1 files changed, 47 insertions, 0 deletions
diff --git a/sys/include/dev/random/chacha20.h b/sys/include/dev/random/chacha20.h
new file mode 100644
index 0000000..d35702a
--- /dev/null
+++ b/sys/include/dev/random/chacha20.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * 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.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * 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 <stdint.h>
+#include <stddef.h>
+#include <string.h>
+
+#define ROTL(a,b) (((a) << (b)) | ((a) >> (32 - (b))))
+
+#define QR(a,b,c,d) \
+    a += b; d ^= a; d = ROTL(d, 16); \
+    c += d; b ^= c; b = ROTL(b, 12); \
+    a += b; d ^= a; d = ROTL(d, 8);  \
+    c += d; b ^= c; b = ROTL(b, 7);
+
+void chacha20_init(uint32_t state[16], const uint8_t key[32],
+    const uint8_t nonce[12], uint32_t counter);
+
+void chacha20_block(uint32_t state[16], uint8_t out[64]);
+void chacha20_encrypt(uint32_t state[16], uint8_t *in, uint8_t *out, size_t len);
+