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VERCEL: skip HTTPS ECH intergration tests

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SukkaW 2025-12-04 21:42:34 +08:00
parent 3a24185faf
commit 24d531ab00
2 changed files with 22 additions and 0 deletions
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10
documentation/provider/vercel.md
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@ -144,3 +144,13 @@ Vercel does not allow the record type to be changed after creation. If you try t
### Minimum TTL
Vercel enforces a minimum TTL of 60 seconds (1 minute) for all records. We will always silently override the TTL to 60 seconds if you try to set a lower TTL.
### HTTPS Record ECH Base64 Validation
Currently, Vercel does implements IETF's "Bootstrapping TLS Encrypted ClientHello with DNS Service Bindings" draft. However, Vercel also implements a validation process for the `ech` parameter in the `HTTPS` records, and will reject the request with the following error message if Vercel considers the `ech` value is invalid:
```
Invalid base64 string: [input] (key: ech)
```
The detail of Vercel's validation process is unknown, thus we can not support static validation for `dnscontrol check` or `dnscontrol preview`. You should use `ech=` with caution.

12
integrationTest/integration_test.go
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@ -292,6 +292,18 @@ func makeTests() []*TestGroup {
testgroup("Ech",
requires(providers.CanUseHTTPS),
not(
// Last tested in 2025-12-04. Turns out that Vercel implements an unknown validation
// on the `ech` parameter, and our dummy base64 string are being rejected with:
//
// Invalid base64 string: [our base64] (key: ech)
//
// Since Vercel's validation process is unknown and not documented, we can't implement
// a rejectif within auditrecord to reject them statically.
//
// Let's just ignore ECH test for Vercel for now.
"VERCEL",
),
tc("Create a HTTPS record", https("@", 1, "example.com.", "alpn=h2,h3")),
tc("Add an ECH key", https("@", 1, "example.com.", "alpn=h2,h3 ech=some+base64+encoded+value///")),
tc("Ignore the ECH key while changing other values", https("@", 1, "example.net.", "port=80 ech=IGNORE")),