ST_IotSocketTls

The following type contains the TLS security settings for the HTTP client and the WebSocket client.
Either CA (Certificate Authority) or PSK (PreSharedKey) can be used.

Syntax

Definition:

TYPE ST_IotSocketTls :
STRUCT
    sCA                : STRING(255*);
    sCert              : STRING(255*);
    sKeyFile           : STRING(255*);
    sKeyPwd            : STRING(255*);
    sCrl               : STRING(255*);
    sCiphers           : STRING(255*);
    sVersion           : STRING(80) := 'tlsv1.2';
    bNoServerCertCheck : BOOL := FALSE;

    sPskIdentity       : STRING(255*);
    aPskKey            : ARRAY[1..64*] OF BYTE;
    nPskKeyLen         : USINT;
END_STRUCT
END_TYPE

Parameter

Name	Type	Description
sCA	STRING(255)	Certificate of the certificate authority (CA)
sCert	STRING(255)	Client certificate for server authentication
sKeyFile	STRING(255)	Private key of the client
sKeyPwd	STRING(255)	Password of the private key, if applicable
sCrl	STRING(255)	Path to the certificate revocation list, which may be present in PEM or DER format
sCiphers	STRING(255)	Cipher suites to be used, specified in OpenSSL string format
sVersion	STRING(80)	TLS version to be used
bNoServerCertCheck	BOOL	Disables verification of the server certificate validity. If communication is to take place without TLS encryption (HTTP/WebSockets), this value must remain FALSE.
sPskIdentity	STRING(255)	PreSharedKey identity for TLS PSK connection
aPskKey	ARRAY[1..64] OF BYTE	PreSharedKey for TLS PSK connection
nPskKeyLen	USINT	Length of the PreSharedKey in bytes

All strings and arrays marked with an * are initialized with the value in brackets. These values can be accessed and changed via the parameter list. This is not possible at runtime, but only before the code is compiled.