78 #define	KRB_CHALLENGE	3		/* Challenge for mutual auth. */
87 static Block	challenge	= { 0 };  variable
196 	 * the challenge, and verify it when the response comes back.  in kerberos4_send()
204 		DES_ecb_encrypt(&session_key, &challenge, sched, 0);  in kerberos4_send()
206 		 * Increment the challenge by 1, and encrypt it for  in kerberos4_send()
211 			x = (unsigned int)challenge[i] + 1;  in kerberos4_send()
212 			challenge[i] = x;	/* ignore overflow */  in kerberos4_send()
216 		DES_ecb_encrypt(&challenge, &challenge, sched, 1);  in kerberos4_send()
296 		 * Take the received encrypted challenge, and encrypt  in kerberos4_is()
306 		 * Now decrypt the received encrypted challenge,  in kerberos4_is()
309 		DES_ecb_encrypt(&datablock, &challenge, sched, 0);  in kerberos4_is()
312 			t = (unsigned int)challenge[r] + 1;  in kerberos4_is()
313 			challenge[r] = t;	/* ignore overflow */  in kerberos4_is()
317 		DES_ecb_encrypt(&challenge, &challenge, sched, 1);  in kerberos4_is()
318 		Data(ap, KRB_RESPONSE, challenge, sizeof(challenge));  in kerberos4_is()
352 			 * Send over the encrypted challenge.  in kerberos4_reply()
372 		 * Verify that the response to the challenge is correct.  in kerberos4_reply()
375 		    (0 != memcmp((void *)data, (void *)challenge,  in kerberos4_reply()
376 						sizeof(challenge))))  in kerberos4_reply()
379 			printf("[ Kerberos V4 challenge failed!!! ]\r\n");  in kerberos4_reply()
384 		printf("[ Kerberos V4 challenge successful ]\r\n");  in kerberos4_reply()
443 		strncpy((char *)buf, " CHALLENGE", buflen);  in kerberos4_printsub()