X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/a319c4eeae62511d1cb58986742491d3e224bf20..84b286f65c55e21b4734a17474f1cba464cbbd9c:/methods/gpgv.cc

diff --git a/methods/gpgv.cc b/methods/gpgv.cc
index 5f5f23f7d..4071cbac6 100644
--- a/methods/gpgv.cc
+++ b/methods/gpgv.cc
@@ -1,20 +1,29 @@
-#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 <apt-pkg/fileutl.h>
-#include <apt-pkg/indexcopy.h>
-#include <apti18n.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 <iostream>
-#include <sstream>
-
+#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"
@@ -48,68 +57,24 @@ string GPGVMethod::VerifyGetSigners(const char *file, const char *outfile,
 					 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");
-   std::vector<const char*> Args = SigVerify::GetGPGVCommandLine();
-   if (Args.empty() == true)
-   {
-      // TRANSLATOR: %s is the trusted keyring parts directory
-      ioprintf(ret, _("No keyring installed in %s."),
-		_config->FindDir("Dir::Etc::TrustedParts", "/etc/apt/trusted.gpg.d").c_str());
-      return ret.str();
-   }
 
    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);
    else if (pid == 0)
-   {
-      Args.push_back("--status-fd");
-      Args.push_back("3");
-      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);
-   }
+      ExecGPGV(outfile, file, 3, fd);
    close(fd[1]);
 
-   pipein = fdopen(fd[0], "r"); 
-   
+   FILE *pipein = fdopen(fd[0], "r");
+
    // Loop over the output of gpgv, and check the signatures.
    size_t buffersize = 64;
    char *buffer = (char *) malloc(buffersize);
@@ -121,8 +86,16 @@ string GPGVMethod::VerifyGetSigners(const char *file, const char *outfile,
       // Read a line.  Sigh.
       while ((c = getc(pipein)) != EOF && c != '\n')
       {
-         if (bufferoff == buffersize)
-            buffer = (char *) realloc(buffer, buffersize *= 2);
+	 if (bufferoff == buffersize)
+	 {
+	    char* newBuffer = (char *) realloc(buffer, buffersize *= 2);
+	    if (newBuffer == NULL)
+	    {
+	       free(buffer);
+	       return "Couldn't allocate a buffer big enough for reading";
+	    }
+	    buffer = newBuffer;
+	 }
          *(buffer+bufferoff) = c;
          bufferoff++;
       }
@@ -181,7 +154,9 @@ string GPGVMethod::VerifyGetSigners(const char *file, const char *outfile,
       }
    }
    fclose(pipein);
+   free(buffer);
 
+   int status;
    waitpid(pid, &status, 0);
    if (Debug == true)
    {
@@ -195,18 +170,19 @@ string GPGVMethod::VerifyGetSigners(const char *file, const char *outfile,
       return "";
    }
    else if (WEXITSTATUS(status) == 1)
-   {
       return _("At least one invalid signature was encountered.");
-   }
    else if (WEXITSTATUS(status) == 111)
+      return _("Could not execute 'gpgv' to verify signature (is gpgv installed?)");
+   else if (WEXITSTATUS(status) == 112)
    {
-      ioprintf(ret, _("Could not execute '%s' to verify signature (is gpgv installed?)"), gpgvpath.c_str());
-      return ret.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");
-   }
 }
 
 bool GPGVMethod::Fetch(FetchItem *Itm)
@@ -241,21 +217,21 @@ bool GPGVMethod::Fetch(FetchItem *Itm)
          {
             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++)
+		 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");
          }
       }
@@ -286,8 +262,10 @@ bool GPGVMethod::Fetch(FetchItem *Itm)
 int main()
 {
    setlocale(LC_ALL, "");
-   
+
    GPGVMethod Mth;
 
+   Mth.DropPrivsOrDie();
+
    return Mth.Run();
 }