riscv: Provide a vector implementation of CHACHA20 cipher.

[openssl.git] / crypto / chacha / chacha_riscv.c

diff --git a/crypto/chacha/chacha_riscv.c b/crypto/chacha/chacha_riscv.c
new file mode 100644 (file)
index 0000000..729a628
--- /dev/null
+++ b/crypto/chacha/chacha_riscv.c
@@ -0,0 +1,55 @@
+/*
+ * This file is dual-licensed, meaning that you can use it under your
+ * choice of either of the following two licenses:
+ *
+ * Copyright 2023-2023 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ *
+ * or
+ *
+ * Copyright (c) 2023, Jerry Shih <jerry.shih@sifive.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <openssl/opensslconf.h>
+#include "crypto/chacha.h"
+#include "crypto/riscv_arch.h"
+
+void ChaCha20_ctr32_zvkb(unsigned char *out, const unsigned char *inp,
+                         size_t len, const unsigned int key[8],
+                         const unsigned int counter[4]);
+
+void ChaCha20_ctr32(unsigned char *out, const unsigned char *inp, size_t len,
+                    const unsigned int key[8], const unsigned int counter[4])
+{
+    if (RISCV_HAS_ZVKB() && riscv_vlen() >= 128) {
+        ChaCha20_ctr32_zvkb(out, inp, len, key, counter);
+    } else {
+        ChaCha20_ctr32_c(out, inp, len, key, counter);
+    }
+}