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/* wptClipDecryptDlg.cpp - Clipboard decryption |
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* Copyright (C) 2000-2006 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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|
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#include "wptTypes.h" |
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#include "wptW32API.h" |
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#include "wptAgent.h" |
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#include "wptNLS.h" |
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#include "wptGPG.h" |
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#include "wptVersion.h" |
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#include "wptErrors.h" |
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#include "wptCommonCtl.h" |
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#include "wptContext.h" |
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#include "wptDlgs.h" |
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#include "wptKeylist.h" |
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#include "wptUTF8.h" |
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#include "resource.h" |
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|
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bool is_seckey_available (gpgme_recipient_t rset); |
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char* get_pka_status (gpgme_signature_t sig); |
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|
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|
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/* Return the primary user-ID of the key with the keyid @keyid. |
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Caller must free string. */ |
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char* |
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get_key_userid (const char *keyid) |
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{ |
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winpt_key_s key; |
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const char *fmt; |
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char *uid; |
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|
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memset (&key, 0, sizeof (key)); |
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if (winpt_get_pubkey (keyid, &key)) |
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return m_strdup (_("user ID not found")); |
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fmt = "\n \"%s\""; |
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uid = new char[strlen (key.ext->uids->uid) + strlen (fmt)+ 2]; |
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if (!uid) |
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BUG (NULL); |
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sprintf (uid, fmt, key.ext->uids->uid); |
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winpt_release_pubkey (&key); |
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return uid; |
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} |
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|
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|
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/* Decrypt the clipboard contents and on success |
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replace the data with the plaintext. |
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Return value: 0 on success. */ |
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gpgme_error_t |
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gpgme_op_clip_decrypt (gpgme_ctx_t ctx) |
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{ |
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gpgme_error_t err; |
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gpgme_data_t ciph = NULL; |
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gpgme_data_t plain = NULL; |
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|
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err = gpg_data_new_from_clipboard (&ciph, 0); |
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if (err) |
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return err; |
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|
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err = gpgme_data_new (&plain); |
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if (err) { |
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gpgme_data_release (ciph); |
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return err; |
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} |
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|
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err = gpgme_op_decrypt_verify (ctx, ciph, plain); |
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|
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gpg_data_release_and_set_clipboard (plain, 0); |
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gpgme_data_release (ciph); |
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return err; |
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} |
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|
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|
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/* Return humand readable ownertrust description for verification info. */ |
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const char* |
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verify_get_key_ownertrust (gpgme_validity_t key_ot, int *novalid) |
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{ |
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const char *s; |
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|
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if (key_ot == GPGME_VALIDITY_FULL || |
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key_ot == GPGME_VALIDITY_ULTIMATE) |
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s = _("Signature status: created with a fully trusted key"); |
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else if (key_ot == GPGME_VALIDITY_MARGINAL) |
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s = _("Signature status: created with a marginal trusted key"); |
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else if (key_ot == GPGME_VALIDITY_NEVER) { |
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if (novalid) *novalid = 1; |
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s = _("Signature status: created with an UNTRUSTED key"); |
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} |
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else |
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s = _("Signature status: created with an undefined trusted key"); |
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return s; |
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} |
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|
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|
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/* Return a signature specific header and footer for the clipboard. */ |
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void |
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verify_get_clip_info (gpgme_signature_t sig, char **r_header, char **r_footer) |
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{ |
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struct winpt_key_s pk; |
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const char *head = "***** BEGIN PGP SIGNED TEXT *****\r\n" |
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"***** Signature made %s using key ID 0x%s\r\n" |
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"***** %s\r\n" |
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"***** \"%s\" from %s\r\n"; |
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const char *foot = "***** END PGP SIGNED TEXT *****"; |
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const char *s, *made, *ot; |
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char *p; |
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|
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if (winpt_get_pubkey (sig->fpr, &pk)) |
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BUG (0); |
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ot = verify_get_key_ownertrust (pk.ctx->owner_trust, NULL); |
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made = strtimestamp (sig->timestamp); |
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s = get_gpg_sigstat (sig->summary); |
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p = new char[strlen (head) + strlen (s) + strlen (made) + |
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strlen (sig->fpr) + strlen (ot) + |
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strlen (pk.ext->uids->uid) + 1]; |
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if (!p) |
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BUG (0); |
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sprintf (p, head, made, get_keyid_from_fpr (sig->fpr), ot, s, pk.ext->uids->uid); |
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*r_header = p; |
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*r_footer = m_strdup (foot); |
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} |
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|
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|
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/* Show a human readable description of the given signature @sig. */ |
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void |
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verify_show_signature_state (gpgme_signature_t sig) |
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{ |
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winpt_key_s key; |
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const char *keyid, *uid; |
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const char *s; |
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char *pka_info = NULL; |
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int novalid = 0; |
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|
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if (!sig->fpr) |
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BUG (NULL); |
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|
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keyid = get_keyid_from_fpr (sig->fpr); |
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memset (&key, 0, sizeof (key)); |
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|
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if (!winpt_get_pubkey (keyid, &key)) { |
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s = verify_get_key_ownertrust (key.ctx->owner_trust, &novalid); |
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uid = key.ext->uids->uid; |
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} |
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else { |
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s = ""; |
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uid = _("user ID not found"); |
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} |
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|
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pka_info = get_pka_status (sig); |
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log_box (_("Decrypt Verify"), novalid? MB_WARN : MB_OK, |
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_("%s\n" |
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"%s\n" |
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"Signature made: %s\n" |
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"From \"%s\" using key ID 0x%s" |
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"%s %s\n%s"), |
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s, get_gpg_sigstat (sig->summary), |
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strtimestamp (sig->timestamp), |
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uid, keyid, |
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novalid? "\nPrimary key fingerprint: " : "", |
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novalid? get_key_fpr (key.ctx) : "", |
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pka_info? pka_info : "" |
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); |
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free_if_alloc (pka_info); |
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winpt_release_pubkey (&key); |
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} |
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|
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|
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/* Convenient function to provide clipboard decryption. |
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@hwnd is the parent window used for showing messsages. |
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Return value: 0 on success. */ |
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gpgme_error_t |
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clip_decrypt_dlg (HWND hwnd, int use_viewer) |
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{ |
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gpgme_error_t err; |
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gpgme_ctx_t ctx = NULL; |
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gpgme_decrypt_result_t res; |
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gpgme_verify_result_t sigres; |
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passphrase_cb_s pwd; |
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const char *s; |
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int pgp_type = 0; |
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|
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/* allow to verify data generated by 'gpg -a --sign foo' */ |
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if (fm_assume_onepass_sig (NULL) == 1) { |
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dialog_box_param (glob_hinst, (LPCSTR)IDD_WINPT_VERIFY, hwnd, |
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clip_verify_dlg_proc, 0, |
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_("Verify"), IDS_WINPT_VERIFY); |
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return 0; |
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} |
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|
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err = gpgme_new (&ctx); |
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if (err) |
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BUG (NULL); |
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set_gpg_passphrase_cb (&pwd, ctx, GPG_CMD_DECRYPT, hwnd, _("Decryption")); |
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gpg_get_recipients (NULL, &pwd.recipients); |
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|
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err = gpgme_op_clip_decrypt (ctx); |
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if (pwd.cancel) |
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goto leave; |
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if (gpgme_err_code (err) == GPG_ERR_BAD_PASSPHRASE) |
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agent_del_cache (pwd.keyid); |
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|
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res = gpgme_op_decrypt_result (ctx); |
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if (err && res->recipients && !is_seckey_available (res->recipients)) { |
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gpgme_recipient_t r = res->recipients; |
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char *u = get_key_userid (r->keyid+8); |
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log_box (_("Decryption"), MB_ERR, |
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_("Encrypted with %s key, ID %s.%s\n" |
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"Decryption failed: secret key not available."), |
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get_key_pubalgo (r->pubkey_algo), r->keyid+8, u); |
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free_if_alloc (u); |
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goto leave; |
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} |
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else if (res->unsupported_algorithm) { |
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log_box (_("Decryption"), MB_ERR, _("Unsupported algorithm: %s"), |
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res->unsupported_algorithm); |
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} |
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else if (err) { |
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gpg_clip_get_pgptype (&pgp_type); |
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if (gpgme_err_code (err) == GPG_ERR_NO_DATA && (pgp_type & PGP_MESSAGE)) |
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msg_box (hwnd, _("Broken OpenPGP message (maybe: quoted printable " |
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"character in armor)."), _("Decryption"), MB_INFO); |
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else |
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msg_box (hwnd, gpgme_strerror (err), _("Decryption"), MB_ERR); |
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goto leave; |
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} |
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|
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if (0) { /* XXX: Bad MDC */ |
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s = _("WARNING: encrypted message has been manipulated!\n" |
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"\n" |
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"Do *NOT* trust any text or data output from this file!\n" |
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"It is likely, the data was corrupted during the transport\n" |
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"but it might be also possible that this is part of an attack."); |
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msg_box (hwnd, s, _("*** IMPORTANT ***"), MB_INFO); |
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} |
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|
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show_msg (GetDesktopWindow (), 1500, _("GnuPG Status: Finished")); |
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|
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sigres = gpgme_op_verify_result (ctx); |
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if (sigres && sigres->signatures) { |
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if (!use_viewer) |
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verify_show_signature_state (sigres->signatures); |
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else |
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DialogBoxParam (glob_hinst, (LPCTSTR)IDD_WINPT_CLIPEDIT, |
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hwnd, clip_edit_dlg_proc, |
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(LPARAM)sigres->signatures); |
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} |
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|
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leave: |
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release_gpg_passphrase_cb (&pwd); |
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gpgme_release (ctx); |
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return err; |
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} |
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