int cbcreate(struct bsdconv_instance *ins, struct bsdconv_hash_entry *arg){
struct my_s *r=THIS_CODEC(ins)->priv=malloc(sizeof(struct my_s));
int i;
r->min_len=1;
r->after=NULL;
r->before=NULL;
char *filter="PRINT";
char *after="010A";
char *before=NULL;
while(arg){
if(strcasecmp(arg->key, "FOR")==0){
filter=arg->ptr;
}else if(strcasecmp(arg->key, "MIN-LEN")==0 && sscanf(arg->ptr, "%d", &i)==1){
r->min_len=i;
}else if(strcasecmp(arg->key, "AFTER")==0){
after=arg->ptr;
}else if(strcasecmp(arg->key, "BEFORE")==0){
before=arg->ptr;
}else{
free(r);
return EINVAL;
}
arg=arg->next;
}
r->filter=load_filter(filter);
if(r->filter==NULL){
free(r);
return EOPNOTSUPP;
}
if(after){
r->after=str2data(after, &i, ins);
if(i){
if(r->after)
DATA_FREE(ins, r->after);
free(r);
return i;
}
}
if(before){
r->before=str2data(before, &i, ins);
if(i){
if(r->after)
DATA_FREE(ins, r->after);
if(r->before)
DATA_FREE(ins, r->before);
free(r);
return i;
}
}
DATA_MALLOC(ins, r->qh);
r->qh->flags=0;
r->qh->next=NULL;
return 0;
}
void opcode_chain_serialize(opcode_chain_t oc, opcode_dict_t od, program_t p, void* dl_handle) {
slist_node_t sn;
opcode_chain_node_t ocn;
word_t ofs = program_get_code_size(p), backup=ofs, code_sz=0, data_sz=0;
/*
* 1st pass : compute labels addresses and init data segment
*/
sn = list_head(oc);
while(sn!=NULL) {
ocn = node_value(opcode_chain_node_t,sn);
switch(ocn->type) {
case NodeLabel:
ocn->lofs=ofs;
program_add_label(p,ofs,ocn->name);
break;
case NodeData:
data_sz+= 2*atoi(ocn->arg);
/*vm_printf("data rep %i\n",atoi(ocn->arg));*/
break;
case NodeOpcode:
ofs+=2; /* two words per instruction */
code_sz+=2;
break;
case NodeLangPlug:
case NodeLangDef:
default:;
};
sn=sn->next;
}
/* reserve segments sizes */
program_reserve_code(p, code_sz);
program_reserve_data(p, data_sz?2+data_sz:0);
/*
* 2nd pass : serialize opcodes
*/
ofs=backup;
sn = list_head(oc);
while(sn!=NULL) {
ocn = node_value(opcode_chain_node_t,sn);
if(ocn->type==NodeOpcode) {
opcode_serialize(od,oc,ofs,ocn,p,dl_handle);
ofs+=2;
} else if(ocn->type==NodeData) {
long rep = atoi(ocn->arg);
word_t dat = str2data(p,(vm_data_type_t)ocn->arg_type,ocn->name);
dynarray_t data_seg = &p->data;
while(rep>0) {
dynarray_set(data_seg,dynarray_size(data_seg), ocn->arg_type);
dynarray_set(data_seg,dynarray_size(data_seg), dat);
rep-=1;
}
}
sn=sn->next;
}
}
static krb5_error_code
process_reply (krb5_context context,
krb5_auth_context auth_context,
int is_stream,
int sock,
int *result_code,
krb5_data *result_code_string,
krb5_data *result_string,
const char *host)
{
krb5_error_code ret;
u_char reply[1024 * 3];
ssize_t len;
u_int16_t pkt_len, pkt_ver;
krb5_data ap_rep_data;
int save_errno;
len = 0;
if (is_stream) {
while (len < sizeof(reply)) {
unsigned long size;
ret = recvfrom (sock, reply + len, sizeof(reply) - len,
0, NULL, NULL);
if (ret < 0) {
save_errno = errno;
krb5_set_error_string(context, "recvfrom %s: %s",
host, strerror(save_errno));
return save_errno;
} else if (ret == 0) {
krb5_set_error_string(context, "recvfrom timeout %s", host);
return 1;
}
len += ret;
if (len < 4)
continue;
_krb5_get_int(reply, &size, 4);
if (size + 4 < len)
continue;
memmove(reply, reply + 4, size);
len = size;
break;
}
if (len == sizeof(reply)) {
krb5_set_error_string(context, "message too large from %s",
host);
return ENOMEM;
}
} else {
ret = recvfrom (sock, reply, sizeof(reply), 0, NULL, NULL);
if (ret < 0) {
save_errno = errno;
krb5_set_error_string(context, "recvfrom %s: %s",
host, strerror(save_errno));
return save_errno;
}
len = ret;
}
if (len < 6) {
str2data (result_string, "server %s sent to too short message "
"(%ld bytes)", host, (long)len);
*result_code = KRB5_KPASSWD_MALFORMED;
return 0;
}
pkt_len = (reply[0] << 8) | (reply[1]);
pkt_ver = (reply[2] << 8) | (reply[3]);
if ((pkt_len != len) || (reply[1] == 0x7e || reply[1] == 0x5e)) {
KRB_ERROR error;
size_t size;
u_char *p;
memset(&error, 0, sizeof(error));
ret = decode_KRB_ERROR(reply, len, &error, &size);
if (ret)
return ret;
if (error.e_data->length < 2) {
str2data(result_string, "server %s sent too short "
"e_data to print anything usable", host);
free_KRB_ERROR(&error);
*result_code = KRB5_KPASSWD_MALFORMED;
return 0;
}
p = error.e_data->data;
*result_code = (p[0] << 8) | p[1];
if (error.e_data->length == 2)
str2data(result_string, "server only sent error code");
else
krb5_data_copy (result_string,
p + 2,
error.e_data->length - 2);
free_KRB_ERROR(&error);
return 0;
}
if (pkt_len != len) {
str2data (result_string, "client: wrong len in reply");
*result_code = KRB5_KPASSWD_MALFORMED;
return 0;
}
if (pkt_ver != KRB5_KPASSWD_VERS_CHANGEPW) {
str2data (result_string,
"client: wrong version number (%d)", pkt_ver);
*result_code = KRB5_KPASSWD_MALFORMED;
return 0;
}
ap_rep_data.data = reply + 6;
ap_rep_data.length = (reply[4] << 8) | (reply[5]);
if (reply + len < (u_char *)ap_rep_data.data + ap_rep_data.length) {
str2data (result_string, "client: wrong AP len in reply");
*result_code = KRB5_KPASSWD_MALFORMED;
return 0;
}
if (ap_rep_data.length) {
krb5_ap_rep_enc_part *ap_rep;
krb5_data priv_data;
u_char *p;
priv_data.data = (u_char*)ap_rep_data.data + ap_rep_data.length;
priv_data.length = len - ap_rep_data.length - 6;
ret = krb5_rd_rep (context,
auth_context,
&ap_rep_data,
&ap_rep);
if (ret)
return ret;
krb5_free_ap_rep_enc_part (context, ap_rep);
ret = krb5_rd_priv (context,
auth_context,
&priv_data,
result_code_string,
NULL);
if (ret) {
krb5_data_free (result_code_string);
return ret;
}
if (result_code_string->length < 2) {
*result_code = KRB5_KPASSWD_MALFORMED;
str2data (result_string,
"client: bad length in result");
return 0;
}
p = result_code_string->data;
*result_code = (p[0] << 8) | p[1];
krb5_data_copy (result_string,
(unsigned char*)result_code_string->data + 2,
result_code_string->length - 2);
return 0;
} else {
KRB_ERROR error;
size_t size;
u_char *p;
ret = decode_KRB_ERROR(reply + 6, len - 6, &error, &size);
if (ret) {
return ret;
}
if (error.e_data->length < 2) {
krb5_warnx (context, "too short e_data to print anything usable");
return 1; /* XXX */
}
p = error.e_data->data;
*result_code = (p[0] << 8) | p[1];
krb5_data_copy (result_string,
p + 2,
error.e_data->length - 2);
return 0;
}
}
