Puttygen heise

SSH_RSA.jpgHi @ all,how can I import a public or private key in a router?
For example, a Cisco 3560th
I have found some conflicting answers @ cisco.com .
Background, I would like to login with PUTTY via ssh on a Cisco Router but without username and password.The login should be made with RSA Keys.
For this I need to deposit on the IOS device's the public key and on my Client the private key.
For this I've already created with PuTTYGen the two keys. The private is in the ppk format.
I still need to convert this into a different format? Since there are PEM and PKCS.
Below you can see what times I have entered. With the error message: "CRYPTO_PKI: Import PKCS12 operation failed, failure status = 0x705"
With the following error message I can do anythingCan an yone of yo u he

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