apt-pkg/contrib/fileutl.cc: Add WriteAtomic mode.

[apt.git] / apt-pkg / contrib / hashes.cc

diff --git a/apt-pkg/contrib/hashes.cc b/apt-pkg/contrib/hashes.cc
index 9b22a90d3321d24144c2c73761a6e2520471218e..985d89d903ea502c448d28aa2bb819c121d8eb64 100644 (file)
--- a/apt-pkg/contrib/hashes.cc
+++ b/apt-pkg/contrib/hashes.cc
@@ -11,15 +11,92 @@
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
-#ifdef __GNUG__
-#pragma implementation "apt-pkg/hashes.h"
-#endif
-
 #include <apt-pkg/hashes.h>
-    
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/macros.h>
+
 #include <unistd.h>    
-#include <system.h>    
+#include <string>
+#include <iostream>
+                                                                       /*}}}*/
+
+const char* HashString::_SupportedHashes[] = 
+{
+   "SHA256", "SHA1", "MD5Sum", NULL
+};
+
+HashString::HashString()
+{
+}
+
+HashString::HashString(string Type, string Hash) : Type(Type), Hash(Hash)
+{
+}
+
+HashString::HashString(string StringedHash)                            /*{{{*/
+{
+   // legacy: md5sum without "MD5Sum:" prefix
+   if (StringedHash.find(":") == string::npos && StringedHash.size() == 32)
+   {
+      Type = "MD5Sum";
+      Hash = StringedHash;
+      return;
+   }
+   string::size_type pos = StringedHash.find(":");
+   Type = StringedHash.substr(0,pos);
+   Hash = StringedHash.substr(pos+1, StringedHash.size() - pos);
+
+   if(_config->FindB("Debug::Hashes",false) == true)
+      std::clog << "HashString(string): " << Type << " : " << Hash << std::endl;
+}
                                                                        /*}}}*/
+bool HashString::VerifyFile(string filename) const                     /*{{{*/
+{
+   FileFd fd;
+   MD5Summation MD5;
+   SHA1Summation SHA1;
+   SHA256Summation SHA256;
+   string fileHash;
+
+   FileFd Fd(filename, FileFd::ReadOnly);
+   if(Type == "MD5Sum") 
+   {
+      MD5.AddFD(Fd.Fd(), Fd.Size());
+      fileHash = (string)MD5.Result();
+   } 
+   else if (Type == "SHA1")
+   {
+      SHA1.AddFD(Fd.Fd(), Fd.Size());
+      fileHash = (string)SHA1.Result();
+   } 
+   else if (Type == "SHA256") 
+   {
+      SHA256.AddFD(Fd.Fd(), Fd.Size());
+      fileHash = (string)SHA256.Result();
+   }
+   Fd.Close();
+
+   if(_config->FindB("Debug::Hashes",false) == true)
+      std::clog << "HashString::VerifyFile: got: " << fileHash << " expected: " << toStr() << std::endl;
+
+   return (fileHash == Hash);
+}
+                                                                       /*}}}*/
+const char** HashString::SupportedHashes()
+{
+   return _SupportedHashes;
+}
+
+bool HashString::empty() const
+{
+   return (Type.empty() || Hash.empty());
+}
+
+string HashString::toStr() const
+{
+   return Type+string(":")+Hash;
+}
 
 // Hashes::AddFD - Add the contents of the FD                          /*{{{*/
 // ---------------------------------------------------------------------
@@ -28,11 +105,16 @@ bool Hashes::AddFD(int Fd,unsigned long Size)
 {
    unsigned char Buf[64*64];
    int Res = 0;
-   while (Size != 0)
+   int ToEOF = (Size == 0);
+   while (Size != 0 || ToEOF)
    {
-      Res = read(Fd,Buf,min(Size,(unsigned long)sizeof(Buf)));
-      if (Res < 0 || (unsigned)Res != min(Size,(unsigned long)sizeof(Buf)))
-        return false;
+      unsigned n = sizeof(Buf);
+      if (!ToEOF) n = min(Size,(unsigned long)n);
+      Res = read(Fd,Buf,n);
+      if (Res < 0 || (!ToEOF && (unsigned) Res != n)) // error, or short read
+         return false;
+      if (ToEOF && Res == 0) // EOF
+         break;
       Size -= Res;
       MD5.Add(Buf,Res);
       SHA1.Add(Buf,Res);