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Split TCG SWID Request attribute into chunks if needed

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This commit is contained in:
Andreas Steffen
2014-05-31 20:37:56 +02:00
parent bee82725eb
commit 34cd3e102e
4 changed files with 28 additions and 7 deletions
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src/libpts/plugins/imv_swid/imv_swid_agent.c
+21 -1
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@@ -467,6 +467,7 @@ METHOD(imv_agent_if_t, batch_ending, TNC_Result,
char result_str[BUF_LEN], *error_str = "", *command;
char *target, *separator;
int tag_id_count, tag_count, i;
size_t max_attr_size, attr_size, entry_size;
chunk_t tag_creator, unique_sw_id;
json_object *jrequest, *jresponse, *jvalue;
tcg_swid_attr_req_t *cast_attr;
@@ -535,9 +536,15 @@ METHOD(imv_agent_if_t, batch_ending, TNC_Result,
json_object_put(jresponse);
break;
}
/* Compute the maximum TCG SWID Request attribute size */
max_attr_size = state->get_max_msg_len(state) -
PA_TNC_HEADER_SIZE;
/* Create the [first] TCG SWID Request attribute */
attr_size = PA_TNC_ATTR_HEADER_SIZE + TCG_SWID_REQ_MIN_SIZE;
attr = tcg_swid_attr_req_create(TCG_SWID_ATTR_REQ_FLAG_NONE,
swid_state->get_request_id(swid_state), 0);
cast_attr = (tcg_swid_attr_req_t*)attr;
tag_id_count = json_object_array_length(jresponse);
DBG1(DBG_IMV, "%d SWID tag targets", tag_id_count);
@@ -569,6 +576,19 @@ METHOD(imv_agent_if_t, batch_ending, TNC_Result,
tag_creator.len - 1);
tag_id = swid_tag_id_create(tag_creator, unique_sw_id,
chunk_empty);
entry_size = 2 + tag_creator.len + 2 + unique_sw_id.len;
/* Have we reached the maximum attribute size? */
if (attr_size + entry_size > max_attr_size)
{
out_msg->add_attribute(out_msg, attr);
attr_size = PA_TNC_ATTR_HEADER_SIZE +
TCG_SWID_REQ_MIN_SIZE;
attr = tcg_swid_attr_req_create(
TCG_SWID_ATTR_REQ_FLAG_NONE,
swid_state->get_request_id(swid_state), 0);
}
cast_attr = (tcg_swid_attr_req_t*)attr;
cast_attr->add_target(cast_attr, tag_id);
}
json_object_put(jresponse);