Initialize history_out always with NULL so apt will not segfault later

[apt.git] / methods / gpgv.cc

diff --git a/methods/gpgv.cc b/methods/gpgv.cc
index b34ea8d8561c459e490653ee89e187a1f44df766..c58e6cc45781253b1d53b4b2e63007e66e6bfd07 100644 (file)
--- a/methods/gpgv.cc
+++ b/methods/gpgv.cc
@@ -1,26 +1,33 @@
 #include <apt-pkg/error.h>
 #include <apt-pkg/acquire-method.h>
 #include <apt-pkg/strutl.h>
 #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 <sys/stat.h>
-#include <unistd.h>

 #include <utime.h>
 #include <stdio.h>
 #include <fcntl.h>
 #include <errno.h>
 #include <sys/wait.h>
 #include <iostream>
 #include <utime.h>
 #include <stdio.h>
 #include <fcntl.h>
 #include <errno.h>
 #include <sys/wait.h>
 #include <iostream>

+#include <sstream>

 
 #define GNUPGPREFIX "[GNUPG:]"
 #define GNUPGBADSIG "[GNUPG:] BADSIG"
 #define GNUPGNOPUBKEY "[GNUPG:] NO_PUBKEY"
 #define GNUPGVALIDSIG "[GNUPG:] VALIDSIG"
 
 #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:
 
 class GPGVMethod : public pkgAcqMethod
 {
    private:

-   const char *VerifyGetSigners(const char *file, const char *outfile,
-                               vector<string> &GoodSigners, vector<string> &BadSigners,
+   string VerifyGetSigners(const char *file, const char *outfile,
+                               vector<string> &GoodSigners, 
+                                vector<string> &BadSigners,
+                                vector<string> &WorthlessSigners,

                                vector<string> &NoPubKeySigners);
    
    protected:
                                vector<string> &NoPubKeySigners);
    
    protected:


@@ -31,50 +38,103 @@ class GPGVMethod : public pkgAcqMethod
    GPGVMethod() : pkgAcqMethod("1.0",SingleInstance | SendConfig) {};
 };
 
    GPGVMethod() : pkgAcqMethod("1.0",SingleInstance | SendConfig) {};
 };
 

-const char *GPGVMethod::VerifyGetSigners(const char *file, const char *outfile,
+string GPGVMethod::VerifyGetSigners(const char *file, const char *outfile,

                                         vector<string> &GoodSigners,
                                         vector<string> &BadSigners,
                                         vector<string> &GoodSigners,
                                         vector<string> &BadSigners,

+                                        vector<string> &WorthlessSigners,

                                         vector<string> &NoPubKeySigners)
 {
                                         vector<string> &NoPubKeySigners)
 {

-   if (_config->FindB("Debug::Acquire::gpgv", false))
-   {
-      std::cerr << "inside VerifyGetSigners" << std::endl;
-   }
+   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;
    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))
+   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::cerr << "gpgv path: " << gpgvpath << std::endl;
-      std::cerr << "Keyring path: " << pubringpath << std::endl;
+      std::clog << "gpgv path: " << gpgvpath << std::endl;
+      std::clog << "Keyring file: " << trustedFile << std::endl;
+      std::clog << "Keyring path: " << trustedPath << std::endl;

    }
 
    }
 

-   if (stat(pubringpath.c_str(), &buff) != 0)
-      return (string("Couldn't access keyring: ") + strerror(errno)).c_str();
+   vector<string> keyrings = GetListOfFilesInDir(trustedPath, "gpg", false);
+   if (FileExists(trustedFile) == true)
+      keyrings.push_back(trustedFile);

 
 

-   if (pipe(fd) < 0)
+   if (keyrings.empty() == true)

    {
    {

-      return "Couldn't create pipe";
+      // 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)
    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)
    {
    else if (pid == 0)
    {

-      if (_config->FindB("Debug::Acquire::gpgv", false))
+      const char *Args[400];
+      unsigned int i = 0;
+
+      Args[i++] = gpgvpath.c_str();
+      Args[i++] = "--status-fd";
+      Args[i++] = "3";
+      Args[i++] = "--ignore-time-conflict";
+      for (vector<string>::const_iterator K = keyrings.begin();
+          K != keyrings.end(); ++K)
+      {
+        Args[i++] = "--keyring";
+        Args[i++] = K->c_str();
+        // check overflow (minus a bit of extra space at the end)
+        if(i >= sizeof(Args)/sizeof(char*)-5) {
+           std::clog << _("E: Too many keyrings should be passed to gpgv. Exiting.") << std::endl;
+           exit(111);
+        }
+      }
+
+      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();
+           // check overflow (minus a bit of extra space at the end)
+           if(i >= sizeof(Args)/sizeof(char*)-5) { 
+              std::clog << _("E: Argument list from Acquire::gpgv::Options too long. Exiting.") << std::endl;
+              exit(111);
+           }
+         }
+      }
+      Args[i++] = file;
+      Args[i++] = outfile;
+      Args[i++] = NULL;
+
+      if (Debug == true)

       {
       {

-         std::cerr << "Preparing to exec: " << gpgvpath
-                  << " --status-fd 3 --keyring " << pubringpath
-                  << " " << file << " " << outfile << std::endl;
+         std::clog << "Preparing to exec: " << gpgvpath;
+        for(unsigned int j=0;Args[j] != NULL; j++)
+           std::clog << " " << Args[j];
+        std::clog << std::endl;

       }
       }

-      int nullfd = open("/dev/null", O_RDONLY);
+      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); 
       close(fd[0]);
       // Redirect output to /dev/null; we read from the status fd
       dup2(nullfd, STDOUT_FILENO); 


@@ -82,11 +142,10 @@ const char *GPGVMethod::VerifyGetSigners(const char *file, const char *outfile,
       // Redirect the pipe to the status fd (3)
       dup2(fd[1], 3);
 
       // Redirect the pipe to the status fd (3)
       dup2(fd[1], 3);
 

-      putenv("LANG=");
-      putenv("LC_ALL=");
-      putenv("LC_MESSAGES=");
-      execlp(gpgvpath.c_str(), gpgvpath.c_str(), "--status-fd", "3", "--keyring", 
-            pubringpath.c_str(), file, outfile, NULL);
+      putenv((char *)"LANG=");
+      putenv((char *)"LC_ALL=");
+      putenv((char *)"LC_MESSAGES=");
+      execvp(gpgvpath.c_str(), (char **)Args);

              
       exit(111);
    }
              
       exit(111);
    }


@@ -114,8 +173,8 @@ const char *GPGVMethod::VerifyGetSigners(const char *file, const char *outfile,
          break;
       *(buffer+bufferoff) = '\0';
       bufferoff = 0;
          break;
       *(buffer+bufferoff) = '\0';
       bufferoff = 0;

-      if (_config->FindB("Debug::Acquire::gpgv", false))
-         std::cerr << "Read: " << buffer << std::endl;
+      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
 
       // Push the data into three separate vectors, which
       // we later concatenate.  They're kept separate so


@@ -123,56 +182,73 @@ const char *GPGVMethod::VerifyGetSigners(const char *file, const char *outfile,
       // it will be better.
       if (strncmp(buffer, GNUPGBADSIG, sizeof(GNUPGBADSIG)-1) == 0)
       {
       // 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)
       {
          BadSigners.push_back(string(buffer+sizeof(GNUPGPREFIX)));
       }
       
       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)));
       }
          NoPubKeySigners.push_back(string(buffer+sizeof(GNUPGPREFIX)));
       }

-
-      if (strncmp(buffer, GNUPGVALIDSIG, sizeof(GNUPGVALIDSIG)-1) == 0)
+      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 *sig = buffer + sizeof(GNUPGPREFIX);

-         char *p = sig + sizeof("VALIDSIG");
+         char *p = sig + sizeof("GOODSIG");

          while (*p && isxdigit(*p)) 
             p++;
          *p = 0;
          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));
       }
    }
    fclose(pipein);
 
    waitpid(pid, &status, 0);
          GoodSigners.push_back(string(sig));
       }
    }
    fclose(pipein);
 
    waitpid(pid, &status, 0);

-   if (_config->FindB("Debug::Acquire::gpgv", false))
+   if (Debug == true)

    {
    {

-      std::cerr <<"gpgv exited\n";
+      std::clog << "gpgv exited\n";

    }
    
    if (WEXITSTATUS(status) == 0)
    {
       if (GoodSigners.empty())
    }
    
    if (WEXITSTATUS(status) == 0)
    {
       if (GoodSigners.empty())

-         return "Internal error: Good signature, but could not determine key fingerprint?!";
-      return NULL;
+         return _("Internal error: Good signature, but could not determine key fingerprint?!");
+      return "";

    }
    else if (WEXITSTATUS(status) == 1)
    {
    }
    else if (WEXITSTATUS(status) == 1)
    {

-      return "At least one invalid signature was encountered.";
+      return _("At least one invalid signature was encountered.");

    }
    else if (WEXITSTATUS(status) == 111)
    {
    }
    else if (WEXITSTATUS(status) == 111)
    {

-      return (string("Could not execute ") + gpgvpath +
-             string(" to verify signature (is gnupg installed?)")).c_str();
+      ioprintf(ret, _("Could not execute '%s' to verify signature (is gpgv installed?)"), gpgvpath.c_str());
+      return ret.str();

    }
    else
    {
    }
    else
    {

-      return "Unknown error executing gpgv";
+      return _("Unknown error executing gpgv");

    }
 }
 
    }
 }
 


@@ -183,6 +259,8 @@ bool GPGVMethod::Fetch(FetchItem *Itm)
    string keyID;
    vector<string> GoodSigners;
    vector<string> BadSigners;
    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;
    vector<string> NoPubKeySigners;
    
    FetchResult Res;


@@ -190,52 +268,47 @@ bool GPGVMethod::Fetch(FetchItem *Itm)
    URIStart(Res);
 
    // Run gpgv on file, extract contents and get the key ID of the signer
    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);
+   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 (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
       {
          if (!BadSigners.empty())
          {
          errmsg = msg;
       else
       {
          if (!BadSigners.empty())
          {

-            errmsg += "The following signatures were invalid:\n";
+            errmsg += _("The following signatures were invalid:\n");

             for (vector<string>::iterator I = BadSigners.begin();
                 I != BadSigners.end(); I++)
                errmsg += (*I + "\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())
          {
          if (!NoPubKeySigners.empty())
          {

-             errmsg += "The following signatures couldn't be verified because the public key is not available:\n";
+             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");
          }
       }
             for (vector<string>::iterator I = NoPubKeySigners.begin();
                 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.
    // 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.


@@ -246,7 +319,7 @@ bool GPGVMethod::Fetch(FetchItem *Itm)
 
    if (_config->FindB("Debug::Acquire::gpgv", false))
    {
 
    if (_config->FindB("Debug::Acquire::gpgv", false))
    {

-      std::cerr <<"gpgv suceeded\n";
+      std::clog << "gpgv succeeded\n";

    }
 
    return true;
    }
 
    return true;


@@ -255,6 +328,8 @@ bool GPGVMethod::Fetch(FetchItem *Itm)
 
 int main()
 {
 
 int main()
 {

+   setlocale(LC_ALL, "");
+   

    GPGVMethod Mth;
 
    return Mth.Run();
    GPGVMethod Mth;
 
    return Mth.Run();