Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdepim@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 340 insertions, 0 deletions

diff --git a/libkdenetwork/libgpgme-copy/gpgme/decrypt.c b/libkdenetwork/libgpgme-copy/gpgme/decrypt.c
new file mode 100644
index 000000000..5ce21bad0
--- /dev/null
+++ b/libkdenetwork/libgpgme-copy/gpgme/decrypt.c
@@ -0,0 +1,340 @@
+/* decrypt.c - Decrypt function.
+   Copyright (C) 2000 Werner Koch (dd9jn)
+   Copyright (C) 2001, 2002, 2003, 2004 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., 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA.  */
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#include "gpgme.h"
+#include "util.h"
+#include "context.h"
+#include "ops.h"
+
+
+typedef struct
+{
+  struct _gpgme_op_decrypt_result result;
+
+  int okay;
+  int failed;
+  
+  /* A pointer to the next pointer of the last recipient in the list.
+     This makes appending new invalid signers painless while
+     preserving the order.  */
+  gpgme_recipient_t *last_recipient_p;
+} *op_data_t;
+
+
+static void
+release_op_data (void *hook)
+{
+  op_data_t opd = (op_data_t) hook;
+
+  if (opd->result.unsupported_algorithm)
+    free (opd->result.unsupported_algorithm);
+
+  if (opd->result.file_name)
+    free (opd->result.file_name);
+}
+
+
+gpgme_decrypt_result_t
+gpgme_op_decrypt_result (gpgme_ctx_t ctx)
+{
+  void *hook;
+  op_data_t opd;
+  gpgme_error_t err;
+
+  err = _gpgme_op_data_lookup (ctx, OPDATA_DECRYPT, &hook, -1, NULL);
+  opd = hook;
+  if (err || !opd)
+    return NULL;
+
+  return &opd->result;
+}
+
+
+static gpgme_error_t
+parse_enc_to (char *args, gpgme_recipient_t *recp)
+{
+  gpgme_recipient_t rec;
+  char *tail;
+  int i;
+
+  rec = malloc (sizeof (*rec));
+  if (!rec)
+    return gpg_error_from_errno (errno);
+
+  rec->next = NULL;
+  rec->keyid = rec->_keyid;
+  rec->status = 0;
+
+  for (i = 0; i < sizeof (rec->_keyid) - 1; i++)
+    {
+      if (args[i] == '\0' || args[i] == ' ')
+	break;
+
+      rec->_keyid[i] = args[i];
+    }
+  rec->_keyid[i] = '\0';
+
+  args = &args[i];
+  if (*args != '\0' && *args != ' ')
+    {
+      free (rec);
+      return gpg_error (GPG_ERR_INV_ENGINE);
+    }
+
+  while (*args == ' ')
+    args++;
+
+  if (*args)
+    {
+      errno = 0;
+      rec->pubkey_algo = strtol (args, &tail, 0);
+      if (errno || args == tail || *tail != ' ')
+	{
+	  /* The crypto backend does not behave.  */
+	  free (rec);
+	  return gpg_error (GPG_ERR_INV_ENGINE);
+	}
+    }
+
+  /* FIXME: The key length is always 0 right now, so no need to parse
+     it.  */
+
+  *recp = rec;
+  return 0;
+}
+
+
+gpgme_error_t
+_gpgme_decrypt_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_passphrase_status_handler (priv, code, args);
+  if (err)
+    return err;
+
+  err = _gpgme_op_data_lookup (ctx, OPDATA_DECRYPT, &hook, -1, NULL);
+  opd = hook;
+  if (err)
+    return err;
+
+  switch (code)
+    {
+    case GPGME_STATUS_EOF:
+      /* FIXME: These error values should probably be attributed to
+	 the underlying crypto engine (as error source).  */
+      if (opd->failed)
+	return gpg_error (GPG_ERR_DECRYPT_FAILED);
+      else if (!opd->okay)
+	return gpg_error (GPG_ERR_NO_DATA);
+      break;
+
+    case GPGME_STATUS_DECRYPTION_OKAY:
+      opd->okay = 1;
+      break;
+
+    case GPGME_STATUS_DECRYPTION_FAILED:
+      opd->failed = 1;
+      break;
+
+    case GPGME_STATUS_ERROR:
+      /* Note that this is an informational status code which should
+         not lead to an error return unless it is something not
+         related to the backend.  */
+      {
+	const char d_alg[] = "decrypt.algorithm";
+	const char u_alg[] = "Unsupported_Algorithm";
+	const char k_alg[] = "decrypt.keyusage";
+
+	if (!strncmp (args, d_alg, sizeof (d_alg) - 1))
+	  {
+	    args += sizeof (d_alg) - 1;
+	    while (*args == ' ')
+	      args++;
+
+	    if (!strncmp (args, u_alg, sizeof (u_alg) - 1))
+	      {
+		char *end;
+
+		args += sizeof (u_alg) - 1;
+		while (*args == ' ')
+		  args++;
+
+		end = strchr (args, ' ');
+		if (end)
+		  *end = '\0';
+
+		if (!(*args == '?' && *(args + 1) == '\0'))
+		  {
+		    opd->result.unsupported_algorithm = strdup (args);
+		    if (!opd->result.unsupported_algorithm)
+		      return gpg_error_from_errno (errno);
+		  }
+	      }
+	  }
+	else if (!strncmp (args, k_alg, sizeof (k_alg) - 1))
+	  {
+	    args += sizeof (k_alg) - 1;
+	    while (*args == ' ')
+	      args++;
+
+	    err = _gpgme_map_gnupg_error (args);
+	    if (gpg_err_code (err) == GPG_ERR_WRONG_KEY_USAGE)
+	      opd->result.wrong_key_usage = 1;
+	  }
+      }
+      break;
+
+    case GPGME_STATUS_ENC_TO:
+      err = parse_enc_to (args, opd->last_recipient_p);
+      if (err)
+	return err;
+
+      opd->last_recipient_p = &(*opd->last_recipient_p)->next;
+      break;
+
+    case GPGME_STATUS_NO_SECKEY:
+      {
+	gpgme_recipient_t rec = opd->result.recipients;
+
+	while (rec)
+	  {
+	    if (!strcmp (rec->keyid, args))
+	      {
+		rec->status = gpg_error (GPG_ERR_NO_SECKEY);
+		break;
+	      }
+	    rec = rec->next;
+	  }
+	/* FIXME: Is this ok?  */
+	if (!rec)
+	  return gpg_error (GPG_ERR_INV_ENGINE);
+      }
+      break;
+
+    case GPGME_STATUS_PLAINTEXT:
+      err = _gpgme_parse_plaintext (args, &opd->result.file_name);
+      if (err)
+	return err;
+      
+    default:
+      break;
+    }
+
+  return 0;
+}
+
+
+static gpgme_error_t
+decrypt_status_handler (void *priv, gpgme_status_code_t code, char *args)
+{
+  gpgme_error_t err;
+
+  err = _gpgme_progress_status_handler (priv, code, args);
+  if (!err)
+    err = _gpgme_decrypt_status_handler (priv, code, args);
+  return err;
+}
+
+
+gpgme_error_t
+_gpgme_op_decrypt_init_result (gpgme_ctx_t ctx)
+{
+  gpgme_error_t err;
+  void *hook;
+  op_data_t opd;
+
+  err = _gpgme_op_data_lookup (ctx, OPDATA_DECRYPT, &hook,
+			       sizeof (*opd), release_op_data);
+  opd = hook;
+  if (err)
+    return err;
+
+  opd->last_recipient_p = &opd->result.recipients;
+  return 0;
+}
+
+
+static gpgme_error_t
+decrypt_start (gpgme_ctx_t ctx, int synchronous,
+		      gpgme_data_t cipher, gpgme_data_t plain)
+{
+  gpgme_error_t err;
+
+  err = _gpgme_op_reset (ctx, synchronous);
+  if (err)
+    return err;
+
+  err = _gpgme_op_decrypt_init_result (ctx);
+  if (err)
+    return err;
+
+  if (!cipher)
+    return gpg_error (GPG_ERR_NO_DATA);
+  if (!plain)
+    return gpg_error (GPG_ERR_INV_VALUE);
+
+  if (err)
+    return err;
+
+  if (ctx->passphrase_cb)
+    {
+      err = _gpgme_engine_set_command_handler
+	(ctx->engine, _gpgme_passphrase_command_handler, ctx, NULL);
+      if (err)
+	return err;
+    }
+
+  _gpgme_engine_set_status_handler (ctx->engine, decrypt_status_handler, ctx);
+
+  return _gpgme_engine_op_decrypt (ctx->engine, cipher, plain);
+}
+
+
+gpgme_error_t
+gpgme_op_decrypt_start (gpgme_ctx_t ctx, gpgme_data_t cipher,
+			gpgme_data_t plain)
+{
+  return decrypt_start (ctx, 0, cipher, plain);
+}
+
+
+/* Decrypt ciphertext CIPHER within CTX and store the resulting
+   plaintext in PLAIN.  */
+gpgme_error_t
+gpgme_op_decrypt (gpgme_ctx_t ctx, gpgme_data_t cipher, gpgme_data_t plain)
+{
+  gpgme_error_t err = decrypt_start (ctx, 1, cipher, plain);
+  if (!err)
+    err = _gpgme_wait_one (ctx);
+  return err;
+}