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| 1 | ++++ |
| 2 | +author = "Jason Smith" |
| 3 | +title = "π¨ Call for Feedback: A Standardized Approach to SBOM Signing" |
| 4 | +date = "2026-02-09" |
| 5 | +linkedin = "" |
| 6 | +image = "img/thirdparty/2026-02-09-sbom-signing-best-practices.png" |
| 7 | ++++ |
| 8 | + |
| 9 | +> The new benchmark by which all SBOM signing and verification tools will be judged. |
| 10 | +
|
| 11 | +This Friday February 13th @ 11:00 EST I'll be presenting the initial draft of the SBOM Signing & Verification Best |
| 12 | +Practices Guide at the [OpenSSF](https://openssf.org/) SBOM Everywhere SIG meeting. This initial draft focuses on the |
| 13 | +methods used to compute the hash of an SBOM for signing and verification. |
| 14 | + |
| 15 | +The goal? To move the industry away from fragile "binary blob" signatures and toward data-aware integrity so we have a |
| 16 | +standardized system that truly scales across different platforms and vendor implementations. It is also a necessity to |
| 17 | +properly support the CycloneDX specification to have full interoperability. |
| 18 | + |
| 19 | +I've been heads-down on the reference implementations, and I'm excited to share that the JSON foundation is now largely |
| 20 | +complete. We have working code in Go, Java, JavaScript, Python, and Rust that proves we can maintain SBOM trust |
| 21 | +regardless of formatting. |
| 22 | + |
| 23 | +## β
The "Pretty-Print" vs "Minify" Tests Pass |
| 24 | + |
| 25 | +In our test suite, we took original SBOMs (both CycloneDX and SPDX), ran them through various "pretty-print" and |
| 26 | +"minify" cycles, and proved that the computed hash remains identical every time. No more broken signatures because of |
| 27 | +a 2-space indent change or an added/removed newline. |
| 28 | + |
| 29 | +### π§ What's in the WIP? |
| 30 | + |
| 31 | +**JCS Integration:** Full support for RFC 8785 *"permits data to be exchanged in its original form on the 'wire' while |
| 32 | +cryptographic operations performed on the canonicalized counterpart of the data in the producer and consumer endpoints |
| 33 | +generate consistent results"*. |
| 34 | + |
| 35 | +**Format Agnostic:** Support for CycloneDX and SPDX JSON structures, including embedded signatures and property exclusion |
| 36 | +in JSF for CycloneDX. |
| 37 | + |
| 38 | +**Language Diversity:** Reference implementations across 5 major ecosystems (Go, Java, JavaScript, Python, Rust). |
| 39 | + |
| 40 | +**The XML Frontier:** I'll be sharing my early findings on why W3C Exclusive C14N canonicalization isn't enough for |
| 41 | +XML-based SBOMs and some thoughts on how to approach XML normalization. However, the core focus for Friday will be on |
| 42 | +the JSON method. |
| 43 | + |
| 44 | +## π«΅ Join the Discussion |
| 45 | + |
| 46 | +I want your eyes on this. Whether you are a tool-builder, a security engineer, or a compliance officer, your feedback |
| 47 | +is critical to ensuring this standard is adopted and works in the real world. |
| 48 | + |
| 49 | +I want to hear from the supporters and the critics alike. If you love the approach, help us refine it. If you hate it, |
| 50 | +come tell me why. The only way we build a truly resilient standard is by stress-testing it against every perspective |
| 51 | +before it's finalized. |
| 52 | + |
| 53 | +### π
OpenSSF Calendar |
| 54 | + |
| 55 | +[https://calendar.google.com/calendar/u/0/embed?src=s63voefhp5i9pfltb5q67ngpes@group.calendar.google.com](https://calendar.google.com/calendar/u/0/embed?src=s63voefhp5i9pfltb5q67ngpes@group.calendar.google.com) |
| 56 | + |
| 57 | +### π Meeting Time |
| 58 | + |
| 59 | +Friday February 13th @ 11:00 EST |
| 60 | + |
| 61 | +### π Zoom Link |
| 62 | + |
| 63 | +[https://calendar.google.com/calendar/u/0/embed?src=s63voefhp5i9pfltb5q67ngpes@group.calendar.google.com](https://calendar.google.com/calendar/u/0/embed?src=s63voefhp5i9pfltb5q67ngpes@group.calendar.google.com) |
| 64 | + |
| 65 | +### π GitHub WIP |
| 66 | + |
| 67 | +[https://github.com/shiftleftcyber/sbom-signing-best-practices/tree/initial-setup](https://github.com/shiftleftcyber/sbom-signing-best-practices/tree/initial-setup) |
| 68 | + |
| 69 | +If you are unable to make it and want to discuss directly just let me know. Take a look through the GitHub repo, |
| 70 | +gather your thoughts and feedback, and then connect with me to book a time to discuss further. |
| 71 | + |
| 72 | +Let's stop signing the formatting and start signing the facts. Hope to see you Friday! |
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