1ZMQ_CURVE_PUBLIC(3)               0MQ Manual               ZMQ_CURVE_PUBLIC(3)
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NAME

6       zmq_curve_public - derive the public key from a private key
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SYNOPSIS

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

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

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

23       ENOTSUP
24           The libzmq library was not built with cryptographic support
25           (libsodium).
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EXAMPLE

28       Deriving the public key from a CURVE private key.
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30           char public_key [41];
31           char secret_key [41];
32           int rc = zmq_curve_keypair (public_key, secret_key);
33           assert (rc == 0);
34           char derived_public[41];
35           rc = zmq_curve_public (derived_public, secret_key);
36           assert (rc == 0);
37           assert (!strcmp (derived_public, public_key));
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SEE ALSO

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

44       This page was written by the 0MQ community. To make a change please
45       read the 0MQ Contribution Policy at
46       http://www.zeromq.org/docs:contributing.
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500MQ 4.3.4                         01/22/2022               ZMQ_CURVE_PUBLIC(3)
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