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/* sym-encrypt.c - symmetric encrypt functions |
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* Copyright (C) 2002, 2003 Timo Schulz |
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* |
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* This file is part of MyGPGME. |
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* |
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* MyGPGME is free software; you can redistribute it and/or modify |
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* it 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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* |
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* MyGPGME is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <assert.h> |
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|
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#include "util.h" |
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#include "context.h" |
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#include "ops.h" |
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|
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|
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struct symenc_result_s { |
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int failed; |
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}; |
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|
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|
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static gpgme_error_t |
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create_result_struct( gpgme_ctx_t ctx ) |
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{ |
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assert( !ctx->result.symenc ); |
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ctx->result.symenc = calloc( 1, sizeof *ctx->result.symenc ); |
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if( !ctx->result.symenc ) |
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return mk_error( Out_Of_Core ); |
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ctx->result_type = RESULT_TYPE_SYMENC; |
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|
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return 0; |
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} /* create_result_struct */ |
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|
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|
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void |
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_gpgme_release_symenc_result( _symenc_result_t res ) |
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{ |
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safe_free( res ); |
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} /* _gpgme_relese_symenc_result */ |
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|
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|
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static void |
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symenc_status_handler( gpgme_ctx_t ctx, gpg_status_code_t code, char *args ) |
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{ |
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if ( ctx->out_of_core ) |
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return; |
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|
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if( ctx->result_type == RESULT_TYPE_NONE ) { |
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if( create_result_struct( ctx ) ) { |
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ctx->out_of_core = 1; |
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return; |
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} |
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} |
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|
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assert( ctx->result_type == RESULT_TYPE_SYMENC ); |
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|
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switch( code ) { |
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case STATUS_MISSING_PASSPHRASE: |
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ctx->result.symenc->failed = 1; |
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break; |
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|
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case STATUS_END_DECRYPTION: |
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ctx->result.symenc->failed = 0; |
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break; |
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|
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default: |
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break; |
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} |
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} /* symenc_status_handler */ |
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|
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|
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static gpgme_error_t |
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symenc_start( gpgme_ctx_t ctx, gpgme_data_t plain, gpgme_data_t ciph ) |
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{ |
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int rc = 0; |
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|
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fail_on_pending_request( ctx ); |
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ctx->pending = 1; |
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|
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/* create a process object */ |
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_gpgme_gpg_release( &ctx->gpg ); |
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rc = _gpgme_gpg_new( &ctx->gpg ); |
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if( rc ) |
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goto leave; |
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|
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if( ctx->use_logging ) |
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_gpgme_gpg_set_logging_handler( ctx->gpg, ctx ); |
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_gpgme_gpg_set_status_handler ( ctx->gpg, symenc_status_handler, ctx ); |
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if( ctx->passphrase_value ) { |
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rc = _gpgme_add_passphrase( ctx ); |
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if( rc ) |
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goto leave; |
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} |
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|
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/* build the commandline */ |
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_gpgme_gpg_add_arg ( ctx->gpg, "--symmetric" ); |
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_gpgme_encrypt_add_cipher (ctx); |
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if (ctx->no_compress) |
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_gpgme_gpg_add_arg (ctx->gpg, "-z 0"); |
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if (ctx->force_mdc) |
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_gpgme_gpg_add_arg (ctx->gpg, "--force-mdc"); |
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if( ctx->use_armor ) |
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_gpgme_gpg_add_arg( ctx->gpg, "--armor" ); |
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|
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/* Check the supplied data */ |
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if( gpgme_data_get_type( plain ) == GPGME_DATA_TYPE_NONE ) { |
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rc = mk_error( No_Data ); |
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goto leave; |
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} |
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_gpgme_data_set_mode( plain, GPGME_DATA_MODE_OUT ); |
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if ( !ciph || gpgme_data_get_type( ciph ) != GPGME_DATA_TYPE_NONE ) { |
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rc = mk_error (Invalid_Value); |
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goto leave; |
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} |
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_gpgme_data_set_mode( ciph, GPGME_DATA_MODE_IN ); |
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/* Tell the gpg object about the data */ |
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if( ctx->use_tmpfiles ) { |
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_gpgme_gpg_add_arg ( ctx->gpg, "--output" ); |
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_gpgme_gpg_add_arg ( ctx->gpg, _gpgme_get_tmpfile( 0 ) ); |
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_gpgme_data_write_to_tmpfile( plain ); |
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_gpgme_gpg_add_arg ( ctx->gpg, _gpgme_get_tmpfile( 1 ) ); |
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} |
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else { |
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_gpgme_gpg_add_arg ( ctx->gpg, "--output" ); |
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_gpgme_gpg_add_arg ( ctx->gpg, "-" ); |
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_gpgme_gpg_add_data ( ctx->gpg, ciph, 1 ); |
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_gpgme_gpg_add_arg ( ctx->gpg, "--" ); |
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_gpgme_gpg_add_data ( ctx->gpg, plain, 0 ); |
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} |
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|
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/* and kick off the process */ |
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rc = _gpgme_gpg_spawn ( ctx->gpg, ctx ); |
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|
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leave: |
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if( rc ) { |
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ctx->pending = 0; |
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_gpgme_gpg_release( &ctx->gpg ); |
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} |
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return rc; |
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} /* symenc_start */ |
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|
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|
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gpgme_error_t |
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gpgme_op_symenc( gpgme_ctx_t ctx, gpgme_data_t in, gpgme_data_t out ) |
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{ |
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gpgme_error_t err; |
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|
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err = symenc_start ( ctx, in, out ); |
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if( !err ) { |
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gpgme_wait( ctx, 1 ); |
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ctx->pending = 0; |
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if( ctx->use_tmpfiles ) { |
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_gpgme_data_read_from_tmpfile( out ); |
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_gpgme_del_tmpfiles( ctx->wipe_fnc ); |
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} |
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assert( ctx->result.symenc ); |
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if( ctx->result.symenc->failed ) |
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err = mk_error( No_Passphrase ); |
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else if( gpgme_get_process_rc( ctx ) ) |
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err = mk_error( Interal_GPG_Problem ); |
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} |
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return err; |
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} /* gpgme_op_symenc */ |
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|
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|
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gpgme_error_t |
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gpgme_op_clip_symenc( gpgme_ctx_t ctx ) |
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{ |
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gpgme_error_t err; |
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gpgme_data_t plain = NULL; |
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gpgme_data_t ciph = NULL; |
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|
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gpgme_control( ctx, GPGME_CTRL_ARMOR, 1 ); |
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err = gpgme_data_new_from_clipboard (&plain); |
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if( !err ) |
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err = gpgme_data_new( &ciph ); |
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if( !err ) |
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err = gpgme_op_symenc( ctx, plain, ciph ); |
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if( !err ) { |
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gpgme_data_change_version( &ciph ); |
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gpgme_data_release_and_set_clipboard( ciph ); |
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} |
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gpgme_data_release( plain ); |
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|
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return err; |
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} /* gpgme_op_clip_symenc */ |
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