// This file is dual-licensed.  Choose whichever licence you want from
// the two licences listed below.
//
// The first licence is a regular 2-clause BSD licence.  The second licence
// is the CC-0 from Creative Commons. It is intended to release Monocypher
// to the public domain.  The BSD licence serves as a fallback option.
//
// SPDX-License-Identifier: BSD-2-Clause OR CC0-1.0
//
// ------------------------------------------------------------------------
//
// Copyright (c) 2017-2019, Loup Vaillant
// 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
// HOLDER 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.
//
// ------------------------------------------------------------------------
//
// Written in 2017-2019 by Loup Vaillant
//
// To the extent possible under law, the author(s) have dedicated all copyright
// and related neighboring rights to this software to the public domain
// worldwide.  This software is distributed without any warranty.
//
// You should have received a copy of the CC0 Public Domain Dedication along
// with this software.  If not, see
// <https://creativecommons.org/publicdomain/zero/1.0/>

#include "speed.h"
#include "sodium.h"

static u64 chacha20(void)
{
	u8 out[SIZE];
	RANDOM_INPUT(in   , SIZE);
	RANDOM_INPUT(key  ,   32);
	RANDOM_INPUT(nonce,    8);

	TIMING_START {
		crypto_stream_chacha20_xor(out, in, SIZE, nonce, key);
	}
	TIMING_END;
}

static u64 poly1305(void)
{
	u8 out[16];
	RANDOM_INPUT(in , SIZE);
	RANDOM_INPUT(key,   32);

	TIMING_START {
		crypto_onetimeauth(out, in, SIZE, key);
	}
	TIMING_END;
}

static u64 authenticated(void)
{
	u8 out[SIZE];
	u8 mac[crypto_aead_xchacha20poly1305_ietf_ABYTES];
	RANDOM_INPUT(in   , SIZE);
	RANDOM_INPUT(key  ,   32);
	RANDOM_INPUT(nonce,   24);

	TIMING_START {
		crypto_aead_xchacha20poly1305_ietf_encrypt_detached(
			out, mac, 0, in, SIZE, 0, 0, 0, nonce, key);
	}
	TIMING_END;
}

static u64 blake2b(void)
{
	u8 hash[64];
	RANDOM_INPUT(in , SIZE);
	RANDOM_INPUT(key,   32);

	TIMING_START {
		crypto_generichash(hash, 64, in, SIZE, key, 32);
	}
	TIMING_END;
}

static u64 sha512(void)
{
	u8 hash[64];
	RANDOM_INPUT(in, SIZE);

	TIMING_START {
		crypto_hash_sha512(hash, in, SIZE);
	}
	TIMING_END;
}

static u64 argon2i(void)
{
	u8 hash [32];
	RANDOM_INPUT(password,  16);
	RANDOM_INPUT(salt    ,  16);

	TIMING_START {
		if (crypto_pwhash(hash, 32, (char*)password, 16, salt,
		                  3, SIZE, crypto_pwhash_ALG_ARGON2I13)) {
			fprintf(stderr, "Argon2i failed.\n");
		}
	}
	TIMING_END;
}

static u64 x25519(void)
{
	u8 in [32] = {9};
	u8 out[32] = {9};

	TIMING_START {
		if (crypto_scalarmult(out, out, in)) {
			fprintf(stderr, "libsodium rejected the public key\n");
		}
	}
	TIMING_END;
}

static u64 edDSA_sign(void)
{
	u8 sk       [64];
	u8 pk       [32];
	u8 signature[64];
	RANDOM_INPUT(message, 64);
	crypto_sign_keypair(pk, sk);

	TIMING_START {
		crypto_sign_detached(signature, 0, message, 64, sk);
	}
	TIMING_END;
}

static u64 edDSA_check(void)
{
	u8 sk       [64];
	u8 pk       [32];
	u8 signature[64];
	RANDOM_INPUT(message, 64);
	crypto_sign_keypair(pk, sk);
	crypto_sign_detached(signature, 0, message, 64, sk);

	TIMING_START {
		if (crypto_sign_verify_detached(signature, message, 64, pk)) {
			printf("libsodium verification failed\n");
		}
	}
	TIMING_END;
}

int main()
{
	SODIUM_INIT;
	print("Chacha20         ",chacha20()     *MUL,"megabytes  per second");
	print("Poly1305         ",poly1305()     *MUL,"megabytes  per second");
	print("Auth'd encryption",authenticated()*MUL,"megabytes  per second");
	print("BLAKE2b          ",blake2b()      *MUL,"megabytes  per second");
	print("SHA-512          ",sha512()       *MUL,"megabytes  per second");
	print("Argon2i, 3 passes",argon2i()      *MUL,"megabytes  per second");
	print("x25519           ",x25519()           ,"exchanges  per second");
	print("EdDSA(sign)      ",edDSA_sign()       ,"signatures per second");
	print("EdDSA(check)     ",edDSA_check()      ,"checks     per second");
	printf("\n");
	return 0;
}