diff options
Diffstat (limited to 'src/main/java/com/lowagie/bc/asn1/BERConstructedOctetString.java')
| -rw-r--r-- | src/main/java/com/lowagie/bc/asn1/BERConstructedOctetString.java | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/src/main/java/com/lowagie/bc/asn1/BERConstructedOctetString.java b/src/main/java/com/lowagie/bc/asn1/BERConstructedOctetString.java new file mode 100644 index 0000000..5c44187 --- /dev/null +++ b/src/main/java/com/lowagie/bc/asn1/BERConstructedOctetString.java @@ -0,0 +1,168 @@ +package com.lowagie.bc.asn1;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.Enumeration;
+import java.util.Vector;
+
+public class BERConstructedOctetString
+ extends DEROctetString
+{
+ /**
+ * convert a vector of octet strings into a single byte string
+ */
+ static private byte[] toBytes(
+ Vector octs)
+ {
+ ByteArrayOutputStream bOut = new ByteArrayOutputStream();
+
+ for (int i = 0; i != octs.size(); i++)
+ {
+ DEROctetString o = (DEROctetString)octs.elementAt(i);
+
+ try
+ {
+ bOut.write(o.getOctets());
+ }
+ catch (IOException e)
+ {
+ throw new RuntimeException("exception converting octets " + e.toString());
+ }
+ }
+
+ return bOut.toByteArray();
+ }
+
+ private Vector octs;
+
+ /**
+ * @param string the octets making up the octet string.
+ */
+ public BERConstructedOctetString(
+ byte[] string)
+ {
+ super(string);
+ }
+
+ public BERConstructedOctetString(
+ Vector octs)
+ {
+ super(toBytes(octs));
+
+ this.octs = octs;
+ }
+
+ public BERConstructedOctetString(
+ DERObject obj)
+ {
+ super(obj);
+ }
+
+ public BERConstructedOctetString(
+ DEREncodable obj)
+ {
+ super(obj.getDERObject());
+ }
+
+ public byte[] getOctets()
+ {
+ return string;
+ }
+
+ /**
+ * return the DER octets that make up this string.
+ */
+ public Enumeration getObjects()
+ {
+ if (octs == null)
+ {
+ return generateOcts().elements();
+ }
+
+ return octs.elements();
+ }
+
+ private Vector generateOcts()
+ {
+ int start = 0;
+ int end = 0;
+ Vector vec = new Vector();
+
+ while ((end + 1) < string.length)
+ {
+ if (string[end] == 0 && string[end + 1] == 0)
+ {
+ byte[] nStr = new byte[end - start + 1];
+
+ System.arraycopy(string, start, nStr, 0, nStr.length);
+
+ vec.addElement(new DEROctetString(nStr));
+ start = end + 1;
+ }
+ end++;
+ }
+
+ byte[] nStr = new byte[string.length - start];
+
+ System.arraycopy(string, start, nStr, 0, nStr.length);
+
+ vec.addElement(new DEROctetString(nStr));
+
+ return vec;
+ }
+
+ public void encode(
+ DEROutputStream out)
+ throws IOException
+ {
+ if (out instanceof ASN1OutputStream || out instanceof BEROutputStream)
+ {
+ out.write(CONSTRUCTED | OCTET_STRING);
+
+ out.write(0x80);
+
+ //
+ // write out the octet array
+ //
+ if (octs != null)
+ {
+ for (int i = 0; i != octs.size(); i++)
+ {
+ out.writeObject(octs.elementAt(i));
+ }
+ }
+ else
+ {
+ int start = 0;
+ int end = 0;
+
+ while ((end + 1) < string.length)
+ {
+ if (string[end] == 0 && string[end + 1] == 0)
+ {
+ byte[] nStr = new byte[end - start + 1];
+
+ System.arraycopy(string, start, nStr, 0, nStr.length);
+
+ out.writeObject(new DEROctetString(nStr));
+ start = end + 1;
+ }
+ end++;
+ }
+
+ byte[] nStr = new byte[string.length - start];
+
+ System.arraycopy(string, start, nStr, 0, nStr.length);
+
+ out.writeObject(new DEROctetString(nStr));
+ }
+
+ out.write(0x00);
+ out.write(0x00);
+ }
+ else
+ {
+ super.encode(out);
+ }
+ }
+}
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