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authorDavid Kalnischkies <kalnischkies@gmail.com>2013-08-18 23:17:05 +0200
committerDavid Kalnischkies <david@kalnischkies.de>2014-11-10 17:23:29 +0100
commit3f439e2b7126fb82952cd7bc12b8d6cb01352219 (patch)
tree4b40973346996a3a2dd9caaa48028d9408c0d615 /apt-pkg/contrib/hashes.cc
parent28460cb27846b2437010b08adf10bde18e370974 (diff)
add a simple container for HashStrings
APT supports more than just one HashString and even allows to enforce the usage of a specific hash. This class is intended to help with storage and passing around of the HashStrings. The cherry-pick here the un-const-ification of HashType() compared to f4c3850ea335545e297504941dc8c7a8f1c83358. The point of this commit is adding infrastructure for the next one. All by itself, it just adds new symbols. Git-Dch: Ignore
Diffstat (limited to 'apt-pkg/contrib/hashes.cc')
-rw-r--r--apt-pkg/contrib/hashes.cc118
1 files changed, 104 insertions, 14 deletions
diff --git a/apt-pkg/contrib/hashes.cc b/apt-pkg/contrib/hashes.cc
index 15f83615d..bb11a3fca 100644
--- a/apt-pkg/contrib/hashes.cc
+++ b/apt-pkg/contrib/hashes.cc
@@ -27,7 +27,7 @@
#include <iostream>
/*}}}*/
-const char* HashString::_SupportedHashes[] =
+const char * HashString::_SupportedHashes[] =
{
"SHA512", "SHA256", "SHA1", "MD5Sum", NULL
};
@@ -42,11 +42,16 @@ HashString::HashString(std::string Type, std::string Hash) : Type(Type), Hash(Ha
HashString::HashString(std::string StringedHash) /*{{{*/
{
- // legacy: md5sum without "MD5Sum:" prefix
- if (StringedHash.find(":") == std::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;
}
std::string::size_type pos = StringedHash.find(":");
@@ -82,25 +87,25 @@ 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)
{
MD5Summation MD5;
MD5.AddFD(Fd);
fileHash = (std::string)MD5.Result();
}
- else if (Type == "SHA1")
+ else if (strcasecmp(Type.c_str(), "SHA1") == 0)
{
SHA1Summation SHA1;
SHA1.AddFD(Fd);
fileHash = (std::string)SHA1.Result();
}
- else if (Type == "SHA256")
+ else if (strcasecmp(Type.c_str(), "SHA256") == 0)
{
SHA256Summation SHA256;
SHA256.AddFD(Fd);
fileHash = (std::string)SHA256.Result();
}
- else if (Type == "SHA512")
+ else if (strcasecmp(Type.c_str(), "SHA512") == 0)
{
SHA512Summation SHA512;
SHA512.AddFD(Fd);
@@ -111,20 +116,105 @@ std::string HashString::GetHashForFile(std::string filename) const /*{{{*/
return fileHash;
}
/*}}}*/
-const char** HashString::SupportedHashes()
+const char** HashString::SupportedHashes() /*{{{*/
{
return _SupportedHashes;
}
-
-APT_PURE 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);
+}
+ /*}}}*/
+
+HashString const * HashStringList::find(char const * const type) const /*{{{*/
+{
+ if (type == NULL || type[0] == '\0')
+ {
+ std::string 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;
-std::string HashString::toStr() const
+ list.push_back(hashString);
+ return true;
+}
+ /*}}}*/
+bool HashStringList::VerifyFile(std::string filename) const /*{{{*/
{
- return Type + std::string(":") + Hash;
+ 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 /*{{{*/
+{
+ 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::AddFD - Add the contents of the FD /*{{{*/
// ---------------------------------------------------------------------