#include <openssl/opensslconf.h>
#ifndef OPENSSL_NO_EC
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/bn.h>
#include <openssl/ec.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/x509.h>
static struct {
int asn1_flag;
int check;
char *curve_name;
point_conversion_form_t form;
int genkey;
char *infile;
int informat;
int list_curves;
int new_asn1_flag;
int new_form;
int no_seed;
int noout;
char *outfile;
int outformat;
int text;
} cfg;
static int
ecparam_opt_form(char *arg)
{
if (strcmp(arg, "compressed") == 0)
cfg.form = POINT_CONVERSION_COMPRESSED;
else if (strcmp(arg, "uncompressed") == 0)
cfg.form = POINT_CONVERSION_UNCOMPRESSED;
else if (strcmp(arg, "hybrid") == 0)
cfg.form = POINT_CONVERSION_HYBRID;
else
return (1);
cfg.new_form = 1;
return (0);
}
static int
ecparam_opt_enctype(char *arg)
{
if (strcmp(arg, "explicit") == 0)
cfg.asn1_flag = 0;
else if (strcmp(arg, "named_curve") == 0)
cfg.asn1_flag = OPENSSL_EC_NAMED_CURVE;
else
return (1);
cfg.new_asn1_flag = 1;
return (0);
}
static const struct option ecparam_options[] = {
{
.name = "check",
.desc = "Validate the elliptic curve parameters",
.type = OPTION_FLAG,
.opt.flag = &cfg.check,
},
{
.name = "conv_form",
.argname = "form",
.desc = "Specify point conversion form:\n"
" compressed, uncompressed (default), hybrid",
.type = OPTION_ARG_FUNC,
.opt.argfunc = ecparam_opt_form,
},
{
.name = "genkey",
.desc = "Generate an EC private key using the specified "
"parameters",
.type = OPTION_FLAG,
.opt.flag = &cfg.genkey,
},
{
.name = "in",
.argname = "file",
.desc = "Input file to read parameters from (default stdin)",
.type = OPTION_ARG,
.opt.arg = &cfg.infile,
},
{
.name = "inform",
.argname = "format",
.desc = "Input format (DER or PEM)",
.type = OPTION_ARG_FORMAT,
.opt.value = &cfg.informat,
},
{
.name = "list_curves",
.desc = "Print list of all currently implemented EC "
"parameter names",
.type = OPTION_FLAG,
.opt.flag = &cfg.list_curves,
},
{
.name = "name",
.argname = "curve",
.desc = "Use the EC parameters with the specified name",
.type = OPTION_ARG,
.opt.arg = &cfg.curve_name,
},
{
.name = "no_seed",
.desc = "Do not output seed with explicit parameter encoding",
.type = OPTION_FLAG,
.opt.flag = &cfg.no_seed,
},
{
.name = "noout",
.desc = "Do not output encoded version of EC parameters",
.type = OPTION_FLAG,
.opt.flag = &cfg.noout,
},
{
.name = "out",
.argname = "file",
.desc = "Output file to write parameters to (default stdout)",
.type = OPTION_ARG,
.opt.arg = &cfg.outfile,
},
{
.name = "outform",
.argname = "format",
.desc = "Output format (DER or PEM)",
.type = OPTION_ARG_FORMAT,
.opt.value = &cfg.outformat,
},
{
.name = "param_enc",
.argname = "type",
.desc = "Specify EC parameter ASN.1 encoding type:\n"
" explicit, named_curve (default)",
.type = OPTION_ARG_FUNC,
.opt.argfunc = ecparam_opt_enctype,
},
{
.name = "text",
.desc = "Print out the EC parameters in human readable form",
.type = OPTION_FLAG,
.opt.flag = &cfg.text,
},
{NULL},
};
static void
ecparam_usage(void)
{
fprintf(stderr, "usage: ecparam [-check] [-conv_form arg] "
" [-genkey]\n"
" [-in file] [-inform DER | PEM] [-list_curves] [-name arg]\n"
" [-no_seed] [-noout] [-out file] [-outform DER | PEM]\n"
" [-param_enc arg] [-text]\n\n");
options_usage(ecparam_options);
}
int
ecparam_main(int argc, char **argv)
{
EC_GROUP *group = NULL;
BIO *in = NULL, *out = NULL;
int i, ret = 1;
if (pledge("stdio cpath wpath rpath", NULL) == -1) {
perror("pledge");
exit(1);
}
memset(&cfg, 0, sizeof(cfg));
cfg.asn1_flag = OPENSSL_EC_NAMED_CURVE;
cfg.form = POINT_CONVERSION_UNCOMPRESSED;
cfg.informat = FORMAT_PEM;
cfg.outformat = FORMAT_PEM;
if (options_parse(argc, argv, ecparam_options, NULL, NULL) != 0) {
ecparam_usage();
goto end;
}
in = BIO_new(BIO_s_file());
out = BIO_new(BIO_s_file());
if ((in == NULL) || (out == NULL)) {
ERR_print_errors(bio_err);
goto end;
}
if (cfg.infile == NULL)
BIO_set_fp(in, stdin, BIO_NOCLOSE);
else {
if (BIO_read_filename(in, cfg.infile) <= 0) {
perror(cfg.infile);
goto end;
}
}
if (cfg.outfile == NULL) {
BIO_set_fp(out, stdout, BIO_NOCLOSE);
} else {
if (BIO_write_filename(out, cfg.outfile) <= 0) {
perror(cfg.outfile);
goto end;
}
}
if (cfg.list_curves) {
EC_builtin_curve *curves = NULL;
size_t crv_len = 0;
size_t n = 0;
crv_len = EC_get_builtin_curves(NULL, 0);
curves = reallocarray(NULL, crv_len, sizeof(EC_builtin_curve));
if (curves == NULL)
goto end;
if (!EC_get_builtin_curves(curves, crv_len)) {
free(curves);
goto end;
}
for (n = 0; n < crv_len; n++) {
const char *comment;
const char *sname;
comment = curves[n].comment;
sname = OBJ_nid2sn(curves[n].nid);
if (comment == NULL)
comment = "CURVE DESCRIPTION NOT AVAILABLE";
if (sname == NULL)
sname = "";
BIO_printf(out, " %-10s: ", sname);
BIO_printf(out, "%s\n", comment);
}
free(curves);
ret = 0;
goto end;
}
if (cfg.curve_name != NULL) {
int nid;
if (!strcmp(cfg.curve_name, "secp192r1")) {
BIO_printf(bio_err, "using curve name prime192v1 "
"instead of secp192r1\n");
nid = NID_X9_62_prime192v1;
} else if (!strcmp(cfg.curve_name, "secp256r1")) {
BIO_printf(bio_err, "using curve name prime256v1 "
"instead of secp256r1\n");
nid = NID_X9_62_prime256v1;
} else
nid = OBJ_sn2nid(cfg.curve_name);
if (nid == 0)
nid = EC_curve_nist2nid(cfg.curve_name);
if (nid == 0) {
BIO_printf(bio_err, "unknown curve name (%s)\n",
cfg.curve_name);
goto end;
}
group = EC_GROUP_new_by_curve_name(nid);
if (group == NULL) {
BIO_printf(bio_err, "unable to create curve (%s)\n",
cfg.curve_name);
goto end;
}
EC_GROUP_set_asn1_flag(group, cfg.asn1_flag);
EC_GROUP_set_point_conversion_form(group, cfg.form);
} else if (cfg.informat == FORMAT_ASN1) {
group = d2i_ECPKParameters_bio(in, NULL);
} else if (cfg.informat == FORMAT_PEM) {
group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);
} else {
BIO_printf(bio_err, "bad input format specified\n");
goto end;
}
if (group == NULL) {
BIO_printf(bio_err,
"unable to load elliptic curve parameters\n");
ERR_print_errors(bio_err);
goto end;
}
if (cfg.new_form)
EC_GROUP_set_point_conversion_form(group, cfg.form);
if (cfg.new_asn1_flag)
EC_GROUP_set_asn1_flag(group, cfg.asn1_flag);
if (cfg.no_seed)
EC_GROUP_set_seed(group, NULL, 0);
if (cfg.text) {
if (!ECPKParameters_print(out, group, 0))
goto end;
}
if (cfg.check) {
BIO_printf(bio_err, "checking elliptic curve parameters: ");
if (!EC_GROUP_check(group, NULL)) {
BIO_printf(bio_err, "failed\n");
ERR_print_errors(bio_err);
} else
BIO_printf(bio_err, "ok\n");
}
if (!cfg.noout) {
if (cfg.outformat == FORMAT_ASN1)
i = i2d_ECPKParameters_bio(out, group);
else if (cfg.outformat == FORMAT_PEM)
i = PEM_write_bio_ECPKParameters(out, group);
else {
BIO_printf(bio_err, "bad output format specified for"
" outfile\n");
goto end;
}
if (!i) {
BIO_printf(bio_err, "unable to write elliptic "
"curve parameters\n");
ERR_print_errors(bio_err);
goto end;
}
}
if (cfg.genkey) {
EC_KEY *eckey = EC_KEY_new();
if (eckey == NULL)
goto end;
if (EC_KEY_set_group(eckey, group) == 0) {
EC_KEY_free(eckey);
goto end;
}
if (!EC_KEY_generate_key(eckey)) {
EC_KEY_free(eckey);
goto end;
}
if (cfg.outformat == FORMAT_ASN1)
i = i2d_ECPrivateKey_bio(out, eckey);
else if (cfg.outformat == FORMAT_PEM)
i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
NULL, 0, NULL, NULL);
else {
BIO_printf(bio_err, "bad output format specified "
"for outfile\n");
EC_KEY_free(eckey);
goto end;
}
EC_KEY_free(eckey);
}
ret = 0;
end:
BIO_free(in);
BIO_free_all(out);
EC_GROUP_free(group);
return (ret);
}
#endif
