PuTTY wish puttygen-openssh-aes-ctr

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summary: Support OpenSSH 7.6+ aes256-ctr-encypted private keys
class: wish: This is a request for an enhancement.
difficulty: fun: Just needs tuits, and not many of them.
fixed-in: 044a9304e3215c1933f6afde35aab594d8631639 (0.71)

As of OpenSSH 7.6, ssh-keygen produces its new-format private keys encoded with the aes256-ctr cipher, instead of aesctr-cbc. (bz#2754)

PuTTYgen needs to understand this new (to us) format variant when importing private keys. In 0.70 it says "unrecognised cipher name".

Also, we changed to outputting new-style OpenSSH keys with this cipher mode, unconditionally. (Older versions of OpenSSH seem to understand aes256-ctr encrypted keys, so this doesn't seem to be an interoperability problem.)

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(last revision of this bug record was at 2019-03-19 00:43:48 +0000)

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