136 lines
4.2 KiB
C++
136 lines
4.2 KiB
C++
/*
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Copyright (C) 2009 Rob Scheepmaker <r.scheepmaker@student.utwente.nl>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef IDENTITY_H
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#define IDENTITY_H
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#include <plasma.h>
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#include <QtCore/QObject>
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#include <QtCore/QDataStream>
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#include <QtCore/QMetaType>
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#include <QtCrypto>
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namespace Plasma {
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class CredentialsPrivate;
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/**
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* @class Credentials plasma/credentials.h <Plasma/Credentials>
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*
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* This class encapsules someone's identity.
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* It contains a unique id that identifies the machine an incoming connection is coming from, it's
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* name (which is not necesarily unique and/or trusted), a public key used to validate messages
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* coming from the machine with this identity, and in the future the possibility to determine
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* whether or not this identity can be trusted based on mechanisms different then pin pairing, e.g.
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* a signature of the key that can be verified by a gpg trusted key.
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*/
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class Credentials
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{
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public:
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/**
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* Default constructor.
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*/
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Credentials();
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/**
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* Copy constructor.
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*/
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Credentials(const Credentials &other);
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~Credentials();
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Credentials &operator=(const Credentials &other);
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/**
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* Create a new identity with a new set of random public/private keys.
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*/
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static Credentials createCredentials(const QString &name);
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/**
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* @return whether or not this identity can be trusted based on e.g. having the key signed with
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* a trusted GPG key (not yet implemented) or having the key in a designated folder on disk
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* (about to be impl.). If this function returns false, your shell should always instatiate
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* pin pairing before allowing a connection from an untrusted source
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* (AuthorizationRule::PinRequired flag should be set on the rule with setRules).
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*/
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TrustLevel trustLevel() const;
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/**
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* @return whether or not this is a null identity or an invalid one (hash of key doesn't match
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* id). Maybe isValid() is a better name?
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*/
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bool isValid() const;
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/**
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* @return the name of this identity. There's however no guarantee that if the name returns e.g.
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* "Santa Claus", this message is actually from Mr. Claus, except if isTrusted is true.
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*/
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QString name() const;
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/**
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* @return an id to identify this identity. I use a Hash of the public key as ID. This way we
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* don't have to send the complete public key with every message.
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*/
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QString id() const;
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/**
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* @return wheter or not @p signature is correct for @p message.
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*/
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bool isValidSignature(const QByteArray &signature, const QByteArray &message);
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/**
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* @return whether or not this identity can be used for signing a message (whether or not it
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* includes a public key)
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*/
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bool canSign() const;
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/**
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* @return the signature for the message.
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*/
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QByteArray signMessage(const QByteArray &message);
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/**
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* @return a Credentials stripped from any private key, so you can be sure it is save to send to
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* somebody.
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*/
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Credentials toPublicCredentials() const;
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friend QDataStream &operator<<(QDataStream &, const Credentials &);
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friend QDataStream &operator>>(QDataStream &, Credentials &);
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private:
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Credentials(const QString &id, const QString &name, const QString &key,
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bool privateKey = false);
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CredentialsPrivate *const d;
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friend class AuthorizationManagerPrivate;
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friend class CredentialsPrivate;
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};
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/**
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* Streaming operators for sending/storing identities.
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*/
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QDataStream &operator<<(QDataStream &, const Credentials &);
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QDataStream &operator>>(QDataStream &, Credentials &);
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}
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#endif // IDENTITY_H
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