OsmoDevCall - Using pySim-shell on sysmoISIM-SJA5 cards

Using pySim-shell on sysmoISIM-SJA5 cards requires understanding of complex card configuration, 3GPP specifications, and file systems, as well as encryption and integrity protection.

Key takeaways

Using pySim-shell on sysmoISIM-SJA5 cards requires understanding of different commands and groups of commands.
Card configuration is complex, with many files and options, and understanding of the 3GPP specifications is necessary.
The TUAC command is used to configure the card’s operating system, and the CFG file is used to store configuration data.
The EF (Elementary File) structure is used to store data on the card, and files like EF.FPLMN and EF.IMSI contain network configuration data.
The USIM application is used to store user authentication information, and the ADF (Application Dedicated File) structure is used to store application-specific data.
Cards can be configured to support different networks, with the MCC and MNC values determining the network settings.
The PNN file contains provider network names, and the FPLMN file contains the frequency plan for the network.
Card security is protected by using encryption and integrity protection, and the EFS (Elementary File Structure) is used to store sensitive data.
Cards can be configured to support different file systems, with the dir command being used to navigate the file system.
Understanding of the JSON (JavaScript Object Notation) format is necessary to work with card data.
PySim is a tool used to work with sysmoISIM-SJA5 cards, and it provides a Python interface to the card’s functionality.
PySim can be used to enable and disable files and services on the card, as well as to read and write data to the card.
Understanding of the 3GPP specifications is necessary to use PySim effectively.
The cfg file is used to store configuration data on the card, and the key material is used to encrypt and decrypt data.
Cards can be configured to support different levels of security, with the USIM application being used to store sensitive data.
The TUAC command is used to configure the card’s operating system, and the CFG file is used to store configuration data.
The EF structure is used to store data on the card, and files like EF.FPLMN and EF.IMSI contain network configuration data.
Understanding of the JSON format is necessary to work with card data.
PySim can be used to enable and disable files and services on the card, as well as to read and write data to the card.

OsmoDevCall - Using pySim-shell on sysmoISIM-SJA5 cards

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