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TNC: Added preliminary code for IF-TNCCS-SOH client side support

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Process SoH Request in SoH EAP Extension method and reply with SoH TLV. The
contents of SSoH is not yet complete (i.e., some of the required attributes
are still missing). Use of SoH is disabled by default; it can be enabled
with tnc=soh in phase1 parameter for PEAP.
This commit is contained in:
Jouni Malinen 2008-04-08 16:15:56 +03:00
parent d6888f9e37
commit 0146165170
3 changed files with 159 additions and 0 deletions
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115
src/eap_peer/tncc.c
View file

@ -20,6 +20,8 @@
#include "common.h"
#include "base64.h"
#include "tncc.h"
#include "eap_common/eap_tlv_common.h"
#include "eap_common/eap_defs.h"
#ifdef UNICODE
@ -1202,3 +1204,116 @@ void tncc_deinit(struct tncc_data *tncc)
os_free(tncc);
}
static struct wpabuf * tncc_build_soh(void)
{
struct wpabuf *buf;
u8 *tlv_len, *tlv_len2, *outer_len, *inner_len, *ssoh_len, *end;
u8 correlation_id[24];
int ver = 2;
if (os_get_random(correlation_id, sizeof(correlation_id)))
return NULL;
wpa_hexdump(MSG_DEBUG, "TNC: SoH Correlation ID",
correlation_id, sizeof(correlation_id));
buf = wpabuf_alloc(200);
if (buf == NULL)
return NULL;
/* Vendor-Specific TLV (Microsoft) - SoH */
wpabuf_put_be16(buf, EAP_TLV_VENDOR_SPECIFIC_TLV); /* TLV Type */
tlv_len = wpabuf_put(buf, 2); /* Length */
wpabuf_put_be32(buf, EAP_VENDOR_MICROSOFT); /* Vendor_Id */
wpabuf_put_be16(buf, 0x01); /* TLV Type - SoH TLV */
tlv_len2 = wpabuf_put(buf, 2); /* Length */
/* SoH Header */
wpabuf_put_be16(buf, EAP_TLV_VENDOR_SPECIFIC_TLV); /* Outer Type */
outer_len = wpabuf_put(buf, 2);
wpabuf_put_be32(buf, EAP_VENDOR_MICROSOFT); /* IANA SMI Code */
wpabuf_put_be16(buf, ver); /* Inner Type */
inner_len = wpabuf_put(buf, 2);
if (ver == 2) {
/* SoH Mode Sub-Header */
/* Outer Type */
wpabuf_put_be16(buf, EAP_TLV_VENDOR_SPECIFIC_TLV);
wpabuf_put_be16(buf, 4 + 24 + 1 + 1); /* Length */
wpabuf_put_be32(buf, EAP_VENDOR_MICROSOFT); /* IANA SMI Code */
/* Value: */
wpabuf_put_data(buf, correlation_id, sizeof(correlation_id));
wpabuf_put_u8(buf, 0x01); /* Intent Flag - Request */
wpabuf_put_u8(buf, 0x00); /* Content-Type Flag */
}
/* SSoH TLV */
/* System-Health-Id */
wpabuf_put_be16(buf, 0x0002); /* Type */
wpabuf_put_be16(buf, 4); /* Length */
wpabuf_put_be32(buf, 79616);
/* Vendor-Specific Attribute */
wpabuf_put_be16(buf, EAP_TLV_VENDOR_SPECIFIC_TLV);
ssoh_len = wpabuf_put(buf, 2);
wpabuf_put_be32(buf, EAP_VENDOR_MICROSOFT); /* IANA SMI Code */
/* TODO: MS-Machine-Inventory */
/* TODO: MS-Quarantine-State */
/* MS-Packet-Info */
wpabuf_put_u8(buf, 0x03);
wpabuf_put_u8(buf, 0x11); /* r=request, vers=1 */
/* TODO: MS-MachineName */
/* MS-CorrelationId */
wpabuf_put_u8(buf, 0x06);
wpabuf_put_data(buf, correlation_id, sizeof(correlation_id));
end = wpabuf_put(buf, 0);
WPA_PUT_BE16(ssoh_len, end - ssoh_len - 2);
/* TODO: SoHReportEntry TLV (zero or more) */
/* Update length fields */
end = wpabuf_put(buf, 0);
WPA_PUT_BE16(tlv_len, end - tlv_len - 2);
WPA_PUT_BE16(tlv_len2, end - tlv_len2 - 2);
WPA_PUT_BE16(outer_len, end - outer_len - 2);
WPA_PUT_BE16(inner_len, end - inner_len - 2);
return buf;
}
struct wpabuf * tncc_process_soh_request(const u8 *data, size_t len)
{
const u8 *pos;
wpa_hexdump(MSG_DEBUG, "TNC: SoH Request", data, len);
if (len < 12)
return NULL;
/* SoH Request */
pos = data;
/* TLV Type */
if (WPA_GET_BE16(pos) != EAP_TLV_VENDOR_SPECIFIC_TLV)
return NULL;
pos += 2;
/* Length */
if (WPA_GET_BE16(pos) < 8)
return NULL;
pos += 2;
/* Vendor_Id */
if (WPA_GET_BE32(pos) != EAP_VENDOR_MICROSOFT)
return NULL;
pos += 4;
/* TLV Type */
if (WPA_GET_BE16(pos) != 0x02 /* SoH request TLV */)
return NULL;
wpa_printf(MSG_DEBUG, "TNC: SoH Request TLV received");
return tncc_build_soh();
}