1 files changed, 66 insertions, 0 deletions
diff --git a/sys/crypto/chachapoly.h b/sys/crypto/chachapoly.h
new file mode 100644
index 00000000000..b2f162248ff
--- /dev/null
+++ b/sys/crypto/chachapoly.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2015 Mike Belopuhov
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _CHACHAPOLY_H_
+#define _CHACHAPOLY_H_
+
+#define CHACHA20_KEYSIZE	32
+#define CHACHA20_CTR		4
+#define CHACHA20_SALT		4
+#define CHACHA20_NONCE		8
+#define CHACHA20_BLOCK_LEN	64
+
+struct chacha20_ctx {
+	uint8_t			block[CHACHA20_BLOCK_LEN];
+	uint8_t			nonce[CHACHA20_NONCE];
+};
+
+int	chacha20_setkey(void *, u_int8_t *, int);
+void	chacha20_reinit(caddr_t, u_int8_t *);
+void	chacha20_crypt(caddr_t, u_int8_t *);
+
+
+#define POLY1305_KEYLEN		32
+#define POLY1305_TAGLEN		16
+#define POLY1305_BLOCK_LEN	16
+
+struct poly1305_ctx {
+	/* r, h, pad, leftover */
+	unsigned long		state[5+5+4];
+	size_t			leftover;
+	unsigned char		buffer[POLY1305_BLOCK_LEN];
+	unsigned char		final;
+};
+
+typedef struct {
+	uint8_t			key[POLY1305_KEYLEN];
+	/* counter, salt */
+	uint8_t			nonce[CHACHA20_NONCE];
+	struct chacha20_ctx	chacha;
+	struct poly1305_ctx	poly;
+} CHACHA20_POLY1305_CTX;
+
+void	Chacha20_Poly1305_Init(CHACHA20_POLY1305_CTX *);
+void	Chacha20_Poly1305_Setkey(CHACHA20_POLY1305_CTX *, const uint8_t *,
+	    uint16_t);
+void	Chacha20_Poly1305_Reinit(CHACHA20_POLY1305_CTX *, const uint8_t *,
+	    uint16_t);
+int	Chacha20_Poly1305_Update(CHACHA20_POLY1305_CTX *, const uint8_t *,
+	    uint16_t);
+void	Chacha20_Poly1305_Final(uint8_t[POLY1305_TAGLEN],
+	    CHACHA20_POLY1305_CTX *);
+
+#endif	/* _CHACHAPOLY_H_ */