There were some smaller changes in the encrypting file system (work in progress).

h2/src/test/org/h2/test/unit/TestFileSystem.java

@@ -39,11 +39,15 @@ public class TestFileSystem extends TestBase {
      */
     public static void main(String... a) throws Exception {
         TestBase test = TestBase.createCaller().init();
-        test.config.traceTest = true;
+        // test.config.traceTest = true;
         test.test();
     }
 
     public void test() throws Exception {
+        FileSystemCrypt.register();
+        // DebugFileSystem.register().setTrace(true);
+        // testFileSystem("crypt:aes:x:" + getBaseDir() + "/fs");
+
         testSplitDatabaseInZip();
         testDatabaseInMemFileSys();
         testDatabaseInJar();
@@ -270,6 +274,10 @@ public class TestFileSystem extends TestBase {
     }
 
     private void testRandomAccess(String fsBase) throws Exception {
+        testRandomAccess(fsBase, 1);
+    }
+
+    private void testRandomAccess(String fsBase, int seed) throws Exception {
         StringBuilder buff = new StringBuilder();
         FileSystem fs = FileSystem.getInstance(fsBase);
         String s = fs.createTempFile(fsBase + "/tmp", ".tmp", false, false);
@@ -286,10 +294,11 @@ public class TestFileSystem extends TestBase {
             // expected
         }
         f.sync();
-        Random random = new Random(1);
+        Random random = new Random(seed);
         int size = getSize(100, 500);
         try {
             for (int i = 0; i < size; i++) {
+                trace("op " + i);
                 int pos = random.nextInt(10000);
                 switch(random.nextInt(7)) {
                 case 0: {
@@ -310,13 +319,13 @@ public class TestFileSystem extends TestBase {
                     break;
                 }
                 case 2: {
+                    trace("setLength " + pos);
                     f.setFileLength(pos);
                     ra.setLength(pos);
                     if (ra.getFilePointer() > pos) {
                         f.seek(0);
                         ra.seek(0);
                     }
-                    trace("setLength " + pos);
                     buff.append("setLength " + pos + "\n");
                     break;
                 }
@@ -325,9 +334,9 @@ public class TestFileSystem extends TestBase {
                     len = (int) Math.min(len, ra.length() - ra.getFilePointer());
                     byte[] b1 = new byte[len];
                     byte[] b2 = new byte[len];
+                    trace("readFully " + len);
                     ra.readFully(b1, 0, len);
                     f.readFully(b2, 0, len);
-                    trace("readFully " + len);
                     buff.append("readFully " + len + "\n");
                     assertEquals(b1, b2);
                     break;
@@ -357,28 +366,30 @@ public class TestFileSystem extends TestBase {
                 default:
                 }
             }
-        } catch (Exception e) {
+        } catch (Throwable e) {
             e.printStackTrace();
             fail("Exception: " + e + "\n"+ buff.toString());
-        }
+        } finally {
             f.close();
             ra.close();
             file.delete();
             fs.delete(s);
         }
+    }
 
     private void testTempFile(String fsBase) throws Exception {
+        int len = 10000;
         FileSystem fs = FileSystem.getInstance(fsBase);
         String s = fs.createTempFile(fsBase + "/tmp", ".tmp", false, false);
         OutputStream out = fs.openFileOutputStream(s, false);
-        byte[] buffer = new byte[10000];
+        byte[] buffer = new byte[len];
         out.write(buffer);
         out.close();
         out = fs.openFileOutputStream(s, true);
         out.write(1);
         out.close();
         InputStream in = fs.openFileInputStream(s);
-        for (int i = 0; i < 10000; i++) {
+        for (int i = 0; i < len; i++) {
             assertEquals(0, in.read());
         }
         assertEquals(1, in.read());

h2/src/tools/org/h2/dev/fs/FileObjectCrypt.java

@@ -41,7 +41,7 @@ public class FileObjectCrypt implements FileObject {
     public FileObjectCrypt(String name, String algorithm, String password, FileObject file) throws IOException {
         this.name = name;
         this.file = file;
-        boolean newFile = file.length() < 2 * HEADER_LENGTH;
+        boolean newFile = file.length() < HEADER_LENGTH + BLOCK_SIZE;
         byte[] filePasswordHash;
         if (algorithm.endsWith("-hash")) {
             filePasswordHash = StringUtils.convertStringToBytes(password);
@@ -81,7 +81,7 @@ public class FileObjectCrypt implements FileObject {
     }
 
     public long length() throws IOException {
-        return Math.max(0, file.length() - 2 * HEADER_LENGTH);
+        return Math.max(0, file.length() - HEADER_LENGTH - BLOCK_SIZE);
     }
 
     public void releaseLock() {
@@ -108,9 +108,9 @@ public class FileObjectCrypt implements FileObject {
         if (newLength < length()) {
             int mod = (int) (newLength % BLOCK_SIZE);
             if (mod == 0) {
-                file.setFileLength(newLength + HEADER_LENGTH);
+                file.setFileLength(HEADER_LENGTH + newLength);
             } else {
-                file.setFileLength(newLength + HEADER_LENGTH + BLOCK_SIZE - mod);
+                file.setFileLength(HEADER_LENGTH + newLength + BLOCK_SIZE - mod);
                 byte[] buff = new byte[BLOCK_SIZE - mod];
                 long pos = getFilePointer();
                 seek(newLength);
@@ -118,7 +118,7 @@ public class FileObjectCrypt implements FileObject {
                 seek(pos);
             }
         }
-        file.setFileLength(newLength + HEADER_LENGTH + BLOCK_SIZE);
+        file.setFileLength(HEADER_LENGTH + newLength + BLOCK_SIZE);
         if (newLength < getFilePointer()) {
             seek(newLength);
         }
@@ -131,12 +131,15 @@ public class FileObjectCrypt implements FileObject {
             throw new EOFException("pos: " + pos + " len: " + len + " length: " + length);
         }
         int posMod = (int) (pos % BLOCK_SIZE);
-        int lenMod = len % BLOCK_SIZE;
-        if (posMod == 0 && lenMod == 0) {
+        if (posMod == 0 && len % BLOCK_SIZE == 0) {
             readAligned(pos, b, off, len);
         } else {
             long p = pos - posMod;
-            int l = len + 2 * BLOCK_SIZE - lenMod;
+            int l = len;
+            if (posMod != 0) {
+                l += posMod;
+            }
+            l = MathUtils.roundUpInt(l, BLOCK_SIZE);
             seek(p);
             byte[] temp = new byte[l];
             try {
@@ -151,18 +154,21 @@ public class FileObjectCrypt implements FileObject {
     public void write(byte[] b, int off, int len) throws IOException {
         long pos = getFilePointer();
         int posMod = (int) (pos % BLOCK_SIZE);
-        int lenMod = len % BLOCK_SIZE;
-        if (posMod == 0 && lenMod == 0) {
+        if (posMod == 0 && len % BLOCK_SIZE == 0) {
             byte[] temp = new byte[len];
             System.arraycopy(b, off, temp, 0, len);
             writeAligned(pos, temp, 0, len);
         } else {
             long p = pos - posMod;
-            int l = len + 2 * BLOCK_SIZE - lenMod;
+            int l = len;
+            if (posMod != 0) {
+                l += posMod;
+            }
+            l = MathUtils.roundUpInt(l, BLOCK_SIZE);
             seek(p);
             byte[] temp = new byte[l];
-            if (file.length() < pos + l + HEADER_LENGTH) {
-                file.setFileLength(pos + l + HEADER_LENGTH);
+            if (file.length() < HEADER_LENGTH + p + l) {
+                file.setFileLength(HEADER_LENGTH + p + l);
             }
             readAligned(p, temp, 0, l);
             System.arraycopy(b, off, temp, posMod, len);
@@ -174,8 +180,8 @@ public class FileObjectCrypt implements FileObject {
             }
         }
         pos = file.getFilePointer();
-        if (file.length() < pos + HEADER_LENGTH) {
-            file.setFileLength(pos + HEADER_LENGTH);
+        if (file.length() < pos + BLOCK_SIZE) {
+            file.setFileLength(pos + BLOCK_SIZE);
         }
     }