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| author | Kenny Root <kenny@the-b.org> | 2007-11-17 05:58:42 +0000 |
|---|---|---|
| committer | Kenny Root <kenny@the-b.org> | 2007-11-17 05:58:42 +0000 |
| commit | dfa41d090260eed63f3d8510571a2f6236a5ff45 (patch) | |
| tree | 1eaca308ba9bb913161edf83bfef5f9295784e56 /src/com/trilead/ssh2/crypto/digest/MAC.java | |
| parent | edfccaafe3e754ed124afa67465b6044eacd3987 (diff) | |
| download | connectbot-dfa41d090260eed63f3d8510571a2f6236a5ff45.tar.gz connectbot-dfa41d090260eed63f3d8510571a2f6236a5ff45.tar.bz2 connectbot-dfa41d090260eed63f3d8510571a2f6236a5ff45.zip | |
Initial import.
Diffstat (limited to 'src/com/trilead/ssh2/crypto/digest/MAC.java')
| -rw-r--r-- | src/com/trilead/ssh2/crypto/digest/MAC.java | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/com/trilead/ssh2/crypto/digest/MAC.java b/src/com/trilead/ssh2/crypto/digest/MAC.java new file mode 100644 index 0000000..0433b63 --- /dev/null +++ b/src/com/trilead/ssh2/crypto/digest/MAC.java @@ -0,0 +1,88 @@ +
+package com.trilead.ssh2.crypto.digest;
+
+/**
+ * MAC.
+ *
+ * @author Christian Plattner, plattner@trilead.com
+ * @version $Id: MAC.java,v 1.1 2007/10/15 12:49:57 cplattne Exp $
+ */
+public final class MAC
+{
+ Digest mac;
+ int size;
+
+ public final static String[] getMacList()
+ {
+ /* Higher Priority First */
+
+ return new String[] { "hmac-sha1-96", "hmac-sha1", "hmac-md5-96", "hmac-md5" };
+ }
+
+ public final static void checkMacList(String[] macs)
+ {
+ for (int i = 0; i < macs.length; i++)
+ getKeyLen(macs[i]);
+ }
+
+ public final static int getKeyLen(String type)
+ {
+ if (type.equals("hmac-sha1"))
+ return 20;
+ if (type.equals("hmac-sha1-96"))
+ return 20;
+ if (type.equals("hmac-md5"))
+ return 16;
+ if (type.equals("hmac-md5-96"))
+ return 16;
+ throw new IllegalArgumentException("Unkown algorithm " + type);
+ }
+
+ public MAC(String type, byte[] key)
+ {
+ if (type.equals("hmac-sha1"))
+ {
+ mac = new HMAC(new SHA1(), key, 20);
+ }
+ else if (type.equals("hmac-sha1-96"))
+ {
+ mac = new HMAC(new SHA1(), key, 12);
+ }
+ else if (type.equals("hmac-md5"))
+ {
+ mac = new HMAC(new MD5(), key, 16);
+ }
+ else if (type.equals("hmac-md5-96"))
+ {
+ mac = new HMAC(new MD5(), key, 12);
+ }
+ else
+ throw new IllegalArgumentException("Unkown algorithm " + type);
+
+ size = mac.getDigestLength();
+ }
+
+ public final void initMac(int seq)
+ {
+ mac.reset();
+ mac.update((byte) (seq >> 24));
+ mac.update((byte) (seq >> 16));
+ mac.update((byte) (seq >> 8));
+ mac.update((byte) (seq));
+ }
+
+ public final void update(byte[] packetdata, int off, int len)
+ {
+ mac.update(packetdata, off, len);
+ }
+
+ public final void getMac(byte[] out, int off)
+ {
+ mac.digest(out, off);
+ }
+
+ public final int size()
+ {
+ return size;
+ }
+}
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