This documentation is for WSO2 IoT Server 3.0.0. View the documentation for the latest release.
Due to a known issue do not use JDK1.8.0_151 with WSO2 products. Use JDK 1.8.0_144 until JDK 1.8.0_162-ea is released.
General iOS Server Configurations - IoT Server 3.0.0 - WSO2 Documentation
                                                                                                                                                                                                                                                                                                                                                                                                 
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This section includes the details on how to generate the Certificate Authority (CA), Registration Authority (RA) and SSL certificate. For more information, check out the subsections given below:

Prerequisites 

Download and install OpenSSL.

For more information, see how to download and install OpenSSL.

Configuring iOS server-side configurations

Follow the instructions below to configure the iOS server-side configurations:

  1. Create a new file named openssl.cnf in a preferred location.

  2. Include the following configurations to the openssl.cnf file, to generate version 3 certificates as shown below:

    [ v3_req ] 
    # Extensions to add to a certificate request 
    basicConstraints=CA:TRUE 
    keyUsage = digitalSignature, keyEncipherment 
    
    [ v3_ca ] 
    # Extensions for a typical CA 
    # PKIX recommendation. 
    subjectKeyIdentifier=hash 
    authorityKeyIdentifier=keyid:always,issuer 
    # This is what PKIX recommends but some broken software chokes on critical 
    # extensions. 
    basicConstraints = critical,CA:true 
    # So we do this instead. 
    #basicConstraints = CA:true 
    # Key usage: this is typical for a CA certificate. However since it will 
    # prevent it being used as an test self-signed certificate it is best 
    # left out by default. 
    keyUsage = digitalSignature, keyCertSign, cRLSign

    Why is this step required?

    The CA, RA, and SSL certificates will be generated using the openSSL toolkit as explained in step 4, step 5 and step 6 respectively. Therefore, the openssl.cnf file must be configured as explained above.

  3. In the location where you modified and saved the openssl.cnf file, run the following commands to generate a self-signed Certificate Authority (CA) certificate (version 3) and convert the certificate to the.pem format: 

    1. openssl genrsa -out <CA PRIVATE KEY> 4096
      For example: openssl genrsa -out ca_private.key 4096
    2. openssl req -new -key <CA PRIVATE KEY> -out <CA CSR>
      For example: openssl req -new -key ca_private.key -out ca.csr
    3. openssl x509 -req -days <DAYS> -in <CA CSR> -signkey <CA PRIVATE KEY> -out <CA CRT> -extensions v3_ca -extfile <PATH-TO-THE-NEWLY-CREATED-openssl.cnf-FILE>
      For example: openssl x509 -req -days 365 -in ca.csr -signkey ca_private.key -out ca.crt -extensions v3_ca -extfile ./openssl.cnf
    4. openssl rsa -in <CA PRIVATE KEY> -text > <CA PRIVATE PEM>
      For example:  openssl rsa -in ca_private.key -text > ca_private.pem
    5. openssl x509 -in <CA CRT> -out <CA CERT PEM>
      For example: openssl x509 -in ca.crt -out ca_cert.pem
  4. In the same location, run the following commands to generate a Registration Authority (RA) certificate (version 3), sign it with the CA, and convert the certificate to the .pem format.  

    1. openssl genrsa -out <RA PRIVATE KEY> 4096
      For example:  openssl genrsa -out ra_private.key 4096

    2. openssl req -new -key <RA PRIVATE KEY> -out <RA CSR>
      For example: openssl req -new -key ra_private.key -out ra.csr
    3. openssl x509 -req -days <DAYS> -in <RA CSR> -CA <CA CRT> -CAkey <CA PRIVATE KEY> -set_serial <SERIAL NO> -out <RA CRT> -extensions v3_req -extfile <PATH-TO-THE-NEWLY-CREATED-openssl.cnf-FILE>
      For example: openssl x509 -req -days 365 -in ra.csr -CA ca.crt -CAkey ca_private.key -set_serial 02 -out ra.crt -extensions v3_req -extfile ./openssl.cnf
    4. openssl rsa -in <CA PRIVATE KEY> -text> <RA PRIVATE PEM>
      For example: openssl rsa -in ra_private.key -text > ra_private.pem
    5. openssl x509 -in <RA CRT> -out <RA CERT PEM>
      For example: openssl x509 -in ra.crt -out ra_cert.pem
  5. Generate the SSL certificate (version 3) based on your domain/IP address:

    If you have already obtained an SSL certificate for your domain, you can skip this step and use that SSL certificate in step 7.

    You must add your IP address/domain as the Common Name. Otherwise, provisioning will fail. 

    1. Generate an RSA key.
      openssl genrsa -out <RSA_key>.key 4096
      For example:
      openssl genrsa -out ia.key 4096
    2. Generate a CSR file.
      openssl req -new -key <RSA_key>.key -out <CSR>.csr
      For example:
      openssl req -new -key ia.key -out ia.csr
      Enter your server IP address/domain name (e.g., 192.168.1.157) as the Common Name else provisioning will fail.
    3. Generate the SSL certificate
      openssl x509 -req -days 730 -in <CSR>.csr -CA ca_cert.pem -CAkey ca_private.pem -set_serial <serial number> -out ia.crt
      For example: 
      openssl x509 -req -days 730 -in ia.csr -CA ca_cert.pem -CAkey ca_private.pem -set_serial 044324343 -out ia.crt
  6. Export the SSL, CA and RA files as PKCS12 files with an alias.

    1. Export the SSL file as a PKCS12 file with an "wso2carbon" as the alias. 

      If you are using intermediate certifications, make sure to create a single certificate file that includes all these certificates by archiving them using the cat <CERTIFCATE 1> <CERTIFICATE 2> ... >> <CERTIFICATE CHAIN> command. Use the generated certificate chain for the proceeding step.

      openssl pkcs12 -export -out <KEYSTORE>.p12 -inkey <RSA_key>.key -in ia.crt -CAfile ca_cert.pem -name "<alias>"
      For example:
      openssl pkcs12 -export -out KEYSTORE.p12 -inkey ia.key -in ia.crt -CAfile ca_cert.pem -name "wso2carbon"

    2. Export the CA file as a PKCS12 file with an alias.
      openssl pkcs12 -export -out <CA>.p12 -inkey <CA private key>.pem -in <CA Cert>.pem -name "<alias>"
      For example:
      openssl pkcs12 -export -out ca.p12 -inkey ca_private.pem -in ca_cert.pem -name "cacert"
      In the above example, cacert has been used as the CA alias. 
    3. Export the RA file as a PKCS12 file with an alias.
      openssl pkcs12 -export -out <RA>.p12 -inkey <RA private key>.pem -in <RA Cert>.pem -chain -CAfile <CA cert>.pem -name "<alias>"
      For example:
      openssl pkcs12 -export -out ra.p12 -inkey ra_private.pem -in ra_cert.pem -chain -CAfile ca_cert.pem -name "racert"
      In the above example, racert has been used as the RA alias. 

    Why is this step required?

    A PKCS12 file is used to store many cryptography objects as a single file. The certificates and their private keys that were generated using the above commands are stored in a PKCS12 file so that it can be imported to the respective KeyStores as shown in step 9.

  7. Copy the three P12 extension files to the <IoT_HOME>/repository/resources/security directory.

    Why is this step required?

    The <IoT_HOME>/repository/resources/security directory is where the WSO2 IoT KeyStores are stored.
    Example for KeyStores: wso2carbon.jks, client-truststore.jks and wso2certs.jks.

  8. Import the generated P12 extension files as follows:
    1. Import the generated <KEYSTORE>.p12 file into the wso2carbon.jks and client-truststore.jks in the <IoT_HOME>/repository/resources/security directory.
      keytool -importkeystore -srckeystore <KEYSTORE>.p12 -srcstoretype PKCS12 -destkeystore <wso2carbon.jks/client-truststore.jks>

      • When prompted, enter the keystore password and keystore key password as wso2carbon.
      • When prompted to replace an existing entry that has the same name as wso2carbon, enter yes.
        Example: Existing entry alias wso2carbon exists, overwrite? [no]:  yes

      For example:
      keytool -importkeystore -srckeystore KEYSTORE.p12 -srcstoretype PKCS12 -destkeystore wso2carbon.jks
      keytool -importkeystore -srckeystore KEYSTORE.p12 -srcstoretype PKCS12 -destkeystore client-truststore.jks

    2. Import the generated <CA>.p12 and <RA>.p12 files into the wso2certs.jks file, which is in the <IoT_HOME>/repository/resources/security directory.
      keytool -importkeystore -srckeystore <CA/RA>.p12 -srcstoretype PKCS12 -destkeystore wso2certs.jks 

      For example:
      keytool -importkeystore -srckeystore ca.p12 -srcstoretype PKCS12 -destkeystore wso2certs.jks 
      Enter the keystore password as wso2carbon and the keystore key password as cacert.

      keytool -importkeystore -srckeystore ra.p12 -srcstoretype PKCS12 -destkeystore wso2certs.jks 
      Enter the keystore password as  wso2carbon  and the keystore key password as  racert .

      Troubleshooting

      Why does the following error occur: " keytool error: java.io.IOException: Invalid keystore format"?

      If you enter the wrong private key password when importing the <CA>.p12 or <RA>.p12 files, the wso2certs.jks file will get corrupted and the above error message will appear.

      In such a situation, delete the wso2certs.jks file and execute the following command to import the generated <CA>.p12 and <RA>.p12 files into the wso2certs.jks file again.
      keytool -importkeystore -srckeystore <CA/RA>.p12 -srcstoretype PKCS12 -destkeystore wso2certs.jks

      When the above command is executed, WSO2 IoT will automatically create a new wso2certs.jks file with the imported file.

  9. The default IoT keystore details are defined under the <CertificateKeystore> XML element in the certificate-config.xml file, which is in the <IoT_HOME>/core/repository/conf directory. Therefore, if any of the following details are changed, it needs to be reflected in <CertificateKeystore>:

    • Certificate Keystore file location
    • Certificate Keystore type
    • Certificate Keystore password
    • Certificate authority certificate alias 
    • Certificate authority private key password
    • Registration authority certificate alias
    • Registration authority private key password 

    Example:

    <?xml version="1.0" encoding="ISO-8859-1"?>
    <CertificateConfigurations>
        <CertificateKeystore>
            <!-- Certificate Keystore file location-->
            <CertificateKeystoreLocation>${carbon.home}/repository/resources/security/wso2certs.jks</CertificateKeystoreLocation>
            <!-- Certificate Keystore type (JKS/PKCS12 etc.)-->
            <CertificateKeystoreType>JKS</CertificateKeystoreType>
            <!-- Certificate Keystore password-->
            <CertificateKeystorePassword>wso2carbon</CertificateKeystorePassword>
            <!-- Certificate authority certificate alias -->
            <CACertAlias>cacert</CACertAlias>
            <!-- Certificate authority private key password -->
            <CAPrivateKeyPassword>cacert</CAPrivateKeyPassword>
            <!-- Registration authority certificate alias -->
            <RACertAlias>racert</RACertAlias>
            <!-- Registration authority private key password -->
            <RAPrivateKeyPassword>racert</RAPrivateKeyPassword>
        </CertificateKeystore>
        <!-- Certificate Mgt DB schema -->
        <ManagementRepository>
            <DataSourceConfiguration>
                <JndiLookupDefinition>
                    <Name>jdbc/DM_DS</Name>
                </JndiLookupDefinition>
            </DataSourceConfiguration>
        </ManagementRepository>
        <!-- Default page size of GET certificates API -->
        <DefaultPageSize>10</DefaultPageSize>
    </CertificateConfigurations>

What's next?

Next, Generate the Certificates from the Apple Developer Portal.

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