[openssl-users] convert from PEM to DER format or vice versa

[Jakob Bohm]

On 12/12/2016 10:37, Sairam Rangaswamy -X (sairanga - ARICENT 
TECHNOLOGIES MAURIITIUS LIMITED at Cisco) wrote:
>
> As I understand, the X509 certificates from CA or self-signed can be 
> created in either
>
> PEM or DER format.
>
> Is there a way to programmatically convert the PEM format file to DER 
> or DER to PEM?
>
> Is there a single API or set of APIs available from openssl libraries?
>
>
It's simple Base64 conversion.  The PEM file is the DER file
Base64 encoded and decorated with 4 fixed lines that mark it
as a certificate (two blank lines and two lines with a lot
of dashes).

No need to use the i2d_X509/d2i_X509 functions that convert to and
from an internal OpenSSL data structure

Enjoy

Jakob
-- 
Jakob Bohm, CIO, Partner, WiseMo A/S.  https://www.wisemo.com
Transformervej 29, 2860 Søborg, Denmark.  Direct +45 31 13 16 10
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