Does edtFTPj/Pro support the following key exchange algorithms?

Question

The server we connect to will be limited in the near future to the following algorithms...

Host key algorithms:

• rsa-sha2-256     <- support added in v7.3.0?
• rsa-sha2-512     <- support added in v7.3.0?
• ssh-ed25519

Key exchange algorithms:

• curve25519-sha256
• diffie-hellman-group16-sha512
• diffie-hellman-group18-sha512

From looking through the API documentation, it appears that some of the host key algorithms are covered but I didn't see any of the key exchange algorithms listed.  Can anyone confirm that these are not currently supported? and if they are not currently supported, are there plans to implement these anytime soon?

Answer 1

• rsa-sha2-256    Supported
• rsa-sha2-512    Supported
• ssh-ed25519    Not Supported

Supported Key exchange Algorithms: 
 

KEY_EXCHANGE_DIFFIE_HELLMAN_GROUP_EXCHANGE_SHA1

KEY_EXCHANGE_DIFFIE_HELLMAN_GROUP_EXCHANGE_SHA256

KEY_EXCHANGE_DIFFIE_HELLMAN_GROUP1_SHA1

KEY_EXCHANGE_DIFFIE_HELLMAN_GROUP14_SHA1

KEY_EXCHANGE_DIFFIE_HELLMAN_GROUP14_SHA256

KEY_EXCHANGE_ECDH_SHA2_NISTP256

KEY_EXCHANGE_ECDH_SHA2_NISTP384

KEY_EXCHANGE_ECDH_SHA2_NISTP521

Comments

Hi Stuart,

Does EDT have any plans to support
diffie-hellman-group16-sha512 and
diffie-hellman-group18-sha512
in the near future?

We have customers who are connecting to MoveIT and they will drop the support of dh-group14 and dh-group-exchange by July. This will be a huge impact to anyone using EDT to connect to MoveIT.

https://community.progress.com/s/article/Cloud-SSH-Ciphers-Key-Exchanges-and-Hashes

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Yes,  diffie-hellman-group16-sha512 and diffie-hellman-group18-sha512 are down to be added (we’ve already added them to our .net library).

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We'll put it in the next major release

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Thank you, Stuart. Last question, when is the next major release coming out?

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Hopefully next week

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Thank you! We will wait for the release so we can update our product.

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