1 files changed, 66 insertions, 0 deletions
diff --git a/attic/historic/anode/libspark/wrapper.h b/attic/historic/anode/libspark/wrapper.h
new file mode 100644
index 00000000..eb8c593d
--- /dev/null
+++ b/attic/historic/anode/libspark/wrapper.h
@@ -0,0 +1,66 @@
+/* libanode: the Anode C reference implementation
+ * Copyright (C) 2009 Adam Ierymenko <adam.ierymenko@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef _SPARK_WRAPPER_H
+#define _SPARK_WRAPPER_H
+
+#include <openssl/sha.h>
+#include "../libanode/aes128.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Spark uses SHA-256 with hash length 32 */
+#define SPARK_HASH_LENGTH 32
+
+// Wrap a segment for forward propagation
+static inline void Spark_wrap(void *data,unsigned long len,void *plaintext_hash_buf,void *global_hash_buf)
+{
+  unsigned char expkey[ANODE_AES128_EXP_KEY_SIZE];
+
+  SHA256((const unsigned char *)data,len,(unsigned char *)plaintext_hash_buf);
+
+  Anode_aes128_expand_key(expkey,(const unsigned char *)plaintext_hash_buf);
+  Anode_aes128_cfb_encrypt(expkey,((const unsigned char *)plaintext_hash_buf) + 16,(unsigned char *)data,len);
+
+  SHA256((const unsigned char *)data,len,(unsigned char *)global_hash_buf);
+}
+
+// Unwrap a segment and check its integrity
+static inline int Spark_unwrap(void *data,unsigned long len,const void *plaintext_hash)
+{
+  unsigned char expkey[ANODE_AES128_EXP_KEY_SIZE];
+  unsigned char check_hash[32];
+  unsigned long i;
+
+  Anode_aes128_expand_key(expkey,(const unsigned char *)plaintext_hash);
+  Anode_aes128_cfb_decrypt(expkey,((const unsigned char *)plaintext_hash) + 16,(unsigned char *)data,len);
+
+  SHA256((const unsigned char *)data,len,check_hash);
+
+  for(i=0;i<32;++i) {
+    if (check_hash[i] != ((const unsigned char *)plaintext_hash)[i])
+      return 0;
+  }
+  return 1;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif