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DRAFT: apk: Add warning upon RSA SHA1 signatures being used #2400

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DRAFT: apk: Add warning upon RSA SHA1 signatures being used #2400

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1 change: 1 addition & 0 deletions pkg/apk/apk/index.go
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Original file line number Diff line number Diff line change
Expand Up @@ -412,6 +412,7 @@ func parseRepositoryIndex(ctx context.Context, u string, keys map[string][]byte,
continue
case "RSA":
// Current legacy compat
clog.FromContext(ctx).Errorf("%s is using RSA SHA1 signature. RSA SHA1 signature verification support will be removed on 2026-09-30. https://github.com/chainguard-dev/apko/issues/2399", u)
digestAlgorithm = crypto.SHA1
case "RSA256":
// Current best practice
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