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openssl/apps/req.c
Richard Levitte bfa470a4f6 Add 'openssl req' option to specify extension values on command line 
The idea is to be able to add extension value lines directly on the
command line instead of through the config file, for example:

    openssl req -new -extension 'subjectAltName = DNS:dom.ain, DNS:oth.er' \
                     -extension 'certificatePolicies = 1.2.3.4'

Fixes #3311

Thank you Jacob Hoffman-Andrews for the inspiration

Reviewed-by: Andy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4986)
2017-12-28 16:07:58 +01:00

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48 KiB
C
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/*
* Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/evp.h>
#include <openssl/conf.h>
#include <openssl/err.h>
#include <openssl/asn1.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include <openssl/objects.h>
#include <openssl/pem.h>
#include <openssl/bn.h>
#ifndef OPENSSL_NO_RSA
# include <openssl/rsa.h>
#endif
#ifndef OPENSSL_NO_DSA
# include <openssl/dsa.h>
#endif
#define SECTION "req"
#define BITS "default_bits"
#define KEYFILE "default_keyfile"
#define PROMPT "prompt"
#define DISTINGUISHED_NAME "distinguished_name"
#define ATTRIBUTES "attributes"
#define V3_EXTENSIONS "x509_extensions"
#define REQ_EXTENSIONS "req_extensions"
#define STRING_MASK "string_mask"
#define UTF8_IN "utf8"
#define DEFAULT_KEY_LENGTH 2048
#define MIN_KEY_LENGTH 512
static int make_REQ(X509_REQ *req, EVP_PKEY *pkey, char *dn, int mutlirdn,
int attribs, unsigned long chtype);
static int build_subject(X509_REQ *req, const char *subj, unsigned long chtype,
int multirdn);
static int prompt_info(X509_REQ *req,
STACK_OF(CONF_VALUE) *dn_sk, const char *dn_sect,
STACK_OF(CONF_VALUE) *attr_sk, const char *attr_sect,
int attribs, unsigned long chtype);
static int auto_info(X509_REQ *req, STACK_OF(CONF_VALUE) *sk,
STACK_OF(CONF_VALUE) *attr, int attribs,
unsigned long chtype);
static int add_attribute_object(X509_REQ *req, char *text, const char *def,
char *value, int nid, int n_min, int n_max,
unsigned long chtype);
static int add_DN_object(X509_NAME *n, char *text, const char *def,
char *value, int nid, int n_min, int n_max,
unsigned long chtype, int mval);
static int genpkey_cb(EVP_PKEY_CTX *ctx);
static int req_check_len(int len, int n_min, int n_max);
static int check_end(const char *str, const char *end);
static int join(char buf[], size_t buf_size, const char *name,
const char *tail, const char *desc);
static EVP_PKEY_CTX *set_keygen_ctx(const char *gstr,
int *pkey_type, long *pkeylen,
char **palgnam, ENGINE *keygen_engine);
static CONF *req_conf = NULL;
static CONF *addext_conf = NULL;
static int batch = 0;
typedef enum OPTION_choice {
OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
OPT_INFORM, OPT_OUTFORM, OPT_ENGINE, OPT_KEYGEN_ENGINE, OPT_KEY,
OPT_PUBKEY, OPT_NEW, OPT_CONFIG, OPT_KEYFORM, OPT_IN, OPT_OUT,
OPT_KEYOUT, OPT_PASSIN, OPT_PASSOUT, OPT_NEWKEY,
OPT_PKEYOPT, OPT_SIGOPT, OPT_BATCH, OPT_NEWHDR, OPT_MODULUS,
OPT_VERIFY, OPT_NODES, OPT_NOOUT, OPT_VERBOSE, OPT_UTF8,
OPT_NAMEOPT, OPT_REQOPT, OPT_SUBJ, OPT_SUBJECT, OPT_TEXT, OPT_X509,
OPT_MULTIVALUE_RDN, OPT_DAYS, OPT_SET_SERIAL, OPT_ADDEXT, OPT_EXTENSIONS,
OPT_REQEXTS, OPT_PRECERT, OPT_MD,
OPT_R_ENUM
} OPTION_CHOICE;
const OPTIONS req_options[] = {
{"help", OPT_HELP, '-', "Display this summary"},
{"inform", OPT_INFORM, 'F', "Input format - DER or PEM"},
{"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
{"in", OPT_IN, '<', "Input file"},
{"out", OPT_OUT, '>', "Output file"},
{"key", OPT_KEY, 's', "Private key to use"},
{"keyform", OPT_KEYFORM, 'f', "Key file format"},
{"pubkey", OPT_PUBKEY, '-', "Output public key"},
{"new", OPT_NEW, '-', "New request"},
{"config", OPT_CONFIG, '<', "Request template file"},
{"keyout", OPT_KEYOUT, '>', "File to send the key to"},
{"passin", OPT_PASSIN, 's', "Private key password source"},
{"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
OPT_R_OPTIONS,
{"newkey", OPT_NEWKEY, 's', "Specify as type:bits"},
{"pkeyopt", OPT_PKEYOPT, 's', "Public key options as opt:value"},
{"sigopt", OPT_SIGOPT, 's', "Signature parameter in n:v form"},
{"batch", OPT_BATCH, '-',
"Do not ask anything during request generation"},
{"newhdr", OPT_NEWHDR, '-', "Output \"NEW\" in the header lines"},
{"modulus", OPT_MODULUS, '-', "RSA modulus"},
{"verify", OPT_VERIFY, '-', "Verify signature on REQ"},
{"nodes", OPT_NODES, '-', "Don't encrypt the output key"},
{"noout", OPT_NOOUT, '-', "Do not output REQ"},
{"verbose", OPT_VERBOSE, '-', "Verbose output"},
{"utf8", OPT_UTF8, '-', "Input characters are UTF8 (default ASCII)"},
{"nameopt", OPT_NAMEOPT, 's', "Various certificate name options"},
{"reqopt", OPT_REQOPT, 's', "Various request text options"},
{"text", OPT_TEXT, '-', "Text form of request"},
{"x509", OPT_X509, '-',
"Output a x509 structure instead of a cert request"},
{OPT_MORE_STR, 1, 1, "(Required by some CA's)"},
{"subj", OPT_SUBJ, 's', "Set or modify request subject"},
{"subject", OPT_SUBJECT, '-', "Output the request's subject"},
{"multivalue-rdn", OPT_MULTIVALUE_RDN, '-',
"Enable support for multivalued RDNs"},
{"days", OPT_DAYS, 'p', "Number of days cert is valid for"},
{"set_serial", OPT_SET_SERIAL, 's', "Serial number to use"},
{"addext", OPT_ADDEXT, 's',
"Additional cert extension key=value pair (may be given more than once)"},
{"extensions", OPT_EXTENSIONS, 's',
"Cert extension section (override value in config file)"},
{"reqexts", OPT_REQEXTS, 's',
"Request extension section (override value in config file)"},
{"precert", OPT_PRECERT, '-', "Add a poison extension (implies -new)"},
{"", OPT_MD, '-', "Any supported digest"},
#ifndef OPENSSL_NO_ENGINE
{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
{"keygen_engine", OPT_KEYGEN_ENGINE, 's',
"Specify engine to be used for key generation operations"},
#endif
{NULL}
};
int req_main(int argc, char **argv)
{
ASN1_INTEGER *serial = NULL;
BIO *in = NULL, *out = NULL;
ENGINE *e = NULL, *gen_eng = NULL;
EVP_PKEY *pkey = NULL;
EVP_PKEY_CTX *genctx = NULL;
STACK_OF(OPENSSL_STRING) *pkeyopts = NULL, *sigopts = NULL;
X509 *x509ss = NULL;
X509_REQ *req = NULL;
const EVP_CIPHER *cipher = NULL;
const EVP_MD *md_alg = NULL, *digest = NULL;
BIO *addext_bio = NULL;
char *extensions = NULL, *infile = NULL;
char *outfile = NULL, *keyfile = NULL;
char *keyalgstr = NULL, *p, *prog, *passargin = NULL, *passargout = NULL;
char *passin = NULL, *passout = NULL;
char *nofree_passin = NULL, *nofree_passout = NULL;
char *req_exts = NULL, *subj = NULL;
char *template = default_config_file, *keyout = NULL;
const char *keyalg = NULL;
OPTION_CHOICE o;
int ret = 1, x509 = 0, days = 0, i = 0, newreq = 0, verbose = 0;
int pkey_type = -1, private = 0;
int informat = FORMAT_PEM, outformat = FORMAT_PEM, keyform = FORMAT_PEM;
int modulus = 0, multirdn = 0, verify = 0, noout = 0, text = 0;
int nodes = 0, newhdr = 0, subject = 0, pubkey = 0, precert = 0;
long newkey = -1;
unsigned long chtype = MBSTRING_ASC, reqflag = 0;
#ifndef OPENSSL_NO_DES
cipher = EVP_des_ede3_cbc();
#endif
prog = opt_init(argc, argv, req_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:
opt_help(req_options);
ret = 0;
goto end;
case OPT_INFORM:
if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
goto opthelp;
break;
case OPT_OUTFORM:
if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
goto opthelp;
break;
case OPT_ENGINE:
e = setup_engine(opt_arg(), 0);
break;
case OPT_KEYGEN_ENGINE:
#ifndef OPENSSL_NO_ENGINE
gen_eng = ENGINE_by_id(opt_arg());
if (gen_eng == NULL) {
BIO_printf(bio_err, "Can't find keygen engine %s\n", *argv);
goto opthelp;
}
#endif
break;
case OPT_KEY:
keyfile = opt_arg();
break;
case OPT_PUBKEY:
pubkey = 1;
break;
case OPT_NEW:
newreq = 1;
break;
case OPT_CONFIG:
template = opt_arg();
break;
case OPT_KEYFORM:
if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyform))
goto opthelp;
break;
case OPT_IN:
infile = opt_arg();
break;
case OPT_OUT:
outfile = opt_arg();
break;
case OPT_KEYOUT:
keyout = opt_arg();
break;
case OPT_PASSIN:
passargin = opt_arg();
break;
case OPT_PASSOUT:
passargout = opt_arg();
break;
case OPT_R_CASES:
if (!opt_rand(o))
goto end;
break;
case OPT_NEWKEY:
keyalg = opt_arg();
newreq = 1;
break;
case OPT_PKEYOPT:
if (!pkeyopts)
pkeyopts = sk_OPENSSL_STRING_new_null();
if (!pkeyopts || !sk_OPENSSL_STRING_push(pkeyopts, opt_arg()))
goto opthelp;
break;
case OPT_SIGOPT:
if (!sigopts)
sigopts = sk_OPENSSL_STRING_new_null();
if (!sigopts || !sk_OPENSSL_STRING_push(sigopts, opt_arg()))
goto opthelp;
break;
case OPT_BATCH:
batch = 1;
break;
case OPT_NEWHDR:
newhdr = 1;
break;
case OPT_MODULUS:
modulus = 1;
break;
case OPT_VERIFY:
verify = 1;
break;
case OPT_NODES:
nodes = 1;
break;
case OPT_NOOUT:
noout = 1;
break;
case OPT_VERBOSE:
verbose = 1;
break;
case OPT_UTF8:
chtype = MBSTRING_UTF8;
break;
case OPT_NAMEOPT:
if (!set_nameopt(opt_arg()))
goto opthelp;
break;
case OPT_REQOPT:
if (!set_cert_ex(&reqflag, opt_arg()))
goto opthelp;
break;
case OPT_TEXT:
text = 1;
break;
case OPT_X509:
x509 = 1;
break;
case OPT_DAYS:
days = atoi(opt_arg());
break;
case OPT_SET_SERIAL:
if (serial != NULL) {
BIO_printf(bio_err, "Serial number supplied twice\n");
goto opthelp;
}
serial = s2i_ASN1_INTEGER(NULL, opt_arg());
if (serial == NULL)
goto opthelp;
break;
case OPT_SUBJECT:
subject = 1;
break;
case OPT_SUBJ:
subj = opt_arg();
break;
case OPT_MULTIVALUE_RDN:
multirdn = 1;
break;
case OPT_ADDEXT:
if (addext_bio == NULL) {
addext_bio = BIO_new(BIO_s_mem());
}
if (addext_bio == NULL
|| BIO_printf(addext_bio, "%s\n", opt_arg()) < 0)
goto end;
break;
case OPT_EXTENSIONS:
extensions = opt_arg();
break;
case OPT_REQEXTS:
req_exts = opt_arg();
break;
case OPT_PRECERT:
newreq = precert = 1;
break;
case OPT_MD:
if (!opt_md(opt_unknown(), &md_alg))
goto opthelp;
digest = md_alg;
break;
}
}
argc = opt_num_rest();
if (argc != 0)
goto opthelp;
if (days && !x509)
BIO_printf(bio_err, "Ignoring -days; not generating a certificate\n");
if (x509 && infile == NULL)
newreq = 1;
/* TODO: simplify this as pkey is still always NULL here */
private = newreq && (pkey == NULL) ? 1 : 0;
if (!app_passwd(passargin, passargout, &passin, &passout)) {
BIO_printf(bio_err, "Error getting passwords\n");
goto end;
}
if (verbose)
BIO_printf(bio_err, "Using configuration from %s\n", template);
req_conf = app_load_config(template);
if (addext_bio) {
if (verbose)
BIO_printf(bio_err,
"Using additional configuraton from command line\n");
addext_conf = app_load_config_bio(addext_bio, NULL);
}
if (template != default_config_file && !app_load_modules(req_conf))
goto end;
if (req_conf != NULL) {
p = NCONF_get_string(req_conf, NULL, "oid_file");
if (p == NULL)
ERR_clear_error();
if (p != NULL) {
BIO *oid_bio;
oid_bio = BIO_new_file(p, "r");
if (oid_bio == NULL) {
/*-
BIO_printf(bio_err,"problems opening %s for extra oid's\n",p);
ERR_print_errors(bio_err);
*/
} else {
OBJ_create_objects(oid_bio);
BIO_free(oid_bio);
}
}
}
if (!add_oid_section(req_conf))
goto end;
if (md_alg == NULL) {
p = NCONF_get_string(req_conf, SECTION, "default_md");
if (p == NULL) {
ERR_clear_error();
} else {
if (!opt_md(p, &md_alg))
goto opthelp;
digest = md_alg;
}
}
if (extensions == NULL) {
extensions = NCONF_get_string(req_conf, SECTION, V3_EXTENSIONS);
if (extensions == NULL)
ERR_clear_error();
}
if (extensions != NULL) {
/* Check syntax of file */
X509V3_CTX ctx;
X509V3_set_ctx_test(&ctx);
X509V3_set_nconf(&ctx, req_conf);
if (!X509V3_EXT_add_nconf(req_conf, &ctx, extensions, NULL)) {
BIO_printf(bio_err,
"Error Loading extension section %s\n", extensions);
goto end;
}
}
if (addext_conf != NULL) {
/* Check syntax of command line extensions */
X509V3_CTX ctx;
X509V3_set_ctx_test(&ctx);
X509V3_set_nconf(&ctx, addext_conf);
if (!X509V3_EXT_add_nconf(addext_conf, &ctx, "default", NULL)) {
BIO_printf(bio_err, "Error Loading command line extensions\n");
goto end;
}
}
if (passin == NULL) {
passin = nofree_passin =
NCONF_get_string(req_conf, SECTION, "input_password");
if (passin == NULL)
ERR_clear_error();
}
if (passout == NULL) {
passout = nofree_passout =
NCONF_get_string(req_conf, SECTION, "output_password");
if (passout == NULL)
ERR_clear_error();
}
p = NCONF_get_string(req_conf, SECTION, STRING_MASK);
if (p == NULL)
ERR_clear_error();
if (p != NULL && !ASN1_STRING_set_default_mask_asc(p)) {
BIO_printf(bio_err, "Invalid global string mask setting %s\n", p);
goto end;
}
if (chtype != MBSTRING_UTF8) {
p = NCONF_get_string(req_conf, SECTION, UTF8_IN);
if (p == NULL)
ERR_clear_error();
else if (strcmp(p, "yes") == 0)
chtype = MBSTRING_UTF8;
}
if (req_exts == NULL) {
req_exts = NCONF_get_string(req_conf, SECTION, REQ_EXTENSIONS);
if (req_exts == NULL)
ERR_clear_error();
}
if (req_exts != NULL) {
/* Check syntax of file */
X509V3_CTX ctx;
X509V3_set_ctx_test(&ctx);
X509V3_set_nconf(&ctx, req_conf);
if (!X509V3_EXT_add_nconf(req_conf, &ctx, req_exts, NULL)) {
BIO_printf(bio_err,
"Error Loading request extension section %s\n",
req_exts);
goto end;
}
}
if (keyfile != NULL) {
pkey = load_key(keyfile, keyform, 0, passin, e, "Private Key");
if (pkey == NULL) {
/* load_key() has already printed an appropriate message */
goto end;
} else {
app_RAND_load_conf(req_conf, SECTION);
}
}
if (newreq && (pkey == NULL)) {
app_RAND_load_conf(req_conf, SECTION);
if (!NCONF_get_number(req_conf, SECTION, BITS, &newkey)) {
newkey = DEFAULT_KEY_LENGTH;
}
if (keyalg != NULL) {
genctx = set_keygen_ctx(keyalg, &pkey_type, &newkey,
&keyalgstr, gen_eng);
if (genctx == NULL)
goto end;
}
if (newkey < MIN_KEY_LENGTH
&& (pkey_type == EVP_PKEY_RSA || pkey_type == EVP_PKEY_DSA)) {
BIO_printf(bio_err, "private key length is too short,\n");
BIO_printf(bio_err, "it needs to be at least %d bits, not %ld\n",
MIN_KEY_LENGTH, newkey);
goto end;
}
if (genctx == NULL) {
genctx = set_keygen_ctx(NULL, &pkey_type, &newkey,
&keyalgstr, gen_eng);
if (!genctx)
goto end;
}
if (pkeyopts != NULL) {
char *genopt;
for (i = 0; i < sk_OPENSSL_STRING_num(pkeyopts); i++) {
genopt = sk_OPENSSL_STRING_value(pkeyopts, i);
if (pkey_ctrl_string(genctx, genopt) <= 0) {
BIO_printf(bio_err, "parameter error \"%s\"\n", genopt);
ERR_print_errors(bio_err);
goto end;
}
}
}
if (pkey_type == EVP_PKEY_EC) {
BIO_printf(bio_err, "Generating an EC private key\n");
} else {
BIO_printf(bio_err, "Generating a %ld bit %s private key\n",
newkey, keyalgstr);
}
EVP_PKEY_CTX_set_cb(genctx, genpkey_cb);
EVP_PKEY_CTX_set_app_data(genctx, bio_err);
if (EVP_PKEY_keygen(genctx, &pkey) <= 0) {
BIO_puts(bio_err, "Error Generating Key\n");
goto end;
}
EVP_PKEY_CTX_free(genctx);
genctx = NULL;
if (keyout == NULL) {
keyout = NCONF_get_string(req_conf, SECTION, KEYFILE);
if (keyout == NULL)
ERR_clear_error();
}
if (keyout == NULL)
BIO_printf(bio_err, "writing new private key to stdout\n");
else
BIO_printf(bio_err, "writing new private key to '%s'\n", keyout);
out = bio_open_owner(keyout, outformat, private);
if (out == NULL)
goto end;
p = NCONF_get_string(req_conf, SECTION, "encrypt_rsa_key");
if (p == NULL) {
ERR_clear_error();
p = NCONF_get_string(req_conf, SECTION, "encrypt_key");
if (p == NULL)
ERR_clear_error();
}
if ((p != NULL) && (strcmp(p, "no") == 0))
cipher = NULL;
if (nodes)
cipher = NULL;
i = 0;
loop:
assert(private);
if (!PEM_write_bio_PrivateKey(out, pkey, cipher,
NULL, 0, NULL, passout)) {
if ((ERR_GET_REASON(ERR_peek_error()) ==
PEM_R_PROBLEMS_GETTING_PASSWORD) && (i < 3)) {
ERR_clear_error();
i++;
goto loop;
}
goto end;
}
BIO_free(out);
out = NULL;
BIO_printf(bio_err, "-----\n");
}
if (!newreq) {
in = bio_open_default(infile, 'r', informat);
if (in == NULL)
goto end;
if (informat == FORMAT_ASN1)
req = d2i_X509_REQ_bio(in, NULL);
else
req = PEM_read_bio_X509_REQ(in, NULL, NULL, NULL);
if (req == NULL) {
BIO_printf(bio_err, "unable to load X509 request\n");
goto end;
}
}
if (newreq || x509) {
if (pkey == NULL) {
BIO_printf(bio_err, "you need to specify a private key\n");
goto end;
}
if (req == NULL) {
req = X509_REQ_new();
if (req == NULL) {
goto end;
}
i = make_REQ(req, pkey, subj, multirdn, !x509, chtype);
subj = NULL; /* done processing '-subj' option */
if (!i) {
BIO_printf(bio_err, "problems making Certificate Request\n");
goto end;
}
}
if (x509) {
EVP_PKEY *tmppkey;
X509V3_CTX ext_ctx;
if ((x509ss = X509_new()) == NULL)
goto end;
/* Set version to V3 */
if ((extensions != NULL || addext_conf != NULL)
&& !X509_set_version(x509ss, 2))
goto end;
if (serial != NULL) {
if (!X509_set_serialNumber(x509ss, serial))
goto end;
} else {
if (!rand_serial(NULL, X509_get_serialNumber(x509ss)))
goto end;
}
if (!X509_set_issuer_name(x509ss, X509_REQ_get_subject_name(req)))
goto end;
if (days == 0) {
/* set default days if it's not specified */
days = 30;
}
if (!set_cert_times(x509ss, NULL, NULL, days))
goto end;
if (!X509_set_subject_name
(x509ss, X509_REQ_get_subject_name(req)))
goto end;
tmppkey = X509_REQ_get0_pubkey(req);
if (!tmppkey || !X509_set_pubkey(x509ss, tmppkey))
goto end;
/* Set up V3 context struct */
X509V3_set_ctx(&ext_ctx, x509ss, x509ss, NULL, NULL, 0);
X509V3_set_nconf(&ext_ctx, req_conf);
/* Add extensions */
if (extensions != NULL && !X509V3_EXT_add_nconf(req_conf,
&ext_ctx, extensions,
x509ss)) {
BIO_printf(bio_err, "Error Loading extension section %s\n",
extensions);
goto end;
}
if (addext_conf != NULL
&& !X509V3_EXT_add_nconf(addext_conf, &ext_ctx, "default",
x509ss)) {
BIO_printf(bio_err, "Error Loading command line extensions\n");
goto end;
}
/* If a pre-cert was requested, we need to add a poison extension */
if (precert) {
if (X509_add1_ext_i2d(x509ss, NID_ct_precert_poison, NULL, 1, 0)
!= 1) {
BIO_printf(bio_err, "Error adding poison extension\n");
goto end;
}
}
i = do_X509_sign(x509ss, pkey, digest, sigopts);
if (!i) {
ERR_print_errors(bio_err);
goto end;
}
} else {
X509V3_CTX ext_ctx;
/* Set up V3 context struct */
X509V3_set_ctx(&ext_ctx, NULL, NULL, req, NULL, 0);
X509V3_set_nconf(&ext_ctx, req_conf);
/* Add extensions */
if (req_exts != NULL
&& !X509V3_EXT_REQ_add_nconf(req_conf, &ext_ctx,
req_exts, req)) {
BIO_printf(bio_err, "Error Loading extension section %s\n",
req_exts);
goto end;
}
if (addext_conf != NULL
&& !X509V3_EXT_REQ_add_nconf(addext_conf, &ext_ctx, "default",
req)) {
BIO_printf(bio_err, "Error Loading command line extensions\n");
goto end;
}
i = do_X509_REQ_sign(req, pkey, digest, sigopts);
if (!i) {
ERR_print_errors(bio_err);
goto end;
}
}
}
if (subj && x509) {
BIO_printf(bio_err, "Cannot modify certificate subject\n");
goto end;
}
if (subj && !x509) {
if (verbose) {
BIO_printf(bio_err, "Modifying Request's Subject\n");
print_name(bio_err, "old subject=",
X509_REQ_get_subject_name(req), get_nameopt());
}
if (build_subject(req, subj, chtype, multirdn) == 0) {
BIO_printf(bio_err, "ERROR: cannot modify subject\n");
ret = 1;
goto end;
}
if (verbose) {
print_name(bio_err, "new subject=",
X509_REQ_get_subject_name(req), get_nameopt());
}
}
if (verify && !x509) {
EVP_PKEY *tpubkey = pkey;
if (tpubkey == NULL) {
tpubkey = X509_REQ_get0_pubkey(req);
if (tpubkey == NULL)
goto end;
}
i = X509_REQ_verify(req, tpubkey);
if (i < 0) {
goto end;
} else if (i == 0) {
BIO_printf(bio_err, "verify failure\n");
ERR_print_errors(bio_err);
} else { /* if (i > 0) */
BIO_printf(bio_err, "verify OK\n");
}
}
if (noout && !text && !modulus && !subject && !pubkey) {
ret = 0;
goto end;
}
out = bio_open_default(outfile,
keyout != NULL && outfile != NULL &&
strcmp(keyout, outfile) == 0 ? 'a' : 'w',
outformat);
if (out == NULL)
goto end;
if (pubkey) {
EVP_PKEY *tpubkey = X509_REQ_get0_pubkey(req);
if (tpubkey == NULL) {
BIO_printf(bio_err, "Error getting public key\n");
ERR_print_errors(bio_err);
goto end;
}
PEM_write_bio_PUBKEY(out, tpubkey);
}
if (text) {
if (x509)
X509_print_ex(out, x509ss, get_nameopt(), reqflag);
else
X509_REQ_print_ex(out, req, get_nameopt(), reqflag);
}
if (subject) {
if (x509)
print_name(out, "subject=", X509_get_subject_name(x509ss),
get_nameopt());
else
print_name(out, "subject=", X509_REQ_get_subject_name(req),
get_nameopt());
}
if (modulus) {
EVP_PKEY *tpubkey;
if (x509)
tpubkey = X509_get0_pubkey(x509ss);
else
tpubkey = X509_REQ_get0_pubkey(req);
if (tpubkey == NULL) {
fprintf(stdout, "Modulus=unavailable\n");
goto end;
}
fprintf(stdout, "Modulus=");
#ifndef OPENSSL_NO_RSA
if (EVP_PKEY_base_id(tpubkey) == EVP_PKEY_RSA) {
const BIGNUM *n;
RSA_get0_key(EVP_PKEY_get0_RSA(tpubkey), &n, NULL, NULL);
BN_print(out, n);
} else
#endif
fprintf(stdout, "Wrong Algorithm type");
fprintf(stdout, "\n");
}
if (!noout && !x509) {
if (outformat == FORMAT_ASN1)
i = i2d_X509_REQ_bio(out, req);
else if (newhdr)
i = PEM_write_bio_X509_REQ_NEW(out, req);
else
i = PEM_write_bio_X509_REQ(out, req);
if (!i) {
BIO_printf(bio_err, "unable to write X509 request\n");
goto end;
}
}
if (!noout && x509 && (x509ss != NULL)) {
if (outformat == FORMAT_ASN1)
i = i2d_X509_bio(out, x509ss);
else
i = PEM_write_bio_X509(out, x509ss);
if (!i) {
BIO_printf(bio_err, "unable to write X509 certificate\n");
goto end;
}
}
ret = 0;
end:
if (ret) {
ERR_print_errors(bio_err);
}
NCONF_free(req_conf);
BIO_free(addext_bio);
BIO_free(in);
BIO_free_all(out);
EVP_PKEY_free(pkey);
EVP_PKEY_CTX_free(genctx);
sk_OPENSSL_STRING_free(pkeyopts);
sk_OPENSSL_STRING_free(sigopts);
#ifndef OPENSSL_NO_ENGINE
ENGINE_free(gen_eng);
#endif
OPENSSL_free(keyalgstr);
X509_REQ_free(req);
X509_free(x509ss);
ASN1_INTEGER_free(serial);
release_engine(e);
if (passin != nofree_passin)
OPENSSL_free(passin);
if (passout != nofree_passout)
OPENSSL_free(passout);
return ret;
}
static int make_REQ(X509_REQ *req, EVP_PKEY *pkey, char *subj, int multirdn,
int attribs, unsigned long chtype)
{
int ret = 0, i;
char no_prompt = 0;
STACK_OF(CONF_VALUE) *dn_sk, *attr_sk = NULL;
char *tmp, *dn_sect, *attr_sect;
tmp = NCONF_get_string(req_conf, SECTION, PROMPT);
if (tmp == NULL)
ERR_clear_error();
if ((tmp != NULL) && strcmp(tmp, "no") == 0)
no_prompt = 1;
dn_sect = NCONF_get_string(req_conf, SECTION, DISTINGUISHED_NAME);
if (dn_sect == NULL) {
BIO_printf(bio_err, "unable to find '%s' in config\n",
DISTINGUISHED_NAME);
goto err;
}
dn_sk = NCONF_get_section(req_conf, dn_sect);
if (dn_sk == NULL) {
BIO_printf(bio_err, "unable to get '%s' section\n", dn_sect);
goto err;
}
attr_sect = NCONF_get_string(req_conf, SECTION, ATTRIBUTES);
if (attr_sect == NULL) {
ERR_clear_error();
attr_sk = NULL;
} else {
attr_sk = NCONF_get_section(req_conf, attr_sect);
if (attr_sk == NULL) {
BIO_printf(bio_err, "unable to get '%s' section\n", attr_sect);
goto err;
}
}
/* setup version number */
if (!X509_REQ_set_version(req, 0L))
goto err; /* version 1 */
if (subj)
i = build_subject(req, subj, chtype, multirdn);
else if (no_prompt)
i = auto_info(req, dn_sk, attr_sk, attribs, chtype);
else
i = prompt_info(req, dn_sk, dn_sect, attr_sk, attr_sect, attribs,
chtype);
if (!i)
goto err;
if (!X509_REQ_set_pubkey(req, pkey))
goto err;
ret = 1;
err:
return ret;
}
/*
* subject is expected to be in the format /type0=value0/type1=value1/type2=...
* where characters may be escaped by \
*/
static int build_subject(X509_REQ *req, const char *subject, unsigned long chtype,
int multirdn)
{
X509_NAME *n;
if ((n = parse_name(subject, chtype, multirdn)) == NULL)
return 0;
if (!X509_REQ_set_subject_name(req, n)) {
X509_NAME_free(n);
return 0;
}
X509_NAME_free(n);
return 1;
}
static int prompt_info(X509_REQ *req,
STACK_OF(CONF_VALUE) *dn_sk, const char *dn_sect,
STACK_OF(CONF_VALUE) *attr_sk, const char *attr_sect,
int attribs, unsigned long chtype)
{
int i;
char *p, *q;
char buf[100];
int nid, mval;
long n_min, n_max;
char *type, *value;
const char *def;
CONF_VALUE *v;
X509_NAME *subj;
subj = X509_REQ_get_subject_name(req);
if (!batch) {
BIO_printf(bio_err,
"You are about to be asked to enter information that will be incorporated\n");
BIO_printf(bio_err, "into your certificate request.\n");
BIO_printf(bio_err,
"What you are about to enter is what is called a Distinguished Name or a DN.\n");
BIO_printf(bio_err,
"There are quite a few fields but you can leave some blank\n");
BIO_printf(bio_err,
"For some fields there will be a default value,\n");
BIO_printf(bio_err,
"If you enter '.', the field will be left blank.\n");
BIO_printf(bio_err, "-----\n");
}
if (sk_CONF_VALUE_num(dn_sk)) {
i = -1;
start:
for ( ; ; ) {
i++;
if (sk_CONF_VALUE_num(dn_sk) <= i)
break;
v = sk_CONF_VALUE_value(dn_sk, i);
p = q = NULL;
type = v->name;
if (!check_end(type, "_min") || !check_end(type, "_max") ||
!check_end(type, "_default") || !check_end(type, "_value"))
continue;
/*
* Skip past any leading X. X: X, etc to allow for multiple
* instances
*/
for (p = v->name; *p; p++)
if ((*p == ':') || (*p == ',') || (*p == '.')) {
p++;
if (*p)
type = p;
break;
}
if (*type == '+') {
mval = -1;
type++;
} else {
mval = 0;
}
/* If OBJ not recognised ignore it */
if ((nid = OBJ_txt2nid(type)) == NID_undef)
goto start;
if (!join(buf, sizeof(buf), v->name, "_default", "Name"))
return 0;
if ((def = NCONF_get_string(req_conf, dn_sect, buf)) == NULL) {
ERR_clear_error();
def = "";
}
if (!join(buf, sizeof(buf), v->name, "_value", "Name"))
return 0;
if ((value = NCONF_get_string(req_conf, dn_sect, buf)) == NULL) {
ERR_clear_error();
value = NULL;
}
if (!join(buf, sizeof(buf), v->name, "_min", "Name"))
return 0;
if (!NCONF_get_number(req_conf, dn_sect, buf, &n_min)) {
ERR_clear_error();
n_min = -1;
}
if (!join(buf, sizeof(buf), v->name, "_max", "Name"))
return 0;
if (!NCONF_get_number(req_conf, dn_sect, buf, &n_max)) {
ERR_clear_error();
n_max = -1;
}
if (!add_DN_object(subj, v->value, def, value, nid,
n_min, n_max, chtype, mval))
return 0;
}
if (X509_NAME_entry_count(subj) == 0) {
BIO_printf(bio_err,
"error, no objects specified in config file\n");
return 0;
}
if (attribs) {
if ((attr_sk != NULL) && (sk_CONF_VALUE_num(attr_sk) > 0)
&& (!batch)) {
BIO_printf(bio_err,
"\nPlease enter the following 'extra' attributes\n");
BIO_printf(bio_err,
"to be sent with your certificate request\n");
}
i = -1;
start2:
for ( ; ; ) {
i++;
if ((attr_sk == NULL) || (sk_CONF_VALUE_num(attr_sk) <= i))
break;
v = sk_CONF_VALUE_value(attr_sk, i);
type = v->name;
if ((nid = OBJ_txt2nid(type)) == NID_undef)
goto start2;
if (!join(buf, sizeof(buf), type, "_default", "Name"))
return 0;
if ((def = NCONF_get_string(req_conf, attr_sect, buf))
== NULL) {
ERR_clear_error();
def = "";
}
if (!join(buf, sizeof(buf), type, "_value", "Name"))
return 0;
if ((value = NCONF_get_string(req_conf, attr_sect, buf))
== NULL) {
ERR_clear_error();
value = NULL;
}
if (!join(buf, sizeof(buf), type,"_min", "Name"))
return 0;
if (!NCONF_get_number(req_conf, attr_sect, buf, &n_min)) {
ERR_clear_error();
n_min = -1;
}
if (!join(buf, sizeof(buf), type, "_max", "Name"))
return 0;
if (!NCONF_get_number(req_conf, attr_sect, buf, &n_max)) {
ERR_clear_error();
n_max = -1;
}
if (!add_attribute_object(req,
v->value, def, value, nid, n_min,
n_max, chtype))
return 0;
}
}
} else {
BIO_printf(bio_err, "No template, please set one up.\n");
return 0;
}
return 1;
}
static int auto_info(X509_REQ *req, STACK_OF(CONF_VALUE) *dn_sk,
STACK_OF(CONF_VALUE) *attr_sk, int attribs,
unsigned long chtype)
{
int i, spec_char, plus_char;
char *p, *q;
char *type;
CONF_VALUE *v;
X509_NAME *subj;
subj = X509_REQ_get_subject_name(req);
for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
int mval;
v = sk_CONF_VALUE_value(dn_sk, i);
p = q = NULL;
type = v->name;
/*
* Skip past any leading X. X: X, etc to allow for multiple instances
*/
for (p = v->name; *p; p++) {
#ifndef CHARSET_EBCDIC
spec_char = ((*p == ':') || (*p == ',') || (*p == '.'));
#else
spec_char = ((*p == os_toascii[':']) || (*p == os_toascii[','])
|| (*p == os_toascii['.']));
#endif
if (spec_char) {
p++;
if (*p)
type = p;
break;
}
}
#ifndef CHARSET_EBCDIC
plus_char = (*type == '+');
#else
plus_char = (*type == os_toascii['+']);
#endif
if (plus_char) {
type++;
mval = -1;
} else {
mval = 0;
}
if (!X509_NAME_add_entry_by_txt(subj, type, chtype,
(unsigned char *)v->value, -1, -1,
mval))
return 0;
}
if (!X509_NAME_entry_count(subj)) {
BIO_printf(bio_err, "error, no objects specified in config file\n");
return 0;
}
if (attribs) {
for (i = 0; i < sk_CONF_VALUE_num(attr_sk); i++) {
v = sk_CONF_VALUE_value(attr_sk, i);
if (!X509_REQ_add1_attr_by_txt(req, v->name, chtype,
(unsigned char *)v->value, -1))
return 0;
}
}
return 1;
}
static int add_DN_object(X509_NAME *n, char *text, const char *def,
char *value, int nid, int n_min, int n_max,
unsigned long chtype, int mval)
{
int i, ret = 0;
char buf[1024];
start:
if (!batch)
BIO_printf(bio_err, "%s [%s]:", text, def);
(void)BIO_flush(bio_err);
if (value != NULL) {
if (!join(buf, sizeof(buf), value, "\n", "DN value"))
return 0;
BIO_printf(bio_err, "%s\n", value);
} else {
buf[0] = '\0';
if (!batch) {
if (!fgets(buf, sizeof(buf), stdin))
return 0;
} else {
buf[0] = '\n';
buf[1] = '\0';
}
}
if (buf[0] == '\0')
return 0;
if (buf[0] == '\n') {
if ((def == NULL) || (def[0] == '\0'))
return 1;
if (!join(buf, sizeof(buf), def, "\n", "DN default"))
return 0;
} else if ((buf[0] == '.') && (buf[1] == '\n')) {
return 1;
}
i = strlen(buf);
if (buf[i - 1] != '\n') {
BIO_printf(bio_err, "weird input :-(\n");
return 0;
}
buf[--i] = '\0';
#ifdef CHARSET_EBCDIC
ebcdic2ascii(buf, buf, i);
#endif
if (!req_check_len(i, n_min, n_max)) {
if (batch || value)
return 0;
goto start;
}
if (!X509_NAME_add_entry_by_NID(n, nid, chtype,
(unsigned char *)buf, -1, -1, mval))
goto err;
ret = 1;
err:
return ret;
}
static int add_attribute_object(X509_REQ *req, char *text, const char *def,
char *value, int nid, int n_min,
int n_max, unsigned long chtype)
{
int i;
static char buf[1024];
start:
if (!batch)
BIO_printf(bio_err, "%s [%s]:", text, def);
(void)BIO_flush(bio_err);
if (value != NULL) {
if (!join(buf, sizeof(buf), value, "\n", "Attribute value"))
return 0;
BIO_printf(bio_err, "%s\n", value);
} else {
buf[0] = '\0';
if (!batch) {
if (!fgets(buf, sizeof(buf), stdin))
return 0;
} else {
buf[0] = '\n';
buf[1] = '\0';
}
}
if (buf[0] == '\0')
return 0;
if (buf[0] == '\n') {
if ((def == NULL) || (def[0] == '\0'))
return 1;
if (!join(buf, sizeof(buf), def, "\n", "Attribute default"))
return 0;
} else if ((buf[0] == '.') && (buf[1] == '\n')) {
return 1;
}
i = strlen(buf);
if (buf[i - 1] != '\n') {
BIO_printf(bio_err, "weird input :-(\n");
return 0;
}
buf[--i] = '\0';
#ifdef CHARSET_EBCDIC
ebcdic2ascii(buf, buf, i);
#endif
if (!req_check_len(i, n_min, n_max)) {
if (batch || value)
return 0;
goto start;
}
if (!X509_REQ_add1_attr_by_NID(req, nid, chtype,
(unsigned char *)buf, -1)) {
BIO_printf(bio_err, "Error adding attribute\n");
ERR_print_errors(bio_err);
goto err;
}
return 1;
err:
return 0;
}
static int req_check_len(int len, int n_min, int n_max)
{
if ((n_min > 0) && (len < n_min)) {
BIO_printf(bio_err,
"string is too short, it needs to be at least %d bytes long\n",
n_min);
return 0;
}
if ((n_max >= 0) && (len > n_max)) {
BIO_printf(bio_err,
"string is too long, it needs to be no more than %d bytes long\n",
n_max);
return 0;
}
return 1;
}
/* Check if the end of a string matches 'end' */
static int check_end(const char *str, const char *end)
{
size_t elen, slen;
const char *tmp;
elen = strlen(end);
slen = strlen(str);
if (elen > slen)
return 1;
tmp = str + slen - elen;
return strcmp(tmp, end);
}
/*
* Merge the two strings together into the result buffer checking for
* overflow and producing an error message if there is.
*/
static int join(char buf[], size_t buf_size, const char *name,
const char *tail, const char *desc)
{
const size_t name_len = strlen(name), tail_len = strlen(tail);
if (name_len + tail_len + 1 > buf_size) {
BIO_printf(bio_err, "%s '%s' too long\n", desc, name);
return 0;
}
memcpy(buf, name, name_len);
memcpy(buf + name_len, tail, tail_len + 1);
return 1;
}
static EVP_PKEY_CTX *set_keygen_ctx(const char *gstr,
int *pkey_type, long *pkeylen,
char **palgnam, ENGINE *keygen_engine)
{
EVP_PKEY_CTX *gctx = NULL;
EVP_PKEY *param = NULL;
long keylen = -1;
BIO *pbio = NULL;
const char *paramfile = NULL;
if (gstr == NULL) {
*pkey_type = EVP_PKEY_RSA;
keylen = *pkeylen;
} else if (gstr[0] >= '0' && gstr[0] <= '9') {
*pkey_type = EVP_PKEY_RSA;
keylen = atol(gstr);
*pkeylen = keylen;
} else if (strncmp(gstr, "param:", 6) == 0) {
paramfile = gstr + 6;
} else {
const char *p = strchr(gstr, ':');
int len;
ENGINE *tmpeng;
const EVP_PKEY_ASN1_METHOD *ameth;
if (p != NULL)
len = p - gstr;
else
len = strlen(gstr);
/*
* The lookup of a the string will cover all engines so keep a note
* of the implementation.
*/
ameth = EVP_PKEY_asn1_find_str(&tmpeng, gstr, len);
if (ameth == NULL) {
BIO_printf(bio_err, "Unknown algorithm %.*s\n", len, gstr);
return NULL;
}
EVP_PKEY_asn1_get0_info(NULL, pkey_type, NULL, NULL, NULL, ameth);
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(tmpeng);
#endif
if (*pkey_type == EVP_PKEY_RSA) {
if (p != NULL) {
keylen = atol(p + 1);
*pkeylen = keylen;
} else {
keylen = *pkeylen;
}
} else if (p != NULL) {
paramfile = p + 1;
}
}
if (paramfile != NULL) {
pbio = BIO_new_file(paramfile, "r");
if (pbio == NULL) {
BIO_printf(bio_err, "Can't open parameter file %s\n", paramfile);
return NULL;
}
param = PEM_read_bio_Parameters(pbio, NULL);
if (param == NULL) {
X509 *x;
(void)BIO_reset(pbio);
x = PEM_read_bio_X509(pbio, NULL, NULL, NULL);
if (x != NULL) {
param = X509_get_pubkey(x);
X509_free(x);
}
}
BIO_free(pbio);
if (param == NULL) {
BIO_printf(bio_err, "Error reading parameter file %s\n", paramfile);
return NULL;
}
if (*pkey_type == -1) {
*pkey_type = EVP_PKEY_id(param);
} else if (*pkey_type != EVP_PKEY_base_id(param)) {
BIO_printf(bio_err, "Key Type does not match parameters\n");
EVP_PKEY_free(param);
return NULL;
}
}
if (palgnam != NULL) {
const EVP_PKEY_ASN1_METHOD *ameth;
ENGINE *tmpeng;
const char *anam;
ameth = EVP_PKEY_asn1_find(&tmpeng, *pkey_type);
if (ameth == NULL) {
BIO_puts(bio_err, "Internal error: can't find key algorithm\n");
return NULL;
}
EVP_PKEY_asn1_get0_info(NULL, NULL, NULL, NULL, &anam, ameth);
*palgnam = OPENSSL_strdup(anam);
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(tmpeng);
#endif
}
if (param != NULL) {
gctx = EVP_PKEY_CTX_new(param, keygen_engine);
*pkeylen = EVP_PKEY_bits(param);
EVP_PKEY_free(param);
} else {
gctx = EVP_PKEY_CTX_new_id(*pkey_type, keygen_engine);
}
if (gctx == NULL) {
BIO_puts(bio_err, "Error allocating keygen context\n");
ERR_print_errors(bio_err);
return NULL;
}
if (EVP_PKEY_keygen_init(gctx) <= 0) {
BIO_puts(bio_err, "Error initializing keygen context\n");
ERR_print_errors(bio_err);
EVP_PKEY_CTX_free(gctx);
return NULL;
}
#ifndef OPENSSL_NO_RSA
if ((*pkey_type == EVP_PKEY_RSA) && (keylen != -1)) {
if (EVP_PKEY_CTX_set_rsa_keygen_bits(gctx, keylen) <= 0) {
BIO_puts(bio_err, "Error setting RSA keysize\n");
ERR_print_errors(bio_err);
EVP_PKEY_CTX_free(gctx);
return NULL;
}
}
#endif
return gctx;
}
static int genpkey_cb(EVP_PKEY_CTX *ctx)
{
char c = '*';
BIO *b = EVP_PKEY_CTX_get_app_data(ctx);
int p;
p = EVP_PKEY_CTX_get_keygen_info(ctx, 0);
if (p == 0)
c = '.';
if (p == 1)
c = '+';
if (p == 2)
c = '*';
if (p == 3)
c = '\n';
BIO_write(b, &c, 1);
(void)BIO_flush(b);
return 1;
}
static int do_sign_init(EVP_MD_CTX *ctx, EVP_PKEY *pkey,
const EVP_MD *md, STACK_OF(OPENSSL_STRING) *sigopts)
{
EVP_PKEY_CTX *pkctx = NULL;
int i;
if (ctx == NULL)
return 0;
if (!EVP_DigestSignInit(ctx, &pkctx, md, NULL, pkey))
return 0;
for (i = 0; i < sk_OPENSSL_STRING_num(sigopts); i++) {
char *sigopt = sk_OPENSSL_STRING_value(sigopts, i);
if (pkey_ctrl_string(pkctx, sigopt) <= 0) {
BIO_printf(bio_err, "parameter error \"%s\"\n", sigopt);
ERR_print_errors(bio_err);
return 0;
}
}
return 1;
}
int do_X509_sign(X509 *x, EVP_PKEY *pkey, const EVP_MD *md,
STACK_OF(OPENSSL_STRING) *sigopts)
{
int rv;
EVP_MD_CTX *mctx = EVP_MD_CTX_new();
rv = do_sign_init(mctx, pkey, md, sigopts);
if (rv > 0)
rv = X509_sign_ctx(x, mctx);
EVP_MD_CTX_free(mctx);
return rv > 0 ? 1 : 0;
}
int do_X509_REQ_sign(X509_REQ *x, EVP_PKEY *pkey, const EVP_MD *md,
STACK_OF(OPENSSL_STRING) *sigopts)
{
int rv;
EVP_MD_CTX *mctx = EVP_MD_CTX_new();
rv = do_sign_init(mctx, pkey, md, sigopts);
if (rv > 0)
rv = X509_REQ_sign_ctx(x, mctx);
EVP_MD_CTX_free(mctx);
return rv > 0 ? 1 : 0;
}
int do_X509_CRL_sign(X509_CRL *x, EVP_PKEY *pkey, const EVP_MD *md,
STACK_OF(OPENSSL_STRING) *sigopts)
{
int rv;
EVP_MD_CTX *mctx = EVP_MD_CTX_new();
rv = do_sign_init(mctx, pkey, md, sigopts);
if (rv > 0)
rv = X509_CRL_sign_ctx(x, mctx);
EVP_MD_CTX_free(mctx);
return rv > 0 ? 1 : 0;
}
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