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hs2019 signatures hashed with SHA-512, and SHA-512 digests

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A draft-cavage hs2019 signature leaves the hash to the key: with an RSA key it is tried with SHA-256, as nearly everyone
signs, then with SHA-512, as some do; rsa-sha256 stays SHA-256 only. A Digest of SHA-512= is checked as SHA-256= is.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw
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thepraandClaude Opus 5.5 committed 2026-10-06 11:13:59 +02:00
1 parent 0310bbe0f9
commit e708f1ad2e
5 files changed
+39 -7
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PrivaPub/Federation/Signing/RequestSignature.cs
+1 -1
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@@ -40,6 +40,6 @@ namespace PrivaPub.Federation.Signing
_message != default ? MessageSignatures.Base(request, _message, baseAddress) : HttpSignatures.SigningString(request, _cavage);
public bool VerifiedBy(string publicKeyPem, string signed) =>
_message != default ? MessageSignatures.Verify(publicKeyPem, _message, signed) : HttpSignatures.Verify(publicKeyPem, signed, _cavage.Signature);
_message != default ? MessageSignatures.Verify(publicKeyPem, _message, signed) : HttpSignatures.Verify(publicKeyPem, signed, _cavage.Signature, _cavage.Algorithm);
}
}