521 lines
19 KiB
C
521 lines
19 KiB
C
#include "tpm.h"
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#include "facilities.h"
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#include <itss-security/SecurityRequest.h>
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#include <itss-security/SecurityReply.h>
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#include <it2s-tender/time.h>
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#include <itss-transport/TransportRequest.h>
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#include <it2s-tender/space.h>
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#include <it2s-tender/geodesy.h>
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#include <stdint.h>
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#include <string.h>
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int tpm_is_inside_zone(void* fc, tolling_info_s* ti) {
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int rv = 0;
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facilities_t* facilities = (facilities_t*) fc;
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double point[2];
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it2s_tender_lock_space(&facilities->epv);
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it2s_tender_get_space(&facilities->epv);
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point[0] = facilities->epv.space.latitude/1.0e7;
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point[1] = facilities->epv.space.longitude/1.0e7;
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it2s_tender_unlock_space(&facilities->epv);
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if (it2s_tender_is_inside_polygon(point, ti->zone.polygon, ti->zone.polygon_len)) {
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return 1;
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}
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return 0;
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}
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int tpm_pay(void* fc, uint8_t* neighbour) {
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int rv = 0;
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facilities_t* facilities = (facilities_t*) fc;
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tolling_s* tolling = (tolling_s*) &facilities->tolling;
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pthread_mutex_lock(&facilities->epv.time.lock);
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tolling->tz = it2s_tender_get_now(TIME_MICROSECONDS) ;
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pthread_mutex_unlock(&facilities->epv.time.lock);
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TransportRequest_t* tr = NULL;
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SecurityRequest_t* sreq = NULL;
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SecurityReply_t* srep = NULL;
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TPM_t* tpm = NULL;
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const size_t buf_len = 2048;
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uint8_t buf[buf_len];
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if (!tolling->enabled) {
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syslog_debug("[facilities] [tolling] tolling is disabled");
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goto cleanup;
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}
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tolling->active = true;
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tolling->nonce = rand();
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syslog_info("[facilities] [tolling] issuing toll payment > client: %ld | nonce: %ld", tolling->client_id, tolling->nonce);
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// TPM
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tpm = calloc(1, sizeof(TPM_t));
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tpm->header.messageID = 117;
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tpm->header.protocolVersion = 0;
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pthread_mutex_lock(&facilities->id.lock);
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tpm->header.stationID = facilities->id.station_id;
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pthread_mutex_unlock(&facilities->id.lock);
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asn_ulong2INTEGER(&tpm->tpm.timestamp, it2s_tender_get_clock(&facilities->epv));
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tpm->tpm.tollingFlow.present = TollingFlow_PR_request;
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tpm->tpm.tollingFlow.choice.request.clientId = tolling->client_id;
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tpm->tpm.tollingFlow.choice.request.paymentMethod.present = TollPaymentMethod_PR_fiat;
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tpm->tpm.tollingFlow.choice.request.paymentMethod.choice.fiat.fiatId = FiatId_eur;
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tpm->tpm.tollingFlow.choice.request.transactionNonce = tolling->nonce;
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// Encode TollingPaymentMessage
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asn_enc_rval_t enc = oer_encode_to_buffer(&asn_DEF_TollingPaymentMessage, NULL, &tpm->tpm, buf, buf_len);
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if (enc.encoded == -1) {
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syslog_err("[facilities] [tolling] error encoding TollingPaymentMessage (%s)", enc.failed_type->name);
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rv = 1;
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goto cleanup;
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}
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// Sign
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sreq = calloc(1, sizeof(SecurityRequest_t));
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sreq->present = SecurityRequest_PR_sign;
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sreq->choice.sign.data.size = enc.encoded;
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sreq->choice.sign.data.buf = malloc(enc.encoded);
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memcpy(sreq->choice.sign.data.buf, buf, enc.encoded);
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buf[0] = 4;
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enc = oer_encode_to_buffer(&asn_DEF_SecurityRequest, NULL, sreq, buf+1, 2047);
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syslog_debug("[facilities]->[security] SecurityRequest.sign (%ldB)", enc.encoded+1);
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zmq_send(tolling->security_socket, buf, enc.encoded+1, 0);
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int32_t rl = zmq_recv(tolling->security_socket, buf, buf_len, 0);
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syslog_debug("[facilities]<-[security] SecurityReply.sign (%dB)", rl);
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if (oer_decode(NULL, &asn_DEF_SecurityReply, (void**) &srep, buf, rl).code) {
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syslog_err("[facilities] SecurityReply.sign decode failure");
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rv = 1;
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goto cleanup;
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}
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if (srep->returnCode == SecurityReplyReturnCode_rejected) {
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syslog_err("[facilities] SecurityReply.sign rejected");
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rv = 1;
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goto cleanup;
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}
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tpm->signature.r.size = srep->data->choice.sign.r.size;
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tpm->signature.r.buf = malloc(srep->data->choice.sign.r.size);
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memcpy(tpm->signature.r.buf, srep->data->choice.sign.r.buf, srep->data->choice.sign.r.size);
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tpm->signature.s.size = srep->data->choice.sign.s.size;
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tpm->signature.s.buf = malloc(srep->data->choice.sign.s.size);
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memcpy(tpm->signature.s.buf, srep->data->choice.sign.s.buf, srep->data->choice.sign.s.size);
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tpm->signature.signer.size = srep->data->choice.sign.signer.size;
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tpm->signature.signer.buf = malloc(srep->data->choice.sign.signer.size);
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memcpy(tpm->signature.signer.buf, srep->data->choice.sign.signer.buf, srep->data->choice.sign.signer.size);
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tpm->signature.type = srep->data->choice.sign.type;
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// Encode TPM
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enc = uper_encode_to_buffer(&asn_DEF_TPM, NULL, tpm, buf, buf_len);
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if (enc.encoded == -1) {
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syslog_err("[facilities] [tolling] error encoding TPM.request (%s)", enc.failed_type->name);
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rv = 1;
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goto cleanup;
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}
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size_t tpm_uper_len = (enc.encoded + 7) / 8;
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// [transport] request (TR)
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tr = calloc(1, sizeof(TransportRequest_t));
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tr->present = TransportRequest_PR_packet;
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tr->choice.packet.present = TransportPacketRequest_PR_btp;
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BTPPacketRequest_t* bpr = &tr->choice.packet.choice.btp;
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bpr->gn.securityProfile.encrypt = true;
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bpr->gn.securityProfile.sign = true;
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bpr->gn.securityNeighbour = calloc(1, sizeof(OCTET_STRING_t));
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bpr->gn.securityNeighbour->size = 8;
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bpr->gn.securityNeighbour->buf = malloc(8);
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memcpy(bpr->gn.securityNeighbour->buf, neighbour, 8);
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bpr->data.size = tpm_uper_len;
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bpr->data.buf = malloc(tpm_uper_len);
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memcpy(bpr->data.buf, buf, tpm_uper_len);
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bpr->destinationPort = 7011;
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bpr->btpType = BTPType_btpB;
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bpr->gn.destinationAddress.buf = malloc(6);
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for (int i = 0; i < 6; ++i) {
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bpr->gn.destinationAddress.buf[i] = 0xff;
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}
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bpr->gn.destinationAddress.size = 6;
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bpr->gn.trafficClass = 2;
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bpr->gn.packetTransportType = PacketTransportType_shb;
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// encode TR
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buf[0] = 4;
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enc = oer_encode_to_buffer(&asn_DEF_TransportRequest, NULL, tr, buf+1, buf_len-1);
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if (enc.encoded == -1) {
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syslog_err("[facilities] [tolling] error encoding TR TPM.request (%s)", enc.failed_type->name);
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rv = 1;
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goto cleanup;
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}
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queue_send(facilities->tx_queue, buf, enc.encoded+1, 3);
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cleanup:
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ASN_STRUCT_FREE(asn_DEF_TPM, tpm);
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ASN_STRUCT_FREE(asn_DEF_TransportRequest, tr);
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ASN_STRUCT_FREE(asn_DEF_SecurityRequest, sreq);
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ASN_STRUCT_FREE(asn_DEF_SecurityReply, srep);
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return rv;
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}
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static void rsu_handle_recv(facilities_t* facilities, TPM_t* tpm_rx, uint8_t* neighbour) {
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TollRequest_t* req = &tpm_rx->tpm.tollingFlow.choice.request;
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syslog_info("[facilities] [tolling] received toll payment > client: %ld (certificate id: %02x%02x%02x) | nonce: %ld",
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req->clientId,
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neighbour ? neighbour[5] : 0,
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neighbour ? neighbour[6] : 0,
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neighbour ? neighbour[7] : 0,
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req->transactionNonce
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);
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const size_t buf_len = 2048;
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uint8_t buf[buf_len];
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TransportRequest_t* tr = NULL;
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SecurityRequest_t* sreq = NULL;
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SecurityReply_t* srep = NULL;
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TPM_t* tpm = NULL;
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// Encode TollingPaymentMessage
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asn_enc_rval_t enc = oer_encode_to_buffer(&asn_DEF_TollingPaymentMessage, NULL, &tpm_rx->tpm, buf, buf_len);
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if (enc.encoded == -1) {
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syslog_err("[facilities] [tolling] error encoding TollingPaymentMessage (%s)", enc.failed_type->name);
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goto cleanup;
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}
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// Verify
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sreq = calloc(1, sizeof(SecurityRequest_t));
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sreq->present = SecurityRequest_PR_verify;
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// message
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sreq->choice.verify.message.size = enc.encoded;
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sreq->choice.verify.message.buf = malloc(enc.encoded);
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memcpy(sreq->choice.verify.message.buf, buf, enc.encoded);
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// r
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sreq->choice.verify.r.size = tpm_rx->signature.r.size;
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sreq->choice.verify.r.buf = malloc(tpm_rx->signature.r.size);
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memcpy(sreq->choice.verify.r.buf, tpm_rx->signature.r.buf, tpm_rx->signature.r.size);
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// s
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sreq->choice.verify.s.size = tpm_rx->signature.s.size;
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sreq->choice.verify.s.buf = malloc(tpm_rx->signature.s.size);
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memcpy(sreq->choice.verify.s.buf, tpm_rx->signature.s.buf, tpm_rx->signature.s.size);
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// signer
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sreq->choice.verify.signer.size = tpm_rx->signature.signer.size;
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sreq->choice.verify.signer.buf = malloc(tpm_rx->signature.signer.size);
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memcpy(sreq->choice.verify.signer.buf, tpm_rx->signature.signer.buf, tpm_rx->signature.signer.size);
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// signature type
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sreq->choice.verify.type = tpm_rx->signature.type;
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buf[0] = 4;
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enc = oer_encode_to_buffer(&asn_DEF_SecurityRequest, NULL, sreq, buf+1, 2047);
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syslog_debug("[facilities]->[security] SecurityRequest.verify (%ldB)", enc.encoded+1);
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zmq_send(facilities->tolling.security_socket, buf, enc.encoded+1, 0);
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int32_t rl = zmq_recv(facilities->tolling.security_socket, buf, buf_len, 0);
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syslog_debug("[facilities]<-[security] SecurityReply.verify (%dB)", rl);
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if (oer_decode(NULL, &asn_DEF_SecurityReply, (void**) &srep, buf, rl).code) {
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syslog_err("[facilities] SecurityReply.verify decode failure");
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goto cleanup;
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}
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if (srep->returnCode == SecurityReplyReturnCode_rejected) {
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syslog_err("[facilities] SecurityReply.verify rejected");
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goto cleanup;
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}
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if (srep->data->choice.verify.report != SecurityVerifyConfirmCode_success) {
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syslog_debug("[facilities] signature verify failed");
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goto cleanup;
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}
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ASN_STRUCT_FREE(asn_DEF_SecurityRequest, sreq);
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ASN_STRUCT_FREE(asn_DEF_SecurityReply, srep);
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sreq = NULL;
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srep = NULL;
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// TPM
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tpm = calloc(1, sizeof(TPM_t));
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tpm->header.messageID = 117;
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tpm->header.protocolVersion = 0;
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pthread_mutex_lock(&facilities->id.lock);
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tpm->header.stationID = facilities->id.station_id;
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pthread_mutex_unlock(&facilities->id.lock);
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asn_ulong2INTEGER(&tpm->tpm.timestamp, it2s_tender_get_clock(&facilities->epv));
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tpm->tpm.tollingFlow.present = TollingFlow_PR_reply;
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tpm->tpm.tollingFlow.choice.reply.clientId = req->clientId;
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tpm->tpm.tollingFlow.choice.reply.transactionNonce = req->transactionNonce;
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// TODO check clientId
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// TODO dlt: check transaction
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// Encode TollingPaymentMessage
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enc = oer_encode_to_buffer(&asn_DEF_TollingPaymentMessage, NULL, &tpm->tpm, buf, buf_len);
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if (enc.encoded == -1) {
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syslog_err("[facilities] [tolling] error encoding TollingPaymentMessage (%s)", enc.failed_type->name);
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goto cleanup;
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}
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// Sign
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sreq = calloc(1, sizeof(SecurityRequest_t));
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sreq->present = SecurityRequest_PR_sign;
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sreq->choice.sign.data.size = enc.encoded;
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sreq->choice.sign.data.buf = malloc(enc.encoded);
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memcpy(sreq->choice.sign.data.buf, buf, enc.encoded);
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buf[0] = 4;
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enc = oer_encode_to_buffer(&asn_DEF_SecurityRequest, NULL, sreq, buf+1, 2047);
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syslog_debug("[facilities]->[security] SecurityRequest.sign (%ldB)", enc.encoded+1);
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zmq_send(facilities->tolling.security_socket, buf, enc.encoded+1, 0);
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rl = zmq_recv(facilities->tolling.security_socket, buf, buf_len, 0);
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syslog_debug("[facilities]<-[security] SecurityReply.sign (%dB)", rl);
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if (oer_decode(NULL, &asn_DEF_SecurityReply, (void**) &srep, buf, rl).code) {
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syslog_err("[facilities] SecurityReply.sign decode failure");
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goto cleanup;
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}
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if (srep->returnCode == SecurityReplyReturnCode_rejected) {
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syslog_err("[facilities] SecurityReply.sign rejected");
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goto cleanup;
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}
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tpm->signature.r.size = srep->data->choice.sign.r.size;
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tpm->signature.r.buf = malloc(srep->data->choice.sign.r.size);
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memcpy(tpm->signature.r.buf, srep->data->choice.sign.r.buf, srep->data->choice.sign.r.size);
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tpm->signature.s.size = srep->data->choice.sign.s.size;
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tpm->signature.s.buf = malloc(srep->data->choice.sign.s.size);
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memcpy(tpm->signature.s.buf, srep->data->choice.sign.s.buf, srep->data->choice.sign.s.size);
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tpm->signature.signer.size = srep->data->choice.sign.signer.size;
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tpm->signature.signer.buf = malloc(srep->data->choice.sign.signer.size);
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memcpy(tpm->signature.signer.buf, srep->data->choice.sign.signer.buf, srep->data->choice.sign.signer.size);
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tpm->signature.type = srep->data->choice.sign.type;
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// encode TPM
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enc = uper_encode_to_buffer(&asn_DEF_TPM, NULL, tpm, buf, buf_len);
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if (enc.encoded == -1) {
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syslog_err("[facilities] [tolling] error encoding TPM.reply (%s)", enc.failed_type->name);
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goto cleanup;
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}
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size_t tpm_uper_len = (enc.encoded + 7) / 8;
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// [transport] request (TR)
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tr = calloc(1, sizeof(TransportRequest_t));
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tr->present = TransportRequest_PR_packet;
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tr->choice.packet.present = TransportPacketRequest_PR_btp;
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BTPPacketRequest_t* bpr = &tr->choice.packet.choice.btp;
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bpr->gn.securityProfile.encrypt = true;
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bpr->gn.securityProfile.sign = true;
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bpr->data.size = tpm_uper_len;
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bpr->data.buf = malloc(tpm_uper_len);
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memcpy(bpr->data.buf, buf, tpm_uper_len);
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bpr->destinationPort = 7011;
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bpr->btpType = BTPType_btpB;
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bpr->gn.destinationAddress.buf = malloc(6);
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for (int i = 0; i < 6; ++i) {
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bpr->gn.destinationAddress.buf[i] = 0xff;
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}
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bpr->gn.destinationAddress.size = 6;
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bpr->gn.trafficClass = 2;
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bpr->gn.packetTransportType = PacketTransportType_shb;
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if (neighbour) { /* neighbour ID for [security] encryption */
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bpr->gn.securityNeighbour = calloc(1, sizeof(OCTET_STRING_t));
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bpr->gn.securityNeighbour->size = 8;
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bpr->gn.securityNeighbour->buf = malloc(8);
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memcpy(bpr->gn.securityNeighbour->buf, neighbour, 8);
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}
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// encode TR
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buf[0] = 4;
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enc = oer_encode_to_buffer(&asn_DEF_TransportRequest, NULL, tr, buf+1, buf_len-1);
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if (enc.encoded == -1) {
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syslog_err("[facilities] [tolling] error encoding TR TPM.reply (%s)", enc.failed_type->name);
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goto cleanup;
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}
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queue_send(facilities->tx_queue, buf, enc.encoded+1, 3);
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cleanup:
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ASN_STRUCT_FREE(asn_DEF_TPM, tpm);
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ASN_STRUCT_FREE(asn_DEF_TransportRequest, tr);
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ASN_STRUCT_FREE(asn_DEF_SecurityRequest, sreq);
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ASN_STRUCT_FREE(asn_DEF_SecurityReply, srep);
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}
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static void veh_handle_recv(tolling_s* tolling, TPM_t* tpm_rx, uint8_t* neighbour) {
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TollReply_t* rep = &tpm_rx->tpm.tollingFlow.choice.reply;
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if (rep->clientId != tolling->client_id) {
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syslog_debug("[facilities] [tolling]<- received TPM.reply clientId different from ego");
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return;
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}
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if (rep->transactionNonce != tolling->nonce) {
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syslog_err("[facilities] [tolling]<- received TPM.reply nonce different from sent request");
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return;
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}
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SecurityRequest_t* sreq = NULL;
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SecurityReply_t* srep = NULL;
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uint16_t buf_len = 1024;
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uint8_t buf[buf_len];
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// Encode TollingPaymentMessage
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asn_enc_rval_t enc = oer_encode_to_buffer(&asn_DEF_TollingPaymentMessage, NULL, &tpm_rx->tpm, buf, buf_len);
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if (enc.encoded == -1) {
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syslog_err("[facilities] [tolling] error encoding TollingPaymentMessage (%s)", enc.failed_type->name);
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goto cleanup;
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}
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// Verify
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sreq = calloc(1, sizeof(SecurityRequest_t));
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sreq->present = SecurityRequest_PR_verify;
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// message
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sreq->choice.verify.message.size = enc.encoded;
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sreq->choice.verify.message.buf = malloc(enc.encoded);
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memcpy(sreq->choice.verify.message.buf, buf, enc.encoded);
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// r
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sreq->choice.verify.r.size = tpm_rx->signature.r.size;
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sreq->choice.verify.r.buf = malloc(tpm_rx->signature.r.size);
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memcpy(sreq->choice.verify.r.buf, tpm_rx->signature.r.buf, tpm_rx->signature.r.size);
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// s
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sreq->choice.verify.s.size = tpm_rx->signature.s.size;
|
|
sreq->choice.verify.s.buf = malloc(tpm_rx->signature.s.size);
|
|
memcpy(sreq->choice.verify.s.buf, tpm_rx->signature.s.buf, tpm_rx->signature.s.size);
|
|
// signer
|
|
sreq->choice.verify.signer.size = tpm_rx->signature.signer.size;
|
|
sreq->choice.verify.signer.buf = malloc(tpm_rx->signature.signer.size);
|
|
memcpy(sreq->choice.verify.signer.buf, tpm_rx->signature.signer.buf, tpm_rx->signature.signer.size);
|
|
// signature type
|
|
sreq->choice.verify.type = tpm_rx->signature.type;
|
|
|
|
buf[0] = 4;
|
|
enc = oer_encode_to_buffer(&asn_DEF_SecurityRequest, NULL, sreq, buf+1, 2047);
|
|
syslog_debug("[facilities]->[security] SecurityRequest.verify (%ldB)", enc.encoded+1);
|
|
zmq_send(tolling->security_socket, buf, enc.encoded+1, 0);
|
|
int32_t rl = zmq_recv(tolling->security_socket, buf, buf_len, 0);
|
|
syslog_debug("[facilities]<-[security] SecurityReply.verify (%dB)", rl);
|
|
|
|
if (oer_decode(NULL, &asn_DEF_SecurityReply, (void**) &srep, buf, rl).code) {
|
|
syslog_err("[facilities] SecurityReply.verify decode failure");
|
|
goto cleanup;
|
|
}
|
|
|
|
if (srep->returnCode == SecurityReplyReturnCode_rejected) {
|
|
syslog_err("[facilities] SecurityReply.verify rejected");
|
|
goto cleanup;
|
|
}
|
|
|
|
if (srep->data->choice.verify.report != SecurityVerifyConfirmCode_success) {
|
|
syslog_debug("[facilities] signature verify failed");
|
|
goto cleanup;
|
|
}
|
|
|
|
syslog_info("[facilities] [tolling] received tolling payment reply > client: %ld | nonce: %ld | accepted: %s", tolling->client_id, tolling->nonce, rep->confirmationCode == TollConfirmationCode_accepted ? "yes" : "no");
|
|
|
|
tolling->active = false;
|
|
|
|
cleanup:
|
|
ASN_STRUCT_FREE(asn_DEF_SecurityRequest, sreq);
|
|
ASN_STRUCT_FREE(asn_DEF_SecurityReply, srep);
|
|
}
|
|
|
|
int tpm_recv(void* fc, TPM_t* tpm_rx, uint8_t* neighbour) {
|
|
int rv = 0;
|
|
|
|
facilities_t* facilities = (facilities_t*) fc;
|
|
tolling_s* tolling = (tolling_s*) &facilities->tolling;
|
|
|
|
if (!tolling->enabled) {
|
|
syslog_debug("[facilities] [tolling] tolling is disabled");
|
|
goto cleanup;
|
|
}
|
|
|
|
switch (tpm_rx->tpm.tollingFlow.present) {
|
|
case TollingFlow_PR_request:
|
|
if (facilities->station_type != 15) {
|
|
syslog_debug("[facilities] [tolling] received TPM.request, ignoring");
|
|
goto cleanup;
|
|
}
|
|
rsu_handle_recv(facilities, tpm_rx, neighbour);
|
|
break;
|
|
|
|
case TollingFlow_PR_reply:
|
|
if (facilities->station_type == 15) {
|
|
syslog_debug("[facilities] [tolling] received TPM.reply, ignoring");
|
|
goto cleanup;
|
|
}
|
|
pthread_mutex_lock(&facilities->epv.time.lock);
|
|
syslog_info("[facilities] [tolling] reply took %ld us", it2s_tender_get_now(TIME_MICROSECONDS) - tolling->tz);
|
|
pthread_mutex_unlock(&facilities->epv.time.lock);
|
|
veh_handle_recv(tolling, tpm_rx, neighbour);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
cleanup:
|
|
|
|
return rv;
|
|
}
|
|
|
|
int tolling_init(tolling_s* tolling, void* zmq_ctx, char* security_address) {
|
|
|
|
tolling->security_socket = zmq_socket(zmq_ctx, ZMQ_REQ);
|
|
int wait_ms = 1000;
|
|
zmq_setsockopt(tolling->security_socket, ZMQ_RCVTIMEO, &wait_ms, sizeof(int));
|
|
zmq_connect(tolling->security_socket, security_address);
|
|
|
|
return 0;
|
|
}
|
|
|
|
tolling_info_s* tolling_info_new(it2s_tender_epv_t* epv, TollingPaymentInfo_t* tpi) {
|
|
tolling_info_s* ti = calloc(1, sizeof(tolling_info_s));
|
|
|
|
ti->timestamp = it2s_tender_get_clock(epv);
|
|
ti->asn = tpi;
|
|
|
|
ti->zone.polygon_len = tpi->zone.list.count;
|
|
ti->zone.polygon = malloc(tpi->zone.list.count * sizeof(double[2]));
|
|
|
|
for (int i = 0; i < tpi->zone.list.count; ++i) {
|
|
ti->zone.polygon[i][0] = tpi->zone.list.array[i]->latitude / 1.0e7;
|
|
ti->zone.polygon[i][1] = tpi->zone.list.array[i]->longitude / 1.0e7;
|
|
}
|
|
|
|
return ti;
|
|
}
|
|
|
|
void tolling_info_free(tolling_info_s* ti) {
|
|
ASN_STRUCT_FREE(asn_DEF_TollingPaymentInfo, ti->asn);
|
|
free(ti->zone.polygon);
|
|
free(ti);
|
|
}
|