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Des (#4172)
* Update directory * Add DES Encryption algorithm * Update directory --------- Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
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51
src/test/java/com/thealgorithms/ciphers/DESTest.java
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51
src/test/java/com/thealgorithms/ciphers/DESTest.java
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package com.thealgorithms.ciphers;
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import static org.junit.jupiter.api.Assertions.*;
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import org.junit.jupiter.api.BeforeEach;
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import org.junit.jupiter.api.Test;
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//Test example taken from https://page.math.tu-berlin.de/~kant/teaching/hess/krypto-ws2006/des.htm
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public class DESTest {
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DES des;
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@BeforeEach
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public void setUp() {
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des = new DES("0000111000110010100100100011001011101010011011010000110101110011");
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}
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@Test
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void testEncrypt() {
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//given
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String plainText = "Your lips are smoother than vaseline\r\n";
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//This is equal to c0999fdde378d7ed727da00bca5a84ee47f269a4d6438190d9d52f78f5358499828ac9b453e0e653 in hexadecimal
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String expectedOutput = "11000000100110011001111111011101111000110111100011010111111" +
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"011010111001001111101101000000000101111001010010110101000010011101110010001111111001" +
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"001101001101001001101011001000011100000011001000011011001110101010010111101111000111" +
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"101010011010110000100100110011000001010001010110010011011010001010011111000001110011001010011";
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//when
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String cipherText = des.encrypt(plainText);
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//then
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assertEquals(expectedOutput, cipherText);
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}
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@Test
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void testDecrypt() {
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//given
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//This is equal to c0999fdde378d7ed727da00bca5a84ee47f269a4d6438190d9d52f78f5358499828ac9b453e0e653 in hexadecimal
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String cipherText = "11000000100110011001111111011101111000110111100011010111111" +
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"011010111001001111101101000000000101111001010010110101000010011101110010001111111001" +
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"001101001101001001101011001000011100000011001000011011001110101010010111101111000111" +
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"101010011010110000100100110011000001010001010110010011011010001010011111000001110011001010011";
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String expectedOutput = "Your lips are smoother than vaseline\r\n";;
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//when
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String plainText = des.decrypt(cipherText);
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//then
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assertEquals(expectedOutput, plainText);
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}
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}
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