NAME

       zmq_curve_public - derive the public key from a private key

SYNOPSIS

       int zmq_curve_public (char *z85_public_key, char *z85_secret_key);

DESCRIPTION

       The zmq_curve_public() function shall derive the public key from a private key. The caller
       provides two buffers, each at least 41 octets large. In z85_secret_key the caller shall
       provide the private key, and the function will store the public key in z85_public_key. The
       keys are encoded using zmq_z85_encode(3).

RETURN VALUE

       The zmq_curve_public() function shall return 0 if successful, else it shall return -1 and
       set errno to one of the values defined below.

ERRORS

       ENOTSUP
           The libzmq library was not built with cryptographic support (libsodium).

EXAMPLE

       Deriving the public key from a CURVE private key.

           char public_key [41];
           char secret_key [41];
           int rc = zmq_curve_keypair (public_key, secret_key);
           assert (rc == 0);
           char derived_public[41];
           rc = zmq_curve_public (derived_public, secret_key);
           assert (rc == 0);
           assert (!strcmp (derived_public, public_key));

SEE ALSO

       zmq_z85_decode(3) zmq_z85_encode(3) zmq_curve_keypair(3) zmq_curve(7)

AUTHORS

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       Contribution Policy at http://www.zeromq.org/docs:contributing.