static int
handleChap(isess_t *sess, pdu_t *pp)
{
pdu_t spp;
login_req_t *lp;
isc_opt_t *op = sess->op;
char *ap, *ip, *cp, *digest; // MD5 is 128bits, SHA1 160bits
debug_called(3);
bzero(&spp, sizeof(pdu_t));
lp = (login_req_t *)&spp.ipdu.bhs;
lp->cmd = ISCSI_LOGIN_CMD | 0x40; // login request + Inmediate
memcpy(lp->isid, sess->isid, 6);
lp->tsih = sess->tsih; // MUST be zero the first time!
lp->CID = htons(1);
lp->CSG = SN_PHASE; // Security Negotiation
lp->NSG = LON_PHASE;
lp->T = 1;
if(((ap = getkeyval("CHAP_A=", pp)) == NULL) ||
((ip = getkeyval("CHAP_I=", pp)) == NULL) ||
((cp = getkeyval("CHAP_C=", pp)) == NULL))
return -1;
if((digest = chapDigest(ap, (char)strtol(ip, (char **)NULL, 0), cp, op->chapSecret)) == NULL)
return -1;
addText(&spp, "CHAP_N=%s", op->chapIName? op->chapIName: op->initiatorName);
addText(&spp, "CHAP_R=%s", digest);
free(digest);
if(op->tgtChapSecret != NULL) {
op->tgtChapID = (random() >> 24) % 255; // should be random enough ...
addText(&spp, "CHAP_I=%d", op->tgtChapID);
cp = genChapChallenge(cp, op->tgtChallengeLen? op->tgtChallengeLen: 8);
addText(&spp, "CHAP_C=%s", cp);
op->tgtChapDigest = chapDigest(ap, op->tgtChapID, cp, op->tgtChapSecret);
}
main(int cc, char **vv)
{
char *p, *ap, *ip, *cp, *chapSecret, *digest;
int len;
#if 0
ap = "5";
chapSecret = "0xa5aff013dd839b1edd31ee73a1df0b1b";
// chapSecret = "abcdefghijklmnop";
len = str2bin(chapSecret, &cp);
puke(chapSecret, cp, len);
ip = "238";
cp = "0xbd456029";
if((digest = chapDigest(ap, ip, cp, chapSecret)) != NULL) {
len = str2bin(digest, &cp);
puke(digest, cp, len);
}
#else
printf("%d] %s\n", 24, genChallenge("0X", 24));
#endif
}