64ef051d18
Extract shared DNS checks into dnsclient and fail closed on truncated or non-success CAA responses. Climb past eTLD+1, validate RFC 8659 issue-value syntax, and map NXDOMAIN TXT lookups to the pending-verification path. Signed-off-by: Cursor Agent <cursoragent@cursor.com> Co-authored-by: Bryan FRIMIN <bryan@frimin.fr>
37 lines
1.6 KiB
Go
37 lines
1.6 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@probo.com>.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package dnsclient
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import "errors"
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var (
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// ErrCAADenied means a CAA policy at the hostname or a parent domain
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// forbids issuance by the requested certificate authority.
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ErrCAADenied = errors.New("caa records do not permit issuance")
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// ErrTXTNotFound means no TXT record exists at the queried domain name.
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ErrTXTNotFound = errors.New("domain TXT record not found")
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// ErrTXTMismatch means TXT records exist at the domain but none match the
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// expected verification value.
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ErrTXTMismatch = errors.New("domain TXT record mismatch")
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)
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