X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/6db194289ece36e62cb8dab0aa178209b46c59f2..ab16ead7f8e3824f5099558b9d559f6520a24570:/apt-pkg/contrib/hashes.h diff --git a/apt-pkg/contrib/hashes.h b/apt-pkg/contrib/hashes.h index e702fcca2..9bfc32c54 100644 --- a/apt-pkg/contrib/hashes.h +++ b/apt-pkg/contrib/hashes.h @@ -17,62 +17,236 @@ #include #include #include +#include -#include -#include #include +#include +#ifndef APT_8_CLEANER_HEADERS using std::min; using std::vector; +#endif +#ifndef APT_10_CLEANER_HEADERS +#include +#include +#include +#endif + + +class FileFd; // helper class that contains hash function name // and hash class HashString { protected: - string Type; - string Hash; + std::string Type; + std::string Hash; static const char * _SupportedHashes[10]; + // internal helper + std::string GetHashForFile(std::string filename) const; + public: - HashString(string Type, string Hash); - HashString(string StringedHashString); // init from str as "type:hash" + HashString(std::string Type, std::string Hash); + HashString(std::string StringedHashString); // init from str as "type:hash" HashString(); // get hash type used - string HashType() { return Type; }; + std::string HashType() const { return Type; }; + std::string HashValue() const { return Hash; }; + APT_DEPRECATED_MSG("method was const-ified") std::string HashType() { return Type; }; + APT_DEPRECATED_MSG("method was const-ified") std::string HashValue() { return Hash; }; // verify the given filename against the currently loaded hash - bool VerifyFile(string filename) const; + bool VerifyFile(std::string filename) const; + + // generate a hash string from the given filename + bool FromFile(std::string filename); + // helper - string toStr() const; // convert to str as "type:hash" + std::string toStr() const; // convert to str as "type:hash" bool empty() const; + bool usable() const; + bool operator==(HashString const &other) const; + bool operator!=(HashString const &other) const; // return the list of hashes we support - static const char** SupportedHashes(); + 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()); } + + /** finds the filesize hash and returns it as number + * + * @return beware: if the size isn't known we return \b 0 here, + * just like we would do for an empty file. If that is a problem + * for you have to get the size manually out of the list. + */ + unsigned long long FileSize() const; + + /** sets the filesize hash + * + * @param Size of the file + * @return @see #push_back + */ + bool FileSize(unsigned long long const Size); + + /** 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(); } + + /** verify file against all hashes in the list + * + * @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::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 list; +}; + +class PrivateHashes; class Hashes { + PrivateHashes * const 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_MSG("Use general .Add* and .GetHashStringList methods instead of hardcoding specific hashes") MD5Summation MD5; + APT_DEPRECATED_MSG("Use general .Add* and .GetHashStringList methods instead of hardcoding specific hashes") SHA1Summation SHA1; + APT_DEPRECATED_MSG("Use general .Add* and .GetHashStringList methods instead of hardcoding specific hashes") SHA256Summation SHA256; + APT_DEPRECATED_MSG("Use general .Add* and .GetHashStringList methods instead of hardcoding specific hashes") SHA512Summation SHA512; - MD5Summation MD5; - SHA1Summation SHA1; - SHA256Summation SHA256; - SHA512Summation SHA512; - - inline bool Add(const unsigned char *Data,unsigned long Size) + static const int UntilEOF = 0; + + bool Add(const unsigned char * const Data, unsigned long long const Size); + APT_DEPRECATED_MSG("Construct accordingly instead of choosing hashes while adding") bool Add(const unsigned char * const Data, unsigned long long const Size, unsigned int const Hashes); + 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); + APT_DEPRECATED_MSG("Construct accordingly instead of choosing hashes while adding") bool AddFD(int const Fd,unsigned long long Size, unsigned int const Hashes); + bool AddFD(FileFd &Fd,unsigned long long Size = 0); + APT_DEPRECATED_MSG("Construct accordingly instead of choosing hashes while adding") bool AddFD(FileFd &Fd,unsigned long long Size, unsigned int const Hashes); + + HashStringList GetHashStringList(); + +APT_IGNORE_DEPRECATED_PUSH + /** create a Hashes object to calculate all supported hashes + * + * If ALL is too much, you can limit which Hashes are calculated + * with the following other constructors which mention explicitly + * which hashes to generate. */ + Hashes(); + /** @param Hashes bitflag composed of #SupportedHashes */ + Hashes(unsigned int const Hashes); + /** @param Hashes is a list of hashes */ + Hashes(HashStringList const &Hashes); + virtual ~Hashes(); +APT_IGNORE_DEPRECATED_POP + + 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_IGNORE_DEPRECATED_PUSH + APT_DEPRECATED_MSG("Construct accordingly instead of choosing hashes while adding") 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_MSG("Construct accordingly instead of choosing hashes while adding") 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 *)Data,strlen(Data));}; - inline bool AddFD(int const Fd,unsigned long Size = 0) - { return AddFD(Fd, Size, true, true, true, true); }; - bool AddFD(int const Fd, unsigned 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);}; +APT_IGNORE_DEPRECATED_POP }; #endif