Function computeDigest

core/base/Utils.cpp:422–452

}

std::string computeDigest(std::string_view data, std::string_view algorithm, DigestPresent present)
{
    unsigned char mdValue[EVP_MAX_MD_SIZE] = {0};
    unsigned int mdLen                     = 0;

    OpenSSL_add_all_digests();
    const EVP_MD* md = EVP_get_digestbyname(algorithm.data());
    if (!md)
        return std::string{};

    EVP_MD_CTX* mdctx = EVP_MD_CTX_create();
    auto ok           = EVP_DigestInit(mdctx, md);
    if (!ok)
    {
        EVP_MD_CTX_destroy(mdctx);
        return std::string{};
    }
    EVP_DigestUpdate(mdctx, data.data(), data.size());
    EVP_DigestFinal(mdctx, mdValue, &mdLen);
    EVP_MD_CTX_destroy(mdctx);

    switch (present)
    {
    case DigestPresent::Base64:
        return base64Encode(std::span<uint8_t>{mdValue, mdLen});
    case DigestPresent::Hex:
        return bin2hex(std::string_view{(const char*)mdValue, (size_t)mdLen});
    default:
        return std::string{(const char*)mdValue, (size_t)mdLen};
    }
}

std::string computeFileDigest(std::string_view filename,
                              std::string_view algorithm,