Security of user information has become an essential part at many instances in the application development life cycle. Following code snippets perform some means of security features with Phonebook of user's phone.
Hearders Required:
#include <cntdb.h> // CContactDatabse,
#include <cntitem.h> //CContactItem,CContactItemFieldSet
Library required:
LIBRARY cntmodel.lib //CContactDatabse, CContactItem, CContactItemFieldSet
Capability Required:
Capability WriteDeviceData
void CEncryptContactContainer::EncryptAll()
{
CContactDatabase *contactDB = CContactDatabase::OpenL();
CleanupStack::PushL(contactDB);
TContactIter iter(*contactDB);
TContactItemId aContactId;
//Developer can take Heap based descriptor for large/unknown size of contact items.
TBuf16<70> aValue;
const CContactIdArray* contactArray = contactDB->SortedItemsL();
TInt cnt=contactArray->Count();
for(TInt i=0;i<cnt;i++)
{
CContactItem* contactItem=NULL;
contactItem= contactDB->OpenContactL((*contactArray)[i]);
CleanupStack::PushL(contactItem);
CContactItemFieldSet& fieldSet= contactItem->CardFields();
TInt fieldCount=fieldSet.Count(); // This will give number of contact fields.
for(TInt index=0; index < fieldCount; index++)
{
CContactItemField& field = fieldSet[index];
const CContentType& type = field.ContentType();
if(!(type.ContainsFieldType(KUidContactFieldBirthday)))
{
TPtrC name = contactItem->CardFields()[index].TextStorage()->Text();
aValue.Copy(name);
Encrypt(aValue); // Call real encyption here
contactItem->CardFields()[index].TextStorage()->SetTextL(aValue);
}
} //Inner for loop ends here
contactDB->CommitContactL(*contactItem);
CleanupStack::PopAndDestroy(contactItem);
} //Outer for loop ends here
CleanupStack::PopAndDestroy(contactDB);
}
void CEncryptContactContainer:: Encrypt (TDes& aValue)
{
for(TInt iCount=0; iCount< aValue.Length();iCount++)
{
aValue[iCount]+=3;
}
}
void CEncryptContactContainer::DecryptAll()
{
CContactDatabase *contactDB = CContactDatabase::OpenL();
CleanupStack::PushL(contactDB);
TContactIter iter(*contactDB);
TContactItemId aContactId;
TBuf16<70> aValue;
const CContactIdArray* contactArray = contactDB->SortedItemsL();
TInt cnt=contactArray->Count();
for(TInt i=0;i<cnt;i++)
{
CContactItem* contactItem=NULL;
contactItem= contactDB->OpenContactL((*contactArray)[i]);
CleanupStack::PushL(contactItem);
CContactItemFieldSet& fieldSet= contactItem->CardFields();
TInt fieldCount=fieldSet.Count(); // This will give number of contact fields.
for(TInt index=0; index < fieldCount; index++)
{
CContactItemField& field = fieldSet[index];
const CContentType& type = field.ContentType();
if(!(type.ContainsFieldType(KUidContactFieldBirthday)))
{
TPtrC name = contactItem->CardFields()[index].TextStorage()->Text();
aValue.Copy(name);
Decrypt(aValue);
contactItem->CardFields()[index].TextStorage()->SetTextL(aValue);
}
} //Inner for loop ends here
contactDB->CommitContactL(*contactItem);
CleanupStack::PopAndDestroy(contactItem);
} //Outer for loop ends here
CleanupStack::PopAndDestroy(contactDB);
}
void CEncryptContactContainer:: Decrypt (TDes& aValue)
{
for(TInt iCount=0; iCount< aValue.Length();iCount++)
{
aValue[iCount]-=3;
}
}
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