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authorAnas Nashif <anas.nashif@intel.com>2013-02-19 08:22:18 -0800
committerAnas Nashif <anas.nashif@intel.com>2013-02-19 08:22:18 -0800
commit26fb537f9cf011eaeaf975adcad5e8e9154d04fd (patch)
treeddc2171273fca8b730b9c496e1b5ed3b01878577 /src/passwd.c
downloadgpgme-upstream/1.3.2.tar.gz
gpgme-upstream/1.3.2.tar.bz2
gpgme-upstream/1.3.2.zip
Imported Upstream version 1.3.2upstream/1.3.2
Diffstat (limited to 'src/passwd.c')
-rw-r--r--src/passwd.c187
1 files changed, 187 insertions, 0 deletions
diff --git a/src/passwd.c b/src/passwd.c
new file mode 100644
index 0000000..97b6960
--- /dev/null
+++ b/src/passwd.c
@@ -0,0 +1,187 @@
+/* passwd.c - Passphrase changing function
+ Copyright (C) 2010 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 <http://www.gnu.org/licenses/>.
+ */
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdlib.h>
+
+#include "gpgme.h"
+#include "debug.h"
+#include "context.h"
+#include "ops.h"
+
+
+typedef struct
+{
+ int success_seen;
+ int error_seen;
+} *op_data_t;
+
+
+
+/* Parse an error status line and return the error code. */
+static gpgme_error_t
+parse_error (char *args)
+{
+ gpgme_error_t err;
+ char *where = strchr (args, ' ');
+ char *which;
+
+ if (where)
+ {
+ *where = '\0';
+ which = where + 1;
+
+ where = strchr (which, ' ');
+ if (where)
+ *where = '\0';
+
+ where = args;
+ }
+ else
+ return gpg_error (GPG_ERR_INV_ENGINE);
+
+ err = atoi (which);
+
+ if (!strcmp (where, "keyedit.passwd"))
+ return err;
+
+ return 0;
+}
+
+
+static gpgme_error_t
+passwd_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;
+
+ err = _gpgme_op_data_lookup (ctx, OPDATA_PASSWD, &hook, -1, NULL);
+ opd = hook;
+ if (err)
+ return err;
+
+ switch (code)
+ {
+ case GPGME_STATUS_ERROR:
+ err = parse_error (args);
+ if (err)
+ opd->error_seen = 1;
+ break;
+
+ case GPGME_STATUS_SUCCESS:
+ opd->success_seen = 1;
+ break;
+
+ case GPGME_STATUS_EOF:
+ /* In case the OpenPGP engine does not properly implement the
+ passwd command we won't get a success status back and thus we
+ conclude that this operation is not supported. This is for
+ example the case for GnuPG < 2.0.16. Note that this test is
+ obsolete for assuan based engines because they will properly
+ return an error for an unknown command. */
+ if (ctx->protocol == GPGME_PROTOCOL_OpenPGP
+ && !opd->error_seen && !opd->success_seen)
+ err = gpg_error (GPG_ERR_NOT_SUPPORTED);
+ break;
+
+ default:
+ break;
+ }
+
+ return err;
+}
+
+
+static gpgme_error_t
+passwd_start (gpgme_ctx_t ctx, int synchronous, gpgme_key_t key,
+ unsigned int flags)
+{
+ gpgme_error_t err;
+ void *hook;
+ op_data_t opd;
+
+ if (!key)
+ return gpg_error (GPG_ERR_INV_VALUE);
+ if (flags)
+ return gpg_error (GPG_ERR_INV_FLAG);
+
+ err = _gpgme_op_reset (ctx, synchronous);
+ if (err)
+ return err;
+
+ err = _gpgme_op_data_lookup (ctx, OPDATA_PASSWD, &hook, sizeof (*opd), NULL);
+ opd = hook;
+ if (err)
+ return err;
+
+ opd->success_seen = 0;
+ opd->error_seen = 0;
+
+ _gpgme_engine_set_status_handler (ctx->engine, passwd_status_handler, ctx);
+
+ return _gpgme_engine_op_passwd (ctx->engine, key, flags);
+}
+
+
+
+/* Change the passphrase for KEY. FLAGS is reserved for future use
+ and must be passed as 0. The engine is expected to present a user
+ interface to enter the old and the new passphrase. This is the
+ asynchronous variant.
+
+ Note that if ever the need arises to supply a passphrase we can do
+ this with a flag value and the passphrase callback feature. */
+gpgme_error_t
+gpgme_op_passwd_start (gpgme_ctx_t ctx, gpgme_key_t key, unsigned int flags)
+{
+ gpg_error_t err;
+ TRACE_BEG2 (DEBUG_CTX, "gpgme_op_passwd_start", ctx,
+ "key=%p, flags=0x%x", key, flags);
+
+ if (!ctx)
+ return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
+
+ err = passwd_start (ctx, 0, key, flags);
+ return TRACE_ERR (err);
+}
+
+
+/* Change the passphrase for KEY. FLAGS is reserved for future use
+ and must be passed as 0. This is the synchronous variant. */
+gpgme_error_t
+gpgme_op_passwd (gpgme_ctx_t ctx, gpgme_key_t key, unsigned int flags)
+{
+ gpgme_error_t err;
+
+ TRACE_BEG2 (DEBUG_CTX, "gpgme_op_passwd", ctx,
+ "key=%p, flags=0x%x", key, flags);
+
+ if (!ctx)
+ return TRACE_ERR (gpg_error (GPG_ERR_INV_VALUE));
+
+ err = passwd_start (ctx, 1, key, flags);
+ if (!err)
+ err = _gpgme_wait_one (ctx);
+ return TRACE_ERR (err);
+}
+