Re: convert from PEM to DER format or vice versa

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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
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