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To Create a Java KeyStore and Trust Certificates

In this procedure, you generate a public key and a private key. You designate an alias for the KeyStore that contains the private key. Next, you generate a self-signed certificate only. Finally, you generate both a self-signed certificate and a certificate from Certificate Authorities. A certificate, required by most clients, authenticates the public key. An HTTPS connection, which uses TLS, requires these things.

  1. Open a terminal, and on the command line, enter a Java keytool command to create the keys in a KeyStore:

    keytool -genkey -alias serverkey -keyalg RSA -keystore httplistener.jks

  2. Respond to the prompts to enter a password for the KeyStore. The following output shows example responses:

    • Enter keystore password: mule123

    • Re-enter new password: mule123

  3. Respond to prompts to enter other values. You can enter arbitrary values. The following output shows example responses:

    • What is your first and last name? [Unknown]: max

    • What is the name of your organizational unit? [Unknown]: MuleSoft

    • What is the name of your organization? [Unknown]: MuleSoft Inc

    • What is the name of your City or Locality? [Unknown]: San Francisco

    • What is the name of your State or Province? [Unknown]: CA

    • What is the two-letter country code for this unit? [Unknown]: 01

  4. In response to the following prompt, enter yes.

    Is CN=kahn, OU=MuleSoft, O=MuleSoft Inc, L=San Francisco, ST=CA, C=01 correct? [no]: yes

  5. Respond to the following prompt. For example, use the same password by entering RETURN.

    Enter key password for <serverkey> (RETURN if same as keystore password):

  6. Enter the command to export a self-signed certificate authenticating the public key.

    keytool -export -alias serverkey -keystore httplistener.jks -file server_cert.cer
  7. Respond to the prompt to enter the password you set up for the KeyStore associated with the certificate.

    Enter keystore password: mule123

  8. Alternatively, instead of exporting just a self-signed certificate, generate both a certificate from Certificate Authorities and a self-signed certificate using a single command:

    keytool -genkeypair \
        -keystore httplistener.jks \
       -dname "CN=Unknown, OU=Unknown, O=Unknown, L=Unknown, ST=Unknown, C=Unknown" \
       -keypass mule123 \
       -storepass mule123 \
       -keyalg DSA \
       -sigalg SHA1withDSA \
       -keysize 1024 \
       -alias mulekey \
       -ext SAN=DNS:localhost,IP:127.0.0.1 \
       -validity 9999

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