Aes 256 Cbc

It looks like as of this writing, the PuTTY Gen conversion code only accepts keys that use the AES-128-CBC or DES-EDE3-CBC ciphers. Otherwise, it will complain with a 'unsupported cipher' error. (The latest release version at the moment is beta 0.67.)

For example, one of my private keys was using AES-256-CBC:

The Advanced Encryption Standard (AES) is a specification for the encryption of electronic data published by the U.S. Government as NIST standard in 2001. The standard comprises three block ciphers, AES-128, AES-192, and AES-256, adopted from a larger collection originally published as Rijndael. AES encryption and decryption online tool for free.It is an aes calculator that performs aes encryption and decryption of image, text and.txt file in ECB and CBC mode with 128, 192,256 bit. The output can be base64 or Hex encoded.

Note that if your key is encrypted with a passphrase or has a MAC(?), you might only see a header like: Minitool power data recovery 7.0 key generator.

Aes 256 Cbc

The 'openssl' tool can be used to convert an existing private key to one of the acceptable formats above. Which of the two is another discussion, but hey, here is some insight. Rsa 2048 key strength.

Aes 256 Cbc Key Generator