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

// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
// $Id: hashes.cc,v 1.1 2001/03/06 07:15:29 jgg Exp $
/* ######################################################################

   Hashes - Simple wrapper around the hash functions
   
   This is just used to make building the methods simpler, this is the
   only interface required..
   
   ##################################################################### */
									/*}}}*/
// Include Files							/*{{{*/
#include <config.h>

#include <apt-pkg/hashes.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/configuration.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 <stdlib.h>
#include <string>
#include <iostream>
									/*}}}*/

const char * HashString::_SupportedHashes[] =
{
   "SHA512", "SHA256", "SHA1", "MD5Sum", "Checksum-FileSize", NULL
};

HashString::HashString()
{
}

HashString::HashString(std::string Type, std::string Hash) : Type(Type), Hash(Hash)
{
}

HashString::HashString(std::string StringedHash)			/*{{{*/
{
   if (StringedHash.find(":") == std::string::npos)
   {
      // 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;
   }
   std::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(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)          		/*{{{*/
{
   // 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(strcasecmp(Type.c_str(), "MD5Sum") == 0)
   {
      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)
   {
      SHA256Summation SHA256;
      SHA256.AddFD(Fd);
      fileHash = (std::string)SHA256.Result();
   }
   else if (strcasecmp(Type.c_str(), "SHA512") == 0)
   {
      SHA512Summation SHA512;
      SHA512.AddFD(Fd);
      fileHash = (std::string)SHA512.Result();
   }
   else if (strcasecmp(Type.c_str(), "Checksum-FileSize") == 0)
      strprintf(fileHash, "%llu", Fd.FileSize());
   Fd.Close();

   return fileHash;
}
									/*}}}*/
const char** HashString::SupportedHashes()				/*{{{*/
{
   return _SupportedHashes;
}
									/*}}}*/
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);
}
									/*}}}*/

bool HashStringList::usable() const					/*{{{*/
{
   if (empty() == true)
      return false;
   std::string const forcedType = _config->Find("Acquire::ForceHash", "");
   if (forcedType.empty() == true)
   {
      // FileSize alone isn't usable
      for (std::vector<HashString>::const_iterator hs = list.begin(); hs != list.end(); ++hs)
	 if (hs->HashType() != "Checksum-FileSize")
	    return true;
      return false;
   }
   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;
}
									/*}}}*/
unsigned long long HashStringList::FileSize() const			/*{{{*/
{
   HashString const * const hsf = find("Checksum-FileSize");
   if (hsf == NULL)
      return 0;
   std::string const hv = hsf->HashValue();
   return strtoull(hv.c_str(), NULL, 10);
}
									/*}}}*/
bool HashStringList::FileSize(unsigned long long const Size)		/*{{{*/
{
   std::string size;
   strprintf(size, "%llu", Size);
   return push_back(HashString("Checksum-FileSize", size));
}
									/*}}}*/
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;

   list.push_back(hashString);
   return true;
}
									/*}}}*/
bool HashStringList::VerifyFile(std::string filename) const		/*{{{*/
{
   if (usable() == false)
      return false;

   Hashes hashes(*this);
   FileFd file(filename, FileFd::ReadOnly);
   HashString const * const hsf = find("Checksum-FileSize");
   if (hsf != NULL)
   {
      std::string fileSize;
      strprintf(fileSize, "%llu", file.FileSize());
      if (hsf->HashValue() != fileSize)
	 return false;
   }
   hashes.AddFD(file);
   HashStringList const hsl = hashes.GetHashStringList();
   return hsl == *this;
}
									/*}}}*/
bool HashStringList::operator==(HashStringList const &other) const	/*{{{*/
{
   std::string const forcedType = _config->Find("Acquire::ForceHash", "");
   if (forcedType.empty() == false)
   {
      HashString const * const hs = 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);
}
									/*}}}*/

// PrivateHashes							/*{{{*/
class PrivateHashes {
public:
   unsigned long long FileSize;
   unsigned int CalcHashes;

   explicit PrivateHashes(unsigned int const CalcHashes) : FileSize(0), CalcHashes(CalcHashes) {}
   explicit PrivateHashes(HashStringList const &Hashes) : FileSize(0) {
      unsigned int calcHashes = Hashes.usable() ? 0 : ~0;
      if (Hashes.find("MD5Sum") != NULL)
	 calcHashes |= Hashes::MD5SUM;
      if (Hashes.find("SHA1") != NULL)
	 calcHashes |= Hashes::SHA1SUM;
      if (Hashes.find("SHA256") != NULL)
	 calcHashes |= Hashes::SHA256SUM;
      if (Hashes.find("SHA512") != NULL)
	 calcHashes |= Hashes::SHA512SUM;
      CalcHashes = calcHashes;
   }
};
									/*}}}*/
// Hashes::Add* - Add the contents of data or FD			/*{{{*/
bool Hashes::Add(const unsigned char * const Data, unsigned long long const Size)
{
   bool Res = true;
APT_IGNORE_DEPRECATED_PUSH
   if ((d->CalcHashes & MD5SUM) == MD5SUM)
      Res &= MD5.Add(Data, Size);
   if ((d->CalcHashes & SHA1SUM) == SHA1SUM)
      Res &= SHA1.Add(Data, Size);
   if ((d->CalcHashes & SHA256SUM) == SHA256SUM)
      Res &= SHA256.Add(Data, Size);
   if ((d->CalcHashes & SHA512SUM) == SHA512SUM)
      Res &= SHA512.Add(Data, Size);
APT_IGNORE_DEPRECATED_POP
   d->FileSize += Size;
   return Res;
}
bool Hashes::Add(const unsigned char * const Data, unsigned long long const Size, unsigned int const Hashes)
{
   d->CalcHashes = Hashes;
   return Add(Data, Size);
}
bool Hashes::AddFD(int const Fd,unsigned long long Size)
{
   unsigned char Buf[64*64];
   bool const ToEOF = (Size == UntilEOF);
   while (Size != 0 || ToEOF)
   {
      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;
      Size -= Res;
      if (Add(Buf, Res) == false)
	 return false;
   }
   return true;
}
bool Hashes::AddFD(int const Fd,unsigned long long Size, unsigned int const Hashes)
{
   d->CalcHashes = Hashes;
   return AddFD(Fd, Size);
}
bool Hashes::AddFD(FileFd &Fd,unsigned long long Size)
{
   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) == false)
	 return false;
   }
   return true;
}
bool Hashes::AddFD(FileFd &Fd,unsigned long long Size, unsigned int const Hashes)
{
   d->CalcHashes = Hashes;
   return AddFD(Fd, Size);
}
									/*}}}*/
HashStringList Hashes::GetHashStringList()
{
   HashStringList hashes;
APT_IGNORE_DEPRECATED_PUSH
   if ((d->CalcHashes & MD5SUM) == MD5SUM)
      hashes.push_back(HashString("MD5Sum", MD5.Result().Value()));
   if ((d->CalcHashes & SHA1SUM) == SHA1SUM)
      hashes.push_back(HashString("SHA1", SHA1.Result().Value()));
   if ((d->CalcHashes & SHA256SUM) == SHA256SUM)
      hashes.push_back(HashString("SHA256", SHA256.Result().Value()));
   if ((d->CalcHashes & SHA512SUM) == SHA512SUM)
      hashes.push_back(HashString("SHA512", SHA512.Result().Value()));
APT_IGNORE_DEPRECATED_POP
   hashes.FileSize(d->FileSize);
   return hashes;
}
APT_IGNORE_DEPRECATED_PUSH
Hashes::Hashes() : d(new PrivateHashes(~0)) { }
Hashes::Hashes(unsigned int const Hashes) : d(new PrivateHashes(Hashes)) {}
Hashes::Hashes(HashStringList const &Hashes) : d(new PrivateHashes(Hashes)) {}
Hashes::~Hashes() { delete d; }
APT_IGNORE_DEPRECATED_POP
Commit	Line	Data
63b1700f AL	1	// -- mode: cpp; mode: fold --
	2	// Description /{{{/
	3	// $Id: hashes.cc,v 1.1 2001/03/06 07:15:29 jgg Exp $
	4	/* ######################################################################
	5
	6	Hashes - Simple wrapper around the hash functions
	7
	8	This is just used to make building the methods simpler, this is the
	9	only interface required..
	10
	11	##################################################################### */
	12	/}}}/
	13	// Include Files /{{{/
ea542140 DK	14	#include <config.h>
ea542140 DK	15
63b1700f	16	#include <apt-pkg/hashes.h>
495e5cb2 MV	17	#include <apt-pkg/fileutl.h>
495e5cb2 MV	18	#include <apt-pkg/configuration.h>
453b82a3 DK	19	#include <apt-pkg/md5.h>
	20	#include <apt-pkg/sha1.h>
	21	#include <apt-pkg/sha2.h>
aea7f4c8	22
453b82a3 DK	23	#include <stddef.h>
453b82a3 DK	24	#include <algorithm>
ea542140	25	#include <unistd.h>
448c38bd	26	#include <stdlib.h>
495e5cb2 MV	27	#include <string>
495e5cb2 MV	28	#include <iostream>
63b1700f AL	29	/}}}/
63b1700f AL	30
f4c3850e	31	const char * HashString::_SupportedHashes[] =
495e5cb2	32	{
23397c9d	33	"SHA512", "SHA256", "SHA1", "MD5Sum", "Checksum-FileSize", NULL
495e5cb2 MV	34	};
	35
	36	HashString::HashString()
	37	{
	38	}
	39
8f3ba4e8	40	HashString::HashString(std::string Type, std::string Hash) : Type(Type), Hash(Hash)
495e5cb2 MV	41	{
	42	}
	43
8f3ba4e8	44	HashString::HashString(std::string StringedHash) /{{{/
495e5cb2	45	{
f4c3850e	46	if (StringedHash.find(":") == std::string::npos)
495e5cb2	47	{
f4c3850e DK	48	// legacy: md5sum without "MD5Sum:" prefix
	49	if (StringedHash.size() == 32)
	50	{
	51	Type = "MD5Sum";
	52	Hash = StringedHash;
	53	}
	54	if(_config->FindB("Debug::Hashes",false) == true)
	55	std::clog << "HashString(string): invalid StringedHash " << StringedHash << std::endl;
495e5cb2 MV	56	return;
495e5cb2 MV	57	}
8f3ba4e8	58	std::string::size_type pos = StringedHash.find(":");
8a8feb29	59	Type = StringedHash.substr(0,pos);
495e5cb2 MV	60	Hash = StringedHash.substr(pos+1, StringedHash.size() - pos);
	61
	62	if(_config->FindB("Debug::Hashes",false) == true)
	63	std::clog << "HashString(string): " << Type << " : " << Hash << std::endl;
	64	}
92fcbfc1	65	/}}}/
8f3ba4e8	66	bool HashString::VerifyFile(std::string filename) const /{{{/
e6645b9f MV	67	{
	68	std::string fileHash = GetHashForFile(filename);
	69
	70	if(_config->FindB("Debug::Hashes",false) == true)
	71	std::clog << "HashString::VerifyFile: got: " << fileHash << " expected: " << toStr() << std::endl;
	72
	73	return (fileHash == Hash);
	74	}
	75	/}}}/
	76	bool HashString::FromFile(std::string filename) /{{{/
	77	{
	78	// pick the strongest hash
	79	if (Type == "")
	80	Type = _SupportedHashes[0];
	81
	82	Hash = GetHashForFile(filename);
	83	return true;
	84	}
	85	/}}}/
	86	std::string HashString::GetHashForFile(std::string filename) const /{{{/
495e5cb2	87	{
8f3ba4e8	88	std::string fileHash;
495e5cb2 MV	89
495e5cb2 MV	90	FileFd Fd(filename, FileFd::ReadOnly);
f4c3850e	91	if(strcasecmp(Type.c_str(), "MD5Sum") == 0)
495e5cb2	92	{
2dcf7b8f	93	MD5Summation MD5;
109eb151	94	MD5.AddFD(Fd);
8f3ba4e8	95	fileHash = (std::string)MD5.Result();
2dcf7b8f	96	}
f4c3850e	97	else if (strcasecmp(Type.c_str(), "SHA1") == 0)
495e5cb2	98	{
2dcf7b8f	99	SHA1Summation SHA1;
109eb151	100	SHA1.AddFD(Fd);
8f3ba4e8	101	fileHash = (std::string)SHA1.Result();
2dcf7b8f	102	}
f4c3850e	103	else if (strcasecmp(Type.c_str(), "SHA256") == 0)
495e5cb2	104	{
2dcf7b8f	105	SHA256Summation SHA256;
109eb151	106	SHA256.AddFD(Fd);
8f3ba4e8	107	fileHash = (std::string)SHA256.Result();
495e5cb2	108	}
f4c3850e	109	else if (strcasecmp(Type.c_str(), "SHA512") == 0)
d9b9e9e2	110	{
2dcf7b8f	111	SHA512Summation SHA512;
109eb151	112	SHA512.AddFD(Fd);
8f3ba4e8	113	fileHash = (std::string)SHA512.Result();
d9b9e9e2	114	}
23397c9d DK	115	else if (strcasecmp(Type.c_str(), "Checksum-FileSize") == 0)
23397c9d DK	116	strprintf(fileHash, "%llu", Fd.FileSize());
495e5cb2 MV	117	Fd.Close();
495e5cb2 MV	118
e6645b9f	119	return fileHash;
495e5cb2	120	}
92fcbfc1	121	/}}}/
f4c3850e	122	const char** HashString::SupportedHashes() /{{{/
495e5cb2 MV	123	{
	124	return _SupportedHashes;
	125	}
f4c3850e DK	126	/}}}/
f4c3850e DK	127	APT_PURE bool HashString::empty() const /{{{/
495e5cb2 MV	128	{
	129	return (Type.empty() \|\| Hash.empty());
	130	}
f4c3850e DK	131	/}}}/
	132	std::string HashString::toStr() const /{{{/
	133	{
	134	return Type + ":" + Hash;
	135	}
	136	/}}}/
	137	APT_PURE bool HashString::operator==(HashString const &other) const /{{{/
	138	{
	139	return (strcasecmp(Type.c_str(), other.Type.c_str()) == 0 && Hash == other.Hash);
	140	}
	141	APT_PURE bool HashString::operator!=(HashString const &other) const
	142	{
	143	return !(*this == other);
	144	}
	145	/}}}/
	146
b3501edb DK	147	bool HashStringList::usable() const /{{{/
	148	{
	149	if (empty() == true)
	150	return false;
	151	std::string const forcedType = _config->Find("Acquire::ForceHash", "");
	152	if (forcedType.empty() == true)
23397c9d DK	153	{
	154	// FileSize alone isn't usable
	155	for (std::vector<HashString>::const_iterator hs = list.begin(); hs != list.end(); ++hs)
	156	if (hs->HashType() != "Checksum-FileSize")
	157	return true;
	158	return false;
	159	}
b3501edb DK	160	return find(forcedType) != NULL;
	161	}
	162	/}}}/
f4c3850e DK	163	HashString const * HashStringList::find(char const * const type) const /{{{/
	164	{
	165	if (type == NULL \|\| type[0] == '\0')
	166	{
b3501edb	167	std::string const forcedType = _config->Find("Acquire::ForceHash", "");
f4c3850e DK	168	if (forcedType.empty() == false)
	169	return find(forcedType.c_str());
	170	for (char const * const * t = HashString::SupportedHashes(); *t != NULL; ++t)
	171	for (std::vector<HashString>::const_iterator hs = list.begin(); hs != list.end(); ++hs)
	172	if (strcasecmp(hs->HashType().c_str(), *t) == 0)
	173	return &*hs;
	174	return NULL;
	175	}
	176	for (std::vector<HashString>::const_iterator hs = list.begin(); hs != list.end(); ++hs)
	177	if (strcasecmp(hs->HashType().c_str(), type) == 0)
	178	return &*hs;
	179	return NULL;
	180	}
	181	/}}}/
448c38bd DK	182	unsigned long long HashStringList::FileSize() const /{{{/
	183	{
	184	HashString const * const hsf = find("Checksum-FileSize");
	185	if (hsf == NULL)
	186	return 0;
	187	std::string const hv = hsf->HashValue();
	188	return strtoull(hv.c_str(), NULL, 10);
	189	}
	190	/}}}/
4f51fd86 DK	191	bool HashStringList::FileSize(unsigned long long const Size) /{{{/
	192	{
	193	std::string size;
	194	strprintf(size, "%llu", Size);
	195	return push_back(HashString("Checksum-FileSize", size));
	196	}
	197	/}}}/
f4c3850e DK	198	bool HashStringList::supported(char const * const type) /{{{/
	199	{
	200	for (char const * const * t = HashString::SupportedHashes(); *t != NULL; ++t)
	201	if (strcasecmp(*t, type) == 0)
	202	return true;
	203	return false;
	204	}
	205	/}}}/
	206	bool HashStringList::push_back(const HashString &hashString) /{{{/
	207	{
	208	if (hashString.HashType().empty() == true \|\|
	209	hashString.HashValue().empty() == true \|\|
	210	supported(hashString.HashType().c_str()) == false)
	211	return false;
495e5cb2	212
f4c3850e DK	213	// ensure that each type is added only once
	214	HashString const * const hs = find(hashString.HashType().c_str());
	215	if (hs != NULL)
	216	return *hs == hashString;
	217
	218	list.push_back(hashString);
	219	return true;
	220	}
	221	/}}}/
	222	bool HashStringList::VerifyFile(std::string filename) const /{{{/
	223	{
495b7a61	224	if (usable() == false)
f4c3850e	225	return false;
495b7a61 DK	226
	227	Hashes hashes(*this);
	228	FileFd file(filename, FileFd::ReadOnly);
23397c9d	229	HashString const * const hsf = find("Checksum-FileSize");
495b7a61 DK	230	if (hsf != NULL)
	231	{
	232	std::string fileSize;
	233	strprintf(fileSize, "%llu", file.FileSize());
	234	if (hsf->HashValue() != fileSize)
	235	return false;
	236	}
	237	hashes.AddFD(file);
	238	HashStringList const hsl = hashes.GetHashStringList();
	239	return hsl == *this;
f4c3850e DK	240	}
	241	/}}}/
	242	bool HashStringList::operator==(HashStringList const &other) const /{{{/
495e5cb2	243	{
b3501edb DK	244	std::string const forcedType = _config->Find("Acquire::ForceHash", "");
	245	if (forcedType.empty() == false)
	246	{
f6d4ab9a	247	HashString const * const hs = find(forcedType);
b3501edb DK	248	HashString const * const ohs = other.find(forcedType);
	249	if (hs == NULL \|\| ohs == NULL)
	250	return false;
f6d4ab9a	251	return hs == ohs;
b3501edb	252	}
f4c3850e DK	253	short matches = 0;
	254	for (const_iterator hs = begin(); hs != end(); ++hs)
	255	{
	256	HashString const * const ohs = other.find(hs->HashType());
	257	if (ohs == NULL)
	258	continue;
	259	if (hs != ohs)
	260	return false;
	261	++matches;
	262	}
	263	if (matches == 0)
	264	return false;
	265	return true;
	266	}
	267	bool HashStringList::operator!=(HashStringList const &other) const
	268	{
	269	return !(*this == other);
495e5cb2	270	}
f4c3850e	271	/}}}/
495e5cb2	272
23397c9d DK	273	// PrivateHashes /{{{/
	274	class PrivateHashes {
	275	public:
	276	unsigned long long FileSize;
9224ce3d	277	unsigned int CalcHashes;
23397c9d	278
e8afd168	279	explicit PrivateHashes(unsigned int const CalcHashes) : FileSize(0), CalcHashes(CalcHashes) {}
6c55f07a DK	280	explicit PrivateHashes(HashStringList const &Hashes) : FileSize(0) {
	281	unsigned int calcHashes = Hashes.usable() ? 0 : ~0;
	282	if (Hashes.find("MD5Sum") != NULL)
	283	calcHashes \|= Hashes::MD5SUM;
	284	if (Hashes.find("SHA1") != NULL)
	285	calcHashes \|= Hashes::SHA1SUM;
	286	if (Hashes.find("SHA256") != NULL)
	287	calcHashes \|= Hashes::SHA256SUM;
	288	if (Hashes.find("SHA512") != NULL)
	289	calcHashes \|= Hashes::SHA512SUM;
	290	CalcHashes = calcHashes;
	291	}
23397c9d DK	292	};
23397c9d DK	293	/}}}/
b3501edb	294	// Hashes::Add* - Add the contents of data or FD /{{{/
9224ce3d	295	bool Hashes::Add(const unsigned char * const Data, unsigned long long const Size)
b3501edb DK	296	{
b3501edb DK	297	bool Res = true;
586d8704	298	APT_IGNORE_DEPRECATED_PUSH
9224ce3d	299	if ((d->CalcHashes & MD5SUM) == MD5SUM)
b3501edb	300	Res &= MD5.Add(Data, Size);
9224ce3d	301	if ((d->CalcHashes & SHA1SUM) == SHA1SUM)
b3501edb	302	Res &= SHA1.Add(Data, Size);
9224ce3d	303	if ((d->CalcHashes & SHA256SUM) == SHA256SUM)
b3501edb	304	Res &= SHA256.Add(Data, Size);
9224ce3d	305	if ((d->CalcHashes & SHA512SUM) == SHA512SUM)
b3501edb	306	Res &= SHA512.Add(Data, Size);
586d8704	307	APT_IGNORE_DEPRECATED_POP
23397c9d	308	d->FileSize += Size;
b3501edb DK	309	return Res;
b3501edb DK	310	}
9224ce3d DK	311	bool Hashes::Add(const unsigned char * const Data, unsigned long long const Size, unsigned int const Hashes)
	312	{
	313	d->CalcHashes = Hashes;
	314	return Add(Data, Size);
	315	}
	316	bool Hashes::AddFD(int const Fd,unsigned long long Size)
63b1700f AL	317	{
63b1700f AL	318	unsigned char Buf[64*64];
ce928105	319	bool const ToEOF = (Size == UntilEOF);
04f4e1a3	320	while (Size != 0 \|\| ToEOF)
63b1700f	321	{
650faab0	322	unsigned long long n = sizeof(Buf);
8f3ba4e8	323	if (!ToEOF) n = std::min(Size, n);
9ce3cfc9	324	ssize_t const Res = read(Fd,Buf,n);
650faab0	325	if (Res < 0 \|\| (!ToEOF && Res != (ssize_t) n)) // error, or short read
1dab797c	326	return false;
04f4e1a3	327	if (ToEOF && Res == 0) // EOF
1dab797c	328	break;
63b1700f	329	Size -= Res;
9224ce3d	330	if (Add(Buf, Res) == false)
b3501edb	331	return false;
63b1700f AL	332	}
63b1700f AL	333	return true;
109eb151	334	}
9224ce3d DK	335	bool Hashes::AddFD(int const Fd,unsigned long long Size, unsigned int const Hashes)
	336	{
	337	d->CalcHashes = Hashes;
	338	return AddFD(Fd, Size);
	339	}
	340	bool Hashes::AddFD(FileFd &Fd,unsigned long long Size)
109eb151 DK	341	{
	342	unsigned char Buf[64*64];
	343	bool const ToEOF = (Size == 0);
	344	while (Size != 0 \|\| ToEOF)
	345	{
	346	unsigned long long n = sizeof(Buf);
	347	if (!ToEOF) n = std::min(Size, n);
	348	unsigned long long a = 0;
	349	if (Fd.Read(Buf, n, &a) == false) // error
	350	return false;
	351	if (ToEOF == false)
	352	{
	353	if (a != n) // short read
	354	return false;
	355	}
	356	else if (a == 0) // EOF
	357	break;
	358	Size -= a;
9224ce3d	359	if (Add(Buf, a) == false)
b3501edb	360	return false;
109eb151 DK	361	}
109eb151 DK	362	return true;
9224ce3d DK	363	}
	364	bool Hashes::AddFD(FileFd &Fd,unsigned long long Size, unsigned int const Hashes)
	365	{
	366	d->CalcHashes = Hashes;
	367	return AddFD(Fd, Size);
63b1700f AL	368	}
63b1700f AL	369	/}}}/
b3501edb DK	370	HashStringList Hashes::GetHashStringList()
	371	{
	372	HashStringList hashes;
586d8704	373	APT_IGNORE_DEPRECATED_PUSH
9224ce3d DK	374	if ((d->CalcHashes & MD5SUM) == MD5SUM)
	375	hashes.push_back(HashString("MD5Sum", MD5.Result().Value()));
	376	if ((d->CalcHashes & SHA1SUM) == SHA1SUM)
	377	hashes.push_back(HashString("SHA1", SHA1.Result().Value()));
	378	if ((d->CalcHashes & SHA256SUM) == SHA256SUM)
	379	hashes.push_back(HashString("SHA256", SHA256.Result().Value()));
	380	if ((d->CalcHashes & SHA512SUM) == SHA512SUM)
	381	hashes.push_back(HashString("SHA512", SHA512.Result().Value()));
586d8704	382	APT_IGNORE_DEPRECATED_POP
4f51fd86	383	hashes.FileSize(d->FileSize);
b3501edb DK	384	return hashes;
b3501edb DK	385	}
586d8704	386	APT_IGNORE_DEPRECATED_PUSH
6c55f07a DK	387	Hashes::Hashes() : d(new PrivateHashes(~0)) { }
	388	Hashes::Hashes(unsigned int const Hashes) : d(new PrivateHashes(Hashes)) {}
	389	Hashes::Hashes(HashStringList const &Hashes) : d(new PrivateHashes(Hashes)) {}
23397c9d	390	Hashes::~Hashes() { delete d; }
586d8704	391	APT_IGNORE_DEPRECATED_POP