Fix jdk-differences for encryption patch

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1553338 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/poifs/crypt/CryptoFunctions.java

@@ -16,7 +16,7 @@
 ==================================================================== */
 package org.apache.poi.poifs.crypt;
 
-import java.nio.charset.Charset;
+import java.io.UnsupportedEncodingException;
 import java.security.DigestException;
 import java.security.GeneralSecurityException;
 import java.security.MessageDigest;
@@ -215,8 +215,11 @@ public class CryptoFunctions {
     }
     
     public static byte[] getUtf16LeString(String str) {
-        Charset cs = Charset.forName("UTF-16LE");
-        return str.getBytes(cs);
+        try {
+            return str.getBytes("UTF-16LE");
+        } catch (UnsupportedEncodingException e) {
+            throw new EncryptedDocumentException(e);
+        }
     }
     
     public static MessageDigest getMessageDigest(HashAlgorithm hashAlgorithm) {

src/java/org/apache/poi/poifs/crypt/DataSpaceMapUtils.java

@@ -18,7 +18,7 @@
 package org.apache.poi.poifs.crypt;
 
 import java.io.IOException;
-import java.nio.charset.Charset;
+import java.io.UnsupportedEncodingException;
 
 import org.apache.poi.EncryptedDocumentException;
 import org.apache.poi.poifs.crypt.standard.EncryptionRecord;
@@ -295,7 +295,6 @@ public class DataSpaceMapUtils {
     }
     
     public static String readUnicodeLPP4(LittleEndianInput is) {
-        Charset cs = Charset.forName("UTF-16LE");
         int length = is.readInt();
         byte data[] = new byte[length];
         is.readFully(data);
@@ -305,16 +304,23 @@ public class DataSpaceMapUtils {
             // 2 bytes long, and each byte MUST be 0x00.            
             is.readShort();
         }
-        return new String(data, 0, data.length, cs);
+        try {
+            return new String(data, 0, data.length, "UTF-16LE");
+        } catch (UnsupportedEncodingException e) {
+            throw new EncryptedDocumentException(e);
+        }
     }
     
     public static void writeUnicodeLPP4(LittleEndianOutput os, String str) {
-        Charset cs = Charset.forName("UTF-16LE");
-        byte buf[] = str.getBytes(cs);
-        os.writeInt(buf.length);
-        os.write(buf);
-        if (buf.length%4==2) {
-            os.writeShort(0);
+        try {
+            byte buf[] = str.getBytes("UTF-16LE");
+            os.writeInt(buf.length);
+            os.write(buf);
+            if (buf.length%4==2) {
+                os.writeShort(0);
+            }
+        } catch (UnsupportedEncodingException e) {
+            throw new EncryptedDocumentException(e);
         }
     }
 
@@ -340,8 +346,11 @@ public class DataSpaceMapUtils {
                 is.readByte();
             }
         }
-        Charset cs = Charset.forName("UTF-8");
-        return new String(data, 0, data.length, cs);
+        try {
+            return new String(data, 0, data.length, "UTF-8");
+        } catch (UnsupportedEncodingException e) {
+            throw new EncryptedDocumentException(e);
+        }
     }
     
     public static void writeUtf8LPP4(LittleEndianOutput os, String str) {
@@ -349,15 +358,18 @@ public class DataSpaceMapUtils {
             os.writeInt(str == null ? 0 : 4);
             os.writeInt(0);
         } else {
-            Charset cs = Charset.forName("UTF-8");
-            byte buf[] = str.getBytes(cs);
-            os.writeInt(buf.length);
-            os.write(buf);
-            int scratchBytes = buf.length%4;
-            if (scratchBytes > 0) {
-                for (int i=0; i<(4-scratchBytes); i++) {
-                    os.writeByte(0);
+            try {
+                byte buf[] = str.getBytes("UTF-8");
+                os.writeInt(buf.length);
+                os.write(buf);
+                int scratchBytes = buf.length%4;
+                if (scratchBytes > 0) {
+                    for (int i=0; i<(4-scratchBytes); i++) {
+                        os.writeByte(0);
+                    }
                 }
+            } catch (UnsupportedEncodingException e) {
+                throw new EncryptedDocumentException(e);
             }
         }        
     }

src/java/org/apache/poi/poifs/crypt/EncryptionInfo.java

@@ -65,7 +65,7 @@ public class EncryptionInfo {
         EncryptionInfoBuilder eib;
         try {
             eib = getBuilder(encryptionMode);
-        } catch (ReflectiveOperationException e) {
+        } catch (Exception e) {
             throw new IOException(e);
         }
 
@@ -131,7 +131,7 @@ public class EncryptionInfo {
         EncryptionInfoBuilder eib;
         try {
             eib = getBuilder(encryptionMode);
-        } catch (ReflectiveOperationException e) {
+        } catch (Exception e) {
             throw new EncryptedDocumentException(e);
         }
         
@@ -144,7 +144,7 @@ public class EncryptionInfo {
     }
 
     protected static EncryptionInfoBuilder getBuilder(EncryptionMode encryptionMode)
-    throws ReflectiveOperationException {
+    throws ClassNotFoundException, IllegalAccessException, InstantiationException {
         ClassLoader cl = Thread.currentThread().getContextClassLoader();
         EncryptionInfoBuilder eib;
         eib = (EncryptionInfoBuilder)cl.loadClass(encryptionMode.builder).newInstance();