Code cleanup - repetitive calls

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1895031 13f79535-47bb-0310-9956-ffa450edef68

poi/src/main/java/org/apache/poi/poifs/crypt/agile/AgileEncryptor.java

@@ -37,6 +37,7 @@ import java.io.InputStream;
 import java.io.OutputStream;
 import java.security.GeneralSecurityException;
 import java.security.MessageDigest;
+import java.security.SecureRandom;
 
 import javax.crypto.Cipher;
 import javax.crypto.Mac;
@@ -93,11 +94,12 @@ public class AgileEncryptor extends Encryptor {
              , newIntegritySalt = IOUtils.safelyAllocate(hashSize, maxLen);
 
         // using a java.security.SecureRandom (and avoid allocating a new SecureRandom for each random number needed).
-        RandomSingleton.getInstance().nextBytes(newVerifierSalt); // blocksize
-        RandomSingleton.getInstance().nextBytes(newVerifier); // blocksize
-        RandomSingleton.getInstance().nextBytes(newKeySalt); // blocksize
-        RandomSingleton.getInstance().nextBytes(newKeySpec); // keysize
-        RandomSingleton.getInstance().nextBytes(newIntegritySalt); // hashsize
+        SecureRandom r = RandomSingleton.getInstance();
+        r.nextBytes(newVerifierSalt); // blocksize
+        r.nextBytes(newVerifier); // blocksize
+        r.nextBytes(newKeySalt); // blocksize
+        r.nextBytes(newKeySpec); // keysize
+        r.nextBytes(newIntegritySalt); // hashsize
 
         confirmPassword(password, newKeySpec, newKeySalt, newVerifierSalt, newVerifier, newIntegritySalt);
     }

poi/src/main/java/org/apache/poi/poifs/crypt/binaryrc4/BinaryRC4Encryptor.java

@@ -22,6 +22,7 @@ import java.io.IOException;
 import java.io.OutputStream;
 import java.security.GeneralSecurityException;
 import java.security.MessageDigest;
+import java.security.SecureRandom;
 
 import javax.crypto.Cipher;
 import javax.crypto.SecretKey;
@@ -51,12 +52,13 @@ public class BinaryRC4Encryptor extends Encryptor {
 
     @Override
     public void confirmPassword(String password) {
+        SecureRandom r = RandomSingleton.getInstance();
         byte[] salt = new byte[16];
         byte[] verifier = new byte[16];
 
         // using a java.security.SecureRandom (and avoid allocating a new SecureRandom for each random number needed).
-        RandomSingleton.getInstance().nextBytes(salt);
-        RandomSingleton.getInstance().nextBytes(verifier);
+        r.nextBytes(salt);
+        r.nextBytes(verifier);
         confirmPassword(password, null, null, verifier, salt, null);
     }
 

poi/src/main/java/org/apache/poi/poifs/crypt/cryptoapi/CryptoAPIEncryptor.java

@@ -22,6 +22,7 @@ import java.io.IOException;
 import java.io.OutputStream;
 import java.security.GeneralSecurityException;
 import java.security.MessageDigest;
+import java.security.SecureRandom;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -57,11 +58,12 @@ public class CryptoAPIEncryptor extends Encryptor {
 
     @Override
     public void confirmPassword(String password) {
+        SecureRandom r = RandomSingleton.getInstance();
         byte[] salt = new byte[16];
         byte[] verifier = new byte[16];
         // using a java.security.SecureRandom (and avoid allocating a new SecureRandom for each random number needed).
-        RandomSingleton.getInstance().nextBytes(salt);
-        RandomSingleton.getInstance().nextBytes(verifier);
+        r.nextBytes(salt);
+        r.nextBytes(verifier);
         confirmPassword(password, null, null, verifier, salt, null);
     }
 

poi/src/main/java/org/apache/poi/poifs/crypt/standard/StandardEncryptor.java

@@ -28,6 +28,7 @@ import java.io.IOException;
 import java.io.OutputStream;
 import java.security.GeneralSecurityException;
 import java.security.MessageDigest;
+import java.security.SecureRandom;
 import java.util.Arrays;
 
 import javax.crypto.Cipher;
@@ -64,11 +65,12 @@ public class StandardEncryptor extends Encryptor {
     @Override
     public void confirmPassword(String password) {
         // see [MS-OFFCRYPTO] - 2.3.3 EncryptionVerifier
+        SecureRandom r = RandomSingleton.getInstance();
         byte[] salt = new byte[16], verifier = new byte[16];
 
         // using a java.security.SecureRandom (and avoid allocating a new SecureRandom for each random number needed).
-        RandomSingleton.getInstance().nextBytes(salt);
-        RandomSingleton.getInstance().nextBytes(verifier);
+        r.nextBytes(salt);
+        r.nextBytes(verifier);
 
         confirmPassword(password, null, null, salt, verifier, null);
     }