+bool HashStringList::usable() const /*{{{*/
+{
+ if (empty() == true)
+ return false;
+ std::string const forcedType = _config->Find("Acquire::ForceHash", "");
+ if (forcedType.empty() == true)
+ {
+ // See if there is at least one usable hash
+ for (auto const &hs: list)
+ if (hs.usable())
+ 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)
+{
+ if (Size == 0)
+ return true;
+ 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)
projects / apt.git / blobdiff