spn decryption works
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2 changed files with 110 additions and 13 deletions
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@ -23,10 +23,9 @@ class SPNTest {
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//given
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int x = 0xEF45;
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int r = 0x051C;
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System.out.print(Integer.toHexString(x));
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//when
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int y = spn.substitution(x);
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int y = spn.substitution(x, SPN.SBOX_REVERSE);
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// then
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assertEquals(r, y);
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@ -51,5 +50,27 @@ class SPNTest {
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assertEquals(r, y);
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assertEquals(r, yy);
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assertEquals(x, yyy);
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assertEquals(0x100A, spn.swapBits(0x80A, 3, 4));
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}
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@Test
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void permutation() {
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var spn = new SPN();
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int x = spn.permutation(0xEF45);
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assertEquals(0xCFC5, x);
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}
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@Test
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void sp() {
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var spn = new SPN();
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int x = 0x128F ;
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int key = 0x11288C00;
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int y = 0xAEB4;
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assertEquals(y, spn.encryptBlock(key, x));
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assertEquals(x, spn.decryptBlock(key, y));
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}
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}
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