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diff --git a/wolfssl/wolfcrypt/chacha20_poly1305.h b/wolfssl/wolfcrypt/chacha20_poly1305.h
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+/* chacha20_poly1305.h
+ *
+ * Copyright (C) 2006-2020 wolfSSL Inc.
+ *
+ * This file is part of wolfSSL.
+ *
+ * wolfSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * wolfSSL 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
+ */
+
+
+/* This implementation of the ChaCha20-Poly1305 AEAD is based on "ChaCha20
+ * and Poly1305 for IETF protocols" (draft-irtf-cfrg-chacha20-poly1305-10):
+ * https://tools.ietf.org/html/draft-irtf-cfrg-chacha20-poly1305-10
+ */
+
+/*!
+    \file wolfssl/wolfcrypt/chacha20_poly1305.h
+*/
+
+#ifndef WOLF_CRYPT_CHACHA20_POLY1305_H
+#define WOLF_CRYPT_CHACHA20_POLY1305_H
+
+#include <wolfssl/wolfcrypt/types.h>
+#include <wolfssl/wolfcrypt/chacha.h>
+#include <wolfssl/wolfcrypt/poly1305.h>
+
+#if defined(HAVE_CHACHA) && defined(HAVE_POLY1305)
+
+#ifdef __cplusplus
+    extern "C" {
+#endif
+
+#define CHACHA20_POLY1305_AEAD_KEYSIZE      32
+#define CHACHA20_POLY1305_AEAD_IV_SIZE      12
+#define CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE 16
+
+enum {
+    CHACHA20_POLY_1305_ENC_TYPE = 8,    /* cipher unique type */
+
+    /* AEAD Cipher Direction */
+    CHACHA20_POLY1305_AEAD_DECRYPT = 0,
+    CHACHA20_POLY1305_AEAD_ENCRYPT = 1,
+
+    /* AEAD State */
+    CHACHA20_POLY1305_STATE_INIT = 0,
+    CHACHA20_POLY1305_STATE_READY = 1,
+    CHACHA20_POLY1305_STATE_AAD = 2,
+    CHACHA20_POLY1305_STATE_DATA = 3,
+};
+
+typedef struct ChaChaPoly_Aead {
+    ChaCha   chacha;
+    Poly1305 poly;
+
+    word32   aadLen;
+    word32   dataLen;
+
+    byte     state;
+    byte     isEncrypt:1;
+} ChaChaPoly_Aead;
+
+
+/*
+ * The IV for this implementation is 96 bits to give the most flexibility.
+ *
+ * Some protocols may have unique per-invocation inputs that are not
+ * 96-bit in length. For example, IPsec may specify a 64-bit nonce. In
+ * such a case, it is up to the protocol document to define how to
+ * transform the protocol nonce into a 96-bit nonce, for example by
+ * concatenating a constant value.
+ */
+
+WOLFSSL_API
+int wc_ChaCha20Poly1305_Encrypt(
+                const byte inKey[CHACHA20_POLY1305_AEAD_KEYSIZE],
+                const byte inIV[CHACHA20_POLY1305_AEAD_IV_SIZE],
+                const byte* inAAD, const word32 inAADLen,
+                const byte* inPlaintext, const word32 inPlaintextLen,
+                byte* outCiphertext,
+                byte outAuthTag[CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE]);
+
+WOLFSSL_API
+int wc_ChaCha20Poly1305_Decrypt(
+                const byte inKey[CHACHA20_POLY1305_AEAD_KEYSIZE],
+                const byte inIV[CHACHA20_POLY1305_AEAD_IV_SIZE],
+                const byte* inAAD, const word32 inAADLen,
+                const byte* inCiphertext, const word32 inCiphertextLen,
+                const byte inAuthTag[CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE],
+                byte* outPlaintext);
+
+WOLFSSL_API
+int wc_ChaCha20Poly1305_CheckTag(
+    const byte authTag[CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE],
+    const byte authTagChk[CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE]);
+
+
+
+/* Implementation of AEAD, which includes support for adding
+    data, then final calculation of authentication tag */
+WOLFSSL_API int wc_ChaCha20Poly1305_Init(ChaChaPoly_Aead* aead,
+    const byte inKey[CHACHA20_POLY1305_AEAD_KEYSIZE],
+    const byte inIV[CHACHA20_POLY1305_AEAD_IV_SIZE],
+    int isEncrypt);
+WOLFSSL_API int wc_ChaCha20Poly1305_UpdateAad(ChaChaPoly_Aead* aead,
+    const byte* inAAD, word32 inAADLen);
+WOLFSSL_API int wc_ChaCha20Poly1305_UpdateData(ChaChaPoly_Aead* aead,
+    const byte* inData, byte* outData, word32 dataLen);
+WOLFSSL_API int wc_ChaCha20Poly1305_Final(ChaChaPoly_Aead* aead,
+    byte outAuthTag[CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE]);
+
+
+#ifdef __cplusplus
+    } /* extern "C" */
+#endif
+
+#endif /* HAVE_CHACHA && HAVE_POLY1305 */
+#endif /* WOLF_CRYPT_CHACHA20_POLY1305_H */