sha256 computes the SHA256 hash of a given string and encodes it with
The given string is first encoded as UTF-8 and then the SHA256 algorithm is applied as defined in RFC 4634. The raw hash is then encoded to lowercase hexadecimal digits before returning.
> sha256("hello world") b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9
filesha256calculates the same hash from the contents of a file rather than from a string value.
base64sha256calculates the same hash but returns the result in a more-compact Base64 encoding.