+ if (FileGPG != File)
+ {
+ execvp(gpgvpath.c_str(), (char **) &Args[0]);
+ ioprintf(std::cerr, "Couldn't execute %s to check %s", Args[0], File.c_str());
+ exit(EINTERNAL);
+ }
+ else
+ {
+//#define UNLINK_EXIT(X) exit(X)
+#define UNLINK_EXIT(X) unlink(sig);unlink(data);exit(X)
+
+ // for clear-signed files we have created tempfiles we have to clean up
+ // and we do an additional check, so fork yet another time …
+ pid_t pid = ExecFork();
+ if(pid < 0) {
+ ioprintf(std::cerr, "Fork failed for %s to check %s", Args[0], File.c_str());
+ UNLINK_EXIT(EINTERNAL);
+ }
+ if(pid == 0)
+ {
+ if (statusfd != -1)
+ dup2(fd[1], statusfd);
+ execvp(gpgvpath.c_str(), (char **) &Args[0]);
+ ioprintf(std::cerr, "Couldn't execute %s to check %s", Args[0], File.c_str());
+ UNLINK_EXIT(EINTERNAL);
+ }
+
+ // Wait and collect the error code - taken from WaitPid as we need the exact Status
+ int Status;
+ while (waitpid(pid,&Status,0) != pid)
+ {
+ if (errno == EINTR)
+ continue;
+ ioprintf(std::cerr, _("Waited for %s but it wasn't there"), "gpgv");
+ UNLINK_EXIT(EINTERNAL);
+ }
+#undef UNLINK_EXIT
+ // we don't need the files any longer
+ unlink(sig);
+ unlink(data);
+ free(sig);
+ free(data);
+
+ // check if it exit'ed normally …
+ if (WIFEXITED(Status) == false)
+ {
+ ioprintf(std::cerr, _("Sub-process %s exited unexpectedly"), "gpgv");
+ exit(EINTERNAL);
+ }
+
+ // … and with a good exit code
+ if (WEXITSTATUS(Status) != 0)
+ {
+ ioprintf(std::cerr, _("Sub-process %s returned an error code (%u)"), "gpgv", WEXITSTATUS(Status));
+ exit(WEXITSTATUS(Status));
+ }
+
+ // everything fine
+ exit(0);
+ }
+ exit(EINTERNAL); // unreachable safe-guard
+}
+ /*}}}*/
+// SplitClearSignedFile - split message into data/signature /*{{{*/
+bool SplitClearSignedFile(std::string const &InFile, FileFd * const ContentFile,
+ std::vector<std::string> * const ContentHeader, FileFd * const SignatureFile)
+{
+ FILE *in = fopen(InFile.c_str(), "r");
+ if (in == NULL)
+ return _error->Errno("fopen", "can not open %s", InFile.c_str());
+
+ bool found_message_start = false;
+ bool found_message_end = false;
+ bool skip_until_empty_line = false;
+ bool found_signature = false;
+ bool first_line = true;
+
+ char *buf = NULL;
+ size_t buf_size = 0;
+ ssize_t line_len = 0;
+ while ((line_len = getline(&buf, &buf_size, in)) != -1)
+ {
+ _strrstrip(buf);
+ if (found_message_start == false)
+ {
+ if (strcmp(buf, "-----BEGIN PGP SIGNED MESSAGE-----") == 0)
+ {
+ found_message_start = true;
+ skip_until_empty_line = true;
+ }
+ }
+ else if (skip_until_empty_line == true)
+ {
+ if (strlen(buf) == 0)
+ skip_until_empty_line = false;
+ // save "Hash" Armor Headers, others aren't allowed
+ else if (ContentHeader != NULL && strncmp(buf, "Hash: ", strlen("Hash: ")) == 0)
+ ContentHeader->push_back(buf);
+ }
+ else if (found_signature == false)
+ {
+ if (strcmp(buf, "-----BEGIN PGP SIGNATURE-----") == 0)
+ {
+ found_signature = true;
+ found_message_end = true;
+ if (SignatureFile != NULL)
+ {
+ SignatureFile->Write(buf, strlen(buf));
+ SignatureFile->Write("\n", 1);
+ }
+ }
+ else if (found_message_end == false) // we are in the message block
+ {
+ // we don't have any fields which need dash-escaped,
+ // but implementations are free to encode all lines …
+ char const * dashfree = buf;
+ if (strncmp(dashfree, "- ", 2) == 0)
+ dashfree += 2;
+ if(first_line == true) // first line does not need a newline
+ first_line = false;
+ else if (ContentFile != NULL)
+ ContentFile->Write("\n", 1);
+ else
+ continue;
+ if (ContentFile != NULL)
+ ContentFile->Write(dashfree, strlen(dashfree));
+ }
+ }
+ else if (found_signature == true)
+ {
+ if (SignatureFile != NULL)
+ {
+ SignatureFile->Write(buf, strlen(buf));
+ SignatureFile->Write("\n", 1);
+ }
+ if (strcmp(buf, "-----END PGP SIGNATURE-----") == 0)
+ found_signature = false; // look for other signatures
+ }
+ // all the rest is whitespace, unsigned garbage or additional message blocks we ignore
+ }
+ fclose(in);
+
+ if (found_signature == true)
+ return _error->Error("Signature in file %s wasn't closed", InFile.c_str());
+
+ // if we haven't found any of them, this an unsigned file,
+ // so don't generate an error, but splitting was unsuccessful none-the-less
+ if (first_line == true && found_message_start == false && found_message_end == false)
+ return false;
+ // otherwise one missing indicates a syntax error
+ else if (first_line == true || found_message_start == false || found_message_end == false)
+ return _error->Error("Splitting of file %s failed as it doesn't contain all expected parts %i %i %i", InFile.c_str(), first_line, found_message_start, found_message_end);
+
+ return true;
+}
+ /*}}}*/
+bool OpenMaybeClearSignedFile(std::string const &ClearSignedFileName, FileFd &MessageFile) /*{{{*/
+{
+ char * const message = GenerateTemporaryFileTemplate("fileutl.message");
+ int const messageFd = mkstemp(message);
+ if (messageFd == -1)
+ {
+ free(message);
+ return _error->Errno("mkstemp", "Couldn't create temporary file to work with %s", ClearSignedFileName.c_str());
+ }
+ // we have the fd, thats enough for us
+ unlink(message);
+ free(message);
+
+ MessageFile.OpenDescriptor(messageFd, FileFd::ReadWrite, true);
+ if (MessageFile.Failed() == true)
+ return _error->Error("Couldn't open temporary file to work with %s", ClearSignedFileName.c_str());
+
+ _error->PushToStack();
+ bool const splitDone = SplitClearSignedFile(ClearSignedFileName.c_str(), &MessageFile, NULL, NULL);
+ bool const errorDone = _error->PendingError();
+ _error->MergeWithStack();
+ if (splitDone == false)
+ {
+ MessageFile.Close();
+
+ if (errorDone == true)
+ return false;
+
+ // we deal with an unsigned file
+ MessageFile.Open(ClearSignedFileName, FileFd::ReadOnly);
+ }
+ else // clear-signed
+ {
+ if (MessageFile.Seek(0) == false)
+ return _error->Errno("lseek", "Unable to seek back in message for file %s", ClearSignedFileName.c_str());
+ }
+
+ return MessageFile.Failed() == false;
projects / apt.git / blobdiff