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