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Message from discussion genpkey ignores "-outform DER"
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"Stephen Henson via RT"  
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 More options Nov 5 2012, 11:45 am
Newsgroups: mailing.openssl.dev
From: r...@openssl.org ("Stephen Henson via RT")
Date: Mon, 5 Nov 2012 17:44:52 +0100 (CET)
Local: Mon, Nov 5 2012 11:44 am
Subject: [openssl.org #2904] genpkey ignores "-outform DER"
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> [vpodz...@redhat.com - Tue Oct 30 17:34:05 2012]:

> Description of problem:
> Running

> $ openssl genpkey -genparam -outform DER -out dh_params.der -algorithm
> DH

> generates data in the PEM format instead of the requested DER format.

> Version-Release number of selected component (if applicable):
> openssl-1.0.0j-2.fc17.i686

> Steps to Reproduce:
> 1. run command from the description
> 2. run 'file dh_params.der'

> Actual results:
> ASCII text

> Expected results:
> data

> Additional info:
> Deprecated (according to openssl(1)) command

> $ openssl dhparam -outform DER -out dh_params.der

> works as expected.

When the pkey utilities (and associated functions) are presented with a
file they have to automatically decide which algorithm to use. This is
fine for public and private key formats which include the algorithm OID
in the associated structures (SubjectPublicKeyInfo or PKCS#8) or the PEM
headers for older private key formats.

In the case of parameters there isn't a DER format that includes the
algorithm type as an OID, just the PEM format where the algorithm to use
is part of the headers.

Steve.
--
Dr Stephen N. Henson. OpenSSL project core developer.
Commercial tech support now available see: http://www.openssl.org

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