I use Indy TidHTTPServer and TidServerIOHandlerSSLOpenSSL on my server component to handle HTTPS request for command & control.
There are situations where - without any logged errors on the server - client receive an error "SSL handshake failed". I see no reasons on the server and - funny enough - fixes itself sometimes after some time.
Where can I step into the Indy components to see where the problem is? Which events can I use to maybe see something?
Update1 (29.05.2021): An exeption I found throught he handlers suggested by Remy Lebeau is "Error accepting connection with SSL. EOF was observed that violates the protocol". I still cant tell what is causing this, though...
I have had this (or similar) errors in the past when I forgot to put the OpenSSL dll files in the same folder as the executable. You need ssleay32.dll and libeay32.dll.
You can find them on the Indy page (link at the very bottom): https://www.indyproject.org/download/ssl/
Related
I am encountering some problems using some code that worked for ages involving Indy and the download of a web page. I use RAD Studio 10.2 Tokyo.
The web page is as follows:
https://donet.rfi.it/RFIPlatform/showDoc.do?compartimentoHidden=AN&docTypeHidden=CC
The code I am using is part of an application which has the same code since 2011 and it always worked well. The code is as follows:
IDHTTP1.Get('https://donet.rfi.it/RFIPlatform/showDoc.do?compartimentoHidden=AN&docTypeHidden=CC');
I am getting a "Connection Reset by Peer 10054" error since the website went down, some days ago, and when it came up again, the code did not work anymore.
The aforementioned web page can be called from the browser, can even be downloaded with WGET, but Indy is failing.
I tried to play with various options (Cookie Handling, Handle Redirects, HTTPOptions, etc...) and I also updated the SSL libraries to 1.0.2q (Indy cannot use OpenSSL 1.1.0 yet), but the whole thing just doesn't want to work.
Can someone help me figure out what is going on? It has to be for sure something on the website, since the code I use is the same since 2011 and it has always worked. And before that, the same code worked in a similar application since 2008.
Indy's TIdSSLIOHandlerSocketOpenSSL component enables only TLS 1.0 by default. The website in question (https://donet.rfi.it) does not accept TLS 1.0 anymore (probably why it went offline, to update its software), it will accept only TLS 1.1+ now.
TIdHTTP is able to successfully establish a TCP/IP connection to donet.rfi.it:443, but as soon as TIdSSLIOHandlerSocketOpenSSL sends a TLS 1.0 handshake request, the server forcibly closes the TCP connection. You are getting the "connection reset by peer" error while TIdSSLIOHandlerSocketOpenSSL is trying to read the server's handshake response.
You need to configure TIdSSLIOHandlerSocketOpenSSL to enable TLS 1.1 and/or 1.2. You can do that via its SSLOptions.SSLVersions property. Then TIdHTTP.Get() will work again (I tested it).
Indy Delphi 10.1 Berlin.
My customer had the HTTPS connection checked (using Qualys SSL Labs). The report states: "This server supports SSL 2" plus other warnings but I guess they are related to this.
The code used is as follows:
SSLIOhandler:=TIdServerIOHandlerSSLOpenSSL.Create(NIL);
SSLIOhandler.SSLOptions.Method:=sslvTLSv1_2;
SSLIOhandler.SSLOptions.Mode:=sslmServer;
SSLIOhandler.OnVerifyPeer:=OnVerifyPeer;
SSLIOhandler.SSLOptions.SSLVersions:=[sslvTLSv1,sslvTLSv1_1,sslvTLSv1_2];
HTTPServer:=TIdHTTPServer.Create(NIL);
HTTPServer.IOhandler:=SSLIOhandler;
I have read various posts but this area remains pretty much abacadabra to me. I limited the SSLVersions to just [sslvTLSv1_2] but the warning remains. What else can I do?
Update: Sorry to waste time. The Qualys test site apparently did not reload. I've restarted and retested and indeed it no longer complains about SSL2.
Next step is to pass its complaints about the ciphers, starting with TLS_RSA_WITH_DES_CBC_SHA. I have a list of ciphers but can't find how to assign them. When I use e.g.
SSLOptions.CipherList:='TLS_RSA_WITH_3DES_EDE_CBC_SHA';
I get an error: "SetCipher failed".
Can anyone diagnose my failure to connect to smtp.office365.com using Delphi 2010 and Indy 10.5.5?
I have read the code examples provided by Indy expert Remy Lebeau in this question: Using INDY 10 SMTP with Office365.
I have taken each of the two alternate code samples (one using AuthType satDefault and the other satSASL) from that question and cut-and-pasted them into a console application. In each case get the following error when run:
EIdOSSLUnderlyingCryptoError: Error connecting with SSL.
Error connecting with SSL.
error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number
When I change UseTLS to utUseExplicitTLS (as suggested in some other answers that state a plain text connection is required before attempting TLS) I get the following error:
EIdOSSLConnectError: Error connecting with SSL.
Error connecting with SSL.
EOF was observed that violates the protocol
I notice some references in other answers to setting SSLOptions.SSLVersions instead of SSLOptions.Method (which is said to be deprecated) but that property does not appear to exist on TIdSSLIOHandlerSocketOpenSSL in my version of Indy.
I believe I have the version of Indy which shipped with the D2010 updates but that it's somewhat out-of-date. I would be willing to update a newer version if one exists but can't seem to find anyway to do so without installing SVN, learning it, checking out from Development, and recompiling.
Finally, I've tried running all four variants of my console application with no DLLs present in the executable directory and with the DLLs from OpenSSL v1.0.2h present without any apparent effect.
EDIT: One other piece of information. The SMTP credentials supplied by the client (this project sends emails through a single dedicated outbound email address) is of the form project#myclientsdomain.com, rather than #office365.
Apparently, since Remy wrote the answer in the linked question, Office365 has stopped supporting SSLv3 (presumably to avoid a known exploit) and now requires TLS. The code from his answer in the original question works if you change these two lines:
idSMTP1.UseTLS := utUseImplicitTLS;
TIdSSLIOHandlerSocketOpenSSL(idSMTP1.IOHandler).SSLOptions.Method := sslvSSLv3;
to:
idSMTP1.UseTLS := utUseExplicitTLS;
TIdSSLIOHandlerSocketOpenSSL(idSMTP1.IOHandler).SSLOptions.Method := sslvTLSv1;
I am trying to consume a REST service on Amazon with Delphi XE6. At design time I add TRestClient, TRestRequest, TRestResponse components and set BaseURL property. When I execute the request, I get the following error:
While trying to execute the request the following error occured: REST request failed: Error connecting with SSL.
error:14094410:SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure
Tried searching google, there were some suggestions to update Indy libraries, but something went horribly wrong and I had to spent some hours uninstalling everything Delphi related and reinstall.
So, it would be much appreciated if someone could guide me to right direction about how to resolve this error.
Maybe I can bypass TRest* components and use Indy components directly but I am not very experienced about which Indy components I would need.
Thanks in advance.
I'm new to dealing with cookies and not sure if my code or maybe Indy version is the problem based on researching other posts.
Using Delphi 2010 and Indy 10.5.5.
Have set up a cookiemanager at design time. I can send an initial login request (using the POST method) to the server that is successful (get a "success" code back from the server app) and the cookie manager shows that it has accepted a cookie from the server.
When I try to reply to the server (again using POST) to get the next set of information, I get an error code back from the server app which indicates an authorization failure and I'm being told by the server tech support people to check the cookie being sent with the reply.
How can I check the contents of the cookie header that is being sent back to the server?
Also, in another post I saw that Indy 10 IdCookieManager.pas and IdCookie.pas have been updated in 2011. Should I update my Indy to the latest version as this might be my problem?
Thanks in advance.
Here is some more info:
Thank you for your previous assistance; I appear to be getting closer to reinstalling Indy10.
I purged my system of all Indy stuff except the most recent version (10.5.8) which I downloaded yesterday. [Actually I just moved the old stuff into a directory with an unusual name.]
Now I get a clean compile on all 5 packages.
I was able to add the two main packages (the ones starting with dcl) to my program's project list.
But I get "[DCC Fatal Error] E2202 Required Package IndyCore not found." when I try to compile my main program.
I tried removing and reinstalling the dcl packages to my project. When I removed them, I got the message that IndyCore and 3 other packages would also be removed - so it seems to know that dclIndyCode140 uses IndyCore140.
I've added some directories to my search path and tried placing the 5 bpl's in different directories. None of that had any effect and at this point I am stumped.
Ideas? Suggestions?
Steve
Upgrading to the latest release is definate recommended. Links are on Indy`s website. Yes, cookie support was broken in earlier Indy 10 releases but it working again now.
As for your other question, to see what TIdHTTP is sending, you have a few choices:
Look at the TIdHTTP.Request.RawHeaders property after sending a request.
Attach one of Indy's TIdLog... components to TIdHTTP, such as TIdLogFile, and look at the output.
Use an external packet sniffer, such as Wireshark.