adding built-in AES support to reduce external dependency

1 files changed, 57 insertions, 0 deletions

diff --git a/src/KM_aes.h b/src/KM_aes.h
new file mode 100644
index 0000000..a5ba1d1
--- /dev/null
+++ b/src/KM_aes.h
@@ -0,0 +1,57 @@
+/*
+Copyright (c) 2020, John Hurst
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+3. The name of the author may not be used to endorse or promote products
+   derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+  /*! \file    KM_sha1.h
+    \version $Id$
+    \brief   SHA-1 message digest
+  */
+
+#ifndef _KM_AES_H_
+#define _KM_AES_H_
+
+#include <KM_platform.h>
+
+#define AES_BLOCKLEN 16 // Block length in bytes - AES is 128b block only
+#define AES_KEYLEN 16   // Key length in bytes
+#define AES_keyExpSize 176
+
+namespace Kumu {
+  struct AES_ctx
+  {
+    ui8_t RoundKey[AES_keyExpSize];
+  };
+
+  void AES_init_ctx(struct AES_ctx* ctx, const uint8_t* key);
+  void AES_encrypt(const struct AES_ctx* ctx, uint8_t* buf);
+  void AES_decrypt(const struct AES_ctx* ctx, uint8_t* buf);
+
+}; // end namespace
+
+#endif // _KM_AES_H_
+
+//
+// end KM_aes.h
+//