selftest.h

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/***********************************************************************
 * 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);
    if (secp256k1_memcmp_var(out, output32, 32) != 0) {
        return 0;
    }
    if (fn_compression != secp256k1_sha256_transform && !secp256k1_sha256_smoke_test(fn_compression)) {
        return 0;
    }
    return 1;
}
 
static int secp256k1_selftest_passes(void) {
    /* Use default sha256 compression */
    return secp256k1_selftest_sha256(secp256k1_sha256_transform);
}
 
#endif /* SECP256K1_SELFTEST_H */