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Format agnostic SBOM tooling

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__bomctl__ is format-agnostic Software Bill of Materials (SBOM) tooling, which is intended to bridge the gap between SBOM generation and SBOM analysis tools. It focuses on supporting more complex SBOM operations on multiple SBOM files that represent systems by being opinionated on only supporting the [NTIA minimum fields](https://www.ntia.doc.gov/files/ntia/publications/sbom_minimum_elements_report.pdf) or other fields supported by [protobom](https://github.com/protobom/protobom).

- [Try `bomctl` in our gitpod playground](https://gitpod.io/?autostart=true#https://github.com/bomctl/bomctl-playground)

> [!NOTE]
> This is an experimental project under active development. We'd love feedback on the concept, scope, and architecture!

## Features

- Work with multiple SBOMs in tree structures (through external references)
- Fetch and push SBOMs using multiple supported protocols
- Leverage a `.netrc` file to handle authentication
- Manage SBOMs using a persistent database cache
- __FUTURE__ - Manipulate SBOMs with commands like `diff`, `split`, and `redact`
- __FUTURE__ - Interface with other OpenSSF projects and services like [GUAC](https://guac.sh/) and [Sigstore](https://www.sigstore.dev/)

## Join our Community

- [#bomctl on OpenSSF Slack](https://openssf.slack.com/archives/C06ED5VB81W)
- [OpenSSF Security Tooling Working Group Meeting](https://zoom-lfx.platform.linuxfoundation.org/meeting/94897563315?password=7f03d8e7-7bc9-454e-95bd-6e1e09cb3b0b) - Every other Friday at 11am Eastern / 8am Pacific

## Installation

### Homebrew

```shell
brew tap bomctl/bomctl && brew install bomctl
```

### Container Images

Container images for bomctl can be found on [Docker Hub](https://hub.docker.com/r/bomctl/bomctl).

``` shell
docker run bomctl/bomctl:latest --help
```

### Install From Source

To install bomctl, you need the following:

- [Go](https://go.dev/dl)
- [Git](https://git-scm.com/downloads)
- One of:
  - [Make](https://www.gnu.org/software/make/manual/make.html)
  - [Task](https://taskfile.dev)

#### Clone the bomctl repository

```shell
git clone https://github.com/bomctl/bomctl.git
cd bomctl
```

#### Build using `make` or `task`

## Commands

`bomctl` stores SBOMs in a cache database, this allows more complex cross SBOM document operations to exist. This is a fundemental concept; files are not directly modified, the cache is.

`bomctl` uses the [protobom library](https://github.com/protobom/protobom) to store the SBOM component graph in an SBOM agnostic format. When you interact with the `bomctl` cache, you are interacting with the [protobom library](https://github.com/protobom/protobom).

- SBOMs are read and loaded into the cache
  - [fetch](#fetch)
  - [import](#import)
- Operations are performed on the cached SBOMs
  - [alias](#alias)
  - [list](#list)
  - [merge](#merge)
  - [tag](#tag)
- SBOMs are outputted out of the cache
  - [export](#export)
  - [push](#push)

### Alias

Edit the alias for an SBOM document.

> [!NOTE]
> An SBOM document can only have a single alias and each alias must be globally unique.

```shell
bomctl alias [command]

Subcommands:
  list        List all alias definitions
  remove      Remove the alias for a specific document
  set         Set the alias for a specific document

Flags:
  -h, --help   help for alias
```

### Export

Export stored SBOM(s) to filesystem

```shell
bomctl export [flags] SBOM_ID...

Flags:
  -e, --encoding CHOICE    Output encoding ('xml' supported for CycloneDX formats only) [json, xml] (default json)
  -f, --format CHOICE      Output format [original, spdx, spdx-2.3, cyclonedx, cyclonedx-1.0, cyclonedx-1.1, cyclonedx-1.2, cyclonedx-1.3, cyclonedx-1.4, cyclonedx-1.5, cyclonedx-1.6] (default original)
  -h, --help               help for export
  -o, --output-file FILE   Path to output file
```

### Fetch

Ability to retrieve SBOM files over several protocols and web APIs, including HTTPS, OCI, Git, GitHub, and GitLab.

```shell
bomctl fetch [flags] SBOM_URL...

Flags:
      --alias string       Readable identifier to apply to document
  -h, --help               help for fetch
      --netrc              Use .netrc file for authentication to remote hosts
  -o, --output-file FILE   Path to output file
      --tag stringArray    Tag(s) to apply to document (can be specified multiple times)
```

This includes recursive loading of external references in an SBOM to other SBOMs and placing them into the persistent cache. If SBOMs are access controlled, a user's [.netrc](https://www.gnu.org/software/inetutils/manual/html_node/The-_002enetrc-file.html) file can be used to authenticate.

The following example will fetch this [CycloneDX SBOM](https://raw.githubusercontent.com/bomctl/bomctl-playground/main/examples/bomctl-container-image/bomctl_bomctl_v0.3.0.cdx.json)
that represents a container image and will then recursively fetch an externally referenced SBOM that
represents an application within the container image.

```shell
bomctl fetch https://raw.githubusercontent.com/bomctl/bomctl-playground/main/examples/bomctl-container-image/bomctl_bomctl_v0.3.0.cdx.json
```

Alternatively, use the following syntax to directly fetch the most recent dependency graph SBOM of a GitHub repository (In this case, the bomctl repository). This syntax works for both public and private repositories, although credentials will need to be provided via `--netrc` to access a private repo.

```shell
bomctl fetch https://github.com/bomctl/bomctl
```

An SBOM may also be fetched from a GitLab repository through the [DependencyListExport web API](https://docs.gitlab.com/ee/api/dependency_list_export.html) by using the following URL format. Authorization for this command is configured by assigning the value of your GitLab token to the `BOMCTL_GITLAB_TOKEN` environment variable.

```shell
bomctl fetch https://www.gitlab.com/PROJECT/REPOSITORY@BRANCH
```

### Import

Import SBOM files from either standard input or the local file system.

```shell
bomctl import [flags] { - | FILE...}

Flags:
      --alias stringArray   Readable identifier(s) to apply to imported document(s) (specify multiple times for multiple documents)
  -h, --help                help for import
      --tag stringArray     Tag(s) to apply to all imported documents (can be specified multiple times)
```

### Link

Edit links between documents and/or nodes

```shell
bomctl link [command]

Subcommands:
  add         Add a link from a document or node to a document
  clear       Remove all links from specified documents and nodes
  list        List the links of a document or node
  remove      Remove specified links from a document or node

Flags:
  -h, --help          help for link
  -t, --type CHOICE   Type referenced by SRC_ID [node, document] (default node)
```

### List

List cached SBOM documents.

```shell
bomctl list [flags] SBOM_ID...

Aliases:
  list, ls

Flags:
  -h, --help              help for list
      --tag stringArray   Tag(s) used to filter documents (can be specified multiple times)
```

### Merge

Merge specified cached SBOM documents.

```shell
bomctl merge [flags] DOCUMENT_ID...

Flags:
      --alias string      Readable identifier to apply to merged document
  -h, --help              help for merge
  -n, --name string       Name of merged document
      --tag stringArray   Tag(s) to apply to merged document (can be specified multiple times)
```

### Push

Push stored SBOM file to remote URL or filesystem

```shell
bomctl push [flags] SBOM_ID DEST_PATH

Flags:
  -e, --encoding CHOICE   Output encoding ('xml' supported for CycloneDX formats only) [json, xml] (default json)
  -f, --format CHOICE     Output format [original, spdx, spdx-2.3, cyclonedx, cyclonedx-1.0, cyclonedx-1.1, cyclonedx-1.2, cyclonedx-1.3, cyclonedx-1.4, cyclonedx-1.5, cyclonedx-1.6] (default original)
  -h, --help              help for push
      --netrc             Use .netrc file for authentication to remote hosts
      --tree              Recursively push all SBOMs in external reference tree
```

An SBOM may be pushed as a package to a GitLab repository through the [Generic Package Registry web API](https://docs.gitlab.com/ee/user/packages/generic_packages) by using the following URL format. Authorization for this command is configured by assigning the value of your GitLab token to the `BOMCTL_GITLAB_TOKEN` environment variable.

```shell
bomctl push SBOM_ID_OR_ALIAS https://www.gitlab.com/PROJECT/REPOSITORY#PACKAGE_NAME@PACKAGE_VERSION
```

### Tag

Edit the tags of an SBOM document.

```shell
bomctl tag [command]

Subcommands:
  add         Add tags to a document
  clear       Clear all tags from a document
  list        List the tags of a document
  remove      Remove specified tags from a document

Flags:
  -h, --help  help for tag
```

## Roadmap

The project is focused on building an architecture that enables reading in, operating on, and reading
out collections of SBOM files independent of format. This project requires an architecture that
prioritizes the relationships between components in a SBOM document and between SBOM documents.

- [Complete Roadmap](ROADMAP.md)

Once this architecture is established, more complex operations can be implemented. This operations include:

- `diff`
  - Generating diffs between components and component dependencies
  - Generating diffs of component properties
  - Creating diffs in machine readable and human readable formats
- `enrich`
  - Use the [Transparency Exchange API](https://github.com/CycloneDX/transparency-exchange-api) to find enrich sbom components with additional data.
  - Interface with [GUAC](https://guac.sh/)
- `merge`
  - Merge fields from similar components in two or more SBOM documents
  - Merge components and component dependencies from two or more SBOM documents
  - Flatten multiple SBOM document component dependencies into a single SBOM document
- `redact`
  - Redact fields by regular expressions or field name while keeping traceability to the original document
- `split`
  - Split an SBOM dependency tree into multiple files based on purl type or component identifier
- `trim`
  - Trim an SBOM dependency tree based on purl type or component identifier
- __Your suggestions too!__

We use [Architecture Decision Records](docs/architecture/README.md) to track key decisions on the architecture and implementation details of `bomctl`. Decisions that are proposed but not finalized have the [adr label](https://github.com/bomctl/bomctl/labels/adr).

## Similar Projects

- [Kubernetes bom](https://github.com/kubernetes-sigs/bom) is a utility that lets you create, view and transform Software Bills of Materials (SBOMs). bom was created as part of the project to create an SBOM for the Kubernetes project. It enables software authors to generate an SBOM for their projects in a simple, yet powerful way.
- [CycloneDX sbom-utility](https://github.com/CycloneDX/sbom-utility) was designed to be an API platform to validate, analyze and edit Bills-of-Materials (BOMs). Initially, it was created to validate either CycloneDX or SPDX-formatted BOMs against official, versioned JSON schemas as published by their respective standards communities.
- [Hoppr](https://hoppr.dev/) is a Python plugin-based framework for collecting, processing, and bundling your software supply chain.
- [sbommerge](https://github.com/anthonyharrison/sbommerge) merges two Software Bill of Materials (SBOMs) documents together. It supports SBOMs created in both SPDX and CycloneDX formats.

## Verifying Integrity

### Verifying Container Images

Container images for `bomctl` can be found [here](https://hub.docker.com/r/bomctl/bomctl) and are signed
using keyless signing with cosign.

You can then verify this container image with cosign.

``` shell
cosign verify --certificate-oidc-issuer https://token.actions.githubusercontent.com --certificate-identity-regexp 'https://github\.com/bomctl/bomctl/\.github/.+'  bomctl/bomctl:latest
```

### Verifying Releases

`bomctl` releases can be found [here](https://github.com/bomctl/bomctl/releases) and are signed
using keyless signing with cosign.

You can then verify this artifact with cosign.

``` shell
cosign verify-blob --certificate ${artifact}-keyless.pem --signature ${artifact}-keyless.sig --certificate-oidc-issuer https://token.actions.githubusercontent.com --certificate-identity-regexp 'https://github\.com/bomctl/bomctl/\.github/.+'  ${artifact}
```

If the result is `Verified OK`, the verification is successful.

You can also look up the entry in the public Rekor instance using a sha256 hash.

``` shell
shasum -a 256 bomctl_SNAPSHOT-3f16bdb_checksums.txt |awk '{print $1}'
```

The printed `hash` can be used to look up the entry at <https://search.sigstore.dev/>.

> Copyright © bomctl a Series of LF Projects, LLC
> For web site terms of use, trademark policy and other project policies
> please see <https://lfprojects.org>.

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