[Cryptlib] help

[Bharathi Nandhan]

Hello,

Am trying to write a program using crypt library, which can connect to
ssh server and execute commands remotely.

I was successful in creating ssh session and writing data to the
session. But, i couldnt able to read data from the session.

Below is the code which i used for creating, writing and reading
output back from ssh session.

Please let me know your thoughts and correct me.

cryptInit();

CRYPT_SESSION cryptSession;


int bytesCopied, status;

/* Create a client session */

status = cryptCreateSession( &cryptSession, CRYPT_UNUSED /* CRYPT_UNUSED */,

CRYPT_SESSION_SSH );

if( cryptStatusError( status ) )

{

qDebug() << "Couldnt able to create session";

}


/* Set servername and password to the session */

const char c_username[30] = "ssh://***@xx.xx.x.x";

const char c_password[10] = "xx";

status = cryptSetAttributeString( cryptSession, CRYPT_SESSINFO_SERVER_NAME,

c_username, strlen(c_username) );

if( cryptStatusError( status ) )

{

cryptDestroySession( cryptSession );

qDebug() << "Couldnt able to input servername to the session";

}

status = cryptSetAttributeString( cryptSession, CRYPT_SESSINFO_PASSWORD,

c_password, strlen(c_password) );

if( cryptStatusError( status ) )

{

cryptDestroySession( cryptSession );

qDebug() << "Couldnt able to input password to the session";

}

else

{

qDebug() << "Success";

}


/* Activate the session */

status = cryptSetAttribute( cryptSession, CRYPT_SESSINFO_ACTIVE, TRUE );

if( cryptStatusError( status ) )

{

cryptDestroySession( cryptSession );

if ( status = CRYPT_ERROR_WRONGKEY)

qDebug() << "Couldnt able to activate session" << status;

}

else

{

qDebug() << "Session activated";

}


/* Send a command to the remote system */

char command[30] = "ls -l\r\n";

status = cryptPushData( cryptSession, command, strlen( command ),
&bytesCopied );

if( cryptStatusOK( status ) )

{

if( bytesCopied != ( int ) strlen( command ) )

status = -1; /* Not all data was processed */

else

{

status = cryptFlushData( cryptSession );

qDebug() << "Flushed Data"<< status;

}

}



/* Read back the response */

int *outDataLength = 0, outDataMaxLength = 500;

char outData[499];


status = cryptPopData( cryptSession, outData, outDataMaxLength,
outDataLength );

if( cryptStatusError( status ) )

{

cryptDestroySession( cryptSession );

qDebug() << "Error Reading data" << status;

}


//cryptDestroySession( cryptSession );

qDebug() << "Return Value:"<<outData;

qDebug() << "Bytes Copied:"<<*outDataLength;


cryptDestroySession( cryptSession );

cryptEnd();


Regards,
Bharathinandhan R