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Add signature_algorithms_cert extension to _serverTLS13Handshake #513

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Add signature_algorithms_cert extension to _serverTLS13Handshake #513

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d88c16b
Add signature_algorithms_cert extension to the "_serverTLS13Handshake…
Odinmylord Apr 9, 2024
207aa80
Fix names and update _sigHashesToList
Odinmylord Apr 11, 2024
bd28f87
Fix issues with linter
Odinmylord Apr 12, 2024
c2272ee
fix long lines
Odinmylord Apr 12, 2024
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8 changes: 8 additions & 0 deletions tlslite/handshakesettings.py
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Original file line number Diff line number Diff line change
Expand Up @@ -396,6 +396,10 @@ def _init_misc_extensions(self):
# resumed connections (as tickets are single-use in TLS 1.3
self.ticket_count = 2
self.record_size_limit = 2**14 + 1 # TLS 1.3 includes content type
# data needed for the signature algorithms cert extension
self.more_sig_schemes_cert = []
self.ecdsaSigHashesCert = []
self.rsaSigHashesCert = []

def __init__(self):
"""Initialise default values for settings."""
Expand Down Expand Up @@ -675,6 +679,10 @@ def _copy_extension_settings(self, other):
other.max_early_data = self.max_early_data
other.ticket_count = self.ticket_count
other.record_size_limit = self.record_size_limit
# signature algorithms cert
other.more_sig_schemes_cert = self.more_sig_schemes_cert
other.ecdsaSigHashesCert = self.ecdsaSigHashesCert
other.rsaSigHashesCert = self.rsaSigHashesCert

@staticmethod
def _remove_all_matches(values, needle):
Expand Down
8 changes: 7 additions & 1 deletion tlslite/tlsconnection.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2830,9 +2830,15 @@ def _serverTLS13Handshake(self, settings, clientHello, cipherSuite,
cr_settings.dsaSigHashes = []
valid_sig_algs = self._sigHashesToList(cr_settings)
assert valid_sig_algs

cr_settings.more_sig_schemes = cr_settings.more_sig_schemes_cert
cr_settings.ecdsaSigHashes = cr_settings.ecdsaSigHashesCert
cr_settings.rsaSigHashes = cr_settings.rsaSigHashesCert
valid_sig_algs_cert = self._sigHashesToList(cr_settings)
certificate_request = CertificateRequest(self.version)
certificate_request.create(context=ctx, sig_algs=valid_sig_algs)
if valid_sig_algs_cert:
sig_algs_cert_ext = SignatureAlgorithmsCertExtension().create(valid_sig_algs_cert)
certificate_request.addExtension(sig_algs_cert_ext)
self._queue_message(certificate_request)

certificate = Certificate(CertificateType.x509, self.version)
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