Hi Team,
Iam using nss-3.68.4-with-nspr-4.32 in my server. Client is trying to
connect to the server using STARTTLS, but after "Client Hello" message is
sent, the server sending "Unsupported Extension" to the client and the
connection getting closed.

Could anyone help me to figure out which extension did the server not
supported?

Below is the client hello message with extensions obtained from tcpdump:
Transport Layer Security
TLSv1.2 Record Layer: Handshake Protocol: Client Hello
Content Type: Handshake (22)
Version: TLS 1.0 (0x0301)
Length: 751
Handshake Protocol: Client Hello
Handshake Type: Client Hello (1)
Length: 747
Version: TLS 1.2 (0x0303)
Random: <Random>
Session ID Length: 32
Session ID: <Session id>
Cipher Suites Length: 62
Cipher Suites (31 suites)
Compression Methods Length: 1
Compression Methods (1 method)
Extensions Length: 612
Extension: ec_point_formats (len=4)
Extension: supported_groups (len=12)
Extension: encrypt_then_mac (len=0)
Extension: extended_master_secret (len=0)
Extension: signature_algorithms (len=48)
Extension: supported_versions (len=9)
Extension: psk_key_exchange_modes (len=2)
Extension: key_share (len=38)
Extension: certificate_authorities (len=463)

Any help to resolve this problem will be really helpful.


Best Regards,
Hanumesh

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