SecureRandom.cpp

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/******************************************************************************
 * Copyright (c) 2025 Calypso Networks Association https://calypsonet.org/    *
 *                                                                            *
 * See the NOTICE file(s) distributed with this work for additional           *
 * information regarding copyright ownership.                                 *
 *                                                                            *
 * This program and the accompanying materials are made available under the   *
 * terms of the Eclipse Public License 2.0 which is available at              *
 * http://www.eclipse.org/legal/epl-2.0                                       *
 *                                                                            *
 * SPDX-License-Identifier: EPL-2.0                                           *
 ******************************************************************************/
 
#include "keyple/card/calypso/cpp/SecureRandom.hpp"
 
namespace keyple {
namespace card {
namespace calypso {
namespace cpp {
 
SecureRandom::SecureRandom()
: mSeeded(false)
{
}
 
void
SecureRandom::setSeed()
{
    std::random_device rd;
 
    mGen = std::mt19937(rd());
    mDist = std::uniform_int_distribution<int>(0, 255);
 
    mSeeded = true;
}
 
void
SecureRandom::nextBytes(std::vector<std::uint8_t>& bytes)
{
    if (!mSeeded) {
        setSeed();
    }
 
    for (int i = 0; i < static_cast<int>(bytes.size()); i++) {
        bytes[i] = static_cast<std::uint8_t>(mDist(mGen));
    }
}
 
} /* namespace cpp */
} /* namespace calypso */
} /* namespace card */
} /* namespace keyple */