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6786c70ec112ac11b31ff19bb9e52a70ba0b5220
openssl/apps/ocsp.c
Rich Salz 4ce5ed5f39 RT3682: Avoid double-free on OCSP parse error 
Found by Kurt Cancemi

(Manual cherry-pick of f8e427154bbc0c33f29fa7aad001b1b655e5995b)
Reviewed-by: Matt Caswell <matt@openssl.org>
2015-06-23 08:14:24 -04:00

1368 lines
44 KiB
C
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/* ocsp.c */
/*
* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
* 2000.
*/
/* ====================================================================
* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#ifndef OPENSSL_NO_OCSP
# ifdef OPENSSL_SYS_VMS
# define _XOPEN_SOURCE_EXTENDED/* So fd_set and friends get properly defined
* on OpenVMS */
# endif
# define USE_SOCKETS
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include <time.h>
# include "apps.h" /* needs to be included before the openssl
* headers! */
# include <openssl/e_os2.h>
# include <openssl/crypto.h>
# include <openssl/err.h>
# include <openssl/ssl.h>
# include <openssl/evp.h>
# include <openssl/bn.h>
# include <openssl/x509v3.h>
# if defined(NETWARE_CLIB)
# ifdef NETWARE_BSDSOCK
# include <sys/socket.h>
# include <sys/bsdskt.h>
# else
# include <novsock2.h>
# endif
# elif defined(NETWARE_LIBC)
# ifdef NETWARE_BSDSOCK
# include <sys/select.h>
# else
# include <novsock2.h>
# endif
# endif
/* Maximum leeway in validity period: default 5 minutes */
# define MAX_VALIDITY_PERIOD (5 * 60)
static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
const EVP_MD *cert_id_md, X509 *issuer,
STACK_OF(OCSP_CERTID) *ids);
static int add_ocsp_serial(OCSP_REQUEST **req, char *serial,
const EVP_MD *cert_id_md, X509 *issuer,
STACK_OF(OCSP_CERTID) *ids);
static int print_ocsp_summary(BIO *out, OCSP_BASICRESP *bs, OCSP_REQUEST *req,
STACK_OF(OPENSSL_STRING) *names,
STACK_OF(OCSP_CERTID) *ids, long nsec,
long maxage);
static int make_ocsp_response(OCSP_RESPONSE **resp, OCSP_REQUEST *req,
CA_DB *db, X509 *ca, X509 *rcert,
EVP_PKEY *rkey, const EVP_MD *md,
STACK_OF(X509) *rother, unsigned long flags,
int nmin, int ndays, int badsig);
static char **lookup_serial(CA_DB *db, ASN1_INTEGER *ser);
static BIO *init_responder(const char *port);
static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
const char *port);
static int send_ocsp_response(BIO *cbio, OCSP_RESPONSE *resp);
static OCSP_RESPONSE *query_responder(BIO *err, BIO *cbio, const char *path,
const STACK_OF(CONF_VALUE) *headers,
OCSP_REQUEST *req, int req_timeout);
# undef PROG
# define PROG ocsp_main
int MAIN(int, char **);
int MAIN(int argc, char **argv)
{
ENGINE *e = NULL;
char **args;
char *host = NULL, *port = NULL, *path = "/";
char *thost = NULL, *tport = NULL, *tpath = NULL;
char *reqin = NULL, *respin = NULL;
char *reqout = NULL, *respout = NULL;
char *signfile = NULL, *keyfile = NULL;
char *rsignfile = NULL, *rkeyfile = NULL;
char *outfile = NULL;
int add_nonce = 1, noverify = 0, use_ssl = -1;
STACK_OF(CONF_VALUE) *headers = NULL;
OCSP_REQUEST *req = NULL;
OCSP_RESPONSE *resp = NULL;
OCSP_BASICRESP *bs = NULL;
X509 *issuer = NULL, *cert = NULL;
X509 *signer = NULL, *rsigner = NULL;
EVP_PKEY *key = NULL, *rkey = NULL;
BIO *acbio = NULL, *cbio = NULL;
BIO *derbio = NULL;
BIO *out = NULL;
int req_timeout = -1;
int req_text = 0, resp_text = 0;
long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
char *CAfile = NULL, *CApath = NULL;
X509_STORE *store = NULL;
X509_VERIFY_PARAM *vpm = NULL;
STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
int ret = 1;
int accept_count = -1;
int badarg = 0;
int badsig = 0;
int i;
int ignore_err = 0;
STACK_OF(OPENSSL_STRING) *reqnames = NULL;
STACK_OF(OCSP_CERTID) *ids = NULL;
X509 *rca_cert = NULL;
char *ridx_filename = NULL;
char *rca_filename = NULL;
CA_DB *rdb = NULL;
int nmin = 0, ndays = -1;
const EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
if (bio_err == NULL)
bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);
if (!load_config(bio_err, NULL))
goto end;
SSL_load_error_strings();
OpenSSL_add_ssl_algorithms();
args = argv + 1;
reqnames = sk_OPENSSL_STRING_new_null();
ids = sk_OCSP_CERTID_new_null();
while (!badarg && *args && *args[0] == '-') {
if (!strcmp(*args, "-out")) {
if (args[1]) {
args++;
outfile = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-timeout")) {
if (args[1]) {
args++;
req_timeout = atol(*args);
if (req_timeout < 0) {
BIO_printf(bio_err, "Illegal timeout value %s\n", *args);
badarg = 1;
}
} else
badarg = 1;
} else if (!strcmp(*args, "-url")) {
if (thost)
OPENSSL_free(thost);
if (tport)
OPENSSL_free(tport);
if (tpath)
OPENSSL_free(tpath);
thost = tport = tpath = NULL;
if (args[1]) {
args++;
if (!OCSP_parse_url(*args, &host, &port, &path, &use_ssl)) {
BIO_printf(bio_err, "Error parsing URL\n");
badarg = 1;
}
thost = host;
tport = port;
tpath = path;
} else
badarg = 1;
} else if (!strcmp(*args, "-host")) {
if (args[1]) {
args++;
host = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-port")) {
if (args[1]) {
args++;
port = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-header")) {
if (args[1] && args[2]) {
if (!X509V3_add_value(args[1], args[2], &headers))
goto end;
args += 2;
} else
badarg = 1;
} else if (!strcmp(*args, "-ignore_err"))
ignore_err = 1;
else if (!strcmp(*args, "-noverify"))
noverify = 1;
else if (!strcmp(*args, "-nonce"))
add_nonce = 2;
else if (!strcmp(*args, "-no_nonce"))
add_nonce = 0;
else if (!strcmp(*args, "-resp_no_certs"))
rflags |= OCSP_NOCERTS;
else if (!strcmp(*args, "-resp_key_id"))
rflags |= OCSP_RESPID_KEY;
else if (!strcmp(*args, "-no_certs"))
sign_flags |= OCSP_NOCERTS;
else if (!strcmp(*args, "-no_signature_verify"))
verify_flags |= OCSP_NOSIGS;
else if (!strcmp(*args, "-no_cert_verify"))
verify_flags |= OCSP_NOVERIFY;
else if (!strcmp(*args, "-no_chain"))
verify_flags |= OCSP_NOCHAIN;
else if (!strcmp(*args, "-no_cert_checks"))
verify_flags |= OCSP_NOCHECKS;
else if (!strcmp(*args, "-no_explicit"))
verify_flags |= OCSP_NOEXPLICIT;
else if (!strcmp(*args, "-trust_other"))
verify_flags |= OCSP_TRUSTOTHER;
else if (!strcmp(*args, "-no_intern"))
verify_flags |= OCSP_NOINTERN;
else if (!strcmp(*args, "-badsig"))
badsig = 1;
else if (!strcmp(*args, "-text")) {
req_text = 1;
resp_text = 1;
} else if (!strcmp(*args, "-req_text"))
req_text = 1;
else if (!strcmp(*args, "-resp_text"))
resp_text = 1;
else if (!strcmp(*args, "-reqin")) {
if (args[1]) {
args++;
reqin = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-respin")) {
if (args[1]) {
args++;
respin = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-signer")) {
if (args[1]) {
args++;
signfile = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-VAfile")) {
if (args[1]) {
args++;
verify_certfile = *args;
verify_flags |= OCSP_TRUSTOTHER;
} else
badarg = 1;
} else if (!strcmp(*args, "-sign_other")) {
if (args[1]) {
args++;
sign_certfile = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-verify_other")) {
if (args[1]) {
args++;
verify_certfile = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-CAfile")) {
if (args[1]) {
args++;
CAfile = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-CApath")) {
if (args[1]) {
args++;
CApath = *args;
} else
badarg = 1;
} else if (args_verify(&args, NULL, &badarg, bio_err, &vpm)) {
if (badarg)
goto end;
continue;
} else if (!strcmp(*args, "-validity_period")) {
if (args[1]) {
args++;
nsec = atol(*args);
if (nsec < 0) {
BIO_printf(bio_err,
"Illegal validity period %s\n", *args);
badarg = 1;
}
} else
badarg = 1;
} else if (!strcmp(*args, "-status_age")) {
if (args[1]) {
args++;
maxage = atol(*args);
if (maxage < 0) {
BIO_printf(bio_err, "Illegal validity age %s\n", *args);
badarg = 1;
}
} else
badarg = 1;
} else if (!strcmp(*args, "-signkey")) {
if (args[1]) {
args++;
keyfile = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-reqout")) {
if (args[1]) {
args++;
reqout = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-respout")) {
if (args[1]) {
args++;
respout = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-path")) {
if (args[1]) {
args++;
path = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-issuer")) {
if (args[1]) {
args++;
X509_free(issuer);
issuer = load_cert(bio_err, *args, FORMAT_PEM,
NULL, e, "issuer certificate");
if (!issuer)
goto end;
} else
badarg = 1;
} else if (!strcmp(*args, "-cert")) {
if (args[1]) {
args++;
X509_free(cert);
cert = load_cert(bio_err, *args, FORMAT_PEM,
NULL, e, "certificate");
if (!cert)
goto end;
if (!cert_id_md)
cert_id_md = EVP_sha1();
if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
goto end;
if (!sk_OPENSSL_STRING_push(reqnames, *args))
goto end;
} else
badarg = 1;
} else if (!strcmp(*args, "-serial")) {
if (args[1]) {
args++;
if (!cert_id_md)
cert_id_md = EVP_sha1();
if (!add_ocsp_serial(&req, *args, cert_id_md, issuer, ids))
goto end;
if (!sk_OPENSSL_STRING_push(reqnames, *args))
goto end;
} else
badarg = 1;
} else if (!strcmp(*args, "-index")) {
if (args[1]) {
args++;
ridx_filename = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-CA")) {
if (args[1]) {
args++;
rca_filename = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-nmin")) {
if (args[1]) {
args++;
nmin = atol(*args);
if (nmin < 0) {
BIO_printf(bio_err, "Illegal update period %s\n", *args);
badarg = 1;
}
}
if (ndays == -1)
ndays = 0;
else
badarg = 1;
} else if (!strcmp(*args, "-nrequest")) {
if (args[1]) {
args++;
accept_count = atol(*args);
if (accept_count < 0) {
BIO_printf(bio_err, "Illegal accept count %s\n", *args);
badarg = 1;
}
} else
badarg = 1;
} else if (!strcmp(*args, "-ndays")) {
if (args[1]) {
args++;
ndays = atol(*args);
if (ndays < 0) {
BIO_printf(bio_err, "Illegal update period %s\n", *args);
badarg = 1;
}
} else
badarg = 1;
} else if (!strcmp(*args, "-rsigner")) {
if (args[1]) {
args++;
rsignfile = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-rkey")) {
if (args[1]) {
args++;
rkeyfile = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-rother")) {
if (args[1]) {
args++;
rcertfile = *args;
} else
badarg = 1;
} else if (!strcmp(*args, "-rmd")) {
if (args[1]) {
args++;
rsign_md = EVP_get_digestbyname(*args);
if (!rsign_md)
badarg = 1;
} else
badarg = 1;
} else if ((cert_id_md = EVP_get_digestbyname((*args) + 1)) == NULL) {
badarg = 1;
}
args++;
}
/* Have we anything to do? */
if (!req && !reqin && !respin && !(port && ridx_filename))
badarg = 1;
if (badarg) {
BIO_printf(bio_err, "OCSP utility\n");
BIO_printf(bio_err, "Usage ocsp [options]\n");
BIO_printf(bio_err, "where options are\n");
BIO_printf(bio_err, "-out file output filename\n");
BIO_printf(bio_err, "-issuer file issuer certificate\n");
BIO_printf(bio_err, "-cert file certificate to check\n");
BIO_printf(bio_err, "-serial n serial number to check\n");
BIO_printf(bio_err,
"-signer file certificate to sign OCSP request with\n");
BIO_printf(bio_err,
"-signkey file private key to sign OCSP request with\n");
BIO_printf(bio_err,
"-sign_other file additional certificates to include in signed request\n");
BIO_printf(bio_err,
"-no_certs don't include any certificates in signed request\n");
BIO_printf(bio_err,
"-req_text print text form of request\n");
BIO_printf(bio_err,
"-resp_text print text form of response\n");
BIO_printf(bio_err,
"-text print text form of request and response\n");
BIO_printf(bio_err,
"-reqout file write DER encoded OCSP request to \"file\"\n");
BIO_printf(bio_err,
"-respout file write DER encoded OCSP reponse to \"file\"\n");
BIO_printf(bio_err,
"-reqin file read DER encoded OCSP request from \"file\"\n");
BIO_printf(bio_err,
"-respin file read DER encoded OCSP reponse from \"file\"\n");
BIO_printf(bio_err,
"-nonce add OCSP nonce to request\n");
BIO_printf(bio_err,
"-no_nonce don't add OCSP nonce to request\n");
BIO_printf(bio_err, "-url URL OCSP responder URL\n");
BIO_printf(bio_err,
"-host host:n send OCSP request to host on port n\n");
BIO_printf(bio_err,
"-path path to use in OCSP request\n");
BIO_printf(bio_err,
"-CApath dir trusted certificates directory\n");
BIO_printf(bio_err,
"-CAfile file trusted certificates file\n");
BIO_printf(bio_err,
"-no_alt_chains only ever use the first certificate chain found\n");
BIO_printf(bio_err,
"-VAfile file validator certificates file\n");
BIO_printf(bio_err,
"-validity_period n maximum validity discrepancy in seconds\n");
BIO_printf(bio_err,
"-status_age n maximum status age in seconds\n");
BIO_printf(bio_err,
"-noverify don't verify response at all\n");
BIO_printf(bio_err,
"-verify_other file additional certificates to search for signer\n");
BIO_printf(bio_err,
"-trust_other don't verify additional certificates\n");
BIO_printf(bio_err,
"-no_intern don't search certificates contained in response for signer\n");
BIO_printf(bio_err,
"-no_signature_verify don't check signature on response\n");
BIO_printf(bio_err,
"-no_cert_verify don't check signing certificate\n");
BIO_printf(bio_err,
"-no_chain don't chain verify response\n");
BIO_printf(bio_err,
"-no_cert_checks don't do additional checks on signing certificate\n");
BIO_printf(bio_err,
"-port num port to run responder on\n");
BIO_printf(bio_err,
"-index file certificate status index file\n");
BIO_printf(bio_err, "-CA file CA certificate\n");
BIO_printf(bio_err,
"-rsigner file responder certificate to sign responses with\n");
BIO_printf(bio_err,
"-rkey file responder key to sign responses with\n");
BIO_printf(bio_err,
"-rother file other certificates to include in response\n");
BIO_printf(bio_err,
"-resp_no_certs don't include any certificates in response\n");
BIO_printf(bio_err,
"-nmin n number of minutes before next update\n");
BIO_printf(bio_err,
"-ndays n number of days before next update\n");
BIO_printf(bio_err,
"-resp_key_id identify reponse by signing certificate key ID\n");
BIO_printf(bio_err,
"-nrequest n number of requests to accept (default unlimited)\n");
BIO_printf(bio_err,
"-<dgst alg> use specified digest in the request\n");
BIO_printf(bio_err,
"-timeout n timeout connection to OCSP responder after n seconds\n");
goto end;
}
if (outfile)
out = BIO_new_file(outfile, "w");
else
out = BIO_new_fp(stdout, BIO_NOCLOSE);
if (!out) {
BIO_printf(bio_err, "Error opening output file\n");
goto end;
}
if (!req && (add_nonce != 2))
add_nonce = 0;
if (!req && reqin) {
if (!strcmp(reqin, "-"))
derbio = BIO_new_fp(stdin, BIO_NOCLOSE);
else
derbio = BIO_new_file(reqin, "rb");
if (!derbio) {
BIO_printf(bio_err, "Error Opening OCSP request file\n");
goto end;
}
req = d2i_OCSP_REQUEST_bio(derbio, NULL);
BIO_free(derbio);
if (!req) {
BIO_printf(bio_err, "Error reading OCSP request\n");
goto end;
}
}
if (!req && port) {
acbio = init_responder(port);
if (!acbio)
goto end;
}
if (rsignfile && !rdb) {
if (!rkeyfile)
rkeyfile = rsignfile;
rsigner = load_cert(bio_err, rsignfile, FORMAT_PEM,
NULL, e, "responder certificate");
if (!rsigner) {
BIO_printf(bio_err, "Error loading responder certificate\n");
goto end;
}
rca_cert = load_cert(bio_err, rca_filename, FORMAT_PEM,
NULL, e, "CA certificate");
if (rcertfile) {
rother = load_certs(bio_err, rcertfile, FORMAT_PEM,
NULL, e, "responder other certificates");
if (!rother)
goto end;
}
rkey = load_key(bio_err, rkeyfile, FORMAT_PEM, 0, NULL, NULL,
"responder private key");
if (!rkey)
goto end;
}
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, NULL, 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) {
if (!strcmp(reqout, "-"))
derbio = BIO_new_fp(stdout, BIO_NOCLOSE);
else
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,
rsign_md, rother, rflags, nmin, ndays, badsig);
if (cbio)
send_ocsp_response(cbio, resp);
} else if (host) {
# ifndef OPENSSL_NO_SOCK
resp = process_responder(bio_err, req, host, path,
port, use_ssl, headers, req_timeout);
if (!resp)
goto end;
# else
BIO_printf(bio_err,
"Error creating connect BIO - sockets not supported.\n");
goto end;
# endif
} else if (respin) {
if (!strcmp(respin, "-"))
derbio = BIO_new_fp(stdin, BIO_NOCLOSE);
else
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) {
if (!strcmp(respout, "-"))
derbio = BIO_new_fp(stdout, BIO_NOCLOSE);
else
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;
}
ret = 0;
goto end;
} else if (ridx_filename) {
ret = 0;
goto end;
}
if (!store)
store = setup_verify(bio_err, CAfile, CApath);
if (!store)
goto end;
if (vpm)
X509_STORE_set1_param(store, vpm);
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;
}
ret = 0;
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");
ret = 1;
goto end;
}
}
i = OCSP_basic_verify(bs, verify_other, store, verify_flags);
if (i <= 0) {
BIO_printf(bio_err, "Response Verify Failure\n");
ERR_print_errors(bio_err);
ret = 1;
} else
BIO_printf(bio_err, "Response verify OK\n");
}
if (!print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage))
ret = 1;
end:
ERR_print_errors(bio_err);
X509_free(signer);
X509_STORE_free(store);
if (vpm)
X509_VERIFY_PARAM_free(vpm);
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_OPENSSL_STRING_free(reqnames);
sk_OCSP_CERTID_free(ids);
sk_X509_pop_free(sign_other, X509_free);
sk_X509_pop_free(verify_other, X509_free);
sk_CONF_VALUE_pop_free(headers, X509V3_conf_free);
if (thost)
OPENSSL_free(thost);
if (tport)
OPENSSL_free(tport);
if (tpath)
OPENSSL_free(tpath);
OPENSSL_EXIT(ret);
}
static int add_ocsp_cert(OCSP_REQUEST **req, X509 *cert,
const EVP_MD *cert_id_md, 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(cert_id_md, 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,
const EVP_MD *cert_id_md, 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(cert_id_md, 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_OF(OPENSSL_STRING) *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_OPENSSL_STRING_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_OPENSSL_STRING_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, const EVP_MD *rmd,
STACK_OF(X509) *rother, unsigned long flags,
int nmin, int ndays, int badsig)
{
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;
}
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;
ASN1_OBJECT *cert_id_md_oid;
const EVP_MD *cert_id_md;
one = OCSP_request_onereq_get0(req, i);
cid = OCSP_onereq_get0_id(one);
OCSP_id_get0_info(NULL, &cert_id_md_oid, NULL, NULL, cid);
cert_id_md = EVP_get_digestbyobj(cert_id_md_oid);
if (!cert_id_md) {
*resp = OCSP_response_create(OCSP_RESPONSE_STATUS_INTERNALERROR,
NULL);
goto end;
}
if (ca_id)
OCSP_CERTID_free(ca_id);
ca_id = OCSP_cert_to_id(cert_id_md, NULL, ca);
/* 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, rmd, rother, flags);
if (badsig)
bs->signature->data[bs->signature->length - 1] ^= 0x1;
*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);
OPENSSL_assert(bn); /* FIXME: should report an error at this
* point and abort */
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(const 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,
const 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);
(void)BIO_flush(cbio);
return 1;
}
static OCSP_RESPONSE *query_responder(BIO *err, BIO *cbio, const char *path,
const STACK_OF(CONF_VALUE) *headers,
OCSP_REQUEST *req, int req_timeout)
{
int fd;
int rv;
int i;
OCSP_REQ_CTX *ctx = NULL;
OCSP_RESPONSE *rsp = NULL;
fd_set confds;
struct timeval tv;
if (req_timeout != -1)
BIO_set_nbio(cbio, 1);
rv = BIO_do_connect(cbio);
if ((rv <= 0) && ((req_timeout == -1) || !BIO_should_retry(cbio))) {
BIO_puts(err, "Error connecting BIO\n");
return NULL;
}
if (BIO_get_fd(cbio, &fd) <= 0) {
BIO_puts(err, "Can't get connection fd\n");
goto err;
}
if (req_timeout != -1 && rv <= 0) {
FD_ZERO(&confds);
openssl_fdset(fd, &confds);
tv.tv_usec = 0;
tv.tv_sec = req_timeout;
rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
if (rv == 0) {
BIO_puts(err, "Timeout on connect\n");
return NULL;
}
}
ctx = OCSP_sendreq_new(cbio, path, NULL, -1);
if (!ctx)
return NULL;
for (i = 0; i < sk_CONF_VALUE_num(headers); i++) {
CONF_VALUE *hdr = sk_CONF_VALUE_value(headers, i);
if (!OCSP_REQ_CTX_add1_header(ctx, hdr->name, hdr->value))
goto err;
}
if (!OCSP_REQ_CTX_set1_req(ctx, req))
goto err;
for (;;) {
rv = OCSP_sendreq_nbio(&rsp, ctx);
if (rv != -1)
break;
if (req_timeout == -1)
continue;
FD_ZERO(&confds);
openssl_fdset(fd, &confds);
tv.tv_usec = 0;
tv.tv_sec = req_timeout;
if (BIO_should_read(cbio))
rv = select(fd + 1, (void *)&confds, NULL, NULL, &tv);
else if (BIO_should_write(cbio))
rv = select(fd + 1, NULL, (void *)&confds, NULL, &tv);
else {
BIO_puts(err, "Unexpected retry condition\n");
goto err;
}
if (rv == 0) {
BIO_puts(err, "Timeout on request\n");
break;
}
if (rv == -1) {
BIO_puts(err, "Select error\n");
break;
}
}
err:
if (ctx)
OCSP_REQ_CTX_free(ctx);
return rsp;
}
OCSP_RESPONSE *process_responder(BIO *err, OCSP_REQUEST *req,
const char *host, const char *path,
const char *port, int use_ssl,
const STACK_OF(CONF_VALUE) *headers,
int req_timeout)
{
BIO *cbio = NULL;
SSL_CTX *ctx = NULL;
OCSP_RESPONSE *resp = NULL;
cbio = BIO_new_connect(host);
if (!cbio) {
BIO_printf(err, "Error creating connect BIO\n");
goto end;
}
if (port)
BIO_set_conn_port(cbio, port);
if (use_ssl == 1) {
BIO *sbio;
ctx = SSL_CTX_new(SSLv23_client_method());
if (ctx == NULL) {
BIO_printf(err, "Error creating SSL context.\n");
goto end;
}
SSL_CTX_set_mode(ctx, SSL_MODE_AUTO_RETRY);
sbio = BIO_new_ssl(ctx, 1);
cbio = BIO_push(sbio, cbio);
}
resp = query_responder(err, cbio, path, headers, req, req_timeout);
if (!resp)
BIO_printf(bio_err, "Error querying OCSP responder\n");
end:
if (cbio)
BIO_free_all(cbio);
if (ctx)
SSL_CTX_free(ctx);
return resp;
}
#endif
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