Gude Expert Power Control 8021 Series, Manual

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Expert Power Control 8021/8025 © 2021 GUDE Systems GmbH
Specifications
Usually OpenSSL is used to create an SSL certificate. For Windows for example, there is the
light version of
Shining Light Productions
. There you open a command prompt, change to the
directory "C:\OpenSSL-Win32\bin" and set these environment variables:
set openssl_conf=C:\OpenSSL-Win32\bin\openssl.cfg
set RANDFILE=C:\OpenSSL-Win32\bin\.rnd
Here are some examples for the generation with OpenSSL:
Creation of a self-signed RSA 2048-bit certificate
openssl genrsa -out server.key 2048
openssl req -new -x509 -days 365 -key server.key -out server.crt
RSA 2048-bit certificate with Sign Request:
openssl genrsa -out server.key 2048
openssl req -new -key server.key -out server.csr
openssl req -x509 -days 365 -key server.key -in server.csr -out server.crt
The server keys should be created with "openssl genrsa". The Gude device pro-
cesses keys in the traditional PKCS#1 format. This can be recognized by the fact that
the generated key file starts with "-----BEGIN RSA PRIVATE KEY-----". If the file starts
with "-----BEGIN PRIVATE KEY-----", the file is in PKCS#8 format and the key is not re-
cognized. If you have only a key in PKCS#8 format, you can convert it to PKCS#1 with
openssl: "
openssl rsa -in pkcs8.key -out pkcs1.key ".
ECC Certificate with Sign Request:
openssl ecparam -genkey -name prime256v1 -out server.key
openssl req -new -key server.key -out server.csr
openssl req -x509 -days 365 -key server.key -in server.csr -out server.crt
If you have created your key and certificate, both files are concatenated to one file:
Linux:
cat server.crt server.key > server.pem
Windows:
copy server.crt + server.key server.pem
The created server.pem can only be uploaded in the maintenance section of the
device.
If several certificates (Intermediate CRT's) should also be uploaded to the device,
one should make sure, that firstly the server certificate and secondly the Intermediates
are assembled , e.g:
cat server.crt IM1.crt IM2.crt server.key > server.pem
An uploaded certificate will be preserved, when a device is put back to factory de-
faults .
Performance Considerations
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