ocsp.c

mediastreamer2是开源的网络传输媒体流的库

		}
	if(acbio)
		BIO_printf(bio_err, "Waiting for OCSP client connections...\n");

	redo_accept:

	if (acbio)
		{
		if (!do_responder(&req, &cbio, acbio, port))
			goto end;
		if (!req)
			{
			resp = OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
			send_ocsp_response(cbio, resp);
			goto done_resp;
			}
		}

	if (!req && (signfile || reqout || host || add_nonce || ridx_filename))
		{
		BIO_printf(bio_err, "Need an OCSP request for this operation!\n");
		goto end;
		}

	if (req && add_nonce) OCSP_request_add1_nonce(req, NULL, -1);

	if (signfile)
		{
		if (!keyfile) keyfile = signfile;
		signer = load_cert(bio_err, signfile, FORMAT_PEM,
			NULL, e, "signer certificate");
		if (!signer)
			{
			BIO_printf(bio_err, "Error loading signer certificate\n");
			goto end;
			}
		if (sign_certfile)
			{
			sign_other = load_certs(bio_err, sign_certfile, FORMAT_PEM,
				NULL, e, "signer certificates");
			if (!sign_other) goto end;
			}
		key = load_key(bio_err, keyfile, FORMAT_PEM, 0, NULL, NULL,
			"signer private key");
		if (!key)
			goto end;
		if (!OCSP_request_sign(req, signer, key, EVP_sha1(), sign_other, sign_flags))
			{
			BIO_printf(bio_err, "Error signing OCSP request\n");
			goto end;
			}
		}

	if (req_text && req) OCSP_REQUEST_print(out, req, 0);

	if (reqout)
		{
		derbio = BIO_new_file(reqout, "wb");
		if(!derbio)
			{
			BIO_printf(bio_err, "Error opening file %s\n", reqout);
			goto end;
			}
		i2d_OCSP_REQUEST_bio(derbio, req);
		BIO_free(derbio);
		}

	if (ridx_filename && (!rkey || !rsigner || !rca_cert))
		{
		BIO_printf(bio_err, "Need a responder certificate, key and CA for this operation!\n");
		goto end;
		}

	if (ridx_filename && !rdb)
		{
		rdb = load_index(ridx_filename, NULL);
		if (!rdb) goto end;
		if (!index_index(rdb)) goto end;
		}

	if (rdb)
		{
		i = make_ocsp_response(&resp, req, rdb, rca_cert, rsigner, rkey, rother, rflags, nmin, ndays);
		if (cbio)
			send_ocsp_response(cbio, resp);
		}
	else if (host)
		{
#ifndef OPENSSL_NO_SOCK
		cbio = BIO_new_connect(host);
#else
		BIO_printf(bio_err, "Error creating connect BIO - sockets not supported.\n");
		goto end;
#endif
		if (!cbio)
			{
			BIO_printf(bio_err, "Error creating connect BIO\n");
			goto end;
			}
		if (port) BIO_set_conn_port(cbio, port);
		if (use_ssl == 1)
			{
			BIO *sbio;
#if !defined(OPENSSL_NO_SSL2) && !defined(OPENSSL_NO_SSL3)
			ctx = SSL_CTX_new(SSLv23_client_method());
#elif !defined(OPENSSL_NO_SSL3)
			ctx = SSL_CTX_new(SSLv3_client_method());
#elif !defined(OPENSSL_NO_SSL2)
			ctx = SSL_CTX_new(SSLv2_client_method());
#else
			BIO_printf(bio_err, "SSL is disabled\n");
			goto end;
#endif
			SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
			sbio = BIO_new_ssl(ctx, 1);
			cbio = BIO_push(sbio, cbio);
			}
		if (BIO_do_connect(cbio) <= 0)
			{
			BIO_printf(bio_err, "Error connecting BIO\n");
			goto end;
			}
		resp = OCSP_sendreq_bio(cbio, path, req);
		BIO_free_all(cbio);
		cbio = NULL;
		if (!resp)
			{
			BIO_printf(bio_err, "Error querying OCSP responsder\n");
			goto end;
			}
		}
	else if (respin)
		{
		derbio = BIO_new_file(respin, "rb");
		if (!derbio)
			{
			BIO_printf(bio_err, "Error Opening OCSP response file\n");
			goto end;
			}
		resp = d2i_OCSP_RESPONSE_bio(derbio, NULL);
		BIO_free(derbio);
		if(!resp)
			{
			BIO_printf(bio_err, "Error reading OCSP response\n");
			goto end;
			}
	
		}
	else
		{
		ret = 0;
		goto end;
		}

	done_resp:

	if (respout)
		{
		derbio = BIO_new_file(respout, "wb");
		if(!derbio)
			{
			BIO_printf(bio_err, "Error opening file %s\n", respout);
			goto end;
			}
		i2d_OCSP_RESPONSE_bio(derbio, resp);
		BIO_free(derbio);
		}

	i = OCSP_response_status(resp);

	if (i != OCSP_RESPONSE_STATUS_SUCCESSFUL)
		{
		BIO_printf(out, "Responder Error: %s (%d)\n",
				OCSP_response_status_str(i), i);
		if (ignore_err)
			goto redo_accept;
		ret = 0;
		goto end;
		}

	if (resp_text) OCSP_RESPONSE_print(out, resp, 0);

	/* If running as responder don't verify our own response */
	if (cbio)
		{
		if (accept_count > 0)
			accept_count--;
		/* Redo if more connections needed */
		if (accept_count)
			{
			BIO_free_all(cbio);
			cbio = NULL;
			OCSP_REQUEST_free(req);
			req = NULL;
			OCSP_RESPONSE_free(resp);
			resp = NULL;
			goto redo_accept;
			}
		goto end;
		}

	if (!store)
		store = setup_verify(bio_err, CAfile, CApath);
	if (!store)
		goto end;
	if (verify_certfile)
		{
		verify_other = load_certs(bio_err, verify_certfile, FORMAT_PEM,
			NULL, e, "validator certificate");
		if (!verify_other) goto end;
		}

	bs = OCSP_response_get1_basic(resp);

	if (!bs)
		{
		BIO_printf(bio_err, "Error parsing response\n");
		goto end;
		}

	if (!noverify)
		{
		if (req && ((i = OCSP_check_nonce(req, bs)) <= 0))
			{
			if (i == -1)
				BIO_printf(bio_err, "WARNING: no nonce in response\n");
			else
				{
				BIO_printf(bio_err, "Nonce Verify error\n");
				goto end;
				}
			}

		i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
                if (i < 0) i = OCSP_basic_verify(bs, NULL, store, 0);

		if(i <= 0)
			{
			BIO_printf(bio_err, "Response Verify Failure\n");
			ERR_print_errors(bio_err);
			}
		else
			BIO_printf(bio_err, "Response verify OK\n");

		}

	if (!print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage))
		goto end;

	ret = 0;

end:
	ERR_print_errors(bio_err);
	X509_free(signer);
	X509_STORE_free(store);
	EVP_PKEY_free(key);
	EVP_PKEY_free(rkey);
	X509_free(issuer);
	X509_free(cert);
	X509_free(rsigner);
	X509_free(rca_cert);
	free_index(rdb);
	BIO_free_all(cbio);
	BIO_free_all(acbio);
	BIO_free(out);
	OCSP_REQUEST_free(req);
	OCSP_RESPONSE_free(resp);
	OCSP_BASICRESP_free(bs);
	sk_free(reqnames);
	sk_OCSP_CERTID_free(ids);
	sk_X509_pop_free(sign_other, X509_free);
	sk_X509_pop_free(verify_other, X509_free);

	if (use_ssl != -1)
		{
		OPENSSL_free(host);
		OPENSSL_free(port);
		OPENSSL_free(path);
		SSL_CTX_free(ctx);
		}

	OPENSSL_EXIT(ret);
}

static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert, X509 *issuer,
				STACK_OF(OCSP_CERTID) *ids)
	{
	OCSP_CERTID *id;
	if(!issuer)
		{
		BIO_printf(bio_err, "No issuer certificate specified\n");
		return 0;
		}
	if(!*req) *req = OCSP_REQUEST_new();
	if(!*req) goto err;
	id = OCSP_cert_to_id(NULL, cert, issuer);
	if(!id || !sk_OCSP_CERTID_push(ids, id)) goto err;
	if(!OCSP_request_add0_id(*req, id)) goto err;
	return 1;

	err:
	BIO_printf(bio_err, "Error Creating OCSP request\n");
	return 0;
	}

static int add_ocsp_serial(OCSP_REQUEST **req, char *serial, X509 *issuer,
				STACK_OF(OCSP_CERTID) *ids)
	{
	OCSP_CERTID *id;
	X509_NAME *iname;
	ASN1_BIT_STRING *ikey;
	ASN1_INTEGER *sno;
	if(!issuer)
		{
		BIO_printf(bio_err, "No issuer certificate specified\n");
		return 0;
		}
	if(!*req) *req = OCSP_REQUEST_new();
	if(!*req) goto err;
	iname = X509_get_subject_name(issuer);
	ikey = X509_get0_pubkey_bitstr(issuer);
	sno = s2i_ASN1_INTEGER(NULL, serial);
	if(!sno)
		{
		BIO_printf(bio_err, "Error converting serial number %s\n", serial);
		return 0;
		}
	id = OCSP_cert_id_new(EVP_sha1(), iname, ikey, sno);
	ASN1_INTEGER_free(sno);
	if(!id || !sk_OCSP_CERTID_push(ids, id)) goto err;
	if(!OCSP_request_add0_id(*req, id)) goto err;
	return 1;

	err:
	BIO_printf(bio_err, "Error Creating OCSP request\n");
	return 0;
	}

static int print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
					STACK *names, STACK_OF(OCSP_CERTID) *ids,
					long nsec, long maxage)
	{
	OCSP_CERTID *id;
	char *name;
	int i;

	int status, reason;

	ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;

	if (!bs || !req || !sk_num(names) || !sk_OCSP_CERTID_num(ids))
		return 1;

	for (i = 0; i < sk_OCSP_CERTID_num(ids); i++)
		{
		id = sk_OCSP_CERTID_value(ids, i);
		name = sk_value(names, i);
		BIO_printf(out, "%s: ", name);

		if(!OCSP_resp_find_status(bs, id, &status, &reason,
					&rev, &thisupd, &nextupd))
			{
			BIO_puts(out, "ERROR: No Status found.\n");
			continue;
			}

		/* Check validity: if invalid write to output BIO so we
		 * know which response this refers to.
		 */
		if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage))
			{
			BIO_puts(out, "WARNING: Status times invalid.\n");
			ERR_print_errors(out);
			}
		BIO_printf(out, "%s\n", OCSP_cert_status_str(status));

		BIO_puts(out, "\tThis Update: ");
		ASN1_GENERALIZEDTIME_print(out, thisupd);
		BIO_puts(out, "\n");

		if(nextupd)
			{
			BIO_puts(out, "\tNext Update: ");
			ASN1_GENERALIZEDTIME_print(out, nextupd);
			BIO_puts(out, "\n");
			}

		if (status != V_OCSP_CERTSTATUS_REVOKED)
			continue;

		if (reason != -1)
			BIO_printf(out, "\tReason: %s\n",
				OCSP_crl_reason_str(reason));

		BIO_puts(out, "\tRevocation Time: ");
		ASN1_GENERALIZEDTIME_print(out, rev);
		BIO_puts(out, "\n");
		}

	return 1;
	}


static int make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req, CA_DB *db,
			X509 *ca, X509 *rcert, EVP_PKEY *rkey,
			STACK_OF(X509) *rother, unsigned long flags,
			int nmin, int ndays)
	{
	ASN1_TIME *thisupd = NULL, *nextupd = NULL;
	OCSP_CERTID *cid, *ca_id = NULL;
	OCSP_BASICRESP *bs = NULL;
	int i, id_count, ret = 1;


	id_count = OCSP_request_onereq_count(req);

	if (id_count <= 0)
		{
		*resp = OCSP_response_create(OCSP_RESPONSE_STATUS_MALFORMEDREQUEST, NULL);
		goto end;
		}

	ca_id = OCSP_cert_to_id(EVP_sha1(), NULL, ca);

	bs = OCSP_BASICRESP_new();
	thisupd = X509_gmtime_adj(NULL, 0);
	if (ndays != -1)
		nextupd = X509_gmtime_adj(NULL, nmin * 60 + ndays * 3600 * 24 );

	/* Examine each certificate id in the request */
	for (i = 0; i < id_count; i++)
		{
		OCSP_ONEREQ *one;
		ASN1_INTEGER *serial;
		char **inf;
		one = OCSP_request_onereq_get0(req, i);
		cid = OCSP_onereq_get0_id(one);
		/* Is this request about our CA? */
		if (OCSP_id_issuer_cmp(ca_id, cid))
			{
			OCSP_basic_add1_status(bs, cid,
						V_OCSP_CERTSTATUS_UNKNOWN,
						0, NULL,
						thisupd, nextupd);
			continue;
			}
		OCSP_id_get0_info(NULL, NULL, NULL, &serial, cid);
		inf = lookup_serial(db, serial);
		if (!inf)
			OCSP_basic_add1_status(bs, cid,
						V_OCSP_CERTSTATUS_UNKNOWN,
						0, NULL,
						thisupd, nextupd);
		else if (inf[DB_type][0] == DB_TYPE_VAL)
			OCSP_basic_add1_status(bs, cid,
						V_OCSP_CERTSTATUS_GOOD,
						0, NULL,
						thisupd, nextupd);
		else if (inf[DB_type][0] == DB_TYPE_REV)
			{
			ASN1_OBJECT *inst = NULL;
			ASN1_TIME *revtm = NULL;
			ASN1_GENERALIZEDTIME *invtm = NULL;
			OCSP_SINGLERESP *single;
			int reason = -1;
			unpack_revinfo(&revtm, &reason, &inst, &invtm, inf[DB_rev_date]);
			single = OCSP_basic_add1_status(bs, cid,
						V_OCSP_CERTSTATUS_REVOKED,
						reason, revtm,
						thisupd, nextupd);
			if (invtm)
				OCSP_SINGLERESP_add1_ext_i2d(single, NID_invalidity_date, invtm, 0, 0);
			else if (inst)
				OCSP_SINGLERESP_add1_ext_i2d(single, NID_hold_instruction_code, inst, 0, 0);
			ASN1_OBJECT_free(inst);
			ASN1_TIME_free(revtm);
			ASN1_GENERALIZEDTIME_free(invtm);
			}
		}

	OCSP_copy_nonce(bs, req);
		
	OCSP_basic_sign(bs, rcert, rkey, EVP_sha1(), rother, flags);

	*resp = OCSP_response_create(OCSP_RESPONSE_STATUS_SUCCESSFUL, bs);

	end:
	ASN1_TIME_free(thisupd);
	ASN1_TIME_free(nextupd);
	OCSP_CERTID_free(ca_id);
	OCSP_BASICRESP_free(bs);
	return ret;

	}

static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser)
	{
	int i;
	BIGNUM *bn = NULL;
	char *itmp, *row[DB_NUMBER],**rrow;
	for (i = 0; i < DB_NUMBER; i++) row[i] = NULL;
	bn = ASN1_INTEGER_to_BN(ser,NULL);
	if (BN_is_zero(bn))
		itmp = BUF_strdup("00");
	else
		itmp = BN_bn2hex(bn);
	row[DB_serial] = itmp;
	BN_free(bn);
	rrow=TXT_DB_get_by_index(db->db,DB_serial,row);
	OPENSSL_free(itmp);
	return rrow;
	}

/* Quick and dirty OCSP server: read in and parse input request */

static BIO *init_responder(char *port)
	{
	BIO *acbio = NULL, *bufbio = NULL;
	bufbio = BIO_new(BIO_f_buffer());
	if (!bufbio) 
		goto err;
#ifndef OPENSSL_NO_SOCK
	acbio = BIO_new_accept(port);
#else
	BIO_printf(bio_err, "Error setting up accept BIO - sockets not supported.\n");
#endif
	if (!acbio)
		goto err;
	BIO_set_accept_bios(acbio, bufbio);
	bufbio = NULL;

	if (BIO_do_accept(acbio) <= 0)
		{
			BIO_printf(bio_err, "Error setting up accept BIO\n");
			ERR_print_errors(bio_err);
			goto err;
		}

	return acbio;

	err:
	BIO_free_all(acbio);
	BIO_free(bufbio);
	return NULL;
	}

static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio, char *port)
	{
	int have_post = 0, len;
	OCSP_REQUEST *req = NULL;
	char inbuf[1024];
	BIO *cbio = NULL;

	if (BIO_do_accept(acbio) <= 0)
		{
			BIO_printf(bio_err, "Error accepting connection\n");
			ERR_print_errors(bio_err);
			return 0;
		}

	cbio = BIO_pop(acbio);
	*pcbio = cbio;

	for(;;)
		{
		len = BIO_gets(cbio, inbuf, sizeof inbuf);
		if (len <= 0)
			return 1;
		/* Look for "POST" signalling start of query */
		if (!have_post)
			{
			if(strncmp(inbuf, "POST", 4))
				{
				BIO_printf(bio_err, "Invalid request\n");
				return 1;
				}
			have_post = 1;
			}
		/* Look for end of headers */
		if ((inbuf[0] == '\r') || (inbuf[0] == '\n'))
			break;
		}

	/* Try to read OCSP request */

	req = d2i_OCSP_REQUEST_bio(cbio, NULL);

	if (!req)
		{
		BIO_printf(bio_err, "Error parsing OCSP request\n");
		ERR_print_errors(bio_err);
		}

	*preq = req;

	return 1;

	}

static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp)
	{
	char http_resp[] = 
		"HTTP/1.0 200 OK\r\nContent-type: application/ocsp-response\r\n"
		"Content-Length: %d\r\n\r\n";
	if (!cbio)
		return 0;
	BIO_printf(cbio, http_resp, i2d_OCSP_RESPONSE(resp, NULL));
	i2d_OCSP_RESPONSE_bio(cbio, resp);
	BIO_flush(cbio);
	return 1;
	}

#endif