = 0; j < shares.size(); j++) {
-                if (i != j) {
-                    BigInteger sp = BigInteger.valueOf(shares.get(i).getN());
-                    BigInteger np = BigInteger.valueOf(shares.get(j).getN());
-                    n = n.multiply(np.negate()).mod(prime);
-                    d = d.multiply(sp.subtract(np)).mod(prime);
-                }
-            }
-            BigInteger v = shares.get(i).getShare();
-            res = res.add(prime).add(v.multiply(n).multiply(d.modInverse(prime))).mod(prime);
-        }
-        return res;
-    }
-
-    private static boolean checkSamePrimes(List<SecretShare> shares) {
-        boolean ret = true;
-        BigInteger prime = null;
-        for (SecretShare share : shares) {
-            if (prime == null) {
-                prime = share.getPrime();
-            } else if (!prime.equals(share.getPrime())) {
-                ret = false;
-                break;
-            }
-        }
-        return ret;
-    }
-
-    private ShamirSecretSharing() {
-    }
-
-}

src/main/java/rs/in/zivanovic/share/a/secret/api/Utils.java

@@ -1,149 +0,0 @@
-/*
- * Copyright (c) 2014, Marko Zivanovic
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * * Redistributions of source code must retain the above copyright notice, this
- *   list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright notice,
- *   this list of conditions and the following disclaimer in the documentation
- *   and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package rs.in.zivanovic.share.a.secret.api;
-
-import rs.in.zivanovic.share.a.secret.api.dto.SecretShare;
-import java.math.BigInteger;
-import java.nio.ByteBuffer;
-import java.nio.charset.StandardCharsets;
-import java.security.SecureRandom;
-import java.util.Arrays;
-import java.util.Random;
-
-/**
- *
- * @author marko
- */
-public final class Utils {
-
-    private static final Random RANDOM = new SecureRandom();
-    private static final byte[] SIGNATURE = "SS".getBytes(StandardCharsets.UTF_8);
-
-    public static BigInteger encodeSecret(String secret) {
-        byte[] bytes = secret.getBytes(StandardCharsets.UTF_8);
-        byte[] res;
-        if ((bytes[0] & 0b10000000) >> 7 == 1) {
-            res = new byte[bytes.length + 1];
-            res[0] = 0;
-            System.arraycopy(bytes, 0, res, 1, bytes.length);
-        } else {
-            res = bytes;
-        }
-        BigInteger r = new BigInteger(res);
-        assert r.compareTo(BigInteger.ZERO) > 0;
-        return r;
-    }
-
-    @SuppressWarnings("empty-statement")
-    public static String decodeSecret(BigInteger secret) {
-        byte[] bytes = secret.toByteArray();
-        int count;
-        for (count = 0; count < bytes.length && bytes[count] == 0; count++);
-        byte[] trimmed = new byte[bytes.length - count];
-        System.arraycopy(bytes, count, trimmed, 0, trimmed.length);
-        return new String(trimmed, StandardCharsets.UTF_8);
-    }
-
-    public static BigInteger getFirstPrimeGreaterThan(BigInteger secret) {
-        return secret.nextProbablePrime();
-    }
-
-    public static BigInteger getRandomPrimeGreaterThan(BigInteger prime) {
-        BigInteger res = BigInteger.ZERO;
-        while (res.compareTo(prime) <= 0) {
-            res = BigInteger.probablePrime(prime.bitLength(), RANDOM);
-        }
-        return res;
-    }
-
-    public static BigInteger getRandomLessThan(BigInteger prime) {
-        BigInteger r = null;
-        while (r == null || r.compareTo(prime) >= 0) {
-            r = new BigInteger(prime.bitLength(), RANDOM);
-        }
-        return r;
-    }
-
-    public static BigInteger[] generateRandomCoefficients(int n, BigInteger elementZero, BigInteger prime) {
-        BigInteger[] res = new BigInteger[n];
-        res[0] = elementZero;
-        for (int i = 1; i < n; i++) {
-            res[i] = Utils.getRandomLessThan(prime);
-        }
-        return res;
-    }
-
-    public static byte[] encodeToBinary(SecretShare share) {
-        assert share.getN() >= 0;
-        assert share.getN() <= 255;
-        byte[] shareData = share.getShare().toByteArray();
-        byte[] primeData = share.getPrime().toByteArray();
-        byte n = new Integer(share.getN()).byteValue();
-
-        int len = 9 + SIGNATURE.length + shareData.length + primeData.length;
-
-        ByteBuffer bb = ByteBuffer.allocate(len);
-        bb.put(SIGNATURE);
-        bb.put(n);
-        bb.putInt(shareData.length);
-        bb.put(shareData);
-        bb.putInt(primeData.length);
-        bb.put(primeData);
-
-        assert bb.position() == bb.capacity();
-        assert bb.hasArray();
-
-        return bb.array();
-    }
-
-    public static SecretShare decodeFromBinary(byte[] data) {
-        ByteBuffer bb = ByteBuffer.wrap(data);
-        byte[] signature = new byte[SIGNATURE.length];
-        bb.get(signature);
-        if (!Arrays.equals(SIGNATURE, signature)) {
-            throw new IllegalArgumentException("Invalid data");
-        }
-        byte n = bb.get();
-        int shareDataLen = bb.getInt();
-        byte[] shareData = new byte[shareDataLen];
-        bb.get(shareData);
-        int primeDataLen = bb.getInt();
-        byte[] primeData = new byte[primeDataLen];
-        bb.get(primeData);
-
-        assert bb.position() == bb.capacity();
-
-        BigInteger share = new BigInteger(shareData);
-        BigInteger prime = new BigInteger(primeData);
-        assert share.compareTo(BigInteger.ZERO) > 0;
-        assert prime.compareTo(BigInteger.ZERO) > 0;
-        return new SecretShare(n, share, prime);
-    }
-
-    private Utils() {
-    }
-
-}

src/main/java/rs/in/zivanovic/share/a/secret/api/controllers/AbstractSasController.java

@@ -0,0 +1,44 @@
+/*
+ * The MIT License
+ *
+ * Copyright 2014 Marko Zivanovic.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package rs.in.zivanovic.share.a.secret.api.controllers;
+
+import org.springframework.validation.BindingResult;
+import rs.in.zivanovic.share.a.secret.api.dto.SasResponse;
+
+/**
+ * Base class for our controllers. It contains common methods used across different controllers.
+ *
+ * @author Marko Zivanovic <marko@zivanovic.in.rs>
+ */
+public abstract class AbstractSasController {
+
+    protected SasResponse processValidationErrors(BindingResult br) {
+        SasResponse r = SasResponse.badRequest();
+        br.getFieldErrors().stream().forEach(err -> {
+            r.withInvalidParameterValueError(err.getField(), err.getRejectedValue(), err.getDefaultMessage());
+        });
+        return r;
+    }
+
+}

src/main/java/rs/in/zivanovic/share/a/secret/api/controllers/QrCodecController.java

@@ -0,0 +1,73 @@
+/*
+ * The MIT License
+ *
+ * Copyright 2014 Marko Zivanovic.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package rs.in.zivanovic.share.a.secret.api.controllers;
+
+import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
+import java.io.ByteArrayOutputStream;
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+import java.util.List;
+import net.glxn.qrgen.core.image.ImageType;
+import net.glxn.qrgen.javase.QRCode;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+import rs.in.zivanovic.share.a.secret.api.dto.SasResponse;
+
+/**
+ *
+ * @author Marko Zivanovic <marko@zivanovic.in.rs>
+ */
+@RestController
+@RequestMapping("/qr")
+public class QrCodecController extends AbstractSasController {
+
+    private static final List<Integer> VALID_SIZES = Arrays.asList(50, 100, 200, 250);
+
+    @RequestMapping(method = RequestMethod.GET, value = "/encode")
+    public ResponseEntity encode(
+            @RequestParam(value = "text", required = true) String text,
+            @RequestParam(value = "size", required = false, defaultValue = "250") int size,
+            @RequestParam(value = "ecl", required = false, defaultValue = "H") ErrorCorrectionLevel ecl) {
+        ResponseEntity response;
+        if (!VALID_SIZES.contains(size)) {
+            response = SasResponse.badRequest().
+                    withError(SasResponse.Error.INVALID_PARAMETER_VALUE,
+                            "Invalid QR code size, supported sizes: " + VALID_SIZES.toString()).build();
+        } else {
+            ByteArrayOutputStream baos = QRCode.from(text).to(ImageType.JPG).
+                    withSize(size, size).withCharset(StandardCharsets.US_ASCII.name()).
+                    withErrorCorrection(ecl).stream();
+            HttpHeaders headers = new HttpHeaders();
+            headers.add("Content-Type", "image/jpeg");
+            response = new ResponseEntity<>(baos.toByteArray(), headers, HttpStatus.OK);
+        }
+        return response;
+    }
+
+}

src/main/java/rs/in/zivanovic/share/a/secret/api/controllers/SasController.java

@@ -37,12 +37,12 @@ import rs.in.zivanovic.share.a.secret.api.dto.SplitResponse;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.RestController;
-import rs.in.zivanovic.share.a.secret.api.dto.SecretShare;
-import rs.in.zivanovic.share.a.secret.api.ShamirSecretSharing;
-import rs.in.zivanovic.share.a.secret.api.Utils;
 import rs.in.zivanovic.share.a.secret.api.dto.SasResponse;
 import rs.in.zivanovic.share.a.secret.api.dto.SplitParameters;
 import rs.in.zivanovic.share.a.secret.api.dto.VersionResponse;
+import rs.in.zivanovic.sss.SasUtils;
+import rs.in.zivanovic.sss.SecretShare;
+import rs.in.zivanovic.sss.ShamirSecretSharing;
 
 /**
  *
@@ -50,7 +50,7 @@ import rs.in.zivanovic.share.a.secret.api.dto.VersionResponse;
  */
 @RestController
 @RequestMapping("/sas")
-public class SasController {
+public class SasController extends AbstractSasController {
 
     @Value("${info.build.version:'<N/A>'}")
     private String version;
@@ -94,18 +94,10 @@ public class SasController {
         return SasResponse.ok().withData(new VersionResponse(version, buildTime)).build();
     }
 
-    private SasResponse processValidationErrors(BindingResult br) {
-        SasResponse r = SasResponse.badRequest();
-        br.getFieldErrors().stream().forEach(err -> {
-            r.withInvalidParameterValueError(err.getField(), err.getRejectedValue(), err.getDefaultMessage());
-        });
-        return r;
-    }
-
     private List<SecretShare> decodeSecretShares(JoinParameters params) {
         List<SecretShare> shares = new ArrayList<>(params.getShares().size());
         params.getShares().stream().forEach(share -> {
-            shares.add(Utils.decodeFromBinary(Base64.getDecoder().decode(share)));
+            shares.add(SasUtils.decodeFromBinary(Base64.getDecoder().decode(share)));
         });
         return shares;
     }

src/main/java/rs/in/zivanovic/share/a/secret/api/dto/SecretShare.java

@@ -1,94 +0,0 @@
-/*
- * Copyright (c) 2014, Marko Živanović
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * * Redistributions of source code must retain the above copyright notice, this
- *   list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright notice,
- *   this list of conditions and the following disclaimer in the documentation
- *   and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-package rs.in.zivanovic.share.a.secret.api.dto;
-
-import java.math.BigInteger;
-import java.util.Objects;
-
-/**
- *
- * @author marko
- */
-public final class SecretShare {
-
-    private final int n;
-    private final BigInteger share;
-    private final BigInteger prime;
-
-    public SecretShare(int n, BigInteger share, BigInteger prime) {
-        this.n = n;
-        this.share = share;
-        this.prime = prime;
-    }
-
-    public int getN() {
-        return n;
-    }
-
-    public BigInteger getShare() {
-        return share;
-    }
-
-    public BigInteger getPrime() {
-        return prime;
-    }
-
-    @Override
-    public int hashCode() {
-        int hash = 7;
-        hash = 79 * hash + this.n;
-        hash = 79 * hash + Objects.hashCode(this.share);
-        hash = 79 * hash + Objects.hashCode(this.prime);
-        return hash;
-    }
-
-    @Override
-    public boolean equals(Object obj) {
-        if (obj == null) {
-            return false;
-        }
-        if (getClass() != obj.getClass()) {
-            return false;
-        }
-        final SecretShare other = (SecretShare) obj;
-        if (this.n != other.n) {
-            return false;
-        }
-        if (!Objects.equals(this.share, other.share)) {
-            return false;
-        }
-        if (!Objects.equals(this.prime, other.prime)) {
-            return false;
-        }
-        return true;
-    }
-
-    @Override
-    public String toString() {
-        return "SecretShare{" + "n=" + n + ", share=" + share + ", prime=" + prime + '}';
-    }
-
-}

src/main/java/rs/in/zivanovic/share/a/secret/api/dto/SplitResponse.java

@@ -24,9 +24,10 @@
 package rs.in.zivanovic.share.a.secret.api.dto;
 
 import java.util.ArrayList;
+import java.util.Base64;
 import java.util.List;
-import org.apache.tomcat.util.codec.binary.Base64;
-import rs.in.zivanovic.share.a.secret.api.Utils;
+import rs.in.zivanovic.sss.SasUtils;
+import rs.in.zivanovic.sss.SecretShare;
 
 /**
  *
@@ -39,7 +40,7 @@ public class SplitResponse {
     public SplitResponse(List<SecretShare> shares) {
         this.shares.clear();
         shares.stream().forEachOrdered(share -> {
-            this.shares.add(Base64.encodeBase64String(Utils.encodeToBinary(share)));
+            this.shares.add(Base64.getUrlEncoder().encodeToString(SasUtils.encodeToBinary(share)));
         });
     }
 

src/main/resources/static/js/services.js

@@ -22,21 +22,22 @@
  * THE SOFTWARE.
  */
 
-var API_BASE = "https://share-a-secret-api.herokuapp.com/sas";
+//var API_BASE = "https://share-a-secret-api.herokuapp.com";
+var API_BASE = "http://localhost:8080";
 
 angular.module('sasServices', []).
         factory('SasService', ['$resource', function ($resource) {
                 return $resource(API_BASE, {}, {
                     split: {
-                        url: API_BASE + "/split",
+                        url: API_BASE + "/sas/split",
                         method: "POST"
                     },
                     join: {
-                        url: API_BASE + "/join",
+                        url: API_BASE + "/sas/join",
                         method: "POST"
                     },
                     version: {
-                        url: API_BASE + "/version",
+                        url: API_BASE + "/sas/version",
                         method: "GET"
                     }
                 });

src/main/resources/static/split.html

@@ -32,10 +32,10 @@
     </div>
 
     <div class="row" ng-show="shares.length">
-        <div class="row">
-            <hr/>
-            <h1>Here are your secret shares ...</h1>
-        </div>
+        <!--<hr/>-->
+        <h1>Here are your secret shares ...</h1>
+        <!--        <div class="row">
+                </div>-->
 
         <tabset>
             <tab>
@@ -59,6 +59,19 @@
                     </div>
                 </div>
             </tab>
+            <tab>
+                <tab-heading><i class="glyphicon glyphicon-qrcode"></i> QR codes</tab-heading>
+                <div class="panel panel-default">
+                    <div class="panel-body">
+                        <p class="text-muted">Use QR encoded shares for easy scanning into mobile devices.</p>
+                        <div class="row">
+                            <div ng-repeat="share in shares">
+                                <div class="col-md-2"><img ng-src="/qr/encode?text={{share}}&size=200&ecl=M"/></div>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+            </tab>
         </tabset>
     </div>
 </div>