问题
How can I encode a file using sha256 and c/c++ ??? Thanks!
回答1:
SHA 256 stands for Secure Hash Algorithm ! It will only produce the hash of a given file . You can't retrieve the original file from a given hash otherwise hash functions are useless.
If you want to do encryption/decryption AES would be a better solution. Everything you need is in OpenSSL.
回答2:
If you don't know what SHA is for, then you better ask someone who knows this stuff instead of doing it yourself. Even if you use a given library, chances are very high that you will produce snake oil. Security depends on much more than calling some encryption functions.
来源：https://stackoverflow.com/questions/2486887/encrypt-file-with-sha256-using-c-c