>> Yes, that was the problem. I installed haveged and it worked. But it seems
>> that the key generation in my C++ application will not work, if a custom
>> passphrase
>> callback is set. The key generation code is unchanged, but with the callback
>> I get an
>> GPG_ERR_GENERAL error. The init and callback code is as follows:
>I cleaned your code up a bit and it works fine.
I can't get that work. I copy pasted you code in my project and executed your
main,
but I still get a 'general error'. In the meanwhile I upgraded my system from
jesse to
debian 'testing'. I'm now using GnuPG 2.0.28 and GPGME 1.6 but the problem
stays the
same. I build the application with QT Creator 3.6 without any specific flags
for GnuPG.
Is there anything left I could check or try to figure out where the problem is?
Moreover I experience a very strange behaviour if i use my callback and a
existing key for encryption.
I want to encrypt a string only for a specific lists of recipients, but I get a
password request for a uid that wasn't even included in the recipients list. It
is always the same key
with the uid 'dummy dummy...' (it was the first key ever created). The request
is a window opened
by GnuPG Agent, which seems to ingore my custom password callback. The window
will sometimes
just reopen periodically. I thought GnuPG might include this dummy key by
default so I tried to use
the GPGME_ENCRYPT_NO_ENCRYPT_TO flag... but the result stays the same. I feel
like I should
resign. The code for encryption is:
encrypt(const std::string &plaintext, std::set<std::string> uids,
std::string &ciphertext) const{
bool result = false;
//create a null terminated recipients array including current user
int recipientsCount = uids.size() + 1;
gpgme_key_t* recipients = new gpgme_key_t[recipientsCount];
int i = 0;
for(auto const &curUid: uids){
//this will return the first gpgme key with exactly the given uid
if(getGPGMEKey(curUid.c_str(), recipients[i], false)){
i++;
}
}
recipients[i] = NULL; // null terminate the array
gpgme_data_t plain;
gpgme_data_t cipher;
if(!convertStringToData(plaintext, plain) || gpgme_data_new(&cipher)){
//todo error code: data allocation error
}
else{
//at this point GnuPG Agents asks for 'dummy dummy' password
if(gpgme_op_encrypt_sign(mContext, recipients,
(gpgme_encrypt_flags_t)(GPGME_ENCRYPT_NO_ENCRYPT_TO), plain, cipher)
|| gpgme_op_encrypt_result(mContext)->invalid_recipients) {
//todo error code: encryption error
}else{
//now fetch the encrypted data
if(convertDataToString(cipher, ciphertext)){
result = true;
}
}
}
//release references and buffer
//...
return result;
}
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