/*      $OpenBSD: chachatest.c,v 1.6 2019/01/22 00:59:21 dlg Exp $      */
/*
 * Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
 *
 * 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.
 */

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <openssl/chacha.h>

struct chacha_tv {
        const char *desc;
        const unsigned char key[32];
        const unsigned char iv[8];
        const size_t len;
        const unsigned char out[512];
};

/*
 * Test vectors from:
 *   http://tools.ietf.org/html/draft-strombergson-chacha-test-vectors-01
 */
struct chacha_tv chacha_test_vectors[] = {
        {
                "TC1: All zero key and IV",
                {
                        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                },
                {
                        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                },
                64,
                {
                        0x76, 0xb8, 0xe0, 0xad, 0xa0, 0xf1, 0x3d, 0x90,
                        0x40, 0x5d, 0x6a, 0xe5, 0x53, 0x86, 0xbd, 0x28,
                        0xbd, 0xd2, 0x19, 0xb8, 0xa0, 0x8d, 0xed, 0x1a,
                        0xa8, 0x36, 0xef, 0xcc, 0x8b, 0x77, 0x0d, 0xc7,
                        0xda, 0x41, 0x59, 0x7c, 0x51, 0x57, 0x48, 0x8d,
                        0x77, 0x24, 0xe0, 0x3f, 0xb8, 0xd8, 0x4a, 0x37,
                        0x6a, 0x43, 0xb8, 0xf4, 0x15, 0x18, 0xa1, 0x1c,
                        0xc3, 0x87, 0xb6, 0x69, 0xb2, 0xee, 0x65, 0x86,
                },
        },
        {
                "TC2: Single bit in key set, all zero IV",
                {
                        0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                },
                {
                        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                },
                64,
                {
                        0xc5, 0xd3, 0x0a, 0x7c, 0xe1, 0xec, 0x11, 0x93,
                        0x78, 0xc8, 0x4f, 0x48, 0x7d, 0x77, 0x5a, 0x85,
                        0x42, 0xf1, 0x3e, 0xce, 0x23, 0x8a, 0x94, 0x55,
                        0xe8, 0x22, 0x9e, 0x88, 0x8d, 0xe8, 0x5b, 0xbd,
                        0x29, 0xeb, 0x63, 0xd0, 0xa1, 0x7a, 0x5b, 0x99,
                        0x9b, 0x52, 0xda, 0x22, 0xbe, 0x40, 0x23, 0xeb,
                        0x07, 0x62, 0x0a, 0x54, 0xf6, 0xfa, 0x6a, 0xd8,
                        0x73, 0x7b, 0x71, 0xeb, 0x04, 0x64, 0xda, 0xc0,
                },
        },
        {
                "TC3: Single bit in IV set, all zero key",
                {
                        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                },
                {
                        0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                },
                64,
                {
                        0xef, 0x3f, 0xdf, 0xd6, 0xc6, 0x15, 0x78, 0xfb,
                        0xf5, 0xcf, 0x35, 0xbd, 0x3d, 0xd3, 0x3b, 0x80,
                        0x09, 0x63, 0x16, 0x34, 0xd2, 0x1e, 0x42, 0xac,
                        0x33, 0x96, 0x0b, 0xd1, 0x38, 0xe5, 0x0d, 0x32,
                        0x11, 0x1e, 0x4c, 0xaf, 0x23, 0x7e, 0xe5, 0x3c,
                        0xa8, 0xad, 0x64, 0x26, 0x19, 0x4a, 0x88, 0x54,
                        0x5d, 0xdc, 0x49, 0x7a, 0x0b, 0x46, 0x6e, 0x7d,
                        0x6b, 0xbd, 0xb0, 0x04, 0x1b, 0x2f, 0x58, 0x6b
                },
        },
        {
                "TC4: All bits in key and IV are set",
                {
                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
                },
                {
                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
                },
                64,
                {
                        0xd9, 0xbf, 0x3f, 0x6b, 0xce, 0x6e, 0xd0, 0xb5,
                        0x42, 0x54, 0x55, 0x77, 0x67, 0xfb, 0x57, 0x44,
                        0x3d, 0xd4, 0x77, 0x89, 0x11, 0xb6, 0x06, 0x05,
                        0x5c, 0x39, 0xcc, 0x25, 0xe6, 0x74, 0xb8, 0x36,
                        0x3f, 0xea, 0xbc, 0x57, 0xfd, 0xe5, 0x4f, 0x79,
                        0x0c, 0x52, 0xc8, 0xae, 0x43, 0x24, 0x0b, 0x79,
                        0xd4, 0x90, 0x42, 0xb7, 0x77, 0xbf, 0xd6, 0xcb,
                        0x80, 0xe9, 0x31, 0x27, 0x0b, 0x7f, 0x50, 0xeb,
                },
        },
        {
                "TC5: Every even bit set in key and IV",
                {
                        0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
                        0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
                        0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
                        0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
                },
                {
                        0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55,
                },
                64,
                {
                        0xbe, 0xa9, 0x41, 0x1a, 0xa4, 0x53, 0xc5, 0x43,
                        0x4a, 0x5a, 0xe8, 0xc9, 0x28, 0x62, 0xf5, 0x64,
                        0x39, 0x68, 0x55, 0xa9, 0xea, 0x6e, 0x22, 0xd6,
                        0xd3, 0xb5, 0x0a, 0xe1, 0xb3, 0x66, 0x33, 0x11,
                        0xa4, 0xa3, 0x60, 0x6c, 0x67, 0x1d, 0x60, 0x5c,
                        0xe1, 0x6c, 0x3a, 0xec, 0xe8, 0xe6, 0x1e, 0xa1,
                        0x45, 0xc5, 0x97, 0x75, 0x01, 0x7b, 0xee, 0x2f,
                        0xa6, 0xf8, 0x8a, 0xfc, 0x75, 0x80, 0x69, 0xf7,
                },
        },
        {
                "TC6: Every odd bit set in key and IV",
                {
                        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
                        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
                        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
                        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
                },
                {
                        0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
                },
                64,
                {
                        0x9a, 0xa2, 0xa9, 0xf6, 0x56, 0xef, 0xde, 0x5a,
                        0xa7, 0x59, 0x1c, 0x5f, 0xed, 0x4b, 0x35, 0xae,
                        0xa2, 0x89, 0x5d, 0xec, 0x7c, 0xb4, 0x54, 0x3b,
                        0x9e, 0x9f, 0x21, 0xf5, 0xe7, 0xbc, 0xbc, 0xf3,
                        0xc4, 0x3c, 0x74, 0x8a, 0x97, 0x08, 0x88, 0xf8,
                        0x24, 0x83, 0x93, 0xa0, 0x9d, 0x43, 0xe0, 0xb7,
                        0xe1, 0x64, 0xbc, 0x4d, 0x0b, 0x0f, 0xb2, 0x40,
                        0xa2, 0xd7, 0x21, 0x15, 0xc4, 0x80, 0x89, 0x06,
                },
        },
        {
                "TC7: Sequence patterns in key and IV",
                {
                        0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
                        0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
                        0xff, 0xee, 0xdd, 0xcc, 0xbb, 0xaa, 0x99, 0x88,
                        0x77, 0x66, 0x55, 0x44, 0x33, 0x22, 0x11, 0x00,
                },
                {
                        0x0f, 0x1e, 0x2d, 0x3c, 0x4b, 0x5a, 0x69, 0x78,
                },
                64,
                {
                        0x9f, 0xad, 0xf4, 0x09, 0xc0, 0x08, 0x11, 0xd0,
                        0x04, 0x31, 0xd6, 0x7e, 0xfb, 0xd8, 0x8f, 0xba,
                        0x59, 0x21, 0x8d, 0x5d, 0x67, 0x08, 0xb1, 0xd6,
                        0x85, 0x86, 0x3f, 0xab, 0xbb, 0x0e, 0x96, 0x1e,
                        0xea, 0x48, 0x0f, 0xd6, 0xfb, 0x53, 0x2b, 0xfd,
                        0x49, 0x4b, 0x21, 0x51, 0x01, 0x50, 0x57, 0x42,
                        0x3a, 0xb6, 0x0a, 0x63, 0xfe, 0x4f, 0x55, 0xf7,
                        0xa2, 0x12, 0xe2, 0x16, 0x7c, 0xca, 0xb9, 0x31,
                },
        },
        {
                "TC8: key: 'All your base are belong to us!, IV: 'IETF2013'",
                {
                        0xc4, 0x6e, 0xc1, 0xb1, 0x8c, 0xe8, 0xa8, 0x78,
                        0x72, 0x5a, 0x37, 0xe7, 0x80, 0xdf, 0xb7, 0x35,
                        0x1f, 0x68, 0xed, 0x2e, 0x19, 0x4c, 0x79, 0xfb,
                        0xc6, 0xae, 0xbe, 0xe1, 0xa6, 0x67, 0x97, 0x5d,
                },
                {
                        0x1a, 0xda, 0x31, 0xd5, 0xcf, 0x68, 0x82, 0x21,
                },
                64,
                {
                        0xf6, 0x3a, 0x89, 0xb7, 0x5c, 0x22, 0x71, 0xf9,
                        0x36, 0x88, 0x16, 0x54, 0x2b, 0xa5, 0x2f, 0x06,
                        0xed, 0x49, 0x24, 0x17, 0x92, 0x30, 0x2b, 0x00,
                        0xb5, 0xe8, 0xf8, 0x0a, 0xe9, 0xa4, 0x73, 0xaf,
                        0xc2, 0x5b, 0x21, 0x8f, 0x51, 0x9a, 0xf0, 0xfd,
                        0xd4, 0x06, 0x36, 0x2e, 0x8d, 0x69, 0xde, 0x7f,
                        0x54, 0xc6, 0x04, 0xa6, 0xe0, 0x0f, 0x35, 0x3f,
                        0x11, 0x0f, 0x77, 0x1b, 0xdc, 0xa8, 0xab, 0x92,
                },
        },
};

#define N_VECTORS (sizeof(chacha_test_vectors) / sizeof(*chacha_test_vectors))

/* Single-shot ChaCha20 using CRYPTO_chacha_20 interface. */
static void
crypto_chacha_20_test(struct chacha_tv *tv, unsigned char *out,
    unsigned char *in)
{
        CRYPTO_chacha_20(out, in, tv->len, tv->key, tv->iv, 0);
}

/* Single-shot ChaCha20 using the ChaCha interface. */
static void
chacha_ctx_full_test(struct chacha_tv *tv, unsigned char *out,
    unsigned char *in)
{
        ChaCha_ctx ctx;

        ChaCha_set_key(&ctx, tv->key, 256);
        ChaCha_set_iv(&ctx, tv->iv, NULL);
        ChaCha(&ctx, out, in, tv->len);
}

/* ChaCha20 with partial writes using the Chacha interface. */
static void
chacha_ctx_partial_test(struct chacha_tv *tv, unsigned char *out,
    unsigned char *in)
{
        ChaCha_ctx ctx;
        int len, size = 0;

        ChaCha_set_key(&ctx, tv->key, 256);
        ChaCha_set_iv(&ctx, tv->iv, NULL);
        len = tv->len - 1;
        while (len > 1) {
                size = len / 2;
                ChaCha(&ctx, out, in, size);
                in += size;
                out += size;
                len -= size;
        }
        ChaCha(&ctx, out, in, len + 1);
}

/* ChaCha20 with single byte writes using the Chacha interface. */
static void
chacha_ctx_single_test(struct chacha_tv *tv, unsigned char *out,
    unsigned char *in)
{
        ChaCha_ctx ctx;
        size_t i;

        ChaCha_set_key(&ctx, tv->key, 256);
        ChaCha_set_iv(&ctx, tv->iv, NULL);
        for (i = 0; i < tv->len; i++)
                ChaCha(&ctx, out + i, in + i, 1);
}

struct chacha_test_function {
        char *name;
        void (*func)(struct chacha_tv *, unsigned char *, unsigned char *);
};

struct chacha_test_function chacha_test_functions[] = {
        {"crypto_chacha_20_test", crypto_chacha_20_test},
        {"chacha_ctx_full_test", chacha_ctx_full_test},
        {"chacha_ctx_partial_test", chacha_ctx_partial_test},
        {"chacha_ctx_single_test", chacha_ctx_single_test},
};

#define N_FUNCS (sizeof(chacha_test_functions) / sizeof(*chacha_test_functions))

/* draft-arciszewski-xchacha-02 test vectors */
static int
crypto_hchacha_20_test(void)
{
        static const unsigned char key[32] = {
                0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
                0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
                0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
                0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f
        };
        static const unsigned char nonce[16] = {
                0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00, 0x4a,
                0x00, 0x00, 0x00, 0x00, 0x31, 0x41, 0x59, 0x27,
        };
        static const unsigned char result[32] = {
                0x82, 0x41, 0x3b, 0x42, 0x27, 0xb2, 0x7b, 0xfe,
                0xd3, 0x0e, 0x42, 0x50, 0x8a, 0x87, 0x7d, 0x73,
                0xa0, 0xf9, 0xe4, 0xd5, 0x8a, 0x74, 0xa8, 0x53,
                0xc1, 0x2e, 0xc4, 0x13, 0x26, 0xd3, 0xec, 0xdc,
        };
        unsigned char out[32];
        int failed = 0;
        size_t k;

        CRYPTO_hchacha_20(out, key, nonce);

        if (memcmp(out, result, sizeof(out)) != 0) {
                printf("HChaCha20 failed!\n");

                printf("Got:\t");
                for (k = 0; k < sizeof(out); k++)
                        printf("%2.2x", out[k]);
                printf("\n");

                printf("Want:\t");
                for (k = 0; k < sizeof(result); k++)
                        printf("%2.2x", result[k]);
                printf("\n");

                failed = 1;
        }

        return (failed);
}

static int
crypto_xchacha_20_test(void)
{
        static const unsigned char key[32] = {
                0x80, 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,
        };
        static const unsigned char iv[24] = {
                0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
                0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
                0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x58
        };
        static const unsigned char plain[] = {
                0x54, 0x68, 0x65, 0x20, 0x64, 0x68, 0x6f, 0x6c,
                0x65, 0x20, 0x28, 0x70, 0x72, 0x6f, 0x6e, 0x6f,
                0x75, 0x6e, 0x63, 0x65, 0x64, 0x20, 0x22, 0x64,
                0x6f, 0x6c, 0x65, 0x22, 0x29, 0x20, 0x69, 0x73,
                0x20, 0x61, 0x6c, 0x73, 0x6f, 0x20, 0x6b, 0x6e,
                0x6f, 0x77, 0x6e, 0x20, 0x61, 0x73, 0x20, 0x74,
                0x68, 0x65, 0x20, 0x41, 0x73, 0x69, 0x61, 0x74,
                0x69, 0x63, 0x20, 0x77, 0x69, 0x6c, 0x64, 0x20,
                0x64, 0x6f, 0x67, 0x2c, 0x20, 0x72, 0x65, 0x64,
                0x20, 0x64, 0x6f, 0x67, 0x2c, 0x20, 0x61, 0x6e,
                0x64, 0x20, 0x77, 0x68, 0x69, 0x73, 0x74, 0x6c,
                0x69, 0x6e, 0x67, 0x20, 0x64, 0x6f, 0x67, 0x2e,
                0x20, 0x49, 0x74, 0x20, 0x69, 0x73, 0x20, 0x61,
                0x62, 0x6f, 0x75, 0x74, 0x20, 0x74, 0x68, 0x65,
                0x20, 0x73, 0x69, 0x7a, 0x65, 0x20, 0x6f, 0x66,
                0x20, 0x61, 0x20, 0x47, 0x65, 0x72, 0x6d, 0x61,
                0x6e, 0x20, 0x73, 0x68, 0x65, 0x70, 0x68, 0x65,
                0x72, 0x64, 0x20, 0x62, 0x75, 0x74, 0x20, 0x6c,
                0x6f, 0x6f, 0x6b, 0x73, 0x20, 0x6d, 0x6f, 0x72,
                0x65, 0x20, 0x6c, 0x69, 0x6b, 0x65, 0x20, 0x61,
                0x20, 0x6c, 0x6f, 0x6e, 0x67, 0x2d, 0x6c, 0x65,
                0x67, 0x67, 0x65, 0x64, 0x20, 0x66, 0x6f, 0x78,
                0x2e, 0x20, 0x54, 0x68, 0x69, 0x73, 0x20, 0x68,
                0x69, 0x67, 0x68, 0x6c, 0x79, 0x20, 0x65, 0x6c,
                0x75, 0x73, 0x69, 0x76, 0x65, 0x20, 0x61, 0x6e,
                0x64, 0x20, 0x73, 0x6b, 0x69, 0x6c, 0x6c, 0x65,
                0x64, 0x20, 0x6a, 0x75, 0x6d, 0x70, 0x65, 0x72,
                0x20, 0x69, 0x73, 0x20, 0x63, 0x6c, 0x61, 0x73,
                0x73, 0x69, 0x66, 0x69, 0x65, 0x64, 0x20, 0x77,
                0x69, 0x74, 0x68, 0x20, 0x77, 0x6f, 0x6c, 0x76,
                0x65, 0x73, 0x2c, 0x20, 0x63, 0x6f, 0x79, 0x6f,
                0x74, 0x65, 0x73, 0x2c, 0x20, 0x6a, 0x61, 0x63,
                0x6b, 0x61, 0x6c, 0x73, 0x2c, 0x20, 0x61, 0x6e,
                0x64, 0x20, 0x66, 0x6f, 0x78, 0x65, 0x73, 0x20,
                0x69, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x74,
                0x61, 0x78, 0x6f, 0x6e, 0x6f, 0x6d, 0x69, 0x63,
                0x20, 0x66, 0x61, 0x6d, 0x69, 0x6c, 0x79, 0x20,
                0x43, 0x61, 0x6e, 0x69, 0x64, 0x61, 0x65, 0x2e,
        };
        static const unsigned char cipher[] = {
                0x45, 0x59, 0xab, 0xba, 0x4e, 0x48, 0xc1, 0x61,
                0x02, 0xe8, 0xbb, 0x2c, 0x05, 0xe6, 0x94, 0x7f,
                0x50, 0xa7, 0x86, 0xde, 0x16, 0x2f, 0x9b, 0x0b,
                0x7e, 0x59, 0x2a, 0x9b, 0x53, 0xd0, 0xd4, 0xe9,
                0x8d, 0x8d, 0x64, 0x10, 0xd5, 0x40, 0xa1, 0xa6,
                0x37, 0x5b, 0x26, 0xd8, 0x0d, 0xac, 0xe4, 0xfa,
                0xb5, 0x23, 0x84, 0xc7, 0x31, 0xac, 0xbf, 0x16,
                0xa5, 0x92, 0x3c, 0x0c, 0x48, 0xd3, 0x57, 0x5d,
                0x4d, 0x0d, 0x2c, 0x67, 0x3b, 0x66, 0x6f, 0xaa,
                0x73, 0x10, 0x61, 0x27, 0x77, 0x01, 0x09, 0x3a,
                0x6b, 0xf7, 0xa1, 0x58, 0xa8, 0x86, 0x42, 0x92,
                0xa4, 0x1c, 0x48, 0xe3, 0xa9, 0xb4, 0xc0, 0xda,
                0xec, 0xe0, 0xf8, 0xd9, 0x8d, 0x0d, 0x7e, 0x05,
                0xb3, 0x7a, 0x30, 0x7b, 0xbb, 0x66, 0x33, 0x31,
                0x64, 0xec, 0x9e, 0x1b, 0x24, 0xea, 0x0d, 0x6c,
                0x3f, 0xfd, 0xdc, 0xec, 0x4f, 0x68, 0xe7, 0x44,
                0x30, 0x56, 0x19, 0x3a, 0x03, 0xc8, 0x10, 0xe1,
                0x13, 0x44, 0xca, 0x06, 0xd8, 0xed, 0x8a, 0x2b,
                0xfb, 0x1e, 0x8d, 0x48, 0xcf, 0xa6, 0xbc, 0x0e,
                0xb4, 0xe2, 0x46, 0x4b, 0x74, 0x81, 0x42, 0x40,
                0x7c, 0x9f, 0x43, 0x1a, 0xee, 0x76, 0x99, 0x60,
                0xe1, 0x5b, 0xa8, 0xb9, 0x68, 0x90, 0x46, 0x6e,
                0xf2, 0x45, 0x75, 0x99, 0x85, 0x23, 0x85, 0xc6,
                0x61, 0xf7, 0x52, 0xce, 0x20, 0xf9, 0xda, 0x0c,
                0x09, 0xab, 0x6b, 0x19, 0xdf, 0x74, 0xe7, 0x6a,
                0x95, 0x96, 0x74, 0x46, 0xf8, 0xd0, 0xfd, 0x41,
                0x5e, 0x7b, 0xee, 0x2a, 0x12, 0xa1, 0x14, 0xc2,
                0x0e, 0xb5, 0x29, 0x2a, 0xe7, 0xa3, 0x49, 0xae,
                0x57, 0x78, 0x20, 0xd5, 0x52, 0x0a, 0x1f, 0x3f,
                0xb6, 0x2a, 0x17, 0xce, 0x6a, 0x7e, 0x68, 0xfa,
                0x7c, 0x79, 0x11, 0x1d, 0x88, 0x60, 0x92, 0x0b,
                0xc0, 0x48, 0xef, 0x43, 0xfe, 0x84, 0x48, 0x6c,
                0xcb, 0x87, 0xc2, 0x5f, 0x0a, 0xe0, 0x45, 0xf0,
                0xcc, 0xe1, 0xe7, 0x98, 0x9a, 0x9a, 0xa2, 0x20,
                0xa2, 0x8b, 0xdd, 0x48, 0x27, 0xe7, 0x51, 0xa2,
                0x4a, 0x6d, 0x5c, 0x62, 0xd7, 0x90, 0xa6, 0x63,
                0x93, 0xb9, 0x31, 0x11, 0xc1, 0xa5, 0x5d, 0xd7,
                0x42, 0x1a, 0x10, 0x18, 0x49, 0x74, 0xc7, 0xc5,
        };
        unsigned char out[sizeof(cipher)];
        int failed = 0;
        size_t k;

        CRYPTO_xchacha_20(out, plain, sizeof(out), key, iv);

        if (memcmp(out, cipher, sizeof(out)) != 0) {
                printf("XChaCha20 failed!\n");

                printf("Got:\t");
                for (k = 0; k < sizeof(out); k++)
                        printf("%2.2x", out[k]);
                printf("\n");

                printf("Want:\t");
                for (k = 0; k < sizeof(cipher); k++)
                        printf("%2.2x", cipher[k]);
                printf("\n");

                failed = 1;
        }

        return (failed);
}

int
main(int argc, char **argv)
{
        struct chacha_tv *tv;
        unsigned char *in, *out;
        size_t i, j, k;
        int failed = 0;

        for (i = 0; i < N_VECTORS; i++) {
                tv = &chacha_test_vectors[i];

                for (j = 0; j < N_FUNCS; j++) {
                        in = calloc(1, tv->len);
                        if (in == NULL)
                                errx(1, "calloc in");
                        out = calloc(1, tv->len);
                        if (out == NULL)
                                errx(1, "calloc out");

                        chacha_test_functions[j].func(tv, out, in);

                        if (memcmp(out, tv->out, tv->len) != 0) {
                                printf("ChaCha %s failed for \"%s\"!\n",
                                    chacha_test_functions[j].name, tv->desc);

                                printf("Got:\t");
                                for (k = 0; k < tv->len; k++)
                                        printf("%2.2x", out[k]);
                                printf("\n");

                                printf("Want:\t");
                                for (k = 0; k < tv->len; k++)
                                        printf("%2.2x", tv->out[k]);
                                printf("\n");

                                failed = 1;
                        }

                        free(in);
                        free(out);
                }
        }

        if (crypto_hchacha_20_test() != 0)
                failed = 1;

        if (crypto_xchacha_20_test() != 0)
                failed = 1;

        return failed;
}