RSA private key file created with Windows10

[Tomas Mraz]

On Wed, 2022-10-05 at 16:35 +0900, Imazu Setsuo wrote:
> Thank you immediately answer.
> 
> PKCS8, PEM, and RFC4716 formats were created and tested with the ssh-
> keygen command.
> 
> PKCS8 and PEM formatting was successful.
> 
> RFC4716 is the default on Windows10, and PEM is the default on
> CentOS7.
> 
> Does OpenSSL have any plans to support RFC4716 format in the future?

No plans for that currently. Although OpenSSL-3.0 allows to plug in
decoders in a separate provider so a third party support via a provider
would be possible.


> best regards, thank you
> Setsuo Imazu
> 
> On 2022/10/05 15:36, Tomas Mraz wrote:
> > Hello,
> > most probably the key is stored in the OpenSSH private key format.
> > You'll need to use ssh-keygen -p -m PKCS8 to convert the key into a
> > format that OpenSSL can read.
> > 
> > Tomas Mraz, OpenSSL
> > 
> > On Wed, 2022-10-05 at 15:00 +0900, Imazu Setsuo wrote:
> > > Hello.
> > > 
> > > When I read the RSA private key file created with the ssh-keygen
> > > command that comes with Windows 10 with the PEM_read_PrivateKey()
> > > function, the following error occurred.
> > > 
> > > error: 0906D06C: lib(9): func(109): reason(108)
> > > 
> > > The platform is CentOS7, OpenSSL 3.0.5.
> > > Is the private key file created with Windows 10 not supported?
> > > How can I use the private key file created in Windows 10 as well?
> > > 
> > > 
> > > best regards, thank you
> > > Setsuo Imazu
> > 

-- 
Tomáš Mráz, OpenSSL