From ed20078b7e3331e82828be357147af6a3282e4ce Mon Sep 17 00:00:00 2001
From: Ard Biesheuvel <ardb@kernel.org>
Date: Fri, 8 Nov 2019 13:22:39 +0100
Subject: crypto: chacha20poly1305 - import construction and selftest from Zinc
This incorporates the chacha20poly1305 from the Zinc library, retaining
the library interface, but replacing the implementation with calls into
the code that already existed in the kernel's crypto API.
Note that this library API does not implement RFC7539 fully, given that
it is limited to 64-bit nonces. (The 96-bit nonce version that was part
of the selftest only has been removed, along with the 96-bit nonce test
vectors that only tested the selftest but not the actual library itself)
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
include/crypto/chacha20poly1305.h | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
create mode 100644 include/crypto/chacha20poly1305.h
(limited to 'include')
diff --git a/include/crypto/chacha20poly1305.h b/include/crypto/chacha20poly1305.h
new file mode 100644
index 000000000000..ad3b1de58df8
--- /dev/null
+++ b/include/crypto/chacha20poly1305.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+/*
+ * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+ */
+
+#ifndef __CHACHA20POLY1305_H
+#define __CHACHA20POLY1305_H
+
+#include <linux/types.h>
+
+enum chacha20poly1305_lengths {
+ XCHACHA20POLY1305_NONCE_SIZE = 24,
+ CHACHA20POLY1305_KEY_SIZE = 32,
+ CHACHA20POLY1305_AUTHTAG_SIZE = 16
+};
+
+void chacha20poly1305_encrypt(u8 *dst, const u8 *src, const size_t src_len,
+ const u8 *ad, const size_t ad_len,
+ const u64 nonce,
+ const u8 key[CHACHA20POLY1305_KEY_SIZE]);
+
+bool __must_check
+chacha20poly1305_decrypt(u8 *dst, const u8 *src, const size_t src_len,
+ const u8 *ad, const size_t ad_len, const u64 nonce,
+ const u8 key[CHACHA20POLY1305_KEY_SIZE]);
+
+void xchacha20poly1305_encrypt(u8 *dst, const u8 *src, const size_t src_len,
+ const u8 *ad, const size_t ad_len,
+ const u8 nonce[XCHACHA20POLY1305_NONCE_SIZE],
+ const u8 key[CHACHA20POLY1305_KEY_SIZE]);
+
+bool __must_check xchacha20poly1305_decrypt(
+ u8 *dst, const u8 *src, const size_t src_len, const u8 *ad,
+ const size_t ad_len, const u8 nonce[XCHACHA20POLY1305_NONCE_SIZE],
+ const u8 key[CHACHA20POLY1305_KEY_SIZE]);
+
+#endif /* __CHACHA20POLY1305_H */
--
cgit