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openssl/apps/req.c
Dr. David von Oheimb 342e3652c7 APPS: generated certs bear X.509 V3, unless -x509v1 option of req app is given 
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: David von Oheimb <david.von.oheimb@siemens.com>
(Merged from https://github.com/openssl/openssl/pull/19271)
2023-01-24 15:16:47 +01:00

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/*
* Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (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 <ctype.h>
#include "apps.h"
#include "progs.h"
#include <openssl/core_names.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>
#include <openssl/lhash.h>
#include <openssl/rsa.h>
#ifndef OPENSSL_NO_DSA
# include <openssl/dsa.h>
#endif
#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
#define DEFAULT_DAYS 30 /* default cert validity period in days */
#define UNSET_DAYS -2 /* -1 may be used for testing expiration checks */
#define EXT_COPY_UNSET -1
static int make_REQ(X509_REQ *req, EVP_PKEY *pkey, X509_NAME *fsubj,
int mutlirdn, int attribs, unsigned long chtype);
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 build_data(char *text, const char *def, char *value,
int n_min, int n_max, char *buf, const int buf_size,
const char *desc1, const char *desc2);
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,
char **pkeytype, long *pkeylen,
ENGINE *keygen_engine);
static const char *section = "req";
static CONF *req_conf = NULL;
static CONF *addext_conf = NULL;
static int batch = 0;
typedef enum OPTION_choice {
OPT_COMMON,
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_VFYOPT, OPT_BATCH, OPT_NEWHDR, OPT_MODULUS,
OPT_VERIFY, OPT_NOENC, OPT_NODES, OPT_NOOUT, OPT_VERBOSE, OPT_UTF8,
OPT_NAMEOPT, OPT_REQOPT, OPT_SUBJ, OPT_SUBJECT, OPT_TEXT,
OPT_X509, OPT_X509V1, OPT_CA, OPT_CAKEY,
OPT_MULTIVALUE_RDN, OPT_DAYS, OPT_SET_SERIAL,
OPT_COPY_EXTENSIONS, OPT_EXTENSIONS, OPT_REQEXTS, OPT_ADDEXT,
OPT_PRECERT, OPT_MD,
OPT_SECTION,
OPT_R_ENUM, OPT_PROV_ENUM
} OPTION_CHOICE;
const OPTIONS req_options[] = {
OPT_SECTION("General"),
{"help", OPT_HELP, '-', "Display this summary"},
#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
{"in", OPT_IN, '<', "X.509 request input file (default stdin)"},
{"inform", OPT_INFORM, 'F',
"CSR input format to use (PEM or DER; by default try PEM first)"},
{"verify", OPT_VERIFY, '-', "Verify self-signature on the request"},
OPT_SECTION("Certificate"),
{"new", OPT_NEW, '-', "New request"},
{"config", OPT_CONFIG, '<', "Request template file"},
{"section", OPT_SECTION, 's', "Config section to use (default \"req\")"},
{"utf8", OPT_UTF8, '-', "Input characters are UTF8 (default ASCII)"},
{"nameopt", OPT_NAMEOPT, 's', "Certificate subject/issuer name printing options"},
{"reqopt", OPT_REQOPT, 's', "Various request text options"},
{"text", OPT_TEXT, '-', "Text form of request"},
{"x509", OPT_X509, '-',
"Output an X.509 certificate structure instead of a cert request"},
{"x509v1", OPT_X509V1, '-', "Request cert generation with X.509 version 1"},
{"CA", OPT_CA, '<', "Issuer cert to use for signing a cert, implies -x509"},
{"CAkey", OPT_CAKEY, 's',
"Issuer private key to use with -CA; default is -CA arg"},
{OPT_MORE_STR, 1, 1, "(Required by some CA's)"},
{"subj", OPT_SUBJ, 's', "Set or modify subject of request or cert"},
{"subject", OPT_SUBJECT, '-',
"Print the subject of the output request or cert"},
{"multivalue-rdn", OPT_MULTIVALUE_RDN, '-',
"Deprecated; multi-valued RDNs support is always on."},
{"days", OPT_DAYS, 'p', "Number of days cert is valid for"},
{"set_serial", OPT_SET_SERIAL, 's', "Serial number to use"},
{"copy_extensions", OPT_COPY_EXTENSIONS, 's',
"copy extensions from request when using -x509"},
{"extensions", OPT_EXTENSIONS, 's',
"Cert or request extension section (override value in config file)"},
{"reqexts", OPT_REQEXTS, 's', "An alias for -extensions"},
{"addext", OPT_ADDEXT, 's',
"Additional cert extension key=value pair (may be given more than once)"},
{"precert", OPT_PRECERT, '-', "Add a poison extension to generated cert (implies -new)"},
OPT_SECTION("Keys and Signing"),
{"key", OPT_KEY, 's', "Key for signing, and to include unless -in given"},
{"keyform", OPT_KEYFORM, 'f', "Key file format (ENGINE, other values ignored)"},
{"pubkey", OPT_PUBKEY, '-', "Output public key"},
{"keyout", OPT_KEYOUT, '>', "File to write private key to"},
{"passin", OPT_PASSIN, 's', "Private key and certificate password source"},
{"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
{"newkey", OPT_NEWKEY, 's',
"Generate new key with [<alg>:]<nbits> or <alg>[:<file>] or param:<file>"},
{"pkeyopt", OPT_PKEYOPT, 's', "Public key options as opt:value"},
{"sigopt", OPT_SIGOPT, 's', "Signature parameter in n:v form"},
{"vfyopt", OPT_VFYOPT, 's', "Verification parameter in n:v form"},
{"", OPT_MD, '-', "Any supported digest"},
OPT_SECTION("Output"),
{"out", OPT_OUT, '>', "Output file"},
{"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
{"batch", OPT_BATCH, '-',
"Do not ask anything during request generation"},
{"verbose", OPT_VERBOSE, '-', "Verbose output"},
{"noenc", OPT_NOENC, '-', "Don't encrypt private keys"},
{"nodes", OPT_NODES, '-', "Don't encrypt private keys; deprecated"},
{"noout", OPT_NOOUT, '-', "Do not output REQ"},
{"newhdr", OPT_NEWHDR, '-', "Output \"NEW\" in the header lines"},
{"modulus", OPT_MODULUS, '-', "RSA modulus"},
OPT_R_OPTIONS,
OPT_PROV_OPTIONS,
{NULL}
};
/*
* An LHASH of strings, where each string is an extension name.
*/
static unsigned long ext_name_hash(const OPENSSL_STRING *a)
{
return OPENSSL_LH_strhash((const char *)a);
}
static int ext_name_cmp(const OPENSSL_STRING *a, const OPENSSL_STRING *b)
{
return strcmp((const char *)a, (const char *)b);
}
static void exts_cleanup(OPENSSL_STRING *x)
{
OPENSSL_free((char *)x);
}
/*
* Is the |kv| key already duplicated?
* Return 0 if unique, -1 on runtime error, -2 on syntax error; 1 if found.
*/
static int duplicated(LHASH_OF(OPENSSL_STRING) *addexts, char *kv)
{
char *p;
size_t off;
/* Check syntax. */
/* Skip leading whitespace, make a copy. */
while (isspace(*kv))
kv++;
if ((p = strchr(kv, '=')) == NULL) {
BIO_printf(bio_err, "Parse error on -addext: missing '='\n");
return -2;
}
off = p - kv;
if ((kv = OPENSSL_strdup(kv)) == NULL)
return -1;
/* Skip trailing space before the equal sign. */
for (p = kv + off; p > kv; --p)
if (!isspace(p[-1]))
break;
if (p == kv) {
BIO_printf(bio_err, "Parse error on -addext: missing key\n");
OPENSSL_free(kv);
return -2;
}
*p = '\0';
/* Finally have a clean "key"; see if it's there [by attempt to add it]. */
p = (char *)lh_OPENSSL_STRING_insert(addexts, (OPENSSL_STRING *)kv);
if (p != NULL) {
BIO_printf(bio_err, "Duplicate extension name: %s\n", kv);
OPENSSL_free(p);
return 1;
} else if (lh_OPENSSL_STRING_error(addexts)) {
OPENSSL_free(kv);
return -1;
}
return 0;
}
int req_main(int argc, char **argv)
{
ASN1_INTEGER *serial = NULL;
BIO *out = NULL;
ENGINE *e = NULL, *gen_eng = NULL;
EVP_PKEY *pkey = NULL, *CAkey = NULL;
EVP_PKEY_CTX *genctx = NULL;
STACK_OF(OPENSSL_STRING) *pkeyopts = NULL, *sigopts = NULL, *vfyopts = NULL;
LHASH_OF(OPENSSL_STRING) *addexts = NULL;
X509 *new_x509 = NULL, *CAcert = NULL;
X509_REQ *req = NULL;
EVP_CIPHER *cipher = NULL;
int ext_copy = EXT_COPY_UNSET;
BIO *addext_bio = NULL;
char *extsect = NULL;
const char *infile = NULL, *CAfile = NULL, *CAkeyfile = NULL;
char *outfile = NULL, *keyfile = NULL, *digest = NULL;
char *keyalgstr = NULL, *p, *prog, *passargin = NULL, *passargout = NULL;
char *passin = NULL, *passout = NULL;
char *nofree_passin = NULL, *nofree_passout = NULL;
char *subj = NULL;
X509_NAME *fsubj = NULL;
char *template = default_config_file, *keyout = NULL;
const char *keyalg = NULL;
OPTION_CHOICE o;
int days = UNSET_DAYS;
int ret = 1, gen_x509 = 0, i = 0, newreq = 0, verbose = 0;
int informat = FORMAT_UNDEF, outformat = FORMAT_PEM, keyform = FORMAT_UNDEF;
int modulus = 0, multirdn = 1, verify = 0, noout = 0, text = 0;
int noenc = 0, newhdr = 0, subject = 0, pubkey = 0, precert = 0, x509v1 = 0;
long newkey_len = -1;
unsigned long chtype = MBSTRING_ASC, reqflag = 0;
#ifndef OPENSSL_NO_DES
cipher = (EVP_CIPHER *)EVP_des_ede3_cbc();
#endif
opt_set_unknown_name("digest");
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 = setup_engine(opt_arg(), 0);
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_SECTION:
section = 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_PROV_CASES:
if (!opt_provider(o))
goto end;
break;
case OPT_NEWKEY:
keyalg = opt_arg();
newreq = 1;
break;
case OPT_PKEYOPT:
if (pkeyopts == NULL)
pkeyopts = sk_OPENSSL_STRING_new_null();
if (pkeyopts == NULL
|| !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_VFYOPT:
if (!vfyopts)
vfyopts = sk_OPENSSL_STRING_new_null();
if (!vfyopts || !sk_OPENSSL_STRING_push(vfyopts, 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:
case OPT_NOENC:
noenc = 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_X509V1:
x509v1 = 1;
/* fall thru */
case OPT_X509:
gen_x509 = 1;
break;
case OPT_CA:
CAfile = opt_arg();
gen_x509 = 1;
break;
case OPT_CAKEY:
CAkeyfile = opt_arg();
break;
case OPT_DAYS:
days = atoi(opt_arg());
if (days < -1) {
BIO_printf(bio_err, "%s: -days parameter arg must be >= -1\n",
prog);
goto end;
}
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:
/* obsolete */
break;
case OPT_COPY_EXTENSIONS:
if (!set_ext_copy(&ext_copy, opt_arg())) {
BIO_printf(bio_err, "Invalid extension copy option: \"%s\"\n",
opt_arg());
goto end;
}
break;
case OPT_EXTENSIONS:
case OPT_REQEXTS:
extsect = opt_arg();
break;
case OPT_ADDEXT:
p = opt_arg();
if (addexts == NULL) {
addexts = lh_OPENSSL_STRING_new(ext_name_hash, ext_name_cmp);
addext_bio = BIO_new(BIO_s_mem());
if (addexts == NULL || addext_bio == NULL)
goto end;
}
i = duplicated(addexts, p);
if (i == 1)
goto opthelp;
if (i == -1)
BIO_printf(bio_err, "Internal error handling -addext %s\n", p);
if (i < 0 || BIO_printf(addext_bio, "%s\n", p) < 0)
goto end;
break;
case OPT_PRECERT:
newreq = precert = 1;
break;
case OPT_MD:
digest = opt_unknown();
break;
}
}
/* No extra arguments. */
if (!opt_check_rest_arg(NULL))
goto opthelp;
if (!app_RAND_load())
goto end;
if (!gen_x509) {
if (days != UNSET_DAYS)
BIO_printf(bio_err, "Ignoring -days without -x509; not generating a certificate\n");
if (ext_copy == EXT_COPY_NONE)
BIO_printf(bio_err, "Ignoring -copy_extensions 'none' when -x509 is not given\n");
}
if (infile == NULL) {
if (gen_x509)
newreq = 1;
else if (!newreq)
BIO_printf(bio_err,
"Warning: Will read cert request from stdin since no -in option is given\n");
}
if (!app_passwd(passargin, passargout, &passin, &passout)) {
BIO_printf(bio_err, "Error getting passwords\n");
goto end;
}
if ((req_conf = app_load_config_verbose(template, verbose)) == NULL)
goto end;
if (addext_bio != NULL) {
if (verbose)
BIO_printf(bio_err,
"Using additional configuration from -addext options\n");
if ((addext_conf = app_load_config_bio(addext_bio, NULL)) == NULL)
goto end;
}
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 = BIO_new_file(p, "r");
if (oid_bio == NULL) {
if (verbose)
BIO_printf(bio_err,
"Problems opening '%s' for extra OIDs\n", p);
} else {
OBJ_create_objects(oid_bio);
BIO_free(oid_bio);
}
}
}
if (!add_oid_section(req_conf))
goto end;
/* Check that any specified digest is fetchable */
if (digest != NULL) {
if (!opt_check_md(digest))
goto opthelp;
} else {
/* No digest specified, default to configuration */
p = NCONF_get_string(req_conf, section, "default_md");
if (p == NULL)
ERR_clear_error();
else
digest = p;
}
if (extsect == NULL) {
extsect = NCONF_get_string(req_conf, section,
gen_x509 ? V3_EXTENSIONS : REQ_EXTENSIONS);
if (extsect == NULL)
ERR_clear_error();
}
if (extsect != NULL) {
/* Check syntax of extension section in config file */
X509V3_CTX ctx;
X509V3_set_ctx_test(&ctx);
X509V3_set_nconf(&ctx, req_conf);
if (!X509V3_EXT_add_nconf(req_conf, &ctx, extsect, NULL)) {
BIO_printf(bio_err,
"Error checking %s extension section %s\n",
gen_x509 ? "x509" : "request", extsect);
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 checking extensions defined using -addext\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 (keyfile != NULL) {
pkey = load_key(keyfile, keyform, 0, passin, e, "private key");
if (pkey == NULL)
goto end;
app_RAND_load_conf(req_conf, section);
}
if (keyalg != NULL && pkey != NULL) {
BIO_printf(bio_err,
"Warning: Not generating key via given -newkey option since -key is given\n");
/* Better throw an error in this case */
}
if (newreq && pkey == NULL) {
app_RAND_load_conf(req_conf, section);
if (!NCONF_get_number(req_conf, section, BITS, &newkey_len))
newkey_len = DEFAULT_KEY_LENGTH;
genctx = set_keygen_ctx(keyalg, &keyalgstr, &newkey_len, gen_eng);
if (genctx == NULL)
goto end;
if (newkey_len < MIN_KEY_LENGTH
&& (EVP_PKEY_CTX_is_a(genctx, "RSA")
|| EVP_PKEY_CTX_is_a(genctx, "RSA-PSS")
|| EVP_PKEY_CTX_is_a(genctx, "DSA"))) {
BIO_printf(bio_err, "Private key length too short, needs to be at least %d bits, not %ld.\n",
MIN_KEY_LENGTH, newkey_len);
goto end;
}
if (newkey_len > OPENSSL_RSA_MAX_MODULUS_BITS
&& (EVP_PKEY_CTX_is_a(genctx, "RSA")
|| EVP_PKEY_CTX_is_a(genctx, "RSA-PSS")))
BIO_printf(bio_err,
"Warning: It is not recommended to use more than %d bit for RSA keys.\n"
" Your key size is %ld! Larger key size may behave not as expected.\n",
OPENSSL_RSA_MAX_MODULUS_BITS, newkey_len);
#ifndef OPENSSL_NO_DSA
if (EVP_PKEY_CTX_is_a(genctx, "DSA")
&& newkey_len > OPENSSL_DSA_MAX_MODULUS_BITS)
BIO_printf(bio_err,
"Warning: It is not recommended to use more than %d bit for DSA keys.\n"
" Your key size is %ld! Larger key size may behave not as expected.\n",
OPENSSL_DSA_MAX_MODULUS_BITS, newkey_len);
#endif
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, "Key parameter error \"%s\"\n", genopt);
goto end;
}
}
}
EVP_PKEY_CTX_set_cb(genctx, progress_cb);
EVP_PKEY_CTX_set_app_data(genctx, bio_err);
pkey = app_keygen(genctx, keyalgstr, newkey_len, verbose);
EVP_PKEY_CTX_free(genctx);
genctx = NULL;
}
if (keyout == NULL && keyfile == NULL) {
keyout = NCONF_get_string(req_conf, section, KEYFILE);
if (keyout == NULL)
ERR_clear_error();
}
if (pkey != NULL && (keyfile == NULL || keyout != NULL)) {
if (verbose) {
BIO_printf(bio_err, "Writing private key to ");
if (keyout == NULL)
BIO_printf(bio_err, "stdout\n");
else
BIO_printf(bio_err, "'%s'\n", keyout);
}
out = bio_open_owner(keyout, outformat, newreq);
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 (noenc)
cipher = NULL;
i = 0;
loop:
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");
}
/*
* subj is expected to be in the format /type0=value0/type1=value1/type2=...
* where characters may be escaped by \
*/
if (subj != NULL
&& (fsubj = parse_name(subj, chtype, multirdn, "subject")) == NULL)
goto end;
if (!newreq) {
if (keyfile != NULL)
BIO_printf(bio_err,
"Warning: Not placing -key in cert or request since request is used\n");
req = load_csr_autofmt(infile /* if NULL, reads from stdin */,
informat, "X509 request");
if (req == NULL)
goto end;
} else if (infile != NULL) {
BIO_printf(bio_err,
"Warning: Ignoring -in option since -new or -newkey or -precert is given\n");
/* Better throw an error in this case, as done in the x509 app */
}
if (CAkeyfile == NULL)
CAkeyfile = CAfile;
if (CAkeyfile != NULL) {
if (CAfile == NULL) {
BIO_printf(bio_err,
"Warning: Ignoring -CAkey option since no -CA option is given\n");
} else {
if ((CAkey = load_key(CAkeyfile, FORMAT_UNDEF,
0, passin, e,
CAkeyfile != CAfile
? "issuer private key from -CAkey arg"
: "issuer private key from -CA arg")) == NULL)
goto end;
}
}
if (CAfile != NULL) {
if ((CAcert = load_cert_pass(CAfile, FORMAT_UNDEF, 1, passin,
"issuer cert from -CA arg")) == NULL)
goto end;
if (!X509_check_private_key(CAcert, CAkey)) {
BIO_printf(bio_err,
"Issuer CA certificate and key do not match\n");
goto end;
}
}
if (newreq || gen_x509) {
if (CAcert == NULL && pkey == NULL) {
BIO_printf(bio_err, "Must provide a signature key using -key or"
" provide -CA / -CAkey\n");
goto end;
}
if (req == NULL) {
req = X509_REQ_new_ex(app_get0_libctx(), app_get0_propq());
if (req == NULL) {
goto end;
}
if (!make_REQ(req, pkey, fsubj, multirdn, !gen_x509, chtype)) {
BIO_printf(bio_err, "Error making certificate request\n");
goto end;
}
/* Note that -x509 can take over -key and -subj option values. */
}
if (gen_x509) {
EVP_PKEY *pub_key = X509_REQ_get0_pubkey(req);
EVP_PKEY *issuer_key = CAcert != NULL ? CAkey : pkey;
X509V3_CTX ext_ctx;
X509_NAME *issuer = CAcert != NULL ? X509_get_subject_name(CAcert) :
X509_REQ_get_subject_name(req);
X509_NAME *n_subj = fsubj != NULL ? fsubj :
X509_REQ_get_subject_name(req);
if (CAcert != NULL && keyfile != NULL)
BIO_printf(bio_err,
"Warning: Not using -key or -newkey for signing since -CA option is given\n");
if ((new_x509 = X509_new_ex(app_get0_libctx(),
app_get0_propq())) == NULL)
goto end;
if (serial != NULL) {
if (!X509_set_serialNumber(new_x509, serial))
goto end;
} else {
if (!rand_serial(NULL, X509_get_serialNumber(new_x509)))
goto end;
}
if (!X509_set_issuer_name(new_x509, issuer))
goto end;
if (days == UNSET_DAYS) {
days = DEFAULT_DAYS;
}
if (!set_cert_times(new_x509, NULL, NULL, days))
goto end;
if (!X509_set_subject_name(new_x509, n_subj))
goto end;
if (!pub_key || !X509_set_pubkey(new_x509, pub_key))
goto end;
if (ext_copy == EXT_COPY_UNSET) {
if (infile != NULL)
BIO_printf(bio_err, "Warning: No -copy_extensions given; ignoring any extensions in the request\n");
} else if (!copy_extensions(new_x509, req, ext_copy)) {
BIO_printf(bio_err, "Error copying extensions from request\n");
goto end;
}
/* Set up V3 context struct */
X509V3_set_ctx(&ext_ctx, CAcert != NULL ? CAcert : new_x509,
new_x509, NULL, NULL, X509V3_CTX_REPLACE);
/* prepare fallback for AKID, but only if issuer cert == new_x509 */
if (CAcert == NULL) {
if (!X509V3_set_issuer_pkey(&ext_ctx, issuer_key))
goto end;
if (!cert_matches_key(new_x509, issuer_key))
BIO_printf(bio_err,
"Warning: Signature key and public key of cert do not match\n");
}
X509V3_set_nconf(&ext_ctx, req_conf);
/* Add extensions */
if (extsect != NULL
&& !X509V3_EXT_add_nconf(req_conf, &ext_ctx, extsect, new_x509)) {
BIO_printf(bio_err, "Error adding x509 extensions from section %s\n",
extsect);
goto end;
}
if (addext_conf != NULL
&& !X509V3_EXT_add_nconf(addext_conf, &ext_ctx, "default",
new_x509)) {
BIO_printf(bio_err, "Error adding x509 extensions defined via -addext\n");
goto end;
}
/* If a pre-cert was requested, we need to add a poison extension */
if (precert) {
if (X509_add1_ext_i2d(new_x509, NID_ct_precert_poison,
NULL, 1, 0) != 1) {
BIO_printf(bio_err, "Error adding poison extension\n");
goto end;
}
}
i = do_X509_sign(new_x509, x509v1, issuer_key, digest, sigopts,
&ext_ctx);
if (!i)
goto end;
} else {
X509V3_CTX ext_ctx;
if (precert) {
BIO_printf(bio_err,
"Warning: Ignoring -precert flag since no cert is produced\n");
}
/* Set up V3 context struct */
X509V3_set_ctx(&ext_ctx, NULL, NULL, req, NULL, X509V3_CTX_REPLACE);
X509V3_set_nconf(&ext_ctx, req_conf);
/* Add extensions */
if (extsect != NULL
&& !X509V3_EXT_REQ_add_nconf(req_conf, &ext_ctx, extsect, req)) {
BIO_printf(bio_err, "Error adding request extensions from section %s\n",
extsect);
goto end;
}
if (addext_conf != NULL
&& !X509V3_EXT_REQ_add_nconf(addext_conf, &ext_ctx, "default",
req)) {
BIO_printf(bio_err, "Error adding request extensions defined via -addext\n");
goto end;
}
i = do_X509_REQ_sign(req, pkey, digest, sigopts);
if (!i)
goto end;
}
}
if (subj != NULL && !newreq && !gen_x509) {
if (verbose) {
BIO_printf(out, "Modifying subject of certificate request\n");
print_name(out, "Old subject=", X509_REQ_get_subject_name(req));
}
if (!X509_REQ_set_subject_name(req, fsubj)) {
BIO_printf(bio_err, "Error modifying subject of certificate request\n");
goto end;
}
if (verbose) {
print_name(out, "New subject=", X509_REQ_get_subject_name(req));
}
}
if (verify) {
EVP_PKEY *tpubkey = pkey;
if (tpubkey == NULL) {
tpubkey = X509_REQ_get0_pubkey(req);
if (tpubkey == NULL)
goto end;
}
i = do_X509_REQ_verify(req, tpubkey, vfyopts);
if (i < 0)
goto end;
if (i == 0)
BIO_printf(bio_err, "Certificate request self-signature verify failure\n");
else /* i > 0 */
BIO_printf(bio_err, "Certificate request self-signature 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");
goto end;
}
PEM_write_bio_PUBKEY(out, tpubkey);
}
if (text) {
if (gen_x509)
ret = X509_print_ex(out, new_x509, get_nameopt(), reqflag);
else
ret = X509_REQ_print_ex(out, req, get_nameopt(), reqflag);
if (ret == 0) {
if (gen_x509)
BIO_printf(bio_err, "Error printing certificate\n");
else
BIO_printf(bio_err, "Error printing certificate request\n");
goto end;
}
}
if (subject) {
print_name(out, "subject=", gen_x509
? X509_get_subject_name(new_x509)
: X509_REQ_get_subject_name(req));
}
if (modulus) {
EVP_PKEY *tpubkey;
if (gen_x509)
tpubkey = X509_get0_pubkey(new_x509);
else
tpubkey = X509_REQ_get0_pubkey(req);
if (tpubkey == NULL) {
fprintf(stdout, "Modulus is unavailable\n");
goto end;
}
fprintf(stdout, "Modulus=");
if (EVP_PKEY_is_a(tpubkey, "RSA") || EVP_PKEY_is_a(tpubkey, "RSA-PSS")) {
BIGNUM *n = NULL;
if (!EVP_PKEY_get_bn_param(tpubkey, "n", &n))
goto end;
BN_print(out, n);
BN_free(n);
} else {
fprintf(stdout, "Wrong Algorithm type");
}
fprintf(stdout, "\n");
}
if (!noout && !gen_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 certificate request\n");
goto end;
}
}
if (!noout && gen_x509 && new_x509 != NULL) {
if (outformat == FORMAT_ASN1)
i = i2d_X509_bio(out, new_x509);
else
i = PEM_write_bio_X509(out, new_x509);
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);
NCONF_free(addext_conf);
BIO_free(addext_bio);
BIO_free_all(out);
EVP_PKEY_free(pkey);
EVP_PKEY_CTX_free(genctx);
sk_OPENSSL_STRING_free(pkeyopts);
sk_OPENSSL_STRING_free(sigopts);
sk_OPENSSL_STRING_free(vfyopts);
lh_OPENSSL_STRING_doall(addexts, exts_cleanup);
lh_OPENSSL_STRING_free(addexts);
#ifndef OPENSSL_NO_ENGINE
release_engine(gen_eng);
#endif
OPENSSL_free(keyalgstr);
X509_REQ_free(req);
X509_NAME_free(fsubj);
X509_free(new_x509);
X509_free(CAcert);
EVP_PKEY_free(CAkey);
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, X509_NAME *fsubj,
int multirdn, int attribs, unsigned long chtype)
{
int ret = 0, i;
char no_prompt = 0;
STACK_OF(CONF_VALUE) *dn_sk = NULL, *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) {
ERR_clear_error();
} else {
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();
} 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;
}
}
/* so far there is only version 1 */
if (!X509_REQ_set_version(req, X509_REQ_VERSION_1))
goto err;
if (fsubj != NULL)
i = X509_REQ_set_subject_name(req, fsubj);
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;
}
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 = 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 ret = 0;
char buf[1024];
ret = build_data(text, def, value, n_min, n_max, buf, sizeof(buf),
"DN value", "DN default");
if ((ret == 0) || (ret == 1))
return ret;
ret = 1;
if (!X509_NAME_add_entry_by_NID(n, nid, chtype,
(unsigned char *)buf, -1, -1, mval))
ret = 0;
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 ret = 0;
char buf[1024];
ret = build_data(text, def, value, n_min, n_max, buf, sizeof(buf),
"Attribute value", "Attribute default");
if ((ret == 0) || (ret == 1))
return ret;
ret = 1;
if (!X509_REQ_add1_attr_by_NID(req, nid, chtype,
(unsigned char *)buf, -1)) {
BIO_printf(bio_err, "Error adding attribute\n");
ret = 0;
}
return ret;
}
static int build_data(char *text, const char *def, char *value,
int n_min, int n_max, char *buf, const int buf_size,
const char *desc1, const char *desc2)
{
int i;
start:
if (!batch)
BIO_printf(bio_err, "%s [%s]:", text, def);
(void)BIO_flush(bio_err);
if (value != NULL) {
if (!join(buf, buf_size, value, "\n", desc1))
return 0;
BIO_printf(bio_err, "%s\n", value);
} else {
buf[0] = '\0';
if (!batch) {
if (!fgets(buf, buf_size, 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, buf_size, def, "\n", desc2))
return 0;
} else if ((buf[0] == '.') && (buf[1] == '\n')) {
return 1;
}
i = strlen(buf);
if (buf[i - 1] != '\n') {
BIO_printf(bio_err, "Missing newline at end of 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;
}
return 2;
}
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 too short, must be at least %d bytes long\n", n_min);
return 0;
}
if (n_max >= 0 && len > n_max) {
BIO_printf(bio_err,
"String too long, must be at most %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,
char **pkeytype, long *pkeylen,
ENGINE *keygen_engine)
{
EVP_PKEY_CTX *gctx = NULL;
EVP_PKEY *param = NULL;
long keylen = -1;
BIO *pbio = NULL;
const char *keytype = NULL;
size_t keytypelen = 0;
int expect_paramfile = 0;
const char *paramfile = NULL;
/* Treat the first part of gstr, and only that */
if (gstr == NULL) {
/*
* Special case: when no string given, default to RSA and the
* key length given by |*pkeylen|.
*/
keytype = "RSA";
keylen = *pkeylen;
} else if (gstr[0] >= '0' && gstr[0] <= '9') {
/* Special case: only keylength given from string, so default to RSA */
keytype = "RSA";
/* The second part treatment will do the rest */
} else {
const char *p = strchr(gstr, ':');
int len;
if (p != NULL)
len = p - gstr;
else
len = strlen(gstr);
if (strncmp(gstr, "param", len) == 0) {
expect_paramfile = 1;
if (p == NULL) {
BIO_printf(bio_err,
"Parameter file requested but no path given: %s\n",
gstr);
return NULL;
}
} else {
keytype = gstr;
keytypelen = len;
}
if (p != NULL)
gstr = gstr + len + 1;
else
gstr = NULL;
}
/* Treat the second part of gstr, if there is one */
if (gstr != NULL) {
/* If the second part starts with a digit, we assume it's a size */
if (!expect_paramfile && gstr[0] >= '0' && gstr[0] <= '9')
keylen = atol(gstr);
else
paramfile = gstr;
}
if (paramfile != NULL) {
pbio = BIO_new_file(paramfile, "r");
if (pbio == NULL) {
BIO_printf(bio_err, "Cannot 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 (keytype == NULL) {
keytype = EVP_PKEY_get0_type_name(param);
if (keytype == NULL) {
EVP_PKEY_free(param);
BIO_puts(bio_err, "Unable to determine key type\n");
return NULL;
}
}
}
if (keytypelen > 0)
*pkeytype = OPENSSL_strndup(keytype, keytypelen);
else
*pkeytype = OPENSSL_strdup(keytype);
if (*pkeytype == NULL) {
BIO_printf(bio_err, "Out of memory\n");
EVP_PKEY_free(param);
return NULL;
}
if (keylen >= 0)
*pkeylen = keylen;
if (param != NULL) {
if (!EVP_PKEY_is_a(param, *pkeytype)) {
BIO_printf(bio_err, "Key type does not match parameters\n");
EVP_PKEY_free(param);
return NULL;
}
if (keygen_engine != NULL)
gctx = EVP_PKEY_CTX_new(param, keygen_engine);
else
gctx = EVP_PKEY_CTX_new_from_pkey(app_get0_libctx(),
param, app_get0_propq());
*pkeylen = EVP_PKEY_get_bits(param);
EVP_PKEY_free(param);
} else {
if (keygen_engine != NULL) {
int pkey_id = get_legacy_pkey_id(app_get0_libctx(), *pkeytype,
keygen_engine);
if (pkey_id != NID_undef)
gctx = EVP_PKEY_CTX_new_id(pkey_id, keygen_engine);
} else {
gctx = EVP_PKEY_CTX_new_from_name(app_get0_libctx(),
*pkeytype, app_get0_propq());
}
}
if (gctx == NULL) {
BIO_puts(bio_err, "Error allocating keygen context\n");
return NULL;
}
if (EVP_PKEY_keygen_init(gctx) <= 0) {
BIO_puts(bio_err, "Error initializing keygen context\n");
EVP_PKEY_CTX_free(gctx);
return NULL;
}
if (keylen == -1 && (EVP_PKEY_CTX_is_a(gctx, "RSA")
|| EVP_PKEY_CTX_is_a(gctx, "RSA-PSS")))
keylen = *pkeylen;
if (keylen != -1) {
OSSL_PARAM params[] = { OSSL_PARAM_END, OSSL_PARAM_END };
size_t bits = keylen;
params[0] =
OSSL_PARAM_construct_size_t(OSSL_PKEY_PARAM_BITS, &bits);
if (EVP_PKEY_CTX_set_params(gctx, params) <= 0) {
BIO_puts(bio_err, "Error setting keysize\n");
EVP_PKEY_CTX_free(gctx);
return NULL;
}
}
return gctx;
}
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