You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
328 lines
10 KiB
328 lines
10 KiB
#include <apt-pkg/error.h>
|
|
#include <apt-pkg/acquire-method.h>
|
|
#include <apt-pkg/strutl.h>
|
|
#include <apt-pkg/fileutl.h>
|
|
#include <apti18n.h>
|
|
|
|
#include <utime.h>
|
|
#include <stdio.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <sys/wait.h>
|
|
#include <iostream>
|
|
#include <sstream>
|
|
|
|
#include <vector>
|
|
|
|
#define GNUPGPREFIX "[GNUPG:]"
|
|
#define GNUPGBADSIG "[GNUPG:] BADSIG"
|
|
#define GNUPGNOPUBKEY "[GNUPG:] NO_PUBKEY"
|
|
#define GNUPGVALIDSIG "[GNUPG:] VALIDSIG"
|
|
#define GNUPGGOODSIG "[GNUPG:] GOODSIG"
|
|
#define GNUPGKEYEXPIRED "[GNUPG:] KEYEXPIRED"
|
|
#define GNUPGREVKEYSIG "[GNUPG:] REVKEYSIG"
|
|
#define GNUPGNODATA "[GNUPG:] NODATA"
|
|
|
|
class GPGVMethod : public pkgAcqMethod
|
|
{
|
|
private:
|
|
string VerifyGetSigners(const char *file, const char *outfile,
|
|
vector<string> &GoodSigners,
|
|
vector<string> &BadSigners,
|
|
vector<string> &WorthlessSigners,
|
|
vector<string> &NoPubKeySigners);
|
|
|
|
protected:
|
|
virtual bool Fetch(FetchItem *Itm);
|
|
|
|
public:
|
|
|
|
GPGVMethod() : pkgAcqMethod("1.0",SingleInstance | SendConfig) {};
|
|
};
|
|
|
|
string GPGVMethod::VerifyGetSigners(const char *file, const char *outfile,
|
|
vector<string> &GoodSigners,
|
|
vector<string> &BadSigners,
|
|
vector<string> &WorthlessSigners,
|
|
vector<string> &NoPubKeySigners)
|
|
{
|
|
bool const Debug = _config->FindB("Debug::Acquire::gpgv", false);
|
|
// setup a (empty) stringstream for formating the return value
|
|
std::stringstream ret;
|
|
ret.str("");
|
|
|
|
if (Debug == true)
|
|
std::clog << "inside VerifyGetSigners" << std::endl;
|
|
|
|
pid_t pid;
|
|
int fd[2];
|
|
FILE *pipein;
|
|
int status;
|
|
string const gpgvpath = _config->Find("Dir::Bin::gpg", "/usr/bin/gpgv");
|
|
// FIXME: remove support for deprecated APT::GPGV setting
|
|
string const trustedFile = _config->FindFile("Dir::Etc::Trusted",
|
|
_config->Find("APT::GPGV::TrustedKeyring", "/etc/apt/trusted.gpg").c_str());
|
|
string const trustedPath = _config->FindDir("Dir::Etc::TrustedParts", "/etc/apt/trusted.gpg.d");
|
|
if (Debug == true)
|
|
{
|
|
std::clog << "gpgv path: " << gpgvpath << std::endl;
|
|
std::clog << "Keyring file: " << trustedFile << std::endl;
|
|
std::clog << "Keyring path: " << trustedPath << std::endl;
|
|
}
|
|
|
|
vector<string> keyrings = GetListOfFilesInDir(trustedPath, "gpg", false);
|
|
if (FileExists(trustedFile) == true)
|
|
keyrings.push_back(trustedFile);
|
|
|
|
if (keyrings.empty() == true)
|
|
{
|
|
// TRANSLATOR: %s is the trusted keyring parts directory
|
|
ioprintf(ret, _("No keyring installed in %s."), trustedPath.c_str());
|
|
return ret.str();
|
|
}
|
|
|
|
if (pipe(fd) < 0)
|
|
return "Couldn't create pipe";
|
|
|
|
pid = fork();
|
|
if (pid < 0)
|
|
return string("Couldn't spawn new process") + strerror(errno);
|
|
else if (pid == 0)
|
|
{
|
|
std::vector<const char *> Args;
|
|
Args.reserve(30);
|
|
|
|
Args.push_back(gpgvpath.c_str());
|
|
Args.push_back("--status-fd");
|
|
Args.push_back("3");
|
|
Args.push_back("--ignore-time-conflict");
|
|
for (vector<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)
|
|
{
|
|
Opts = Opts->Child;
|
|
for (; Opts != 0; Opts = Opts->Next)
|
|
{
|
|
if (Opts->Value.empty() == true)
|
|
continue;
|
|
Args.push_back(Opts->Value.c_str());
|
|
}
|
|
}
|
|
Args.push_back(file);
|
|
Args.push_back(outfile);
|
|
Args.push_back(NULL);
|
|
|
|
if (Debug == true)
|
|
{
|
|
std::clog << "Preparing to exec: " << gpgvpath;
|
|
for(std::vector<const char *>::const_iterator a = Args.begin();*a != NULL; ++a)
|
|
std::clog << " " << *a;
|
|
std::clog << std::endl;
|
|
}
|
|
int const nullfd = open("/dev/null", O_RDONLY);
|
|
close(fd[0]);
|
|
// Redirect output to /dev/null; we read from the status fd
|
|
dup2(nullfd, STDOUT_FILENO);
|
|
dup2(nullfd, STDERR_FILENO);
|
|
// Redirect the pipe to the status fd (3)
|
|
dup2(fd[1], 3);
|
|
|
|
putenv((char *)"LANG=");
|
|
putenv((char *)"LC_ALL=");
|
|
putenv((char *)"LC_MESSAGES=");
|
|
execvp(gpgvpath.c_str(), (char **) &Args[0]);
|
|
|
|
exit(111);
|
|
}
|
|
close(fd[1]);
|
|
|
|
pipein = fdopen(fd[0], "r");
|
|
|
|
// Loop over the output of gpgv, and check the signatures.
|
|
size_t buffersize = 64;
|
|
char *buffer = (char *) malloc(buffersize);
|
|
size_t bufferoff = 0;
|
|
while (1)
|
|
{
|
|
int c;
|
|
|
|
// Read a line. Sigh.
|
|
while ((c = getc(pipein)) != EOF && c != '\n')
|
|
{
|
|
if (bufferoff == buffersize)
|
|
buffer = (char *) realloc(buffer, buffersize *= 2);
|
|
*(buffer+bufferoff) = c;
|
|
bufferoff++;
|
|
}
|
|
if (bufferoff == 0 && c == EOF)
|
|
break;
|
|
*(buffer+bufferoff) = '\0';
|
|
bufferoff = 0;
|
|
if (Debug == true)
|
|
std::clog << "Read: " << buffer << std::endl;
|
|
|
|
// Push the data into three separate vectors, which
|
|
// we later concatenate. They're kept separate so
|
|
// if we improve the apt method communication stuff later
|
|
// it will be better.
|
|
if (strncmp(buffer, GNUPGBADSIG, sizeof(GNUPGBADSIG)-1) == 0)
|
|
{
|
|
if (Debug == true)
|
|
std::clog << "Got BADSIG! " << std::endl;
|
|
BadSigners.push_back(string(buffer+sizeof(GNUPGPREFIX)));
|
|
}
|
|
|
|
if (strncmp(buffer, GNUPGNOPUBKEY, sizeof(GNUPGNOPUBKEY)-1) == 0)
|
|
{
|
|
if (Debug == true)
|
|
std::clog << "Got NO_PUBKEY " << std::endl;
|
|
NoPubKeySigners.push_back(string(buffer+sizeof(GNUPGPREFIX)));
|
|
}
|
|
if (strncmp(buffer, GNUPGNODATA, sizeof(GNUPGBADSIG)-1) == 0)
|
|
{
|
|
if (Debug == true)
|
|
std::clog << "Got NODATA! " << std::endl;
|
|
BadSigners.push_back(string(buffer+sizeof(GNUPGPREFIX)));
|
|
}
|
|
if (strncmp(buffer, GNUPGKEYEXPIRED, sizeof(GNUPGKEYEXPIRED)-1) == 0)
|
|
{
|
|
if (Debug == true)
|
|
std::clog << "Got KEYEXPIRED! " << std::endl;
|
|
WorthlessSigners.push_back(string(buffer+sizeof(GNUPGPREFIX)));
|
|
}
|
|
if (strncmp(buffer, GNUPGREVKEYSIG, sizeof(GNUPGREVKEYSIG)-1) == 0)
|
|
{
|
|
if (Debug == true)
|
|
std::clog << "Got REVKEYSIG! " << std::endl;
|
|
WorthlessSigners.push_back(string(buffer+sizeof(GNUPGPREFIX)));
|
|
}
|
|
if (strncmp(buffer, GNUPGGOODSIG, sizeof(GNUPGGOODSIG)-1) == 0)
|
|
{
|
|
char *sig = buffer + sizeof(GNUPGPREFIX);
|
|
char *p = sig + sizeof("GOODSIG");
|
|
while (*p && isxdigit(*p))
|
|
p++;
|
|
*p = 0;
|
|
if (Debug == true)
|
|
std::clog << "Got GOODSIG, key ID:" << sig << std::endl;
|
|
GoodSigners.push_back(string(sig));
|
|
}
|
|
}
|
|
fclose(pipein);
|
|
|
|
waitpid(pid, &status, 0);
|
|
if (Debug == true)
|
|
{
|
|
std::clog << "gpgv exited\n";
|
|
}
|
|
|
|
if (WEXITSTATUS(status) == 0)
|
|
{
|
|
if (GoodSigners.empty())
|
|
return _("Internal error: Good signature, but could not determine key fingerprint?!");
|
|
return "";
|
|
}
|
|
else if (WEXITSTATUS(status) == 1)
|
|
{
|
|
return _("At least one invalid signature was encountered.");
|
|
}
|
|
else if (WEXITSTATUS(status) == 111)
|
|
{
|
|
ioprintf(ret, _("Could not execute '%s' to verify signature (is gpgv installed?)"), gpgvpath.c_str());
|
|
return ret.str();
|
|
}
|
|
else
|
|
{
|
|
return _("Unknown error executing gpgv");
|
|
}
|
|
}
|
|
|
|
bool GPGVMethod::Fetch(FetchItem *Itm)
|
|
{
|
|
URI Get = Itm->Uri;
|
|
string Path = Get.Host + Get.Path; // To account for relative paths
|
|
string keyID;
|
|
vector<string> GoodSigners;
|
|
vector<string> BadSigners;
|
|
// a worthless signature is a expired or revoked one
|
|
vector<string> WorthlessSigners;
|
|
vector<string> NoPubKeySigners;
|
|
|
|
FetchResult Res;
|
|
Res.Filename = Itm->DestFile;
|
|
URIStart(Res);
|
|
|
|
// Run gpgv on file, extract contents and get the key ID of the signer
|
|
string msg = VerifyGetSigners(Path.c_str(), Itm->DestFile.c_str(),
|
|
GoodSigners, BadSigners, WorthlessSigners,
|
|
NoPubKeySigners);
|
|
if (GoodSigners.empty() || !BadSigners.empty() || !NoPubKeySigners.empty())
|
|
{
|
|
string errmsg;
|
|
// In this case, something bad probably happened, so we just go
|
|
// with what the other method gave us for an error message.
|
|
if (BadSigners.empty() && WorthlessSigners.empty() && NoPubKeySigners.empty())
|
|
errmsg = msg;
|
|
else
|
|
{
|
|
if (!BadSigners.empty())
|
|
{
|
|
errmsg += _("The following signatures were invalid:\n");
|
|
for (vector<string>::iterator I = BadSigners.begin();
|
|
I != BadSigners.end(); I++)
|
|
errmsg += (*I + "\n");
|
|
}
|
|
if (!WorthlessSigners.empty())
|
|
{
|
|
errmsg += _("The following signatures were invalid:\n");
|
|
for (vector<string>::iterator I = WorthlessSigners.begin();
|
|
I != WorthlessSigners.end(); I++)
|
|
errmsg += (*I + "\n");
|
|
}
|
|
if (!NoPubKeySigners.empty())
|
|
{
|
|
errmsg += _("The following signatures couldn't be verified because the public key is not available:\n");
|
|
for (vector<string>::iterator I = NoPubKeySigners.begin();
|
|
I != NoPubKeySigners.end(); I++)
|
|
errmsg += (*I + "\n");
|
|
}
|
|
}
|
|
// this is only fatal if we have no good sigs or if we have at
|
|
// least one bad signature. good signatures and NoPubKey signatures
|
|
// happen easily when a file is signed with multiple signatures
|
|
if(GoodSigners.empty() or !BadSigners.empty())
|
|
return _error->Error("%s", errmsg.c_str());
|
|
}
|
|
|
|
// Just pass the raw output up, because passing it as a real data
|
|
// structure is too difficult with the method stuff. We keep it
|
|
// as three separate vectors for future extensibility.
|
|
Res.GPGVOutput = GoodSigners;
|
|
Res.GPGVOutput.insert(Res.GPGVOutput.end(),BadSigners.begin(),BadSigners.end());
|
|
Res.GPGVOutput.insert(Res.GPGVOutput.end(),NoPubKeySigners.begin(),NoPubKeySigners.end());
|
|
URIDone(Res);
|
|
|
|
if (_config->FindB("Debug::Acquire::gpgv", false))
|
|
{
|
|
std::clog << "gpgv succeeded\n";
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
int main()
|
|
{
|
|
setlocale(LC_ALL, "");
|
|
|
|
GPGVMethod Mth;
|
|
|
|
return Mth.Run();
|
|
}
|
|
|