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Rego Inline Policies

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The English user guide is currently in beta preview. Most of the documents have been automatically translated from the Japanese version. Should you find any inaccuracies, please reach out to Flatt Security.

This page presents the API specifications between inline policies scripted in Rego for jobs in workflows, and the Shisho Cloud.

API for jobs[].decide.rego​

Inline policies set in jobs[].decide.rego carry out the inspection and auditing roles within the "Data Acquisition → Inspection/Audit → Notification & Recording of Results" functionalities of a workflow.

Package Name​

There are no restrictions. You can define any package name you desire.

package arbitrary.name.could.be.specified

Inputs for Policy Execution​

Certain inputs are provided for the inline policy specified in jobs[].decide.rego.

input​

The input variable carries the data retrieved by the GraphQL query detailed in jobs[].decide.input.schema.

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Suppose the GraphQL query is like this:

query {
  github {
    organizations {
      login
      requiresTwoFactorAuthentication
    }
  }
}

In this situation, an object like the following is stored in the input variable accessible within the inline policy:

{
  "github": {
    "organizations": [
      {
        "login": "octcat",
        "requiresTwoFactorAuthentication": true
      },
      {
        "login": "your-org-name",
        "requiresTwoFactorAuthentication": false
      }
    ]
  }
}

You can access the above object in the inline policy like this:

org := input.github.organizations[_]

data.shisho​

The data.shisho variable contains the definitions in the official Shisho Cloud Rego library.

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For example, if you wish to access the package_known_vulnerability function in the shisho.decision.dependency package, you can define your Rego policy like this:

import data.shisho

x := shisho.decision.dependency.package_known_vulnerability(...)

Expected Policy Outputs​

decisions Variable​

Inline policies must store a List of Decision structured data in decisions. Through this, the results of the policy's inspection/audit can be conveyed to Shisho Cloud.

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Inside the official Shisho Cloud Rego library, you can use functions with the description of "Emits a decision..." to conveniently generate a decision with a specific kind.

API for jobs[].notify.rego​

Package Name​

There are no limitations. You can define any package name you desire.

Inputs for Policy Execution​

input.query​

The data retrieved by the GraphQL query described in jobs[].notify.input.schema is stored.

input.organization_id​

The ID of the organization executing the workflow is stored.

input.workflow_id​

It stores the workflow's ID.

input.job_id​

The ID of the job where the inline policy is prescribed is stored.

input.decisions​

The decisions generated by the decide block of the job with the designated inline policy are stored.

input.running_state​

The running state of the job that has the prescribed inline policy is stored.

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Under shisho.job, the potential values that this variable can hold are defined as constants.

input.exit_code​

The exit status of the job that has the designated inline policy is stored.

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Under shisho.job, the potential values that this variable can hold are defined as constants.

data.shisho​

The data.shisho variable contains the definitions stored in the official Shisho Cloud Rego library.

Expected Policy Outputs​

notifications Variable​

Inline policies should store a List of Notification structured data in notifications. This mechanism allows the inline policy to instruct Shisho Cloud to send notifications.

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You can easily create a Notification object using the shisho.notification.new() function in the official Shisho Cloud Rego library.

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