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authorLibravatar vnugent <public@vaughnnugent.com>2024-04-23 14:48:05 -0400
committerLibravatar vnugent <public@vaughnnugent.com>2024-04-23 14:48:05 -0400
commit30e8dda6cbea86bdee6d5dfe48514385d3b9f81b (patch)
tree49a4e59a5e0bdf867e31168852d7299c6bb7c783 /src/internal/impl/monocypher.c
parentd09c6c1bd5da3e2d79351daeba304ca99976a726 (diff)
refactor: Crypto dep redesign working on Windows
Diffstat (limited to 'src/internal/impl/monocypher.c')
-rw-r--r--src/internal/impl/monocypher.c84
1 files changed, 84 insertions, 0 deletions
diff --git a/src/internal/impl/monocypher.c b/src/internal/impl/monocypher.c
new file mode 100644
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--- /dev/null
+++ b/src/internal/impl/monocypher.c
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+/*
+* Copyright (c) 2024 Vaughn Nugent
+*
+* Package: noscrypt
+* File: impl/monocypher.c
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public License
+* as published by the Free Software Foundation; either version 2.1
+* of the License, or (at your option) any later version.
+*
+* This library 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
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public License
+* along with noscrypt. If not, see http://www.gnu.org/licenses/.
+*/
+
+
+/*
+* This file handles some fallbacks that may not be available on
+* some platforms. More specifically:
+* - Secure memset 0
+* - Chacha20 cipher
+*
+*/
+
+#ifdef NC_ENABLE_MONOCYPHER
+
+#include <monocypher.h>
+
+#include "../../platform.h"
+#include "../nc-util.h"
+
+/* Export secure memse0 */
+#ifndef _IMPL_SECURE_ZERO_MEMSET
+
+ /* export cytpo wipe function as is */
+ #define _IMPL_SECURE_ZERO_MEMSET crypto_wipe
+#endif
+
+/* Export Chacha20 */
+#ifndef _IMPL_CHACHA20_CRYPT
+
+ #define _IMPL_CHACHA20_CRYPT _mc_chacha20_crypt
+
+ _IMPLSTB cstatus_t _mc_chacha20_crypt(
+ const uint8_t* key,
+ const uint8_t* nonce,
+ const uint8_t* input,
+ uint8_t* output,
+ uint64_t dataLen
+ )
+ {
+ if(dataLen > SIZE_MAX)
+ {
+ return CSTATUS_FAIL;
+ }
+
+ /*
+ * Function returns the next counter value which is not
+ * needed for noscrypt as encryptions are one-shot, and
+ * require a new nonce for each encryption.
+ *
+ * ITEF function uses a 12byte nonce which is required for
+ * nip-44 compliant encryption.
+ */
+ crypto_chacha20_ietf(
+ output,
+ input,
+ (size_t)dataLen,
+ key,
+ nonce,
+ 0x00 /* Counter always starts at 0 */
+ );
+
+ return CSTATUS_OK;
+ }
+
+#endif
+
+#endif /* !NC_ENABLE_MONOCYPHER */ \ No newline at end of file