* Adds automated ACME tests using Caddy.
* Do not use CheckSignatureFrom method to validate TLS-ALPN-01 challenges
* Uncomment TLS-ALPN test.
* Fix validation of tls-alpn-01 keyAuthz
Surprisingly, this failure was not caught by our earlier, but unmerged
acme.sh tests:
> 2023-06-07T19:35:27.6963070Z [32mPASS[0m builtin/logical/pkiext/pkiext_binary.Test_ACME/group/acme.sh_tls-alpn (33.06s)
from https://github.com/hashicorp/vault/pull/20987.
Notably, we had two failures:
1. The extension's raw value is not used, but is instead an OCTET
STRING encoded version:
> The extension has the following ASN.1 [X.680] format :
>
> Authorization ::= OCTET STRING (SIZE (32))
>
> The extnValue of the id-pe-acmeIdentifier extension is the ASN.1
> DER encoding [X.690] of the Authorization structure, which
> contains the SHA-256 digest of the key authorization for the
> challenge.
2. Unlike DNS, the SHA-256 is directly embedded in the authorization,
as evidenced by the `SIZE (32)` annotation in the quote above: we
were instead expecting this to be url base-64 encoded, which would
have a different size.
This failure was caught by Matt, testing with Caddy. :-)
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Quick gofmt run.
* Fix challenge encoding in TLS-ALPN-01 challenge tests
* Rename a PKI test helper that retrieves the Vault cluster listener's cert to distinguish it from the method that retrieves the PKI mount's CA cert. Combine a couple of Docker file copy commands into one.
---------
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
Co-authored-by: Steve Clark <steven.clark@hashicorp.com>
Co-authored-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Add ACME TLS-ALPN-01 Challenge validator to PKI
This adds support for verifying the last missing challenge type,
TLS-ALPN-01 challenges, using Go's TLS library. We wish to add this as
many servers (such as Caddy) support transparently renewing certificates
via this protocol, without influencing the contents of sites served.
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Enable suggesting, validating tls-alpn-01 in PKI
Notably, while RFC 8737 is somewhat vague about what identifier types
can be validated with this protocol, it does restrict SANs to be only
DNSSans; from this, we can infer that it is not applicable for IP
typed identifiers. Additionally, since this must resolve to a specific
domain name, we cannot provision it for wildcard identifiers either.
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Fix test expectations to allow ALPN challenges
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Add tls-alpn-01 as a supported challenge to docs
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Add test for tls-alpn-01 challenge verifier
This hacks the challenge engine to allow non-standard (non-443) ports,
letting us use a local server listener with custom implementation.
In addition to the standard test cases, we run:
- A test with a longer chain (bad),
- A test without a DNSSan (bad),
- A test with a bad DNSSan (bad),
- A test with some other SANs (bad),
- A test without a CN (good),
- A test without any leaf (bad), and
- A test without the extension (bad).
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Add changelog entry
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Update builtin/logical/pki/acme_challenges.go
Co-authored-by: Alexander Scheel <alex.scheel@hashicorp.com>
---------
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
Co-authored-by: Kit Haines <khaines@mit.edu>
* Handle caching of ACME config
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Add DNS resolvers to ACME configuration
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Add custom DNS resolver to challenge verification
This required plumbing through the config, reloading it when necessary,
and creating a custom net.Resolver instance.
Not immediately clear is how we'd go about building a custom DNS
validation mechanism that supported multiple resolvers. Likely we'd need
to rely on meikg/dns and handle the resolution separately for each
container and use a custom Dialer that assumes the address is already
pre-resolved.
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Improvements to Docker harness
- Expose additional service information, allowing callers to figure out
both the local address and the network-specific address of the
service container, and
- Allow modifying permissions on uploaded container files.
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Add infrastructure to run Bind9 in a container for tests
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Validate DNS-01 challenge works
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
---------
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Add HTTP challenge validator
This will attempt to safely validate HTTP challenges, following a
limited number of redirects and timing out after too much time has
passed.
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Add test for ValidateKeyAuthorization
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Add test cases for ValidateHTTP01Challenge
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
* Add token to HTTP challenge
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
---------
Signed-off-by: Alexander Scheel <alex.scheel@hashicorp.com>
