If you used(and choose proper option) the recommended plugin installation option presented in this chapter, you have already created the self-signed certificate, so you can skip this part of the tutorial. The following section is needed for alternative ways for plugin installation or when you want to create another self-signed certificate.
Generating Self-Signed Certificate
To generate a self-signed certificate, execute the command below. The command will automatically create a self-signed certificate and download the certificate from the HSM via REST API/ TSB and add it to the Notation truststore in the Notation configuration directory.
The below command assumes that the plugin's config.json is stored in the {BINARY_PATH}, or that $CONFIG_PATH environment variable is set as well as that the command is run from directory where the notation-securosys binary is saved.
./notation-securosys generate-selfsign-crt
After running the command, provide the appropriate parameters in JSON format (example shown below).
Go to section "generate-selfsign-crt" in the input_example.json file and prepare the parameters, accordingly to this section (use any editor you are familiar with):
{
"keyId": "keyLabel",
"pluginConfig": {
"password": "optional"
},
"certificate": {
"validity": 365,
"attributes": {
"commonName": "Securosys_CN"
}
}
}
Command parameter and description:
| Variable parameters | Command and parameter description |
|---|---|
CONFIG_PATH=$PLUGIN_CONFIG_PATH/config.json | The path to the Securosys Docker Signing Notation Plugin configuration file. To be added in front of the command only if the config file is not stored in the {BINARY_PATH} or the environment variable is not set as described in chapter. |
"keyId": "pluginKeyId" | Specify the key identifier (key name) associated with your signing key name. |
["password":"optional"] | Optionally the password for the signing key. Omit the parameter completely if the key has no password. |
"certificate" {...} | Specify your certificate parameters. These parameters are used for self-signed certificate. Set commonName and validity of certificate, by default set to 365 days. |
Example command generating a self-signed certificate based on a singing key without password:
./notation-securosys generate-selfsign-crt
{
"keyId": "SecurosysImageSignKey01",
"pluginConfig": {},
"certificate": {
"validity": 365,
"attributes": {
"commonName": "DockerImageSign05"
}
}
}
Output upon successful certificate generation:
{
"label":"SecurosysImageSignKey01",
"certificate":
"-----BEGIN CERTIFICATE-----
MIIEazCCA1OgAwIBAgIGAYwWAbffMA0GCSqGSIb3DQEBCwUAMIHhMR8wHQYDVQQDDBZTZWN1cm9zeXNEb2NrZXJTaWduaW5nMQswCQYDVQQLDAJJVDEVMBMGA1UECgwMU2VjdXJvc3lzIFNB…=
-----END CERTIFICATE-----"
}
The self-signed certificate is signed by the signing key keyId itself, resulting in the certificate sharing the identical name with the signing key.
If you wish to sign the signing key with an own root/CA-key, follow the procedure using a certificate signing request (CSR) in the next chapter.
All created certificates are stored to the truststore of Notation in directory:
{NOTATION_CONFIG}/truststore/x509/ca/securosysTrustStore
Verify the creation and find all existing certificates by listing the directory content. Notation does not provide any specific command to list the certificates.
ls -al {NOTATION_CONFIG}/truststore/x509/ca/securosysTrustStore
After successfully creating the certificate, it is now possible to proceed to signing Docker images.