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Code Block

language	bash
title	Example how to create Private Key and Certificate Signing Request using ECDSA encryption (Unix)
linenumbers	true

# Specify key name used for file names
ca_key_name=root-ca

# Create Private Key
openssl ecparam -genkey -name secp384r1 -out ${ca_key_name}.key

# Create Certificate Signing Request
openssl req -new -sha512 -nodes \
    -key ${ca_key_name}.key \
    -out ${ca_key_name}.csr \
    -subj "/C=DE/ST=Berlin/L=Berlin/O=SOS/OU=IT/CN=${ca_key_name}"

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title	Windows version...

Code Block

language	text
title	Example how to create Private Key and Certificate Signing Request using ECDSA encryption (Windows)
linenumbers	true

@rem Specify key name used for file names
set ca_key_name=root-ca
 
@rem Create Private Key
openssl ecparam -genkey -name secp384r1 -out %ca_key_name%.key
 
@rem Create Certificate Signing Request 
openssl req -new -sha512 -nodes ^
    -key %ca_key_name%.key ^
    -out %ca_key_name%.csr ^
    -subj "/C=DE/ST=Berlin/L=Berlin/O=SOS/OU=IT/CN=%ca_key_name%"

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title	Explanations...

Users should adjust the ca_key_name environment variable specifying a value that matches the purpose such as root-ca for a Root CA Certificate.
Private Key
- Choice of algorithm such as secp256k1, secp384r1 depends on support by the Java version used with JS7.
Certificare Signing Request
- The hash algorithm such as -sha256, -sha512 can be freely chosen.
- The -subj option specifies the Distinguished Name used for the subject of the CSR and resulting Certificate.
  - The Distinguished Name is a unique identifier frequently using the hierarchy of Country C, State ST, Location L, Organization O, Organizational Unit OU and Common Name CN.
  - For the Private Root CA Certificate the subject and issuer properties of the CSR/Certificate are the same. The minimum requirement is to specify the Common Name CN=<name> where <name> can freely be chosen.
  - For Private CA-signed Certificates the subject property holds the Certificate's Distinguished Name and the issuer property holds the Private CA Certificate's Distinguished Name using different values.
The following files will be created with this step:
- The root-ca.key file will hold the Private Key.
- The root-ca.csr file will hold the Certificate Signing Request.

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title	Click to expand/collapse...

Code Block

language	bash
title	Example how to create Private Key and Certificate Signing Request using RSA encryption (Unix)
linenumbers	true

# Specify key name used for file names
ca_key_name=root-ca

# Create Private Key and Certificate Signing Request
openssl req -new -newkey rsa:4096 -sha256 -nodes \
    -keyout ${ca_key_name}.key \
    -out ${ca_key_name}.csr \
    -subj "/C=DE/ST=Berlin/L=Berlin/O=SOS/OU=IT/CN=${ca_key_name}"

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title	Windows version...

Code Block

language	text
title	Example how to create Private Key and Certificate Signing Request using RSA encryption (Windows)
linenumbers	true

@rem Specify key name used for file names
set ca_key_name=root-ca
 
@rem Create Private Key and Certificate Signing Request
openssl req -new -newkey rsa:4096 -sha256 -nodes ^
    -keyout %ca_key_name%.key ^
    -out %ca_key_name%.csr ^
    -subj "/C=DE/ST=Berlin/L=Berlin/O=SOS/OU=IT/CN=%ca_key_name%"

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title	Explanations...

In the example the Private Key is created using the specified key size 4096.
Choice of algorithm such as secp256k1, secp384r1 depends on support by the Java version used with JS7.
For use of the -subj option see Using ECDSA Encryption.
The following files will be created with this step:
- The root-ca.key file will hold the Private Key.
- The root-ca.csr file will hold the Certificate Signing Request.

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Code Block

language	bash
title	Example how to create CA Certificate (Unix)
linenumbers	true

# Specify key name used for file names
ca_key_name=root-ca

# Create Certificate
openssl x509 -req -sha512 -days 7305 \
    -signkey ${ca_key_name}.key \
    -in ${ca_key_name}.csr \
    -out ${ca_key_name}.crt \
    -extfile <(printf "basicConstraints=CA:TRUE\nkeyUsage=critical,nonRepudiation,keyCertSign,cRLSign\n")

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title	Windows version...

Code Block

language	text
title	Example how to create CA Certificate (Windows)
linenumbers	true

@rem Specify key name used for file names
set ca_key_name=root-ca
 
@rem Create Certificate
set ca_csr_tmp_file=ca-csr-%RANDOM%.tmp
echo basicConstraints=CA:TRUE >> %ca_csr_tmp_file%
echo keyUsage=critical,nonRepudiation,keyCertSign,cRLSign >> %ca_csr_tmp_file%

openssl x509 -req -sha512 -days 7305 ^
    -key %ca_key_name%.key ^
    -in %ca_key_name%.csr ^
    -out %ca_key_name%.crt ^
    -extfile %ca_csr_tmp_file%

del /q %ca_csr_tmp_file%

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title	Explanations...

The SHA option such as -sha256, -sha384, -sha512 can be freely chosen.
The -days option specifies the validity period of the CA Certificate that should be longer than the validity period of individual certificates signed by the CA later on.
The -signkey option specifies the location of the Private Key file created from the previous step.
The -in option specifies the location of the Certificate Signing Request file created from the previous step.
The -out option specifies the location of the resulting Certificate file.
The -extfile option specifies the Basic Constraint CA:TRUE which is required for a CA Certificate. Key Usage is limited to signing certificates.
The following files will be created with this step:
- The root-ca.crt file will hold the CA Certificate.

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Code Block

language	bash
title	Example how to create Private Key and Certificate Signing Request using ECDSA encryption (Unix)
linenumbers	true

# Specify key name used for file names
server_name=myhost

# Create Private Key
openssl ecparam -genkey -name secp384r1 -out ${server_name}.key

# Create Certificate Signing Request
openssl req -new -sha512 -nodes \
    -key ${server_name}.key \
    -out ${server_name}.csr \
    -subj "/C=DE/ST=Berlin/L=Berlin/O=SOS/OU=IT/CN=${server_name}"

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title	Windows version...

Code Block

language	text
title	Example how to create Private Key and Certificate Signing Request using ECDSA encryption (Windows)
linenumbers	true

@rem Specify key name used for file names
set server_name=myhost

@rem Create Private Key
openssl ecparam -genkey -name secp384r1 -out %server_name%.key

@rem Create Certificate Signing Request
openssl req -new -sha512 -nodes ^
    -key %server_name%.key ^
    -out %server_name%.csr ^
    -subj "/C=DE/ST=Berlin/L=Berlin/O=SOS/OU=IT/CN=%server_name%"

Expand

title	Explanations...

Explanations are the same as for Using ECDSA Encryption.

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Expand

title	Click to expand/collapse...

Code Block

language	bash
title	Example how to create Private Key and Certificate Signing Request using RSA encryption (Unix)
linenumbers	true

# Specify key name used for file names
server_name=myhost

# Create Private Key and Certificate Signing Request
openssl req -new -newkey rsa:4096 -sha256 -nodes \
    -keyout ${server_name}.key \
    -out ${server_name}.csr \
    -subj "/C=DE/ST=Berlin/L=Berlin/O=SOS/OU=IT/CN=${server_name}"

Expand

title	Windows version...

Code Block

language	text
title	Example how to create Private Key and Certificate Signing Request using RSA encryption (Unix)
linenumbers	true

@rem Specify key name used for file names
set server_name=myhost

@rem Create Private Key and Certificate Signing Request
openssl req -new -newkey rsa:4096 -sha256 -nodes ^
    -keyout %server_name%.key ^
    -out %server_name%.csr ^
    -subj "/C=DE/ST=Berlin/L=Berlin/O=SOS/OU=IT/CN=%server_name%"

Explanations:

Explanations are the same as for Using RSA Encryption.

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Code Block

language	bash
title	Example how to create and sign Server Certificate (Unix)
linenumbers	true

# Specify server for which the certificate should be created
server_name=myhost

# Create and sign Server Certificate
openssl x509 -req -sha512 -days 3652 \
    -in ${server_name}.csr \
    -CA root-ca.crt \
    -CAkey root-ca.key \
    -CAcreateserial \
    -out ${server_name}.crt \
    -extfile <(printf 'subjectAltName=DNS:%s\nkeyUsage=critical,keyEncipherment,digitalSignature\nextendedKeyUsage=serverAuth,clientAuth\n' "${server_name}")

Expand

title	Windows version...

Code Block

language	text
title	Example how to create and sign Server Certificate (Windows)
linenumbers	true

@rem Specify key name used for file names
set server_name=myhost

@rem Create and sign Server Certificate
set server_crt_tmp_file=server-crt-%RANDOM%.tmp
echo subjectAltName=DNS:%server_name% >> %server_crt_tmp_file%
echo keyUsage=critical,keyEncipherment,digitalSignature >> %server_crt_tmp_file%
echo extendedKeyUsage=serverAuth,clientAuth >> %server_crt_tmp_file%
 
openssl x509 -req -sha512 -days 3652 ^
    -in %server_name%.csr ^
    -CA root-ca.crt ^
    -CAkey root-ca.key ^
    -CAcreateserial ^
    -out %server_name%.crt ^
    -extfile %server_crt_tmp_file%

del /q %server_crt_tmp_file%

Expand

title	Explanations...

The following files will be created for the given server:
- myhost.crt: the Server Certificate
For operation with JS7 JOC Cockpit, Controller and Agents users can add
- the Private Key and Server Certificate to a keystore.
- the Root CA Certificate to a truststore.
- For details see JS7 - How to add SSL TLS Certificates to Keystore and Truststore

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