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tdepim/libtdenetwork/libgpgme-copy/gpgme/gpgme.c

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/* gpgme.c - GnuPG Made Easy.
Copyright (C) 2000 Werner Koch (dd9jn)
Copyright (C) 2001, 2002, 2003, 2004, 2005 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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <locale.h>
#include "util.h"
#include "context.h"
#include "ops.h"
#include "wait.h"
/* The default locale. */
DEFINE_STATIC_LOCK (def_lc_lock);
static char *def_lc_ctype;
static char *def_lc_messages;
/* Create a new context as an environment for GPGME crypto
operations. */
gpgme_error_t
gpgme_new (gpgme_ctx_t *r_ctx)
{
gpgme_ctx_t ctx;
ctx = calloc (1, sizeof *ctx);
if (!ctx)
return gpg_error_from_errno (errno);
_gpgme_engine_info_copy (&ctx->engine_info);
if (!ctx->engine_info)
{
free (ctx);
return gpg_error_from_errno (errno);
}
ctx->keylist_mode = GPGME_KEYLIST_MODE_LOCAL;
ctx->include_certs = GPGME_INCLUDE_CERTS_DEFAULT;
ctx->protocol = GPGME_PROTOCOL_OpenPGP;
_gpgme_fd_table_init (&ctx->fdt);
LOCK (def_lc_lock);
if (def_lc_ctype)
{
ctx->lc_ctype = strdup (def_lc_ctype);
if (!ctx->lc_ctype)
{
UNLOCK (def_lc_lock);
_gpgme_engine_info_release (ctx->engine_info);
free (ctx);
return gpg_error_from_errno (errno);
}
}
else
def_lc_ctype = NULL;
if (def_lc_messages)
{
ctx->lc_messages = strdup (def_lc_messages);
if (!ctx->lc_messages)
{
UNLOCK (def_lc_lock);
if (ctx->lc_ctype)
free (ctx->lc_ctype);
_gpgme_engine_info_release (ctx->engine_info);
free (ctx);
return gpg_error_from_errno (errno);
}
}
else
def_lc_messages = NULL;
UNLOCK (def_lc_lock);
*r_ctx = ctx;
return 0;
}
/* Cancel a pending asynchronous operation. */
gpgme_error_t
gpgme_cancel (gpgme_ctx_t ctx)
{
gpgme_error_t err;
err = _gpgme_engine_cancel (ctx->engine);
if (err)
return err;
err = gpg_error (GPG_ERR_CANCELED);
_gpgme_engine_io_event (ctx->engine, GPGME_EVENT_DONE, &err);
return 0;
}
/* Release all resources associated with the given context. */
void
gpgme_release (gpgme_ctx_t ctx)
{
_gpgme_engine_release (ctx->engine);
_gpgme_fd_table_deinit (&ctx->fdt);
_gpgme_release_result (ctx);
gpgme_signers_clear (ctx);
if (ctx->signers)
free (ctx->signers);
if (ctx->lc_ctype)
free (ctx->lc_ctype);
if (ctx->lc_messages)
free (ctx->lc_messages);
_gpgme_engine_info_release (ctx->engine_info);
free (ctx);
}
void
_gpgme_release_result (gpgme_ctx_t ctx)
{
struct ctx_op_data *data = ctx->op_data;
while (data)
{
struct ctx_op_data *next_data = data->next;
if (data->cleanup)
(*data->cleanup) (data->hook);
free (data);
data = next_data;
}
ctx->op_data = NULL;
}
gpgme_error_t
gpgme_set_protocol (gpgme_ctx_t ctx, gpgme_protocol_t protocol)
{
if (protocol != GPGME_PROTOCOL_OpenPGP && protocol != GPGME_PROTOCOL_CMS)
return gpg_error (GPG_ERR_INV_VALUE);
if (ctx->protocol != protocol)
{
/* Shut down the engine when switching protocols. */
if (ctx->engine)
{
_gpgme_engine_release (ctx->engine);
ctx->engine = NULL;
}
ctx->protocol = protocol;
}
return 0;
}
gpgme_protocol_t
gpgme_get_protocol (gpgme_ctx_t ctx)
{
return ctx->protocol;
}
const char *
gpgme_get_protocol_name (gpgme_protocol_t protocol)
{
switch (protocol)
{
case GPGME_PROTOCOL_OpenPGP:
return "OpenPGP";
case GPGME_PROTOCOL_CMS:
return "CMS";
default:
return NULL;
}
}
/* Enable or disable the use of an ascii armor for all output. */
void
gpgme_set_armor (gpgme_ctx_t ctx, int yes)
{
ctx->use_armor = yes;
}
/* Return the state of the armor flag. */
int
gpgme_get_armor (gpgme_ctx_t ctx)
{
return ctx->use_armor;
}
/* Enable or disable the use of the special textmode. Textmode is for
example used for the RFC2015 signatures; note that the updated RFC
3156 mandates that the MUA does some preparations so that textmode
is not needed anymore. */
void
gpgme_set_textmode (gpgme_ctx_t ctx, int yes)
{
ctx->use_textmode = yes;
}
/* Return the state of the textmode flag. */
int
gpgme_get_textmode (gpgme_ctx_t ctx)
{
return ctx->use_textmode;
}
/* Set the number of certifications to include in an S/MIME message.
The default is GPGME_INCLUDE_CERTS_DEFAULT. -1 means all certs,
and -2 means all certs except the root cert. */
void
gpgme_set_include_certs (gpgme_ctx_t ctx, int nr_of_certs)
{
if (nr_of_certs == GPGME_INCLUDE_CERTS_DEFAULT)
ctx->include_certs = GPGME_INCLUDE_CERTS_DEFAULT;
else if (nr_of_certs < -2)
ctx->include_certs = -2;
else
ctx->include_certs = nr_of_certs;
}
/* Get the number of certifications to include in an S/MIME
message. */
int
gpgme_get_include_certs (gpgme_ctx_t ctx)
{
return ctx->include_certs;
}
/* This function changes the default behaviour of the keylisting
functions. MODE is a bitwise-OR of the GPGME_KEYLIST_* flags. The
default mode is GPGME_KEYLIST_MODE_LOCAL. */
gpgme_error_t
gpgme_set_keylist_mode (gpgme_ctx_t ctx, gpgme_keylist_mode_t mode)
{
ctx->keylist_mode = mode;
return 0;
}
/* This function returns the default behaviour of the keylisting
functions. */
gpgme_keylist_mode_t
gpgme_get_keylist_mode (gpgme_ctx_t ctx)
{
return ctx->keylist_mode;
}
/* This function sets a callback function to be used to pass a
passphrase to gpg. */
void
gpgme_set_passphrase_cb (gpgme_ctx_t ctx, gpgme_passphrase_cb_t cb,
void *cb_value)
{
ctx->passphrase_cb = cb;
ctx->passphrase_cb_value = cb_value;
}
/* This function returns the callback function to be used to pass a
passphrase to the crypto engine. */
void
gpgme_get_passphrase_cb (gpgme_ctx_t ctx, gpgme_passphrase_cb_t *r_cb,
void **r_cb_value)
{
if (r_cb)
*r_cb = ctx->passphrase_cb;
if (r_cb_value)
*r_cb_value = ctx->passphrase_cb_value;
}
/* This function sets a callback function to be used as a progress
indicator. */
void
gpgme_set_progress_cb (gpgme_ctx_t ctx, gpgme_progress_cb_t cb, void *cb_value)
{
ctx->progress_cb = cb;
ctx->progress_cb_value = cb_value;
}
/* This function returns the callback function to be used as a
progress indicator. */
void
gpgme_get_progress_cb (gpgme_ctx_t ctx, gpgme_progress_cb_t *r_cb,
void **r_cb_value)
{
if (r_cb)
*r_cb = ctx->progress_cb;
if (r_cb_value)
*r_cb_value = ctx->progress_cb_value;
}
/* Set the I/O callback functions for CTX to IO_CBS. */
void
gpgme_set_io_cbs (gpgme_ctx_t ctx, gpgme_io_cbs_t io_cbs)
{
if (io_cbs)
ctx->io_cbs = *io_cbs;
else
{
ctx->io_cbs.add = NULL;
ctx->io_cbs.add_priv = NULL;
ctx->io_cbs.remove = NULL;
ctx->io_cbs.event = NULL;
ctx->io_cbs.event_priv = NULL;
}
}
/* This function returns the callback function for I/O. */
void
gpgme_get_io_cbs (gpgme_ctx_t ctx, gpgme_io_cbs_t io_cbs)
{
*io_cbs = ctx->io_cbs;
}
/* This function sets the locale for the context CTX, or the default
locale if CTX is a null pointer. */
gpgme_error_t
gpgme_set_locale (gpgme_ctx_t ctx, int category, const char *value)
{
int failed = 0;
char *new_lc_ctype = NULL;
char *new_lc_messages = NULL;
#define PREPARE_ONE_LOCALE(lcat, ucat) \
if (!failed && value \
&& (category == LC_ALL || category == LC_ ## ucat)) \
{ \
new_lc_ ## lcat = strdup (value); \
if (!new_lc_ ## lcat) \
failed = 1; \
}
PREPARE_ONE_LOCALE (ctype, CTYPE);
#ifdef LC_MESSAGES
PREPARE_ONE_LOCALE (messages, MESSAGES);
#endif
if (failed)
{
int saved_errno = errno;
if (new_lc_ctype)
free (new_lc_ctype);
if (new_lc_messages)
free (new_lc_messages);
return gpg_error_from_errno (saved_errno);
}
#define SET_ONE_LOCALE(lcat, ucat) \
if (category == LC_ALL || category == LC_ ## ucat) \
{ \
if (ctx) \
{ \
if (ctx->lc_ ## lcat) \
free (ctx->lc_ ## lcat); \
ctx->lc_ ## lcat = new_lc_ ## lcat; \
} \
else \
{ \
if (def_lc_ ## lcat) \
free (def_lc_ ## lcat); \
def_lc_ ## lcat = new_lc_ ## lcat; \
} \
}
if (!ctx)
LOCK (def_lc_lock);
SET_ONE_LOCALE (ctype, CTYPE);
#ifdef LC_MESSAGES
SET_ONE_LOCALE (messages, MESSAGES);
#endif
if (!ctx)
UNLOCK (def_lc_lock);
return 0;
}
/* Get the information about the configured engines. A pointer to the
first engine in the statically allocated linked list is returned.
The returned data is valid until the next gpgme_ctx_set_engine_info. */
gpgme_engine_info_t
gpgme_ctx_get_engine_info (gpgme_ctx_t ctx)
{
return ctx->engine_info;
}
/* Set the engine info for the context CTX, protocol PROTO, to the
file name FILE_NAME and the home directory HOME_DIR. */
gpgme_error_t
gpgme_ctx_set_engine_info (gpgme_ctx_t ctx, gpgme_protocol_t proto,
const char *file_name, const char *home_dir)
{
/* Shut down the engine when changing engine info. */
if (ctx->engine)
{
_gpgme_engine_release (ctx->engine);
ctx->engine = NULL;
}
return _gpgme_set_engine_info (ctx->engine_info, proto,
file_name, home_dir);
}
/* Clear all notation data from the context. */
void
gpgme_sig_notation_clear (gpgme_ctx_t ctx)
{
gpgme_sig_notation_t notation;
if (!ctx)
return;
notation = ctx->sig_notations;
while (notation)
{
gpgme_sig_notation_t next_notation = notation->next;
_gpgme_sig_notation_free (notation);
notation = next_notation;
}
}
/* Add the human-readable notation data with name NAME and value VALUE
to the context CTX, using the flags FLAGS. If NAME is NULL, then
VALUE should be a policy URL. The flag
GPGME_SIG_NOTATION_HUMAN_READABLE is forced to be true for notation
data, and false for policy URLs. */
gpgme_error_t
gpgme_sig_notation_add (gpgme_ctx_t ctx, const char *name,
const char *value, gpgme_sig_notation_flags_t flags)
{
gpgme_error_t err;
gpgme_sig_notation_t notation;
gpgme_sig_notation_t *lastp;
if (!ctx)
gpg_error (GPG_ERR_INV_VALUE);
if (name)
flags |= GPGME_SIG_NOTATION_HUMAN_READABLE;
else
flags &= ~GPGME_SIG_NOTATION_HUMAN_READABLE;
err = _gpgme_sig_notation_create (&notation, name, name ? strlen (name) : 0,
value, value ? strlen (value) : 0, flags);
if (err)
return err;
lastp = &ctx->sig_notations;
while (*lastp)
lastp = &(*lastp)->next;
*lastp = notation;
return 0;
}
/* Get the sig notations for this context. */
gpgme_sig_notation_t
gpgme_sig_notation_get (gpgme_ctx_t ctx)
{
if (!ctx)
return NULL;
return ctx->sig_notations;
}
const char *
gpgme_pubkey_algo_name (gpgme_pubkey_algo_t algo)
{
switch (algo)
{
case GPGME_PK_RSA:
return "RSA";
case GPGME_PK_RSA_E:
return "RSA-E";
case GPGME_PK_RSA_S:
return "RSA-S";
case GPGME_PK_ELG_E:
return "ELG-E";
case GPGME_PK_DSA:
return "DSA";
case GPGME_PK_ELG:
return "ELG";
default:
return NULL;
}
}
const char *
gpgme_hash_algo_name (gpgme_hash_algo_t algo)
{
switch (algo)
{
case GPGME_MD_MD5:
return "MD5";
case GPGME_MD_SHA1:
return "SHA1";
case GPGME_MD_RMD160:
return "RIPEMD160";
case GPGME_MD_MD2:
return "MD2";
case GPGME_MD_TIGER:
return "TIGER192";
case GPGME_MD_HAVAL:
return "HAVAL";
case GPGME_MD_SHA256:
return "SHA256";
case GPGME_MD_SHA384:
return "SHA384";
case GPGME_MD_SHA512:
return "SHA512";
case GPGME_MD_MD4:
return "MD4";
case GPGME_MD_CRC32:
return "CRC32";
case GPGME_MD_CRC32_RFC1510:
return "CRC32RFC1510";
case GPGME_MD_CRC24_RFC2440:
return "CRC24RFC2440";
default:
return NULL;
}
}