Re: CTR mode

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On 03/31/14 05:40 PM, no_spam_98@xxxxxxxxx wrote:
OpenSSH uses its own CTR mode implementation, correct?  I seem to recall some discussion about why it hasn't/won't switch over to using OpenSSL's implementation, but I can't find the thread anymore.

So... why doesn't OpenSSH use OpenSSL's CTR mode implementation?

If you are speaking of CTR mode to AES, it does use OpenSSL for that.

For some time it didn't, because OpenSSL's envelope API didn't provide it, but when OpenSSL introduced it, OpenSSH's own implementation was ditched [1].

Tomas

[1] http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/cipher.c#rev1.84
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