A .p10 file *is* the same as a .csr file; the Certificate Signing
Request format is defined in PKCS#10.  The only question is whether
the file content begins with an '=' character.  If it does, use
-inform PEM; if it doesn't, use -inform DER.

(Considering that it's entirely possible to differentiate a
base64-der-encoded blob as opposed to a der-encoded blob, because
there's no way that an '=' character can start a DER blob, there's
really no reason that I can see to keep the PEM versus DER distinction
on the commandline.  This is a legacy behavior from SSLeay that I
can't really see the need for.)

-Kyle H

On Tue, Jan 5, 2010 at 3:09 AM, Anton Xuereb <[email protected]> wrote:
> Hi,
> I have a certificate signing request in the form name.p10 issued by
> microsoft outlook which I am trying to sign and issue and certificate for
> from my linux server.
> I am having some problems finding the correct syntax to treat this type of
> file as other requests I have signed have come with the .csr extension.
> Any ideas ?
> Anton
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