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TLS cipher suite lookup

Look up a TLS cipher suite by its 2-byte code or IANA name, on your device, for key exchange, cipher, MAC, and whether it is still recommended.

Options

live

TLS cipher suite lookup accepts a 2-byte code, such as 0x1301, or its IANA name, then searches a 60-suite table from real ClientHello traffic. A match names cipher, MAC, authentication and key exchange, plus supported TLS versions and whether IANA still recommends it. The table falls short of IANA's roughly 370 registered codes, so an unlisted one returns its hex value.

Questions

What lookup formats does it accept?

A 2-byte hex code such as 0x1301 or 13,01, or the full IANA name such as TLS_AES_128_GCM_SHA256.

How complete is the table?

60 common suites that appear in real ClientHello and openssl ciphers output, not the roughly 370 code points IANA has ever registered.

What does a match show?

Key exchange, authentication, cipher, MAC, supported TLS versions, and whether the IANA registry still marks it recommended.

What happens with a code not in the table?

It still returns the parsed hex code, marked as not in the bundled table.

Does it fetch anything live from IANA?

No, the table is bundled in the tool itself; there is no network lookup.

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