<?xml version="1.0" encoding="UTF-8"?>        <rss version="2.0"
             xmlns:atom="http://www.w3.org/2005/Atom"
             xmlns:dc="http://purl.org/dc/elements/1.1/"
             xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
             xmlns:admin="http://webns.net/mvcb/"
             xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
             xmlns:content="http://purl.org/rss/1.0/modules/content/">
        <channel>
            <title>
									SBOM Generation and Artifact Signing - openclawsecurity.net Forum				            </title>
            <link>https://openclawsecurity.net/community/sbom-and-artifact-signing/</link>
            <description>openclawsecurity.net Discussion Board</description>
            <language>en-US</language>
            <lastBuildDate>Fri, 14 Aug 2026 19:15:48 +0000</lastBuildDate>
            <generator>wpForo</generator>
            <ttl>60</ttl>
							                    <item>
                        <title>ELI5: How does keyless signing actually work? Where&#039;s the key?</title>
                        <link>https://openclawsecurity.net/community/sbom-and-artifact-signing/eli5-how-does-keyless-signing-actually-work-wheres-the-key/</link>
                        <pubDate>Wed, 15 Jul 2026 14:00:47 +0000</pubDate>
                        <description><![CDATA[I&#039;ve been reading up on artifact signing, trying to set up a proper pipeline for my self-hosted agents. The traditional workflow with long-lived keys always made me nervous — key storage, ro...]]></description>
                        <content:encoded><![CDATA[I've been reading up on artifact signing, trying to set up a proper pipeline for my self-hosted agents. The traditional workflow with long-lived keys always made me nervous — key storage, rotation, and revocation seem like a lot of moving parts for a beginner like me.

Then I keep seeing "keyless signing" mentioned, especially with Sigstore. I understand the general promise: you prove your identity (like via a GitHub OIDC token) and get a short-lived certificate to sign something. The artifact gets signed, and the proof is stored in a transparency log.

But here's my mental block: if it's "keyless," what actually creates the cryptographic signature? There must be a private key involved *somewhere*, even for a short time, right? Is it generated ephemerally on my machine, used once, and thrown away? And if so, who or what is the trusted party that issues the short-lived certificate binding that ephemeral key to my identity?

I guess I'm trying to map the "keyless" term to the concrete steps. A simple example of the flow, pointing out where that temporary key material lives and dies, would really help me trust the process before I try to implement it.

Paul]]></content:encoded>
						                            <category domain="https://openclawsecurity.net/community/sbom-and-artifact-signing/">SBOM Generation and Artifact Signing</category>                        <dc:creator>Paul D.</dc:creator>
                        <guid isPermaLink="true">https://openclawsecurity.net/community/sbom-and-artifact-signing/eli5-how-does-keyless-signing-actually-work-wheres-the-key/</guid>
                    </item>
				                    <item>
                        <title>How do I get a software bill of materials for the entire Claw toolchain?</title>
                        <link>https://openclawsecurity.net/community/sbom-and-artifact-signing/how-do-i-get-a-software-bill-of-materials-for-the-entire-claw-toolchain/</link>
                        <pubDate>Tue, 14 Jul 2026 16:00:45 +0000</pubDate>
                        <description><![CDATA[Hey everyone, I&#039;m really excited to be here and to finally dive into the Open Claw ecosystem! I&#039;ve been reading through the docs and the forum posts, and the whole concept of AI agents runni...]]></description>
                        <content:encoded><![CDATA[Hey everyone, I'm really excited to be here and to finally dive into the Open Claw ecosystem! I've been reading through the docs and the forum posts, and the whole concept of AI agents running on my own hardware is just... wow. But I have to admit, I'm feeling a bit overwhelmed by the security aspects, especially after reading the recent announcement about the focus on SBOMs and signing.

My goal is to set up a small agent runtime on a Raspberry Pi I have, basically for personal task automation. I understand the *why*—I shouldn't just run a bunch of code from the internet without knowing what's in it. But the *how* is where I'm totally lost.

Specifically, I'm trying to wrap my head around getting a complete software bill of materials for the entire Claw toolchain. When I look at the installation, it seems like it pulls in so many pieces: the core framework, the different agent modules, the language models (if I host my own), the dependencies... it feels like a tree with a million branches. How do I even start cataloging all of that?

Do I need to generate an SBOM for each component separately? Is there a master tool or script that can look at my final deployment directory and just tell me everything that's in there? I've seen tools like `syft` mentioned, but I'm not sure if I run it against my Python virtual environment, against the Docker image (if I go that route), or against the source code I've cloned. And then, once I have this big list of components, what do I actually *do* with it? How does it help me on my little Pi?

I'm also a bit confused about the order of operations. Should I generate the SBOM *before* I sign the artifacts, or does the SBOM itself get signed as one of the artifacts? I want to do this right, but I'm starting from a place of genuine humility here—my Linux skills are pretty basic. Any guidance on the first concrete steps would be incredibly appreciated. Maybe a walkthrough of the very first thing I should type into my terminal after installing the core Claw software? Thanks in advance for your patience with a newcomer]]></content:encoded>
						                            <category domain="https://openclawsecurity.net/community/sbom-and-artifact-signing/">SBOM Generation and Artifact Signing</category>                        <dc:creator>Neo Zhang</dc:creator>
                        <guid isPermaLink="true">https://openclawsecurity.net/community/sbom-and-artifact-signing/how-do-i-get-a-software-bill-of-materials-for-the-entire-claw-toolchain/</guid>
                    </item>
				                    <item>
                        <title>Thoughts on using Tekton chains for signing Claw pipeline outputs?</title>
                        <link>https://openclawsecurity.net/community/sbom-and-artifact-signing/thoughts-on-using-tekton-chains-for-signing-claw-pipeline-outputs/</link>
                        <pubDate>Mon, 13 Jul 2026 08:01:07 +0000</pubDate>
                        <description><![CDATA[Having spent the last week instrumenting our `ironclaw` agent&#039;s eBPF probes for syscall latency, I was pulled into a cross-team discussion on artifact signing. The immediate question was abo...]]></description>
                        <content:encoded><![CDATA[Having spent the last week instrumenting our `ironclaw` agent's eBPF probes for syscall latency, I was pulled into a cross-team discussion on artifact signing. The immediate question was about using `cosign` standalone, but it got me thinking about the broader pipeline. We use Tekton for our CI/CD, and Tekton Chains exists specifically to sign pipeline outputs. I've been evaluating its suitability for our Open Claw agent deployments, particularly for signing the final SBOMs and agent binaries that will be shipped to customer nodes.

The appeal is clear: Chains automates the signing of *everything* a TaskRun produces, capturing a cryptographic record of the entire execution context (source revisions, base images, params) into a signed attestation. For a security-focused project like ours, this provenance is gold. Imagine a signed in-toto attestation that states: "This `nano_claw` module (digest: sha256:...) was built from this commit, using this base image, by this pipeline, at this time." That's a powerful chain of custody for runtime verification.

However, integration has nuances. Chains signs artifacts by watching TaskRuns and pushing signatures to an OCI registry. Our output isn't just container images; it's also raw binaries and SPDX SBOMs. This requires configuring the `output` and `artifacts` sections of the Chains config carefully. For example, to ensure our agent binary (built by a `go-build` task) and its accompanying SBOM (from a `syft` task) are both signed, we need to explicitly define them as `artifacts.oci` or `artifacts.taskrun` objects. The signing key management via Sigstore's Fulcio and Rekor is a major benefit, but we must ensure our pipeline's internal steps (like eBPF verifier log collection) don't leak into the attestation if they're irrelevant to the final artifact's security claims.

Here's a simplified snippet of a Tekton Task definition that Chains would later sign. The critical part is the `results` and `images` that Chains will pick up.

```yaml
apiVersion: tekton.dev/v1beta1
kind: Task
metadata:
  name: build-claw-agent
spec:
  results:
    - name: IMAGE_URL
      description: The URL of the image built
    - name: IMAGE_DIGEST
      description: The digest of the image built
  steps:
    - name: build-binary
      image: golang:1.21
      script: |
        # ... build script for ironclaw agent ...
        echo "Built binary: ./bin/ironclaw"
    - name: generate-sbom
      image: anchore/syft:latest
      script: |
        syft ./bin/ironclaw -o spdx-json &gt; sbom.json
    - name: build-and-push
      image: gcr.io/kaniko-project/executor:v1.9.0
      args:
        - --dockerfile=Dockerfile
        - --destination=$(params.IMAGE_REPO):$(params.TAG)
        - --digest-file=/tekton/results/IMAGE_DIGEST
```

Chains would sign the resulting TaskRun, creating attestations for the image digest and the SBOM file, storing them in Rekor. The verification then becomes a matter of using `cosign verify-attestation` or integrating with a policy engine like Kyverno in the deployment cluster before the agent DaemonSet is applied.

My primary concern is the attestation's granularity and whether it captures enough of our low-level build dependencies (specific kernel header versions, libbpf source hash) to be truly reproducible for a security audit. The pipeline's own integrity is paramount; if the Tekton cluster is compromised, Chains' signatures are worthless. This leads to the classic root-of-trust problem. I'm leaning towards implementing it, but with a strict requirement for offline key signing for our final release artifacts, using Chains for staging, and a manual, air-gapped signing step for production. Keen to hear if anyone has tackled similar concerns, especially with eBPF-based workloads where the runtime kernel version is a critical, but often unstated, dependency in the SBOM.

~ jay]]></content:encoded>
						                            <category domain="https://openclawsecurity.net/community/sbom-and-artifact-signing/">SBOM Generation and Artifact Signing</category>                        <dc:creator>Jay Kernel</dc:creator>
                        <guid isPermaLink="true">https://openclawsecurity.net/community/sbom-and-artifact-signing/thoughts-on-using-tekton-chains-for-signing-claw-pipeline-outputs/</guid>
                    </item>
				                    <item>
                        <title>Walkthrough: Adding artifact signing to our existing Claw deployment pipeline.</title>
                        <link>https://openclawsecurity.net/community/sbom-and-artifact-signing/walkthrough-adding-artifact-signing-to-our-existing-claw-deployment-pipeline/</link>
                        <pubDate>Mon, 13 Jul 2026 05:00:18 +0000</pubDate>
                        <description><![CDATA[Our current Claw deployment pipeline, as documented in the internal wiki, performs automated Software Bill of Materials (SBOM) generation using Syft for container images. This provides neces...]]></description>
                        <content:encoded><![CDATA[Our current Claw deployment pipeline, as documented in the internal wiki, performs automated Software Bill of Materials (SBOM) generation using Syft for container images. This provides necessary transparency, but it represents only half of the attestation chain. A generated SBOM is only as trustworthy as its source artifact and the process that created it. Without cryptographic signing, we cannot assert provenance or guarantee integrity for downstream consumers, such as our internal policy engines or external auditors.

This walkthrough will extend our existing GitHub Actions workflow to sign both the container image and its associated SBOM using the Sigstore stack (Cosign, Fulcio, Rekor). The goal is to produce a verifiable, tamper-evident record from build to deployment, which is critical for our agent runtime deployments where compromised artifacts could lead to significant policy violations or data exfiltration.

We will modify the pipeline in three distinct phases:

1.  **Signing the Container Image:** We will use Cosign to sign the image immediately after it is pushed to our registry. This signature, bound to a short-lived certificate from Fulcio, will be recorded in the Rekor transparency log.
2.  **Signing and Attaching the SBOM:** The Syft-generated SBOM will be signed as a separate artifact, and also attached to the container image as a signed attestation, creating an immutable link.
3.  **Verification Step:** A final verification step will be added to demonstrate how a consumer (e.g., a deployment or auditing job) can verify both the image signature and its SBOM before use.

Here is the relevant addition to the existing workflow YAML, focusing on the new steps. I have omitted the prior Syft and build steps for brevity.

```yaml
# ... existing build and Syft SBOM generation steps ...

    - name: Sign Container Image
      uses: sigstore/cosign-installer@v3
      with:
        cosign-release: 'v2.2.0'
    - run: |
        cosign sign --yes 
          --key env://COSIGN_PRIVATE_KEY 
          ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.TAG }}
      env:
        COSIGN_PRIVATE_KEY: ${{ secrets.COSIGN_PRIVATE_KEY }}
        COSIGN_PASSWORD: ${{ secrets.COSIGN_PASSWORD }}

    - name: Sign SBOM &amp; Attach as Attestation
      run: |
        # Sign the SBOM file itself
        cosign sign-blob --yes 
          --key env://COSIGN_PRIVATE_KEY 
          --bundle sbom.${{ env.TAG }}.sig 
          ./sbom.spdx.json

        # Attach the SBOM as a signed attestation to the image
        cosign attest --yes 
          --key env://COSIGN_PRIVATE_KEY 
          --predicate ./sbom.spdx.json 
          --type spdx 
          ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.TAG }}

    - name: Verify Artifacts (Example)
      run: |
        # Verify the image signature
        cosign verify 
          --certificate-identity-regexp '^https://github.com/OpenClawSecurity/.*' 
          --certificate-oidc-issuer 'https://token.actions.githubusercontent.com' 
          ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.TAG }}

        # Verify the attached SBOM attestation
        cosign verify-attestation 
          --type spdx 
          --certificate-identity-regexp '^https://github.com/OpenClawSecurity/.*' 
          --certificate-oidc-issuer 'https://token.actions.githubusercontent.com' 
          ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.TAG }}

        # Retrieve and verify the standalone SBOM signature bundle
        cosign verify-blob 
          --bundle sbom.${{ env.TAG }}.sig 
          --certificate-identity-regexp '^https://github.com/OpenClawSecurity/.*' 
          --certificate-oidc-issuer 'https://token.actions.githubusercontent.com' 
          ./sbom.spdx.json
```

**Key Threat Model Considerations:**

*   The use of keyless signing (via the `COSIGN_PRIVATE_KEY` stored in GitHub Secrets) ties the signature to the specific workflow run via OpenID Connect, mitigating the risk of long-lived credential compromise. The identity checks in the verification steps (`--certificate-identity-regexp`) are crucial to prevent impersonation.
*   Recording signatures in the Rekor public ledger provides non-repudiation and allows external parties to audit the signing events without accessing our internal systems.
*   The SBOM is now a *signed predicate* within an in-toto attestation, cryptographically binding it to the exact image that was built. This prevents an attacker from substituting a vulnerable component list for a patched image.

The next logical step for our deployment is to integrate this verification into our agent orchestration system (e.g., Kubernetes admission controller via policy-controller) to enforce that only signed, attested workloads are permitted to execute. I will prepare a separate thread on that integration if there is interest.

-K]]></content:encoded>
						                            <category domain="https://openclawsecurity.net/community/sbom-and-artifact-signing/">SBOM Generation and Artifact Signing</category>                        <dc:creator>Dr. Keiko Tanaka</dc:creator>
                        <guid isPermaLink="true">https://openclawsecurity.net/community/sbom-and-artifact-signing/walkthrough-adding-artifact-signing-to-our-existing-claw-deployment-pipeline/</guid>
                    </item>
				                    <item>
                        <title>Did you see Anchore&#039;s new tool? Claims to verify SBOM signatures.</title>
                        <link>https://openclawsecurity.net/community/sbom-and-artifact-signing/did-you-see-anchores-new-tool-claims-to-verify-sbom-signatures/</link>
                        <pubDate>Sat, 11 Jul 2026 14:00:21 +0000</pubDate>
                        <description><![CDATA[A colleague forwarded me the announcement regarding Anchore&#039;s new signature verification capability for SBOMs. While any advancement in tooling that promotes artifact integrity is welcome, I...]]></description>
                        <content:encoded><![CDATA[A colleague forwarded me the announcement regarding Anchore's new signature verification capability for SBOMs. While any advancement in tooling that promotes artifact integrity is welcome, I find the framing somewhat problematic from a supply chain security perspective. The core claim appears to be that the tool can verify the signature on an SBOM file itself. This is, of course, a fundamental and necessary step, but it represents only a single, initial link in a much longer chain of attestations required for trustworthy deployment.

The critical question it prompts is: what, precisely, is being signed and verified? An SBOM is a statement of contents. Verifying its signature establishes that a particular entity authored that statement. However, this does not, by itself, provide any guarantee about the integrity of the artifacts *listed* within the SBOM. For a complete attestation, we must connect three signed elements:

*   **The Artifact:** The binary or container image must be signed, for example using Sigstore's `cosign`.
*   **The SBOM:** The Software Bill of Materials for that artifact must be signed.
*   **The Relationship:** A signed attestation (e.g., an in-toto link or a SPDX Relationship) must bind the SBOM to the specific, signed artifact.

Without this final link, a verified SBOM is an orphaned statement. One could verify a perfectly valid SBOM for `my-agent:v1.0`, but the actual `my-agent:v1.0` container running in production could be a completely different, unsigned, and potentially malicious artifact. The SBOM's verification would pass, creating a false sense of security.

The proper pattern for agent frameworks, which this tool could potentially fit into, should enforce a workflow similar to the following:

```bash
# 1. Sign the artifact (container image)
cosign sign --key cosign.key myregistry.io/agent-runtime:v1.2.3

# 2. Generate and sign an SBOM *attestation* for that artifact
cosign attest --key cosign.key --predicate sbom.json --type spdx myregistry.io/agent-runtime:v1.2.3

# 3. Verification must check both the artifact signature and the SBOM attestation
cosign verify --key cosign.pub myregistry.io/agent-runtime:v1.2.3
cosign verify-attestation --key cosign.pub --type spdx myregistry.io/agent-runtime:v1.2.3
```

Does Anchore's tool facilitate the creation and verification of this three-part link, or does it solely stop at the SBOM file signature? If it is the latter, then it addresses a technical feature but misses the architectural requirement for a reproducible, auditable supply chain. I am interested in examining its integration potential with existing signing and attestation frameworks like Sigstore and in-toto, which are designed to establish these critical provenance graphs.]]></content:encoded>
						                            <category domain="https://openclawsecurity.net/community/sbom-and-artifact-signing/">SBOM Generation and Artifact Signing</category>                        <dc:creator>Fatima Al-Jaber</dc:creator>
                        <guid isPermaLink="true">https://openclawsecurity.net/community/sbom-and-artifact-signing/did-you-see-anchores-new-tool-claims-to-verify-sbom-signatures/</guid>
                    </item>
				                    <item>
                        <title>SBOM generation for Claw failing on transitive dependencies. Help?</title>
                        <link>https://openclawsecurity.net/community/sbom-and-artifact-signing/sbom-generation-for-claw-failing-on-transitive-dependencies-help/</link>
                        <pubDate>Fri, 10 Jul 2026 21:00:03 +0000</pubDate>
                        <description><![CDATA[Hey everyone, I’ve been trying to generate an SBOM for our Claw agent deployments following the docs, but I keep hitting a wall with transitive dependencies. I’m using the `syft` command the...]]></description>
                        <content:encoded><![CDATA[Hey everyone, I’ve been trying to generate an SBOM for our Claw agent deployments following the docs, but I keep hitting a wall with transitive dependencies. I’m using the `syft` command they recommend, targeting the container image we build for our agents.

The issue is that it seems to only capture the direct OS packages (like the base image packages from Alpine) and the main Go binary, but it’s missing a ton of the Go modules we pull in indirectly. I’m especially worried about the runtime monitoring libraries and the eBPF-related dependencies—those are critical for us to track.

Here’s what I’m running:
`syft our-registry/claw-agent:v1.2.3 -o spdx-json &gt; sbom.json`

The output is missing things like `github.com/cilium/ebpf` and `github.com/elastic/go-libaudit`, which I know are in the final binary from the build logs. I’m guessing this is because we’re scanning the final image, not the build stage? Should I be generating the SBOM during the multi-stage build instead, maybe right after the `go mod vendor` step?

Also, how are you all handling signing these SBOMs afterwards? I’ve been looking at Sigstore’s `cosign` for signing the image, but do I sign the SBOM as a separate artifact, or attach it somehow? I want to make sure the entire stack, from the base image up to our code, is verifiable before we roll out agents to new hosts.

Any tips from the team who’ve already set this up in production? &#x1f605; I really don’t want to ship something without a complete software bill of materials, especially with the runtime security focus we have.]]></content:encoded>
						                            <category domain="https://openclawsecurity.net/community/sbom-and-artifact-signing/">SBOM Generation and Artifact Signing</category>                        <dc:creator>Phil R.</dc:creator>
                        <guid isPermaLink="true">https://openclawsecurity.net/community/sbom-and-artifact-signing/sbom-generation-for-claw-failing-on-transitive-dependencies-help/</guid>
                    </item>
				                    <item>
                        <title>Comparing the overhead of SBOM generation for small vs large deployments.</title>
                        <link>https://openclawsecurity.net/community/sbom-and-artifact-signing/comparing-the-overhead-of-sbom-generation-for-small-vs-large-deployments/</link>
                        <pubDate>Thu, 09 Jul 2026 14:00:21 +0000</pubDate>
                        <description><![CDATA[Hello everyone,

I&#039;ve been working through our SBOM generation pipeline for agent deployments, and I wanted to share some concrete observations about the computational and time overhead invo...]]></description>
                        <content:encoded><![CDATA[Hello everyone,

I've been working through our SBOM generation pipeline for agent deployments, and I wanted to share some concrete observations about the computational and time overhead involved. The difference between generating an SBOM for a single, simple agent container and for a full deployment with multiple services and dependencies is more significant than I initially anticipated. This isn't just about the raw file size; it's about the entire process of dependency resolution, data serialization, and format choice.

Let's break down the overhead into a few key areas:

*   **Dependency Graph Resolution:** For a small deployment, your dependency tree might be shallow. A tool like `syft` scans a single container image quickly.
    ```bash
    # Scanning a minimal Python agent image
    syft packages python:3.11-slim -o spdx-json &gt; sbom.small.json
    ```
    For a large deployment, you might be scanning multiple complex images, a Helm chart with subcharts, or a directory with hundreds of transient development dependencies. The resolution time grows non-linearly as the tool walks deeper trees and collates data from disparate sources.

*   **Serialization and Format:** The choice of output format (SPDX, CycloneDX) and its specificity (tag-value, JSON) impacts generation time and file size. A large deployment's SBOM in SPDX JSON can become a massive file, and the serialization overhead is noticeable.
    ```python
    # Example: A simple script to time generation for a directory
    import subprocess
    import time

    start = time.time()
    result = subprocess.run(
        ,
        capture_output=True,
        text=True
    )
    end = time.time()
    print(f"Generation took: {end - start:.2f} seconds")
    print(f"Output lines: {len(result.stdout.splitlines())}")
    ```

*   **Pipeline Integration:** In a CI/CD context, the overhead compounds. For a small deployment, you can likely generate the SBOM on every commit without impacting feedback time. For a large deployment, you need to strategize—perhaps generating a detailed SBOM only on release tags, or using caching mechanisms for dependency data, and accepting that this stage will add minutes, not seconds, to your pipeline.

My question to the group is about optimization strategies. Have you found particular tools or flags that significantly reduce generation time for large, complex deployments without sacrificing essential detail? Is it more effective to generate a monolithic SBOM for the entire deployment, or to generate modular SBOMs per component and aggregate them later? I'm particularly interested in how this integrates with artifact signing, as the signing step also adds time, and the two processes need to be considered together in the deployment pipeline.

I'll be documenting my own findings in a repository, focusing on reproducible benchmarks with different toolchains. The goal is to provide clear guidance for newcomers on what to expect and how to design their SBOM generation stage efficiently, regardless of project scale.]]></content:encoded>
						                            <category domain="https://openclawsecurity.net/community/sbom-and-artifact-signing/">SBOM Generation and Artifact Signing</category>                        <dc:creator>Elena Rossi</dc:creator>
                        <guid isPermaLink="true">https://openclawsecurity.net/community/sbom-and-artifact-signing/comparing-the-overhead-of-sbom-generation-for-small-vs-large-deployments/</guid>
                    </item>
				                    <item>
                        <title>Am I the only one who finds the Sigstore documentation completely opaque?</title>
                        <link>https://openclawsecurity.net/community/sbom-and-artifact-signing/am-i-the-only-one-who-finds-the-sigstore-documentation-completely-opaque/</link>
                        <pubDate>Mon, 06 Jul 2026 09:01:23 +0000</pubDate>
                        <description><![CDATA[Okay, I have to get this off my chest. I&#039;ve spent the better part of a weekend trying to get a proper artifact signing and verification workflow going for my local agent runtime deployments,...]]></description>
                        <content:encoded><![CDATA[Okay, I have to get this off my chest. I've spent the better part of a weekend trying to get a proper artifact signing and verification workflow going for my local agent runtime deployments, using Sigstore. The goal was straightforward: sign the SBOMs and Python wheels I'm generating for my nano_claw experiments, so I can verify them before execution in a sandbox. But honestly? I found the official documentation a maze of abstract concepts and scattered tools. &#x1f605;

It felt like I needed to understand the entire cosmos of Fulcio, Rekor, and Cosign *theoretically* before I could even run a simple command. For someone like me who learns by doing and breaking things in the lab, this was a major hurdle. I just wanted a clear, practical sequence: "do this, then that, to sign this file. Then do this other thing, over there, to verify it." Instead, I found myself jumping between GitHub pages, blog posts, and CLI help texts that assumed a ton of prior context.

So, I started piecing it together through trial and error. For anyone else struggling, here's the concrete flow I finally got working for signing a simple SBOM (a cyclonedx JSON file in my case) and verifying it locally, without needing a full Kubernetes setup or anything too complex.

First, I installed `cosign` and made sure I had a key pair. The documentation makes a big deal about keyless signing, which is great for public projects, but for my internal lab stuff, I wanted to use a simple key pair first.

```bash
# Generate a key pair. This part was actually okay.
cosign generate-key-pair

# Sign my SBOM artifact. Took me a while to find the right syntax.
cosign sign --key cosign.key my-agent-sbom-1.0.0.json
```

But then, the verification kept failing! The issue was that `cosign` by default seems to expect the signature in a specific location and format. I had to explicitly tell it where my public key and the signature file were.

```bash
# This finally worked for verification
cosign verify --key cosign.pub my-agent-sbom-1.0.0.json
```

My bigger question is about integrating this into an automated pipeline for my agent frameworks. How are you all handling this? Are you embedding the signing step right after `cyclonedx-bom` or `syft` generates the SBOM? And for verification, are you doing it at the very start of your agent's bootstrap script, before any dependencies are loaded?

I also looked into Sigstore's keyless mode with GitHub Actions, but the chain of trust there (OIDC tokens, Fulcio certificates) still feels a bit magical. Has anyone successfully wired that up for private repositories or internal artifact registries?

I love the *idea* of Sigstore—it's clearly powerful. But the onboarding experience feels like it's aimed at people who already have a deep background in PKI, not at practitioners like us who are just trying to secure our AI agent deployments from the ground up. Maybe we can crowdsource a clearer, practical guide here? I'm happy to share my messy lab notes if it helps.]]></content:encoded>
						                            <category domain="https://openclawsecurity.net/community/sbom-and-artifact-signing/">SBOM Generation and Artifact Signing</category>                        <dc:creator>Aisha Khan</dc:creator>
                        <guid isPermaLink="true">https://openclawsecurity.net/community/sbom-and-artifact-signing/am-i-the-only-one-who-finds-the-sigstore-documentation-completely-opaque/</guid>
                    </item>
				                    <item>
                        <title>Troubleshooting &#039;invalid signature: crypto/rsa: verification error&#039;.</title>
                        <link>https://openclawsecurity.net/community/sbom-and-artifact-signing/troubleshooting-invalid-signature-crypto-rsa-verification-error/</link>
                        <pubDate>Sat, 04 Jul 2026 07:00:13 +0000</pubDate>
                        <description><![CDATA[Hey folks. Ran into this one last night while trying to deploy a new Nano Claw agent to my isolated workcell network. The artifact was signed with Sigstore&#039;s `cosign` and the verification st...]]></description>
                        <content:encoded><![CDATA[Hey folks. Ran into this one last night while trying to deploy a new Nano Claw agent to my isolated workcell network. The artifact was signed with Sigstore's `cosign` and the verification step on the deployment host threw this:

```
Error: invalid signature: crypto/rsa: verification error
```

I'm self-hosting the entire pipeline, so my immediate thought was a mismatch between the public key used for verification and the one that actually signed the artifact. But I'd stored the key pair in my secrets manager and was sure I was pulling the right one. &#x1f914;

Here's my basic flow and the command that failed:

1.  **Signing** (on the build box, separate subnet):
    ```bash
    cosign sign --key k8s://production/agent-signing-key agent-image:v1.2.3
    ```

2.  **Verification** (on the deployment host inside the workcell):
    ```bash
    cosign verify --key cosign.pub agent-image:v1.2.3
    ```
    *This is where it barked.*

**What I've checked already:**
*   The public key (`cosign.pub`) is definitely the one paired with the private key used to sign.
*   The artifact digest hasn't changed (pulled by digest for verification).
*   No trailing whitespace in the key file (a classic).

My current suspicion is around **key formats**. I exported the public key from the K8s secret for easier distribution to the deployment host. Could there be a PEM encoding issue? Or does `cosign verify` expect the key in a specific format when not using the keyless flow?

Has anyone else wrestling with a full zero-trust, self-hosted agent deployment hit this? I'll post my solution once I nail it down, but curious if the community has seen this `crypto/rsa: verification error` before and what the root cause was.

Lee]]></content:encoded>
						                            <category domain="https://openclawsecurity.net/community/sbom-and-artifact-signing/">SBOM Generation and Artifact Signing</category>                        <dc:creator>Lee H.</dc:creator>
                        <guid isPermaLink="true">https://openclawsecurity.net/community/sbom-and-artifact-signing/troubleshooting-invalid-signature-crypto-rsa-verification-error/</guid>
                    </item>
				                    <item>
                        <title>Comparing Syft and cyclonedx-cli for Claw SBOM generation. Details inside.</title>
                        <link>https://openclawsecurity.net/community/sbom-and-artifact-signing/comparing-syft-and-cyclonedx-cli-for-claw-sbom-generation-details-inside/</link>
                        <pubDate>Fri, 03 Jul 2026 22:00:21 +0000</pubDate>
                        <description><![CDATA[Hey folks. We&#039;ve been standardizing our SBOM pipeline for Claw deployments and narrowed the tooling choice down to two main contenders: Syft and cyclonedx-cli. Both can output CycloneDX, whi...]]></description>
                        <content:encoded><![CDATA[Hey folks. We've been standardizing our SBOM pipeline for Claw deployments and narrowed the tooling choice down to two main contenders: Syft and cyclonedx-cli. Both can output CycloneDX, which is our format of choice for ingestion into our artifact registry.

Here’s a quick breakdown of our experience so far:

**Syft**
*   Great for direct container image and filesystem scanning. It just *understands* containers.
*   Generates SBOMs from a huge variety of package ecosystems out of the box.
*   The CLI is straightforward. For our base agent image, it's as simple as:
    ```bash
    syft claw-agent:latest -o cyclonedx-json &gt; sbom.claw-agent.cdx.json
    ```
*   We found it particularly good at picking up OS packages (deb, rpm, apk) alongside language-specific dependencies, which is crucial for our runtime.

**cyclonedx-cli**
*   More of a format-focused tool and converter. It's excellent if you have existing SBOMs or need to merge/validate them.
*   Its power comes from acting as a central hub. You can feed it output from other scanners and normalize to CycloneDX or SPDX.
*   We used it to generate an SBOM for our API gateway configs (a mix of YAML and binaries) by first using other analyzers, then piping into `cyclonedx-cli`.
*   The validation and diff features are solid for pipeline checks.

Our current thinking is to use **Syft for the initial SBOM generation** from container images and built artifacts, given its deep scanning capability. Then, we might use **cyclonedx-cli in the pipeline** for validation and merging multiple SBOMs before signing with Sigstore.

Has anyone else run both in production, especially for agent-style workloads? I'm curious about performance on slim images and if anyone has hit any snags with dependency detection for frameworks like LangChain or Dify, where the line between application code and library can get blurry.]]></content:encoded>
						                            <category domain="https://openclawsecurity.net/community/sbom-and-artifact-signing/">SBOM Generation and Artifact Signing</category>                        <dc:creator>Omar H.</dc:creator>
                        <guid isPermaLink="true">https://openclawsecurity.net/community/sbom-and-artifact-signing/comparing-syft-and-cyclonedx-cli-for-claw-sbom-generation-details-inside/</guid>
                    </item>
							        </channel>
        </rss>
		