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/* export.c - Export a key.
Copyright (C) 2000 Werner Koch (dd9jn)
Copyright (C) 2001-2004, 2010, 2014 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 Lesser General Public License as
published by the Free Software Foundation; either version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include "gpgme.h"
#include "util.h"
#include "debug.h"
#include "context.h"
#include "ops.h"
/* Local operation data. */
typedef struct
{
gpg_error_t err; /* Error encountered during the export. */
} *op_data_t;
static void
release_op_data (void *hook)
{
op_data_t opd = (op_data_t) hook;
(void)opd; /* Nothing to release here. */
}
/* Parse an error status line. Return the error location and the
error code. The function may modify ARGS. */
static char *
parse_error (char *args, gpg_error_t *r_err)
{
char *where = strchr (args, ' ');
char *which;
if (where)
{
*where = '\0';
which = where + 1;
where = strchr (which, ' ');
if (where)
*where = '\0';
where = args;
}
else
{
*r_err = trace_gpg_error (GPG_ERR_INV_ENGINE);
return NULL;
}
*r_err = atoi (which);
return where;
}
static gpgme_error_t
export_status_handler (void *priv, gpgme_status_code_t code, char *args)
{
gpgme_ctx_t ctx = (gpgme_ctx_t) priv;
gpgme_error_t err;
void *hook;
op_data_t opd;
const char *loc;
err = _gpgme_op_data_lookup (ctx, OPDATA_EXPORT, &hook, -1, NULL);
opd = hook;
if (err)
return err;
switch (code)
{
case GPGME_STATUS_ERROR:
loc = parse_error (args, &err);
if (!loc)
return err;
else if (opd->err)
; /* We only want to report the first error. */
else if (!strcmp (loc, "keyserver_send"))
opd->err = err;
break;
default:
break;
}
return 0;
}
static gpgme_error_t
export_start (gpgme_ctx_t ctx, int synchronous, const char *pattern,
gpgme_export_mode_t mode, gpgme_data_t keydata)
{
gpgme_error_t err;
void *hook;
op_data_t opd;
if ((mode & ~(GPGME_EXPORT_MODE_EXTERN
|GPGME_EXPORT_MODE_MINIMAL
|GPGME_EXPORT_MODE_SECRET
|GPGME_EXPORT_MODE_RAW
|GPGME_EXPORT_MODE_PKCS12)))
return gpg_error (GPG_ERR_INV_VALUE); /* Invalid flags in MODE. */
if ((mode & GPGME_EXPORT_MODE_SECRET))
{
if ((mode & GPGME_EXPORT_MODE_EXTERN))
return gpg_error (GPG_ERR_INV_FLAG); /* Combination not allowed. */
if ((mode & GPGME_EXPORT_MODE_RAW)
&& (mode & GPGME_EXPORT_MODE_PKCS12))
return gpg_error (GPG_ERR_INV_FLAG); /* Combination not allowed. */
if (ctx->protocol != GPGME_PROTOCOL_CMS
&& (mode & (GPGME_EXPORT_MODE_RAW|GPGME_EXPORT_MODE_PKCS12)))
return gpg_error (GPG_ERR_INV_FLAG); /* Only supported for X.509. */
}
if ((mode & GPGME_EXPORT_MODE_EXTERN))
{
if (keydata)
return gpg_error (GPG_ERR_INV_VALUE);
}
else
{
if (!keydata)
return gpg_error (GPG_ERR_INV_VALUE);
}
err = _gpgme_op_reset (ctx, synchronous);
if (err)
return err;
err = _gpgme_op_data_lookup (ctx, OPDATA_EXPORT, &hook,
sizeof (*opd), release_op_data);
opd = hook;
if (err)
return err;
_gpgme_engine_set_status_handler (ctx->engine, export_status_handler, ctx);
return _gpgme_engine_op_export (ctx->engine, pattern, mode, keydata,
ctx->use_armor);
}
/* Export the keys listed in PATTERN into KEYDATA. */
gpgme_error_t
gpgme_op_export_start (gpgme_ctx_t ctx, const char *pattern,
gpgme_export_mode_t mode, gpgme_data_t keydata)
{
gpgme_error_t err;
TRACE_BEG3 (DEBUG_CTX, "gpgme_op_export_start", ctx,
"pattern=%s, mode=0x%x, keydata=%p", pattern, mode, keydata);
if (!ctx)
return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
err = export_start (ctx, 0, pattern, mode, keydata);
return TRACE_ERR (err);
}
/* Export the keys listed in PATTERN into KEYDATA. */
gpgme_error_t
gpgme_op_export (gpgme_ctx_t ctx, const char *pattern,
gpgme_export_mode_t mode, gpgme_data_t keydata)
{
gpgme_error_t err;
TRACE_BEG3 (DEBUG_CTX, "gpgme_op_export", ctx,
"pattern=%s, mode=0x%x, keydata=%p", pattern, mode, keydata);
if (!ctx)
return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
err = export_start (ctx, 1, pattern, mode, keydata);
if (!err)
err = _gpgme_wait_one (ctx);
return err;
}
static gpgme_error_t
export_ext_start (gpgme_ctx_t ctx, int synchronous, const char *pattern[],
gpgme_export_mode_t mode, gpgme_data_t keydata)
{
gpgme_error_t err;
void *hook;
op_data_t opd;
if ((mode & ~(GPGME_EXPORT_MODE_EXTERN
|GPGME_EXPORT_MODE_MINIMAL
|GPGME_EXPORT_MODE_SECRET
|GPGME_EXPORT_MODE_RAW
|GPGME_EXPORT_MODE_PKCS12)))
return gpg_error (GPG_ERR_INV_VALUE); /* Invalid flags in MODE. */
if ((mode & GPGME_EXPORT_MODE_SECRET))
{
if ((mode & GPGME_EXPORT_MODE_EXTERN))
return gpg_error (GPG_ERR_INV_FLAG); /* Combination not allowed. */
if ((mode & GPGME_EXPORT_MODE_RAW)
&& (mode & GPGME_EXPORT_MODE_PKCS12))
return gpg_error (GPG_ERR_INV_FLAG); /* Combination not allowed. */
if (ctx->protocol != GPGME_PROTOCOL_CMS
&& (mode & (GPGME_EXPORT_MODE_RAW|GPGME_EXPORT_MODE_PKCS12)))
return gpg_error (GPG_ERR_INV_FLAG); /* Only supported for X.509. */
}
if ((mode & GPGME_EXPORT_MODE_EXTERN))
{
if (keydata)
return gpg_error (GPG_ERR_INV_VALUE);
}
else
{
if (!keydata)
return gpg_error (GPG_ERR_INV_VALUE);
}
err = _gpgme_op_reset (ctx, synchronous);
if (err)
return err;
err = _gpgme_op_data_lookup (ctx, OPDATA_EXPORT, &hook,
sizeof (*opd), release_op_data);
opd = hook;
if (err)
return err;
_gpgme_engine_set_status_handler (ctx->engine, export_status_handler, ctx);
return _gpgme_engine_op_export_ext (ctx->engine, pattern, mode, keydata,
ctx->use_armor);
}
/* Export the keys listed in PATTERN into KEYDATA. */
gpgme_error_t
gpgme_op_export_ext_start (gpgme_ctx_t ctx, const char *pattern[],
gpgme_export_mode_t mode, gpgme_data_t keydata)
{
gpgme_error_t err;
TRACE_BEG2 (DEBUG_CTX, "gpgme_op_export_ext_start", ctx,
"mode=0x%x, keydata=%p", mode, keydata);
if (!ctx)
return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
if (_gpgme_debug_trace () && pattern)
{
int i = 0;
while (pattern[i])
{
TRACE_LOG2 ("pattern[%i] = %s", i, pattern[i]);
i++;
}
}
err = export_ext_start (ctx, 0, pattern, mode, keydata);
return TRACE_ERR (err);
}
/* Export the keys listed in PATTERN into KEYDATA. */
gpgme_error_t
gpgme_op_export_ext (gpgme_ctx_t ctx, const char *pattern[],
gpgme_export_mode_t mode, gpgme_data_t keydata)
{
gpgme_error_t err;
TRACE_BEG2 (DEBUG_CTX, "gpgme_op_export_ext_start", ctx,
"mode=0x%x, keydata=%p", mode, keydata);
if (!ctx)
return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
if (_gpgme_debug_trace () && pattern)
{
int i = 0;
while (pattern[i])
{
TRACE_LOG2 ("pattern[%i] = %s", i, pattern[i]);
i++;
}
}
err = export_ext_start (ctx, 1, pattern, mode, keydata);
if (!err)
{
err = _gpgme_wait_one (ctx);
if (!err)
{
/* For this synchronous operation we check for operational
errors and return them. For asynchronous operations
there is currently no way to do this - we need to add a
gpgme_op_export_result function to fix that. */
void *hook;
op_data_t opd;
err = _gpgme_op_data_lookup (ctx, OPDATA_EXPORT, &hook, -1, NULL);
opd = hook;
if (!err)
err = opd->err;
}
}
return TRACE_ERR (err);
}
static gpgme_error_t
export_keys_start (gpgme_ctx_t ctx, int synchronous, gpgme_key_t keys[],
gpgme_export_mode_t mode, gpgme_data_t keydata)
{
gpgme_error_t err;
int nkeys, idx;
char **pattern;
if (!keys)
return gpg_error (GPG_ERR_INV_VALUE);
/* Create a list of pattern from the keys. */
for (idx=nkeys=0; keys[idx]; idx++)
if (keys[idx]->protocol == ctx->protocol)
nkeys++;
if (!nkeys)
return gpg_error (GPG_ERR_NO_DATA);
pattern = calloc (nkeys+1, sizeof *pattern);
if (!pattern)
return gpg_error_from_syserror ();
for (idx=nkeys=0; keys[idx]; idx++)
if (keys[idx]->protocol == ctx->protocol
&& keys[idx]->subkeys
&& keys[idx]->subkeys->fpr
&& *keys[idx]->subkeys->fpr)
{
pattern[nkeys] = strdup (keys[idx]->subkeys->fpr);
if (!pattern[nkeys])
{
err = gpg_error_from_syserror ();
goto leave;
}
nkeys++;
}
/* Pass on to the regular function. */
err = export_ext_start (ctx, synchronous, (const char**)pattern,
mode, keydata);
leave:
for (idx=0; pattern[idx]; idx++)
free (pattern[idx]);
free (pattern);
return err;
}
/* Export the keys from the array KEYS into KEYDATA. Only keys of the
current protocol are exported and only those which have a
fingerprint set; that is keys received with some external search
methods are silently skipped. */
gpgme_error_t
gpgme_op_export_keys_start (gpgme_ctx_t ctx,
gpgme_key_t keys[],
gpgme_export_mode_t mode,
gpgme_data_t keydata)
{
gpg_error_t err;
TRACE_BEG2 (DEBUG_CTX, "gpgme_op_export_keys_start", ctx,
"mode=0x%x, keydata=%p", mode, keydata);
if (!ctx)
return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
if (_gpgme_debug_trace () && keys)
{
int i = 0;
while (keys[i])
{
TRACE_LOG3 ("keys[%i] = %p (%s)", i, keys[i],
(keys[i]->subkeys && keys[i]->subkeys->fpr) ?
keys[i]->subkeys->fpr : "invalid");
i++;
}
}
err = export_keys_start (ctx, 0, keys, mode, keydata);
return TRACE_ERR (err);
}
gpgme_error_t
gpgme_op_export_keys (gpgme_ctx_t ctx,
gpgme_key_t keys[],
gpgme_export_mode_t mode,
gpgme_data_t keydata)
{
gpgme_error_t err;
TRACE_BEG2 (DEBUG_CTX, "gpgme_op_export_keys", ctx,
"mode=0x%x, keydata=%p", mode, keydata);
if (!ctx)
return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
if (_gpgme_debug_trace () && keys)
{
int i = 0;
while (keys[i])
{
TRACE_LOG3 ("keys[%i] = %p (%s)", i, keys[i],
(keys[i]->subkeys && keys[i]->subkeys->fpr) ?
keys[i]->subkeys->fpr : "invalid");
i++;
}
}
err = export_keys_start (ctx, 1, keys, mode, keydata);
if (!err)
{
err = _gpgme_wait_one (ctx);
if (!err)
{
/* For this synchronous operation we check for operational
errors and return them. For asynchronous operations
there is currently no way to do this - we need to add a
gpgme_op_export_result function to fix that. */
void *hook;
op_data_t opd;
err = _gpgme_op_data_lookup (ctx, OPDATA_EXPORT, &hook, -1, NULL);
opd = hook;
if (!err)
err = opd->err;
}
}
return TRACE_ERR (err);
}

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