#ifndef __HASH_H #define __HASH_H #include <string> #include "util.hh" using namespace std; typedef enum { htUnknown, htMD5, htSHA1, htSHA256 } HashType; const int md5HashSize = 16; const int sha1HashSize = 20; const int sha256HashSize = 32; extern const string base32Chars; struct Hash { static const unsigned int maxHashSize = 32; unsigned int hashSize; unsigned char hash[maxHashSize]; HashType type; /* Create an unusable hash object. */ Hash(); /* Create a zero-filled hash object. */ Hash(HashType type); /* Check whether two hash are equal. */ bool operator == (const Hash & h2) const; /* Check whether two hash are not equal. */ bool operator != (const Hash & h2) const; /* For sorting. */ bool operator < (const Hash & h) const; }; /* Convert a hash to a hexadecimal representation. */ string printHash(const Hash & hash); /* Parse a hexadecimal representation of a hash code. */ Hash parseHash(HashType ht, const string & s); /* Convert a hash to a base-32 representation. */ string printHash32(const Hash & hash); /* Parse a base-32 representation of a hash code. */ Hash parseHash32(HashType ht, const string & s); /* Verify that the given string is a valid hash code. */ bool isHash(const string & s); /* Compute the hash of the given string. */ Hash hashString(HashType ht, const string & s); /* Compute the hash of the given file. */ Hash hashFile(HashType ht, const Path & path); /* Compute the hash of the given path. The hash is defined as (essentially) hashString(ht, dumpPath(path)). */ Hash hashPath(HashType ht, const Path & path); /* Compress a hash to the specified number of bytes by cyclically XORing bytes together. */ Hash compressHash(const Hash & hash, unsigned int newSize); /* Parse a string representing a hash type. */ HashType parseHashType(const string & s); #endif /* !__HASH_H */