/***********************************************************************

 * Copyright (c) 2020 Pieter Wuille                                    *

 * Distributed under the MIT software license, see the accompanying    *

 * file COPYING or https://www.opensource.org/licenses/mit-license.php.*

 ***********************************************************************/

#ifndef SECP256K1_SELFTEST_H

#define SECP256K1_SELFTEST_H

#include "hash.h"

#include <string.h>

static int secp256k1_selftest_sha256(secp256k1_sha256_compression_function fn_compression) {

    secp256k1_hash_ctx hash_ctx;

    static const char *input63 = "For this sample, this 63-byte string will be used as input data";

    static const unsigned char output32[32] = {

        0xf0, 0x8a, 0x78, 0xcb, 0xba, 0xee, 0x08, 0x2b, 0x05, 0x2a, 0xe0, 0x70, 0x8f, 0x32, 0xfa, 0x1e,

        0x50, 0xc5, 0xc4, 0x21, 0xaa, 0x77, 0x2b, 0xa5, 0xdb, 0xb4, 0x06, 0xa2, 0xea, 0x6b, 0xe3, 0x42,

    };

    unsigned char out[32];

    secp256k1_sha256 hasher;

    secp256k1_sha256_initialize(&hasher);

    hash_ctx.fn_sha256_compression = fn_compression;

    secp256k1_sha256_write(&hash_ctx, &hasher, (const unsigned char*)input63, 63);

    secp256k1_sha256_finalize(&hash_ctx, &hasher, out);

    return secp256k1_memcmp_var(out, output32, 32) == 0;

}

static int secp256k1_selftest_passes(void) {

    /* Use default sha256 compression */

    return secp256k1_selftest_sha256(secp256k1_sha256_transform);

}

#endif /* SECP256K1_SELFTEST_H */