EternalLines.com: Components: Hash Library  The Hash Library is a collection of commonly used hashing functions. Functions are available through a dynamic library (DLL) or directly from a Delphi source unit. The library is free and comes with complete source code. Hashing functions: A hashing function is an algorithm for computing a (fixed size) condensed representations of a message. The message is the data for which a condensed representation is calculated. The condensened representation is more commonly refered to as the message digest. Hashing functions are useful when an unique number, or fingerprint, is needed to represent a (large) piece of data. Hashes are refered to as secure if it is computationally infeasible to find a message that produce a given digest, ie the reverse of the hashing process. The library supports the following hashing algorithms: Checksum (32 bit) XOR (8, 16 and 32 bit) CRC (16 and 32 bit) MD5 (128 bit secure hash) SHA1 (160 bit secure hash) HMAC/MD5 (128 bit secure keyed hash) HMAC/SHA1 (160 bit secure keyed hash) Features of the DLL: Small footprint, fast routines and little resource usage. Support for well-known hashing methods. Functions to hash a file, or part of a file, by file name. Memory is securely cleared of traces of keys and digests when the hash calculation is complete. This prevents snooping in released memory for keys. Download complete package ( DLL, Source code, Delphi component and EXE demo ) [ Size: 294 Kb ] Download DLL only [ Size: 41 Kb ]