A basic C++ program to hash a single file or all the files in a directory, using the OpenSSL library.
$ ./hasher <file> <hash function> -r
[*] Hashing <file size> bytes.
[*] Output: <hash digest result>
The -r switch, hashes all the files inside a directory.
[*] Hashing <files in the directory> files in <directory name>
[+] Hashing <file name> size <file size> bytes
[-] Output: <hash digest result>
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