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/* wptClipboard.cpp |
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* Copyright (C) 2001, 2002, 2003, 2005 Timo Schulz |
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* Copyright (C) 2005 g10 Code GmbH |
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* |
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* This file is part of WinPT. |
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* |
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* WinPT is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* WinPT is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with WinPT; if not, write to the Free Software Foundation, |
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
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*/ |
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|
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#ifdef HAVE_CONFIG_H |
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#include <config.h> |
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#endif |
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|
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#include <windows.h> |
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#include <gpgme.h> |
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|
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#include "wptW32API.h" |
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#include "wptCrypto.h" |
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#include "wptVersion.h" |
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#include "wptGPG.h" |
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#include "wptTypes.h" |
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|
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/* Default buffer size. */ |
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#define BUFSIZE 192 |
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|
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gpgme_error_t gpg_data_wrap_lines (gpgme_data_t *r_dh, size_t wraplen); |
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|
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/* XXX: define clipboard errors. */ |
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|
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/* Check if the clipboard contains text. @r_val contains |
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one text data is available. |
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Return value: 0 on success. */ |
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gpgme_error_t |
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gpg_clip_istext_avail (int *r_val) |
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{ |
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HANDLE clipmem; |
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char *clipdata; |
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|
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if (!r_val) |
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return gpg_error (GPG_ERR_INV_ARG); |
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if (OpenClipboard (NULL) == FALSE) |
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return gpg_error (GPG_ERR_NO_DATA); |
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|
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*r_val = 0; |
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clipmem = GetClipboardData (CF_TEXT); |
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if (!clipmem) |
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goto leave; |
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|
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clipdata = (char *) GlobalLock (clipmem); |
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if (!clipdata) |
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goto leave; |
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if (strlen (clipdata) > 0) |
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*r_val = 1; |
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GlobalUnlock (clipmem); |
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|
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leave: |
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CloseClipboard (); |
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return 0; |
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} |
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|
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|
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/* Figure out what kind of PGP data is stored in @data. |
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@r_type contains the ORed types on success. |
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Return value: 0 on success. */ |
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gpgme_error_t |
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gpg_clip_parse_pgpid (const char *data, int *r_type) |
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{ |
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int type; |
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|
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if (!data) |
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return gpg_error (GPG_ERR_INV_ARG); |
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if (strlen (data) < 19) { |
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*r_type = 0; |
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return 0; |
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} |
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type = 0; |
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if (strstr( data, "BEGIN PGP MESSAGE") ) |
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type |= PGP_MESSAGE; |
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if (strstr (data, "BEGIN PGP SIGNED MESSAGE")) |
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type |= PGP_CLEARSIG; |
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if (strstr (data, "BEGIN PGP SIGNATURE")) |
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type |= PGP_SIG; |
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if (strstr (data, "BEGIN PGP PUBLIC KEY BLOCK")) |
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type |= PGP_PUBKEY; |
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if (strstr (data, "BEGIN PGP PRIVATE KEY BLOCK") || |
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strstr (data, "BEGIN PGP SECRET KEY BLOCK")) |
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type |= PGP_SECKEY; |
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if (strstr (data, "- -----BEGIN")) |
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type |= PGP_DASH_ESCAPED; |
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*r_type = type; |
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return 0; |
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} |
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|
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|
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/* Check if the clipboard is already OpenPGP protected. |
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@r_type optional returns the type and @r_val contains |
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1 for yes. |
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Return value: 0 on success. */ |
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gpgme_error_t |
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gpg_clip_is_secured (int *r_type, int *r_val) |
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{ |
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int rc = 0; |
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HANDLE clipmem; |
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char *clipdata; |
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|
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if (!r_val) |
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return gpg_error (GPG_ERR_INV_ARG); |
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if (OpenClipboard (NULL) == FALSE) |
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return gpg_error (GPG_ERR_INTERNAL); |
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clipmem = GetClipboardData (CF_TEXT); |
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if (!clipmem) { |
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*r_val = 0; |
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goto leave; |
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} |
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clipdata = (char *) GlobalLock (clipmem); |
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if (!clipdata) { |
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*r_val = 0; |
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goto leave; |
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} |
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if (strstr (clipdata, "-----BEGIN PGP") |
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&& strstr (clipdata, "-----END PGP")) |
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*r_val = 1; |
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GlobalUnlock (clipmem); |
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gpg_clip_parse_pgpid (clipdata, r_type); |
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|
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leave: |
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CloseClipboard (); |
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return rc; |
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} |
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|
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|
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/* Return the OpenPGP data format of the clipboard in @r_type. |
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Return 0 on success. */ |
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gpgme_error_t |
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gpg_clip_get_pgptype (int *r_type) |
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{ |
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gpgme_error_t rc = 0; |
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HANDLE clipmem; |
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char *clipdata; |
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|
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if (OpenClipboard (NULL) == FALSE) |
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return gpg_error (GPG_ERR_INTERNAL); |
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clipmem = GetClipboardData (CF_TEXT); |
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if (!clipmem) { |
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rc = gpg_error (GPG_ERR_NO_DATA); |
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goto leave; |
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} |
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clipdata = (char *)GlobalLock( clipmem ); |
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if (!clipdata) { |
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rc = gpg_error (GPG_ERR_NO_DATA); |
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goto leave; |
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} |
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gpg_clip_parse_pgpid (clipdata, r_type); |
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GlobalUnlock (clipmem); |
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|
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leave: |
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CloseClipboard (); |
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return rc; |
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} |
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|
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|
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/* Retrieve the thext of the clipboard. |
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Return value: the text as a string, NULL otherwise. */ |
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static char* |
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get_w32_clip_text (void) |
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{ |
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char *private_clip = NULL; |
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char *clip = NULL; |
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size_t size; |
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HANDLE cb; |
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|
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if (!OpenClipboard (NULL)) |
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return NULL; |
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cb = GetClipboardData (CF_TEXT); |
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if (!cb) |
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goto leave; |
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private_clip = (char *)GlobalLock (cb); |
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if (!private_clip) |
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goto leave; |
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size = strlen (private_clip); |
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clip = (char*)malloc (size + 1); |
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if (!clip) { |
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GlobalUnlock (cb); |
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goto leave; |
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} |
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memcpy (clip, private_clip, size); |
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clip[size] = '\0'; |
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GlobalUnlock(cb); |
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|
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leave: |
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CloseClipboard (); |
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return clip; |
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} |
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|
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|
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/* Set the new clipboard data to @data. */ |
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static void |
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set_w32_clip_text (const char *data, int size) |
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{ |
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HANDLE cb; |
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char *private_data; |
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|
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if (!OpenClipboard(NULL)) |
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return; |
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EmptyClipboard (); |
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cb = GlobalAlloc (GHND, size+1); |
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if (!cb) |
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goto leave; |
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private_data = (char*)GlobalLock (cb); |
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if (!private_data) |
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goto leave; |
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memcpy (private_data, data, size); |
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private_data[size] = '\0'; |
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SetClipboardData (CF_TEXT, cb); |
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GlobalUnlock (cb); |
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|
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leave: |
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CloseClipboard (); |
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GlobalFree (cb); |
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} |
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|
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|
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/* Retrieve the clipboard data and create a new gpgme |
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data object @r_dh and return it. If @wraplen is > 0 |
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wrap lines of the buffer. |
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Return value: 0 on success. */ |
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gpgme_error_t |
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gpg_data_new_from_clipboard (gpgme_data_t *r_dh, int wraplen) |
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{ |
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gpgme_error_t err = 0; |
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gpgme_data_t dh; |
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char *clip_text = NULL; |
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|
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if (!r_dh) |
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return gpg_error (GPG_ERR_INV_ARG); |
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*r_dh = NULL; |
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clip_text = get_w32_clip_text (); |
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if (!clip_text) |
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return gpg_error (GPG_ERR_NO_DATA); |
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err = gpgme_data_new_from_mem (&dh, clip_text, strlen (clip_text), 1); |
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if (clip_text) |
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free (clip_text); |
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if (wraplen > 0) |
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gpg_data_wrap_lines (&dh, wraplen); |
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|
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*r_dh = dh; |
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return err; |
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} |
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|
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|
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/* Search for the armor header 'Version:' in @r_dh and |
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add the WinPT version. On success @r_dh is replaced |
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with the modified data. |
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Return value: 0 on success. */ |
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static gpgme_error_t |
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gpg_data_change_version (gpgme_data_t *r_dh) |
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{ |
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gpgme_error_t err; |
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gpgme_data_t mdh; |
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const char *s; |
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char line[BUFSIZE+32]; |
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int n; |
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|
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if (!r_dh) |
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return gpg_error (GPG_ERR_INV_ARG); |
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|
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err = gpgme_data_new (&mdh); |
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if (err) |
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return err; |
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|
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/* Pattern we search for. */ |
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s = "Version: GnuPG"; |
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gpgme_data_rewind (*r_dh); |
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while ((n=gpg_data_readline (*r_dh, line, BUFSIZE-1)) > 0) { |
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if (strlen (line) > strlen (s) && |
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!strncmp (line, s, strlen (s)) && |
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!stristr (line, "WinPT "PGM_VERSION)) { |
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/* Do not assume a \r\n sequence. */ |
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if (strstr (line, "\r\n")) |
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line[strlen (line) - 2] = '\0'; |
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if (strstr (line, "\n")) |
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line[strlen (line)-1] = '\0'; |
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strcat (line, " - WinPT "PGM_VERSION"\r\n"); |
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} |
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gpgme_data_write (mdh, line, strlen (line)); |
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} |
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|
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gpgme_data_write (mdh, "", 1); |
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gpgme_data_rewind (mdh); |
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gpgme_data_release (*r_dh); |
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*r_dh = mdh; |
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return err; |
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} |
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|
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/* Release a gpgme data object @dh and write the contents of |
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the object to the clipboard. If @chg_ver is set, modify the |
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Version: header and add WinPT information. */ |
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void |
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gpg_data_release_and_set_clipboard (gpgme_data_t dh, int chg_ver) |
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{ |
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gpgme_data_t in; |
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char *clip_text; |
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size_t n; |
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|
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if (!dh) |
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return; |
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|
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in = dh; |
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if (chg_ver) |
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gpg_data_change_version (&in); |
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|
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clip_text = gpgme_data_release_and_get_mem (in, &n); |
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if (clip_text && *clip_text) { |
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set_w32_clip_text (clip_text, n); |
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wipememory (clip_text, n); |
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gpgme_free (clip_text); |
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} |
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} |
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