Expose cipher suite TLSv1_2_2025_07 #684
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… cipher_suites
bretambrose
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Sep 30, 2025
sfod
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Oct 20, 2025
awscrt/io.py
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| """A TLS Cipher Preference ordering that supports TLS 1.2 through TLS 1.3, and does not include CBC cipher suites. | ||
| It is FIPS-complaint.""" |
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Debatable: While the does not include CBC cipher suites part is true, and that's what we originally requested from s2n, there are more differences. See aws/s2n-tls#5375
When I added the policy to c-io, I used abstract tightened security, but now thinking more about it, maybe we should give details on what this preference provides, something like the following:
A TLS cipher preference requiring TLS 1.2+ with FIPS compliance and perfect forward secrecy. Supports AES-GCM and ECDHE cipher suites with ECDSA and RSA-PSS signature schemes. Uses NIST P-256 and P-384 curves only.
sfod
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Oct 20, 2025
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