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cyclonedx-bom-repo-server

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A BOM repository server for distributing CycloneDX BOMs

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# CycloneDX BOM Repository Server

A BOM repository server for distributing CycloneDX BOMs.

You can test it out locally using Docker by running:

```
docker run --env ALLOWEDMETHODS__GET="true" --env ALLOWEDMETHODS__POST="true" --env ALLOWEDMETHODS__DELETE="true" --tty --interactive -p 8000:8080 cyclonedx/cyclonedx-bom-repo-server
```

Or, if you would like to persist BOM repository storage between runs by using local folder "bomstorage":

```
mkdir bomstorage
docker run --volume "$(pwd)/bomstorage":/repo --env ALLOWEDMETHODS__GET="true" --env ALLOWEDMETHODS__POST="true" --env ALLOWEDMETHODS__DELETE="true" --tty --interactive -p 8000:8080 cyclonedx/cyclonedx-bom-repo-server
```

then hit "http://localhost:8000/swagger" from browser

To build your own docker image

```
git clone github.com:CycloneDX/cyclonedx-bom-repo-server.git
cd cyclonedx-bom-repo-server
./build-and-run.sh
```

## API Endpoints

The server supports Swagger/Open API Specification.

The JSON endpoint is `/swagger/v1/swagger.json`. The UI can be accessed at
`/swagger`.

A summary of the available endpoints and methods are below:

| Path | HTTP Method | Required Parameters | Optional Parameters | Description |
| --- | --- | --- | --- | --- |
| /v1/bom | GET | `serialNumber` | `version`, `original` | If only the `serialNumber` parameter is supplied, retrieve the latest version of the BOM from the repository. If providing `serialNumber` and `version`, a specific version of the BOM will be retrieved. Supports HTTP content negotiation for all CycloneDX BOM formats and versions. If `original` is true, returns the original, unmodified BOM. |
| /v1/bom | POST | BOM content in request body and appropriate `Content-Type` header | | Adds a new BOM to the repository. Supports all CycloneDX BOM formats and versions. If the submitted BOM does not have a serial number, one will be generated. If the BOM does not have a version the next version number will be added. The response will contain an appropriate `Location` header to reference the BOM in the repository. |
| /v1/bom | DELETE | `serialNumber` | `version` | If only the `serialNumber` parameter is supplied, all versions of the BOM will be deleted from the repository. If `serialNumber` and `version` are supplied, only the specific version will be deleted from the repository. |
| /v1/bomexchange | GET  | `bomIdentifier` | | Input valid serial number UUID URN or CDX URN to retrieve BOM. |
| /v1/bomexchange | POST | BOM content in request body and appropriate `Content-Type` header | | Adds a new BOM to the repository. Supports all CycloneDX BOM formats and versions. If the submitted BOM does not have a serial number, one will be generated. If the BOM does not have a version the next version number will be added. The response will contain an appropriate `Location` header to reference the BOM in the repository. |
| /v1/search | GET | One of `group`, `name`, `version` | rest of `group`, `name`, `version` | Retrieve a list of BOM serial numbers and versions that match the supplied metadata component search criteria. |

NOTE:
BOM serial numbers should be unique for a particular device/software version.
When updating an existing BOM for the same software version, the BOM serial number
should remain the same, and the version number should be incremented.
For this reason, updating an existing BOM version is not supported.
There is, of course, nothing to prevent deleting an existing BOM version and re-publishing
it with the same serial number and version. But this is not recommended.

### Example cURL Usage

Retrieving a BOM from the repository

```
curl -X GET 'http://localhost:8000/v1/bom?serialNumber=urn%3Auuid%3A3e671687-395b-41f5-a30f-a58921a69b79' -H 'accept: application/vnd.cyclonedx+json; version=1.4'
```

Adding a new BOM to the repository

```
curl -X POST "http://localhost:8000/v1/bom" -H  "accept: */*" -H  "Content-Type: application/vnd.cyclonedx+json; version=1.4" -d "{\"bomFormat\":\"CycloneDX\",\"specVersion\":\"1.3\",\"serialNumber\":\"urn:uuid:3e671687-395b-41f5-a30f-a58921a69b79\",\"version\":1,\"components\":[{\"type\":\"library\",\"name\":\"acme-library\",\"version\":\"1.0.0\"}]}"

```

Deleting a BOM from the repository

```
curl -X DELETE 'http://localhost:8000/v1/bom/serialNumber=urn%3Auuid%3A3e671687-395b-41f5-a30f-a58921a69b79?version=1' -H 'accept: */*'
```

## Configuration

The server can be configured by changing the `src/CycloneDX.BomRepoServer/appsettings.json` file or setting
the following environment variables

| Environment Variable Name | Supported Values | Description | Default Value |
| --- | --- | --- | --- |
| REPO__DIRECTORY | Any valid directory path | The directory BOMs are stored | `Repo` (set to `\repo` within the official Container since *tbd*) |
| ALLOWEDMETHODS__GET | `true` or `false` | Allows or forbids BOM retrieval | `false` |
| ALLOWEDMETHODS__POST | `true` or `false` | Allows or forbids BOM creation | `false` |
| ALLOWEDMETHODS__DELETE | `true` or `false` | Allows or forbids BOM deletion | `false` |
| RETENTION__MAXBOMVERSIONS | Any integer value >= 0 | The maximum number of BOM versions that will be retained. If zero, the number of BOM versions are ignored for retention. | `0` |
| RETENTION__MAXBOMAGE | Any integer value >= 0 | The maximum age of a BOM, in days, before it is removed. If zero, the BOM age is ignored for retention. | `0` |

### Storage

The server storage type is configured under the `Repo` section. Currently we support the storage types `FileSystem` and `S3` with options varying depending on the type.

```json
...
"Repo": {
  "StorageType": "FileSystem",
  "Options": {
    "Directory": "Repo"
  }
}
...
```

```json
...
"Repo": {
    "StorageType": "S3",
    "Options": {
      "Endpoint": "localhost:9000",
      "AccessKey": "bomserver-minioadmin",
      "SecretKey": "bomserver-minioadmin",
      "ForcePathStyle": true,
      "UseHttp": false,
      "BucketName": "bomserver"
  }
}
...
```

## Authentication and Authorization

Authentication and authorization are expected to be configured at the web
server or API gateway level.

For simplicity of deployment the allowed methods can be configured, and
default to safe options (everything is forbidden by default).

It is recommended to deploy two instances of the BOM repository server.

One, requiring authentication and additional security controls, with
GET and POST methods permitted to support publishing BOMs.

And a second instance, public facing, with only the GET method enabled. And
authentication configured if required.

More advanced authentication and authorization use cases should be handled
with a solution like an API gateway. And are considered out of scope of
this project.

NOTE: It is recommended,
subject to your operational environment and risk profile,
to not require authentication for public facing instances.
This enables downstream consumers,
who might not have a direct commercial arrangement with your organization,
to retrieve BOMs.

## System Requirements

The CycloneDX BOM Repository Server has been designed as a lightweight,
high performance, BOM repository server.
Any production web server should be capable of running it.

However, there is an in memory cache of BOM metadata.
Memory requirements will differ based on the amount of BOM metadata that requires caching.

All BOMs are converted to Protocol Buffer format before storage for efficiency.

As an alternative to the Docker image,
the server can be hosted using Nginx, Apache, IIS, or Kestrel.
More information can be found in the
[Web server implementations in ASP.NET Core](https://docs.microsoft.com/en-us/aspnet/core/fundamentals/servers/?view=aspnetcore-6.0&tabs=linux)
documentation.

## High Availability Deployments

The server supports sharing repository storage between multiple
frontend instances. Which can be used for full active/active
high availability clustering.

When deploying to multiple data centres it is recommended to have
one master instance that supports publishing BOMs. And use data
replication to any other target data centres used for distributing BOMs.

## BOM Metadata Cache & Searching

To support high performance searching, there is an in memory cache of BOM metadata.

This cache is initially populated during startup and updated by a background
thread every 10 minutes. For this reason, a newly published BOM may not
immediately be returned in search results.

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