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Debugging Secure Transport issue with server
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Debugging Secure Transport issue with server



Background: I work on the file transfer app Transmit. As of version 4.0, we switched from using OpenSSL to Secure Transport, primarily because our old code was leaky and poorly understood, which I worried would lead to bugs. As with any rewrite, however, the new implementation has new bugs.

The bug I am looking at now involves the CrushFTP server software: for some reason Transmit 4 is no longer able to connect using SSL, whereas Transmit 3 works fine. I've been twiddling various parameters trying to figure out what's wrong, but I'm getting nowhere. Our OpenSSL code manages to negotiate SSLv3 with what Secure Transport calls TLS_DH_RSA_WITH_AES_256_CBC_SHA, but which doesn't appear to be supported.

I'm guessing what would be best at this point is a debug version of the Secure Transport framework. Does such a thing exist or should I build one myself? Thanks,

Ned

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