TLS 1.2 + Java 1.6 + BouncyCastle

If you look at RFC 4492 5.2, you’ll see that the server CAN send the “ec_point_formats” extension, but is only supposed to do so “when negotiating an ECC cipher suite”. If you want TLSClient to just ignore the extra extension instead of raising an exception, I suggest overriding TlsClient.allowUnexpectedServerExtension(…) to allow ec_point_formats in the same … Read more

Classic ASP Outbound TLS 1.2

I found a solution with a simple registry fix. 1) Register TLS 1.2 Protocol: Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2] [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client] “Enabled”=dword:ffffffff “DisabledByDefault”=dword:00000000 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server] “Enabled”=dword:ffffffff “DisabledByDefault”=dword:00000000 2) Configure TLS 1.2 to be default in 32 bit applications: Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\WinHttp] “DefaultSecureProtocols”=dword:00000800 3) Configure TLS 1.2 to be default … Read more

How to implement Security Protocols TLS 1.2 in .Net 3.5 framework

I’m using VS 2008 with .net 3.5.30729.4926. All I had to do was: Add imports: Imports System.Security.Authentication Imports System.Net Add this to my code (C#): public const SslProtocols _Tls12 = (SslProtocols)0x00000C00; public const SecurityProtocolType Tls12 = (SecurityProtocolType)_Tls12; ServicePointManager.SecurityProtocol = Tls12; VB.net version: Const _Tls12 As SslProtocols = DirectCast(&HC00, SslProtocols) Const Tls12 As SecurityProtocolType = DirectCast(_Tls12, … Read more

When was TLS 1.2 support added to OpenSSL?

On the official changelog page you provided, under Changes between 1.0.0h and 1.0.1 [14 Mar 2012] you can see Initial TLS v1.2 support. *) Add TLS v1.2 server support for client authentication. [Steve Henson] *) Add TLS v1.2 client side support for client authentication. Keep cache of handshake records longer as we don’t know the … Read more

curl: Unknown error (0x80092012) – The revocation function was unable to check revocation for the certificate

I’ve been using curl through a mitm proxy for pen-testing and getting the same issue. I finally figured that curl needs a parameter telling it not to check certificate revocation, so the command looks something like this: curl “https://www.example.com” –ssl-no-revoke -x 127.0.0.1:8081 The -x parameter passes the proxy details – you may not need this. … Read more

Enable TLSv1.2 and TLS_RSA_WITH_AES_256_CBC_SHA256 Cipher Suite

It is only possible if you use a simple HTTPS connection (not SSL Sockets) using the properties -Dhttps.protocols=TLSv1.2 -Dhttps.cipherSuites=TLS_RSA_WITH_AES_256_CBC_SHA256 See the post at http://fsanglier.blogspot.com.es/ Java 7 introduced support for TLS v1.2 (refer to http://docs.oracle.com/javase/7/docs/technotes/guides/security/enhancements-7.html) BUT does not enable it by default. In other words, your client app must explicitly specify “TLS v1.2” at SSLContext creation, … Read more

TLS 1.2 not negotiated in .NET 4.7 without explicit ServicePointManager.SecurityProtocol call

I had the same issue (Windows 10 and SSL3 / TLS only… not System Default) with a legacy app targeting 4.7.2. My issue was that during the upgrade process over the years we never added in the targetFramework to the system.web > httpRuntime element (Note: it did exist on system.web > compilation element). Before taking … Read more

Why can Java not connect to MySQL 5.7 after the latest JDK update and how should it be fixed? (ssl.SSLHandshakeException: No appropriate protocol)

As @skelwa already commented you will need to add the enabledTLSProtocols=TLSv1.2 configuration property in the connection string to resolve your issue. A complete connection string for Connector/J could look like this: jdbc:mysql://<host>:<port>/<dbname>?enabledTLSProtocols=TLSv1.2 For r2dbc you will need to use tlsVersion=TLSv1.2 instead. For Connector/J v8.0.28 enabledTLSProtocols was renamed to tlsVersions (see note). However, the original name … Read more