VirgilSymmetricCipher.h

#ifndef VIRGIL_CRYPTO_SYMMETRIC_SIPHER_H
#define VIRGIL_CRYPTO_SYMMETRIC_SIPHER_H

#include <string>

#include <virgil/crypto/VirgilByteArray.h>
#include <virgil/crypto/foundation/asn1/VirgilAsn1Compatible.h>

namespace virgil { namespace crypto { namespace foundation {

class VirgilSymmetricCipherImpl;

class VirgilSymmetricCipher : public virgil::crypto::foundation::asn1::VirgilAsn1Compatible {
public:
    typedef enum {
        VirgilSymmetricCipherPadding_PKCS7,
        VirgilSymmetricCipherPadding_OneAndZeros,
        VirgilSymmetricCipherPadding_ZerosAndLen,
        VirgilSymmetricCipherPadding_Zeros
    } VirgilSymmetricCipherPadding;

public:

    static VirgilSymmetricCipher aes256();

    VirgilSymmetricCipher();

    virtual ~VirgilSymmetricCipher() throw();


    std::string name() const;

    size_t blockSize() const;

    size_t ivSize() const;

    size_t keySize() const;

    size_t keyLength() const;

    size_t authTagLength() const;

    bool isEncryptionMode() const;

    bool isDecryptionMode() const;

    bool isAuthMode() const;

    bool isSupportPadding() const;


    void setEncryptionKey(const virgil::crypto::VirgilByteArray& key);

    void setDecryptionKey(const virgil::crypto::VirgilByteArray& key);

    void setPadding(VirgilSymmetricCipherPadding padding);

    void setIV(const virgil::crypto::VirgilByteArray& iv);

    void setAuthData(const virgil::crypto::VirgilByteArray& authData);

    void reset();

    void clear();


    virgil::crypto::VirgilByteArray crypt(
            const virgil::crypto::VirgilByteArray& input,
            const virgil::crypto::VirgilByteArray& iv);


    virgil::crypto::VirgilByteArray update(const virgil::crypto::VirgilByteArray& input);

    virgil::crypto::VirgilByteArray finish();

    VirgilSymmetricCipher(const VirgilSymmetricCipher& other);

    VirgilSymmetricCipher& operator=(const VirgilSymmetricCipher& rhs);

    virtual size_t asn1Write(
            virgil::crypto::foundation::asn1::VirgilAsn1Writer& asn1Writer,
            size_t childWrittenBytes = 0) const;

    virtual void asn1Read(virgil::crypto::foundation::asn1::VirgilAsn1Reader& asn1Reader);
private:
    explicit VirgilSymmetricCipher(int type);

    void checkState() const;

private:
    VirgilSymmetricCipherImpl* impl_;
};

}}}

#endif /* VIRGIL_CRYPTO_SYMMETRIC_SIPHER_H */