move permission changing from -item to -worker

[apt.git] / methods / gpgv.cc

diff --git a/methods/gpgv.cc b/methods/gpgv.cc
index 3ad3e8d84ca7e6b83a7cb8d2ab0afab960b31fc7..488c16826e5c70ea2d45fcdbac8649fe287cb040 100644 (file)
--- 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"
@@ -35,12 +44,22 @@ class GPGVMethod : public pkgAcqMethod
    
    protected:
    virtual bool Fetch(FetchItem *Itm);
-   
+   virtual bool Configuration(string Message);
    public:
    
    GPGVMethod() : pkgAcqMethod("1.0",SingleInstance | SendConfig) {};
 };
 
+bool GPGVMethod::Configuration(string Message)
+{
+   if (pkgAcqMethod::Configuration(Message) == false)
+      return false;
+
+   DropPrivsOrDie();
+
+   return true;
+}
+
 string GPGVMethod::VerifyGetSigners(const char *file, const char *outfile,
                                         vector<string> &GoodSigners,
                                         vector<string> &BadSigners,
@@ -48,9 +67,6 @@ 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;
@@ -64,24 +80,12 @@ string GPGVMethod::VerifyGetSigners(const char *file, const char *outfile,
    if (pid < 0)
       return string("Couldn't spawn new process") + strerror(errno);
    else if (pid == 0)
-   {
-      _error->PushToStack();
-      bool const success = SigVerify::RunGPGV(outfile, file, 3, fd);
-      if (success == false)
-      {
-        string errmsg;
-        _error->PopMessage(errmsg);
-        _error->RevertToStack();
-        return errmsg;
-      }
-      _error->RevertToStack();
-      exit(111);
-   }
+      ExecGPGV(outfile, file, 3, fd);
    close(fd[1]);
 
    FILE *pipein = fdopen(fd[0], "r");
 
-   // Loop over the output of gpgv, and check the signatures.
+   // Loop over the output of apt-key (which really is gnupg), and check the signatures.
    size_t buffersize = 64;
    char *buffer = (char *) malloc(buffersize);
    size_t bufferoff = 0;
@@ -92,8 +96,16 @@ 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++;
       }
@@ -152,12 +164,13 @@ string GPGVMethod::VerifyGetSigners(const char *file, const char *outfile,
       }
    }
    fclose(pipein);
+   free(buffer);
 
    int status;
    waitpid(pid, &status, 0);
    if (Debug == true)
    {
-      std::clog << "gpgv exited\n";
+      ioprintf(std::clog, "gpgv exited with status %i\n", WEXITSTATUS(status));
    }
    
    if (WEXITSTATUS(status) == 0)
@@ -167,18 +180,19 @@ 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 'apt-key' to verify signature (is gnupg installed?)");
+   else if (WEXITSTATUS(status) == 112)
    {
-      ioprintf(ret, _("Could not execute 'gpgv' to verify signature (is gpgv installed?)"));
-      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");
-   }
+      return _("Unknown error executing apt-key");
 }
 
 bool GPGVMethod::Fetch(FetchItem *Itm)
@@ -196,7 +210,7 @@ bool GPGVMethod::Fetch(FetchItem *Itm)
    Res.Filename = Itm->DestFile;
    URIStart(Res);
 
-   // Run gpgv on file, extract contents and get the key ID of the signer
+   // 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(),
                                  GoodSigners, BadSigners, WorthlessSigners,
                                  NoPubKeySigners);
@@ -248,7 +262,7 @@ bool GPGVMethod::Fetch(FetchItem *Itm)
 
    if (_config->FindB("Debug::Acquire::gpgv", false))
    {
-      std::clog << "gpgv succeeded\n";
+      std::clog << "apt-key succeeded\n";
    }
 
    return true;
@@ -258,7 +272,7 @@ bool GPGVMethod::Fetch(FetchItem *Itm)
 int main()
 {
    setlocale(LC_ALL, "");
-   
+
    GPGVMethod Mth;
 
    return Mth.Run();