1MOSQUITTO-TLS(7)         Conventions and miscellaneous        MOSQUITTO-TLS(7)
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NAME

6       mosquitto-tls - Configure SSL/TLS support for Mosquitto
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DESCRIPTION

9       mosquitto provides SSL support for encrypted network connections and
10       authentication. This manual describes how to create the files needed.
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12           Note
13           It is important to use different certificate subject parameters for
14           your CA, server and clients. If the certificates appear identical,
15           even though generated separately, the broker/client will not be
16           able to distinguish between them and you will experience difficult
17           to diagnose errors.
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GENERATING CERTIFICATES

20       The sections below give the openssl commands that can be used to
21       generate certificates, but without any context. The asciicast at
22       https://asciinema.org/a/201826 gives a full run through of how to use
23       those commands.
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CERTIFICATE AUTHORITY

26       Generate a certificate authority certificate and key.
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28       ·   openssl req -new -x509 -days <duration> -extensions v3_ca -keyout
29           ca.key -out ca.crt
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SERVER

32       Generate a server key.
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34       ·   openssl genrsa -des3 -out server.key 2048
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36       Generate a server key without encryption.
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38       ·   openssl genrsa -out server.key 2048
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40       Generate a certificate signing request to send to the CA.
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42       ·   openssl req -out server.csr -key server.key -new
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44           Note
45           When prompted for the CN (Common Name), please enter either your
46           server (or broker) hostname or domain name.
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48       Send the CSR to the CA, or sign it with your CA key:
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50       ·   openssl x509 -req -in server.csr -CA ca.crt -CAkey ca.key
51           -CAcreateserial -out server.crt -days <duration>
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CLIENT

54       Generate a client key.
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56       ·   openssl genrsa -des3 -out client.key 2048
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58       Generate a certificate signing request to send to the CA.
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60       ·   openssl req -out client.csr -key client.key -new
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62       Send the CSR to the CA, or sign it with your CA key:
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64       ·   openssl x509 -req -in client.csr -CA ca.crt -CAkey ca.key
65           -CAcreateserial -out client.crt -days <duration>
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SEE ALSO

68       mosquitto(8), mosquitto-conf(5)
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AUTHOR

71       Roger Light <roger@atchoo.org>
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75Mosquitto Project                 04/30/2019                  MOSQUITTO-TLS(7)
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