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/* callbacks.cpp - callback targets for internal use:
Copyright (C) 2003,2004 Klarälvdalens Datakonsult AB
This file is part of GPGME++.
GPGME++ is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
GPGME++ is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GPGME; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "callbacks.h"
#include <gpgmepp/interfaces/progressprovider.h>
#include <gpgmepp/interfaces/passphraseprovider.h>
#include <gpgmepp/interfaces/dataprovider.h>
#include <gpgmepp/context.h> // for Error
#include <cassert>
#include <cerrno>
#include <unistd.h>
#include <cstdlib>
#include <string.h>
#include <cstdlib>
static inline gpg_error_t makeErrorFromErrno() {
return gpg_err_make_from_errno( (gpg_err_source_t)22, errno );
}
static inline gpg_error_t makeError( gpg_err_code_t code ) {
return gpg_err_make( (gpg_err_source_t)22, code );
}
using GpgME::ProgressProvider;
using GpgME::PassphraseProvider;
using GpgME::DataProvider;
void progress_callback( void * opaque, const char * what,
int type, int current, int total ) {
ProgressProvider * provider = static_cast<ProgressProvider*>( opaque );
if ( provider )
provider->showProgress( what, type, current, total );
}
static void wipe( char * buf, size_t len ) {
for ( size_t i = 0 ; i < len ; ++i )
buf[i] = '\0';
}
gpgme_error_t passphrase_callback( void * opaque, const char * uid_hint, const char * desc,
int prev_was_bad, int fd ) {
PassphraseProvider * provider = static_cast<PassphraseProvider*>( opaque );
bool canceled = false;
gpgme_error_t err = GPG_ERR_NO_ERROR;
char * passphrase = provider ? provider->getPassphrase( uid_hint, desc, prev_was_bad, canceled ) : 0 ;
if ( canceled ) {
err = makeError( GPG_ERR_CANCELED );
}
else {
if ( passphrase && *passphrase ) {
size_t passphrase_length = strlen( passphrase );
size_t written = 0;
do {
ssize_t now_written = write( fd, passphrase + written, passphrase_length - written );
if ( now_written < 0 ) {
err = makeErrorFromErrno();
break;
}
written += now_written;
} while ( written < passphrase_length );
}
}
if ( passphrase && *passphrase )
wipe( passphrase, strlen( passphrase ) );
free( passphrase );
if (write( fd, "\n", 1 ) < 0) {
// An error occurred during write
// FIXME
printf("Something went wrong in libtdenetwork/gpgmepp/callbacks.cpp\n");
}
return err;
}
static ssize_t
data_read_callback( void * opaque, void * buf, size_t buflen ) {
DataProvider * provider = static_cast<DataProvider*>( opaque );
if ( !provider ) {
errno = EINVAL;
return -1;
}
return provider->read( buf, buflen );
}
static ssize_t
data_write_callback( void * opaque, const void * buf, size_t buflen ) {
DataProvider * provider = static_cast<DataProvider*>( opaque );
if ( !provider ) {
errno = EINVAL;
return -1;
}
return provider->write( buf, buflen );
}
static off_t
data_seek_callback( void * opaque, off_t offset, int whence ) {
DataProvider * provider = static_cast<DataProvider*>( opaque );
if ( !provider ) {
errno = EINVAL;
return -1;
}
if ( whence != SEEK_SET && whence != SEEK_CUR && whence != SEEK_END ) {
errno = EINVAL;
return -1;
}
return provider->seek( offset, whence );
}
static void data_release_callback( void * opaque ) {
DataProvider * provider = static_cast<DataProvider*>( opaque );
if ( provider )
provider->release();
}
gpgme_data_cbs data_provider_callbacks = {
&data_read_callback,
&data_write_callback,
&data_seek_callback,
&data_release_callback
};
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