Add Curve25519

1 files changed, 53 insertions, 0 deletions

diff --git a/source/extern/curve25519/include/curve25519_dh.h b/source/extern/curve25519/include/curve25519_dh.h
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+++ b/source/extern/curve25519/include/curve25519_dh.h
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+/* The MIT License (MIT)
+ * 
+ * Copyright (c) 2015 mehdi sotoodeh
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining 
+ * a copy of this software and associated documentation files (the 
+ * "Software"), to deal in the Software without restriction, including 
+ * without limitation the rights to use, copy, modify, merge, publish, 
+ * distribute, sublicense, and/or sell copies of the Software, and to 
+ * permit persons to whom the Software is furnished to do so, subject to 
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included 
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __curve25519_dh_key_exchange_h__
+#define __curve25519_dh_key_exchange_h__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Return public key associated with sk */
+/* sk will be trimmed on return */
+void curve25519_dh_CalculatePublicKey(
+    unsigned char *pk,          /* [32-bytes] OUT: Public key */
+    unsigned char *sk);         /* [32-bytes] IN/OUT: Your secret key */
+
+/* Faster alternative for curve25519_dh_CalculatePublicKey */
+/* sk will be trimmed on return */
+void curve25519_dh_CalculatePublicKey_fast(
+    unsigned char *pk,          /* [32-bytes] OUT: Public key */
+    unsigned char *sk);         /* [32-bytes] IN/OUT: Your secret key */
+
+/* sk will be trimmed on return */
+void curve25519_dh_CreateSharedKey(
+    unsigned char *shared,      /* [32-bytes] OUT: Created shared key */
+    const unsigned char *pk,    /* [32-bytes] IN: Other side's public key */
+    unsigned char *sk);         /* [32-bytes] IN/OUT: Your secret key */
+
+#ifdef __cplusplus
+}
+#endif
+#endif  /* __curve25519_dh_key_exchange_h__ */
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