[thirdparty/openssl.git] / apps / ecparam.c

/*
 * Written by Nils Larsch for the OpenSSL project.
 */
/* ====================================================================
 * Copyright (c) 1998-2005 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 *
 * Portions of the attached software ("Contribution") are developed by
 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
 *
 * The Contribution is licensed pursuant to the OpenSSL open source
 * license provided above.
 *
 * The elliptic curve binary polynomial software is originally written by
 * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories.
 *
 */

#include <openssl/opensslconf.h>
#ifndef OPENSSL_NO_EC
# include <stdio.h>
# include <stdlib.h>
# include <time.h>
# include <string.h>
# include "apps.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_C,
    OPT_CHECK, OPT_LIST_CURVES, OPT_NO_SEED, OPT_NOOUT, OPT_NAME,
    OPT_CONV_FORM, OPT_PARAM_ENC, OPT_GENKEY, OPT_RAND, OPT_ENGINE
} OPTION_CHOICE;

OPTIONS ecparam_options[] = {
    {"help", OPT_HELP, '-', "Display this summary"},
    {"inform", OPT_INFORM, 'F', "Input format - default PEM (DER or PEM)"},
    {"outform", OPT_OUTFORM, 'F', "Output format - default PEM"},
    {"in", OPT_IN, '<', "Input file  - default stdin"},
    {"out", OPT_OUT, '>', "Output file - default stdout"},
    {"text", OPT_TEXT, '-', "Print the ec parameters in text form"},
    {"C", OPT_C, '-', "Print a 'C' function creating the parameters"},
    {"check", OPT_CHECK, '-', "Validate the ec parameters"},
    {"list_curves", OPT_LIST_CURVES, '-',
     "Prints a list of all curve 'short names'"},
    {"no_seed", OPT_NO_SEED, '-',
     "If 'explicit' parameters are chosen do not use the seed"},
    {"noout", OPT_NOOUT, '-', "Do not print the ec parameter"},
    {"name", OPT_NAME, 's',
     "Use the ec parameters with specified 'short name'"},
    {"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "},
    {"param_enc", OPT_PARAM_ENC, 's',
     "Specifies the way the ec parameters are encoded"},
    {"genkey", OPT_GENKEY, '-', "Generate ec key"},
    {"rand", OPT_RAND, 's', "Files to use for random number input"},
# ifndef OPENSSL_NO_ENGINE
    {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
# endif
    {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)
{
    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, *inrand = 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, C = 0;
    int ret = 1, private = 0;
    int list_curves = 0, no_seed = 0, check = 0, new_form = 0;
    int text = 0, i, need_rand = 0, genkey = 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_C:
            C = 1;
            break;
        case OPT_CHECK:
            check = 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 = need_rand = 1;
            break;
        case OPT_RAND:
            inrand = opt_arg();
            need_rand = 1;
            break;
        case OPT_ENGINE:
            (void)setup_engine(opt_arg(), 0);
            break;
        }
    }
    argc = opt_num_rest();
    argv = opt_rest();
    private = genkey ? 1 : 0;

    if (!app_load_modules(NULL))
        goto end;

    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) {
        if (group == NULL)
            BIO_printf(bio_err, "no elliptic curve parameters\n");
        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 (C) {
        size_t buf_len = 0, tmp_len = 0;
        const EC_POINT *point;
        int is_prime, len = 0;
        const EC_METHOD *meth = EC_GROUP_method_of(group);

        if ((ec_p = BN_new()) == NULL
                || (ec_a = BN_new()) == NULL
                || (ec_b = BN_new()) == NULL
                || (ec_gen = BN_new()) == NULL
                || (ec_order = BN_new()) == NULL
                || (ec_cofactor = BN_new()) == NULL) {
            perror("Can't allocate BN");
            goto end;
        }

        is_prime = (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field);
        if (!is_prime) {
            BIO_printf(bio_err, "Can only handle X9.62 prime fields\n");
            goto end;
        }

        if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a, ec_b, NULL))
            goto end;

        if ((point = EC_GROUP_get0_generator(group)) == NULL)
            goto end;
        if (!EC_POINT_point2bn(group, point,
                               EC_GROUP_get_point_conversion_form(group),
                               ec_gen, NULL))
            goto end;
        if (!EC_GROUP_get_order(group, ec_order, NULL))
            goto end;
        if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
            goto end;

        if (!ec_p || !ec_a || !ec_b || !ec_gen || !ec_order || !ec_cofactor)
            goto end;

        len = BN_num_bits(ec_order);

        if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len)
            buf_len = tmp_len;
        if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len)
            buf_len = tmp_len;
        if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len)
            buf_len = tmp_len;
        if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len)
            buf_len = tmp_len;
        if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len)
            buf_len = tmp_len;
        if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len)
            buf_len = tmp_len;

        buffer = app_malloc(buf_len, "BN buffer");

        BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n{\n", len);
        print_bignum_var(out, ec_p, "ec_p", len, buffer);
        print_bignum_var(out, ec_a, "ec_a", len, buffer);
        print_bignum_var(out, ec_b, "ec_b", len, buffer);
        print_bignum_var(out, ec_gen, "ec_gen", len, buffer);
        print_bignum_var(out, ec_order, "ec_order", len, buffer);
        print_bignum_var(out, ec_cofactor, "ec_cofactor", len, buffer);
        BIO_printf(out, "    int ok = 0;\n"
                        "    EC_GROUP *group = NULL;\n"
                        "    EC_POINT *point = NULL;\n"
                        "    BIGNUM *tmp_1 = NULL;\n"
                        "    BIGNUM *tmp_2 = NULL;\n"
                        "    BIGNUM *tmp_3 = NULL;\n"
                        "\n");

        BIO_printf(out, "    if ((tmp_1 = BN_bin2bn(ec_p_%d, sizeof (ec_p_%d), NULL)) == NULL)\n"
                        "        goto err;\n", len, len);
        BIO_printf(out, "    if ((tmp_2 = BN_bin2bn(ec_a_%d, sizeof (ec_a_%d), NULL)) == NULL)\n"
                        "        goto err;\n", len, len);
        BIO_printf(out, "    if ((tmp_3 = BN_bin2bn(ec_b_%d, sizeof (ec_b_%d), NULL)) == NULL)\n"
                        "        goto err;\n", len, len);
        BIO_printf(out, "    if ((group = EC_GROUP_new_curve_GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)\n"
                        "        goto err;\n"
                        "\n");
        BIO_printf(out, "    /* build generator */\n");
        BIO_printf(out, "    if ((tmp_1 = BN_bin2bn(ec_gen_%d, sizeof (ec_gen_%d), tmp_1)) == NULL)\n"
                        "        goto err;\n", len, len);
        BIO_printf(out, "    point = EC_POINT_bn2point(group, tmp_1, NULL, NULL);\n");
        BIO_printf(out, "    if (point == NULL)\n"
                        "        goto err;\n");
        BIO_printf(out, "    if ((tmp_2 = BN_bin2bn(ec_order_%d, sizeof (ec_order_%d), tmp_2)) == NULL)\n"
                        "        goto err;\n", len, len);
        BIO_printf(out, "    if ((tmp_3 = BN_bin2bn(ec_cofactor_%d, sizeof (ec_cofactor_%d), tmp_3)) == NULL)\n"
                        "        goto err;\n", len, len);
        BIO_printf(out, "    if (!EC_GROUP_set_generator(group, point, tmp_2, tmp_3))\n"
                        "        goto err;\n"
                        "ok = 1;"
                        "\n");
        BIO_printf(out, "err:\n"
                        "    BN_free(tmp_1);\n"
                        "    BN_free(tmp_2);\n"
                        "    BN_free(tmp_3);\n"
                        "    EC_POINT_free(point);\n"
                        "    if (!ok) {\n"
                        "        EC_GROUP_free(group);\n"
                        "        return NULL;\n"
                        "    }\n"
                        "    return (group);\n"
                        "}\n");
    }

    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 (need_rand) {
        app_RAND_load_file(NULL, (inrand != NULL));
        if (inrand != NULL)
            BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
                       app_RAND_load_files(inrand));
    }

    if (genkey) {
        EC_KEY *eckey = EC_KEY_new();

        if (eckey == NULL)
            goto end;

        assert(need_rand);

        if (EC_KEY_set_group(eckey, group) == 0)
            goto end;

        if (!EC_KEY_generate_key(eckey)) {
            EC_KEY_free(eckey);
            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);
    }

    if (need_rand)
        app_RAND_write_file(NULL);

    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);
    BIO_free(in);
    BIO_free_all(out);
    EC_GROUP_free(group);
    return (ret);
}

#else                           /* !OPENSSL_NO_EC */

# if PEDANTIC
static void *dummy = &dummy;
# endif

#endif
Commit	Line	Data
14a7cfb3	1	/*
7eb18f12	2	* Written by Nils Larsch for the OpenSSL project.
14a7cfb3	3	*/
5dbd3efc	4	/* ====================================================================
9dd84053	5	* Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
5dbd3efc BM	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	*
	11	* 1. Redistributions of source code must retain the above copyright
0f113f3e	12	* notice, this list of conditions and the following disclaimer.
5dbd3efc BM	13	*
	14	* 2. Redistributions in binary form must reproduce the above copyright
	15	* notice, this list of conditions and the following disclaimer in
	16	* the documentation and/or other materials provided with the
	17	* distribution.
	18	*
	19	* 3. All advertising materials mentioning features or use of this
	20	* software must display the following acknowledgment:
	21	* "This product includes software developed by the OpenSSL Project
	22	* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
	23	*
	24	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	25	* endorse or promote products derived from this software without
	26	* prior written permission. For written permission, please contact
	27	* openssl-core@openssl.org.
	28	*
	29	* 5. Products derived from this software may not be called "OpenSSL"
	30	* nor may "OpenSSL" appear in their names without prior written
	31	* permission of the OpenSSL Project.
	32	*
	33	* 6. Redistributions of any form whatsoever must retain the following
	34	* acknowledgment:
	35	* "This product includes software developed by the OpenSSL Project
	36	* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
	37	*
	38	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	39	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	40	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	41	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	42	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	43	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	44	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	45	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	46	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	47	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	48	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	49	* OF THE POSSIBILITY OF SUCH DAMAGE.
	50	* ====================================================================
	51	*
	52	* This product includes cryptographic software written by Eric Young
	53	* (eay@cryptsoft.com). This product includes software written by Tim
	54	* Hudson (tjh@cryptsoft.com).
	55	*
	56	*/
714df32e BM	57	/* ====================================================================
	58	* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
	59	*
0f113f3e	60	* Portions of the attached software ("Contribution") are developed by
714df32e BM	61	* SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
	62	*
	63	* The Contribution is licensed pursuant to the OpenSSL open source
	64	* license provided above.
	65	*
0f113f3e	66	* The elliptic curve binary polynomial software is originally written by
714df32e BM	67	* Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories.
	68	*
	69	*/
6e04afb8 NL	70
6e04afb8 NL	71	#include <openssl/opensslconf.h>
14a7cfb3	72	#ifndef OPENSSL_NO_EC
0f113f3e MC	73	# include <stdio.h>
	74	# include <stdlib.h>
	75	# include <time.h>
	76	# include <string.h>
	77	# include "apps.h"
	78	# include <openssl/bio.h>
	79	# include <openssl/err.h>
	80	# include <openssl/bn.h>
	81	# include <openssl/ec.h>
	82	# include <openssl/x509.h>
	83	# include <openssl/pem.h>
	84
7e1b7485 RS	85	typedef enum OPTION_choice {
	86	OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
	87	OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_TEXT, OPT_C,
	88	OPT_CHECK, OPT_LIST_CURVES, OPT_NO_SEED, OPT_NOOUT, OPT_NAME,
	89	OPT_CONV_FORM, OPT_PARAM_ENC, OPT_GENKEY, OPT_RAND, OPT_ENGINE
	90	} OPTION_CHOICE;
	91
	92	OPTIONS ecparam_options[] = {
	93	{"help", OPT_HELP, '-', "Display this summary"},
	94	{"inform", OPT_INFORM, 'F', "Input format - default PEM (DER or PEM)"},
	95	{"outform", OPT_OUTFORM, 'F', "Output format - default PEM"},
	96	{"in", OPT_IN, '<', "Input file - default stdin"},
	97	{"out", OPT_OUT, '>', "Output file - default stdout"},
	98	{"text", OPT_TEXT, '-', "Print the ec parameters in text form"},
	99	{"C", OPT_C, '-', "Print a 'C' function creating the parameters"},
	100	{"check", OPT_CHECK, '-', "Validate the ec parameters"},
	101	{"list_curves", OPT_LIST_CURVES, '-',
	102	"Prints a list of all curve 'short names'"},
	103	{"no_seed", OPT_NO_SEED, '-',
	104	"If 'explicit' parameters are chosen do not use the seed"},
	105	{"noout", OPT_NOOUT, '-', "Do not print the ec parameter"},
	106	{"name", OPT_NAME, 's',
	107	"Use the ec parameters with specified 'short name'"},
	108	{"conv_form", OPT_CONV_FORM, 's', "Specifies the point conversion form "},
	109	{"param_enc", OPT_PARAM_ENC, 's',
	110	"Specifies the way the ec parameters are encoded"},
	111	{"genkey", OPT_GENKEY, '-', "Generate ec key"},
	112	{"rand", OPT_RAND, 's', "Files to use for random number input"},
	113	# ifndef OPENSSL_NO_ENGINE
	114	{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
	115	# endif
	116	{NULL}
	117	};
	118
df2ee0e2	119	static OPT_PAIR forms[] = {
7e1b7485 RS	120	{"compressed", POINT_CONVERSION_COMPRESSED},
	121	{"uncompressed", POINT_CONVERSION_UNCOMPRESSED},
	122	{"hybrid", POINT_CONVERSION_HYBRID},
	123	{NULL}
	124	};
	125
df2ee0e2	126	static OPT_PAIR encodings[] = {
7e1b7485 RS	127	{"named_curve", OPENSSL_EC_NAMED_CURVE},
	128	{"explicit", 0},
	129	{NULL}
	130	};
	131
	132	int ecparam_main(int argc, char **argv)
0f113f3e	133	{
7e1b7485 RS	134	BIGNUM ec_gen = NULL, ec_order = NULL, *ec_cofactor = NULL;
	135	BIGNUM ec_p = NULL, ec_a = NULL, *ec_b = NULL;
	136	BIO in = NULL, out = NULL;
0f113f3e MC	137	EC_GROUP *group = NULL;
0f113f3e MC	138	point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
0f113f3e	139	char curve_name = NULL, inrand = NULL;
333b070e	140	char infile = NULL, outfile = NULL, *prog;
0f113f3e	141	unsigned char *buffer = NULL;
7e1b7485 RS	142	OPTION_CHOICE o;
7e1b7485 RS	143	int asn1_flag = OPENSSL_EC_NAMED_CURVE, new_asn1_flag = 0;
3b061a00 RS	144	int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0, C = 0;
3b061a00 RS	145	int ret = 1, private = 0;
7e1b7485 RS	146	int list_curves = 0, no_seed = 0, check = 0, new_form = 0;
	147	int text = 0, i, need_rand = 0, genkey = 0;
	148
	149	prog = opt_init(argc, argv, ecparam_options);
	150	while ((o = opt_next()) != OPT_EOF) {
	151	switch (o) {
	152	case OPT_EOF:
	153	case OPT_ERR:
	154	opthelp:
	155	BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
	156	goto end;
	157	case OPT_HELP:
	158	opt_help(ecparam_options);
	159	ret = 0;
	160	goto end;
	161	case OPT_INFORM:
	162	if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
	163	goto opthelp;
	164	break;
	165	case OPT_IN:
	166	infile = opt_arg();
	167	break;
	168	case OPT_OUTFORM:
	169	if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
	170	goto opthelp;
	171	break;
	172	case OPT_OUT:
	173	outfile = opt_arg();
	174	break;
	175	case OPT_TEXT:
0f113f3e	176	text = 1;
7e1b7485 RS	177	break;
7e1b7485 RS	178	case OPT_C:
0f113f3e	179	C = 1;
7e1b7485 RS	180	break;
7e1b7485 RS	181	case OPT_CHECK:
0f113f3e	182	check = 1;
7e1b7485 RS	183	break;
7e1b7485 RS	184	case OPT_LIST_CURVES:
0f113f3e	185	list_curves = 1;
7e1b7485 RS	186	break;
7e1b7485 RS	187	case OPT_NO_SEED:
0f113f3e	188	no_seed = 1;
7e1b7485 RS	189	break;
7e1b7485 RS	190	case OPT_NOOUT:
0f113f3e	191	noout = 1;
7e1b7485 RS	192	break;
	193	case OPT_NAME:
	194	curve_name = opt_arg();
	195	break;
	196	case OPT_CONV_FORM:
	197	if (!opt_pair(opt_arg(), forms, &new_form))
	198	goto opthelp;
	199	form = new_form;
	200	new_form = 1;
	201	break;
	202	case OPT_PARAM_ENC:
	203	if (!opt_pair(opt_arg(), encodings, &asn1_flag))
	204	goto opthelp;
	205	new_asn1_flag = 1;
	206	break;
	207	case OPT_GENKEY:
	208	genkey = need_rand = 1;
	209	break;
	210	case OPT_RAND:
	211	inrand = opt_arg();
0f113f3e	212	need_rand = 1;
7e1b7485 RS	213	break;
7e1b7485 RS	214	case OPT_ENGINE:
333b070e	215	(void)setup_engine(opt_arg(), 0);
0f113f3e MC	216	break;
0f113f3e MC	217	}
0f113f3e	218	}
7e1b7485 RS	219	argc = opt_num_rest();
7e1b7485 RS	220	argv = opt_rest();
3b061a00	221	private = genkey ? 1 : 0;
0f113f3e	222
296f54ee RL	223	if (!app_load_modules(NULL))
	224	goto end;
	225
bdd58d98	226	in = bio_open_default(infile, 'r', informat);
7e1b7485	227	if (in == NULL)
0f113f3e	228	goto end;
bdd58d98	229	out = bio_open_owner(outfile, outformat, private);
7e1b7485	230	if (out == NULL)
0f113f3e	231	goto end;
0f113f3e	232
0f113f3e MC	233	if (list_curves) {
0f113f3e MC	234	EC_builtin_curve *curves = NULL;
68dc6824 RS	235	size_t crv_len = EC_get_builtin_curves(NULL, 0);
68dc6824 RS	236	size_t n;
0f113f3e	237
b4faea50	238	curves = app_malloc((int)sizeof(curves) crv_len, "list curves");
0f113f3e MC	239	if (!EC_get_builtin_curves(curves, crv_len)) {
	240	OPENSSL_free(curves);
	241	goto end;
	242	}
	243
	244	for (n = 0; n < crv_len; n++) {
	245	const char *comment;
	246	const char *sname;
	247	comment = curves[n].comment;
	248	sname = OBJ_nid2sn(curves[n].nid);
	249	if (comment == NULL)
	250	comment = "CURVE DESCRIPTION NOT AVAILABLE";
	251	if (sname == NULL)
	252	sname = "";
	253
	254	BIO_printf(out, " %-10s: ", sname);
	255	BIO_printf(out, "%s\n", comment);
	256	}
	257
	258	OPENSSL_free(curves);
	259	ret = 0;
	260	goto end;
	261	}
	262
	263	if (curve_name != NULL) {
	264	int nid;
	265
	266	/*
	267	* workaround for the SECG curve names secp192r1 and secp256r1 (which
	268	* are the same as the curves prime192v1 and prime256v1 defined in
	269	* X9.62)
	270	*/
86885c28	271	if (strcmp(curve_name, "secp192r1") == 0) {
0f113f3e MC	272	BIO_printf(bio_err, "using curve name prime192v1 "
	273	"instead of secp192r1\n");
	274	nid = NID_X9_62_prime192v1;
86885c28	275	} else if (strcmp(curve_name, "secp256r1") == 0) {
0f113f3e MC	276	BIO_printf(bio_err, "using curve name prime256v1 "
	277	"instead of secp256r1\n");
	278	nid = NID_X9_62_prime256v1;
	279	} else
	280	nid = OBJ_sn2nid(curve_name);
	281
	282	if (nid == 0)
	283	nid = EC_curve_nist2nid(curve_name);
	284
	285	if (nid == 0) {
	286	BIO_printf(bio_err, "unknown curve name (%s)\n", curve_name);
	287	goto end;
	288	}
	289
	290	group = EC_GROUP_new_by_curve_name(nid);
	291	if (group == NULL) {
	292	BIO_printf(bio_err, "unable to create curve (%s)\n", curve_name);
	293	goto end;
	294	}
	295	EC_GROUP_set_asn1_flag(group, asn1_flag);
	296	EC_GROUP_set_point_conversion_form(group, form);
7e1b7485	297	} else if (informat == FORMAT_ASN1)
0f113f3e	298	group = d2i_ECPKParameters_bio(in, NULL);
7e1b7485	299	else
0f113f3e	300	group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);
0f113f3e MC	301	if (group == NULL) {
	302	BIO_printf(bio_err, "unable to load elliptic curve parameters\n");
	303	ERR_print_errors(bio_err);
	304	goto end;
	305	}
	306
	307	if (new_form)
	308	EC_GROUP_set_point_conversion_form(group, form);
	309
	310	if (new_asn1_flag)
	311	EC_GROUP_set_asn1_flag(group, asn1_flag);
	312
	313	if (no_seed) {
	314	EC_GROUP_set_seed(group, NULL, 0);
	315	}
	316
	317	if (text) {
	318	if (!ECPKParameters_print(out, group, 0))
	319	goto end;
	320	}
	321
	322	if (check) {
	323	if (group == NULL)
	324	BIO_printf(bio_err, "no elliptic curve parameters\n");
	325	BIO_printf(bio_err, "checking elliptic curve parameters: ");
	326	if (!EC_GROUP_check(group, NULL)) {
	327	BIO_printf(bio_err, "failed\n");
	328	ERR_print_errors(bio_err);
99dcd880 PW	329	goto end;
	330	}
	331	BIO_printf(bio_err, "ok\n");
0f113f3e MC	332
	333	}
	334
	335	if (C) {
	336	size_t buf_len = 0, tmp_len = 0;
	337	const EC_POINT *point;
	338	int is_prime, len = 0;
	339	const EC_METHOD *meth = EC_GROUP_method_of(group);
	340
7e1b7485 RS	341	if ((ec_p = BN_new()) == NULL
	342	\|\| (ec_a = BN_new()) == NULL
	343	\|\| (ec_b = BN_new()) == NULL
	344	\|\| (ec_gen = BN_new()) == NULL
	345	\|\| (ec_order = BN_new()) == NULL
	346	\|\| (ec_cofactor = BN_new()) == NULL) {
68dc6824	347	perror("Can't allocate BN");
0f113f3e MC	348	goto end;
	349	}
	350
	351	is_prime = (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field);
7e1b7485 RS	352	if (!is_prime) {
7e1b7485 RS	353	BIO_printf(bio_err, "Can only handle X9.62 prime fields\n");
0f113f3e MC	354	goto end;
	355	}
	356
7e1b7485 RS	357	if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a, ec_b, NULL))
	358	goto end;
	359
0f113f3e MC	360	if ((point = EC_GROUP_get0_generator(group)) == NULL)
	361	goto end;
	362	if (!EC_POINT_point2bn(group, point,
	363	EC_GROUP_get_point_conversion_form(group),
	364	ec_gen, NULL))
	365	goto end;
	366	if (!EC_GROUP_get_order(group, ec_order, NULL))
	367	goto end;
	368	if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
	369	goto end;
	370
	371	if (!ec_p \|\| !ec_a \|\| !ec_b \|\| !ec_gen \|\| !ec_order \|\| !ec_cofactor)
	372	goto end;
	373
	374	len = BN_num_bits(ec_order);
	375
	376	if ((tmp_len = (size_t)BN_num_bytes(ec_p)) > buf_len)
	377	buf_len = tmp_len;
	378	if ((tmp_len = (size_t)BN_num_bytes(ec_a)) > buf_len)
	379	buf_len = tmp_len;
	380	if ((tmp_len = (size_t)BN_num_bytes(ec_b)) > buf_len)
	381	buf_len = tmp_len;
	382	if ((tmp_len = (size_t)BN_num_bytes(ec_gen)) > buf_len)
	383	buf_len = tmp_len;
	384	if ((tmp_len = (size_t)BN_num_bytes(ec_order)) > buf_len)
	385	buf_len = tmp_len;
	386	if ((tmp_len = (size_t)BN_num_bytes(ec_cofactor)) > buf_len)
	387	buf_len = tmp_len;
	388
68dc6824	389	buffer = app_malloc(buf_len, "BN buffer");
0f113f3e	390
7e1b7485 RS	391	BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n{\n", len);
	392	print_bignum_var(out, ec_p, "ec_p", len, buffer);
	393	print_bignum_var(out, ec_a, "ec_a", len, buffer);
	394	print_bignum_var(out, ec_b, "ec_b", len, buffer);
	395	print_bignum_var(out, ec_gen, "ec_gen", len, buffer);
	396	print_bignum_var(out, ec_order, "ec_order", len, buffer);
	397	print_bignum_var(out, ec_cofactor, "ec_cofactor", len, buffer);
	398	BIO_printf(out, " int ok = 0;\n"
	399	" EC_GROUP *group = NULL;\n"
	400	" EC_POINT *point = NULL;\n"
	401	" BIGNUM *tmp_1 = NULL;\n"
	402	" BIGNUM *tmp_2 = NULL;\n"
	403	" BIGNUM *tmp_3 = NULL;\n"
	404	"\n");
	405
	406	BIO_printf(out, " if ((tmp_1 = BN_bin2bn(ec_p_%d, sizeof (ec_p_%d), NULL)) == NULL)\n"
	407	" goto err;\n", len, len);
	408	BIO_printf(out, " if ((tmp_2 = BN_bin2bn(ec_a_%d, sizeof (ec_a_%d), NULL)) == NULL)\n"
	409	" goto err;\n", len, len);
	410	BIO_printf(out, " if ((tmp_3 = BN_bin2bn(ec_b_%d, sizeof (ec_b_%d), NULL)) == NULL)\n"
	411	" goto err;\n", len, len);
	412	BIO_printf(out, " if ((group = EC_GROUP_new_curve_GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)\n"
	413	" goto err;\n"
	414	"\n");
	415	BIO_printf(out, " /* build generator */\n");
	416	BIO_printf(out, " if ((tmp_1 = BN_bin2bn(ec_gen_%d, sizeof (ec_gen_%d), tmp_1)) == NULL)\n"
	417	" goto err;\n", len, len);
	418	BIO_printf(out, " point = EC_POINT_bn2point(group, tmp_1, NULL, NULL);\n");
	419	BIO_printf(out, " if (point == NULL)\n"
	420	" goto err;\n");
	421	BIO_printf(out, " if ((tmp_2 = BN_bin2bn(ec_order_%d, sizeof (ec_order_%d), tmp_2)) == NULL)\n"
	422	" goto err;\n", len, len);
	423	BIO_printf(out, " if ((tmp_3 = BN_bin2bn(ec_cofactor_%d, sizeof (ec_cofactor_%d), tmp_3)) == NULL)\n"
	424	" goto err;\n", len, len);
	425	BIO_printf(out, " if (!EC_GROUP_set_generator(group, point, tmp_2, tmp_3))\n"
	426	" goto err;\n"
	427	"ok = 1;"
	428	"\n");
	429	BIO_printf(out, "err:\n"
	430	" BN_free(tmp_1);\n"
	431	" BN_free(tmp_2);\n"
	432	" BN_free(tmp_3);\n"
	433	" EC_POINT_free(point);\n"
	434	" if (!ok) {\n"
	435	" EC_GROUP_free(group);\n"
	436	" return NULL;\n"
	437	" }\n"
	438	" return (group);\n"
	439	"}\n");
0f113f3e MC	440	}
	441
	442	if (!noout) {
	443	if (outformat == FORMAT_ASN1)
	444	i = i2d_ECPKParameters_bio(out, group);
7e1b7485	445	else
0f113f3e	446	i = PEM_write_bio_ECPKParameters(out, group);
0f113f3e MC	447	if (!i) {
	448	BIO_printf(bio_err, "unable to write elliptic "
	449	"curve parameters\n");
	450	ERR_print_errors(bio_err);
	451	goto end;
	452	}
	453	}
	454
	455	if (need_rand) {
7e1b7485	456	app_RAND_load_file(NULL, (inrand != NULL));
0f113f3e MC	457	if (inrand != NULL)
	458	BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
	459	app_RAND_load_files(inrand));
	460	}
	461
	462	if (genkey) {
	463	EC_KEY *eckey = EC_KEY_new();
	464
	465	if (eckey == NULL)
	466	goto end;
	467
	468	assert(need_rand);
	469
	470	if (EC_KEY_set_group(eckey, group) == 0)
	471	goto end;
	472
	473	if (!EC_KEY_generate_key(eckey)) {
	474	EC_KEY_free(eckey);
	475	goto end;
	476	}
3b061a00	477	assert(private);
0f113f3e MC	478	if (outformat == FORMAT_ASN1)
0f113f3e MC	479	i = i2d_ECPrivateKey_bio(out, eckey);
7e1b7485	480	else
0f113f3e MC	481	i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
0f113f3e MC	482	NULL, 0, NULL, NULL);
0f113f3e MC	483	EC_KEY_free(eckey);
	484	}
	485
	486	if (need_rand)
7e1b7485	487	app_RAND_write_file(NULL);
0f113f3e MC	488
	489	ret = 0;
	490	end:
23a1d5e9 RS	491	BN_free(ec_p);
	492	BN_free(ec_a);
	493	BN_free(ec_b);
	494	BN_free(ec_gen);
	495	BN_free(ec_order);
	496	BN_free(ec_cofactor);
b548a1f1	497	OPENSSL_free(buffer);
ca3a82c3 RS	498	BIO_free(in);
ca3a82c3 RS	499	BIO_free_all(out);
8fdc3734	500	EC_GROUP_free(group);
7e1b7485	501	return (ret);
5dbd3efc BM	502	}
5dbd3efc BM	503
0f113f3e	504	#else /* !OPENSSL_NO_EC */
ef236ec3 DSH	505
ef236ec3 DSH	506	# if PEDANTIC
0f113f3e	507	static void *dummy = &dummy;
ef236ec3 DSH	508	# endif
ef236ec3 DSH	509
5dbd3efc	510	#endif