/*
* Double any quote characters present in a quoted field.
*/
static char *
qquote(struct flavor *fl, const char *s)
{
const char *sp;
struct k5buf buf;
k5_buf_init_dynamic(&buf);
for (sp = s; *sp != '\0'; sp++) {
k5_buf_add_len(&buf, sp, 1);
if (*sp == fl->quotechar)
k5_buf_add_len(&buf, sp, 1);
}
return buf.data;
}
krb5_error_code
krb5_ldap_parse_principal_name(char *i_princ_name, char **o_princ_name)
{
const char *at_rlm_name, *p;
struct k5buf buf;
at_rlm_name = strrchr(i_princ_name, '@');
if (!at_rlm_name) {
*o_princ_name = strdup(i_princ_name);
if (!*o_princ_name)
return ENOMEM;
} else {
k5_buf_init_dynamic(&buf);
for (p = i_princ_name; p < at_rlm_name; p++) {
if (*p == '@')
k5_buf_add(&buf, "\\");
k5_buf_add_len(&buf, p, 1);
}
k5_buf_add(&buf, at_rlm_name);
*o_princ_name = k5_buf_data(&buf);
if (!*o_princ_name)
return ENOMEM;
}
return 0;
}
static void
buf_add_printable_len(struct k5buf *buf, const char *p, size_t len)
{
char text[5];
size_t i;
if (buf_is_printable(p, len)) {
k5_buf_add_len(buf, p, len);
} else {
for (i = 0; i < len; i++) {
if (buf_is_printable(p + i, 1)) {
k5_buf_add_len(buf, p + i, 1);
} else {
snprintf(text, sizeof(text), "\\x%02x",
(unsigned)(p[i] & 0xff));
k5_buf_add_len(buf, text, 4);
}
}
}
}
static krb5_error_code
make_proxy_request(struct conn_state *state, const krb5_data *realm,
const krb5_data *message, char **req_out, size_t *len_out)
{
krb5_kkdcp_message pm;
krb5_data *encoded_pm = NULL;
struct k5buf buf;
const char *uri_path;
krb5_error_code ret;
*req_out = NULL;
*len_out = 0;
/*
* Stuff the message length in at the front of the kerb_message field
* before encoding. The proxied messages are actually the payload we'd
* be sending and receiving if we were using plain TCP.
*/
memset(&pm, 0, sizeof(pm));
ret = alloc_data(&pm.kerb_message, message->length + 4);
if (ret != 0)
goto cleanup;
store_32_be(message->length, pm.kerb_message.data);
memcpy(pm.kerb_message.data + 4, message->data, message->length);
pm.target_domain = *realm;
ret = encode_krb5_kkdcp_message(&pm, &encoded_pm);
if (ret != 0)
goto cleanup;
/* Build the request to transmit: the headers + the proxy message. */
k5_buf_init_dynamic(&buf);
uri_path = (state->http.uri_path != NULL) ? state->http.uri_path : "";
k5_buf_add_fmt(&buf, "POST /%s HTTP/1.0\r\n", uri_path);
k5_buf_add(&buf, "Cache-Control: no-cache\r\n");
k5_buf_add(&buf, "Pragma: no-cache\r\n");
k5_buf_add(&buf, "User-Agent: kerberos/1.0\r\n");
k5_buf_add(&buf, "Content-type: application/kerberos\r\n");
k5_buf_add_fmt(&buf, "Content-Length: %d\r\n\r\n", encoded_pm->length);
k5_buf_add_len(&buf, encoded_pm->data, encoded_pm->length);
if (k5_buf_status(&buf) != 0) {
ret = ENOMEM;
goto cleanup;
}
*req_out = buf.data;
*len_out = buf.len;
cleanup:
krb5_free_data_contents(NULL, &pm.kerb_message);
krb5_free_data(NULL, encoded_pm);
return ret;
}
/* Load four bytes from the cache file and return their value as a 32-bit
* unsigned integer according to the file format. Also append them to buf. */
static krb5_error_code
read32(krb5_context context, krb5_ccache id, struct k5buf *buf, uint32_t *out)
{
krb5_error_code ret;
char bytes[4];
k5_cc_mutex_assert_locked(context, &((fcc_data *)id->data)->lock);
ret = read_bytes(context, id, bytes, 4);
if (ret)
return ret;
if (buf != NULL)
k5_buf_add_len(buf, bytes, 4);
*out = (version(id) < 3) ? load_32_n(bytes) : load_32_be(bytes);
return 0;
}
/* Return a copy of in, quoting all characters which are special in an LDAP
* filter (RFC 4515) or DN string (RFC 4514). Return NULL on failure. */
char *
ldap_filter_correct (char *in)
{
size_t count;
const char special[] = "*()\\ #\"+,;<>";
struct k5buf buf;
k5_buf_init_dynamic(&buf);
while (TRUE) {
count = strcspn(in, special);
k5_buf_add_len(&buf, in, count);
in += count;
if (*in == '\0')
break;
k5_buf_add_fmt(&buf, "\\%2x", (unsigned char)*in++);
}
return buf.data;
}
static char *
trace_format(krb5_context context, const char *fmt, va_list ap)
{
struct k5buf buf;
krb5_error_code kerr;
size_t len, i;
int err;
struct conn_state *cs;
const krb5_data *d;
krb5_data data;
char addrbuf[NI_MAXHOST], portbuf[NI_MAXSERV], tmpbuf[200], *str;
const char *p;
krb5_const_principal princ;
const krb5_keyblock *keyblock;
krb5_key key;
const krb5_checksum *cksum;
krb5_pa_data **padata;
krb5_ccache ccache;
krb5_keytab keytab;
krb5_creds *creds;
krb5_enctype *etypes, etype;
k5_buf_init_dynamic(&buf);
while (TRUE) {
/* Advance to the next word in braces. */
len = strcspn(fmt, "{");
k5_buf_add_len(&buf, fmt, len);
if (fmt[len] == '\0')
break;
fmt += len + 1;
len = strcspn(fmt, "}");
if (fmt[len] == '\0' || len > sizeof(tmpbuf) - 1)
break;
memcpy(tmpbuf, fmt, len);
tmpbuf[len] = '\0';
fmt += len + 1;
/* Process the format word. */
if (strcmp(tmpbuf, "int") == 0) {
k5_buf_add_fmt(&buf, "%d", va_arg(ap, int));
} else if (strcmp(tmpbuf, "long") == 0) {
static krb5_error_code
krb5_rc_io_store(krb5_context context, struct dfl_data *t,
krb5_donot_replay *rep)
{
size_t clientlen, serverlen;
unsigned int len;
krb5_error_code ret;
struct k5buf buf, extbuf;
char *extstr;
clientlen = strlen(rep->client);
serverlen = strlen(rep->server);
if (rep->msghash) {
/*
* Write a hash extension record, to be followed by a record
* in regular format (without the message hash) for the
* benefit of old implementations.
*/
/* Format the extension value so we know its length. */
k5_buf_init_dynamic(&extbuf);
k5_buf_add_fmt(&extbuf, "HASH:%s %lu:%s %lu:%s", rep->msghash,
(unsigned long)clientlen, rep->client,
(unsigned long)serverlen, rep->server);
if (k5_buf_status(&extbuf) != 0)
return KRB5_RC_MALLOC;
extstr = extbuf.data;
/*
* Put the extension value into the server field of a
* regular-format record, with an empty client field.
*/
k5_buf_init_dynamic(&buf);
len = 1;
k5_buf_add_len(&buf, (char *)&len, sizeof(len));
k5_buf_add_len(&buf, "", 1);
len = strlen(extstr) + 1;
k5_buf_add_len(&buf, (char *)&len, sizeof(len));
k5_buf_add_len(&buf, extstr, len);
k5_buf_add_len(&buf, (char *)&rep->cusec, sizeof(rep->cusec));
k5_buf_add_len(&buf, (char *)&rep->ctime, sizeof(rep->ctime));
free(extstr);
} else /* No extension record needed. */
k5_buf_init_dynamic(&buf);
len = clientlen + 1;
k5_buf_add_len(&buf, (char *)&len, sizeof(len));
k5_buf_add_len(&buf, rep->client, len);
len = serverlen + 1;
k5_buf_add_len(&buf, (char *)&len, sizeof(len));
k5_buf_add_len(&buf, rep->server, len);
k5_buf_add_len(&buf, (char *)&rep->cusec, sizeof(rep->cusec));
k5_buf_add_len(&buf, (char *)&rep->ctime, sizeof(rep->ctime));
if (k5_buf_status(&buf) != 0)
return KRB5_RC_MALLOC;
ret = krb5_rc_io_write(context, &t->d, buf.data, buf.len);
k5_buf_free(&buf);
return ret;
}
