1 files changed, 128 insertions, 0 deletions
diff --git a/smcc/src/main/java/at/gv/egiz/smcc/cio/CIODirectoryFile.java b/smcc/src/main/java/at/gv/egiz/smcc/cio/CIODirectoryFile.java
new file mode 100644
index 00000000..2d2fd03d
--- /dev/null
+++ b/smcc/src/main/java/at/gv/egiz/smcc/cio/CIODirectoryFile.java
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2008 Federal Chancellery Austria and
+ * Graz University of Technology
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package at.gv.egiz.smcc.cio;
+
+import at.gv.egiz.smcc.SignatureCardException;
+import at.gv.egiz.smcc.util.ISO7816Utils;
+import at.gv.egiz.smcc.util.TLVSequence;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+import javax.smartcardio.CardChannel;
+import javax.smartcardio.CardException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ *
+ * @author clemens
+ */
+public abstract class CIODirectoryFile {
+
+    protected static final Logger log = LoggerFactory.getLogger(CIODirectoryFile.class);
+    
+    protected List<byte[]> DF_FIDs;
+
+    public CIODirectoryFile(List<byte[]> DF_FIDs) {
+        this.DF_FIDs = DF_FIDs;
+    }
+
+    /**
+     * assume DF.CIA selected
+     * (one of) CIO.CD selected afterwards
+     *
+     * TODO: make abstract, implementation knows how to read file. only provide utility methods
+     *
+     * @param channel
+     * @throws CardException
+     * @throws SignatureCardException
+     * @throws IOException if ASN.1 structure cannot be parsed
+     */
+    public void readCIOs(CardChannel channel)
+            throws CardException, SignatureCardException, IOException {
+
+        for (byte[] fid : DF_FIDs) {
+            byte[] fd = selectDirectoryFile(channel, fid);
+            if ((fd[0] & 0x04) > 0) {
+                readCIOsFromRecords(channel, fd);
+            } else if ((fd[0] & 0x05) == 0x01) {
+                readCIOsFromTransparentFile(channel);
+            }
+        }
+    }
+
+    /**
+     * card specific implementation to select a CIO DF file and return its file descriptor
+     * @param channel
+     * @param fid
+     * @return file descriptor
+     * @throws CardException
+     */
+    protected abstract byte[] selectDirectoryFile(CardChannel channel, byte[] fid) throws CardException;
+
+
+    protected void readCIOsFromRecords(CardChannel channel, byte[] fd) throws CardException, SignatureCardException, IOException {
+
+        for (int r = 1; r < fd[fd.length - 1]; r++) {
+            log.trace("read CIO record {}", r);
+            byte[] record = ISO7816Utils.readRecord(channel, r);
+            addCIO(record);
+        }
+    }
+
+
+    protected void readCIOsFromTransparentFile(CardChannel channel) throws CardException, SignatureCardException, IOException {
+
+    	byte[] ef = ISO7816Utils.readTransparentFile(channel, -1);
+
+        int i = 0;
+        int j;
+
+        do {
+            int length = 0;
+            int ll = 0;
+            if ((ef[i + 1] & 0xf0) == 0x80) {
+                ll = ef[i + 1] & 0x7f;
+                for (int it = 0; it < ll; it++) {
+                    length = (length << 8) + (ef[i + it + 2] & 0xff);
+                }
+            } else {
+                length = (ef[i + 1] & 0xff);
+            }
+
+            log.trace("read CIO transparent file entry: tag 0x{}, length 0x{}",
+                    Integer.toHexString(ef[i]),
+                    Integer.toHexString(length));
+
+            j = i + 2 + ll + length;
+            addCIO(Arrays.copyOfRange(ef, i, j));
+            i = j;
+        } while (i < ef.length && ef[i] > 0);
+
+    }
+
+
+    
+    /**
+     * CIO specific (Cert/PrK/AO/... CIO)
+     * @param cio
+     */
+    protected abstract void addCIO(byte[] cio) throws IOException;
+
+    public abstract List<? extends CIO> getCIOs(CardChannel channel) throws CardException, SignatureCardException, IOException;
+}