Thursday, March 31, 2016

HOWTO - Set up Raspberry IP Camera on Synology Surveillance station

Let's get ready to use the Raspberry Pi as low-cost Full HD surveillance IP camera.
First download your copy of the Raspberry IP Camera software at
After downloading, write the image to SD card with the win32diskimager software.
Put your SD card into the Raspberry, boot it up, scan your network for the right IP address of the IP Camera as it will be autoconfigured by DHCP.

Set up the Camera for usage with Synology Surveillance station:

1. Log in to the web interface with admin as username and raspberry as password.

2. Click the camera settings entry on the menu bar.

3. Set the camera to it's highest resolution, after that set the format to H264 (Streamable over RTSP), after that, click apply on the bottom of the page.

Now add the IP Camera to your Synology Surveillance Station:

1. Open your Synology Surveillance Station web interface, and open your IP Camera control panel.

2. Select 'add', then select 'Add Camera'.

3. Select 'complete' and click 'next'.

4. Name your Camera, fill in the IP address, set the port number to 8554, select User Define as brand, and set the source path to / (note that the password for this is blank, so do not enter a password)

Monday, March 21, 2016

HOWTO - use openssl on linux - a bunch of useful openssl commands to use

Generate CSRs, Certificates, Private Keys and do other miscellaneous tasks:

Generate a new private key and Certificate Signing Request
  • openssl req -out CSR.csr -new -newkey rsa:2048 -nodes -keyout privateKey.key

Generate a self-signed certificate
  • openssl req -x509 -sha256 -nodes -days 365 -newkey rsa:2048 -keyout privateKey.key -out certificate.crt

Generate a certificate signing request (CSR) for an existing private key
  • openssl req -out CSR.csr -key privateKey.key -new

Generate a certificate signing request based on an existing certificate
  • openssl x509 -x509toreq -in certificate.crt -out CSR.csr -signkey privateKey.key

Remove a passphrase from a private key
  • openssl rsa -in privateKey.pem -out newPrivateKey.pem

Checking Using OpenSSL:
If you need to check the information within a Certificate, CSR or Private Key, use these commands.

Check a Certificate Signing Request (CSR)
  • openssl req -text -noout -verify -in CSR.csr

Check a private key
  • openssl rsa -in privateKey.key -check

Check a certificate
  • openssl x509 -in certificate.crt -text -noout

Check a PKCS#12 file (.pfx or .p12)
  • openssl pkcs12 -info -in keyStore.p12

Debugging Using OpenSSL:
If you are receiving an error that the private doesn't match the certificate or that a certificate that you installed to a site is not trusted, try one of these commands.

Check an MD5 hash of the public key to ensure that it matches with what is in a CSR or private key
  • openssl x509 -noout -modulus -in certificate.crt | openssl md5
  • openssl rsa -noout -modulus -in privateKey.key | openssl md5
  • openssl req -noout -modulus -in CSR.csr | openssl md5

Check an SSL connection. All the certificates (including Intermediates) should be displayed
  • openssl s_client -connect

Converting Using OpenSSL:

These commands allow you to convert certificates and keys to different formats to make them compatible with specific types of servers or software. For example, you can convert a normal PEM file that would work with Apache to a PFX (PKCS#12) file and use it with Tomcat or IIS.
Convert a DER file (.crt .cer .der) to PEM
  • openssl x509 -inform der -in certificate.cer -out certificate.pem

Convert a PEM file to DER
  • openssl x509 -outform der -in certificate.pem -out certificate.der

Convert a PKCS#12 file (.pfx .p12) containing a private key and certificates to PEM
  • openssl pkcs12 -in keyStore.pfx -out keyStore.pem -nodes

You can add -nocerts to only output the private key or add -nokeys to only output the certificates.
Convert a PEM certificate file and a private key to PKCS#12 (.pfx .p12)
  • openssl pkcs12 -export -out certificate.pfx -inkey privateKey.key -in certificate.crt -certfile CACert.crt