X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/57722714255118560c98b3245413ff5f693b993c..b3501edb7091ca3aa6c2d6d96dc667b8161dd2b9:/apt-pkg/contrib/hashes.cc

diff --git a/apt-pkg/contrib/hashes.cc b/apt-pkg/contrib/hashes.cc
index b43771ea7..199e395f6 100644
--- a/apt-pkg/contrib/hashes.cc
+++ b/apt-pkg/contrib/hashes.cc
@@ -11,39 +11,50 @@
    ##################################################################### */
 									/*}}}*/
 // Include Files							/*{{{*/
+#include <config.h>
+
 #include <apt-pkg/hashes.h>
 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/configuration.h>
-    
-#include <unistd.h>    
-#include <system.h>    
+#include <apt-pkg/md5.h>
+#include <apt-pkg/sha1.h>
+#include <apt-pkg/sha2.h>
+
+#include <stddef.h>
+#include <algorithm>
+#include <unistd.h>
 #include <string>
 #include <iostream>
 									/*}}}*/
 
-const char* HashString::_SupportedHashes[] = 
+const char * HashString::_SupportedHashes[] =
 {
-   "SHA256", "SHA1", "MD5Sum", NULL
+   "SHA512", "SHA256", "SHA1", "MD5Sum", NULL
 };
 
 HashString::HashString()
 {
 }
 
-HashString::HashString(string Type, string Hash) : Type(Type), Hash(Hash)
+HashString::HashString(std::string Type, std::string Hash) : Type(Type), Hash(Hash)
 {
 }
 
-HashString::HashString(string StringedHash)				/*{{{*/
+HashString::HashString(std::string StringedHash)			/*{{{*/
 {
-   // legacy: md5sum without "MD5Sum:" prefix
-   if (StringedHash.find(":") == string::npos && StringedHash.size() == 32)
+   if (StringedHash.find(":") == std::string::npos)
    {
-      Type = "MD5Sum";
-      Hash = StringedHash;
+      // legacy: md5sum without "MD5Sum:" prefix
+      if (StringedHash.size() == 32)
+      {
+	 Type = "MD5Sum";
+	 Hash = StringedHash;
+      }
+      if(_config->FindB("Debug::Hashes",false) == true)
+	 std::clog << "HashString(string): invalid StringedHash " << StringedHash << std::endl;
       return;
    }
-   string::size_type pos = StringedHash.find(":");
+   std::string::size_type pos = StringedHash.find(":");
    Type = StringedHash.substr(0,pos);
    Hash = StringedHash.substr(pos+1, StringedHash.size() - pos);
 
@@ -51,76 +62,267 @@ HashString::HashString(string StringedHash)				/*{{{*/
       std::clog << "HashString(string): " << Type << " : " << Hash << std::endl;
 }
 									/*}}}*/
-bool HashString::VerifyFile(string filename) const			/*{{{*/
+bool HashString::VerifyFile(std::string filename) const			/*{{{*/
+{
+   std::string fileHash = GetHashForFile(filename);
+
+   if(_config->FindB("Debug::Hashes",false) == true)
+      std::clog << "HashString::VerifyFile: got: " << fileHash << " expected: " << toStr() << std::endl;
+
+   return (fileHash == Hash);
+}
+									/*}}}*/
+bool HashString::FromFile(std::string filename)          		/*{{{*/
 {
-   FileFd fd;
-   MD5Summation MD5;
-   SHA1Summation SHA1;
-   SHA256Summation SHA256;
-   string fileHash;
+   // pick the strongest hash
+   if (Type == "")
+      Type = _SupportedHashes[0];
+
+   Hash = GetHashForFile(filename);
+   return true;
+}
+									/*}}}*/
+std::string HashString::GetHashForFile(std::string filename) const      /*{{{*/
+{
+   std::string fileHash;
 
    FileFd Fd(filename, FileFd::ReadOnly);
-   if(Type == "MD5Sum") 
+   if(strcasecmp(Type.c_str(), "MD5Sum") == 0)
    {
-      MD5.AddFD(Fd.Fd(), Fd.Size());
-      fileHash = (string)MD5.Result();
-   } 
-   else if (Type == "SHA1")
+      MD5Summation MD5;
+      MD5.AddFD(Fd);
+      fileHash = (std::string)MD5.Result();
+   }
+   else if (strcasecmp(Type.c_str(), "SHA1") == 0)
+   {
+      SHA1Summation SHA1;
+      SHA1.AddFD(Fd);
+      fileHash = (std::string)SHA1.Result();
+   }
+   else if (strcasecmp(Type.c_str(), "SHA256") == 0)
    {
-      SHA1.AddFD(Fd.Fd(), Fd.Size());
-      fileHash = (string)SHA1.Result();
-   } 
-   else if (Type == "SHA256") 
+      SHA256Summation SHA256;
+      SHA256.AddFD(Fd);
+      fileHash = (std::string)SHA256.Result();
+   }
+   else if (strcasecmp(Type.c_str(), "SHA512") == 0)
    {
-      SHA256.AddFD(Fd.Fd(), Fd.Size());
-      fileHash = (string)SHA256.Result();
+      SHA512Summation SHA512;
+      SHA512.AddFD(Fd);
+      fileHash = (std::string)SHA512.Result();
    }
    Fd.Close();
 
-   if(_config->FindB("Debug::Hashes",false) == true)
-      std::clog << "HashString::VerifyFile: got: " << fileHash << " expected: " << toStr() << std::endl;
-
-   return (fileHash == Hash);
+   return fileHash;
 }
 									/*}}}*/
-const char** HashString::SupportedHashes()
+const char** HashString::SupportedHashes()				/*{{{*/
 {
    return _SupportedHashes;
 }
-
-bool HashString::empty() const
+									/*}}}*/
+APT_PURE bool HashString::empty() const					/*{{{*/
 {
    return (Type.empty() || Hash.empty());
 }
+									/*}}}*/
+std::string HashString::toStr() const					/*{{{*/
+{
+   return Type + ":" + Hash;
+}
+									/*}}}*/
+APT_PURE bool HashString::operator==(HashString const &other) const	/*{{{*/
+{
+   return (strcasecmp(Type.c_str(), other.Type.c_str()) == 0 && Hash == other.Hash);
+}
+APT_PURE bool HashString::operator!=(HashString const &other) const
+{
+   return !(*this == other);
+}
+									/*}}}*/
 
-string HashString::toStr() const
+bool HashStringList::usable() const					/*{{{*/
 {
-   return Type+string(":")+Hash;
+   if (empty() == true)
+      return false;
+   std::string const forcedType = _config->Find("Acquire::ForceHash", "");
+   if (forcedType.empty() == true)
+      return true;
+   return find(forcedType) != NULL;
 }
+									/*}}}*/
+HashString const * HashStringList::find(char const * const type) const /*{{{*/
+{
+   if (type == NULL || type[0] == '\0')
+   {
+      std::string const forcedType = _config->Find("Acquire::ForceHash", "");
+      if (forcedType.empty() == false)
+	 return find(forcedType.c_str());
+      for (char const * const * t = HashString::SupportedHashes(); *t != NULL; ++t)
+	 for (std::vector<HashString>::const_iterator hs = list.begin(); hs != list.end(); ++hs)
+	    if (strcasecmp(hs->HashType().c_str(), *t) == 0)
+	       return &*hs;
+      return NULL;
+   }
+   for (std::vector<HashString>::const_iterator hs = list.begin(); hs != list.end(); ++hs)
+      if (strcasecmp(hs->HashType().c_str(), type) == 0)
+	 return &*hs;
+   return NULL;
+}
+									/*}}}*/
+bool HashStringList::supported(char const * const type)			/*{{{*/
+{
+   for (char const * const * t = HashString::SupportedHashes(); *t != NULL; ++t)
+      if (strcasecmp(*t, type) == 0)
+	 return true;
+   return false;
+}
+									/*}}}*/
+bool HashStringList::push_back(const HashString &hashString)		/*{{{*/
+{
+   if (hashString.HashType().empty() == true ||
+	 hashString.HashValue().empty() == true ||
+	 supported(hashString.HashType().c_str()) == false)
+      return false;
+
+   // ensure that each type is added only once
+   HashString const * const hs = find(hashString.HashType().c_str());
+   if (hs != NULL)
+      return *hs == hashString;
 
-// Hashes::AddFD - Add the contents of the FD				/*{{{*/
-// ---------------------------------------------------------------------
-/* */
-bool Hashes::AddFD(int Fd,unsigned long Size)
+   list.push_back(hashString);
+   return true;
+}
+									/*}}}*/
+bool HashStringList::VerifyFile(std::string filename) const		/*{{{*/
+{
+   if (list.empty() == true)
+      return false;
+   HashString const * const hs = find(NULL);
+   if (hs == NULL || hs->VerifyFile(filename) == false)
+      return false;
+   return true;
+}
+									/*}}}*/
+bool HashStringList::operator==(HashStringList const &other) const	/*{{{*/
+{
+   std::string const forcedType = _config->Find("Acquire::ForceHash", "");
+   if (forcedType.empty() == false)
+   {
+      HashString const * const hs = other.find(forcedType);
+      HashString const * const ohs = other.find(forcedType);
+      if (hs == NULL || ohs == NULL)
+	 return false;
+      return hs == ohs;
+   }
+   short matches = 0;
+   for (const_iterator hs = begin(); hs != end(); ++hs)
+   {
+      HashString const * const ohs = other.find(hs->HashType());
+      if (ohs == NULL)
+	 continue;
+      if (*hs != *ohs)
+	 return false;
+      ++matches;
+   }
+   if (matches == 0)
+      return false;
+   return true;
+}
+bool HashStringList::operator!=(HashStringList const &other) const
+{
+   return !(*this == other);
+}
+									/*}}}*/
+
+// Hashes::Add* - Add the contents of data or FD			/*{{{*/
+bool Hashes::Add(const unsigned char * const Data,unsigned long long const Size, unsigned int const Hashes)
+{
+   bool Res = true;
+#if __GNUC__ >= 4
+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+   if ((Hashes & MD5SUM) == MD5SUM)
+      Res &= MD5.Add(Data, Size);
+   if ((Hashes & SHA1SUM) == SHA1SUM)
+      Res &= SHA1.Add(Data, Size);
+   if ((Hashes & SHA256SUM) == SHA256SUM)
+      Res &= SHA256.Add(Data, Size);
+   if ((Hashes & SHA512SUM) == SHA512SUM)
+      Res &= SHA512.Add(Data, Size);
+#if __GNUC__ >= 4
+	#pragma GCC diagnostic pop
+#endif
+   return Res;
+}
+bool Hashes::AddFD(int const Fd,unsigned long long Size, unsigned int const Hashes)
 {
    unsigned char Buf[64*64];
-   int Res = 0;
-   int ToEOF = (Size == 0);
+   bool const ToEOF = (Size == UntilEOF);
    while (Size != 0 || ToEOF)
    {
-      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;
+      unsigned long long n = sizeof(Buf);
+      if (!ToEOF) n = std::min(Size, n);
+      ssize_t const Res = read(Fd,Buf,n);
+      if (Res < 0 || (!ToEOF && Res != (ssize_t) n)) // error, or short read
+	 return false;
       if (ToEOF && Res == 0) // EOF
-         break;
+	 break;
       Size -= Res;
-      MD5.Add(Buf,Res);
-      SHA1.Add(Buf,Res);
-      SHA256.Add(Buf,Res);
+      if (Add(Buf, Res, Hashes) == false)
+	 return false;
+   }
+   return true;
+}
+bool Hashes::AddFD(FileFd &Fd,unsigned long long Size, unsigned int const Hashes)
+{
+   unsigned char Buf[64*64];
+   bool const ToEOF = (Size == 0);
+   while (Size != 0 || ToEOF)
+   {
+      unsigned long long n = sizeof(Buf);
+      if (!ToEOF) n = std::min(Size, n);
+      unsigned long long a = 0;
+      if (Fd.Read(Buf, n, &a) == false) // error
+	 return false;
+      if (ToEOF == false)
+      {
+	 if (a != n) // short read
+	    return false;
+      }
+      else if (a == 0) // EOF
+	 break;
+      Size -= a;
+      if (Add(Buf, a, Hashes) == false)
+	 return false;
    }
    return true;
 }
 									/*}}}*/
-
+HashStringList Hashes::GetHashStringList()
+{
+   HashStringList hashes;
+#if __GNUC__ >= 4
+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+   hashes.push_back(HashString("MD5Sum", MD5.Result().Value()));
+   hashes.push_back(HashString("SHA1", SHA1.Result().Value()));
+   hashes.push_back(HashString("SHA256", SHA256.Result().Value()));
+   hashes.push_back(HashString("SHA512", SHA512.Result().Value()));
+#if __GNUC__ >= 4
+	#pragma GCC diagnostic pop
+#endif
+   return hashes;
+}
+#if __GNUC__ >= 4
+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+	#pragma GCC diagnostic ignored "-Wsuggest-attribute=const"
+#endif
+Hashes::Hashes() {}
+Hashes::~Hashes() {}
+#if __GNUC__ >= 4
+	#pragma GCC diagnostic pop
+#endif