LIBKECCAK_UNHEX(3)         Library Functions Manual         LIBKECCAK_UNHEX(3)

NAME
       libkeccak_unhex - Converts a hexadecimal hashsum to binary

SYNOPSIS
       #include <libkeccak.h>

       void libkeccak_unhex(void *restrict output, const char *restrict hashsum);

       Link with -lkeccak.

DESCRIPTION
       The libkeccak_unhex() function converts a hexadecimal hashsum, stored
       in hashsum, to binary, and stores the binary representation in output.

       hashsum must be terminated by a NUL-character. It may be in either
       lowercase or uppercase, or a mixture thereof.  output will not be
       terminated.

       (strlen(hashsum) / 2) bytes will be written to the beginning of
       Ioutput.  It should therefore have an allocation of at least that
       number of bytes.

RETURN VALUES
       The libkeccak_unhex() function does return any value.

ERRORS
       The libkeccak_unhex() function cannot fail.

NOTES
       hashsum must have an even number of digits (characters excluding the
       terminating NUL-character.)

SEE ALSO
       libkeccak_behex_lower(3), libkeccak_behex_upper(3)

                                   LIBKECCAK                LIBKECCAK_UNHEX(3)