#ifndef QTOE_H
#define QTOE_H

#include <QObject>
#include <QtDebug>
#include <openssl/aes.h>
#include <openssl/evp.h>
#include <openssl/rsa.h>
#include <openssl/pem.h>
#include <openssl/ssl.h>
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/asn1.h>
#include <openssl/bio.h>
#include <openssl/conf.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/x509.h>
#include <assert.h>

class QtOE : public QObject
{
    Q_OBJECT
public:
    explicit QtOE(QObject *parent = nullptr);

    RSA* createPrivateRSA(QString key, QString passphrase = "");
    RSA* createPublicRSA(QString key);
    RSA* createPublicRSA(X509* cert);
    X509* createX509(QString cert);

    QString signMessage(RSA* privateKey, QString plainText);
    bool verifySignature(RSA* publicKey, QString plainText, QString signatureBase64);

    void printCertBio(X509* cert);
private:
    bool RSASign( RSA* rsa,
                  const unsigned char* Msg,
                  size_t MsgLen,
                  unsigned char** EncMsg,
                  size_t* MsgLenEnc);
    bool RSAVerifySignature( RSA* rsa,
                             unsigned char* MsgHash,
                             size_t MsgHashLen,
                             const char* Msg,
                             size_t MsgLen,
                             bool* Authentic);
    void Base64Encode( const unsigned char* buffer,
                       size_t length,
                       char** base64Text);
    size_t calcDecodeLength(const char* b64input);
    void Base64Decode(const char* b64message, unsigned char** buffer, size_t* length);
    static int pem_password_callback(char *buf, int max_len, int flag, void *ctx);

signals:

};

#endif // QTOE_H