2G ems initial

2024-03-13 09:30:40 +08:00
commit eed6460ad2
1234 changed files with 419571 additions and 0 deletions
--- a/include/nettle/chacha-poly1305.h
+++ b/include/nettle/chacha-poly1305.h
@@ -0,0 +1,98 @@
+/* chacha-poly1305.h
+
+   AEAD mechanism based on chacha and poly1305.
+   See draft-agl-tls-chacha20poly1305-04.
+
+   Copyright (C) 2014 Niels Möller
+
+   This file is part of GNU Nettle.
+
+   GNU Nettle is free software: you can redistribute it and/or
+   modify it under the terms of either:
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at your
+       option) any later version.
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at your
+       option) any later version.
+
+   or both in parallel, as here.
+
+   GNU Nettle 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see http://www.gnu.org/licenses/.
+*/
+
+#ifndef NETTLE_CHACHA_POLY1305_H_INCLUDED
+#define NETTLE_CHACHA_POLY1305_H_INCLUDED
+
+#include "chacha.h"
+#include "poly1305.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Name mangling */
+#define chacha_poly1305_set_key nettle_chacha_poly1305_set_key
+#define chacha_poly1305_set_nonce nettle_chacha_poly1305_set_nonce
+#define chacha_poly1305_update nettle_chacha_poly1305_update
+#define chacha_poly1305_decrypt nettle_chacha_poly1305_decrypt
+#define chacha_poly1305_encrypt nettle_chacha_poly1305_encrypt
+#define chacha_poly1305_digest nettle_chacha_poly1305_digest
+
+#define CHACHA_POLY1305_BLOCK_SIZE 64
+/* FIXME: Any need for 128-bit variant? */
+#define CHACHA_POLY1305_KEY_SIZE 32
+#define CHACHA_POLY1305_NONCE_SIZE CHACHA_NONCE96_SIZE
+#define CHACHA_POLY1305_DIGEST_SIZE 16
+
+struct chacha_poly1305_ctx
+{
+  struct chacha_ctx chacha;
+  struct poly1305_ctx poly1305;
+  union nettle_block16 s;
+  uint64_t auth_size;
+  uint64_t data_size;
+  /* poly1305 block */
+  uint8_t block[POLY1305_BLOCK_SIZE];
+  unsigned index;
+};
+
+void
+chacha_poly1305_set_key (struct chacha_poly1305_ctx *ctx,
+			 const uint8_t *key);
+void
+chacha_poly1305_set_nonce (struct chacha_poly1305_ctx *ctx,
+			   const uint8_t *nonce);
+
+void
+chacha_poly1305_update (struct chacha_poly1305_ctx *ctx,
+			size_t length, const uint8_t *data);
+
+void
+chacha_poly1305_encrypt (struct chacha_poly1305_ctx *ctx,
+			 size_t length, uint8_t *dst, const uint8_t *src);
+			 
+void
+chacha_poly1305_decrypt (struct chacha_poly1305_ctx *ctx,
+			 size_t length, uint8_t *dst, const uint8_t *src);
+			 
+void
+chacha_poly1305_digest (struct chacha_poly1305_ctx *ctx,
+			size_t length, uint8_t *digest);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NETTLE_CHACHA_POLY1305_H_INCLUDED */