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Diffstat (limited to 'libtdenetwork/gpgmepp/callbacks.cpp')
-rw-r--r-- | libtdenetwork/gpgmepp/callbacks.cpp | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/libtdenetwork/gpgmepp/callbacks.cpp b/libtdenetwork/gpgmepp/callbacks.cpp new file mode 100644 index 000000000..b352515d0 --- /dev/null +++ b/libtdenetwork/gpgmepp/callbacks.cpp @@ -0,0 +1,138 @@ +/* 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 ); + write( fd, "\n", 1 ); + 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 +}; + |