diff options
Diffstat (limited to 'apt-pkg/contrib')
| -rw-r--r-- | apt-pkg/contrib/hashes.cc | 213 | ||||
| -rw-r--r-- | apt-pkg/contrib/hashes.h | 165 |
2 files changed, 321 insertions, 57 deletions
diff --git a/apt-pkg/contrib/hashes.cc b/apt-pkg/contrib/hashes.cc index 15f83615d..199e395f6 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); @@ -111,26 +116,147 @@ 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); +} + /*}}}*/ + +bool HashStringList::usable() const /*{{{*/ +{ + 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; -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 /*{{{*/ +{ + 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::AddFD - Add the contents of the FD /*{{{*/ -// --------------------------------------------------------------------- -/* */ -bool Hashes::AddFD(int const Fd,unsigned long long Size, bool const addMD5, - bool const addSHA1, bool const addSHA256, bool const addSHA512) +// 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]; bool const ToEOF = (Size == UntilEOF); @@ -144,19 +270,12 @@ bool Hashes::AddFD(int const Fd,unsigned long long Size, bool const addMD5, if (ToEOF && Res == 0) // EOF break; Size -= Res; - if (addMD5 == true) - MD5.Add(Buf,Res); - if (addSHA1 == true) - SHA1.Add(Buf,Res); - if (addSHA256 == true) - SHA256.Add(Buf,Res); - if (addSHA512 == true) - SHA512.Add(Buf,Res); + if (Add(Buf, Res, Hashes) == false) + return false; } return true; } -bool Hashes::AddFD(FileFd &Fd,unsigned long long Size, bool const addMD5, - bool const addSHA1, bool const addSHA256, bool const addSHA512) +bool Hashes::AddFD(FileFd &Fd,unsigned long long Size, unsigned int const Hashes) { unsigned char Buf[64*64]; bool const ToEOF = (Size == 0); @@ -175,15 +294,35 @@ bool Hashes::AddFD(FileFd &Fd,unsigned long long Size, bool const addMD5, else if (a == 0) // EOF break; Size -= a; - if (addMD5 == true) - MD5.Add(Buf, a); - if (addSHA1 == true) - SHA1.Add(Buf, a); - if (addSHA256 == true) - SHA256.Add(Buf, a); - if (addSHA512 == true) - SHA512.Add(Buf, 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 diff --git a/apt-pkg/contrib/hashes.h b/apt-pkg/contrib/hashes.h index 7a62f8a8f..caeba006d 100644 --- a/apt-pkg/contrib/hashes.h +++ b/apt-pkg/contrib/hashes.h @@ -17,6 +17,7 @@ #include <apt-pkg/md5.h> #include <apt-pkg/sha1.h> #include <apt-pkg/sha2.h> +#include <apt-pkg/macros.h> #include <cstring> #include <string> @@ -41,7 +42,7 @@ class HashString protected: std::string Type; std::string Hash; - static const char* _SupportedHashes[10]; + static const char * _SupportedHashes[10]; // internal helper std::string GetHashForFile(std::string filename) const; @@ -52,7 +53,8 @@ class HashString HashString(); // get hash type used - std::string HashType() { return Type; }; + std::string HashType() const { return Type; }; + std::string HashValue() const { return Hash; }; // verify the given filename against the currently loaded hash bool VerifyFile(std::string filename) const; @@ -64,37 +66,160 @@ class HashString // helper std::string toStr() const; // convert to str as "type:hash" bool empty() const; + bool operator==(HashString const &other) const; + bool operator!=(HashString const &other) const; // return the list of hashes we support static APT_CONST const char** SupportedHashes(); }; +class HashStringList +{ + public: + /** find best hash if no specific one is requested + * + * @param type of the checksum to return, can be \b NULL + * @return If type is \b NULL (or the empty string) it will + * return the 'best' hash; otherwise the hash which was + * specifically requested. If no hash is found \b NULL will be returned. + */ + HashString const * find(char const * const type) const; + HashString const * find(std::string const &type) const { return find(type.c_str()); } + /** check if the given hash type is supported + * + * @param type to check + * @return true if supported, otherwise false + */ + static APT_PURE bool supported(char const * const type); + /** add the given #HashString to the list + * + * @param hashString to add + * @return true if the hash is added because it is supported and + * not already a different hash of the same type included, otherwise false + */ + bool push_back(const HashString &hashString); + /** @return size of the list of HashStrings */ + size_t size() const { return list.size(); } + + /** take the 'best' hash and verify file with it + * + * @param filename to verify + * @return true if the file matches the hashsum, otherwise false + */ + bool VerifyFile(std::string filename) const; + + /** is the list empty ? + * + * @return \b true if the list is empty, otherwise \b false + */ + bool empty() const { return list.empty(); } + + /** has the list at least one good entry + * + * similar to #empty, but handles forced hashes. + * + * @return if no hash is forced, same result as #empty, + * if one is forced \b true if this has is available, \b false otherwise + */ + bool usable() const; + + typedef std::vector<HashString>::const_iterator const_iterator; + + /** iterator to the first element */ + const_iterator begin() const { return list.begin(); } + + /** iterator to the end element */ + const_iterator end() const { return list.end(); } + + /** start fresh with a clear list */ + void clear() { list.clear(); } + + /** compare two HashStringList for similarity. + * + * Two lists are similar if at least one hashtype is in both lists + * and the hashsum matches. All hashes are checked by default, + * if one doesn't match false is returned regardless of how many + * matched before. If a hash is forced, only this hash is compared, + * all others are ignored. + */ + bool operator==(HashStringList const &other) const; + bool operator!=(HashStringList const &other) const; + + HashStringList() {} + + // simplifying API-compatibility constructors + HashStringList(std::string const &hash) { + if (hash.empty() == false) + list.push_back(HashString(hash)); + } + HashStringList(char const * const hash) { + if (hash != NULL && hash[0] != '\0') + list.push_back(HashString(hash)); + } + + private: + std::vector<HashString> list; +}; + class Hashes { + /** \brief dpointer placeholder */ + void *d; + public: + /* those will disappear in the future as it is hard to add new ones this way. + * Use Add* to build the results and get them via GetHashStringList() instead */ + APT_DEPRECATED MD5Summation MD5; + APT_DEPRECATED SHA1Summation SHA1; + APT_DEPRECATED SHA256Summation SHA256; + APT_DEPRECATED SHA512Summation SHA512; - MD5Summation MD5; - SHA1Summation SHA1; - SHA256Summation SHA256; - SHA512Summation SHA512; - static const int UntilEOF = 0; - inline bool Add(const unsigned char *Data,unsigned long long Size) + bool Add(const unsigned char * const Data, unsigned long long const Size, unsigned int const Hashes = ~0); + inline bool Add(const char * const Data) + {return Add((unsigned char const * const)Data,strlen(Data));}; + inline bool Add(const unsigned char * const Beg,const unsigned char * const End) + {return Add(Beg,End-Beg);}; + + enum SupportedHashes { MD5SUM = (1 << 0), SHA1SUM = (1 << 1), SHA256SUM = (1 << 2), + SHA512SUM = (1 << 3) }; + bool AddFD(int const Fd,unsigned long long Size = 0, unsigned int const Hashes = ~0); + bool AddFD(FileFd &Fd,unsigned long long Size = 0, unsigned int const Hashes = ~0); + + HashStringList GetHashStringList(); + +#if __GNUC__ >= 4 + #pragma GCC diagnostic push + #pragma GCC diagnostic ignored "-Wdeprecated-declarations" +#endif + Hashes(); + virtual ~Hashes(); +#if __GNUC__ >= 4 + #pragma GCC diagnostic pop +#endif + + private: + APT_HIDDEN APT_CONST inline unsigned int boolsToFlag(bool const addMD5, bool const addSHA1, bool const addSHA256, bool const addSHA512) { - return MD5.Add(Data,Size) && SHA1.Add(Data,Size) && SHA256.Add(Data,Size) && SHA512.Add(Data,Size); + unsigned int Hashes = ~0; + if (addMD5 == false) Hashes &= ~MD5SUM; + if (addSHA1 == false) Hashes &= ~SHA1SUM; + if (addSHA256 == false) Hashes &= ~SHA256SUM; + if (addSHA512 == false) Hashes &= ~SHA512SUM; + return Hashes; + } + + public: + APT_DEPRECATED bool AddFD(int const Fd, unsigned long long Size, bool const addMD5, + bool const addSHA1, bool const addSHA256, bool const addSHA512) { + return AddFD(Fd, Size, boolsToFlag(addMD5, addSHA1, addSHA256, addSHA512)); + }; + + APT_DEPRECATED bool AddFD(FileFd &Fd, unsigned long long Size, bool const addMD5, + bool const addSHA1, bool const addSHA256, bool const addSHA512) { + return AddFD(Fd, Size, boolsToFlag(addMD5, addSHA1, addSHA256, addSHA512)); }; - inline bool Add(const char *Data) {return Add((unsigned char const *)Data,strlen(Data));}; - inline bool AddFD(int const Fd,unsigned long long Size = 0) - { return AddFD(Fd, Size, true, true, true, true); }; - bool AddFD(int const Fd, unsigned long long Size, bool const addMD5, - bool const addSHA1, bool const addSHA256, bool const addSHA512); - inline bool AddFD(FileFd &Fd,unsigned long long Size = 0) - { return AddFD(Fd, Size, true, true, true, true); }; - bool AddFD(FileFd &Fd, unsigned long long Size, bool const addMD5, - bool const addSHA1, bool const addSHA256, bool const addSHA512); - inline bool Add(const unsigned char *Beg,const unsigned char *End) - {return Add(Beg,End-Beg);}; }; #endif |