jwtAlgGet (Function)

jwtAlgGet returns the encryption algorithm used by the JWT object.

Should be used every time a JWT has been decoded with jwtDecodeAsym and jwtDecodeSym to validate that it was correctly signed.

Can also be used to get the value set with jwtAlgSetAsym and jwtAlgSetSym.

Input:

jwt : SYSHANDLE

The JWT object to check.

Returns: INT

The encryption algorithm used:

Declaration:

FUNCTION jwtAlgGet : INT;
VAR_INPUT
  jwt   : SYSHANDLE;
END_VAR;

Example:

INCLUDE rtcu.inc
 
PROGRAM test;
VAR
  rc  : INT;
  jwt : SYSHANDLE;
END_VAR;
 
BEGIN
  ...
  // Get algorithm
  rc := jwtAlgGet(jwt := jwt);
  ...
END;
 
END_PROGRAM;