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76 lines
2.3 KiB
Bash
76 lines
2.3 KiB
Bash
#!/bin/sh
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# Generate a CA with a self-signed root certificate that then signs the server certificate
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# Based on the OpenSSL Cookbook by Ivan Ristic:
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# https://www.feistyduck.com/library/openssl-cookbook/online/
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#
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# Especially, see chapter 1.5. Creating a private Certification Authority:
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# https://www.feistyduck.com/library/openssl-cookbook/online/openssl-command-line/private-ca.html
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export KEY_PATH=keys
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export CRT_PATH=certificates
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export CA_PATH=ca
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# Create environment.
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# $CA_PATH is deleted in the end.
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# If new certificates need to be issued, this needs to be done before the cleanup in the end.
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mkdir -p $KEY_PATH $CRT_PATH $CA_PATH/db $CA_PATH/private $CA_PATH/certificates
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touch $CA_PATH/db/index
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openssl rand -hex 16 > $CA_PATH/db/serial
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# Generate all private keys
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openssl genpkey -algorithm ed25519 -out $KEY_PATH/root-ca.key
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openssl genpkey -algorithm ed25519 -out $KEY_PATH/server.key
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openssl genpkey -algorithm ed25519 -out $KEY_PATH/client.key
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# For the server, we also need the public key
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openssl pkey -in $KEY_PATH/server.key -pubout -out $KEY_PATH/server.pub
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# Generate a Certificate Signing Request for the Root CA based on a config file
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openssl req -new \
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-config root-ca.cnf -out root-ca.csr \
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-key $KEY_PATH/root-ca.key
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# Self-sign the root certificate
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openssl ca -batch \
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-selfsign -config root-ca.cnf \
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-extensions ca_ext \
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-in root-ca.csr -out $CRT_PATH/root-ca.crt -notext
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# Create a Certificate Signing request for the server certificate
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openssl req -new \
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-config server.cnf -out server.csr \
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-key $KEY_PATH/server.key
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openssl req -text -in server.csr -noout
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# Issue the server certificate
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openssl ca -batch \
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-config root-ca.cnf \
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-extensions server_ext \
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-extfile server.cnf -extensions ext \
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-in server.csr -out $CRT_PATH/server.crt -notext \
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-days 1825
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# Create a Certificate Signing request for the client certificate
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openssl req -new \
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-config client.cnf -out client.csr \
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-key $KEY_PATH/client.key
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# Issue the client certificate
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openssl ca -batch \
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-config root-ca.cnf \
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-extensions client_ext \
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-in client.csr -out $CRT_PATH/client.crt -notext \
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-days 1825
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# Clean up
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# IMPORTANT: If new certificates should be issued, $CA_PATH and its files MUST NOT be deleted!
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# New certificates can be created in this script before cleaning up.
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rm -rf *.csr $CA_PATH
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