262 lines
6.3 KiB
C
262 lines
6.3 KiB
C
/* encrypt.c - encrypt functions
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* Copyright (C) 2000 Werner Koch (dd9jn)
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* Copyright (C) 2001, 2002 g10 Code GmbH
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*
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* This file is part of GPGME.
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*
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* GPGME 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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* GPGME 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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#include <config.h>
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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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#include "util.h"
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#include "context.h"
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#include "ops.h"
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#include "wait.h"
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#define SKIP_TOKEN_OR_RETURN(a) do { \
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while (*(a) && *(a) != ' ') (a)++; \
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while (*(a) == ' ') (a)++; \
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if (!*(a)) \
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return; /* oops */ \
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} while (0)
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struct encrypt_result_s
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{
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int no_valid_recipients;
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int invalid_recipients;
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GpgmeData xmlinfo;
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};
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void
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_gpgme_release_encrypt_result (EncryptResult result)
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{
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if (!result)
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return;
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gpgme_data_release (result->xmlinfo);
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xfree (result);
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}
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/*
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* Parse the args and save the information
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* in an XML structure.
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* With args of NULL the xml structure is closed.
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*/
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static void
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append_xml_encinfo (GpgmeData *rdh, char *args)
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{
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GpgmeData dh;
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char helpbuf[100];
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if (!*rdh)
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{
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if (gpgme_data_new (rdh))
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return; /* FIXME: We are ignoring out-of-core. */
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dh = *rdh;
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_gpgme_data_append_string (dh, "<GnupgOperationInfo>\n");
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}
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else
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{
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dh = *rdh;
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_gpgme_data_append_string (dh, " </encryption>\n");
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}
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if (!args)
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{
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/* Just close the XML containter. */
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_gpgme_data_append_string (dh, "</GnupgOperationInfo>\n");
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return;
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}
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_gpgme_data_append_string (dh, " <encryption>\n"
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" <error>\n"
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" <invalidRecipient/>\n");
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sprintf (helpbuf, " <reason>%d</reason>\n", atoi (args));
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_gpgme_data_append_string (dh, helpbuf);
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SKIP_TOKEN_OR_RETURN (args);
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_gpgme_data_append_string (dh, " <name>");
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_gpgme_data_append_percentstring_for_xml (dh, args);
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_gpgme_data_append_string (dh, "</name>\n"
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" </error>\n");
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}
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static void
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status_handler_finish (GpgmeCtx ctx)
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{
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if (ctx->result.encrypt->xmlinfo)
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{
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append_xml_encinfo (&ctx->result.encrypt->xmlinfo, NULL);
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_gpgme_set_op_info (ctx, ctx->result.encrypt->xmlinfo);
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ctx->result.encrypt->xmlinfo = NULL;
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}
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if (ctx->error)
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; /* already set by kludge in engine-gpgsm */
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else if (ctx->result.encrypt->no_valid_recipients)
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ctx->error = mk_error (No_Recipients);
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else if (ctx->result.encrypt->invalid_recipients)
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ctx->error = mk_error (Invalid_Recipients);
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}
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void
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_gpgme_encrypt_status_handler (GpgmeCtx ctx, GpgmeStatusCode code, char *args)
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{
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if (ctx->error)
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{
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if (ctx->result.encrypt) /* check that we have allocated it. */
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status_handler_finish (ctx);
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return;
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}
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test_and_allocate_result (ctx, encrypt);
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switch (code)
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{
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case GPGME_STATUS_EOF:
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status_handler_finish (ctx);
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break;
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case GPGME_STATUS_INV_RECP:
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ctx->result.encrypt->invalid_recipients++;
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append_xml_encinfo (&ctx->result.encrypt->xmlinfo, args);
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break;
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case GPGME_STATUS_NO_RECP:
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ctx->result.encrypt->no_valid_recipients = 1;
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break;
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default:
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break;
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}
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}
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void
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_gpgme_encrypt_sym_status_handler (GpgmeCtx ctx, GpgmeStatusCode code, char *args)
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{
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_gpgme_passphrase_status_handler (ctx, code, args);
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}
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static GpgmeError
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_gpgme_op_encrypt_start (GpgmeCtx ctx, int synchronous,
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GpgmeRecipients recp, GpgmeData plain, GpgmeData ciph)
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{
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GpgmeError err = 0;
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int symmetric = 0;
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/* Do some checks. */
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if (!recp)
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symmetric = 1;
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else if (!gpgme_recipients_count (recp))
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{
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err = mk_error (No_Recipients);
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goto leave;
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}
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err = _gpgme_op_reset (ctx, synchronous);
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if (err)
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goto leave;
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if (symmetric)
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{
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err = _gpgme_passphrase_start (ctx);
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if (err)
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goto leave;
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}
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_gpgme_engine_set_status_handler (ctx->engine,
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symmetric
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? _gpgme_encrypt_sym_status_handler
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: _gpgme_encrypt_status_handler,
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ctx);
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_gpgme_engine_set_verbosity (ctx->engine, ctx->verbosity);
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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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{
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err = 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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{
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err = 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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err = _gpgme_engine_op_encrypt (ctx->engine, recp, plain, ciph, ctx->use_armor);
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if (!err) /* And kick off the process. */
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err = _gpgme_engine_start (ctx->engine, ctx);
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leave:
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if (err)
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{
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ctx->pending = 0;
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_gpgme_engine_release (ctx->engine);
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ctx->engine = NULL;
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}
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return err;
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}
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GpgmeError
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gpgme_op_encrypt_start (GpgmeCtx ctx, GpgmeRecipients recp, GpgmeData plain,
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GpgmeData ciph)
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{
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return _gpgme_op_encrypt_start (ctx, 0, recp, plain, ciph);
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}
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/**
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* gpgme_op_encrypt:
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* @c: The context
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* @recp: A set of recipients
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* @in: plaintext input
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* @out: ciphertext output
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*
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* This function encrypts @in to @out for all recipients from
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* @recp. Other parameters are take from the context @c.
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* The function does wait for the result.
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*
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* Return value: 0 on success or an errorcode.
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**/
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GpgmeError
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gpgme_op_encrypt (GpgmeCtx ctx, GpgmeRecipients recp,
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GpgmeData plain, GpgmeData cipher)
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{
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int err = _gpgme_op_encrypt_start (ctx, 1, recp, plain, cipher);
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if (!err)
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{
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err = _gpgme_wait_one (ctx);
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/* Old gpg versions don't return status info for invalid
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recipients, so we simply check whether we got any output at
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all, and if not we assume that we don't have valid
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recipients. */
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if (!ctx->error && gpgme_data_get_type (cipher) == GPGME_DATA_TYPE_NONE)
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ctx->error = mk_error (No_Recipients);
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err = ctx->error;
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}
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return err;
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}
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