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/* encrypt.c - encrypt functions
* Copyright (C) 2000 Werner Koch (dd9jn)
* Copyright (C) 2001, 2002 g10 Code GmbH
*
* 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "util.h"
#include "context.h"
#include "ops.h"
#include "wait.h"
#define SKIP_TOKEN_OR_RETURN(a) do { \
while (*(a) && *(a) != ' ') (a)++; \
while (*(a) == ' ') (a)++; \
if (!*(a)) \
return; /* oops */ \
} while (0)
struct encrypt_result_s
{
int no_valid_recipients;
int invalid_recipients;
GpgmeData xmlinfo;
};
void
_gpgme_release_encrypt_result (EncryptResult result)
{
if (!result)
return;
gpgme_data_release (result->xmlinfo);
free (result);
}
/*
* Parse the args and save the information
* in an XML structure.
* With args of NULL the xml structure is closed.
*/
static void
append_xml_encinfo (GpgmeData *rdh, char *args)
{
GpgmeData dh;
char helpbuf[100];
if (!*rdh)
{
if (gpgme_data_new (rdh))
return; /* FIXME: We are ignoring out-of-core. */
dh = *rdh;
_gpgme_data_append_string (dh, "<GnupgOperationInfo>\n");
}
else
{
dh = *rdh;
_gpgme_data_append_string (dh, " </encryption>\n");
}
if (!args)
{
/* Just close the XML containter. */
_gpgme_data_append_string (dh, "</GnupgOperationInfo>\n");
return;
}
_gpgme_data_append_string (dh, " <encryption>\n"
" <error>\n"
" <invalidRecipient/>\n");
sprintf (helpbuf, " <reason>%d</reason>\n", atoi (args));
_gpgme_data_append_string (dh, helpbuf);
SKIP_TOKEN_OR_RETURN (args);
_gpgme_data_append_string (dh, " <name>");
_gpgme_data_append_percentstring_for_xml (dh, args);
_gpgme_data_append_string (dh, "</name>\n"
" </error>\n");
}
static void
status_handler_finish (GpgmeCtx ctx)
{
if (ctx->result.encrypt->xmlinfo)
{
append_xml_encinfo (&ctx->result.encrypt->xmlinfo, NULL);
_gpgme_set_op_info (ctx, ctx->result.encrypt->xmlinfo);
ctx->result.encrypt->xmlinfo = NULL;
}
if (ctx->error)
; /* already set by kludge in engine-gpgsm */
else if (ctx->result.encrypt->no_valid_recipients)
ctx->error = mk_error (No_Recipients);
else if (ctx->result.encrypt->invalid_recipients)
ctx->error = mk_error (Invalid_Recipients);
}
void
_gpgme_encrypt_status_handler (GpgmeCtx ctx, GpgmeStatusCode code, char *args)
{
if (ctx->error)
{
if (ctx->result.encrypt) /* check that we have allocated it. */
status_handler_finish (ctx);
return;
}
test_and_allocate_result (ctx, encrypt);
switch (code)
{
case GPGME_STATUS_EOF:
status_handler_finish (ctx);
break;
case GPGME_STATUS_INV_RECP:
ctx->result.encrypt->invalid_recipients++;
append_xml_encinfo (&ctx->result.encrypt->xmlinfo, args);
break;
case GPGME_STATUS_NO_RECP:
ctx->result.encrypt->no_valid_recipients = 1;
break;
default:
break;
}
}
void
_gpgme_encrypt_sym_status_handler (GpgmeCtx ctx, GpgmeStatusCode code, char *args)
{
_gpgme_passphrase_status_handler (ctx, code, args);
}
static GpgmeError
_gpgme_op_encrypt_start (GpgmeCtx ctx, int synchronous,
GpgmeRecipients recp, GpgmeData plain, GpgmeData ciph)
{
GpgmeError err = 0;
int symmetric = 0;
/* Do some checks. */
if (!recp)
symmetric = 1;
else if (!gpgme_recipients_count (recp))
{
err = mk_error (No_Recipients);
goto leave;
}
err = _gpgme_op_reset (ctx, synchronous);
if (err)
goto leave;
if (symmetric)
{
err = _gpgme_passphrase_start (ctx);
if (err)
goto leave;
}
_gpgme_engine_set_status_handler (ctx->engine,
symmetric
? _gpgme_encrypt_sym_status_handler
: _gpgme_encrypt_status_handler,
ctx);
_gpgme_engine_set_verbosity (ctx->engine, ctx->verbosity);
/* Check the supplied data */
if (!plain)
{
err = mk_error (No_Data);
goto leave;
}
if (!ciph)
{
err = mk_error (Invalid_Value);
goto leave;
}
err = _gpgme_engine_op_encrypt (ctx->engine, recp, plain, ciph, ctx->use_armor);
if (!err) /* And kick off the process. */
err = _gpgme_engine_start (ctx->engine, ctx);
leave:
if (err)
{
ctx->pending = 0;
_gpgme_engine_release (ctx->engine);
ctx->engine = NULL;
}
return err;
}
GpgmeError
gpgme_op_encrypt_start (GpgmeCtx ctx, GpgmeRecipients recp, GpgmeData plain,
GpgmeData ciph)
{
return _gpgme_op_encrypt_start (ctx, 0, recp, plain, ciph);
}
/**
* gpgme_op_encrypt:
* @c: The context
* @recp: A set of recipients
* @in: plaintext input
* @out: ciphertext output
*
* This function encrypts @in to @out for all recipients from
* @recp. Other parameters are take from the context @c.
* The function does wait for the result.
*
* Return value: 0 on success or an errorcode.
**/
GpgmeError
gpgme_op_encrypt (GpgmeCtx ctx, GpgmeRecipients recp,
GpgmeData plain, GpgmeData cipher)
{
int err = _gpgme_op_encrypt_start (ctx, 1, recp, plain, cipher);
if (!err)
err = _gpgme_wait_one (ctx);
return err;
}

File Metadata

Mime Type
text/x-c
Expires
Tue, Jan 20, 11:23 PM (11 h, 5 m)
Storage Engine
local-disk
Storage Format
Raw Data
Storage Handle
42/c0/128a12230c03197b74f1d62012f5

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