// Include Files /*{{{*/
#include<config.h>
+#include<apt-pkg/configuration.h>
+#include<apt-pkg/error.h>
+#include<apt-pkg/strutl.h>
+#include<apt-pkg/fileutl.h>
+#include<apt-pkg/gpgv.h>
+
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
-#include <sys/stat.h>
-#include <sys/types.h>
#include <sys/wait.h>
+#include <unistd.h>
+#include <stddef.h>
-#include<apt-pkg/configuration.h>
-#include<apt-pkg/error.h>
-#include<apt-pkg/strutl.h>
-#include<apt-pkg/fileutl.h>
-#include<apt-pkg/gpgv.h>
+#include <algorithm>
+#include <fstream>
+#include <iostream>
+#include <sstream>
+#include <string>
+#include <vector>
#include <apti18n.h>
/*}}}*/
static char * GenerateTemporaryFileTemplate(const char *basename) /*{{{*/
{
- const char *tmpdir = getenv("TMPDIR");
-#ifdef P_tmpdir
- if (!tmpdir)
- tmpdir = P_tmpdir;
-#endif
- if (!tmpdir)
- tmpdir = "/tmp";
-
std::string out;
- strprintf(out, "%s/%s.XXXXXX", tmpdir, basename);
+ std::string tmpdir = GetTempDir();
+ strprintf(out, "%s/%s.XXXXXX", tmpdir.c_str(), basename);
return strdup(out.c_str());
}
/*}}}*/
// ExecGPGV - returns the command needed for verify /*{{{*/
// ---------------------------------------------------------------------
-/* Generating the commandline for calling gpgv is somehow complicated as
+/* Generating the commandline for calling gpg is somehow complicated as
we need to add multiple keyrings and user supplied options.
- Also, as gpgv has no options to enforce a certain reduced style of
+ Also, as gpg has no options to enforce a certain reduced style of
clear-signed files (=the complete content of the file is signed and
the content isn't encoded) we do a divide and conquer approach here
+ and split up the clear-signed file in message and signature for gpg.
+ And as a cherry on the cake, we use our apt-key wrapper to do part
+ of the lifting in regards to merging keyrings. Fun for the whole family.
*/
+static bool iovprintf(std::ostream &out, const char *format,
+ va_list &args, ssize_t &size) {
+ char *S = (char*)malloc(size);
+ ssize_t const n = vsnprintf(S, size, format, args);
+ if (n > -1 && n < size) {
+ out << S;
+ free(S);
+ return true;
+ } else {
+ if (n > -1)
+ size = n + 1;
+ else
+ size *= 2;
+ }
+ free(S);
+ return false;
+}
+static void APT_PRINTF(4) apt_error(std::ostream &outterm, int const statusfd, int fd[2], const char *format, ...)
+{
+ std::ostringstream outstr;
+ std::ostream &out = (statusfd == -1) ? outterm : outstr;
+ va_list args;
+ ssize_t size = 400;
+ while (true) {
+ bool ret;
+ va_start(args,format);
+ ret = iovprintf(out, format, args, size);
+ va_end(args);
+ if (ret == true)
+ break;
+ }
+ if (statusfd != -1)
+ {
+ auto const errtag = "[APTKEY:] ERROR ";
+ outstr << '\n';
+ auto const errtext = outstr.str();
+ if (FileFd::Write(fd[1], errtag, strlen(errtag)) == false ||
+ FileFd::Write(fd[1], errtext.data(), errtext.size()) == false)
+ outterm << errtext << std::flush;
+ }
+}
void ExecGPGV(std::string const &File, std::string const &FileGPG,
- int const &statusfd, int fd[2])
+ int const &statusfd, int fd[2], std::string const &key)
{
#define EINTERNAL 111
- std::string const gpgvpath = _config->Find("Dir::Bin::gpg", "/usr/bin/gpgv");
- // FIXME: remove support for deprecated APT::GPGV setting
- std::string const trustedFile = _config->Find("APT::GPGV::TrustedKeyring", _config->FindFile("Dir::Etc::Trusted"));
- std::string const trustedPath = _config->FindDir("Dir::Etc::TrustedParts");
+ std::string const aptkey = _config->Find("Dir::Bin::apt-key", CMAKE_INSTALL_FULL_BINDIR "/apt-key");
bool const Debug = _config->FindB("Debug::Acquire::gpgv", false);
+ struct exiter {
+ std::vector<const char *> files;
+ void operator ()(int code) APT_NORETURN {
+ std::for_each(files.begin(), files.end(), unlink);
+ exit(code);
+ }
+ } local_exit;
- if (Debug == true)
- {
- std::clog << "gpgv path: " << gpgvpath << std::endl;
- std::clog << "Keyring file: " << trustedFile << std::endl;
- std::clog << "Keyring path: " << trustedPath << std::endl;
- }
-
- std::vector<std::string> keyrings;
- if (DirectoryExists(trustedPath))
- keyrings = GetListOfFilesInDir(trustedPath, "gpg", false, true);
- if (RealFileExists(trustedFile) == true)
- keyrings.push_back(trustedFile);
std::vector<const char *> Args;
- Args.reserve(30);
+ Args.reserve(10);
- if (keyrings.empty() == true)
+ Args.push_back(aptkey.c_str());
+ Args.push_back("--quiet");
+ Args.push_back("--readonly");
+ if (key.empty() == false)
{
- // TRANSLATOR: %s is the trusted keyring parts directory
- ioprintf(std::cerr, _("No keyring installed in %s."),
- _config->FindDir("Dir::Etc::TrustedParts").c_str());
- exit(EINTERNAL);
+ if (key[0] == '/')
+ {
+ Args.push_back("--keyring");
+ Args.push_back(key.c_str());
+ }
+ else
+ {
+ Args.push_back("--keyid");
+ Args.push_back(key.c_str());
+ }
}
-
- Args.push_back(gpgvpath.c_str());
- Args.push_back("--ignore-time-conflict");
+ Args.push_back("verify");
char statusfdstr[10];
if (statusfd != -1)
Args.push_back(statusfdstr);
}
- for (std::vector<std::string>::const_iterator K = keyrings.begin();
- K != keyrings.end(); ++K)
- {
- Args.push_back("--keyring");
- Args.push_back(K->c_str());
- }
-
Configuration::Item const *Opts;
Opts = _config->Tree("Acquire::gpgv::Options");
if (Opts != 0)
}
}
- int sigFd = -1;
- int dataFd = -1;
+ enum { DETACHED, CLEARSIGNED } releaseSignature = (FileGPG != File) ? DETACHED : CLEARSIGNED;
std::vector<std::string> dataHeader;
char * sig = NULL;
char * data = NULL;
+ char * conf = nullptr;
- // file with detached signature
- if (FileGPG != File)
+ // Dump the configuration so apt-key picks up the correct Dir values
+ {
+ conf = GenerateTemporaryFileTemplate("apt.conf");
+ if (conf == nullptr) {
+ apt_error(std::cerr, statusfd, fd, "Couldn't create tempfile names for passing config to apt-key");
+ local_exit(EINTERNAL);
+ }
+ int confFd = mkstemp(conf);
+ if (confFd == -1) {
+ apt_error(std::cerr, statusfd, fd, "Couldn't create temporary file %s for passing config to apt-key", conf);
+ local_exit(EINTERNAL);
+ }
+ local_exit.files.push_back(conf);
+
+ std::ofstream confStream(conf);
+ close(confFd);
+ _config->Dump(confStream);
+ confStream.close();
+ setenv("APT_CONFIG", conf, 1);
+ }
+
+ if (releaseSignature == DETACHED)
{
Args.push_back(FileGPG.c_str());
Args.push_back(File.c_str());
data = GenerateTemporaryFileTemplate("apt.data");
if (sig == NULL || data == NULL)
{
- ioprintf(std::cerr, "Couldn't create tempfiles for splitting up %s", File.c_str());
- exit(EINTERNAL);
+ apt_error(std::cerr, statusfd, fd, "Couldn't create tempfile names for splitting up %s", File.c_str());
+ local_exit(EINTERNAL);
}
- sigFd = mkstemp(sig);
- dataFd = mkstemp(data);
- int const duppedSigFd = dup(sigFd);
- int const duppedDataFd = dup(dataFd);
+ int const sigFd = mkstemp(sig);
+ int const dataFd = mkstemp(data);
+ if (dataFd != -1)
+ local_exit.files.push_back(data);
+ if (sigFd != -1)
+ local_exit.files.push_back(sig);
+ if (sigFd == -1 || dataFd == -1)
+ {
+ apt_error(std::cerr, statusfd, fd, "Couldn't create tempfiles for splitting up %s", File.c_str());
+ local_exit(EINTERNAL);
+ }
- if (dataFd == -1 || sigFd == -1 || duppedDataFd == -1 || duppedSigFd == -1 ||
- SplitClearSignedFile(File, duppedDataFd, &dataHeader, duppedSigFd) == false)
+ FileFd signature;
+ signature.OpenDescriptor(sigFd, FileFd::WriteOnly, true);
+ FileFd message;
+ message.OpenDescriptor(dataFd, FileFd::WriteOnly, true);
+
+ if (signature.Failed() == true || message.Failed() == true ||
+ SplitClearSignedFile(File, &message, &dataHeader, &signature) == false)
{
- if (dataFd != -1)
- unlink(sig);
- if (sigFd != -1)
- unlink(data);
- ioprintf(std::cerr, "Splitting up %s into data and signature failed", File.c_str());
- exit(EINTERNAL);
+ apt_error(std::cerr, statusfd, fd, "Splitting up %s into data and signature failed", File.c_str());
+ local_exit(112);
}
- lseek(dataFd, 0, SEEK_SET);
- lseek(sigFd, 0, SEEK_SET);
Args.push_back(sig);
Args.push_back(data);
}
if (Debug == true)
{
- std::clog << "Preparing to exec: " << gpgvpath;
+ std::clog << "Preparing to exec: ";
for (std::vector<const char *>::const_iterator a = Args.begin(); *a != NULL; ++a)
std::clog << " " << *a;
std::clog << std::endl;
if (statusfd != -1)
{
- int const nullfd = open("/dev/null", O_RDONLY);
+ int const nullfd = open("/dev/null", O_WRONLY);
close(fd[0]);
// Redirect output to /dev/null; we read from the status fd
if (statusfd != STDOUT_FILENO)
putenv((char *)"LC_MESSAGES=");
}
- 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);
+
+ // 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) {
+ apt_error(std::cerr, statusfd, fd, "Fork failed for %s to check %s", Args[0], File.c_str());
+ local_exit(EINTERNAL);
}
- else
+ if(pid == 0)
{
-//#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 as we have the filedescriptors still open
- 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));
- }
+ if (statusfd != -1)
+ dup2(fd[1], statusfd);
+ execvp(Args[0], (char **) &Args[0]);
+ apt_error(std::cerr, statusfd, fd, "Couldn't execute %s to check %s", Args[0], File.c_str());
+ local_exit(EINTERNAL);
+ }
- /* looks like its fine. Our caller will check the status fd,
- but we construct a good-known clear-signed file without garbage
- and other non-sense. In a perfect world, we get the same file,
- but empty lines, trailing whitespaces and stuff makes it inperfect … */
- if (RecombineToClearSignedFile(File, dataFd, dataHeader, sigFd) == false)
- {
- _error->DumpErrors(std::cerr);
- 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;
+ apt_error(std::cerr, statusfd, fd, _("Waited for %s but it wasn't there"), "apt-key");
+ local_exit(EINTERNAL);
+ }
- // everything fine, we have a clean file now!
- exit(0);
+ // check if it exit'ed normally …
+ if (WIFEXITED(Status) == false)
+ {
+ apt_error(std::cerr, statusfd, fd, _("Sub-process %s exited unexpectedly"), "apt-key");
+ local_exit(EINTERNAL);
}
- exit(EINTERNAL); // unreachable safe-guard
-}
- /*}}}*/
-// RecombineToClearSignedFile - combine data/signature to message /*{{{*/
-bool RecombineToClearSignedFile(std::string const &OutFile, int const ContentFile,
- std::vector<std::string> const &ContentHeader, int const SignatureFile)
-{
- FILE *clean_file = fopen(OutFile.c_str(), "w");
- fputs("-----BEGIN PGP SIGNED MESSAGE-----\n", clean_file);
- for (std::vector<std::string>::const_iterator h = ContentHeader.begin(); h != ContentHeader.end(); ++h)
- fprintf(clean_file, "%s\n", h->c_str());
- fputs("\n", clean_file);
-
- FILE *data_file = fdopen(ContentFile, "r");
- FILE *sig_file = fdopen(SignatureFile, "r");
- if (data_file == NULL || sig_file == NULL)
+
+ // … and with a good exit code
+ if (WEXITSTATUS(Status) != 0)
{
- fclose(clean_file);
- return _error->Error("Couldn't open splitfiles to recombine them into %s", OutFile.c_str());
+ // we forward the statuscode, so don't generate a message on the fd in this case
+ apt_error(std::cerr, -1, fd, _("Sub-process %s returned an error code (%u)"), "apt-key", WEXITSTATUS(Status));
+ local_exit(WEXITSTATUS(Status));
}
- char *buf = NULL;
- size_t buf_size = 0;
- while (getline(&buf, &buf_size, data_file) != -1)
- fputs(buf, clean_file);
- fclose(data_file);
- fputs("\n", clean_file);
- while (getline(&buf, &buf_size, sig_file) != -1)
- fputs(buf, clean_file);
- fclose(sig_file);
- fclose(clean_file);
- return true;
+
+ // everything fine
+ local_exit(0);
}
/*}}}*/
// SplitClearSignedFile - split message into data/signature /*{{{*/
-bool SplitClearSignedFile(std::string const &InFile, int const ContentFile,
- std::vector<std::string> * const ContentHeader, int const SignatureFile)
+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());
- FILE *out_content = NULL;
- FILE *out_signature = NULL;
- if (ContentFile != -1)
- {
- out_content = fdopen(ContentFile, "w");
- if (out_content == NULL)
- {
- fclose(in);
- return _error->Errno("fdopen", "Failed to open file to write content to from %s", InFile.c_str());
- }
- }
- if (SignatureFile != -1)
- {
- out_signature = fdopen(SignatureFile, "w");
- if (out_signature == NULL)
- {
- fclose(in);
- if (out_content != NULL)
- fclose(out_content);
- return _error->Errno("fdopen", "Failed to open file to write signature to from %s", InFile.c_str());
- }
- }
-
bool found_message_start = false;
bool found_message_end = false;
bool skip_until_empty_line = false;
{
found_signature = true;
found_message_end = true;
- if (out_signature != NULL)
- fprintf(out_signature, "%s\n", buf);
+ if (SignatureFile != NULL)
+ {
+ SignatureFile->Write(buf, strlen(buf));
+ SignatureFile->Write("\n", 1);
+ }
}
- else if (found_message_end == false)
+ else if (found_message_end == false) // we are in the message block
{
- // 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
- {
- if (out_content != NULL)
- fprintf(out_content, "%s", buf);
first_line = false;
- }
- else if (out_content != NULL)
- fprintf(out_content, "\n%s", buf);
+ else if (ContentFile != NULL)
+ ContentFile->Write("\n", 1);
+ else
+ continue;
+ if (ContentFile != NULL)
+ ContentFile->Write(dashfree, strlen(dashfree));
}
}
else if (found_signature == true)
{
- if (out_signature != NULL)
- fprintf(out_signature, "%s\n", buf);
+ 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
}
- if (out_content != NULL)
- fclose(out_content);
- if (out_signature != NULL)
- fclose(out_signature);
fclose(in);
+ if (buf != NULL)
+ free(buf);
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 (found_message_start == false && found_message_end == false)
+ if (first_line == true && found_message_start == false && found_message_end == false)
return false;
// otherwise one missing indicates a syntax error
- else if (found_message_start == false || found_message_end == false)
- return _error->Error("Splitting of file %s failed as it doesn't contain all expected parts", InFile.c_str());
+ 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;
}
unlink(message);
free(message);
- int const duppedMsg = dup(messageFd);
- if (duppedMsg == -1)
- return _error->Errno("dup", "Couldn't duplicate FD to work with %s", ClearSignedFileName.c_str());
+ MessageFile.OpenDescriptor(messageFd, FileFd::ReadWrite | FileFd::BufferedWrite, 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(), messageFd, NULL, -1);
+ bool const splitDone = SplitClearSignedFile(ClearSignedFileName, &MessageFile, NULL, NULL);
bool const errorDone = _error->PendingError();
_error->MergeWithStack();
if (splitDone == false)
{
- close(duppedMsg);
+ MessageFile.Close();
if (errorDone == true)
return false;
}
else // clear-signed
{
- if (lseek(duppedMsg, 0, SEEK_SET) < 0)
- return _error->Errno("lseek", "Unable to seek back in message fd for file %s", ClearSignedFileName.c_str());
- MessageFile.OpenDescriptor(duppedMsg, FileFd::ReadOnly, true);
+ 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