Add an API to change passphrases. Currently only implemented for

GPGSM.  Requires GnuPG 2.1

1 files changed, 95 insertions, 0 deletions

diff --git a/src/passwd.c b/src/passwd.c
new file mode 100644
index 00000000..d189814d
--- /dev/null
+++ b/src/passwd.c
@@ -0,0 +1,95 @@
+/* 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 "gpgme.h"
+#include "debug.h"
+#include "context.h"
+#include "ops.h"
+
+
+static gpgme_error_t
+passwd_status_handler (void *priv, gpgme_status_code_t code, char *args)
+{
+  (void)priv;
+  (void)code;
+  (void)args;
+  return 0;
+}
+
+
+static gpgme_error_t
+passwd_start (gpgme_ctx_t ctx, int synchronous, gpgme_key_t key,
+              unsigned int flags)
+{
+  gpgme_error_t err;
+
+  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;
+
+  _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);
+  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);
+
+  err = passwd_start (ctx, 1, key, flags);
+  if (!err)
+    err = _gpgme_wait_one (ctx);
+  return TRACE_ERR (err);
+}
+