qt-creator/src/libs/ssh/sshcapabilities.cpp

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#include "sshcapabilities_p.h"

#include "sshexception_p.h"

#include <QCoreApplication>
#include <QString>

namespace QSsh {
namespace Internal {

namespace {
    QByteArray listAsByteArray(const QList<QByteArray> &list)
    {
        QByteArray array;
        foreach (const QByteArray &elem, list)
            array += elem + ',';
        if (!array.isEmpty())
            array.remove(array.count() - 1, 1);
        return array;
    }
} // anonymous namspace

const QByteArray SshCapabilities::DiffieHellmanGroup1Sha1("diffie-hellman-group1-sha1");
const QByteArray SshCapabilities::DiffieHellmanGroup14Sha1("diffie-hellman-group14-sha1");
const QByteArray SshCapabilities::EcdhKexNamePrefix("ecdh-sha2-nistp");
const QByteArray SshCapabilities::EcdhNistp256 = EcdhKexNamePrefix + "256";
const QByteArray SshCapabilities::EcdhNistp384 = EcdhKexNamePrefix + "384";
const QByteArray SshCapabilities::EcdhNistp521 = EcdhKexNamePrefix + "521";
const QList<QByteArray> SshCapabilities::KeyExchangeMethods = QList<QByteArray>()
        << SshCapabilities::EcdhNistp256
        << SshCapabilities::EcdhNistp384
        << SshCapabilities::EcdhNistp521
        << SshCapabilities::DiffieHellmanGroup1Sha1
        << SshCapabilities::DiffieHellmanGroup14Sha1;

const QByteArray SshCapabilities::PubKeyDss("ssh-dss");
const QByteArray SshCapabilities::PubKeyRsa("ssh-rsa");
const QByteArray SshCapabilities::PubKeyEcdsa("ecdsa-sha2-nistp256");
const QList<QByteArray> SshCapabilities::PublicKeyAlgorithms = QList<QByteArray>()
        << SshCapabilities::PubKeyEcdsa
        << SshCapabilities::PubKeyRsa
        << SshCapabilities::PubKeyDss;

const QByteArray SshCapabilities::CryptAlgo3DesCbc("3des-cbc");
const QByteArray SshCapabilities::CryptAlgo3DesCtr("3des-ctr");
const QByteArray SshCapabilities::CryptAlgoAes128Cbc("aes128-cbc");
const QByteArray SshCapabilities::CryptAlgoAes128Ctr("aes128-ctr");
const QByteArray SshCapabilities::CryptAlgoAes192Ctr("aes192-ctr");
const QByteArray SshCapabilities::CryptAlgoAes256Ctr("aes256-ctr");
const QList<QByteArray> SshCapabilities::EncryptionAlgorithms
    = QList<QByteArray>() << SshCapabilities::CryptAlgoAes256Ctr
                          << SshCapabilities::CryptAlgoAes192Ctr
                          << SshCapabilities::CryptAlgoAes128Ctr
                          << SshCapabilities::CryptAlgo3DesCtr
                          << SshCapabilities::CryptAlgoAes128Cbc
                          << SshCapabilities::CryptAlgo3DesCbc;

const QByteArray SshCapabilities::HMacSha1("hmac-sha1");
const QByteArray SshCapabilities::HMacSha196("hmac-sha1-96");
const QByteArray SshCapabilities::HMacSha256("hmac-sha2-256");
const QByteArray SshCapabilities::HMacSha384("hmac-sha2-384");
const QByteArray SshCapabilities::HMacSha512("hmac-sha2-512");
const QList<QByteArray> SshCapabilities::MacAlgorithms
    = QList<QByteArray>() /* << SshCapabilities::HMacSha196 */
        << SshCapabilities::HMacSha256
        << SshCapabilities::HMacSha384
        << SshCapabilities::HMacSha512
        << SshCapabilities::HMacSha1;

const QList<QByteArray> SshCapabilities::CompressionAlgorithms
    = QList<QByteArray>() << "none";

const QByteArray SshCapabilities::SshConnectionService("ssh-connection");

QList<QByteArray> SshCapabilities::commonCapabilities(const QList<QByteArray> &myCapabilities,
                                               const QList<QByteArray> &serverCapabilities)
{
    QList<QByteArray> capabilities;
    foreach (const QByteArray &myCapability, myCapabilities) {
        if (serverCapabilities.contains(myCapability))
            capabilities << myCapability;
    }

    if (!capabilities.isEmpty())
        return capabilities;

    throw SshServerException(SSH_DISCONNECT_KEY_EXCHANGE_FAILED,
        "Server and client capabilities do not match.",
        QCoreApplication::translate("SshConnection",
            "Server and client capabilities don't match. "
            "Client list was: %1.\nServer list was %2.")
            .arg(QString::fromLocal8Bit(listAsByteArray(myCapabilities).data()))
            .arg(QString::fromLocal8Bit(listAsByteArray(serverCapabilities).data())));

}

QByteArray SshCapabilities::findBestMatch(const QList<QByteArray> &myCapabilities,
    const QList<QByteArray> &serverCapabilities)
{
    return commonCapabilities(myCapabilities, serverCapabilities).first();
}

} // namespace Internal
} // namespace QSsh