Use long for file offsets

Using an int limits the offset to about 2GB, which might not be sufficient for very large files.
Using a long results in an offset of 9EB, which should be sufficient.

spring-content-encryption/src/main/java/internal/org/springframework/content/fragments/EncryptingContentStoreImpl.java

@@ -329,26 +329,26 @@ public Resource getResource(S entity, PropertyPath propertyPath, GetResourcePara
         return r;
     }
 
-    private int getOffset(Resource r, GetResourceParams params) {
+    private long getOffset(Resource r, GetResourceParams params) {
         int offset = 0;
 
         if (r instanceof RangeableResource == false)
             return offset;
         if (params.getRange() == null)
             return offset;
 
-        return Integer.parseInt(StringUtils.substringBetween(params.getRange(), "bytes=", "-"));
+        return Long.parseUnsignedLong(StringUtils.substringBetween(params.getRange(), "bytes=", "-"));
     }
 
-    private int getOffset(Resource r, org.springframework.content.commons.store.GetResourceParams params) {
-        int offset = 0;
+    private long getOffset(Resource r, org.springframework.content.commons.store.GetResourceParams params) {
+        long offset = 0;
 
         if (r instanceof RangeableResource == false)
             return offset;
         if (params.getRange() == null)
             return offset;
 
-        return Integer.parseInt(StringUtils.substringBetween(params.getRange(), "bytes=", "-"));
+        return Long.parseUnsignedLong(StringUtils.substringBetween(params.getRange(), "bytes=", "-"));
     }
 
     @Override

spring-content-encryption/src/main/java/org/springframework/content/encryption/EnvelopeEncryptionService.java

@@ -84,7 +84,7 @@ private SecretKey generateDataKey() {
         return KEY_GENERATOR.generateKey();
     }
 
-    private InputStream decryptInputStream(final SecretKeySpec secretKeySpec, byte[] nonce, int offset, InputStream is) throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, IOException, InvalidAlgorithmParameterException {
+    private InputStream decryptInputStream(final SecretKeySpec secretKeySpec, byte[] nonce, long offset, InputStream is) throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, IOException, InvalidAlgorithmParameterException {
         Cipher cipher = Cipher.getInstance(transformation);
 
         byte[] iv = new byte[128 / 8];
@@ -124,7 +124,7 @@ private SecretKeySpec decryptKey(byte[] encryptedKey, String keyName) {
         return key;
     }
 
-    public InputStream decrypt(byte[] ecryptedContext, InputStream is, int offset, String keyName) {
+    public InputStream decrypt(byte[] ecryptedContext, InputStream is, long offset, String keyName) {
 
         byte[] key = new byte[105];
         System.arraycopy(ecryptedContext, 0, key, 0, 105);