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21c6c50fc8
openssl/apps/ocsp.c
Benjamin Kaduk 21c6c50fc8 GH650: Minor tidying around the ocsp app 
The ocsp utility is something of a jack-of-all-trades; most anything
related to the OCSP can be done with it.  In particular, the manual
page calls out that it can be used as either a client or a server
of the protocol, but there are also a few things that it can do
which do not quite fit into either role, such as encoding an OCSP
request but not sending it, printing out a text form of an OCSP
response (or request) from a file akin to the asn1parse utility,
or performing a lookup into the server-side revocation database
without actually sending a request or response.  All three of these
are documented as examples in the manual page, but the documentation
prior to this commit is somewhat misleading, in that when printing
the text form of an OCSP response, the code also attempts to
verify the response, displaying an error message and returning
failure if the response does not verify.  (It is possible that
the response would be able to verify with the given example, since
the default trust roots are used for that verification, but OCSP
responses frequently have alternate certification authorities
that would require passing -CAfile or -CApath for verification.)

Tidy up the documentation by passing -noverify for the case of
converting from binary to textual representation, and also
change a few instances of -respin to -reqin as appropriate, note
that the -url option provides the same functionality as the -host
and -path options, clarify that the example that saves an OCSP
response to a file will also perform verification on that response,
and fix a couple grammar nits in the manual page.

Also remove an always-true conditional for rdb != NULL -- there
are no codepaths in which it could be initialized at the time of
this check.

Signed-off-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Kurt Roeckx <kurt@openssl.org>
2016-02-13 09:12:07 -05:00

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/*
* 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 <ctype.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 void 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 void 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 *cbio, const char *host,
const char *path,
const STACK_OF(CONF_VALUE) *headers,
OCSP_REQUEST *req, int req_timeout);
typedef enum OPTION_choice {
OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
OPT_OUTFILE, OPT_TIMEOUT, OPT_URL, OPT_HOST, OPT_PORT,
OPT_IGNORE_ERR, OPT_NOVERIFY, OPT_NONCE, OPT_NO_NONCE,
OPT_RESP_NO_CERTS, OPT_RESP_KEY_ID, OPT_NO_CERTS,
OPT_NO_SIGNATURE_VERIFY, OPT_NO_CERT_VERIFY, OPT_NO_CHAIN,
OPT_NO_CERT_CHECKS, OPT_NO_EXPLICIT, OPT_TRUST_OTHER,
OPT_NO_INTERN, OPT_BADSIG, OPT_TEXT, OPT_REQ_TEXT, OPT_RESP_TEXT,
OPT_REQIN, OPT_RESPIN, OPT_SIGNER, OPT_VAFILE, OPT_SIGN_OTHER,
OPT_VERIFY_OTHER, OPT_CAFILE, OPT_CAPATH, OPT_NOCAFILE, OPT_NOCAPATH,
OPT_VALIDITY_PERIOD, OPT_STATUS_AGE, OPT_SIGNKEY, OPT_REQOUT,
OPT_RESPOUT, OPT_PATH, OPT_ISSUER, OPT_CERT, OPT_SERIAL,
OPT_INDEX, OPT_CA, OPT_NMIN, OPT_REQUEST, OPT_NDAYS, OPT_RSIGNER,
OPT_RKEY, OPT_ROTHER, OPT_RMD, OPT_HEADER,
OPT_V_ENUM,
OPT_MD
} OPTION_CHOICE;
OPTIONS ocsp_options[] = {
{"help", OPT_HELP, '-', "Display this summary"},
{"out", OPT_OUTFILE, '>', "Output filename"},
{"timeout", OPT_TIMEOUT, 'p'},
{"url", OPT_URL, 's', "Responder URL"},
{"host", OPT_HOST, 's', "host:prot top to connect to"},
{"port", OPT_PORT, 'p', "Port to run responder on"},
{"ignore_err", OPT_IGNORE_ERR, '-'},
{"noverify", OPT_NOVERIFY, '-', "Don't verify response at all"},
{"nonce", OPT_NONCE, '-', "Add OCSP nonce to request"},
{"no_nonce", OPT_NO_NONCE, '-', "Don't add OCSP nonce to request"},
{"resp_no_certs", OPT_RESP_NO_CERTS, '-',
"Don't include any certificates in response"},
{"resp_key_id", OPT_RESP_KEY_ID, '-',
"Identify reponse by signing certificate key ID"},
{"no_certs", OPT_NO_CERTS, '-',
"Don't include any certificates in signed request"},
{"no_signature_verify", OPT_NO_SIGNATURE_VERIFY, '-',
"Don't check signature on response"},
{"no_cert_verify", OPT_NO_CERT_VERIFY, '-',
"Don't check signing certificate"},
{"no_chain", OPT_NO_CHAIN, '-', "Don't chain verify response"},
{"no_cert_checks", OPT_NO_CERT_CHECKS, '-',
"Don't do additional checks on signing certificate"},
{"no_explicit", OPT_NO_EXPLICIT, '-'},
{"trust_other", OPT_TRUST_OTHER, '-',
"Don't verify additional certificates"},
{"no_intern", OPT_NO_INTERN, '-',
"Don't search certificates contained in response for signer"},
{"badsig", OPT_BADSIG, '-'},
{"text", OPT_TEXT, '-', "Print text form of request and response"},
{"req_text", OPT_REQ_TEXT, '-', "Print text form of request"},
{"resp_text", OPT_RESP_TEXT, '-', "Print text form of response"},
{"reqin", OPT_REQIN, 's', "File with the DER-encoded request"},
{"respin", OPT_RESPIN, 's', "File with the DER-encoded response"},
{"signer", OPT_SIGNER, '<', "Certificate to sign OCSP request with"},
{"VAfile", OPT_VAFILE, '<', "Validator certificates file"},
{"sign_other", OPT_SIGN_OTHER, '<',
"Additional certificates to include in signed request"},
{"verify_other", OPT_VERIFY_OTHER, '<',
"Additional certificates to search for signer"},
{"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},
{"CApath", OPT_CAPATH, '<', "Trusted certificates directory"},
{"no-CAfile", OPT_NOCAFILE, '-',
"Do not load the default certificates file"},
{"no-CApath", OPT_NOCAPATH, '-',
"Do not load certificates from the default certificates directory"},
{"validity_period", OPT_VALIDITY_PERIOD, 'u',
"Maximum validity discrepancy in seconds"},
{"status_age", OPT_STATUS_AGE, 'p', "Maximum status age in seconds"},
{"signkey", OPT_SIGNKEY, 's', "Private key to sign OCSP request with"},
{"reqout", OPT_REQOUT, 's', "Output file for the DER-encoded request"},
{"respout", OPT_RESPOUT, 's', "Output file for the DER-encoded response"},
{"path", OPT_PATH, 's', "Path to use in OCSP request"},
{"issuer", OPT_ISSUER, '<', "Issuer certificate"},
{"cert", OPT_CERT, '<', "Certificate to check"},
{"serial", OPT_SERIAL, 's', "Nerial number to check"},
{"index", OPT_INDEX, '<', "Certificate status index file"},
{"CA", OPT_CA, '<', "CA certificate"},
{"nmin", OPT_NMIN, 'p', "Number of minutes before next update"},
{"nrequest", OPT_REQUEST, 'p',
"Number of requests to accept (default unlimited)"},
{"ndays", OPT_NDAYS, 'p', "Number of days before next update"},
{"rsigner", OPT_RSIGNER, '<',
"Sesponder certificate to sign responses with"},
{"rkey", OPT_RKEY, '<', "Responder key to sign responses with"},
{"rother", OPT_ROTHER, '<', "Other certificates to include in response"},
{"rmd", OPT_RMD, 's'},
{"header", OPT_HEADER, 's', "key=value header to add"},
{"", OPT_MD, '-', "Any supported digest"},
OPT_V_OPTIONS,
{NULL}
};
int ocsp_main(int argc, char **argv)
{
BIO *acbio = NULL, *cbio = NULL, *derbio = NULL, *out = NULL;
const EVP_MD *cert_id_md = NULL, *rsign_md = NULL;
CA_DB *rdb = NULL;
EVP_PKEY *key = NULL, *rkey = NULL;
OCSP_BASICRESP *bs = NULL;
OCSP_REQUEST *req = NULL;
OCSP_RESPONSE *resp = NULL;
STACK_OF(CONF_VALUE) *headers = NULL;
STACK_OF(OCSP_CERTID) *ids = NULL;
STACK_OF(OPENSSL_STRING) *reqnames = NULL;
STACK_OF(X509) *sign_other = NULL, *verify_other = NULL, *rother = NULL;
STACK_OF(X509) *issuers = NULL;
X509 *issuer = NULL, *cert = NULL, *rca_cert = NULL;
X509 *signer = NULL, *rsigner = NULL;
X509_STORE *store = NULL;
X509_VERIFY_PARAM *vpm = NULL;
char *CAfile = NULL, *CApath = NULL, *header, *value;
char *host = NULL, *port = NULL, *path = "/", *outfile = NULL;
char *rca_filename = NULL, *reqin = NULL, *respin = NULL;
char *reqout = NULL, *respout = NULL, *ridx_filename = NULL;
char *rsignfile = NULL, *rkeyfile = NULL;
char *sign_certfile = NULL, *verify_certfile = NULL, *rcertfile = NULL;
char *signfile = NULL, *keyfile = NULL;
char *thost = NULL, *tport = NULL, *tpath = NULL;
int noCAfile = 0, noCApath = 0;
int accept_count = -1, add_nonce = 1, noverify = 0, use_ssl = -1;
int vpmtouched = 0, badsig = 0, i, ignore_err = 0, nmin = 0, ndays = -1;
int req_text = 0, resp_text = 0, req_timeout = -1, ret = 1;
long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
unsigned long sign_flags = 0, verify_flags = 0, rflags = 0;
OPTION_CHOICE o;
char *prog;
reqnames = sk_OPENSSL_STRING_new_null();
if (!reqnames)
goto end;
ids = sk_OCSP_CERTID_new_null();
if (!ids)
goto end;
if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
return 1;
prog = opt_init(argc, argv, ocsp_options);
while ((o = opt_next()) != OPT_EOF) {
switch (o) {
case OPT_EOF:
case OPT_ERR:
opthelp:
BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
goto end;
case OPT_HELP:
ret = 0;
opt_help(ocsp_options);
goto end;
case OPT_OUTFILE:
outfile = opt_arg();
break;
case OPT_TIMEOUT:
req_timeout = atoi(opt_arg());
break;
case OPT_URL:
OPENSSL_free(thost);
OPENSSL_free(tport);
OPENSSL_free(tpath);
thost = tport = tpath = NULL;
if (!OCSP_parse_url(opt_arg(), &host, &port, &path, &use_ssl)) {
BIO_printf(bio_err, "%s Error parsing URL\n", prog);
goto end;
}
thost = host;
tport = port;
tpath = path;
break;
case OPT_HOST:
host = opt_arg();
break;
case OPT_PORT:
port = opt_arg();
break;
case OPT_IGNORE_ERR:
ignore_err = 1;
break;
case OPT_NOVERIFY:
noverify = 1;
break;
case OPT_NONCE:
add_nonce = 2;
break;
case OPT_NO_NONCE:
add_nonce = 0;
break;
case OPT_RESP_NO_CERTS:
rflags |= OCSP_NOCERTS;
break;
case OPT_RESP_KEY_ID:
rflags |= OCSP_RESPID_KEY;
break;
case OPT_NO_CERTS:
sign_flags |= OCSP_NOCERTS;
break;
case OPT_NO_SIGNATURE_VERIFY:
verify_flags |= OCSP_NOSIGS;
break;
case OPT_NO_CERT_VERIFY:
verify_flags |= OCSP_NOVERIFY;
break;
case OPT_NO_CHAIN:
verify_flags |= OCSP_NOCHAIN;
break;
case OPT_NO_CERT_CHECKS:
verify_flags |= OCSP_NOCHECKS;
break;
case OPT_NO_EXPLICIT:
verify_flags |= OCSP_NOEXPLICIT;
break;
case OPT_TRUST_OTHER:
verify_flags |= OCSP_TRUSTOTHER;
break;
case OPT_NO_INTERN:
verify_flags |= OCSP_NOINTERN;
break;
case OPT_BADSIG:
badsig = 1;
break;
case OPT_TEXT:
req_text = resp_text = 1;
break;
case OPT_REQ_TEXT:
req_text = 1;
break;
case OPT_RESP_TEXT:
resp_text = 1;
break;
case OPT_REQIN:
reqin = opt_arg();
break;
case OPT_RESPIN:
respin = opt_arg();
break;
case OPT_SIGNER:
signfile = opt_arg();
break;
case OPT_VAFILE:
verify_certfile = opt_arg();
verify_flags |= OCSP_TRUSTOTHER;
break;
case OPT_SIGN_OTHER:
sign_certfile = opt_arg();
break;
case OPT_VERIFY_OTHER:
verify_certfile = opt_arg();
break;
case OPT_CAFILE:
CAfile = opt_arg();
break;
case OPT_CAPATH:
CApath = opt_arg();
break;
case OPT_NOCAFILE:
noCAfile = 1;
break;
case OPT_NOCAPATH:
noCApath = 1;
break;
case OPT_V_CASES:
if (!opt_verify(o, vpm))
goto end;
vpmtouched++;
break;
case OPT_VALIDITY_PERIOD:
opt_long(opt_arg(), &nsec);
break;
case OPT_STATUS_AGE:
opt_long(opt_arg(), &maxage);
break;
case OPT_SIGNKEY:
keyfile = opt_arg();
break;
case OPT_REQOUT:
reqout = opt_arg();
break;
case OPT_RESPOUT:
respout = opt_arg();
break;
case OPT_PATH:
path = opt_arg();
break;
case OPT_ISSUER:
issuer = load_cert(opt_arg(), FORMAT_PEM,
NULL, NULL, "issuer certificate");
if (issuer == NULL)
goto end;
if (issuers == NULL) {
if ((issuers = sk_X509_new_null()) == NULL)
goto end;
}
sk_X509_push(issuers, issuer);
break;
case OPT_CERT:
X509_free(cert);
cert = load_cert(opt_arg(), FORMAT_PEM,
NULL, NULL, "certificate");
if (cert == NULL)
goto end;
if (cert_id_md == NULL)
cert_id_md = EVP_sha1();
if (!add_ocsp_cert(&req, cert, cert_id_md, issuer, ids))
goto end;
if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
goto end;
break;
case OPT_SERIAL:
if (cert_id_md == NULL)
cert_id_md = EVP_sha1();
if (!add_ocsp_serial(&req, opt_arg(), cert_id_md, issuer, ids))
goto end;
if (!sk_OPENSSL_STRING_push(reqnames, opt_arg()))
goto end;
break;
case OPT_INDEX:
ridx_filename = opt_arg();
break;
case OPT_CA:
rca_filename = opt_arg();
break;
case OPT_NMIN:
opt_int(opt_arg(), &nmin);
if (ndays == -1)
ndays = 0;
break;
case OPT_REQUEST:
opt_int(opt_arg(), &accept_count);
break;
case OPT_NDAYS:
ndays = atoi(opt_arg());
break;
case OPT_RSIGNER:
rsignfile = opt_arg();
break;
case OPT_RKEY:
rkeyfile = opt_arg();
break;
case OPT_ROTHER:
rcertfile = opt_arg();
break;
case OPT_RMD:
if (!opt_md(opt_arg(), &rsign_md))
goto end;
break;
case OPT_HEADER:
header = opt_arg();
value = strchr(header, '=');
if (value == NULL) {
BIO_printf(bio_err, "Missing = in header key=value\n");
goto opthelp;
}
*value++ = '\0';
if (!X509V3_add_value(header, value, &headers))
goto end;
break;
case OPT_MD:
if (cert_id_md != NULL) {
BIO_printf(bio_err,
"%s: Digest must be before -cert or -serial\n",
prog);
goto opthelp;
}
if (!opt_md(opt_unknown(), &cert_id_md))
goto opthelp;
break;
}
}
argc = opt_num_rest();
argv = opt_rest();
/* Have we anything to do? */
if (!req && !reqin && !respin && !(port && ridx_filename))
goto opthelp;
out = bio_open_default(outfile, 'w', FORMAT_TEXT);
if (out == NULL)
goto end;
if (!req && (add_nonce != 2))
add_nonce = 0;
if (!req && reqin) {
derbio = bio_open_default(reqin, 'r', FORMAT_ASN1);
if (derbio == NULL)
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) {
if (!rkeyfile)
rkeyfile = rsignfile;
rsigner = load_cert(rsignfile, FORMAT_PEM,
NULL, NULL, "responder certificate");
if (!rsigner) {
BIO_printf(bio_err, "Error loading responder certificate\n");
goto end;
}
rca_cert = load_cert(rca_filename, FORMAT_PEM,
NULL, NULL, "CA certificate");
if (rcertfile) {
if (!load_certs(rcertfile, &rother, FORMAT_PEM, NULL, NULL,
"responder other certificates"))
goto end;
}
rkey = load_key(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(signfile, FORMAT_PEM,
NULL, NULL, "signer certificate");
if (!signer) {
BIO_printf(bio_err, "Error loading signer certificate\n");
goto end;
}
if (sign_certfile) {
if (!load_certs(sign_certfile, &sign_other, FORMAT_PEM, NULL, NULL,
"signer certificates"))
goto end;
}
key = load_key(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) {
derbio = bio_open_default(reqout, 'w', FORMAT_ASN1);
if (derbio == NULL)
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) {
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(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) {
derbio = bio_open_default(respin, 'r', FORMAT_ASN1);
if (derbio == NULL)
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_open_default(respout, 'w', FORMAT_ASN1);
if (derbio == NULL)
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 not unlimited, see if we took all we should. */
if (accept_count != -1 && --accept_count <= 0) {
ret = 0;
goto end;
}
BIO_free_all(cbio);
cbio = NULL;
OCSP_REQUEST_free(req);
req = NULL;
OCSP_RESPONSE_free(resp);
resp = NULL;
goto redo_accept;
}
if (ridx_filename) {
ret = 0;
goto end;
}
if (!store) {
store = setup_verify(CAfile, CApath, noCAfile, noCApath);
if (!store)
goto end;
}
if (vpmtouched)
X509_STORE_set1_param(store, vpm);
if (verify_certfile) {
if (!load_certs(verify_certfile, &verify_other, FORMAT_PEM, NULL, NULL,
"validator certificate"))
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 && issuers) {
i = OCSP_basic_verify(bs, issuers, store, OCSP_TRUSTOTHER);
if (i > 0)
ERR_clear_error();
}
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");
}
print_ocsp_summary(out, bs, req, reqnames, ids, nsec, maxage);
end:
ERR_print_errors(bio_err);
X509_free(signer);
X509_STORE_free(store);
X509_VERIFY_PARAM_free(vpm);
EVP_PKEY_free(key);
EVP_PKEY_free(rkey);
X509_free(cert);
sk_X509_pop_free(issuers, X509_free);
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);
OPENSSL_free(thost);
OPENSSL_free(tport);
OPENSSL_free(tpath);
return (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 == NULL)
*req = OCSP_REQUEST_new();
if (*req == NULL)
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 == NULL)
*req = OCSP_REQUEST_new();
if (*req == NULL)
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 == NULL || !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 void 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, status, reason;
ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
if (!bs || !req || !sk_OPENSSL_STRING_num(names)
|| !sk_OCSP_CERTID_num(ids))
return;
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");
}
}
static void 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;
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_time_adj_ex(NULL, ndays, nmin * 60, NULL);
/* 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;
}
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) {
ASN1_OCTET_STRING *sig = OCSP_resp_get0_signature(bs);
unsigned char *sigptr = ASN1_STRING_data(sig);
sigptr[ASN1_STRING_length(sig) - 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);
}
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 = OPENSSL_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;
# ifdef OPENSSL_NO_SOCK
BIO_printf(bio_err,
"Error setting up accept BIO - sockets not supported.\n");
return NULL;
# endif
bufbio = BIO_new(BIO_f_buffer());
if (bufbio == NULL)
goto err;
acbio = BIO_new(BIO_s_accept());
if (acbio == NULL
|| BIO_set_bind_mode(acbio, BIO_BIND_REUSEADDR) < 0
|| BIO_set_accept_port(acbio, port) < 0) {
BIO_printf(bio_err, "Error setting up accept BIO\n");
ERR_print_errors(bio_err);
goto err;
}
BIO_set_accept_bios(acbio, bufbio);
bufbio = NULL;
if (BIO_do_accept(acbio) <= 0) {
BIO_printf(bio_err, "Error starting accept\n");
ERR_print_errors(bio_err);
goto err;
}
return acbio;
err:
BIO_free_all(acbio);
BIO_free(bufbio);
return NULL;
}
/*
* Decode %xx URL-decoding in-place. Ignores mal-formed sequences.
*/
static int urldecode(char *p)
{
unsigned char *out = (unsigned char *)p;
unsigned char *save = out;
for (; *p; p++) {
if (*p != '%')
*out++ = *p;
else if (isxdigit(p[1]) && isxdigit(p[2])) {
*out++ = (app_hex(p[1]) << 4) | app_hex(p[2]);
p += 2;
}
else
return -1;
}
*out = '\0';
return (int)(out - save);
}
static int do_responder(OCSP_REQUEST **preq, BIO **pcbio, BIO *acbio,
const char *port)
{
int len;
OCSP_REQUEST *req = NULL;
char inbuf[2048], reqbuf[2048];
char *p, *q;
BIO *cbio = NULL, *getbio = NULL, *b64 = 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;
/* Read the request line. */
len = BIO_gets(cbio, reqbuf, sizeof reqbuf);
if (len <= 0)
return 1;
if (strncmp(reqbuf, "GET ", 4) == 0) {
/* Expecting GET {sp} /URL {sp} HTTP/1.x */
for (p = reqbuf + 4; *p == ' '; ++p)
continue;
if (*p != '/') {
BIO_printf(bio_err, "Invalid request -- bad URL\n");
return 1;
}
p++;
/* Splice off the HTTP version identifier. */
for (q = p; *q; q++)
if (*q == ' ')
break;
if (strncmp(q, " HTTP/1.", 8) != 0) {
BIO_printf(bio_err, "Invalid request -- bad HTTP vesion\n");
return 1;
}
*q = '\0';
len = urldecode(p);
if (len <= 0) {
BIO_printf(bio_err, "Invalid request -- bad URL encoding\n");
return 1;
}
if ((getbio = BIO_new_mem_buf(p, len)) == NULL
|| (b64 = BIO_new(BIO_f_base64())) == NULL) {
BIO_printf(bio_err, "Could not allocate memory\n");
ERR_print_errors(bio_err);
return 1;
}
BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
getbio = BIO_push(b64, getbio);
} else if (strncmp(reqbuf, "POST ", 5) != 0) {
BIO_printf(bio_err, "Invalid request -- bad HTTP verb\n");
return 1;
}
/* Read and skip past the headers. */
for (;;) {
len = BIO_gets(cbio, inbuf, sizeof inbuf);
if (len <= 0)
return 1;
if ((inbuf[0] == '\r') || (inbuf[0] == '\n'))
break;
}
/* Try to read OCSP request */
if (getbio) {
req = d2i_OCSP_REQUEST_bio(getbio, NULL);
BIO_free_all(getbio);
} else
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 *cbio, const char *host,
const char *path,
const STACK_OF(CONF_VALUE) *headers,
OCSP_REQUEST *req, int req_timeout)
{
int fd;
int rv;
int i;
int add_host = 1;
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(bio_err, "Error connecting BIO\n");
return NULL;
}
if (BIO_get_fd(cbio, &fd) < 0) {
BIO_puts(bio_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(bio_err, "Timeout on connect\n");
return NULL;
}
}
ctx = OCSP_sendreq_new(cbio, path, NULL, -1);
if (ctx == NULL)
return NULL;
for (i = 0; i < sk_CONF_VALUE_num(headers); i++) {
CONF_VALUE *hdr = sk_CONF_VALUE_value(headers, i);
if (add_host == 1 && strcasecmp("host", hdr->name) == 0)
add_host = 0;
if (!OCSP_REQ_CTX_add1_header(ctx, hdr->name, hdr->value))
goto err;
}
if (add_host == 1 && OCSP_REQ_CTX_add1_header(ctx, "Host", host) == 0)
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(bio_err, "Unexpected retry condition\n");
goto err;
}
if (rv == 0) {
BIO_puts(bio_err, "Timeout on request\n");
break;
}
if (rv == -1) {
BIO_puts(bio_err, "Select error\n");
break;
}
}
err:
OCSP_REQ_CTX_free(ctx);
return rsp;
}
OCSP_RESPONSE *process_responder(OCSP_REQUEST *req,
const char *host, const char *path,
const char *port, int use_ssl,
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(bio_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(TLS_client_method());
if (ctx == NULL) {
BIO_printf(bio_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(cbio, host, path, headers, req, req_timeout);
if (!resp)
BIO_printf(bio_err, "Error querying OCSP responder\n");
end:
BIO_free_all(cbio);
SSL_CTX_free(ctx);
return resp;
}
#endif
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