X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/e5fefea6ec93746376bf42733ee84a9fafeab764..d27daedb6a0bf672508072100f20233d08ccf0e0:/apt-pkg/contrib/hashes.cc diff --git a/apt-pkg/contrib/hashes.cc b/apt-pkg/contrib/hashes.cc index 199e395f6..5c0023dc7 100644 --- a/apt-pkg/contrib/hashes.cc +++ b/apt-pkg/contrib/hashes.cc @@ -23,13 +23,14 @@ #include <stddef.h> #include <algorithm> #include <unistd.h> +#include <stdlib.h> #include <string> #include <iostream> /*}}}*/ const char * HashString::_SupportedHashes[] = { - "SHA512", "SHA256", "SHA1", "MD5Sum", NULL + "SHA512", "SHA256", "SHA1", "MD5Sum", "Checksum-FileSize", NULL }; HashString::HashString() @@ -111,6 +112,8 @@ std::string HashString::GetHashForFile(std::string filename) const /*{{{*/ 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; @@ -126,6 +129,14 @@ APT_PURE bool HashString::empty() const /*{{{*/ return (Type.empty() || Hash.empty()); } /*}}}*/ +APT_PURE bool HashString::usable() const /*{{{*/ +{ + return ( + (Type != "Checksum-FileSize") && + (Type != "MD5Sum") + ); +} + /*}}}*/ std::string HashString::toStr() const /*{{{*/ { return Type + ":" + Hash; @@ -147,7 +158,13 @@ bool HashStringList::usable() const /*{{{*/ return false; std::string const forcedType = _config->Find("Acquire::ForceHash", ""); if (forcedType.empty() == true) - return 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; } /*}}}*/ @@ -170,6 +187,22 @@ HashString const * HashStringList::find(char const * const type) const /*{{{*/ 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) @@ -196,12 +229,22 @@ bool HashStringList::push_back(const HashString &hashString) /*{{{*/ /*}}}*/ bool HashStringList::VerifyFile(std::string filename) const /*{{{*/ { - if (list.empty() == true) + if (usable() == false) return false; - HashString const * const hs = find(NULL); - if (hs == NULL || hs->VerifyFile(filename) == false) - return false; - return true; + + 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 /*{{{*/ @@ -209,11 +252,11 @@ 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 hs = find(forcedType); HashString const * const ohs = other.find(forcedType); if (hs == NULL || ohs == NULL) return false; - return hs == ohs; + return *hs == *ohs; } short matches = 0; for (const_iterator hs = begin(); hs != end(); ++hs) @@ -235,28 +278,50 @@ bool HashStringList::operator!=(HashStringList const &other) const } /*}}}*/ +// 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, unsigned int const Hashes) +bool Hashes::Add(const unsigned char * const Data, unsigned long long const Size) { bool Res = true; -#if __GNUC__ >= 4 - #pragma GCC diagnostic push - #pragma GCC diagnostic ignored "-Wdeprecated-declarations" -#endif - if ((Hashes & MD5SUM) == MD5SUM) +APT_IGNORE_DEPRECATED_PUSH + if ((d->CalcHashes & MD5SUM) == MD5SUM) Res &= MD5.Add(Data, Size); - if ((Hashes & SHA1SUM) == SHA1SUM) + if ((d->CalcHashes & SHA1SUM) == SHA1SUM) Res &= SHA1.Add(Data, Size); - if ((Hashes & SHA256SUM) == SHA256SUM) + if ((d->CalcHashes & SHA256SUM) == SHA256SUM) Res &= SHA256.Add(Data, Size); - if ((Hashes & SHA512SUM) == SHA512SUM) + if ((d->CalcHashes & SHA512SUM) == SHA512SUM) Res &= SHA512.Add(Data, Size); -#if __GNUC__ >= 4 - #pragma GCC diagnostic pop -#endif +APT_IGNORE_DEPRECATED_POP + d->FileSize += Size; return Res; } -bool Hashes::AddFD(int const Fd,unsigned long long Size, unsigned int const Hashes) +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); @@ -270,12 +335,17 @@ bool Hashes::AddFD(int const Fd,unsigned long long Size, unsigned int const Hash if (ToEOF && Res == 0) // EOF break; Size -= Res; - if (Add(Buf, Res, Hashes) == false) + if (Add(Buf, Res) == false) return false; } return true; } -bool Hashes::AddFD(FileFd &Fd,unsigned long long Size, unsigned int const Hashes) +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); @@ -294,35 +364,36 @@ bool Hashes::AddFD(FileFd &Fd,unsigned long long Size, unsigned int const Hashes else if (a == 0) // EOF break; Size -= a; - if (Add(Buf, a, Hashes) == false) + 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; -#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 +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; } -#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 +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