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

/*
 * Copyright 1995-2020 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
 */

#ifndef OPENSSL_NO_DEPRECATED_3_0
/* We need to use some deprecated APIs */
# define OPENSSL_SUPPRESS_DEPRECATED
#endif
#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/dh.h>
#include <openssl/x509.h>
#include <openssl/pem.h>

#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
# include <openssl/dsa.h>
#endif

#define DEFBITS 2048

#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
static int dh_cb(int p, int n, BN_GENCB *cb);
#endif
static int gendh_cb(EVP_PKEY_CTX *ctx);

typedef enum OPTION_choice {
    OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
    OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT,
    OPT_ENGINE, OPT_CHECK, OPT_TEXT, OPT_NOOUT,
    OPT_DSAPARAM, OPT_2, OPT_3, OPT_5,
    OPT_R_ENUM, OPT_PROV_ENUM
} OPTION_CHOICE;

const OPTIONS dhparam_options[] = {
    {OPT_HELP_STR, 1, '-', "Usage: %s [options] [numbits]\n"},

    OPT_SECTION("General"),
    {"help", OPT_HELP, '-', "Display this summary"},
    {"check", OPT_CHECK, '-', "Check the DH parameters"},
#ifndef OPENSSL_NO_DSA
    {"dsaparam", OPT_DSAPARAM, '-',
     "Read or generate DSA parameters, convert to DH"},
#endif
#ifndef OPENSSL_NO_ENGINE
    {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
#endif

    OPT_SECTION("Input"),
    {"in", OPT_IN, '<', "Input file"},
    {"inform", OPT_INFORM, 'F', "Input format, DER or PEM"},

    OPT_SECTION("Output"),
    {"out", OPT_OUT, '>', "Output file"},
    {"outform", OPT_OUTFORM, 'F', "Output format, DER or PEM"},
    {"text", OPT_TEXT, '-', "Print a text form of the DH parameters"},
    {"noout", OPT_NOOUT, '-', "Don't output any DH parameters"},
    {"2", OPT_2, '-', "Generate parameters using 2 as the generator value"},
    {"3", OPT_3, '-', "Generate parameters using 3 as the generator value"},
    {"5", OPT_5, '-', "Generate parameters using 5 as the generator value"},

    OPT_R_OPTIONS,
    OPT_PROV_OPTIONS,

    OPT_PARAMETERS(),
    {"numbits", 0, 0, "Number of bits if generating parameters (optional)"},
    {NULL}
};

int dhparam_main(int argc, char **argv)
{
    BIO *in = NULL, *out = NULL;
    DH *dh = NULL, *alloc_dh = NULL;
    EVP_PKEY *pkey = NULL;
    EVP_PKEY_CTX *ctx = NULL;
    char *infile = NULL, *outfile = NULL, *prog;
    ENGINE *e = NULL;
#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
    int dsaparam = 0;
#endif
    int i, text = 0, ret = 1, num = 0, g = 0;
    int informat = FORMAT_PEM, outformat = FORMAT_PEM, check = 0, noout = 0;
    OPTION_CHOICE o;

    prog = opt_init(argc, argv, dhparam_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(dhparam_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_IN:
            infile = opt_arg();
            break;
        case OPT_OUT:
            outfile = opt_arg();
            break;
        case OPT_ENGINE:
            e = setup_engine(opt_arg(), 0);
            break;
        case OPT_CHECK:
            check = 1;
            break;
        case OPT_TEXT:
            text = 1;
            break;
        case OPT_DSAPARAM:
#ifndef OPENSSL_NO_DSA
# ifdef OPENSSL_NO_DEPRECATED_3_0
            BIO_printf(bio_err, "The dsaparam option is deprecated.\n");
# else
            dsaparam = 1;
# endif
#endif
            break;
        case OPT_2:
            g = 2;
            break;
        case OPT_3:
            g = 3;
            break;
        case OPT_5:
            g = 5;
            break;
        case OPT_NOOUT:
            noout = 1;
            break;
        case OPT_R_CASES:
            if (!opt_rand(o))
                goto end;
            break;
        case OPT_PROV_CASES:
            if (!opt_provider(o))
                goto end;
            break;
        }
    }
    argc = opt_num_rest();
    argv = opt_rest();

    if (argv[0] != NULL && (!opt_int(argv[0], &num) || num <= 0))
        goto end;

    if (g && !num)
        num = DEFBITS;

#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
    if (dsaparam && g) {
        BIO_printf(bio_err,
                   "Error, generator may not be chosen for DSA parameters\n");
        goto end;
    }
#endif

    out = bio_open_default(outfile, 'w', outformat);
    if (out == NULL)
        goto end;

    /* DH parameters */
    if (num && !g)
        g = 2;

    if (num) {


#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
        if (dsaparam) {
            DSA *dsa = DSA_new();
            BN_GENCB *cb  = BN_GENCB_new();

            if (cb == NULL)
                goto end;

            BN_GENCB_set(cb, dh_cb, bio_err);

            BIO_printf(bio_err,
                       "Generating DSA parameters, %d bit long prime\n", num);
            if (dsa == NULL
                || !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL,
                                               cb)) {
                DSA_free(dsa);
                BN_GENCB_free(cb);
                BIO_printf(bio_err, "Error, unable to generate DSA parameters\n");
                goto end;
            }

            dh = alloc_dh = DSA_dup_DH(dsa);
            DSA_free(dsa);
            BN_GENCB_free(cb);
            if (dh == NULL)
                goto end;
        } else
#endif
        {
            ctx = EVP_PKEY_CTX_new_from_name(NULL, "DH", NULL);
            if (ctx == NULL) {
                BIO_printf(bio_err,
                           "Error, DH key generation context allocation failed\n");
                goto end;
            }
            EVP_PKEY_CTX_set_cb(ctx, gendh_cb);
            EVP_PKEY_CTX_set_app_data(ctx, bio_err);
            BIO_printf(bio_err,
                       "Generating DH parameters, %d bit long safe prime, generator %d\n",
                       num, g);
            BIO_printf(bio_err, "This is going to take a long time\n");
            if (!EVP_PKEY_paramgen_init(ctx)) {
                BIO_printf(bio_err,
                           "Error, unable to initialise DH param generation\n");
                goto end;
            }

            if (!EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, num)) {
                BIO_printf(bio_err, "Error, unable to set DH prime length\n");
                goto end;
            }
            if (!EVP_PKEY_paramgen(ctx, &pkey)) {
                BIO_printf(bio_err, "Error, DH generation failed\n");
                goto end;
            }
            dh = EVP_PKEY_get0_DH(pkey);
        }
    } else {
        in = bio_open_default(infile, 'r', informat);
        if (in == NULL)
            goto end;

#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
        if (dsaparam) {
            DSA *dsa;

            if (informat == FORMAT_ASN1)
                dsa = d2i_DSAparams_bio(in, NULL);
            else                /* informat == FORMAT_PEM */
                dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);

            if (dsa == NULL) {
                BIO_printf(bio_err, "Error, unable to load DSA parameters\n");
                goto end;
            }

            dh = alloc_dh = DSA_dup_DH(dsa);
            DSA_free(dsa);
            if (dh == NULL)
                goto end;
        } else
#endif
        {
            if (informat == FORMAT_ASN1) {
                /*
                 * We have no PEM header to determine what type of DH params it
                 * is. We'll just try both.
                 */
                dh = alloc_dh = ASN1_d2i_bio_of(DH, DH_new, d2i_DHparams, in, NULL);
                /* BIO_reset() returns 0 for success for file BIOs only!!! */
                if (dh == NULL && BIO_reset(in) == 0)
                    dh = alloc_dh = ASN1_d2i_bio_of(DH, DH_new, d2i_DHxparams, in, NULL);
            } else {
                /* informat == FORMAT_PEM */
                dh = alloc_dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
            }

            if (dh == NULL) {
                BIO_printf(bio_err, "Error, unable to load DH parameters\n");
                goto end;
            }
        }
        /* dh != NULL */
    }

    if (text)
        EVP_PKEY_print_params(out, pkey, 4, NULL);

    if (check) {
        if (!EVP_PKEY_param_check(ctx) /* DH_check(dh, &i) */) {
            BIO_printf(bio_err, "Error, invalid parameters generated\n");
            goto end;
        }
        BIO_printf(bio_err, "DH parameters appear to be ok.\n");
        if (num != 0) {
            /*
             * We have generated parameters but DH_check() indicates they are
             * invalid! This should never happen!
             */
            BIO_printf(bio_err, "Error, invalid parameters generated\n");
            goto end;
        }
    }

    if (!noout) {
        const BIGNUM *q;
        DH_get0_pqg(dh, NULL, &q, NULL);
        if (outformat == FORMAT_ASN1) {
            if (q != NULL)
                i = ASN1_i2d_bio_of(DH, i2d_DHxparams, out, dh);
            else
                i = ASN1_i2d_bio_of(DH, i2d_DHparams, out, dh);
        } else if (q != NULL) {
            i = PEM_write_bio_DHxparams(out, dh);
        } else {
            i = PEM_write_bio_DHparams(out, dh);
        }
        if (!i) {
            BIO_printf(bio_err, "Error, unable to write DH parameters\n");
            goto end;
        }
    }
    ret = 0;
 end:
    if (ret != 0)
        ERR_print_errors(bio_err);
    DH_free(alloc_dh);
    BIO_free(in);
    BIO_free_all(out);
    EVP_PKEY_free(pkey);
    EVP_PKEY_CTX_free(ctx);
    release_engine(e);
    return ret;
}

static int common_dh_cb(int p, BIO *b)
{
    static const char symbols[] = ".+*\n";
    char c = (p >= 0 && (size_t)p < sizeof(symbols) - 1) ? symbols[p] : '?';

    BIO_write(b, &c, 1);
    (void)BIO_flush(b);
    return 1;
}

#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
static int dh_cb(int p, int n, BN_GENCB *cb)
{
    return common_dh_cb(p, BN_GENCB_get_arg(cb));
}
#endif

static int gendh_cb(EVP_PKEY_CTX *ctx)
{
    return common_dh_cb(EVP_PKEY_CTX_get_keygen_info(ctx, 0),
                        EVP_PKEY_CTX_get_app_data(ctx));
}
Commit	Line	Data
846e33c7	1	/*
33388b44	2	* Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
41918458	3	*
dffa7520	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
846e33c7 RS	5	* this file except in compliance with the License. You can obtain a copy
	6	* in the file LICENSE in the source distribution or at
	7	* https://www.openssl.org/source/license.html
41918458	8	*/
09483c58	9
ccefc341	10	#ifndef OPENSSL_NO_DEPRECATED_3_0
1ddf2594	11	/* We need to use some deprecated APIs */
ccefc341 P	12	# define OPENSSL_SUPPRESS_DEPRECATED
ccefc341 P	13	#endif
effaf4de	14	#include <openssl/opensslconf.h>
1ae56f2f RS	15
	16	#include <stdio.h>
	17	#include <stdlib.h>
	18	#include <time.h>
	19	#include <string.h>
	20	#include "apps.h"
	21	#include "progs.h"
	22	#include <openssl/bio.h>
	23	#include <openssl/err.h>
	24	#include <openssl/bn.h>
	25	#include <openssl/dh.h>
	26	#include <openssl/x509.h>
	27	#include <openssl/pem.h>
	28
ccefc341	29	#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
1ae56f2f RS	30	# include <openssl/dsa.h>
	31	#endif
	32
	33	#define DEFBITS 2048
09483c58	34
ccefc341	35	#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
6d23cf97	36	static int dh_cb(int p, int n, BN_GENCB *cb);
ccefc341 P	37	#endif
ccefc341 P	38	static int gendh_cb(EVP_PKEY_CTX *ctx);
09483c58	39
7e1b7485 RS	40	typedef enum OPTION_choice {
	41	OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
	42	OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT,
	43	OPT_ENGINE, OPT_CHECK, OPT_TEXT, OPT_NOOUT,
1696b890	44	OPT_DSAPARAM, OPT_2, OPT_3, OPT_5,
6bd4e3f2	45	OPT_R_ENUM, OPT_PROV_ENUM
7e1b7485 RS	46	} OPTION_CHOICE;
7e1b7485 RS	47
44c83ebd	48	const OPTIONS dhparam_options[] = {
92de469f	49	{OPT_HELP_STR, 1, '-', "Usage: %s [options] [numbits]\n"},
5388f986 RS	50
5388f986 RS	51	OPT_SECTION("General"),
7e1b7485	52	{"help", OPT_HELP, '-', "Display this summary"},
5388f986	53	{"check", OPT_CHECK, '-', "Check the DH parameters"},
1ae56f2f	54	#ifndef OPENSSL_NO_DSA
5388f986 RS	55	{"dsaparam", OPT_DSAPARAM, '-',
5388f986 RS	56	"Read or generate DSA parameters, convert to DH"},
1ae56f2f RS	57	#endif
1ae56f2f RS	58	#ifndef OPENSSL_NO_ENGINE
5388f986	59	{"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
1ae56f2f	60	#endif
5388f986 RS	61
5388f986 RS	62	OPT_SECTION("Input"),
7e1b7485 RS	63	{"in", OPT_IN, '<', "Input file"},
7e1b7485 RS	64	{"inform", OPT_INFORM, 'F', "Input format, DER or PEM"},
5388f986 RS	65
5388f986 RS	66	OPT_SECTION("Output"),
7e1b7485	67	{"out", OPT_OUT, '>', "Output file"},
5388f986	68	{"outform", OPT_OUTFORM, 'F', "Output format, DER or PEM"},
7e1b7485	69	{"text", OPT_TEXT, '-', "Print a text form of the DH parameters"},
16e1b281	70	{"noout", OPT_NOOUT, '-', "Don't output any DH parameters"},
7e1b7485	71	{"2", OPT_2, '-', "Generate parameters using 2 as the generator value"},
a38c878c	72	{"3", OPT_3, '-', "Generate parameters using 3 as the generator value"},
7e1b7485	73	{"5", OPT_5, '-', "Generate parameters using 5 as the generator value"},
5388f986 RS	74
5388f986 RS	75	OPT_R_OPTIONS,
6bd4e3f2	76	OPT_PROV_OPTIONS,
92de469f RS	77
	78	OPT_PARAMETERS(),
	79	{"numbits", 0, 0, "Number of bits if generating parameters (optional)"},
7e1b7485 RS	80	{NULL}
	81	};
	82
	83	int dhparam_main(int argc, char **argv)
	84	{
	85	BIO in = NULL, out = NULL;
78215852	86	DH dh = NULL, alloc_dh = NULL;
ccefc341 P	87	EVP_PKEY *pkey = NULL;
ccefc341 P	88	EVP_PKEY_CTX *ctx = NULL;
3ee1eac2	89	char infile = NULL, outfile = NULL, *prog;
dd1abd44	90	ENGINE *e = NULL;
ccefc341	91	#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
83ae8124 MC	92	int dsaparam = 0;
83ae8124 MC	93	#endif
1696b890	94	int i, text = 0, ret = 1, num = 0, g = 0;
7e1b7485 RS	95	int informat = FORMAT_PEM, outformat = FORMAT_PEM, check = 0, noout = 0;
	96	OPTION_CHOICE o;
	97
	98	prog = opt_init(argc, argv, dhparam_options);
	99	while ((o = opt_next()) != OPT_EOF) {
	100	switch (o) {
	101	case OPT_EOF:
	102	case OPT_ERR:
	103	opthelp:
	104	BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
	105	goto end;
	106	case OPT_HELP:
	107	opt_help(dhparam_options);
	108	ret = 0;
	109	goto end;
	110	case OPT_INFORM:
	111	if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
	112	goto opthelp;
	113	break;
	114	case OPT_OUTFORM:
	115	if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
	116	goto opthelp;
	117	break;
	118	case OPT_IN:
	119	infile = opt_arg();
	120	break;
	121	case OPT_OUT:
	122	outfile = opt_arg();
	123	break;
	124	case OPT_ENGINE:
dd1abd44	125	e = setup_engine(opt_arg(), 0);
7e1b7485 RS	126	break;
7e1b7485 RS	127	case OPT_CHECK:
0f113f3e	128	check = 1;
7e1b7485 RS	129	break;
7e1b7485 RS	130	case OPT_TEXT:
0f113f3e	131	text = 1;
7e1b7485 RS	132	break;
7e1b7485 RS	133	case OPT_DSAPARAM:
83ae8124	134	#ifndef OPENSSL_NO_DSA
ccefc341 P	135	# ifdef OPENSSL_NO_DEPRECATED_3_0
	136	BIO_printf(bio_err, "The dsaparam option is deprecated.\n");
	137	# else
0f113f3e	138	dsaparam = 1;
ccefc341	139	# endif
83ae8124	140	#endif
7e1b7485	141	break;
7e1b7485	142	case OPT_2:
0f113f3e	143	g = 2;
7e1b7485	144	break;
a38c878c BE	145	case OPT_3:
	146	g = 3;
	147	break;
7e1b7485	148	case OPT_5:
0f113f3e	149	g = 5;
7e1b7485 RS	150	break;
	151	case OPT_NOOUT:
	152	noout = 1;
	153	break;
3ee1eac2 RS	154	case OPT_R_CASES:
	155	if (!opt_rand(o))
	156	goto end;
7e1b7485	157	break;
6bd4e3f2 P	158	case OPT_PROV_CASES:
	159	if (!opt_provider(o))
	160	goto end;
	161	break;
7e1b7485	162	}
0f113f3e	163	}
7e1b7485 RS	164	argc = opt_num_rest();
7e1b7485 RS	165	argv = opt_rest();
0f113f3e	166
2234212c	167	if (argv[0] != NULL && (!opt_int(argv[0], &num) \|\| num <= 0))
0f113f3e	168	goto end;
0f113f3e	169
0f113f3e MC	170	if (g && !num)
	171	num = DEFBITS;
	172
ccefc341	173	#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
7e1b7485 RS	174	if (dsaparam && g) {
7e1b7485 RS	175	BIO_printf(bio_err,
2a3158ac	176	"Error, generator may not be chosen for DSA parameters\n");
7e1b7485	177	goto end;
0f113f3e	178	}
1ae56f2f	179	#endif
10b37541 RL	180
	181	out = bio_open_default(outfile, 'w', outformat);
	182	if (out == NULL)
	183	goto end;
	184
7e1b7485 RS	185	/* DH parameters */
	186	if (num && !g)
	187	g = 2;
0f113f3e MC	188
	189	if (num) {
	190
0f113f3e	191
ccefc341	192	#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
0f113f3e MC	193	if (dsaparam) {
0f113f3e MC	194	DSA *dsa = DSA_new();
ccefc341 P	195	BN_GENCB *cb = BN_GENCB_new();
ccefc341 P	196
2a3158ac	197	if (cb == NULL)
ccefc341	198	goto end;
ccefc341 P	199
ccefc341 P	200	BN_GENCB_set(cb, dh_cb, bio_err);
0f113f3e MC	201
	202	BIO_printf(bio_err,
	203	"Generating DSA parameters, %d bit long prime\n", num);
96487cdd	204	if (dsa == NULL
0f113f3e MC	205	\|\| !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL,
0f113f3e MC	206	cb)) {
d6407083	207	DSA_free(dsa);
0f113f3e	208	BN_GENCB_free(cb);
2a3158ac	209	BIO_printf(bio_err, "Error, unable to generate DSA parameters\n");
0f113f3e MC	210	goto end;
	211	}
	212
78215852	213	dh = alloc_dh = DSA_dup_DH(dsa);
0f113f3e	214	DSA_free(dsa);
ccefc341	215	BN_GENCB_free(cb);
2a3158ac	216	if (dh == NULL)
0f113f3e	217	goto end;
0f113f3e	218	} else
1ae56f2f	219	#endif
0f113f3e	220	{
ccefc341 P	221	ctx = EVP_PKEY_CTX_new_from_name(NULL, "DH", NULL);
ccefc341 P	222	if (ctx == NULL) {
ccefc341 P	223	BIO_printf(bio_err,
	224	"Error, DH key generation context allocation failed\n");
	225	goto end;
	226	}
	227	EVP_PKEY_CTX_set_cb(ctx, gendh_cb);
	228	EVP_PKEY_CTX_set_app_data(ctx, bio_err);
0f113f3e MC	229	BIO_printf(bio_err,
	230	"Generating DH parameters, %d bit long safe prime, generator %d\n",
	231	num, g);
	232	BIO_printf(bio_err, "This is going to take a long time\n");
ccefc341 P	233	if (!EVP_PKEY_paramgen_init(ctx)) {
	234	BIO_printf(bio_err,
	235	"Error, unable to initialise DH param generation\n");
ccefc341 P	236	goto end;
ccefc341 P	237	}
09ec5e6f	238
ccefc341 P	239	if (!EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, num)) {
ccefc341 P	240	BIO_printf(bio_err, "Error, unable to set DH prime length\n");
ccefc341 P	241	goto end;
	242	}
	243	if (!EVP_PKEY_paramgen(ctx, &pkey)) {
	244	BIO_printf(bio_err, "Error, DH generation failed\n");
0f113f3e MC	245	goto end;
0f113f3e MC	246	}
78215852	247	dh = EVP_PKEY_get0_DH(pkey);
0f113f3e	248	}
0f113f3e	249	} else {
bdd58d98	250	in = bio_open_default(infile, 'r', informat);
7e1b7485	251	if (in == NULL)
0f113f3e	252	goto end;
0f113f3e	253
ccefc341	254	#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
0f113f3e MC	255	if (dsaparam) {
	256	DSA *dsa;
	257
	258	if (informat == FORMAT_ASN1)
	259	dsa = d2i_DSAparams_bio(in, NULL);
	260	else /* informat == FORMAT_PEM */
	261	dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
	262
	263	if (dsa == NULL) {
2a3158ac	264	BIO_printf(bio_err, "Error, unable to load DSA parameters\n");
0f113f3e MC	265	goto end;
	266	}
	267
78215852	268	dh = alloc_dh = DSA_dup_DH(dsa);
0f113f3e	269	DSA_free(dsa);
2a3158ac	270	if (dh == NULL)
0f113f3e	271	goto end;
0f113f3e	272	} else
1ae56f2f	273	#endif
0f113f3e	274	{
18d20b5e MC	275	if (informat == FORMAT_ASN1) {
	276	/*
	277	* We have no PEM header to determine what type of DH params it
	278	* is. We'll just try both.
	279	*/
78215852	280	dh = alloc_dh = ASN1_d2i_bio_of(DH, DH_new, d2i_DHparams, in, NULL);
18d20b5e MC	281	/* BIO_reset() returns 0 for success for file BIOs only!!! */
18d20b5e MC	282	if (dh == NULL && BIO_reset(in) == 0)
78215852	283	dh = alloc_dh = ASN1_d2i_bio_of(DH, DH_new, d2i_DHxparams, in, NULL);
18d20b5e MC	284	} else {
18d20b5e MC	285	/* informat == FORMAT_PEM */
78215852	286	dh = alloc_dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
18d20b5e	287	}
0f113f3e MC	288
0f113f3e MC	289	if (dh == NULL) {
2a3158ac	290	BIO_printf(bio_err, "Error, unable to load DH parameters\n");
0f113f3e MC	291	goto end;
	292	}
	293	}
0f113f3e MC	294	/* dh != NULL */
	295	}
	296
ccefc341 P	297	if (text)
ccefc341 P	298	EVP_PKEY_print_params(out, pkey, 4, NULL);
0f113f3e MC	299
0f113f3e MC	300	if (check) {
ccefc341	301	if (!EVP_PKEY_param_check(ctx) /* DH_check(dh, &i) */) {
2a3158ac	302	BIO_printf(bio_err, "Error, invalid parameters generated\n");
0f113f3e MC	303	goto end;
0f113f3e MC	304	}
ccefc341 P	305	BIO_printf(bio_err, "DH parameters appear to be ok.\n");
ccefc341 P	306	if (num != 0) {
eeb21772 MC	307	/*
	308	* We have generated parameters but DH_check() indicates they are
	309	* invalid! This should never happen!
	310	*/
2a3158ac	311	BIO_printf(bio_err, "Error, invalid parameters generated\n");
eeb21772 MC	312	goto end;
eeb21772 MC	313	}
0f113f3e	314	}
0f113f3e MC	315
0f113f3e MC	316	if (!noout) {
2ac6115d	317	const BIGNUM *q;
0aeddcfa	318	DH_get0_pqg(dh, NULL, &q, NULL);
18d20b5e MC	319	if (outformat == FORMAT_ASN1) {
18d20b5e MC	320	if (q != NULL)
ccefc341	321	i = ASN1_i2d_bio_of(DH, i2d_DHxparams, out, dh);
18d20b5e	322	else
ccefc341	323	i = ASN1_i2d_bio_of(DH, i2d_DHparams, out, dh);
2234212c	324	} else if (q != NULL) {
7e1b7485	325	i = PEM_write_bio_DHxparams(out, dh);
2234212c	326	} else {
7e1b7485	327	i = PEM_write_bio_DHparams(out, dh);
2234212c	328	}
0f113f3e	329	if (!i) {
2a3158ac	330	BIO_printf(bio_err, "Error, unable to write DH parameters\n");
0f113f3e MC	331	goto end;
	332	}
	333	}
	334	ret = 0;
	335	end:
2a3158ac DDO	336	if (ret != 0)
2a3158ac DDO	337	ERR_print_errors(bio_err);
78215852	338	DH_free(alloc_dh);
ca3a82c3 RS	339	BIO_free(in);
ca3a82c3 RS	340	BIO_free_all(out);
ccefc341 P	341	EVP_PKEY_free(pkey);
ccefc341 P	342	EVP_PKEY_CTX_free(ctx);
dd1abd44	343	release_engine(e);
26a7d938	344	return ret;
0f113f3e	345	}
09483c58	346
ccefc341	347	static int common_dh_cb(int p, BIO *b)
0f113f3e	348	{
201b305a BB	349	static const char symbols[] = ".+*\n";
	350	char c = (p >= 0 && (size_t)p < sizeof(symbols) - 1) ? symbols[p] : '?';
	351
ccefc341 P	352	BIO_write(b, &c, 1);
ccefc341 P	353	(void)BIO_flush(b);
0f113f3e MC	354	return 1;
0f113f3e MC	355	}
ccefc341 P	356
	357	#if !defined(OPENSSL_NO_DSA) && !defined(OPENSSL_NO_DEPRECATED_3_0)
	358	static int dh_cb(int p, int n, BN_GENCB *cb)
	359	{
	360	return common_dh_cb(p, BN_GENCB_get_arg(cb));
	361	}
	362	#endif
	363
	364	static int gendh_cb(EVP_PKEY_CTX *ctx)
	365	{
	366	return common_dh_cb(EVP_PKEY_CTX_get_keygen_info(ctx, 0),
	367	EVP_PKEY_CTX_get_app_data(ctx));
	368	}