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, 675 insertions, 0 deletions

diff --git a/libkdenetwork/gpgmepp/context.cpp b/libkdenetwork/gpgmepp/context.cpp
new file mode 100644
index 000000000..c0286fcbd
--- /dev/null
+++ b/libkdenetwork/gpgmepp/context.cpp
@@ -0,0 +1,675 @@
+/* context.cpp - wraps a gpgme key context
+   Copyright (C) 2003 Klarälvdalens Datakonsult AB
+
+   This file is part of GPGME++.
+
+   GPGME++ is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GPGME++; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.  */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <gpgmepp/context.h>
+#include <gpgmepp/eventloopinteractor.h>
+#include <gpgmepp/trustitem.h>
+#include <gpgmepp/keylistresult.h>
+#include <gpgmepp/keygenerationresult.h>
+#include <gpgmepp/importresult.h>
+#include <gpgmepp/decryptionresult.h>
+#include <gpgmepp/verificationresult.h>
+#include <gpgmepp/signingresult.h>
+#include <gpgmepp/encryptionresult.h>
+#include <gpgmepp/engineinfo.h>
+
+#include "callbacks.h"
+#include "data_p.h"
+#include "context_p.h"
+#include "util.h"
+
+#include <gpgme.h>
+#include <gpg-error.h>
+
+//#include <string>
+//using std::string;
+#ifndef NDEBUG
+#include <iostream>
+using std::cerr;
+using std::endl;
+#endif
+
+#include <cassert>
+
+namespace GpgME {
+
+  void initializeLibrary() {
+    gpgme_check_version( 0 );
+  }
+
+  const char * Error::source() const {
+    return gpgme_strsource( (gpgme_error_t)mErr );
+  }
+
+  const char * Error::asString() const {
+    return gpgme_strerror( (gpgme_error_t)mErr );
+  }
+
+  int Error::code() const {
+    return gpgme_err_code( mErr );
+  }
+
+  int Error::sourceID() const {
+    return gpgme_err_source( mErr );
+  }
+
+  bool Error::isCanceled() const {
+    return code() == GPG_ERR_CANCELED;
+  }
+
+  Context::Context( gpgme_ctx_t ctx ) {
+    d = new Private( ctx );
+  }
+
+  Context::~Context() {
+    delete d; d = 0;
+  }
+
+  Context * Context::createForProtocol( Protocol proto ) {
+    gpgme_ctx_t ctx = 0;
+    if ( gpgme_new ( &ctx ) != 0 )
+      return 0;
+
+    switch ( proto ) {
+    case OpenPGP:
+      if ( gpgme_set_protocol( ctx, GPGME_PROTOCOL_OpenPGP ) != 0 ) {
+	gpgme_release( ctx );
+	return 0;
+      }
+      break;
+    case CMS:
+      if ( gpgme_set_protocol( ctx, GPGME_PROTOCOL_CMS ) != 0 ) {
+	gpgme_release( ctx );
+	return 0;
+      }
+      break;
+    default:
+      return 0;
+    }
+
+    return new Context( ctx );
+  }
+
+  //
+  //
+  // Context attributes:
+  //
+  //
+
+  Context::Protocol Context::protocol() const {
+    gpgme_protocol_t p = gpgme_get_protocol( d->ctx );
+    switch ( p ) {
+    case GPGME_PROTOCOL_OpenPGP: return OpenPGP;
+    case GPGME_PROTOCOL_CMS:     return CMS;
+    default:                     return Unknown;
+    }
+  }
+
+
+  void Context::setArmor( bool useArmor ) {
+    gpgme_set_armor( d->ctx, int( useArmor ) );
+  }
+  bool Context::armor() const {
+    return gpgme_get_armor( d->ctx );
+  }
+
+  void Context::setTextMode( bool useTextMode ) {
+    gpgme_set_textmode( d->ctx, int( useTextMode ) );
+  }
+  bool Context::textMode() const {
+    return gpgme_get_textmode( d->ctx );
+  }
+
+  void Context::setIncludeCertificates( int which ) {
+    if ( which == DefaultCertificates ) {
+#ifdef HAVE_GPGME_INCLUDE_CERTS_DEFAULT
+      which = GPGME_INCLUDE_CERTS_DEFAULT;
+#else
+      which = 1;
+#endif
+    }
+    gpgme_set_include_certs( d->ctx, which );
+  }
+
+  int Context::includeCertificates() const {
+    return gpgme_get_include_certs( d->ctx );
+  }
+
+  void Context::setKeyListMode( unsigned int mode ) {
+    gpgme_set_keylist_mode( d->ctx, add_to_gpgme_keylist_mode_t( 0, mode ) );
+  }
+
+  void Context::addKeyListMode( unsigned int mode ) {
+    const unsigned int cur = gpgme_get_keylist_mode( d->ctx );
+    gpgme_set_keylist_mode( d->ctx, add_to_gpgme_keylist_mode_t( cur, mode ) );
+  }
+
+
+  unsigned int Context::keyListMode() const {
+    return convert_from_gpgme_keylist_mode_t( gpgme_get_keylist_mode( d->ctx ) );
+  }
+
+  void Context::setProgressProvider( ProgressProvider * provider ) {
+    gpgme_set_progress_cb( d->ctx, provider ? &progress_callback : 0, provider );
+  }
+  ProgressProvider * Context::progressProvider() const {
+    void * pp = 0;
+    gpgme_progress_cb_t pcb = &progress_callback;
+    gpgme_get_progress_cb( d->ctx, &pcb, &pp );
+    return static_cast<ProgressProvider*>( pp );
+  }
+
+  void Context::setPassphraseProvider( PassphraseProvider * provider ) {
+    gpgme_set_passphrase_cb( d->ctx, provider ? &passphrase_callback : 0, provider );
+  }
+
+  PassphraseProvider * Context::passphraseProvider() const {
+    void * pp = 0;
+    gpgme_passphrase_cb_t pcb = &passphrase_callback;
+    gpgme_get_passphrase_cb( d->ctx, &pcb, &pp );
+    return static_cast<PassphraseProvider*>( pp );
+  }
+
+  void Context::setManagedByEventLoopInteractor( bool manage ) {
+    if ( !EventLoopInteractor::instance() ) {
+#ifndef NDEBUG
+      cerr << "Context::setManagedByEventLoopInteractor(): "
+	      "You must create an instance of EventLoopInteractor "
+	      "before using anything that needs one." << endl;
+#endif
+      return;
+    }
+    if ( manage )
+      EventLoopInteractor::instance()->manage( this );
+    else
+      EventLoopInteractor::instance()->unmanage( this );
+  }
+  bool Context::managedByEventLoopInteractor() const {
+    return d->iocbs != 0;
+  }
+
+
+  void Context::installIOCallbacks( gpgme_io_cbs * iocbs ) {
+    if ( !iocbs ) {
+      uninstallIOCallbacks();
+      return;
+    }
+    gpgme_set_io_cbs( d->ctx, iocbs );
+    delete d->iocbs; d->iocbs = iocbs;
+  }
+
+  void Context::uninstallIOCallbacks() {
+    static gpgme_io_cbs noiocbs = { 0, 0, 0, 0, 0 };
+    // io.add == 0 means disable io callbacks:
+    gpgme_set_io_cbs( d->ctx, &noiocbs );
+    delete d->iocbs; d->iocbs = 0;
+  }
+
+  Error Context::setLocale( int cat, const char * val ) {
+    return d->lasterr = gpgme_set_locale( d->ctx, cat, val );
+  }
+
+  //
+  //
+  // Key Management
+  //
+  //
+
+  Error Context::startKeyListing( const char * pattern, bool secretOnly ) {
+    d->lastop = Private::KeyList;
+    return d->lasterr = gpgme_op_keylist_start( d->ctx, pattern, int( secretOnly ) );
+  }
+
+  Error Context::startKeyListing( const char * patterns[], bool secretOnly ) {
+    d->lastop = Private::KeyList;
+    return d->lasterr = gpgme_op_keylist_ext_start( d->ctx, patterns, int( secretOnly ), 0 );
+  }
+
+  Key Context::nextKey( GpgME::Error & e ) {
+    d->lastop = Private::KeyList;
+    gpgme_key_t key;
+    e = d->lasterr = gpgme_op_keylist_next( d->ctx, &key );
+    return Key( key, false, keyListMode() );
+  }
+
+  KeyListResult Context::endKeyListing() {
+    d->lasterr = gpgme_op_keylist_end( d->ctx );
+    return keyListResult();
+  }
+
+  KeyListResult Context::keyListResult() const {
+    return KeyListResult( d->ctx, d->lasterr );
+  }
+
+  Key Context::key( const char * fingerprint, GpgME::Error & e , bool secret /*, bool forceUpdate*/ ) {
+    d->lastop = Private::KeyList;
+    gpgme_key_t key;
+    e = d->lasterr = gpgme_get_key( d->ctx, fingerprint, &key, int( secret )/*, int( forceUpdate )*/ );
+    return Key( key, false, keyListMode() );
+  }
+
+  KeyGenerationResult Context::generateKey( const char * parameters, Data & pubKey ) {
+    d->lastop = Private::KeyGen;
+    Data::Private * dp = pubKey.impl();
+    d->lasterr = gpgme_op_genkey( d->ctx, parameters, dp ? dp->data : 0, 0 );
+    return KeyGenerationResult( d->ctx, d->lasterr );
+  }
+
+  Error Context::startKeyGeneration( const char * parameters, Data & pubKey ) {
+    d->lastop = Private::KeyGen;
+    Data::Private * dp = pubKey.impl();
+    return d->lasterr = gpgme_op_genkey_start( d->ctx, parameters, dp ? dp->data : 0, 0 );
+  }
+
+  KeyGenerationResult Context::keyGenerationResult() const {
+    if ( d->lastop & Private::KeyGen )
+      return KeyGenerationResult( d->ctx, d->lasterr );
+    else
+      return KeyGenerationResult();
+  }
+
+  Error Context::exportPublicKeys( const char * pattern, Data & keyData ) {
+    d->lastop = Private::Export;
+    Data::Private * dp = keyData.impl();
+    return d->lasterr = gpgme_op_export( d->ctx, pattern, 0, dp ? dp->data : 0 );
+  }
+
+  Error Context::exportPublicKeys( const char * patterns[], Data & keyData ) {
+    d->lastop = Private::Export;
+    Data::Private * dp = keyData.impl();
+    return d->lasterr = gpgme_op_export_ext( d->ctx, patterns, 0, dp ? dp->data : 0 );
+  }
+
+  Error Context::startPublicKeyExport( const char * pattern, Data & keyData ) {
+    d->lastop = Private::Export;
+    Data::Private * dp = keyData.impl();
+    return d->lasterr = gpgme_op_export_start( d->ctx, pattern, 0, dp ? dp->data : 0 );
+  }
+
+  Error Context::startPublicKeyExport( const char * patterns[], Data & keyData ) {
+    d->lastop = Private::Export;
+    Data::Private * dp = keyData.impl();
+    return d->lasterr = gpgme_op_export_ext_start( d->ctx, patterns, 0, dp ? dp->data : 0 );
+  }
+
+
+  ImportResult Context::importKeys( const Data & data ) {
+    d->lastop = Private::Import;
+    Data::Private * dp = data.impl();
+    d->lasterr = gpgme_op_import( d->ctx, dp ? dp->data : 0 );
+    return ImportResult( d->ctx, d->lasterr );
+  }
+
+  Error Context::startKeyImport( const Data & data ) {
+    d->lastop = Private::Import;
+    Data::Private * dp = data.impl();
+    return d->lasterr = gpgme_op_import_start( d->ctx, dp ? dp->data : 0 );
+  }
+
+  ImportResult Context::importResult() const {
+    if ( d->lastop & Private::Import )
+      return ImportResult( d->ctx, d->lasterr );
+    else
+      return ImportResult();
+  }
+
+  Error Context::deleteKey( const Key & key, bool allowSecretKeyDeletion ) {
+    d->lastop = Private::Delete;
+    return d->lasterr = gpgme_op_delete( d->ctx, key.impl(), int( allowSecretKeyDeletion ) );
+  }
+
+  Error Context::startKeyDeletion( const Key & key, bool allowSecretKeyDeletion ) {
+    d->lastop = Private::Delete;
+    return d->lasterr = gpgme_op_delete_start( d->ctx, key.impl(), int( allowSecretKeyDeletion ) );
+  }
+
+  Error Context::startTrustItemListing( const char * pattern, int maxLevel ) {
+    d->lastop = Private::TrustList;
+    return d->lasterr = gpgme_op_trustlist_start( d->ctx, pattern, maxLevel );
+  }
+
+  TrustItem Context::nextTrustItem( Error & e ) {
+    gpgme_trust_item_t ti = 0;
+    e = d->lasterr = gpgme_op_trustlist_next( d->ctx, &ti );
+    return ti;
+  }
+
+  Error Context::endTrustItemListing() {
+    return d->lasterr = gpgme_op_trustlist_end( d->ctx );
+  }
+
+  DecryptionResult Context::decrypt( const Data & cipherText, Data & plainText ) {
+    d->lastop = Private::Decrypt;
+    Data::Private * cdp = cipherText.impl();
+    Data::Private * pdp = plainText.impl();
+    d->lasterr = gpgme_op_decrypt( d->ctx, cdp ? cdp->data : 0, pdp ? pdp->data : 0 );
+    return DecryptionResult( d->ctx, d->lasterr );
+  }
+
+  Error Context::startDecryption( const Data & cipherText, Data & plainText ) {
+    d->lastop = Private::Decrypt;
+    Data::Private * cdp = cipherText.impl();
+    Data::Private * pdp = plainText.impl();
+    return d->lasterr = gpgme_op_decrypt_start( d->ctx, cdp ? cdp->data : 0, pdp ? pdp->data : 0 );
+  }
+
+  DecryptionResult Context::decryptionResult() const {
+    if ( d->lastop & Private::Decrypt )
+      return DecryptionResult( d->ctx, d->lasterr );
+    else
+      return DecryptionResult();
+  }
+
+
+
+  VerificationResult Context::verifyDetachedSignature( const Data & signature, const Data & signedText ) {
+    d->lastop = Private::Verify;
+    Data::Private * sdp = signature.impl();
+    Data::Private * tdp = signedText.impl();
+    d->lasterr = gpgme_op_verify( d->ctx, sdp ? sdp->data : 0, tdp ? tdp->data : 0, 0 );
+    return VerificationResult( d->ctx, d->lasterr );
+  }
+
+  VerificationResult Context::verifyOpaqueSignature( const Data & signedData, Data & plainText ) {
+    d->lastop = Private::Verify;
+    Data::Private * sdp = signedData.impl();
+    Data::Private * pdp = plainText.impl();
+    d->lasterr = gpgme_op_verify( d->ctx, sdp ? sdp->data : 0, 0, pdp ? pdp->data : 0 );
+    return VerificationResult( d->ctx, d->lasterr );
+  }
+
+  Error Context::startDetachedSignatureVerification( const Data & signature, const Data & signedText ) {
+    d->lastop = Private::Verify;
+    Data::Private * sdp = signature.impl();
+    Data::Private * tdp = signedText.impl();
+    return d->lasterr = gpgme_op_verify_start( d->ctx, sdp ? sdp->data : 0, tdp ? tdp->data : 0, 0 );
+  }
+
+  Error Context::startOpaqueSignatureVerification( const Data & signedData, Data & plainText ) {
+    d->lastop = Private::Verify;
+    Data::Private * sdp = signedData.impl();
+    Data::Private * pdp = plainText.impl();
+    return d->lasterr = gpgme_op_verify_start( d->ctx, sdp ? sdp->data : 0, 0, pdp ? pdp->data : 0 );
+  }
+
+  VerificationResult Context::verificationResult() const {
+    if ( d->lastop & Private::Verify )
+      return VerificationResult( d->ctx, d->lasterr );
+    else
+      return VerificationResult();
+  }
+
+
+  std::pair<DecryptionResult,VerificationResult> Context::decryptAndVerify( const Data & cipherText, Data & plainText ) {
+    d->lastop = Private::DecryptAndVerify;
+    Data::Private * cdp = cipherText.impl();
+    Data::Private * pdp = plainText.impl();
+    d->lasterr = gpgme_op_decrypt_verify( d->ctx, cdp ? cdp->data : 0, pdp ? pdp->data : 0 );
+    return std::make_pair( DecryptionResult( d->ctx, d->lasterr ),
+			   VerificationResult( d->ctx, d->lasterr ) );
+  }
+
+  Error Context::startCombinedDecryptionAndVerification( const Data & cipherText, Data & plainText ) {
+    d->lastop = Private::DecryptAndVerify;
+    Data::Private * cdp = cipherText.impl();
+    Data::Private * pdp = plainText.impl();
+    return d->lasterr = gpgme_op_decrypt_verify_start( d->ctx, cdp ? cdp->data : 0, pdp ? pdp->data : 0 );
+  }
+
+#ifdef HAVE_GPGME_OP_GETAUDITLOG
+  unsigned int to_auditlog_flags( unsigned int flags ) {
+      unsigned int result = 0;
+      if ( flags & Context::HtmlAuditLog )
+          result |= GPGME_AUDITLOG_HTML;
+      if ( flags & Context::AuditLogWithHelp )
+          result |= GPGME_AUDITLOG_WITH_HELP;
+      return result;
+  }
+#endif // HAVE_GPGME_OP_GETAUDITLOG
+
+
+  Error Context::startGetAuditLog( Data & output, unsigned int flags ) {
+    d->lastop = Private::GetAuditLog;
+#ifdef HAVE_GPGME_OP_GETAUDITLOG
+    Data::Private * const odp = output.impl();
+    return Error( d->lasterr = gpgme_op_getauditlog_start( d->ctx, odp ? odp->data : 0, to_auditlog_flags( flags ) ) );
+#else
+    (void)output; (void)flags;
+    return Error( d->lasterr = gpg_error( GPG_ERR_NOT_IMPLEMENTED ) );
+#endif
+  }
+
+  Error Context::getAuditLog( Data & output, unsigned int flags ) {
+    d->lastop = Private::GetAuditLog;
+#ifdef HAVE_GPGME_OP_GETAUDITLOG
+    Data::Private * const odp = output.impl();
+    return Error( d->lasterr = gpgme_op_getauditlog( d->ctx, odp ? odp->data : 0, to_auditlog_flags( flags ) ) );
+#else
+    (void)output; (void)flags;
+    return Error( d->lasterr = gpg_error( GPG_ERR_NOT_IMPLEMENTED ) );
+#endif
+  }
+
+  void Context::clearSigningKeys() {
+    gpgme_signers_clear( d->ctx );
+  }
+
+  Error Context::addSigningKey( const Key & key ) {
+    return d->lasterr = gpgme_signers_add( d->ctx, key.impl() );
+  }
+
+  Key Context::signingKey( unsigned int idx ) const {
+    gpgme_key_t key = gpgme_signers_enum( d->ctx, idx );
+    return Key( key, false, keyListMode() );
+  }
+
+
+  static gpgme_sig_mode_t sigmode2sigmode( Context::SignatureMode mode ) {
+    switch ( mode ) {
+    default:
+    case Context::Normal:      return GPGME_SIG_MODE_NORMAL;
+    case Context::Detached:    return GPGME_SIG_MODE_DETACH;
+    case Context::Clearsigned: return GPGME_SIG_MODE_CLEAR;
+    }
+  }
+
+  SigningResult Context::sign( const Data & plainText, Data & signature, SignatureMode mode ) {
+    d->lastop = Private::Sign;
+    Data::Private * pdp = plainText.impl();
+    Data::Private * sdp = signature.impl();
+    d->lasterr = gpgme_op_sign( d->ctx, pdp ? pdp->data : 0, sdp ? sdp->data : 0, sigmode2sigmode( mode ) );
+    return SigningResult( d->ctx, d->lasterr );
+  }
+
+
+  Error Context::startSigning( const Data & plainText, Data & signature, SignatureMode mode ) {
+    d->lastop = Private::Sign;
+    Data::Private * pdp = plainText.impl();
+    Data::Private * sdp = signature.impl();
+    return d->lasterr = gpgme_op_sign_start( d->ctx, pdp ? pdp->data : 0, sdp ? sdp->data : 0, sigmode2sigmode( mode ) );
+  }
+
+  SigningResult Context::signingResult() const {
+    if ( d->lastop & Private::Sign )
+      return SigningResult( d->ctx, d->lasterr );
+    else
+      return SigningResult();
+  }
+
+
+  EncryptionResult Context::encrypt( const std::vector<Key> & recipients, const Data & plainText, Data & cipherText, EncryptionFlags flags ) {
+    d->lastop = Private::Encrypt;
+    Data::Private * pdp = plainText.impl();
+    Data::Private * cdp = cipherText.impl();
+    gpgme_key_t * keys = new gpgme_key_t[ recipients.size() + 1 ];
+    gpgme_key_t * keys_it = keys;
+    for ( std::vector<Key>::const_iterator it = recipients.begin() ; it != recipients.end() ; ++it )
+      if ( it->impl() )
+	*keys_it++ = it->impl();
+    *keys_it++ = 0;
+    d->lasterr = gpgme_op_encrypt( d->ctx, keys,
+				   flags & AlwaysTrust ? GPGME_ENCRYPT_ALWAYS_TRUST : (gpgme_encrypt_flags_t)0,
+				   pdp ? pdp->data : 0, cdp ? cdp->data : 0 );
+    delete[] keys;
+    return EncryptionResult( d->ctx, d->lasterr );
+  }
+
+  Error Context::encryptSymmetrically( const Data & plainText, Data & cipherText ) {
+    d->lastop = Private::Encrypt;
+    Data::Private * pdp = plainText.impl();
+    Data::Private * cdp = cipherText.impl();
+    return d->lasterr = gpgme_op_encrypt( d->ctx, 0, (gpgme_encrypt_flags_t)0,
+					  pdp ? pdp->data : 0, cdp ? cdp->data : 0 );
+  }
+
+  Error Context::startEncryption( const std::vector<Key> & recipients, const Data & plainText, Data & cipherText, EncryptionFlags flags ) {
+    d->lastop = Private::Encrypt;
+    Data::Private * pdp = plainText.impl();
+    Data::Private * cdp = cipherText.impl();
+    gpgme_key_t * keys = new gpgme_key_t[ recipients.size() + 1 ];
+    gpgme_key_t * keys_it = keys;
+    for ( std::vector<Key>::const_iterator it = recipients.begin() ; it != recipients.end() ; ++it )
+      if ( it->impl() )
+	*keys_it++ = it->impl();
+    *keys_it++ = 0;
+    d->lasterr = gpgme_op_encrypt_start( d->ctx, keys,
+					 flags & AlwaysTrust ? GPGME_ENCRYPT_ALWAYS_TRUST : (gpgme_encrypt_flags_t)0,
+					 pdp ? pdp->data : 0, cdp ? cdp->data : 0 );
+    delete[] keys;
+    return d->lasterr;
+  }
+
+  EncryptionResult Context::encryptionResult() const {
+    if ( d->lastop & Private::Encrypt )
+      return EncryptionResult( d->ctx, d->lasterr );
+    else
+      return EncryptionResult();
+  }
+
+  std::pair<SigningResult,EncryptionResult> Context::signAndEncrypt( const std::vector<Key> & recipients, const Data & plainText, Data & cipherText, EncryptionFlags flags ) {
+    d->lastop = Private::SignAndEncrypt;
+    Data::Private * pdp = plainText.impl();
+    Data::Private * cdp = cipherText.impl();
+    gpgme_key_t * keys = new gpgme_key_t[ recipients.size() + 1 ];
+    gpgme_key_t * keys_it = keys;
+    for ( std::vector<Key>::const_iterator it = recipients.begin() ; it != recipients.end() ; ++it )
+      if ( it->impl() )
+	*keys_it++ = it->impl();
+    *keys_it++ = 0;
+    d->lasterr = gpgme_op_encrypt_sign( d->ctx, keys,
+					flags & AlwaysTrust ? GPGME_ENCRYPT_ALWAYS_TRUST : (gpgme_encrypt_flags_t)0,
+					pdp ? pdp->data : 0, cdp ? cdp->data : 0 );
+    delete[] keys;
+    return std::make_pair( SigningResult( d->ctx, d->lasterr ),
+			   EncryptionResult( d->ctx, d->lasterr ) );
+  }
+
+  Error Context::startCombinedSigningAndEncryption( const std::vector<Key> & recipients, const Data & plainText, Data & cipherText, EncryptionFlags flags ) {
+    d->lastop = Private::SignAndEncrypt;
+    Data::Private * pdp = plainText.impl();
+    Data::Private * cdp = cipherText.impl();
+    gpgme_key_t * keys = new gpgme_key_t[ recipients.size() + 1 ];
+    gpgme_key_t * keys_it = keys;
+    for ( std::vector<Key>::const_iterator it = recipients.begin() ; it != recipients.end() ; ++it )
+      if ( it->impl() )
+	*keys_it++ = it->impl();
+    *keys_it++ = 0;
+    d->lasterr = gpgme_op_encrypt_sign_start( d->ctx, keys,
+					      flags & AlwaysTrust ? GPGME_ENCRYPT_ALWAYS_TRUST : (gpgme_encrypt_flags_t)0,
+					      pdp ? pdp->data : 0, cdp ? cdp->data : 0 );
+    delete[] keys;
+    return d->lasterr;
+  }
+
+
+  Error Context::cancelPendingOperation() {
+#ifdef HAVE_GPGME_CANCEL
+    return gpgme_cancel( d->ctx );
+#else
+    return 0;
+#endif
+  }
+
+  bool Context::poll() {
+    gpgme_error_t e = GPG_ERR_NO_ERROR;
+    const bool finished = gpgme_wait( d->ctx, &e, 0 );
+    if ( finished )
+      d->lasterr = e;
+    return finished;
+  }
+
+  Error Context::wait() {
+    gpgme_error_t e = GPG_ERR_NO_ERROR;
+    gpgme_wait( d->ctx, &e, 1 );
+    return d->lasterr = e;
+  }
+
+  Error Context::lastError() const {
+    return d->lasterr;
+  }
+
+
+} // namespace GpgME
+
+GpgME::Error GpgME::setDefaultLocale( int cat, const char * val ) {
+  return gpgme_set_locale( 0, cat, val );
+}
+
+GpgME::EngineInfo GpgME::engineInfo( Context::Protocol proto ) {
+  gpgme_engine_info_t ei = 0;
+  if ( gpgme_get_engine_info( &ei ) )
+    return EngineInfo();
+
+  gpgme_protocol_t p = proto == Context::CMS ? GPGME_PROTOCOL_CMS : GPGME_PROTOCOL_OpenPGP ;
+
+  for ( gpgme_engine_info_t i = ei ; i ; i = i->next )
+    if ( i->protocol == p )
+      return EngineInfo( i );
+
+  return EngineInfo();
+}
+
+GpgME::Error GpgME::checkEngine( Context::Protocol proto ) {
+  gpgme_protocol_t p = proto == Context::CMS ? GPGME_PROTOCOL_CMS : GPGME_PROTOCOL_OpenPGP ;
+
+  return gpgme_engine_check_version( p );
+}
+
+static const unsigned long supported_features = 0
+#ifdef HAVE_GPGME_KEYLIST_MODE_VALIDATE
+    | GpgME::ValidatingKeylistModeFeature
+#endif
+#ifdef HAVE_GPGME_CANCEL
+    | GpgME::CancelOperationFeature
+#endif
+#ifdef HAVE_GPGME_WRONG_KEY_USAGE
+    | GpgME::WrongKeyUsageFeature
+#endif
+#ifdef HAVE_GPGME_OP_GETAUDITLOG
+    | GpgME::AuditLogFeature
+#endif
+    ;
+
+bool GpgME::hasFeature( unsigned long features ) {
+    return features == ( features & supported_features );
+}