BrSecurity

Security Functions for B&R Automation Studio.

Download the Automation Studio Library here

---

Password Hashing

SecGenPwdHash

implements bcrypt password hashing (origin: Open BSD). The maximum password length is limited to 56 characters.

You can check the hash online at https://bcrypt-generator.com or with Bcrypt.cpp in your own program.

SecValidatePwd

validates user’s password against stored hash

PROGRAM _CYCLIC

	IF( generate_hash )THEN	
		result_password_hash := SecGenPwdHash( password, 10, password_hash );
		password := '';  (* never store password directly !! *)
		generate_hash := FALSE;
	END_IF


	password_is_valid := SecValidatePwd( password, password_hash );
  
END_PROGRAM

Data Encryption / Decryption

SecBlfInit

implements Blowfish data encryption (origin: Open BSD). Prepares and stores the Blowfish context with the given key. Use ‘ctx’ output for SecBlfEncrypt() and SecBlfDecrypt.

SecBlfEncrypt

Encrypts data pointed to by ‘data’ with length ‘data_len’

SecBlfDecrypt

Decrypt data pointed to by ‘data’ with length ‘data_len’

You can check the data encryption online at http://sladex.org/blowfish.js/

PROGRAM _INIT
	brsstrcpy( ADR(data), ADR('Lorem ipsum dolor sit amet, consetetur sadipscing elitr') );
	SecBlfInit_0( key := 'top_secret' );	
	
END_PROGRAM

PROGRAM _CYCLIC
	IF( encode ) THEN
		encode := FALSE;		
		SecBlfEncrypt( SecBlfInit_0.ctx, ADR(data), brsstrlen(ADR(data)) );
	END_IF
	
	IF( decode ) THEN
		decode := FALSE;
		SecBlfDecrypt( SecBlfInit_0.ctx, ADR(data), brsstrlen(ADR(data)) );		
	END_IF
	 
END_PROGRAM

---

License

to comply with the copyright requirements, the library writes to the logbook the first time functions are called.