Hi All,

I am a total newbie. I am going crazy with a problem. I am using QCA and qca-gnupg.
I am trying to simply import a secret key. The code is:
Header File:
Qt Code: 
  1. #ifndef MYGPG_H
  2. #define MYGPG_H
  3.  
  4. #include <QDebug>
  5. #include <QObject>
  6. #include <QtCrypto>
  7.  
  8. class PassphraseHandler: public QObject
  9. {
  10.         Q_OBJECT
  11. public:
  12.         QCA::EventHandler handler;
  13.  PassphraseHandler(QObject *parent = 0);
  14.  
  15. private slots:
  16.     void eh_eventReady(int id, const QCA::Event &event);
  17.  
  18.     };
  19. class myKeyLoader : public QObject
  20. {
  21.     Q_OBJECT
  22.  
  23. public:
  24.     myKeyLoader(QObject* parent = NULL);
  25. public slots:
  26.     void start();
  27. };
  28.  
  29. #endif // MYGPG_H
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Source file:
Qt Code: 
  1. #include "mygpg.h"
  2.  
  3.  
  4. PassphraseHandler::PassphraseHandler(QObject *parent) : QObject(parent)
  5. {
  6.     connect(&handler, SIGNAL(eventReady(int, const QCA::Event &)),
  7.             SLOT(eh_eventReady(int, const QCA::Event &)));
  8.     handler.start();
  9. }
  10.  
  11.  
  12. void PassphraseHandler::eh_eventReady(int id, const QCA::Event &event)
  13. {
  14.     if(event.type() == QCA::Event::Password)
  15.     {
  16.         QCA::SecureArray pass;
  17.         QCA::ConsolePrompt prompt;
  18.         prompt.getHidden("Passphrase");
  19.         prompt.waitForFinished();
  20.         pass = prompt.result();
  21.         handler.submitPassword(id, pass);
  22.     }
  23.     else
  24.         handler.reject(id);
  25. }
  26. myKeyLoader::myKeyLoader(QObject* parent)
  27.     :QObject(parent)
  28. {
  29.  
  30. }
  31.  
  32. void myKeyLoader::start()
  33. {
  34.     QCA::ConvertResult* result = new QCA::ConvertResult;
  35.     QCA::PGPKey myPgpKey = QCA::PGPKey::fromFile("private_key.pkr",result,"qca-gnupg");
  36.     qDebug()<<"pgp:"<<*result;
  37.     qDebug()<<"can decrypt:"<<myPgpKey.inKeyring();
  38. }
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main.cpp:
Qt Code: 
  1. #include <QtCore/QCoreApplication>
  2. #include <QDebug>
  3. #include <QFile>
  4. #include <QTimer>
  5.  
  6. #include "mygpg.h"
  7.  
  8. int main(int argc, char *argv[])
  9. {
  10.     QCoreApplication a(argc, argv);
  11.  
  12.     QCA::Initializer init;
  13.     if(!QCA::isSupported("openpgp"))
  14.     {
  15.     }
  16.     else
  17.     {
  18.          PassphraseHandler passphraseHandler;
  19.          myKeyLoader* keyLoader = new myKeyLoader();
  20.          QTimer::singleShot(0,keyLoader,SLOT(start()));
  21.     }
  22.  
  23.     return a.exec();
  24. }
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I get the following dignostic string:

"GPGProc: Running: [C:\Program Files\GNU\GnuPG\gpg.exe --no-tty --no-default-keyring --keyring C:\prj\qcaGnupg\qca_gnupg_tmp.JS4036.gpg --secret-keyring C:\prj\qcaGnupg\qca_gnupg_tmp.Oh4036.gpg --import]
GPGProc: Process started
GPGProc: Process finished: 2
GPGProc: Done
GPG Process Finished: exitStatus=2
stdout: []
stderr: [gpg: can't open `C:\prj\qcaGnupg\qca_gnupg_tmp.Oh4036.gpg'
gpg: key 169C844F: secret key not found: file open error
gpg: error reading `[stdin]': file open error
gp..."

But if I run the same command at the dos prompt it runs sucessfully, following is the output:

C:\prj\qcaGnupg>gpg.exe --no-tty --no-default-keyring --keyring C:\prj\qcaGnupg\qca_gnupg_tmp.JS4036.gpg --secret-keyring C:\prj\qcaGnupg\qca_gnupg_tmp.Oh4036.gpg --import
-----BEGIN PGP PRIVATE KEY BLOCK-----
Version: BCPG v1.45

lQIGBE0hbIABBAChhmP3pkI+XWlow0q9a3ZmwWLpPjQRs9oaNO CzMwAA5p54gNT7
5UCBv9K5uqreilyV4HZLSimKGW6JkvFBNCcxVc+rK2cqsvRZAw 0D2uJK1Lone/IW
AcfpVCqJyB7UtpPUGNqZdP90tNNIr1BBsOo25Ixsi3ujBHTLbb j0yP39JwARAQAB
/gcDApZudzSyZJYEYM9e7uuo5tq3YaX9G0kwnaMQitPBAVJU5UM tsR5/rJgiHKdL
4iOXaqkbm5Ek3rdwtX5KojFhPDT1edl7d6sFSXE5m8E2sbbBht BwC+AfmEyw+lkU
3G4Zss0Q5huL+tW9r3pZ9aIVORgA3AQlW+mKtX+GB8CQ56kVq/drWYbT5ec5ZUhv
X65CPi697hgdeD331kL9lnfxXgdAj8z4TPdGM76XNq0dwEBXSO TV5LHJUOztYX+s
30NpUq3xQVAJpdiYtH7BHKs2roTSiGLoy7NLRyhGZ1XZ5anZFs sOstNX8tqzntIy
WaxpDs85wX72UlO6m3BOgXDfi2xH0CsPjiBSyLO8cOVGB8Mty6 hl7juBO9yhtWOd
V69p3khwq3/kMPaOOb4Kjdr+BzmDX2xEu/JZx0uTCyFEQGTGLzqDoSz/Tt5Wy31O
z1B/bf8a7aoS/LhlaD+xq76IpuHBA+uVLxrODoyZdiECLhHNJZ7V41m0JDYxOWQ x
MTgwLWU2MTEtMTFkZi04ODBhLTEyMzEzOTBhOWNjMYixBBABAg AbBQJNIWyABYkA
AAAAAhsDAgsHAhUCAhYCAhkBAAoJEGnxunAWnIRP4rsD/1RhPfK/dce+KiH8FJFp
NgH8cwL7fMVei4tBXdSR19g/ZMdOivnb1ZGFzkEmhiCxzPyO5JFsNx4cBvOpwfZK
sKz7Dvcww+kYxPYYfvTzRvQAGgxOKOIJ/JkZcsYYMFr1j8bhaBs8qoFXz1zPpbGn
0o+kUXC6BmHUWeSVPgcdYJttnQIGBE0hbIABBACVjqtfKMExfI Jb++ARA8KMspkF
ejVFC82PKwPV/qdJGz7ydkmmGzN2MBv9Lt2G/OUUIBx7FfY7SDMZ1hxuoVsSZplA
vC35adKXqN/xONYkmts9TFk36/ELtS4y6jeOYtVe4cJ8qLXAy3Wf/qHcTUXbfX9P
a1ZNUVMExHIFnIprOwARAQAB/gcDAlaHs7BSahNiYI921+4EMeBszeR/XkfTECz6
OIw/grd00bQ3VOVrYRaSjmjGyEql5LiAaDQybMcQ9YND9A28EX/Og1C0E6AmRWIu
oe6zr1tEeZ3tVOXgaT5VAhIn3Y8og5NGd638SMvLVItNDwqRxL IalRrv6zSc/iab
4igPWO5Uiz32muJGMSYy1d7eLaA4Vae29Yk4WZ95fH0Kmy+slS y+aerLOODuS+57
GMRPMUAfOVGYvSBL5xgWap+/Pdkv2wnA9BokkhkS/XVI/h52HqX4M15zxD5s1RuG
CHcX9FeHMxxc/ikHB2QNrxa9Bp5baF5DrvwcXSGSNdnaIZRlOccm19QtjIaMwhp z
LmDWElrgiDFhctwcAAx86G51lirG+qdZJUMC4rce/1lsm8nLDQ7tgwWhG9mVZAdp
YMJGlUH0FJti7m9Ie70993w2+6ZlMGYacVR4UnANFItLhofqvU o5gDCeE+cbxGw7
iMATu8jdef+XaV6InwQYAQIACQUCTSFsggIbDAAKCRBp8bpwFp yET0PLA/48AVUY
oKm9p/SO7taSQSG+rsJF+yaMFRlitbY90YnmwT4tTb6d8IgaBhepk1Sb nz6fquDu
rXfF6pxkfZ/2gHITCHfSBm3Blzf9AVBdw80cl3qvvkid3UOY1Bvyx68W5g7Q2 X9n
3vG36efFEd/gVIDs70x6yrTpUTWI7kRgTYEpZA==
=xcAg
-----END PGP PRIVATE KEY BLOCK-----
^Z
gpg: key 169C844F: secret key imported
gpg: key 169C844F: public key "619d1180-e611-11df-880a-1231390a9cc1" imported
gpg: Total number processed: 1
gpg: imported: 1 (RSA: 1)
gpg: secret keys read: 1
gpg: secret keys imported: 1


____________

Any kind soul, please let me know what is wrong with my code and how to solve this problem. Thank you very much.