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openssl/apps/ecparam.c
Rich Salz 021410ea3f Check non-option arguments 
Make sure all commands check to see if there are any "extra" arguments
after the options, and print an error if so.

Made all error messages consistent (which is to say, minimal).

Fixes: #13527

Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/13563)
2020-12-15 11:47:17 +01:00

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/*
* Copyright 2002-2020 The OpenSSL Project Authors. All Rights Reserved.
* Copyright (c) 2002, Oracle and/or its affiliates. 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 <openssl/opensslconf.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include "apps.h"
#include "progs.h"
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/bn.h>
#include <openssl/ec.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
typedef enum OPTION_choice {
OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_TEXT,
OPT_CHECK, OPT_LIST_CURVES, OPT_NO_SEED, OPT_NOOUT, OPT_NAME,
OPT_CONV_FORM, OPT_PARAM_ENC, OPT_GENKEY, OPT_ENGINE, OPT_CHECK_NAMED,
OPT_R_ENUM, OPT_PROV_ENUM
} OPTION_CHOICE;
const OPTIONS ecparam_options[] = {
OPT_SECTION("General"),
{"help", OPT_HELP, '-', "Display this summary"},
{"list_curves", OPT_LIST_CURVES, '-',
"Prints a list of all curve 'short names'"},
#ifndef OPENSSL_NO_ENGINE
{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
#endif
{"genkey", OPT_GENKEY, '-', "Generate ec key"},
{"in", OPT_IN, '<', "Input file - default stdin"},
{"inform", OPT_INFORM, 'F', "Input format - default PEM (DER or PEM)"},
{"out", OPT_OUT, '>', "Output file - default stdout"},
{"outform", OPT_OUTFORM, 'F', "Output format - default PEM"},
OPT_SECTION("Output"),
{"text", OPT_TEXT, '-', "Print the ec parameters in text form"},
{"noout", OPT_NOOUT, '-', "Do not print the ec parameter"},
{"param_enc", OPT_PARAM_ENC, 's',
"Specifies the way the ec parameters are encoded"},
OPT_SECTION("Parameter"),
{"check", OPT_CHECK, '-', "Validate the ec parameters"},
{"check_named", OPT_CHECK_NAMED, '-',
"Check that named EC curve parameters have not been modified"},
{"no_seed", OPT_NO_SEED, '-',
"If 'explicit' parameters are chosen do not use the seed"},
{"name", OPT_NAME, 's',
"Use the ec parameters with specified 'short name'"},
{"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "},
OPT_R_OPTIONS,
OPT_PROV_OPTIONS,
{NULL}
};
static OPT_PAIR forms[] = {
{"compressed", POINT_CONVERSION_COMPRESSED},
{"uncompressed", POINT_CONVERSION_UNCOMPRESSED},
{"hybrid", POINT_CONVERSION_HYBRID},
{NULL}
};
static OPT_PAIR encodings[] = {
{"named_curve", OPENSSL_EC_NAMED_CURVE},
{"explicit", 0},
{NULL}
};
int ecparam_main(int argc, char **argv)
{
ENGINE *e = NULL;
BIGNUM *ec_gen = NULL, *ec_order = NULL, *ec_cofactor = NULL;
BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL;
BIO *in = NULL, *out = NULL;
EC_GROUP *group = NULL;
point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
char *curve_name = NULL;
char *infile = NULL, *outfile = NULL, *prog;
unsigned char *buffer = NULL;
OPTION_CHOICE o;
int asn1_flag = OPENSSL_EC_NAMED_CURVE, new_asn1_flag = 0;
int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0;
int ret = 1, private = 0;
int list_curves = 0, no_seed = 0, check = 0, new_form = 0;
int text = 0, i, genkey = 0, check_named = 0;
prog = opt_init(argc, argv, ecparam_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(ecparam_options);
ret = 0;
goto end;
case OPT_INFORM:
if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
goto opthelp;
break;
case OPT_IN:
infile = opt_arg();
break;
case OPT_OUTFORM:
if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
goto opthelp;
break;
case OPT_OUT:
outfile = opt_arg();
break;
case OPT_TEXT:
text = 1;
break;
case OPT_CHECK:
check = 1;
break;
case OPT_CHECK_NAMED:
check_named = 1;
break;
case OPT_LIST_CURVES:
list_curves = 1;
break;
case OPT_NO_SEED:
no_seed = 1;
break;
case OPT_NOOUT:
noout = 1;
break;
case OPT_NAME:
curve_name = opt_arg();
break;
case OPT_CONV_FORM:
if (!opt_pair(opt_arg(), forms, &new_form))
goto opthelp;
form = new_form;
new_form = 1;
break;
case OPT_PARAM_ENC:
if (!opt_pair(opt_arg(), encodings, &asn1_flag))
goto opthelp;
new_asn1_flag = 1;
break;
case OPT_GENKEY:
genkey = 1;
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_ENGINE:
e = setup_engine(opt_arg(), 0);
break;
}
}
/* No extra args. */
argc = opt_num_rest();
if (argc != 0)
goto opthelp;
private = genkey ? 1 : 0;
in = bio_open_default(infile, 'r', informat);
if (in == NULL)
goto end;
out = bio_open_owner(outfile, outformat, private);
if (out == NULL)
goto end;
if (list_curves) {
EC_builtin_curve *curves = NULL;
size_t crv_len = EC_get_builtin_curves(NULL, 0);
size_t n;
curves = app_malloc((int)sizeof(*curves) * crv_len, "list curves");
if (!EC_get_builtin_curves(curves, crv_len)) {
OPENSSL_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);
}
OPENSSL_free(curves);
ret = 0;
goto end;
}
if (curve_name != NULL) {
int nid;
/*
* workaround for the SECG curve names secp192r1 and secp256r1 (which
* are the same as the curves prime192v1 and prime256v1 defined in
* X9.62)
*/
if (strcmp(curve_name, "secp192r1") == 0) {
BIO_printf(bio_err, "using curve name prime192v1 "
"instead of secp192r1\n");
nid = NID_X9_62_prime192v1;
} else if (strcmp(curve_name, "secp256r1") == 0) {
BIO_printf(bio_err, "using curve name prime256v1 "
"instead of secp256r1\n");
nid = NID_X9_62_prime256v1;
} else {
nid = OBJ_sn2nid(curve_name);
}
if (nid == 0)
nid = EC_curve_nist2nid(curve_name);
if (nid == 0) {
BIO_printf(bio_err, "unknown curve name (%s)\n", 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", curve_name);
goto end;
}
EC_GROUP_set_asn1_flag(group, asn1_flag);
EC_GROUP_set_point_conversion_form(group, form);
} else if (informat == FORMAT_ASN1) {
group = d2i_ECPKParameters_bio(in, NULL);
} else {
group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);
}
if (group == NULL) {
BIO_printf(bio_err, "unable to load elliptic curve parameters\n");
ERR_print_errors(bio_err);
goto end;
}
if (new_form)
EC_GROUP_set_point_conversion_form(group, form);
if (new_asn1_flag)
EC_GROUP_set_asn1_flag(group, asn1_flag);
if (no_seed) {
EC_GROUP_set_seed(group, NULL, 0);
}
if (text) {
if (!ECPKParameters_print(out, group, 0))
goto end;
}
if (check_named) {
BIO_printf(bio_err, "validating named elliptic curve parameters: ");
if (EC_GROUP_check_named_curve(group, 0, NULL) <= 0) {
BIO_printf(bio_err, "failed\n");
ERR_print_errors(bio_err);
goto end;
}
BIO_printf(bio_err, "ok\n");
}
if (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);
goto end;
}
BIO_printf(bio_err, "ok\n");
}
if (outformat == FORMAT_ASN1 && genkey)
noout = 1;
if (!noout) {
if (outformat == FORMAT_ASN1)
i = i2d_ECPKParameters_bio(out, group);
else
i = PEM_write_bio_ECPKParameters(out, group);
if (!i) {
BIO_printf(bio_err, "unable to write elliptic "
"curve parameters\n");
ERR_print_errors(bio_err);
goto end;
}
}
if (genkey) {
EC_KEY *eckey = EC_KEY_new();
if (eckey == NULL)
goto end;
if (EC_KEY_set_group(eckey, group) == 0) {
BIO_printf(bio_err, "unable to set group when generating key\n");
EC_KEY_free(eckey);
ERR_print_errors(bio_err);
goto end;
}
if (new_form)
EC_KEY_set_conv_form(eckey, form);
if (!EC_KEY_generate_key(eckey)) {
BIO_printf(bio_err, "unable to generate key\n");
EC_KEY_free(eckey);
ERR_print_errors(bio_err);
goto end;
}
assert(private);
if (outformat == FORMAT_ASN1)
i = i2d_ECPrivateKey_bio(out, eckey);
else
i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
NULL, 0, NULL, NULL);
EC_KEY_free(eckey);
}
ret = 0;
end:
BN_free(ec_p);
BN_free(ec_a);
BN_free(ec_b);
BN_free(ec_gen);
BN_free(ec_order);
BN_free(ec_cofactor);
OPENSSL_free(buffer);
EC_GROUP_free(group);
release_engine(e);
BIO_free(in);
BIO_free_all(out);
return ret;
}
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