'\" t
.\"     Title: zmq_z85_encode
.\"    Author: [see the "AUTHORS" section]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 03/20/2024
.\"    Manual: 0MQ Manual
.\"    Source: 0MQ 4.3.5
.\"  Language: English
.\"
.TH "ZMQ_Z85_ENCODE" "3" "03/20/2024" "0MQ 4\&.3\&.5" "0MQ Manual"
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.SH "NAME"
zmq_z85_encode \- encode a binary key as Z85 printable text
.SH "SYNOPSIS"
.sp
\fBchar *zmq_z85_encode (char *dest, const uint8_t *data, size_t size);\fR
.SH "DESCRIPTION"
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The \fIzmq_z85_encode()\fR function shall encode the binary block specified by \fIdata\fR and \fIsize\fR into a string in \fIdest\fR\&. The size of the binary block must be divisible by 4\&. The \fIdest\fR must have sufficient space for size * 1\&.25 plus 1 for a null terminator\&. A 32\-byte CURVE key is encoded as 40 ASCII characters plus a null terminator\&.
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The encoding shall follow the ZMQ RFC 32 specification\&.
.SH "RETURN VALUE"
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The \fIzmq_z85_encode()\fR function shall return \fIdest\fR if successful, else it shall return NULL\&.
.SH "EXAMPLE"
.PP
\fBEncoding a CURVE key\fR. 
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.if n \{\
.RS 4
.\}
.nf
#include <sodium\&.h>
uint8_t public_key [32];
uint8_t secret_key [32];
int rc = crypto_box_keypair (public_key, secret_key);
assert (rc == 0);
char encoded [41];
zmq_z85_encode (encoded, public_key, 32);
puts (encoded);
.fi
.if n \{\
.RE
.\}
.sp
.SH "SEE ALSO"
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\fBzmq_z85_decode\fR(3) \fBzmq_curve_keypair\fR(3) \fBzmq_curve_public\fR(3) \fBzmq_curve\fR(7)
.SH "AUTHORS"
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This page was written by the 0MQ community\&. To make a change please read the 0MQ Contribution Policy at \m[blue]\fBhttp://www\&.zeromq\&.org/docs:contributing\fR\m[]\&.