OpenSSL or CDSA for Portable TLS?

bfrog asks: "I'm looking for a portable C/C++ client & server TLS library for Windows, Linux, Solaris, and Mac OS X. The license must be commercial-code-friendly. It seems like the choices are: the old standby OpenSSL; or CDSA . Apple makes a convincing argument for CDSA over OpenSSL in this PDF document , but I'm having trouble finding a mature CDSA implementation that's ready to go on all of these platforms. Perhaps I should use the best CDSA implementation for each given platform, and hope that the API's are compatible. That is, after all, the point of CDSA, right? Any suggestions?"