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Diffstat (limited to 'common/src/at/gv/egovernment/moa/util/Base64Utils.java')
-rw-r--r--common/src/at/gv/egovernment/moa/util/Base64Utils.java109
1 files changed, 109 insertions, 0 deletions
diff --git a/common/src/at/gv/egovernment/moa/util/Base64Utils.java b/common/src/at/gv/egovernment/moa/util/Base64Utils.java
new file mode 100644
index 000000000..ba2c4fb0e
--- /dev/null
+++ b/common/src/at/gv/egovernment/moa/util/Base64Utils.java
@@ -0,0 +1,109 @@
+package at.gv.egovernment.moa.util;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UnsupportedEncodingException;
+
+import iaik.utils.Base64InputStream;
+import iaik.utils.Base64OutputStream;
+
+/**
+ * Utitility functions for encoding/decoding Base64 strings.
+ *
+ * @author Patrick Peck
+ * @version $Id$
+ */
+public class Base64Utils {
+
+ /**
+ * Read the bytes encoded in a Base64 encoded <code>String</code>.
+ *
+ * @param base64String The <code>String</code> containing the Base64 encoded
+ * bytes.
+ * @param ignoreInvalidChars Whether to ignore invalid Base64 characters.
+ * @return byte[] The raw bytes contained in the <code>base64String</code>.
+ * @throws IOException Failed to read the Base64 data.
+ */
+ public static byte[] decode(String base64String, boolean ignoreInvalidChars)
+ throws IOException {
+
+ Base64InputStream in =
+ new Base64InputStream(
+ new ByteArrayInputStream(base64String.getBytes("UTF-8")),
+ ignoreInvalidChars);
+ ByteArrayOutputStream out = new ByteArrayOutputStream();
+ byte[] bytes = new byte[256];
+ int bytesRead;
+
+ while ((bytesRead = in.read(bytes)) > 0) {
+ out.write(bytes, 0, bytesRead);
+ }
+
+ return out.toByteArray();
+ }
+
+ /**
+ * Read the bytes encoded in a Base64 encoded <code>String</code> and provide
+ * them via an <code>InputStream</code>.
+ *
+ * @param base64String The <code>String</code> containing the Base64 encoded
+ * bytes.
+ * @param ignoreInvalidChars Whether to ignore invalid Base64 characters.
+ * @return The <code>InputStream</code> from which the binary content of the
+ * <code>base64String</code> can be read.
+ */
+ public static InputStream decodeToStream(
+ String base64String,
+ boolean ignoreInvalidChars) {
+
+ try {
+ ByteArrayInputStream bin =
+ new ByteArrayInputStream(base64String.getBytes("UTF-8"));
+ Base64InputStream in = new Base64InputStream(bin, ignoreInvalidChars);
+
+ return in;
+ } catch (UnsupportedEncodingException e) {
+ // cannot occur, since UTF-8 is required to be supported by every JRE
+ return null;
+ }
+ }
+
+ /**
+ * Convert a byte array to a Base64 encoded <code>String</code>.
+ *
+ * @param bytes The bytes to encode.
+ * @return String The Base64 encoded representation of the <code>bytes</code>.
+ * @throws IOException Failed to write the bytes as Base64 data.
+ */
+ public static String encode(byte[] bytes) throws IOException {
+ return encode(new ByteArrayInputStream(bytes));
+ }
+
+ /**
+ * Convert the data contained in the given stream to a Base64 encoded
+ * <code>String</code>.
+ *
+ * @param inputStream The stream containing the data to encode.
+ * @return The Base64 encoded data of <code>inputStream</code>, as a
+ * <code>String</code>.
+ * @throws IOException Failed to convert the data in the stream.
+ */
+ public static String encode(InputStream inputStream) throws IOException {
+ ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
+ Base64OutputStream base64Stream = new Base64OutputStream(byteStream);
+ byte[] bytes = new byte[256];
+ int bytesRead;
+
+ while ((bytesRead = inputStream.read(bytes)) > 0) {
+ base64Stream.write(bytes, 0, bytesRead);
+ }
+ base64Stream.flush();
+ base64Stream.close();
+ inputStream.close();
+
+ return byteStream.toString("UTF-8");
+ }
+
+}