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Diffstat (limited to 'context.cpp')
| -rw-r--r-- | context.cpp | 671 |
1 files changed, 0 insertions, 671 deletions
diff --git a/context.cpp b/context.cpp deleted file mode 100644 index 654b928..0000000 --- a/context.cpp +++ /dev/null @@ -1,671 +0,0 @@ -/* - * context.cpp - * - * Copyright 2008 gpg4usb-team <[email protected]> - * - * This file is part of gpg4usb. - * - * Gpg4usb 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 3 of the License, or - * (at your option) any later version. - * - * Gpg4usb 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 gpg4usb. If not, see <http://www.gnu.org/licenses/> - */ - -#include "context.h" - -#ifdef _WIN32 -#include <windows.h> -#include <unistd.h> /* contains read/write */ -#endif - - -namespace GpgME -{ - -/** Constructor - * Set up gpgme-context, set paths to app-run path - */ -Context::Context() -{ - - /** get application path */ - QString appPath = qApp->applicationDirPath(); - - /** The function `gpgme_check_version' must be called before any other - * function in the library, because it initializes the thread support - * subsystem in GPGME. (from the info page) */ - gpgme_check_version(NULL); - - // TODO: Set gpgme_language to config - // http://lavica.fesb.hr/cgi-bin/info2html?%28gpgme%29Locale - setlocale(LC_ALL, ""); - /** set locale, because tests do also */ - gpgme_set_locale(NULL, LC_CTYPE, setlocale(LC_CTYPE, NULL)); - //qDebug() << "Locale set to" << LC_CTYPE << " - " << setlocale(LC_CTYPE, NULL); -#ifndef _WIN32 - gpgme_set_locale(NULL, LC_MESSAGES, setlocale(LC_MESSAGES, NULL)); -#endif - - err = gpgme_new(&mCtx); - checkErr(err); - /** here come the settings, instead of /usr/bin/gpg - * a executable in the same path as app is used. - * also lin/win must be checked, for calling gpg.exe if needed - */ -#ifdef _WIN32 - QString gpgBin = appPath + "/bin/gpg.exe"; -#else - QString gpgBin = appPath + "/bin/gpg"; -#endif - QString gpgKeys = appPath + "/keydb"; - /* err = gpgme_ctx_set_engine_info(mCtx, GPGME_PROTOCOL_OpenPGP, - gpgBin.toUtf8().constData(), - gpgKeys.toUtf8().constData());*/ - err = gpgme_ctx_set_engine_info(mCtx, GPGME_PROTOCOL_OpenPGP, - gpgBin.toLocal8Bit().constData(), - gpgKeys.toLocal8Bit().constData()); - checkErr(err); - - - /** Setting the output type must be done at the beginning */ - /** think this means ascii-armor --> ? */ - gpgme_set_armor(mCtx, 1); - /** passphrase-callback */ - gpgme_set_passphrase_cb(mCtx, passphraseCb, this); - - /** check if app is called with -d from command line */ - if (qApp->arguments().contains("-d")) { - qDebug() << "gpgme_data_t debug on"; - debug = true; - } else { - debug = false; - } - -} - -/** Destructor - * Release gpgme-context - */ -Context::~Context() -{ - if (mCtx) gpgme_release(mCtx); - mCtx = 0; -} - -/** Import Key from QByteArray - * - */ -void Context::importKey(QByteArray inBuffer) -{ - err = gpgme_data_new_from_mem(&in, inBuffer.data(), inBuffer.size(), 1); - checkErr(err); - err = gpgme_op_import(mCtx, in); - checkErr(err); - gpgme_data_release(in); - emit keyDBChanged(); -} - -/** Generate New Key with values params - * - */ -void Context::generateKey(QString *params) -{ - err = gpgme_op_genkey(mCtx, params->toAscii().data(), NULL, NULL); - checkErr(err); - emit keyDBChanged(); -} - -/** Export Key to QByteArray - * - */ -bool Context::exportKeys(QStringList *uidList, QByteArray *outBuffer) -{ - size_t read_bytes; - gpgme_data_t out = 0; - outBuffer->resize(0); - - if (uidList->count() == 0) { - QMessageBox::critical(0, "Export Keys Error", "No Keys Selected"); - return false; - } - - for (int i = 0; i < uidList->count(); i++) { - err = gpgme_data_new(&out); - checkErr(err); - - err = gpgme_op_export(mCtx, uidList->at(i).toAscii().constData(), 0, out); - checkErr(err); - - read_bytes = gpgme_data_seek(out, 0, SEEK_END); - - err = readToBuffer(out, outBuffer); - checkErr(err); - gpgme_data_release(out); - } - return true; -} - -gpgme_key_t Context::getKeyDetails(QString uid) -{ - gpgme_key_t key; - - // try secret - gpgme_get_key(mCtx, uid.toAscii().constData(), &key, 1); - // ok, its a public key - if (!key) { - gpgme_get_key(mCtx, uid.toAscii().constData(), &key, 0); - } - return key; -} - -/** List all availabe Keys (VERY much like kgpgme) - */ -GpgKeyList Context::listKeys() -{ - gpgme_error_t err; - gpgme_key_t key; - - GpgKeyList keys; - //TODO dont run the loop more often than necessary - // list all keys ( the 0 is for all ) - err = gpgme_op_keylist_start(mCtx, NULL, 0); - checkErr(err); - while (!(err = gpgme_op_keylist_next(mCtx, &key))) { - GpgKey gpgkey; - - if (!key->subkeys) - continue; - - gpgkey.id = key->subkeys->keyid; - gpgkey.fpr = key->subkeys->fpr; - gpgkey.expired = (key->expired != 0); - - if (key->uids) { - gpgkey.name = key->uids->name; - gpgkey.email = key->uids->email; - } - keys.append(gpgkey); - gpgme_key_unref(key); - } - gpgme_op_keylist_end(mCtx); - - // list only private keys ( the 1 does ) - gpgme_op_keylist_start(mCtx, NULL, 1); - while (!(err = gpgme_op_keylist_next(mCtx, &key))) { - if (!key->subkeys) - continue; - // iterate keys, mark privates - GpgKeyList::iterator it = keys.begin(); - while (it != keys.end()) { - if (key->subkeys->keyid == it->id.toStdString()) - it->privkey = true; - it++; - } - - gpgme_key_unref(key); - } - gpgme_op_keylist_end(mCtx); - - return keys; -} - -/** Delete keys - */ - -void Context::deleteKeys(QStringList *uidList) -{ - QString tmp; - gpgme_key_t key; - - foreach(tmp, *uidList) { - gpgme_op_keylist_start(mCtx, tmp.toAscii().constData(), 0); - gpgme_op_keylist_next(mCtx, &key); - gpgme_op_keylist_end(mCtx); - gpgme_op_delete(mCtx, key, 1); - } - emit keyDBChanged(); -} - -/** Encrypt inBuffer for reciepients-uids, write - * result to outBuffer - */ -bool Context::encrypt(QStringList *uidList, const QByteArray &inBuffer, QByteArray *outBuffer) -{ - - gpgme_data_t in = 0, out = 0; - outBuffer->resize(0); - - if (uidList->count() == 0) { - QMessageBox::critical(0, tr("No Key Selected"), tr("No Key Selected")); - return false; - } - - //gpgme_encrypt_result_t e_result; - gpgme_key_t recipients[uidList->count()+1]; - - /* get key for user */ - for (int i = 0; i < uidList->count(); i++) { - // the last 0 is for public keys, 1 would return private keys - gpgme_op_keylist_start(mCtx, uidList->at(i).toAscii().constData(), 0); - gpgme_op_keylist_next(mCtx, &recipients[i]); - gpgme_op_keylist_end(mCtx); - } - //Last entry in array has to be NULL - recipients[uidList->count()] = NULL; - - //If the last parameter isnt 0, a private copy of data is made - if (mCtx) { - err = gpgme_data_new_from_mem(&in, inBuffer.data(), inBuffer.size(), 1); - checkErr(err); - if (!err) { - err = gpgme_data_new(&out); - checkErr(err); - if (!err) { - err = gpgme_op_encrypt(mCtx, recipients, GPGME_ENCRYPT_ALWAYS_TRUST, in, out); - checkErr(err); - if (!err) { - err = readToBuffer(out, outBuffer); - checkErr(err); - } - } - } - } - /* unref all keys */ - for (int i = 0; i <= uidList->count(); i++) { - gpgme_key_unref(recipients[i]); - } - if (in) { - gpgme_data_release(in); - } - if (out) { - gpgme_data_release(out); - } - return (err == GPG_ERR_NO_ERROR); -} - -/** Decrypt QByteAarray, return QByteArray - * mainly from http://basket.kde.org/ (kgpgme.cpp) - */ -bool Context::decrypt(const QByteArray &inBuffer, QByteArray *outBuffer) -{ - gpgme_data_t in = 0, out = 0; - gpgme_decrypt_result_t result = 0; - - outBuffer->resize(0); - if (mCtx) { - err = gpgme_data_new_from_mem(&in, inBuffer.data(), inBuffer.size(), 1); - checkErr(err); - if (!err) { - err = gpgme_data_new(&out); - checkErr(err); - if (!err) { - err = gpgme_op_decrypt(mCtx, in, out); - checkErr(err); - if (!err) { - result = gpgme_op_decrypt_result(mCtx); - if (result->unsupported_algorithm) { - QMessageBox::critical(0, tr("Unsupported algorithm"), result->unsupported_algorithm); - } else { - err = readToBuffer(out, outBuffer); - checkErr(err); - } - } - } - } - } - if (err != GPG_ERR_NO_ERROR && err != GPG_ERR_CANCELED) { - QMessageBox::critical(0, tr("Error decrypting:"), gpgme_strerror(err)); - return false; - } - - if (! settings.value("general/rememberPassword").toBool()) { - clearPasswordCache(); - } - - if (in) { - gpgme_data_release(in); - } - if (out) { - gpgme_data_release(out); - } - return (err == GPG_ERR_NO_ERROR); -} - -/** Read gpgme-Data to QByteArray - * mainly from http://basket.kde.org/ (kgpgme.cpp) - */ -#define BUF_SIZE (32 * 1024) -gpgme_error_t Context::readToBuffer(gpgme_data_t in, QByteArray *outBuffer) -{ - int ret; - gpgme_error_t err = GPG_ERR_NO_ERROR; - - ret = gpgme_data_seek(in, 0, SEEK_SET); - if (ret) { - err = gpgme_err_code_from_errno(errno); - checkErr(err, "failed dataseek in readToBuffer"); - } else { - char *buf = new char[BUF_SIZE + 2]; - - if (buf) { - while ((ret = gpgme_data_read(in, buf, BUF_SIZE)) > 0) { - uint size = outBuffer->size(); - outBuffer->resize(size + ret); - memcpy(outBuffer->data() + size, buf, ret); - } - if (ret < 0) { - err = gpgme_err_code_from_errno(errno); - checkErr(err, "failed data_read in readToBuffer"); - } - delete[] buf; - } - } - return err; -} - -/** The Passphrase window, if not provided by env-Var GPG_AGENT_INFO - * originally copied from http://basket.kde.org/ (kgpgme.cpp), but modified - */ -gpgme_error_t Context::passphraseCb(void *hook, const char *uid_hint, - const char *passphrase_info, - int last_was_bad, int fd) -{ - Context *gpg = static_cast<Context*>(hook); - return gpg->passphrase(uid_hint, passphrase_info, last_was_bad, fd); -} - -gpgme_error_t Context::passphrase(const char *uid_hint, - const char * /*passphrase_info*/, - int last_was_bad, int fd) -{ - gpgme_error_t returnValue = GPG_ERR_CANCELED; - QString passwordDialogMessage; - QString gpgHint = uid_hint; - bool result; - - if (last_was_bad) { - passwordDialogMessage += "<i>"+tr("Wrong password")+".</i><br><br>\n\n"; - clearPasswordCache(); - } - - /** if uid provided */ - if (!gpgHint.isEmpty()) { - // remove UID, leave only username & email - gpgHint.remove(0, gpgHint.indexOf(" ")); - passwordDialogMessage += "<b>Enter Password for</b><br>\n" + gpgHint + "\n"; - } - - if (mPasswordCache.isEmpty()) { - QString password = QInputDialog::getText(0, tr("Enter Password"), - passwordDialogMessage, QLineEdit::Password, - "", &result, Qt::Window); - - if (result) mPasswordCache = password.toAscii(); - } else { - result = true; - } - - if (result) { - -#ifndef _WIN32 - if (write(fd, mPasswordCache.data(), mPasswordCache.length()) == -1) { - qDebug() << "something is terribly broken"; - } -#else - DWORD written; - WriteFile((HANDLE) fd, mPasswordCache.data(), mPasswordCache.length(), &written, 0); -#endif - - returnValue = 0; - } - -#ifndef _WIN32 - if (write(fd, "\n", 1) == -1) { - qDebug() << "something is terribly broken"; - } -#else - DWORD written; - WriteFile((HANDLE) fd, "\n", 1, &written, 0); -#endif - - return returnValue; -} - -/** also from kgpgme.cpp, seems to clear password from mem */ -void Context::clearPasswordCache() -{ - if (mPasswordCache.size() > 0) { - mPasswordCache.fill('\0'); - mPasswordCache.truncate(0); - } -} - -// error-handling -int Context::checkErr(gpgme_error_t err, QString comment) const -{ - //if (err != GPG_ERR_NO_ERROR && err != GPG_ERR_CANCELED) { - if (err != GPG_ERR_NO_ERROR) { - qDebug() << "[Error " << comment << "] Source: " << gpgme_strsource(err) << " String: " << gpgme_strerror(err); - } - return err; -} - -int Context::checkErr(gpgme_error_t err) const -{ - //if (err != GPG_ERR_NO_ERROR && err != GPG_ERR_CANCELED) { - if (err != GPG_ERR_NO_ERROR) { - qDebug() << "[Error] Source: " << gpgme_strsource(err) << " String: " << gpgme_strerror(err); - } - return err; -} - - -/** export private key, TODO errohandling, e.g. like in seahorse (seahorse-gpg-op.c) **/ - -void Context::exportSecretKey(QString uid, QByteArray *outBuffer) -{ - // export private key to outBuffer - QStringList arguments; - arguments << "--armor" << "--export-secret-key" << uid; - QByteArray *err = new QByteArray(); - executeGpgCommand(arguments, outBuffer, err); - - // append public key to outBuffer - QByteArray *pubKey = new QByteArray(); - QStringList keyList; - keyList.append(uid); - exportKeys(&keyList,pubKey); - outBuffer->append(*pubKey); -} - -/** return type should be gpgme_error_t*/ -void Context::executeGpgCommand(QStringList arguments, QByteArray *stdOut, QByteArray *stdErr) -{ - gpgme_engine_info_t engine = gpgme_ctx_get_engine_info(mCtx); - - QStringList args; - args << "--homedir" << engine->home_dir << "--batch" << arguments; - - QProcess gpg; - gpg.start(engine->file_name, args); - gpg.waitForFinished(); - - *stdOut = gpg.readAllStandardOutput(); - *stdErr = gpg.readAllStandardError(); -} - -/*** - * TODO: return type should contain: - * -> list of sigs - * -> valid - * -> errors - */ -gpgme_signature_t Context::verify(QByteArray inBuffer) { - - int error=0; - gpgme_data_t in; - gpgme_error_t err; - gpgme_signature_t sign; - gpgme_verify_result_t result; - - err = gpgme_data_new_from_mem(&in, inBuffer.data(), inBuffer.size(), 1); - checkErr(err); - - err = gpgme_op_verify (mCtx, in, NULL, in); - error = checkErr(err); - - if (error != 0) { - return NULL; - } - - result = gpgme_op_verify_result (mCtx); - sign = result->signatures; - return sign; -} - -/*** - * return type should contain: - * -> list of sigs - * -> valid - * -> decrypted message - */ -//void Context::decryptVerify(QByteArray in) { - -/* gpgme_error_t err; - gpgme_data_t in, out; - - gpgme_decrypt_result_t decrypt_result; - gpgme_verify_result_t verify_result; - - err = gpgme_op_decrypt_verify (mCtx, in, out); - decrypt_result = gpgme_op_decrypt_result (mCtx); - - verify_result = gpgme_op_verify_result (mCtx); - */ -//} - -bool Context::sign(QStringList *uidList, const QByteArray &inBuffer, QByteArray *outBuffer ) { - - gpgme_error_t err; - gpgme_data_t in, out; - gpgme_sign_result_t result; - - if (uidList->count() == 0) { - QMessageBox::critical(0, tr("Key Selection"), tr("No Private Key Selected")); - return false; - } - - // at start or end? - gpgme_signers_clear(mCtx); - - //gpgme_encrypt_result_t e_result; - gpgme_key_t signers[uidList->count()+1]; - - - // TODO: do we really need array? adding one key in loop should be ok - for (int i = 0; i < uidList->count(); i++) { - // the last 0 is for public keys, 1 would return private keys - gpgme_op_keylist_start(mCtx, uidList->at(i).toAscii().constData(), 0); - gpgme_op_keylist_next(mCtx, &signers[i]); - gpgme_op_keylist_end(mCtx); - - err = gpgme_signers_add (mCtx, signers[i]); - checkErr(err); - } - - err = gpgme_data_new_from_mem(&in, inBuffer.data(), inBuffer.size(), 1); - checkErr(err); - err = gpgme_data_new (&out); - checkErr(err); - - /* - `GPGME_SIG_MODE_NORMAL' - A normal signature is made, the output includes the plaintext - and the signature. - - `GPGME_SIG_MODE_DETACH' - A detached signature is made. - - `GPGME_SIG_MODE_CLEAR' - A clear text signature is made. The ASCII armor and text - mode settings of the context are ignored. - */ - - err = gpgme_op_sign (mCtx, in, out, GPGME_SIG_MODE_CLEAR); - checkErr (err); - - if (err == GPG_ERR_CANCELED) { - return false; - } - - if (err != GPG_ERR_NO_ERROR) { - QMessageBox::critical(0, tr("Error signing:"), gpgme_strerror(err)); - return false; - } - - result = gpgme_op_sign_result (mCtx); - err = readToBuffer(out, outBuffer); - checkErr (err); - - gpgme_data_release(in); - gpgme_data_release(out); - - return (err == GPG_ERR_NO_ERROR); -} - -/* - * if there is no '\n' before the PGP-Begin-Block, but for example a whitespace, - * GPGME doesn't recognise the Message as encrypted. This function adds '\n' - * before the PGP-Begin-Block, if missing. - */ -void Context::preventNoDataErr(QByteArray *in) -{ - int block_start = in->indexOf("-----BEGIN PGP MESSAGE-----"); - if (block_start > 0 && in->at(block_start - 1) != '\n') { - in->insert(block_start, '\n'); - } - block_start = in->indexOf("-----BEGIN PGP SIGNED MESSAGE-----"); - if (block_start > 0 && in->at(block_start - 1) != '\n') { - in->insert(block_start, '\n'); - } -} - -/* - * isSigned returns: - * - 0, if text isn't signed at all - * - 1, if text is partially signed - * - 2, if text is completly signed - */ -int Context::textIsSigned(const QByteArray &text) { - if (text.trimmed().startsWith("-----BEGIN PGP SIGNED MESSAGE-----") && text.trimmed().endsWith("-----END PGP SIGNATURE-----")) { - return 2; - } - if (text.contains("-----BEGIN PGP SIGNED MESSAGE-----") && text.contains("-----END PGP SIGNATURE-----")) { - return 1; - } - return 0; -} - -QString Context::beautifyFingerprint(QString fingerprint) -{ - uint len = fingerprint.length(); - if ((len > 0) && (len % 4 == 0)) - for (uint n = 0; 4 *(n + 1) < len; ++n) - fingerprint.insert(5 * n + 4, ' '); - return fingerprint; -} - -} - - - - - |