Error connecting with SSL using Indy and Delphi 10

1
votes

I'm trying to submit JSON via post on a given URL, but i keep getting the error:

'Error connecting with SSL. error:1409442E:SSL routines:SSL3_READ_BYTES:tlsv1 alert protocol version'.

I'm using the property SSLVersions to specify the version (sslvTLSv1_2) and i checked manually using Firefox certificate viewer to confirm the version was correct. I also updated OpenSSL with the latest version using their installer as recommended on Delphi's help.

Besides the version, i barely touched any other property from both TIdSSLIOHandlerSocketOpenSSL and TIdHTTP.

I'm trying on Delphi 10.2 Tokyo using Indy built-in basic authentication as a custom header

Are there any other properties i should change or look into in order to succesfully post?

Thank you!

1
delphisslindy
"I also updated OpenSSL with the latest version using their installer as recommended on Delphi's help" From where, exactly? – Dave Nottage
slproweb.com/products/Win32OpenSSL.html – Joe158
Make sure you install 1.0.2o. I'm pretty sure Indy does not support 1.1.x yet – Dave Nottage
Thank you very much, i downgraded and everything worked properly! Wasn't aware that Indy didn't support 1.1.0 – Joe158
@DaveNottage "I'm pretty sure Indy does not support 1.1.x yet" - that is correct. FYI, OpenSSL DLLs that are known to be compatible with Indy are available on Indy's Fulgan mirror: indy.fulgan.com/SSL – Remy Lebeau

1 Answers

3
votes

As Dave pointed out in comments, I was using the newest version of OpenSSL 1.1.x, which isn't supported by Indy. I downgraded to 1.0.2o, and everything worked out!