1ZMQ_CURVE(7)                      0MQ Manual                      ZMQ_CURVE(7)
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NAME

6       zmq_curve - secure authentication and confidentiality
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SYNOPSIS

9       The CURVE mechanism defines a mechanism for secure authentication and
10       confidentiality for communications between a client and a server. CURVE
11       is intended for use on public networks. The CURVE mechanism is defined
12       by this document: http://rfc.zeromq.org/spec:25.
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CLIENT AND SERVER ROLES

15       A socket using CURVE can be either client or server, at any moment, but
16       not both. The role is independent of bind/connect direction.
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18       A socket can change roles at any point by setting new options. The role
19       affects all zmq_connect and zmq_bind calls that follow it.
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21       To become a CURVE server, the application sets the ZMQ_CURVE_SERVER
22       option on the socket, and then sets the ZMQ_CURVE_SECRETKEY option to
23       provide the socket with its long-term secret key. The application does
24       not provide the socket with its long-term public key, which is used
25       only by clients.
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27       To become a CURVE client, the application sets the ZMQ_CURVE_SERVERKEY
28       option with the long-term public key of the server it intends to
29       connect to, or accept connections from, next. The application then sets
30       the ZMQ_CURVE_PUBLICKEY and ZMQ_CURVE_SECRETKEY options with its client
31       long-term key pair.
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33       If the server does authentication it will be based on the client’s long
34       term public key.
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KEY ENCODING

37       The standard representation for keys in source code is either 32 bytes
38       of base 256 (binary) data, or 40 characters of base 85 data encoded
39       using the Z85 algorithm defined by http://rfc.zeromq.org/spec:32.
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41       The Z85 algorithm is designed to produce printable key strings for use
42       in configuration files, the command line, and code. There is a
43       reference implementation in C at
44       https://github.com/zeromq/rfc/tree/master/src.
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TEST KEY VALUES

47       For test cases, the client shall use this long-term key pair (specified
48       as hexadecimal and in Z85):
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50           public:
51               BB88471D65E2659B30C55A5321CEBB5AAB2B70A398645C26DCA2B2FCB43FC518
52               Yne@$w-vo<fVvi]a<NY6T1ed:M$fCG*[IaLV{hID
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54           secret:
55               7BB864B489AFA3671FBE69101F94B38972F24816DFB01B51656B3FEC8DFD0888
56               D:)Q[IlAW!ahhC2ac:9*A}h:p?([4%wOTJ%JR%cs
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58       And the server shall use this long-term key pair (specified as
59       hexadecimal and in Z85):
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61           public:
62               54FCBA24E93249969316FB617C872BB0C1D1FF14800427C594CBFACF1BC2D652
63               rq:rM>}U?@Lns47E1%kR.o@n%FcmmsL/@{H8]yf7
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65           secret:
66               8E0BDD697628B91D8F245587EE95C5B04D48963F79259877B49CD9063AEAD3B7
67               JTKVSB%%)wK0E.X)V>+}o?pNmC{O&4W4b!Ni{Lh6
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SEE ALSO

70       zmq_z85_encode(3) zmq_z85_decode(3) zmq_setsockopt(3) zmq_null(7)
71       zmq_plain(7) zmq(7)
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AUTHORS

74       This page was written by the 0MQ community. To make a change please
75       read the 0MQ Contribution Policy at
76       http://www.zeromq.org/docs:contributing.
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800MQ 4.3.4                         07/23/2021                      ZMQ_CURVE(7)
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