diff --git a/pom.xml b/pom.xml index e0131f5..d6b67f6 100644 --- a/pom.xml +++ b/pom.xml @@ -40,6 +40,11 @@ 4.10 test + + rs.in.zivanovic + sss + 1.0.0 + @@ -47,7 +52,7 @@ com.github.wvengen proguard-maven-plugin - 2.0.6 + 2.0.8 package @@ -69,7 +74,7 @@ net.sf.proguard proguard-base - 4.9 + 5.1 @@ -87,5 +92,16 @@ + + + src/main/resources + false + + + src/main/resources-filtered + true + + + diff --git a/src/main/java/rs/in/zivanovic/share/a/secret/Main.java b/src/main/java/rs/in/zivanovic/share/a/secret/Main.java index 663651f..1452a33 100644 --- a/src/main/java/rs/in/zivanovic/share/a/secret/Main.java +++ b/src/main/java/rs/in/zivanovic/share/a/secret/Main.java @@ -1,5 +1,5 @@ /* - * Copyright (c) 2014, Marko Živanović + * Copyright (c) 2014, Marko Zivanovic * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -30,6 +30,11 @@ import java.io.IOException; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.List; +import java.util.MissingResourceException; +import java.util.ResourceBundle; +import rs.in.zivanovic.sss.SasUtils; +import rs.in.zivanovic.sss.SecretShare; +import rs.in.zivanovic.sss.ShamirSecretSharing; /** * Entry point into application. @@ -59,7 +64,7 @@ public class Main { try { int s = line.indexOf("U1"); if (s >= 0) { - SecretShare share = Utils.decodeFromBinary(Base64.decode(line.substring(s))); + SecretShare share = SasUtils.decodeFromBinary(Base64.decode(line.substring(s))); shares.add(share); } else { System.err.println("Invalid data"); @@ -83,7 +88,7 @@ public class Main { String line = br.readLine(); List shares = ShamirSecretSharing.split(line, totalShares, thresholdShares); for (SecretShare share : shares) { - System.out.println(Base64.encodeBytes(Utils.encodeToBinary(share))); + System.out.println(Base64.encodeBytes(SasUtils.encodeToBinary(share))); System.out.println(); } } catch (IOException ex) { @@ -92,7 +97,14 @@ public class Main { } private static void showHelp() { - System.err.println("Share-A-Secret 1.0.0-SNAPSHOT"); + String version = "Share-A-Secret "; + try { + ResourceBundle rb = ResourceBundle.getBundle("version"); + version = String.format("%s %s", rb.getString("app.name"), rb.getString("app.version")); + } catch (MissingResourceException unused) { + // use default value + } + System.err.println(version); System.err.println("This application uses Shamir's secret sharing algorithm to split the secret data into"); System.err.println("a desired number of shares. In order to retrieve the secret data, at least a required"); System.err.println("minimum number of shares must be present."); diff --git a/src/main/java/rs/in/zivanovic/share/a/secret/SecretShare.java b/src/main/java/rs/in/zivanovic/share/a/secret/SecretShare.java deleted file mode 100644 index 38bb19a..0000000 --- a/src/main/java/rs/in/zivanovic/share/a/secret/SecretShare.java +++ /dev/null @@ -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; - -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 + '}'; - } - -} diff --git a/src/main/java/rs/in/zivanovic/share/a/secret/ShamirSecretSharing.java b/src/main/java/rs/in/zivanovic/share/a/secret/ShamirSecretSharing.java deleted file mode 100644 index f34f115..0000000 --- a/src/main/java/rs/in/zivanovic/share/a/secret/ShamirSecretSharing.java +++ /dev/null @@ -1,126 +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; - -import java.math.BigInteger; -import java.util.ArrayList; -import java.util.List; - -/** - * - * @author marko - */ -public final class ShamirSecretSharing { - - public static List split(String secretString, int total, int threshold) { - BigInteger secret = Utils.encodeSecret(secretString); - return split(secret, total, threshold); - } - - public static List 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 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 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 shares) { - return Utils.decodeSecret(join(shares)); - } - - public static BigInteger join(List 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 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() { - } - -} diff --git a/src/main/java/rs/in/zivanovic/share/a/secret/Utils.java b/src/main/java/rs/in/zivanovic/share/a/secret/Utils.java deleted file mode 100644 index 0b4c4af..0000000 --- a/src/main/java/rs/in/zivanovic/share/a/secret/Utils.java +++ /dev/null @@ -1,148 +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; - -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() { - } - -} diff --git a/src/main/resources-filtered/version.properties b/src/main/resources-filtered/version.properties new file mode 100644 index 0000000..a6fa87c --- /dev/null +++ b/src/main/resources-filtered/version.properties @@ -0,0 +1,2 @@ +app.name=${project.name} +app.version=${project.version} diff --git a/src/test/java/rs/in/zivanovic/share/a/secret/ShamirSecretSharingTest.java b/src/test/java/rs/in/zivanovic/share/a/secret/ShamirSecretSharingTest.java deleted file mode 100644 index ef4f372..0000000 --- a/src/test/java/rs/in/zivanovic/share/a/secret/ShamirSecretSharingTest.java +++ /dev/null @@ -1,109 +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; - -import java.math.BigInteger; -import java.util.*; -import static org.junit.Assert.*; -import org.junit.Test; - -/** - * - * @author marko - */ -public class ShamirSecretSharingTest { - - private static final BigInteger[] TEST_COEFFICIENTS = new BigInteger[3]; - private static final BigInteger TEST_PRIME = BigInteger.valueOf(1613); - private static final BigInteger TEST_SECRET = BigInteger.valueOf(1234); - private static final List SHARES; - - static { - TEST_COEFFICIENTS[0] = TEST_SECRET; - TEST_COEFFICIENTS[1] = BigInteger.valueOf(166); - TEST_COEFFICIENTS[2] = BigInteger.valueOf(94); - SHARES = ShamirSecretSharing.split(TEST_SECRET, TEST_COEFFICIENTS, 6, 3, TEST_PRIME); - } - - @Test - public void testSplit() { - System.out.println("split"); - assertTrue(SHARES.get(0).getShare().compareTo(BigInteger.valueOf(1494)) == 0); - assertTrue(SHARES.get(1).getShare().compareTo(BigInteger.valueOf(329)) == 0); - assertTrue(SHARES.get(2).getShare().compareTo(BigInteger.valueOf(965)) == 0); - assertTrue(SHARES.get(3).getShare().compareTo(BigInteger.valueOf(176)) == 0); - assertTrue(SHARES.get(4).getShare().compareTo(BigInteger.valueOf(1188)) == 0); - assertTrue(SHARES.get(5).getShare().compareTo(BigInteger.valueOf(775)) == 0); - } - - @Test - public void testJoinInsufficientShares() { - System.out.println("joinInsufficientShares"); - List shares = new ArrayList<>(); - shares.add(SHARES.get(0)); - shares.add(SHARES.get(5)); - BigInteger joined = ShamirSecretSharing.join(shares); - assertTrue(joined.compareTo(TEST_SECRET) != 0); - } - - @Test - public void testJoinSufficientShares() { - System.out.println("joinSufficientShares"); - List shares = new ArrayList<>(); - shares.add(SHARES.get(3)); - shares.add(SHARES.get(5)); - shares.add(SHARES.get(1)); - BigInteger joined = ShamirSecretSharing.join(shares); - assertTrue(joined.compareTo(TEST_SECRET) == 0); - } - - @Test - public void testLongStrings() { - System.out.println("longStrings"); - String s = "Quick brown fox jumps over the lazy dog."; - test(s, 6, 5); - - s = "Текст на ћирилици, чучко, џеки, Ђорђе, ..."; - test(s, 6, 5); - - s = "A sada da vidimo istu duzinu, ali, obican "; - test(s, 6, 5); - - s = "ATTACK AT DAWN"; - test(s, 6, 5); - } - - private void test(String s, int total, int required) { - List shares = ShamirSecretSharing.split(s, total, required); - List someShares = new ArrayList<>(); - for (int i = required - 1; i >= 0; i--) { - someShares.add(shares.get(i)); - } - String joined = ShamirSecretSharing.joinToUtf8String(someShares); - assertTrue(joined.equals(s)); - } - -} diff --git a/src/test/java/rs/in/zivanovic/share/a/secret/UtilsTest.java b/src/test/java/rs/in/zivanovic/share/a/secret/UtilsTest.java deleted file mode 100644 index 865a3a2..0000000 --- a/src/test/java/rs/in/zivanovic/share/a/secret/UtilsTest.java +++ /dev/null @@ -1,96 +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; - -import java.math.BigInteger; -import static org.junit.Assert.*; -import org.junit.Test; - -/** - * - * @author marko - */ -public class UtilsTest { - - private static final String s1 = "Hello World!"; - private static final String s2 = "The quick brown fox jumps over the lazy dog."; - private static final String s3 = "Текст на ћирилици."; - - public UtilsTest() { - } - - @Test - public void testGetFirstPrimeGreaterThan() { - System.out.println("getFirstPrimeGreaterThan"); - BigInteger si1 = Utils.encodeSecret(s1); - BigInteger si2 = Utils.encodeSecret(s2); - BigInteger p1 = Utils.getFirstPrimeGreaterThan(si1); - BigInteger p2 = Utils.getFirstPrimeGreaterThan(si2); - assertTrue(p1.compareTo(si1) > 0); - assertTrue(p2.compareTo(si2) > 0); - } - - @Test - public void testGetRandomPrimeGreaterThan() { - System.out.println("getRandomPrimeGreaterThan"); - BigInteger si1 = Utils.encodeSecret(s1); - BigInteger si2 = Utils.encodeSecret(s2); - BigInteger p1 = Utils.getRandomPrimeGreaterThan(si1); - BigInteger p2 = Utils.getRandomPrimeGreaterThan(si2); - assertTrue(p1.compareTo(si1) > 0); - assertTrue(p2.compareTo(si2) > 0); - } - - @Test - public void testGetRandomLessThan() { - System.out.println("getRandomLessThan"); - BigInteger i = BigInteger.valueOf(100); - BigInteger r = Utils.getRandomLessThan(i); - assertTrue(r.compareTo(i) < 0); - i = BigInteger.valueOf(100_000_000); - r = Utils.getRandomLessThan(i); - assertTrue(r.compareTo(i) < 0); - } - - @Test - public void testBinaryCodec() { - System.out.println("binaryCodec"); - SecretShare src = new SecretShare(3, new BigInteger("100"), new BigInteger("200")); - byte[] data = Utils.encodeToBinary(src); - SecretShare dst = Utils.decodeFromBinary(data); - assertTrue(src.equals(dst)); - } - - @Test - public void testSecretCodec() { - System.out.println("secretCodec"); - String s = "Текст на ћирилици, чучко, џеки, Ђорђе, ..."; - BigInteger bi = Utils.encodeSecret(s); - String d = Utils.decodeSecret(bi); - assertTrue(s.equals(d)); - } - -}