Adam Langley's tool for testing for OpenSSL CVE-2014-0224, originally published here: https://www.imperialviolet.org/2014/06/05/earlyccs.html
To build the tool:
$ export GOPATH=$(pwd)
$ go build openssl-ccs-cve-2014-0224.go
Tested with go 1.2.2 and 1.3.
The src/my-tls directory contains the patched version of the crypto/tls package.