ScFileStorage generated 2048 key has only 2047 bit

[tam]

Hi.

I'm using Delphi 11.0 and SecureBridge 10.0.1 on Windows 10 64 bit.

When I generate a 2048 bit key it's actually only 2027 bit long.

ScFileStorage tab "Keys"-> New -> key1 -> RSA -> 2048 -> Generate -> Export private key -> key1.ssl

Code: Select all

ssh-keygen -l -f key1.ssl
2047 SHA256:ILaFe1PngtvmbGgr/W7rNLwxxOZH4jpMC13FejrL45E no comment (RSA)

[tam]

Anyone please?

I need a solution soon, because our business partner only accepts 2048 bit keys.

[dzhanhira]

Hi Tam,

Thanks for contacting us and sorry for the delay, which is caused due to the Russian aggression into Ukraine.

So let me kindly clarify:
When generating a key, the last bit can be set to 0, and then the key size will be one bit less.
SecureBridge permits the generation and use of such keys.

To solve the issue, please regenerate the key, if it's necessary, do it several times until it is exactly 2048 bits.

[tam]

Hey dzhanhir,

thanks for your help, it's working now.

But I think it would be better to avoid creating any other key size than selected within the ScFileStorage.

[dzhanhira]

Dear Tam,

Thanks for the suggestion!

Kindly be informed that we will consider this feature in one of the following builds.