[openwrt/openwrt] build: add explicit timezone in CycloneDX SBOM

[LEDE Commits]

robimarko pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/2ded629864de779df8ddd0224a875edf17f9fea5

commit 2ded629864de779df8ddd0224a875edf17f9fea5
Author: Roman Azarenko <roman.azarenko at iopsys.eu>
AuthorDate: Tue Jun 4 18:00:03 2024 +0200

    build: add explicit timezone in CycloneDX SBOM
    
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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 at iopsys.eu>
---
 scripts/package-metadata.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/package-metadata.pl b/scripts/package-metadata.pl
index 1e47052ba0..82bd4360f3 100755
--- a/scripts/package-metadata.pl
+++ b/scripts/package-metadata.pl
@@ -655,7 +655,7 @@ sub dump_cyclonedxsbom_json {
 		serialNumber => "urn:uuid:$uuid",
 		version => 1,
 		metadata => {
-			timestamp => gmtime->datetime,
+			timestamp => gmtime->datetime . 'Z',
 		},
 		"components" => [@components],
 	};