-#include <apt-pkg/error.h>
+#include <config.h>
+
#include <apt-pkg/acquire-method.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/gpgv.h>
#include <apt-pkg/strutl.h>
-#include <apti18n.h>
+#include <apt-pkg/fileutl.h>
+#include "aptmethod.h"
-#include <sys/stat.h>
-#include <unistd.h>
-#include <utime.h>
-#include <stdio.h>
-#include <fcntl.h>
+#include <ctype.h>
#include <errno.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
#include <sys/wait.h>
+#include <unistd.h>
+
+#include <algorithm>
#include <iostream>
+#include <string>
+#include <vector>
+
+#include <apti18n.h>
+
+using std::string;
+using std::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
+class GPGVMethod : public aptMethod
{
private:
- const char *VerifyGetSigners(const char *file, const char *outfile,
- vector<string> &GoodSigners, vector<string> &BadSigners,
+ string VerifyGetSigners(const char *file, const char *outfile,
+ std::string const &key,
+ vector<string> &GoodSigners,
+ vector<string> &BadSigners,
+ vector<string> &WorthlessSigners,
vector<string> &NoPubKeySigners);
protected:
- virtual bool Fetch(FetchItem *Itm);
-
+ virtual bool URIAcquire(std::string const &Message, FetchItem *Itm) APT_OVERRIDE;
public:
- GPGVMethod() : pkgAcqMethod("1.0",SingleInstance | SendConfig) {};
+ GPGVMethod() : aptMethod("gpgv","1.0",SingleInstance | SendConfig) {};
};
-const char *GPGVMethod::VerifyGetSigners(const char *file, const char *outfile,
+string GPGVMethod::VerifyGetSigners(const char *file, const char *outfile,
+ std::string const &key,
vector<string> &GoodSigners,
vector<string> &BadSigners,
+ vector<string> &WorthlessSigners,
vector<string> &NoPubKeySigners)
{
- if (_config->FindB("Debug::Acquire::gpgv", false))
- {
- std::cerr << "inside VerifyGetSigners" << std::endl;
- }
- pid_t pid;
- int fd[2];
- FILE *pipein;
- int status;
- struct stat buff;
- string gpgvpath = _config->Find("Dir::Bin::gpg", "/usr/bin/gpgv");
- string pubringpath = _config->Find("APT::GPGV::TrustedKeyring", "/etc/apt/trusted.gpg");
- if (_config->FindB("Debug::Acquire::gpgv", false))
- {
- std::cerr << "gpgv path: " << gpgvpath << std::endl;
- std::cerr << "Keyring path: " << pubringpath << std::endl;
- }
+ bool const Debug = _config->FindB("Debug::Acquire::gpgv", false);
- if (stat(pubringpath.c_str(), &buff) != 0)
- return (string("Couldn't access keyring: ") + strerror(errno)).c_str();
+ if (Debug == true)
+ std::clog << "inside VerifyGetSigners" << std::endl;
+
+ int fd[2];
+ bool const keyIsID = (key.empty() == false && key[0] != '/');
if (pipe(fd) < 0)
- {
return "Couldn't create pipe";
- }
- pid = fork();
+ pid_t pid = fork();
if (pid < 0)
- {
- return (string("Couldn't spawn new process") + strerror(errno)).c_str();
- }
+ return string("Couldn't spawn new process") + strerror(errno);
else if (pid == 0)
- {
- const char *Args[400];
- unsigned int i = 0;
-
- Args[i++] = gpgvpath.c_str();
- Args[i++] = "--status-fd";
- Args[i++] = "3";
- Args[i++] = "--keyring";
- Args[i++] = pubringpath.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[i++] = Opts->Value.c_str();
- if(i >= 395) {
- std::cerr << _("E: Argument list from Acquire::gpgv::Options too long. Exiting.") << std::endl;
- exit(111);
- }
- }
- }
- Args[i++] = file;
- Args[i++] = outfile;
- Args[i++] = NULL;
-
- if (_config->FindB("Debug::Acquire::gpgv", false))
- {
- std::cerr << "Preparing to exec: " << gpgvpath;
- for(unsigned int j=0;Args[j] != NULL; j++)
- std::cerr << " " << Args[j];
- std::cerr << std::endl;
- }
- int 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("LANG=");
- putenv("LC_ALL=");
- putenv("LC_MESSAGES=");
- execvp(gpgvpath.c_str(), (char **)Args);
-
- exit(111);
- }
+ ExecGPGV(outfile, file, 3, fd, (keyIsID ? "" : key));
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;
+ FILE *pipein = fdopen(fd[0], "r");
+
+ // Loop over the output of apt-key (which really is gnupg), and check the signatures.
+ std::vector<std::string> ValidSigners;
+ size_t buffersize = 0;
+ char *buffer = NULL;
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 (_config->FindB("Debug::Acquire::gpgv", false))
- std::cerr << "Read: " << buffer << std::endl;
+ if (getline(&buffer, &buffersize, pipein) == -1)
+ break;
+ 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
// it will be better.
if (strncmp(buffer, GNUPGBADSIG, sizeof(GNUPGBADSIG)-1) == 0)
{
- if (_config->FindB("Debug::Acquire::gpgv", false))
- std::cerr << "Got BADSIG! " << std::endl;
+ if (Debug == true)
+ std::clog << "Got BADSIG! " << std::endl;
BadSigners.push_back(string(buffer+sizeof(GNUPGPREFIX)));
}
-
- if (strncmp(buffer, GNUPGNOPUBKEY, sizeof(GNUPGNOPUBKEY)-1) == 0)
+ else if (strncmp(buffer, GNUPGNOPUBKEY, sizeof(GNUPGNOPUBKEY)-1) == 0)
{
- if (_config->FindB("Debug::Acquire::gpgv", false))
- std::cerr << "Got NO_PUBKEY " << std::endl;
+ if (Debug == true)
+ std::clog << "Got NO_PUBKEY " << std::endl;
NoPubKeySigners.push_back(string(buffer+sizeof(GNUPGPREFIX)));
}
-
- if (strncmp(buffer, GNUPGVALIDSIG, sizeof(GNUPGVALIDSIG)-1) == 0)
+ else if (strncmp(buffer, GNUPGNODATA, sizeof(GNUPGBADSIG)-1) == 0)
+ {
+ if (Debug == true)
+ std::clog << "Got NODATA! " << std::endl;
+ BadSigners.push_back(string(buffer+sizeof(GNUPGPREFIX)));
+ }
+ else if (strncmp(buffer, GNUPGKEYEXPIRED, sizeof(GNUPGKEYEXPIRED)-1) == 0)
+ {
+ if (Debug == true)
+ std::clog << "Got KEYEXPIRED! " << std::endl;
+ WorthlessSigners.push_back(string(buffer+sizeof(GNUPGPREFIX)));
+ }
+ else if (strncmp(buffer, GNUPGREVKEYSIG, sizeof(GNUPGREVKEYSIG)-1) == 0)
+ {
+ if (Debug == true)
+ std::clog << "Got REVKEYSIG! " << std::endl;
+ WorthlessSigners.push_back(string(buffer+sizeof(GNUPGPREFIX)));
+ }
+ else if (strncmp(buffer, GNUPGGOODSIG, sizeof(GNUPGGOODSIG)-1) == 0)
{
char *sig = buffer + sizeof(GNUPGPREFIX);
- char *p = sig + sizeof("VALIDSIG");
+ char *p = sig + sizeof("GOODSIG");
while (*p && isxdigit(*p))
p++;
*p = 0;
- if (_config->FindB("Debug::Acquire::gpgv", false))
- std::cerr << "Got VALIDSIG, key ID:" << sig << std::endl;
+ if (Debug == true)
+ std::clog << "Got GOODSIG, key ID:" << sig << std::endl;
GoodSigners.push_back(string(sig));
}
+ else if (strncmp(buffer, GNUPGVALIDSIG, sizeof(GNUPGVALIDSIG)-1) == 0)
+ {
+ char *sig = buffer + sizeof(GNUPGVALIDSIG);
+ char *p = sig;
+ while (*p && isxdigit(*p))
+ p++;
+ *p = 0;
+ if (Debug == true)
+ std::clog << "Got VALIDSIG, key ID: " << sig << std::endl;
+ ValidSigners.push_back(string(sig));
+ }
}
fclose(pipein);
+ free(buffer);
+
+ // apt-key has a --keyid parameter, but this requires gpg, so we call it without it
+ // and instead check after the fact which keyids where used for verification
+ if (keyIsID == true)
+ {
+ if (Debug == true)
+ std::clog << "GoodSigs needs to be limited to keyid " << key << std::endl;
+ std::vector<std::string>::iterator const foundItr = std::find(ValidSigners.begin(), ValidSigners.end(), key);
+ bool const found = (foundItr != ValidSigners.end());
+ std::copy(GoodSigners.begin(), GoodSigners.end(), std::back_insert_iterator<std::vector<std::string> >(NoPubKeySigners));
+ if (found)
+ {
+ // we look for GOODSIG here as well as an expired sig is a valid sig as well (but not a good one)
+ std::string const goodlongkeyid = "GOODSIG " + key.substr(24, 16);
+ bool const foundGood = std::find(GoodSigners.begin(), GoodSigners.end(), goodlongkeyid) != GoodSigners.end();
+ if (Debug == true)
+ std::clog << "Key " << key << " is valid sig, is " << goodlongkeyid << " also a good one? " << (foundGood ? "yes" : "no") << std::endl;
+ GoodSigners.clear();
+ if (foundGood)
+ {
+ GoodSigners.push_back(goodlongkeyid);
+ NoPubKeySigners.erase(std::remove(NoPubKeySigners.begin(), NoPubKeySigners.end(), goodlongkeyid), NoPubKeySigners.end());
+ }
+ }
+ else
+ GoodSigners.clear();
+ }
+ int status;
waitpid(pid, &status, 0);
- if (_config->FindB("Debug::Acquire::gpgv", false))
+ if (Debug == true)
{
- std::cerr << "gpgv exited\n";
+ ioprintf(std::clog, "gpgv exited with status %i\n", WEXITSTATUS(status));
}
if (WEXITSTATUS(status) == 0)
{
- if (GoodSigners.empty())
- return _("Internal error: Good signature, but could not determine key fingerprint?!");
- return NULL;
+ if (keyIsID)
+ {
+ // gpgv will report success, but we want to enforce a certain keyring
+ // so if we haven't found the key the valid we found is in fact invalid
+ if (GoodSigners.empty())
+ return _("At least one invalid signature was encountered.");
+ }
+ else
+ {
+ 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)
+ return _("Could not execute 'apt-key' to verify signature (is gnupg installed?)");
+ else if (WEXITSTATUS(status) == 112)
{
- // FIXME String concatenation considered harmful.
- return (string(_("Could not execute ")) + gpgvpath +
- string(_(" to verify signature (is gnupg installed?)"))).c_str();
+ // acquire system checks for "NODATA" to generate GPG errors (the others are only warnings)
+ std::string errmsg;
+ //TRANSLATORS: %s is a single techy word like 'NODATA'
+ strprintf(errmsg, _("Clearsigned file isn't valid, got '%s' (does the network require authentication?)"), "NODATA");
+ return errmsg;
}
else
- {
- return _("Unknown error executing gpgv");
- }
+ return _("Unknown error executing apt-key");
}
-bool GPGVMethod::Fetch(FetchItem *Itm)
+bool GPGVMethod::URIAcquire(std::string const &Message, FetchItem *Itm)
{
- URI Get = Itm->Uri;
- string Path = Get.Host + Get.Path; // To account for relative paths
- string keyID;
+ URI const Get = Itm->Uri;
+ string const Path = Get.Host + Get.Path; // To account for relative paths
+ std::string const key = LookupTag(Message, "Signed-By");
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
- const char *msg = VerifyGetSigners(Path.c_str(), Itm->DestFile.c_str(),
- GoodSigners, BadSigners, NoPubKeySigners);
+ // Run apt-key on file, extract contents and get the key ID of the signer
+ string msg = VerifyGetSigners(Path.c_str(), Itm->DestFile.c_str(), key,
+ 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() && NoPubKeySigners.empty())
+ if (BadSigners.empty() && WorthlessSigners.empty() && NoPubKeySigners.empty())
errmsg = msg;
else
{
{
errmsg += _("The following signatures were invalid:\n");
for (vector<string>::iterator I = BadSigners.begin();
- I != BadSigners.end(); I++)
+ 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++)
+ I != NoPubKeySigners.end(); ++I)
errmsg += (*I + "\n");
}
}
- return _error->Error(errmsg.c_str());
+ // 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());
}
- // Transfer the modification times
- struct stat Buf;
- if (stat(Path.c_str(),&Buf) != 0)
- return _error->Errno("stat",_("Failed to stat %s"), Path.c_str());
-
- struct utimbuf TimeBuf;
- TimeBuf.actime = Buf.st_atime;
- TimeBuf.modtime = Buf.st_mtime;
- if (utime(Itm->DestFile.c_str(),&TimeBuf) != 0)
- return _error->Errno("utime",_("Failed to set modification time"));
-
- if (stat(Itm->DestFile.c_str(),&Buf) != 0)
- return _error->Errno("stat",_("Failed to stat"));
-
- // Return a Done response
- Res.LastModified = Buf.st_mtime;
- Res.Size = Buf.st_size;
// 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.
if (_config->FindB("Debug::Acquire::gpgv", false))
{
- std::cerr << "gpgv succeeded\n";
+ std::clog << "apt-key succeeded\n";
}
return true;
int main()
{
setlocale(LC_ALL, "");
-
+
GPGVMethod Mth;
return Mth.Run();
projects / apt.git / blobdiff