Fix Android hash subject calculation

pimterry · pimterry · commit 9c2e8710608b · 2025-06-24T17:47:54.000+02:00
This broke Android setup with new certificates, because changes to the
certificate generation code resulted in a subject starting with 0, which
was lost in the filename, and so never matched. This bug has always been
present, but wasn't visible until that took effect.

This now left-pads with 0s to resolve this issue.
diff --git a/src/certificates.ts b/src/certificates.ts
@@ -24,7 +24,8 @@ export function getCertificateSubjectHash(cert: forge.pki.Certificate) {
         .update(derBytes)
         .digest()
         .readUInt32LE(0)
-        .toString(16);
+        .toString(16)
+        .padStart(8, '0');
 }
 
 // Get a full SHA1 hash of the certificate

Original file line number	Diff line number	Diff line change
`@@ -24,7 +24,8 @@ export function getCertificateSubjectHash(cert: forge.pki.Certificate) {`
`24`	`24`	`.update(derBytes)`
`25`	`25`	`.digest()`
`26`	`26`	`.readUInt32LE(0)`
`27`		`- .toString(16);`
	`27`	`+ .toString(16)`
	`28`	`+ .padStart(8, '0');`
`28`	`29`	`}`
`29`	`30`
`30`	`31`	`// Get a full SHA1 hash of the certificate`