feat(va, ra, sa): Implement dns-account-01 validation logic and protocol updates #4
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Break validation of length and content of expected User-Agents out into two assertion functions. Make it so that DOH and MPICFullResults can be deprecated in either order. Fixes letsencrypt#8145
- Add `ChallengeTypeDNSAccount01` constant, `IsValid` update, and `RecordsSane` logic in `core/objects.go` - Add `DNSAccountChallenge01` function and handling in `core/challenges.go` - Add `DNSAccount01Enabled` feature flag in `features/features.go` - Add tests for the new challenge type in `core/core_test.go` and `core/objects_test.go` - Update vendor dependency `github.com/eggsampler/acme/v3` to support `dns-account-01` Implements core components for draft-ietf-acme-dns-account-label-00
- Modify PA to offer dns-account-01 when feature flag is enabled - Add tests for dns-account-01 challenge type in PA - Update challenge type config handling Enables dns-account-01 to be offered as a valid challenge type
- Add accountURI field to AuthzMeta in VA protocol - Update RA protocol to pass account URI - Update SA model to store account URI for challenges Required for passing account URI from WFE to VA for validation
Extracts the common DNS TXT record lookup, comparison, and result/error handling logic from `validateDNS01` into a new unexported helper function `validateDNS`. This change aims to reduce code duplication in preparation for simplifying the upcoming `validateDNSAccount01` function, which shares most of this core validation flow. `validateDNS01` is updated to calculate its specific inputs (digest, query domain) and then call the new helper function. There are no intended functional changes to `validateDNS01` itself.
Adds validation logic for the ACME `dns-account-01` challenge type. Introduces the `validateDNSAccount01` function in `va/dns.go` which implements the account-specific DNS label construction (based on the Account URI) and validation flow, utilizing the shared `validateDNS` function. Unauthorized errors returned during validation are enriched with the Account URI for context. Adds a new test file `va/dns_account_test.go` with unit tests for the `validateDNSAccount01` function, mirroring existing dns-01 test scenarios and checking specific dns-account-01 behavior. Updates `bdns/mocks.go` with necessary entries to support the new dns-account-01 test cases. Ref: draft-ietf-acme-dns-account-label-00
Passes the account URI to the VA's validateChallenge function and adds a case to route dns-account-01 challenges (when enabled) to a new validateDNSAccount01 function. Updates the caller in DoDCV and adjusts tests.
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Pull Request Overview
This PR implements the dns-account-01 challenge type by adding the necessary protocol, model, and validation logic to support account-specific DNS validations. Key changes include:
- Propagating and validating an additional accountURI parameter in VA and RA components via updated gRPC protos and Go code.
- Implementing and testing the validateDNSAccount01 logic in the Validation Authority, including constructing an account-specific DNS query domain.
- Updating configuration, models, and DNS mocks to support the new challenge type.
Reviewed Changes
Copilot reviewed 23 out of 24 changed files in this pull request and generated no comments.
Show a summary per file
| File | Description |
|---|---|
| va/va.go | Modified validateChallenge routing and added accountURI parameter for dns-account-01. |
| va/proto/va.proto & va.pb.go | Updated proto definitions and generated files to include the accountURI field. |
| va/dns.go | Added validateDNSAccount01 with account-specific DNS prefix calculation and error enrichment. |
| va/dns_test.go & dns_account_test.go | Renamed and added tests covering various failure and success cases for dns-account-01. |
| policy/pa.go & pa_test.go | Updated challenge offering to include dns-account-01 when the feature flag is enabled. |
| features/features.go | Added DNSAccount01Enabled flag to control exposure of the new challenge type. |
| core/objects.go, challenges.go, core_test.go | Extended challenge type definitions and test coverage for dns-account-01. |
| cmd/config.go | Updated configuration validation to allow dns-account-01 in supported challenge types. |
| bdns/mocks.go | Modified DNS TXT record mocks to handle account-specific query domains for dns-account-01. |
Files not reviewed (1)
- go.mod: Language not supported
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