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Per the CycloneDX 1.4 spec, the `metadata.timestamp` field contains
the date/time when the BOM was created [1].
Before the change, the value generated by the package-metadata.pl
script would look like this:
2024-06-03T15:51:10
CycloneDX 1.4 relies on the JSON Schema specification version draft-07,
which defines the `date-time` format [2] as derived from RFC 3339,
section 5.6 [3]. In this format, the `time-offset` component is required,
however in the original version of package-metadata.pl it is omitted.
This is causing problems with OWASP Dependency-Track version 4.11.0 or
newer, where it now validates submitted SBOMs against the JSON schema
by default [4]. SBOMs with incorrect timestamp values are rejected with
the following error:
{
"detail": "Schema validation failed",
"errors": [
"$.metadata.timestamp: 2024-06-03T15:51:10 is an invalid date-time"
],
"status": 400,
"title": "The uploaded BOM is invalid"
}
Add explicit `Z` (UTC) timezone offset in the `timestamp` field
to satisfy the CycloneDX schema.
[1]: https://github.com/CycloneDX/specification/blob/1.4/schema/bom-1.4.schema.json#L116-L121
[2]: https://json-schema.org/draft-07/draft-handrews-json-schema-validation-01#rfc.section.7.3.1
[3]: https://datatracker.ietf.org/doc/html/rfc3339#section-5.6
[4]: https://github.com/DependencyTrack/dependency-track/pull/3522
Signed-off-by: Roman Azarenko <roman.azarenko@iopsys.eu>
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