Method for modifying a test profile in an integrated circuit card, corresponding integrated circuit card, testing method and apparatus

An integrated circuit, comprising:

• a memory, which, in operation, stores an Elementary File Test (EFT) file and an application, the EFT file including a record storing information to update a target elementary file (TGF) in a file system of the EFT file, the stored information including:
• a file path identifier identifying a position of the TGF in the file system of the EFT file, wherein the file path identifier is a concatenation of a parent file identifier of a parent file of the TGF in the file system of the EFT file, followed by an identifier of the TGF in the file system of the EFT file;
• a first length indicator to indicate a length of a first type of data;
• first data of the first type having a length corresponding to the length indicated by the first length indicator;
• a second length indicator to indicate a length of a second type of data;
• and
• second data of the second type having a length corresponding to the length indicated by the second length indicator;
• and
• processing circuitry coupled to the memory, wherein processing circuitry, in operation, executes the application to update the TGF based on the stored information, the updating the TGF including:
• identifying the TGF based on the file path identifier;
• and
• updating content of the TGF to include:
• the first data;
• and
• one or more instances of the second data, wherein a number of the one or more instances of the second data is based on a size of the TGF.

A system, comprising:

• a mobile communication interface;
• and
• an integrated circuit coupled to mobile communication interface, the integrated circuit including:
• a memory, which, in operation, stores an Elementary File Test (EFT) file and an application, the EFT file including a record storing information to update a target elementary file (TGF) in a file system of the EFT file, the stored information including:
• a file path identifier identifying a position of the TGF in the file system of the EFT file, wherein the file path identifier is a concatenation of a parent file identifier of a parent file of the TGF in the file system of the EFT file, followed by an identifier of the TGF in the file system of the EFT file;
• a first length indicator to indicate a length of a first type of data;
• first data of the first type having a length corresponding to the length indicated by the first length indicator;
• a second length indicator to indicate a length of a second type of data;
• and
• second data of the second type having a length corresponding to the length indicated by the second length indicator;
• and
• processing circuitry coupled to the memory, wherein processing circuitry, in operation, executes the application to update the TGF based on the stored information, the updating the TGF including:
• identifying the TGF based on the file path identifier;
• and
• updating content of the TGF to include:
• the first data;
• and
• one or more instances of the second data, wherein a number of the one or more instances of the second data is based on a size of the TGF.

A non-transitory computer-readable medium having contents which configure processing circuitry to perform a method, the method comprising:

• storing, in a record of an Elementary File Test (EFT) file of an integrated circuit, information to update a target elementary file (TGF) in a file system of the EFT file, the stored information including:
• a file path identifier identifying a position of the TGF in the file system of the EFT file, wherein the file path identifier is a concatenation of a parent file identifier of a parent file of the TGF in the file system of the EFT file, followed by an identifier of the TGF in the file system of the EFT file;
• a first length indicator to indicate a length of a first type of data;
• first data of the first type having a length corresponding to the length indicated by the first length indicator;
• a second length indicator to indicate a length of a second type of data;
• and
• second data of the second type having a length corresponding to the length indicated by the second length indicator;
• and
• updating the TGF based on the stored information, the updating the TGF including:
• identifying the TGF based on the file path identifier;
• and
• updating content of the TGF to include:
• the first data;
• and
• one or more instances of the second data, wherein a number of the one or more instances of the second data is based on a size of the TGF.