SEC 2.0 Reference Device Driver User's Guide

Table Of Contents

SEC 2.0 Reference Device Driver User’s Guide, Rev. 0

36 PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE Freescale Semiconductor

Sample Code

unsigned long ivBytes;

unsigned char *ivData;

unsigned long HeaderBytes;

unsigned long inBytes;

unsigned char *inData;

unsigned long ROCBytes;

unsigned long cryptDataBytes;

unsigned char *cryptDataOut;

unsigned long digestBytes;

unsigned char *digestData;

unsigned long outIvBytes;

unsigned char *outIvData;

NUM_SRTP_DESC defines the number of descriptors within the DPD_SRTP_GROUP that use this request.

DPD_SRTP_GROUP (0x8500) defines the group for all descriptors within this request.

5 Sample Code

The following sections provide sample codes for DES and IPSec.

5.1 DES Sample

/* define the User Structure */

DES_LOADCTX_CRYPT_REQ desencReq;

...

/* fill the User Request structure with appropriate pointers */

desencReq.opId = DPD_TDES_CBC_ENCRYPT_SA_LDCTX_CRYPT ;

desencReq.channel = 0; /* dynamic channel */

desencReq.notify = (void*) notifyDes; /* callback function */

desencReq.notify_on_error = (void*) notifyDes; /* callback in case of

errors only */

Table 30 . SRTP_REQ Valid Descriptors (opId)

Descriptors Value Function Description

DPD_SRTP_OUTBOUND 0x8500 Process an outbound SRTP packet

DPD_SRTP_INBOUND 0x8501 Process an inbound SRTP packet