DragonFly On-Line Manual Pages
HMAC256(1) Libgcrypt HMAC256(1)
hmac256 - Compute an HMAC-SHA-256 MAC
hmac256 [--binary] key [FILENAME]
This is a standalone HMAC-SHA-256 implementation used to compute an
HMAC-SHA-256 message authentication code. The tool has originally been
developed as a second implementation for Libgcrypt to allow comparing
against the primary implementation and to be used for internal
consistency checks. It should not be used for sensitive data because
no mechanisms to clear the stack etc are used.
The code has been written in a highly portable manner and requires only
a few standard definitions to be provided in a config.h file.
hmac256 is commonly invoked as
hmac256 "This is my key" foo.txt
This compute the MAC on the file `foo.txt' using the key given on the
hmac256 understands these options:
Print the MAC as a binary string. The default is to print the
MAC encoded as lower case hex digits.
Print version of the program and exit.
Libgcrypt 1.10.2 2023-09-28 HMAC256(1)