7 File System
The RNWF02 provides an internal secured storage for storing following types of certificates and keys to use with the Transport Layer Security (TLS).
- x509 root certificates
- Client/Device certificates
- Private keys
The secured certificate store is of 60 KB in size and it is write and erase only storage space. The certificates and keys flashed in this memory is only readable through the device firmware.
The certificate store can be accessed through the AT commands. For more details on AT commands, refer to the AT Commands.
The manual certificate/key flashing would need a serial terminal application with X-Modem/Y-Modem file transfer support. In order to simplify this process the firmware release package includes a python based utility which can Flash these files through a simple CLI
The utility also support Send To option on Windows operating system where these files can be flashed into RNWF02 device through the right click options.
| Issuer | Filename | Expiry | Public Key | Signature Alg. | Notes |
|---|---|---|---|---|---|
| Amazon Root CA 1 | AmazonRootCA1.der | 17 January 2038 01:00:00 | RSA (2048 bits) | SHA256RSA | AWS Cloud |
| Baltimore CyberTrust Root | BaltimoreCyberTrustRoot.der | 13 May 2025 00:59:00 | RSA (2048 bits) | SHA1RSA | Azure Cloud |
|
DigiCert High Assurance EV Root CA | DigiCert.der | 10 November 2031 01:00:00 | RSA (2048 bits) | SHA1RSA | — |
| DigiCert Global Root G2 | DigiCertGlobalRootG2.crt | 15 January 2038 13:00:00 | RSA (2048 bits) | SHA256RSA | Azure Cloud |
|
DigiCert High Assurance EV Root CA | DigiCertSHA2.der | 22 October 2028 13:00:00 | RSA (2048 bits) | SHA256RSA | — |
|
Entrust Root Certification Authority | EnTrust.der | 27 November 2026 21:53:42 | RSA (2048 bits) | SHA1RSA | — |
| GlobalSign Root CA | GlobalSignRoot.der | 28 January 2028 13:00:00 | RSA (2048 bits) | SHA1RSA | — |
|
Internet Security Research Group Root X1 | isrgrootx1.der | 04 June 2035 12:04:38 | RSA (4096 bits) | SHA256RSA | LetsEncrypt |
| QuoVadis Root CA 2 | QuoVadis_Root.der | 24 November 2031 19:23:33 | RSA (4096 bits) | SHA1RSA | — |
|
VeriSign Class 3 Primary Certification Authority | VeriSign.der | 17 July 2036 00:59:59 | RSA (2048 bits) | SHA1RSA | — |
Setup Details – The certificate and key utility uses the AT command interface serial port of the RNWF02 module. The PC companion mode of the setup must be used to use the certificate and key utility.