diff --git a/wrapper/rust/include.am b/wrapper/rust/include.am index b1afb7808ee..3d2ce03d652 100644 --- a/wrapper/rust/include.am +++ b/wrapper/rust/include.am @@ -13,6 +13,7 @@ EXTRA_DIST += wrapper/rust/wolfssl-wolfcrypt/build.rs EXTRA_DIST += wrapper/rust/wolfssl-wolfcrypt/headers.h EXTRA_DIST += wrapper/rust/wolfssl-wolfcrypt/src/aes.rs EXTRA_DIST += wrapper/rust/wolfssl-wolfcrypt/src/blake2.rs +EXTRA_DIST += wrapper/rust/wolfssl-wolfcrypt/src/chacha20_poly1305.rs EXTRA_DIST += wrapper/rust/wolfssl-wolfcrypt/src/cmac.rs EXTRA_DIST += wrapper/rust/wolfssl-wolfcrypt/src/curve25519.rs EXTRA_DIST += wrapper/rust/wolfssl-wolfcrypt/src/dh.rs @@ -30,6 +31,7 @@ EXTRA_DIST += wrapper/rust/wolfssl-wolfcrypt/src/sha.rs EXTRA_DIST += wrapper/rust/wolfssl-wolfcrypt/src/sys.rs EXTRA_DIST += wrapper/rust/wolfssl-wolfcrypt/tests/test_aes.rs EXTRA_DIST += wrapper/rust/wolfssl-wolfcrypt/tests/test_blake2.rs +EXTRA_DIST += wrapper/rust/wolfssl-wolfcrypt/tests/test_chacha20_poly1305.rs EXTRA_DIST += wrapper/rust/wolfssl-wolfcrypt/tests/test_cmac.rs EXTRA_DIST += wrapper/rust/wolfssl-wolfcrypt/tests/test_curve25519.rs EXTRA_DIST += wrapper/rust/wolfssl-wolfcrypt/tests/test_dh.rs diff --git a/wrapper/rust/wolfssl-wolfcrypt/build.rs b/wrapper/rust/wolfssl-wolfcrypt/build.rs index 6bcf08a7036..9023d692600 100644 --- a/wrapper/rust/wolfssl-wolfcrypt/build.rs +++ b/wrapper/rust/wolfssl-wolfcrypt/build.rs @@ -130,6 +130,9 @@ fn scan_cfg() -> Result<()> { check_cfg(&binding, "wc_InitBlake2b", "blake2b"); check_cfg(&binding, "wc_InitBlake2s", "blake2s"); + /* chacha20_poly1305 */ + check_cfg(&binding, "wc_ChaCha20Poly1305_Encrypt", "chacha20_poly1305"); + /* cmac */ check_cfg(&binding, "wc_InitCmac", "cmac"); diff --git a/wrapper/rust/wolfssl-wolfcrypt/src/chacha20_poly1305.rs b/wrapper/rust/wolfssl-wolfcrypt/src/chacha20_poly1305.rs new file mode 100644 index 00000000000..38b9efedb7c --- /dev/null +++ b/wrapper/rust/wolfssl-wolfcrypt/src/chacha20_poly1305.rs @@ -0,0 +1,242 @@ +/* + * Copyright (C) 2025 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 3 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 module provides a Rust wrapper for the wolfCrypt library's +ChaCha20-Poly1305 functionality. +*/ + +#![cfg(chacha20_poly1305)] + +use crate::sys; +use std::mem::MaybeUninit; + +pub struct ChaCha20Poly1305 { + wc_ccp: sys::ChaChaPoly_Aead, +} + +impl ChaCha20Poly1305 { + pub const KEYSIZE: usize = sys::CHACHA20_POLY1305_AEAD_KEYSIZE as usize; + pub const IV_SIZE: usize = sys::CHACHA20_POLY1305_AEAD_IV_SIZE as usize; + pub const AUTH_TAG_SIZE: usize = sys::CHACHA20_POLY1305_AEAD_AUTHTAG_SIZE as usize; + + /// Decrypt an input message from `ciphertext` using the ChaCha20 stream + /// cipher into the `plaintext` output buffer. It also performs Poly-1305 + /// authentication, comparing the given `auth_tag` to an authentication + /// generated with the `aad` (additional authentication data). If Err is + /// returned, the output data, `plaintext` is undefined. However, callers + /// must unconditionally zeroize the output buffer to guard against + /// leakage of cleartext data. + /// + /// # Parameters + /// + /// * `key`: Encryption key (must be 32 bytes). + /// * `iv`: Initialization Vector (must be 12 bytes). + /// * `aad`: Additional authenticated data (can be any length). + /// * `ciphertext`: Input buffer containing encrypted cipher text. + /// * `auth_tag`: Input buffer containing authentication tag (must be 16 + /// bytes). + /// * `plaintext`: Output buffer containing decrypted plain text. + /// + /// # Returns + /// + /// Returns either Ok(()) on success or Err(e) containing the wolfSSL + /// library error code value. + pub fn decrypt(key: &[u8], iv: &[u8], aad: &[u8], ciphertext: &[u8], + auth_tag: &[u8], plaintext: &mut [u8]) -> Result<(), i32> { + if key.len() != Self::KEYSIZE { + return Err(sys::wolfCrypt_ErrorCodes_BUFFER_E); + } + if iv.len() != Self::IV_SIZE { + return Err(sys::wolfCrypt_ErrorCodes_BUFFER_E); + } + if auth_tag.len() != Self::AUTH_TAG_SIZE { + return Err(sys::wolfCrypt_ErrorCodes_BUFFER_E); + } + let aad_size = aad.len() as u32; + let ciphertext_size = ciphertext.len() as u32; + let rc = unsafe { + sys::wc_ChaCha20Poly1305_Decrypt(key.as_ptr(), iv.as_ptr(), + aad.as_ptr(), aad_size, ciphertext.as_ptr(), + ciphertext_size, auth_tag.as_ptr(), plaintext.as_mut_ptr()) + }; + if rc != 0 { + return Err(rc); + } + Ok(()) + } + + /// Encrypt an input message from `plaintext` using the ChaCha20 stream + /// cipher into the `ciphertext` output buffer performing Poly-1305 + /// authentication on the cipher text and storing the generated + /// authentication tag in the `auth_tag` output buffer. + /// + /// # Parameters + /// + /// * `key`: Encryption key (must be 32 bytes). + /// * `iv`: Initialization Vector (must be 12 bytes). + /// * `aad`: Additional authenticated data (can be any length). + /// * `plaintext`: Input plain text to encrypt. + /// * `ciphertext`: Output buffer for encrypted cipher text. + /// * `auth_tag`: Output buffer for authentication tag (must be 16 bytes). + /// + /// # Returns + /// + /// Returns either Ok(()) on success or Err(e) containing the wolfSSL + /// library error code value. + pub fn encrypt(key: &[u8], iv: &[u8], aad: &[u8], plaintext: &[u8], + ciphertext: &mut [u8], auth_tag: &mut [u8]) -> Result<(), i32> { + if key.len() != Self::KEYSIZE { + return Err(sys::wolfCrypt_ErrorCodes_BUFFER_E); + } + if iv.len() != Self::IV_SIZE { + return Err(sys::wolfCrypt_ErrorCodes_BUFFER_E); + } + if auth_tag.len() != Self::AUTH_TAG_SIZE { + return Err(sys::wolfCrypt_ErrorCodes_BUFFER_E); + } + let aad_size = aad.len() as u32; + let plaintext_size = plaintext.len() as u32; + let rc = unsafe { + sys::wc_ChaCha20Poly1305_Encrypt(key.as_ptr(), iv.as_ptr(), + aad.as_ptr(), aad_size, plaintext.as_ptr(), plaintext_size, + ciphertext.as_mut_ptr(), auth_tag.as_mut_ptr()) + }; + if rc != 0 { + return Err(rc); + } + Ok(()) + } + + /// Create a new ChaCha20Poly1305 instance. + /// + /// # Parameters + /// + /// * `key`: Encryption key (must be 32 bytes). + /// * `iv`: Initialization Vector (must be 12 bytes). + /// * `encrypt`: Whether the instance will be used to encrypt (true) or + /// decrypt (false). + /// + /// Returns either Ok(chacha20poly1305) on success or Err(e) containing the + /// wolfSSL library error code value. + pub fn new(key: &[u8], iv: &[u8], encrypt: bool) -> Result { + if key.len() != Self::KEYSIZE { + return Err(sys::wolfCrypt_ErrorCodes_BUFFER_E); + } + if iv.len() != Self::IV_SIZE { + return Err(sys::wolfCrypt_ErrorCodes_BUFFER_E); + } + let mut wc_ccp: MaybeUninit = MaybeUninit::uninit(); + let rc = unsafe { + sys::wc_ChaCha20Poly1305_Init(wc_ccp.as_mut_ptr(), key.as_ptr(), + iv.as_ptr(), if encrypt {1} else {0}) + }; + if rc != 0 { + return Err(rc); + } + let wc_ccp = unsafe { wc_ccp.assume_init() }; + let chacha20poly1305 = ChaCha20Poly1305 { wc_ccp }; + Ok(chacha20poly1305) + } + + /// Update AAD (additional authenticated data). + /// + /// This function should be called before `update_data()`. + /// + /// # Parameters + /// + /// * `aad`: Additional authenticated data. + /// + /// # Returns + /// + /// Returns either Ok(()) on success or Err(e) containing the wolfSSL + /// library error code value. + pub fn update_aad(&mut self, aad: &[u8]) -> Result<(), i32> { + let aad_size = aad.len() as u32; + let rc = unsafe { + sys::wc_ChaCha20Poly1305_UpdateAad(&mut self.wc_ccp, + aad.as_ptr(), aad_size) + }; + if rc != 0 { + return Err(rc); + } + Ok(()) + } + + /// Update data (add additional input data to decrypt or encrypt). + /// + /// This function can be called multiple times. If AAD is used, the + /// `update_aad()` function must be called before this function. The + /// `finalize()` function should be called after adding all input data to + /// finalize the operation and compute the authentication tag. + /// + /// # Parameters + /// + /// * `din`: Additional input data to decrypt or encrypt. + /// * `dout`: Buffer in which to store output data (must be the same length + /// as the input buffer). + /// + /// # Returns + /// + /// Returns either Ok(()) on success or Err(e) containing the wolfSSL + /// library error code value. + pub fn update_data(&mut self, din: &[u8], dout: &mut [u8]) -> Result<(), i32> { + if din.len() != dout.len() { + return Err(sys::wolfCrypt_ErrorCodes_BUFFER_E); + } + let din_size = din.len() as u32; + let rc = unsafe { + sys::wc_ChaCha20Poly1305_UpdateData(&mut self.wc_ccp, + din.as_ptr(), dout.as_mut_ptr(), din_size) + }; + if rc != 0 { + return Err(rc); + } + Ok(()) + } + + /// Finalize the decrypt/encrypt operation. + /// + /// This function consumes the `ChaCha20Poly1305` instance. The + /// `update_data()` function must be called before calling this function to + /// add all input data. + /// + /// # Parameters + /// + /// * `auth_tag`: Output buffer for authentication tag (must be 16 bytes). + /// + /// # Returns + /// + /// Returns either Ok(()) on success or Err(e) containing the wolfSSL + /// library error code value. + pub fn finalize(mut self, auth_tag: &mut [u8]) -> Result<(), i32> { + if auth_tag.len() != Self::AUTH_TAG_SIZE { + return Err(sys::wolfCrypt_ErrorCodes_BUFFER_E); + } + let rc = unsafe { + sys::wc_ChaCha20Poly1305_Final(&mut self.wc_ccp, + auth_tag.as_mut_ptr()) + }; + if rc != 0 { + return Err(rc); + } + Ok(()) + } +} diff --git a/wrapper/rust/wolfssl-wolfcrypt/src/lib.rs b/wrapper/rust/wolfssl-wolfcrypt/src/lib.rs index 14f14ee351d..2e2b46eb9b5 100644 --- a/wrapper/rust/wolfssl-wolfcrypt/src/lib.rs +++ b/wrapper/rust/wolfssl-wolfcrypt/src/lib.rs @@ -23,6 +23,7 @@ pub mod sys; pub mod aes; pub mod blake2; +pub mod chacha20_poly1305; pub mod cmac; pub mod curve25519; pub mod dh; diff --git a/wrapper/rust/wolfssl-wolfcrypt/tests/test_chacha20_poly1305.rs b/wrapper/rust/wolfssl-wolfcrypt/tests/test_chacha20_poly1305.rs new file mode 100644 index 00000000000..5b6f740a4d1 --- /dev/null +++ b/wrapper/rust/wolfssl-wolfcrypt/tests/test_chacha20_poly1305.rs @@ -0,0 +1,205 @@ +#![cfg(chacha20_poly1305)] + +use wolfssl_wolfcrypt::chacha20_poly1305::*; + +#[test] +fn test_chacha20_poly1305_1() { + let key1 = [ + 0x80u8, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, + 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, + 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, + 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f + ]; + + let plaintext1 = [ + 0x4cu8, 0x61, 0x64, 0x69, 0x65, 0x73, 0x20, 0x61, + 0x6e, 0x64, 0x20, 0x47, 0x65, 0x6e, 0x74, 0x6c, + 0x65, 0x6d, 0x65, 0x6e, 0x20, 0x6f, 0x66, 0x20, + 0x74, 0x68, 0x65, 0x20, 0x63, 0x6c, 0x61, 0x73, + 0x73, 0x20, 0x6f, 0x66, 0x20, 0x27, 0x39, 0x39, + 0x3a, 0x20, 0x49, 0x66, 0x20, 0x49, 0x20, 0x63, + 0x6f, 0x75, 0x6c, 0x64, 0x20, 0x6f, 0x66, 0x66, + 0x65, 0x72, 0x20, 0x79, 0x6f, 0x75, 0x20, 0x6f, + 0x6e, 0x6c, 0x79, 0x20, 0x6f, 0x6e, 0x65, 0x20, + 0x74, 0x69, 0x70, 0x20, 0x66, 0x6f, 0x72, 0x20, + 0x74, 0x68, 0x65, 0x20, 0x66, 0x75, 0x74, 0x75, + 0x72, 0x65, 0x2c, 0x20, 0x73, 0x75, 0x6e, 0x73, + 0x63, 0x72, 0x65, 0x65, 0x6e, 0x20, 0x77, 0x6f, + 0x75, 0x6c, 0x64, 0x20, 0x62, 0x65, 0x20, 0x69, + 0x74, 0x2e + ]; + + let iv1 = [ + 0x07u8, 0x00, 0x00, 0x00, 0x40, 0x41, 0x42, 0x43, + 0x44, 0x45, 0x46, 0x47 + ]; + + let aad1 = [ + 0x50u8, 0x51, 0x52, 0x53, 0xc0, 0xc1, 0xc2, 0xc3, + 0xc4, 0xc5, 0xc6, 0xc7 + ]; + + let cipher1 = [ + 0xd3u8, 0x1a, 0x8d, 0x34, 0x64, 0x8e, 0x60, 0xdb, + 0x7b, 0x86, 0xaf, 0xbc, 0x53, 0xef, 0x7e, 0xc2, + 0xa4, 0xad, 0xed, 0x51, 0x29, 0x6e, 0x08, 0xfe, + 0xa9, 0xe2, 0xb5, 0xa7, 0x36, 0xee, 0x62, 0xd6, + 0x3d, 0xbe, 0xa4, 0x5e, 0x8c, 0xa9, 0x67, 0x12, + 0x82, 0xfa, 0xfb, 0x69, 0xda, 0x92, 0x72, 0x8b, + 0x1a, 0x71, 0xde, 0x0a, 0x9e, 0x06, 0x0b, 0x29, + 0x05, 0xd6, 0xa5, 0xb6, 0x7e, 0xcd, 0x3b, 0x36, + 0x92, 0xdd, 0xbd, 0x7f, 0x2d, 0x77, 0x8b, 0x8c, + 0x98, 0x03, 0xae, 0xe3, 0x28, 0x09, 0x1b, 0x58, + 0xfa, 0xb3, 0x24, 0xe4, 0xfa, 0xd6, 0x75, 0x94, + 0x55, 0x85, 0x80, 0x8b, 0x48, 0x31, 0xd7, 0xbc, + 0x3f, 0xf4, 0xde, 0xf0, 0x8e, 0x4b, 0x7a, 0x9d, + 0xe5, 0x76, 0xd2, 0x65, 0x86, 0xce, 0xc6, 0x4b, + 0x61, 0x16 + ]; + + let auth_tag_1 = [ + 0x1au8, 0xe1, 0x0b, 0x59, 0x4f, 0x09, 0xe2, 0x6a, + 0x7e, 0x90, 0x2e, 0xcb, 0xd0, 0x60, 0x06, 0x91 + ]; + + /* Encrypt */ + let mut ccp = ChaCha20Poly1305::new(&key1, &iv1, true).expect("Error with new()"); + ccp.update_aad(&aad1).expect("Error with update_aad()"); + let mut out_cipher1 = [0u8; 114]; + ccp.update_data(&plaintext1, &mut out_cipher1).expect("Error with update_data()"); + let mut out_auth_tag_1 = [0u8; ChaCha20Poly1305::AUTH_TAG_SIZE]; + ccp.finalize(&mut out_auth_tag_1).expect("Error with finalize()"); + assert_eq!(out_cipher1, cipher1); + assert_eq!(out_auth_tag_1, auth_tag_1); + + /* Decrypt */ + let mut ccp = ChaCha20Poly1305::new(&key1, &iv1, false).expect("Error with new()"); + ccp.update_aad(&aad1).expect("Error with update_aad()"); + let mut out_plaintext1 = [0u8; 114]; + ccp.update_data(&cipher1, &mut out_plaintext1).expect("Error with update_data()"); + let mut out_auth_tag_1 = [0u8; ChaCha20Poly1305::AUTH_TAG_SIZE]; + ccp.finalize(&mut out_auth_tag_1).expect("Error with finalize()"); + assert_eq!(out_plaintext1, plaintext1); + assert_eq!(out_auth_tag_1, auth_tag_1); +} + +#[test] +fn test_chacha20_poly1305_2() { + let key2 = [ + 0x1cu8, 0x92, 0x40, 0xa5, 0xeb, 0x55, 0xd3, 0x8a, + 0xf3, 0x33, 0x88, 0x86, 0x04, 0xf6, 0xb5, 0xf0, + 0x47, 0x39, 0x17, 0xc1, 0x40, 0x2b, 0x80, 0x09, + 0x9d, 0xca, 0x5c, 0xbc, 0x20, 0x70, 0x75, 0xc0 + ]; + + let plaintext2 = [ + 0x49u8, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, + 0x2d, 0x44, 0x72, 0x61, 0x66, 0x74, 0x73, 0x20, + 0x61, 0x72, 0x65, 0x20, 0x64, 0x72, 0x61, 0x66, + 0x74, 0x20, 0x64, 0x6f, 0x63, 0x75, 0x6d, 0x65, + 0x6e, 0x74, 0x73, 0x20, 0x76, 0x61, 0x6c, 0x69, + 0x64, 0x20, 0x66, 0x6f, 0x72, 0x20, 0x61, 0x20, + 0x6d, 0x61, 0x78, 0x69, 0x6d, 0x75, 0x6d, 0x20, + 0x6f, 0x66, 0x20, 0x73, 0x69, 0x78, 0x20, 0x6d, + 0x6f, 0x6e, 0x74, 0x68, 0x73, 0x20, 0x61, 0x6e, + 0x64, 0x20, 0x6d, 0x61, 0x79, 0x20, 0x62, 0x65, + 0x20, 0x75, 0x70, 0x64, 0x61, 0x74, 0x65, 0x64, + 0x2c, 0x20, 0x72, 0x65, 0x70, 0x6c, 0x61, 0x63, + 0x65, 0x64, 0x2c, 0x20, 0x6f, 0x72, 0x20, 0x6f, + 0x62, 0x73, 0x6f, 0x6c, 0x65, 0x74, 0x65, 0x64, + 0x20, 0x62, 0x79, 0x20, 0x6f, 0x74, 0x68, 0x65, + 0x72, 0x20, 0x64, 0x6f, 0x63, 0x75, 0x6d, 0x65, + 0x6e, 0x74, 0x73, 0x20, 0x61, 0x74, 0x20, 0x61, + 0x6e, 0x79, 0x20, 0x74, 0x69, 0x6d, 0x65, 0x2e, + 0x20, 0x49, 0x74, 0x20, 0x69, 0x73, 0x20, 0x69, + 0x6e, 0x61, 0x70, 0x70, 0x72, 0x6f, 0x70, 0x72, + 0x69, 0x61, 0x74, 0x65, 0x20, 0x74, 0x6f, 0x20, + 0x75, 0x73, 0x65, 0x20, 0x49, 0x6e, 0x74, 0x65, + 0x72, 0x6e, 0x65, 0x74, 0x2d, 0x44, 0x72, 0x61, + 0x66, 0x74, 0x73, 0x20, 0x61, 0x73, 0x20, 0x72, + 0x65, 0x66, 0x65, 0x72, 0x65, 0x6e, 0x63, 0x65, + 0x20, 0x6d, 0x61, 0x74, 0x65, 0x72, 0x69, 0x61, + 0x6c, 0x20, 0x6f, 0x72, 0x20, 0x74, 0x6f, 0x20, + 0x63, 0x69, 0x74, 0x65, 0x20, 0x74, 0x68, 0x65, + 0x6d, 0x20, 0x6f, 0x74, 0x68, 0x65, 0x72, 0x20, + 0x74, 0x68, 0x61, 0x6e, 0x20, 0x61, 0x73, 0x20, + 0x2f, 0xe2, 0x80, 0x9c, 0x77, 0x6f, 0x72, 0x6b, + 0x20, 0x69, 0x6e, 0x20, 0x70, 0x72, 0x6f, 0x67, + 0x72, 0x65, 0x73, 0x73, 0x2e, 0x2f, 0xe2, 0x80, + 0x9d + ]; + + let iv2 = [ + 0x00u8, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, + 0x05, 0x06, 0x07, 0x08 + ]; + + let aad2 = [ + 0xf3u8, 0x33, 0x88, 0x86, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x4e, 0x91 + ]; + + let cipher2 = [ + 0x64u8, 0xa0, 0x86, 0x15, 0x75, 0x86, 0x1a, 0xf4, + 0x60, 0xf0, 0x62, 0xc7, 0x9b, 0xe6, 0x43, 0xbd, + 0x5e, 0x80, 0x5c, 0xfd, 0x34, 0x5c, 0xf3, 0x89, + 0xf1, 0x08, 0x67, 0x0a, 0xc7, 0x6c, 0x8c, 0xb2, + 0x4c, 0x6c, 0xfc, 0x18, 0x75, 0x5d, 0x43, 0xee, + 0xa0, 0x9e, 0xe9, 0x4e, 0x38, 0x2d, 0x26, 0xb0, + 0xbd, 0xb7, 0xb7, 0x3c, 0x32, 0x1b, 0x01, 0x00, + 0xd4, 0xf0, 0x3b, 0x7f, 0x35, 0x58, 0x94, 0xcf, + 0x33, 0x2f, 0x83, 0x0e, 0x71, 0x0b, 0x97, 0xce, + 0x98, 0xc8, 0xa8, 0x4a, 0xbd, 0x0b, 0x94, 0x81, + 0x14, 0xad, 0x17, 0x6e, 0x00, 0x8d, 0x33, 0xbd, + 0x60, 0xf9, 0x82, 0xb1, 0xff, 0x37, 0xc8, 0x55, + 0x97, 0x97, 0xa0, 0x6e, 0xf4, 0xf0, 0xef, 0x61, + 0xc1, 0x86, 0x32, 0x4e, 0x2b, 0x35, 0x06, 0x38, + 0x36, 0x06, 0x90, 0x7b, 0x6a, 0x7c, 0x02, 0xb0, + 0xf9, 0xf6, 0x15, 0x7b, 0x53, 0xc8, 0x67, 0xe4, + 0xb9, 0x16, 0x6c, 0x76, 0x7b, 0x80, 0x4d, 0x46, + 0xa5, 0x9b, 0x52, 0x16, 0xcd, 0xe7, 0xa4, 0xe9, + 0x90, 0x40, 0xc5, 0xa4, 0x04, 0x33, 0x22, 0x5e, + 0xe2, 0x82, 0xa1, 0xb0, 0xa0, 0x6c, 0x52, 0x3e, + 0xaf, 0x45, 0x34, 0xd7, 0xf8, 0x3f, 0xa1, 0x15, + 0x5b, 0x00, 0x47, 0x71, 0x8c, 0xbc, 0x54, 0x6a, + 0x0d, 0x07, 0x2b, 0x04, 0xb3, 0x56, 0x4e, 0xea, + 0x1b, 0x42, 0x22, 0x73, 0xf5, 0x48, 0x27, 0x1a, + 0x0b, 0xb2, 0x31, 0x60, 0x53, 0xfa, 0x76, 0x99, + 0x19, 0x55, 0xeb, 0xd6, 0x31, 0x59, 0x43, 0x4e, + 0xce, 0xbb, 0x4e, 0x46, 0x6d, 0xae, 0x5a, 0x10, + 0x73, 0xa6, 0x72, 0x76, 0x27, 0x09, 0x7a, 0x10, + 0x49, 0xe6, 0x17, 0xd9, 0x1d, 0x36, 0x10, 0x94, + 0xfa, 0x68, 0xf0, 0xff, 0x77, 0x98, 0x71, 0x30, + 0x30, 0x5b, 0xea, 0xba, 0x2e, 0xda, 0x04, 0xdf, + 0x99, 0x7b, 0x71, 0x4d, 0x6c, 0x6f, 0x2c, 0x29, + 0xa6, 0xad, 0x5c, 0xb4, 0x02, 0x2b, 0x02, 0x70, + 0x9b + ]; + + let auth_tag_2 = [ + 0xeeu8, 0xad, 0x9d, 0x67, 0x89, 0x0c, 0xbb, 0x22, + 0x39, 0x23, 0x36, 0xfe, 0xa1, 0x85, 0x1f, 0x38 + ]; + + /* Encrypt */ + let mut ccp = ChaCha20Poly1305::new(&key2, &iv2, true).expect("Error with new()"); + ccp.update_aad(&aad2).expect("Error with update_aad()"); + let mut out_cipher2 = [0u8; 265]; + ccp.update_data(&plaintext2[0..128], &mut out_cipher2[0..128]).expect("Error with update_data()"); + ccp.update_data(&plaintext2[128..265], &mut out_cipher2[128..265]).expect("Error with update_data()"); + let mut out_auth_tag_2 = [0u8; ChaCha20Poly1305::AUTH_TAG_SIZE]; + ccp.finalize(&mut out_auth_tag_2).expect("Error with finalize()"); + assert_eq!(out_cipher2, cipher2); + assert_eq!(out_auth_tag_2, auth_tag_2); + + /* Decrypt */ + let mut ccp = ChaCha20Poly1305::new(&key2, &iv2, false).expect("Error with new()"); + ccp.update_aad(&aad2).expect("Error with update_aad()"); + let mut out_plaintext2 = [0u8; 265]; + ccp.update_data(&cipher2[0..128], &mut out_plaintext2[0..128]).expect("Error with update_data()"); + ccp.update_data(&cipher2[128..265], &mut out_plaintext2[128..265]).expect("Error with update_data()"); + let mut out_auth_tag_2 = [0u8; ChaCha20Poly1305::AUTH_TAG_SIZE]; + ccp.finalize(&mut out_auth_tag_2).expect("Error with finalize()"); + assert_eq!(out_plaintext2, plaintext2); + assert_eq!(out_auth_tag_2, auth_tag_2); +}