NoSuchAlgorithmException : TLSv1.2 unknown protocol

Question

I have tried a number of things and searched a quite few posts but cannot found a proper answer to the below problem.

While making a ssl context i.e

ctx = SSLContext.getInstance("TLSv1.2");

i am getting an exception as

java.security.NoSuchAlgorithmException: Unknown protocol: TLSv1.2

I tried to use another protocol that is

ctx = SSLContext.getInstance("TLSv1");

but then i get an error as

javax.net.ssl.SSLHandshakeException: algorithm not supported for certificate

please help me as to where i am getting thing wrong.

Which JRE version do you use? Only JDK 7+ supports TLS 1.2 initially. JDK 6 supports it from Update 121. And I don't think that JDK 5 supports it at all. I'm talking about Oracle JDKs, not sure about other implementations — siarheib
– siarheib, Commented Nov 14, 2016 at 8:59
yeah you are right .. i am using java 1.4 .. is there any way i can still use TLS in java 4? — Shivam Jari
– Shivam Jari, Commented Nov 14, 2016 at 9:02

user207421 · Accepted Answer · 2016-11-14 09:00:38Z

1

You must be using some ancient version of Java that doesn't support TLS 1.2.

Upgrade.

answered Nov 14, 2016 at 9:00

user207421

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2 Comments

Shivam Jari Over a year ago

yes i am using java 1.4 but when i do ctx = SSLContext.getInstance("TLSv1"); it creates a context ..though SSLHandshake exception is there which says algorithm not supported for certificate

smsnheck Over a year ago

Then you either have to switch to a newer Java version or you have to create/get new certificates which support TLSv1

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