Add GCM, CTR, and CTS modes to AES.

nss/mozilla/security/nss/lib/freebl/gcm.h

+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef GCM_H
+#define GCM_H 1
+
+#include "blapii.h"
+
+typedef struct GCMContextStr GCMContext;
+
+/*
+ * The context argument is the inner cipher context to use with cipher. The
+ * GCMContext does not own context. context needs to remain valid for as long
+ * as the GCMContext is valid.
+ *
+ * The cipher argument is a block cipher in the ECB encrypt mode.
+ */
+GCMContext * GCM_CreateContext(void *context, freeblCipherFunc cipher,
+                        const unsigned char *params, unsigned int blocksize);
+void GCM_DestroyContext(GCMContext *gcm, PRBool freeit);
+SECStatus GCM_EncryptUpdate(GCMContext  *gcm, unsigned char *outbuf,
+                        unsigned int *outlen, unsigned int maxout,
+                        const unsigned char *inbuf, unsigned int inlen,
+                        unsigned int blocksize);
+SECStatus GCM_DecryptUpdate(GCMContext *gcm, unsigned char *outbuf,
+                        unsigned int *outlen, unsigned int maxout,
+                        const unsigned char *inbuf, unsigned int inlen,
+                        unsigned int blocksize);
+
+#endif