0MQ Api

Name

zmq_curve_public - derive the public key from a private key

Synopsis

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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