tests: Use IV of size 16 bytes in CipherTests

We only have AES in the list of FIPS-approved Ciphers.
AES needs an initialization vector of size 16-bytes. This
"might" have been the reason for the intermittent failures
seen in CipherTests.

src/test/java/CipherTest.java

@@ -37,15 +37,6 @@
 import static org.junit.Assert.assertArrayEquals;
 
 public class CipherTest {
-    List<String> flakyTests = List.of(
-        "AES192/GCM/ISO10126_2",
-	"AES128/GCM/PKCS7",
-        "AES256/CTR/NONE",
-        "AES128/CBC/NONE",
-        "AES128/CBC/PKCS5",
-        "AES128/CTR/PKCS5",
-        "AES128/CFB1/X9_23"
-    );
 
     String [] paddings = {
         "NONE",
@@ -130,7 +121,7 @@ private void runTestMultipleUpdates(String nameKeySizeAndMode, String padding) t
 
         sr.nextBytes(key);
 
-        byte[] iv = new byte[8];
+        byte[] iv = new byte[16];
         sr.nextBytes(iv);
 
         byte[] input = new byte[16];
@@ -159,8 +150,6 @@ private void runTestMultipleUpdates(String nameKeySizeAndMode, String padding) t
         decipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(key, "AES"), spec, sr);
         byte[] output = decipher.doFinal(fullEnc, 0, encLen);
 
-        if (flakyTests.contains(cipherName))
-            return;
         assertArrayEquals("Multi-update cipher test for " + cipherName + " failed", fullInput, output); 
     }
 
@@ -183,7 +172,7 @@ private void runTestSingleUpdate(String nameKeySizeAndMode, String padding) thro
 
         sr.nextBytes(key);
 
-        byte[] iv = new byte[8]; 
+        byte[] iv = new byte[16];
         sr.nextBytes(iv);
 
         AlgorithmParameterSpec spec = new IvParameterSpec(iv);