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How do I convert my PEM certificate to a DER certificate format?

Summary

Certificate File Conversion - PEM to DER


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Applicable to:  Specific vendors and versions of server software or browser software may prefer the DER encoded format over Base64 (PEM)

Entrust Datacard Cloud Services issues Base64 encoded (PEM) server certificates

Normally, you can use OpenSSL or Internet Explorer on a Windows system.

OpenSSL conversion steps:

openssl x509 -in cert.pem -out cert.der -outform DER

(where cert.pem is your server cert and cert.der is your new file name)

Internet Explorer conversion steps:

1. Download the standard format certificate and save it into a text file with the complete "-----BEGIN CERTIFICATE----- ", " -----END CERTIFICATE----- " lines, and no other characters included.

2. Import the certificate file into Internet Explorer:

Tools > Internet Options > Content > Certificates > Import > Select certificate file.

The certificate should then be stored in your 'Other People' certificate store (you can view it under ' Other People ').

3. Select the certificate > Export > select "DER ENCODED Binary X.509 (.cer)" > Choose a file name and save.

You now have a DER encoded certificate file for your use.

If you have any questions or concerns please contact the Entrust Certificate Services Support department for further assistance:

Hours of Operation:
Sunday 8:00 PM ET to Friday 8:00 PM ET
North America (toll free): 1-866-267-9297
Outside North America: 1-613-270-2680 (or see the list below)
NOTE: Smart Phone users may use the 1-800 numbers shown in the table below.
Otherwise, it is very important that international callers dial the UITF format exactly as indicated. Do not dial an extra "1" before the "800" or your call will not be accepted as an UITF toll free call.

Country Number
Australia 0011 - 800-3687-7863
1-800-767-513
Austria 00 - 800-3687-7863
Belgium 00 - 800-3687-7863
Denmark 00 - 800-3687-7863
Finland 990 - 800-3687-7863 (Telecom Finland)
00 - 800-3687-7863 (Finnet)
France 00 - 800-3687-7863
Germany 00 - 800-3687-7863
Hong Kong 001 - 800-3687-7863 (Voice)
002 - 800-3687-7863 (Fax)
Ireland 00 - 800-3687-7863
Israel 014 - 800-3687-7863
Italy 00 - 800-3687-7863
Japan 001 - 800-3687-7863 (KDD)
004 - 800-3687-7863 (ITJ)
0061 - 800-3687-7863 (IDC)
Korea 001 - 800-3687-7863 (Korea Telecom)
002 - 800-3687-7863 (Dacom)
Malaysia 00 - 800-3687-7863
Netherlands 00 - 800-3687-7863
New Zealand 00 - 800-3687-7863
0800-4413101
Norway 00 - 800-3687-7863
Singapore 001 - 800-3687-7863
Spain 00 - 800-3687-7863
Sweden 00 - 800-3687-7863 (Telia)
00 - 800-3687-7863 (Tele2)
Switzerland 00 - 800-3687-7863
Taiwan 00 - 800-3687-7863
United Kingdom 00 - 800-3687-7863
0800 121 6078
+44 (0) 118 953 3088