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

/*
 * Copyright 1995-2018 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 <openssl/opensslconf.h>
#ifdef OPENSSL_NO_DH
NON_EMPTY_TRANSLATION_UNIT
#else

# 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>

# ifndef OPENSSL_NO_DSA
#  include <openssl/dsa.h>
# endif

# define DEFBITS 2048

static int dh_cb(int p, int n, BN_GENCB *cb);

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_C, OPT_2, OPT_3, OPT_5,
    OPT_R_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"},
    {"C", OPT_C, '-', "Print C code"},
    {"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_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;
    char *infile = NULL, *outfile = NULL, *prog;
    ENGINE *e = NULL;
#ifndef OPENSSL_NO_DSA
    int dsaparam = 0;
#endif
    int i, text = 0, C = 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
            dsaparam = 1;
#endif
            break;
        case OPT_C:
            C = 1;
            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;
        }
    }
    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;

# ifndef OPENSSL_NO_DSA
    if (dsaparam && g) {
        BIO_printf(bio_err,
                   "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) {

        BN_GENCB *cb;
        cb = BN_GENCB_new();
        if (cb == NULL) {
            ERR_print_errors(bio_err);
            goto end;
        }

        BN_GENCB_set(cb, dh_cb, bio_err);

# ifndef OPENSSL_NO_DSA
        if (dsaparam) {
            DSA *dsa = DSA_new();

            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);
                ERR_print_errors(bio_err);
                goto end;
            }

            dh = DSA_dup_DH(dsa);
            DSA_free(dsa);
            if (dh == NULL) {
                BN_GENCB_free(cb);
                ERR_print_errors(bio_err);
                goto end;
            }
        } else
# endif
        {
            dh = DH_new();
            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 (dh == NULL || !DH_generate_parameters_ex(dh, num, g, cb)) {
                BN_GENCB_free(cb);
                ERR_print_errors(bio_err);
                goto end;
            }
        }

        BN_GENCB_free(cb);
    } else {

        in = bio_open_default(infile, 'r', informat);
        if (in == NULL)
            goto end;

# ifndef OPENSSL_NO_DSA
        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, "unable to load DSA parameters\n");
                ERR_print_errors(bio_err);
                goto end;
            }

            dh = DSA_dup_DH(dsa);
            DSA_free(dsa);
            if (dh == NULL) {
                ERR_print_errors(bio_err);
                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 = d2i_DHparams_bio(in, NULL);
                /* BIO_reset() returns 0 for success for file BIOs only!!! */
                if (dh == NULL && BIO_reset(in) == 0)
                    dh = d2i_DHxparams_bio(in, NULL);
            } else {
                /* informat == FORMAT_PEM */
                dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
            }

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

        /* dh != NULL */
    }

    if (text) {
        DHparams_print(out, dh);
    }

    if (check) {
        if (!DH_check(dh, &i)) {
            ERR_print_errors(bio_err);
            goto end;
        }
        if (i & DH_CHECK_P_NOT_PRIME)
            BIO_printf(bio_err, "WARNING: p value is not prime\n");
        if (i & DH_CHECK_P_NOT_SAFE_PRIME)
            BIO_printf(bio_err, "WARNING: p value is not a safe prime\n");
        if (i & DH_CHECK_Q_NOT_PRIME)
            BIO_printf(bio_err, "WARNING: q value is not a prime\n");
        if (i & DH_CHECK_INVALID_Q_VALUE)
            BIO_printf(bio_err, "WARNING: q value is invalid\n");
        if (i & DH_CHECK_INVALID_J_VALUE)
            BIO_printf(bio_err, "WARNING: j value is invalid\n");
        if (i & DH_UNABLE_TO_CHECK_GENERATOR)
            BIO_printf(bio_err,
                       "WARNING: unable to check the generator value\n");
        if (i & DH_NOT_SUITABLE_GENERATOR)
            BIO_printf(bio_err, "WARNING: the g value is not a generator\n");
        if (i == 0)
            BIO_printf(bio_err, "DH parameters appear to be ok.\n");
        if (num != 0 && i != 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 (C) {
        unsigned char *data;
        int len, bits;
        const BIGNUM *pbn, *gbn;

        len = DH_size(dh);
        bits = DH_bits(dh);
        DH_get0_pqg(dh, &pbn, NULL, &gbn);
        data = app_malloc(len, "print a BN");

        BIO_printf(out, "static DH *get_dh%d(void)\n{\n", bits);
        print_bignum_var(out, pbn, "dhp", bits, data);
        print_bignum_var(out, gbn, "dhg", bits, data);
        BIO_printf(out, "    DH *dh = DH_new();\n"
                        "    BIGNUM *p, *g;\n"
                        "\n"
                        "    if (dh == NULL)\n"
                        "        return NULL;\n");
        BIO_printf(out, "    p = BN_bin2bn(dhp_%d, sizeof(dhp_%d), NULL);\n",
                   bits, bits);
        BIO_printf(out, "    g = BN_bin2bn(dhg_%d, sizeof(dhg_%d), NULL);\n",
                   bits, bits);
        BIO_printf(out, "    if (p == NULL || g == NULL\n"
                        "            || !DH_set0_pqg(dh, p, NULL, g)) {\n"
                        "        DH_free(dh);\n"
                        "        BN_free(p);\n"
                        "        BN_free(g);\n"
                        "        return NULL;\n"
                        "    }\n");
        if (DH_get_length(dh) > 0)
            BIO_printf(out,
                        "    if (!DH_set_length(dh, %ld)) {\n"
                        "        DH_free(dh);\n"
                        "        return NULL;\n"
                        "    }\n", DH_get_length(dh));
        BIO_printf(out, "    return dh;\n}\n");
        OPENSSL_free(data);
    }

    if (!noout) {
        const BIGNUM *q;
        DH_get0_pqg(dh, NULL, &q, NULL);
        if (outformat == FORMAT_ASN1) {
            if (q != NULL)
                i = i2d_DHxparams_bio(out, dh);
            else
                i = i2d_DHparams_bio(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, "unable to write DH parameters\n");
            ERR_print_errors(bio_err);
            goto end;
        }
    }
    ret = 0;
 end:
    BIO_free(in);
    BIO_free_all(out);
    DH_free(dh);
    release_engine(e);
    return ret;
}

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

    BIO_write(BN_GENCB_get_arg(cb), &c, 1);
    (void)BIO_flush(BN_GENCB_get_arg(cb));
    return 1;
}
#endif
Commit	Line	Data
846e33c7	1	/*
6738bf14	2	* Copyright 1995-2018 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
effaf4de RS	10	#include <openssl/opensslconf.h>
	11	#ifdef OPENSSL_NO_DH
	12	NON_EMPTY_TRANSLATION_UNIT
	13	#else
	14
0f113f3e MC	15	# include <stdio.h>
	16	# include <stdlib.h>
	17	# include <time.h>
	18	# include <string.h>
	19	# include "apps.h"
dab2cd68	20	# include "progs.h"
0f113f3e MC	21	# include <openssl/bio.h>
	22	# include <openssl/err.h>
	23	# include <openssl/bn.h>
	24	# include <openssl/dh.h>
	25	# include <openssl/x509.h>
	26	# include <openssl/pem.h>
	27
	28	# ifndef OPENSSL_NO_DSA
	29	# include <openssl/dsa.h>
	30	# endif
41918458	31
0f113f3e	32	# define DEFBITS 2048
09483c58	33
6d23cf97	34	static int dh_cb(int p, int n, BN_GENCB *cb);
09483c58	35
7e1b7485 RS	36	typedef enum OPTION_choice {
	37	OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
	38	OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT,
	39	OPT_ENGINE, OPT_CHECK, OPT_TEXT, OPT_NOOUT,
a38c878c	40	OPT_DSAPARAM, OPT_C, OPT_2, OPT_3, OPT_5,
3ee1eac2	41	OPT_R_ENUM
7e1b7485 RS	42	} OPTION_CHOICE;
7e1b7485 RS	43
44c83ebd	44	const OPTIONS dhparam_options[] = {
92de469f	45	{OPT_HELP_STR, 1, '-', "Usage: %s [options] [numbits]\n"},
5388f986 RS	46
5388f986 RS	47	OPT_SECTION("General"),
7e1b7485	48	{"help", OPT_HELP, '-', "Display this summary"},
5388f986 RS	49	{"check", OPT_CHECK, '-', "Check the DH parameters"},
	50	# ifndef OPENSSL_NO_DSA
	51	{"dsaparam", OPT_DSAPARAM, '-',
	52	"Read or generate DSA parameters, convert to DH"},
	53	# endif
	54	# ifndef OPENSSL_NO_ENGINE
	55	{"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
	56	# endif
	57
	58	OPT_SECTION("Input"),
7e1b7485 RS	59	{"in", OPT_IN, '<', "Input file"},
7e1b7485 RS	60	{"inform", OPT_INFORM, 'F', "Input format, DER or PEM"},
5388f986 RS	61
5388f986 RS	62	OPT_SECTION("Output"),
7e1b7485	63	{"out", OPT_OUT, '>', "Output file"},
5388f986	64	{"outform", OPT_OUTFORM, 'F', "Output format, DER or PEM"},
7e1b7485	65	{"text", OPT_TEXT, '-', "Print a text form of the DH parameters"},
16e1b281	66	{"noout", OPT_NOOUT, '-', "Don't output any DH parameters"},
7e1b7485 RS	67	{"C", OPT_C, '-', "Print C code"},
7e1b7485 RS	68	{"2", OPT_2, '-', "Generate parameters using 2 as the generator value"},
a38c878c	69	{"3", OPT_3, '-', "Generate parameters using 3 as the generator value"},
7e1b7485	70	{"5", OPT_5, '-', "Generate parameters using 5 as the generator value"},
5388f986 RS	71
5388f986 RS	72	OPT_R_OPTIONS,
92de469f RS	73
	74	OPT_PARAMETERS(),
	75	{"numbits", 0, 0, "Number of bits if generating parameters (optional)"},
7e1b7485 RS	76	{NULL}
	77	};
	78
	79	int dhparam_main(int argc, char **argv)
	80	{
	81	BIO in = NULL, out = NULL;
	82	DH *dh = NULL;
3ee1eac2	83	char infile = NULL, outfile = NULL, *prog;
dd1abd44	84	ENGINE *e = NULL;
83ae8124 MC	85	#ifndef OPENSSL_NO_DSA
	86	int dsaparam = 0;
	87	#endif
	88	int i, text = 0, C = 0, ret = 1, num = 0, g = 0;
7e1b7485 RS	89	int informat = FORMAT_PEM, outformat = FORMAT_PEM, check = 0, noout = 0;
	90	OPTION_CHOICE o;
	91
	92	prog = opt_init(argc, argv, dhparam_options);
	93	while ((o = opt_next()) != OPT_EOF) {
	94	switch (o) {
	95	case OPT_EOF:
	96	case OPT_ERR:
	97	opthelp:
	98	BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
	99	goto end;
	100	case OPT_HELP:
	101	opt_help(dhparam_options);
	102	ret = 0;
	103	goto end;
	104	case OPT_INFORM:
	105	if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
	106	goto opthelp;
	107	break;
	108	case OPT_OUTFORM:
	109	if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
	110	goto opthelp;
	111	break;
	112	case OPT_IN:
	113	infile = opt_arg();
	114	break;
	115	case OPT_OUT:
	116	outfile = opt_arg();
	117	break;
	118	case OPT_ENGINE:
dd1abd44	119	e = setup_engine(opt_arg(), 0);
7e1b7485 RS	120	break;
7e1b7485 RS	121	case OPT_CHECK:
0f113f3e	122	check = 1;
7e1b7485 RS	123	break;
7e1b7485 RS	124	case OPT_TEXT:
0f113f3e	125	text = 1;
7e1b7485 RS	126	break;
7e1b7485 RS	127	case OPT_DSAPARAM:
83ae8124	128	#ifndef OPENSSL_NO_DSA
0f113f3e	129	dsaparam = 1;
83ae8124	130	#endif
7e1b7485 RS	131	break;
7e1b7485 RS	132	case OPT_C:
0f113f3e	133	C = 1;
7e1b7485 RS	134	break;
7e1b7485 RS	135	case OPT_2:
0f113f3e	136	g = 2;
7e1b7485	137	break;
a38c878c BE	138	case OPT_3:
	139	g = 3;
	140	break;
7e1b7485	141	case OPT_5:
0f113f3e	142	g = 5;
7e1b7485 RS	143	break;
	144	case OPT_NOOUT:
	145	noout = 1;
	146	break;
3ee1eac2 RS	147	case OPT_R_CASES:
	148	if (!opt_rand(o))
	149	goto end;
7e1b7485 RS	150	break;
7e1b7485 RS	151	}
0f113f3e	152	}
7e1b7485 RS	153	argc = opt_num_rest();
7e1b7485 RS	154	argv = opt_rest();
0f113f3e	155
2234212c	156	if (argv[0] != NULL && (!opt_int(argv[0], &num) \|\| num <= 0))
0f113f3e	157	goto end;
0f113f3e	158
0f113f3e MC	159	if (g && !num)
	160	num = DEFBITS;
	161
	162	# ifndef OPENSSL_NO_DSA
7e1b7485 RS	163	if (dsaparam && g) {
	164	BIO_printf(bio_err,
	165	"generator may not be chosen for DSA parameters\n");
	166	goto end;
0f113f3e	167	}
7e1b7485	168	# endif
10b37541 RL	169
	170	out = bio_open_default(outfile, 'w', outformat);
	171	if (out == NULL)
	172	goto end;
	173
7e1b7485 RS	174	/* DH parameters */
	175	if (num && !g)
	176	g = 2;
0f113f3e MC	177
	178	if (num) {
	179
	180	BN_GENCB *cb;
	181	cb = BN_GENCB_new();
96487cdd	182	if (cb == NULL) {
0f113f3e MC	183	ERR_print_errors(bio_err);
	184	goto end;
	185	}
	186
	187	BN_GENCB_set(cb, dh_cb, bio_err);
0f113f3e MC	188
	189	# ifndef OPENSSL_NO_DSA
	190	if (dsaparam) {
	191	DSA *dsa = DSA_new();
	192
	193	BIO_printf(bio_err,
	194	"Generating DSA parameters, %d bit long prime\n", num);
96487cdd	195	if (dsa == NULL
0f113f3e MC	196	\|\| !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL,
0f113f3e MC	197	cb)) {
d6407083	198	DSA_free(dsa);
0f113f3e MC	199	BN_GENCB_free(cb);
	200	ERR_print_errors(bio_err);
	201	goto end;
	202	}
	203
	204	dh = DSA_dup_DH(dsa);
	205	DSA_free(dsa);
	206	if (dh == NULL) {
	207	BN_GENCB_free(cb);
	208	ERR_print_errors(bio_err);
	209	goto end;
	210	}
	211	} else
	212	# endif
	213	{
	214	dh = DH_new();
	215	BIO_printf(bio_err,
	216	"Generating DH parameters, %d bit long safe prime, generator %d\n",
	217	num, g);
	218	BIO_printf(bio_err, "This is going to take a long time\n");
96487cdd	219	if (dh == NULL \|\| !DH_generate_parameters_ex(dh, num, g, cb)) {
0f113f3e MC	220	BN_GENCB_free(cb);
	221	ERR_print_errors(bio_err);
	222	goto end;
	223	}
	224	}
	225
	226	BN_GENCB_free(cb);
0f113f3e MC	227	} else {
0f113f3e MC	228
bdd58d98	229	in = bio_open_default(infile, 'r', informat);
7e1b7485	230	if (in == NULL)
0f113f3e	231	goto end;
0f113f3e	232
0f113f3e MC	233	# ifndef OPENSSL_NO_DSA
	234	if (dsaparam) {
	235	DSA *dsa;
	236
	237	if (informat == FORMAT_ASN1)
	238	dsa = d2i_DSAparams_bio(in, NULL);
	239	else /* informat == FORMAT_PEM */
	240	dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
	241
	242	if (dsa == NULL) {
	243	BIO_printf(bio_err, "unable to load DSA parameters\n");
	244	ERR_print_errors(bio_err);
	245	goto end;
	246	}
	247
	248	dh = DSA_dup_DH(dsa);
	249	DSA_free(dsa);
	250	if (dh == NULL) {
	251	ERR_print_errors(bio_err);
	252	goto end;
	253	}
	254	} else
	255	# endif
	256	{
18d20b5e MC	257	if (informat == FORMAT_ASN1) {
	258	/*
	259	* We have no PEM header to determine what type of DH params it
	260	* is. We'll just try both.
	261	*/
0f113f3e	262	dh = d2i_DHparams_bio(in, NULL);
18d20b5e MC	263	/* BIO_reset() returns 0 for success for file BIOs only!!! */
	264	if (dh == NULL && BIO_reset(in) == 0)
	265	dh = d2i_DHxparams_bio(in, NULL);
	266	} else {
	267	/* informat == FORMAT_PEM */
0f113f3e	268	dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
18d20b5e	269	}
0f113f3e MC	270
	271	if (dh == NULL) {
	272	BIO_printf(bio_err, "unable to load DH parameters\n");
	273	ERR_print_errors(bio_err);
	274	goto end;
	275	}
	276	}
	277
	278	/* dh != NULL */
	279	}
	280
0f113f3e MC	281	if (text) {
	282	DHparams_print(out, dh);
	283	}
	284
	285	if (check) {
	286	if (!DH_check(dh, &i)) {
	287	ERR_print_errors(bio_err);
	288	goto end;
	289	}
	290	if (i & DH_CHECK_P_NOT_PRIME)
eeb21772	291	BIO_printf(bio_err, "WARNING: p value is not prime\n");
0f113f3e	292	if (i & DH_CHECK_P_NOT_SAFE_PRIME)
eeb21772 MC	293	BIO_printf(bio_err, "WARNING: p value is not a safe prime\n");
	294	if (i & DH_CHECK_Q_NOT_PRIME)
	295	BIO_printf(bio_err, "WARNING: q value is not a prime\n");
	296	if (i & DH_CHECK_INVALID_Q_VALUE)
	297	BIO_printf(bio_err, "WARNING: q value is invalid\n");
	298	if (i & DH_CHECK_INVALID_J_VALUE)
	299	BIO_printf(bio_err, "WARNING: j value is invalid\n");
0f113f3e	300	if (i & DH_UNABLE_TO_CHECK_GENERATOR)
eeb21772 MC	301	BIO_printf(bio_err,
eeb21772 MC	302	"WARNING: unable to check the generator value\n");
0f113f3e	303	if (i & DH_NOT_SUITABLE_GENERATOR)
eeb21772	304	BIO_printf(bio_err, "WARNING: the g value is not a generator\n");
0f113f3e	305	if (i == 0)
eeb21772 MC	306	BIO_printf(bio_err, "DH parameters appear to be ok.\n");
	307	if (num != 0 && i != 0) {
	308	/*
	309	* We have generated parameters but DH_check() indicates they are
	310	* invalid! This should never happen!
	311	*/
	312	BIO_printf(bio_err, "ERROR: Invalid parameters generated\n");
	313	goto end;
	314	}
0f113f3e MC	315	}
	316	if (C) {
	317	unsigned char *data;
7e1b7485	318	int len, bits;
2ac6115d	319	const BIGNUM pbn, gbn;
0f113f3e	320
0aeddcfa MC	321	len = DH_size(dh);
	322	bits = DH_bits(dh);
	323	DH_get0_pqg(dh, &pbn, NULL, &gbn);
68dc6824	324	data = app_malloc(len, "print a BN");
201b305a BB	325
201b305a BB	326	BIO_printf(out, "static DH *get_dh%d(void)\n{\n", bits);
0aeddcfa MC	327	print_bignum_var(out, pbn, "dhp", bits, data);
	328	print_bignum_var(out, gbn, "dhg", bits, data);
	329	BIO_printf(out, " DH *dh = DH_new();\n"
201b305a	330	" BIGNUM p, g;\n"
7e1b7485 RS	331	"\n"
	332	" if (dh == NULL)\n"
	333	" return NULL;\n");
201b305a	334	BIO_printf(out, " p = BN_bin2bn(dhp_%d, sizeof(dhp_%d), NULL);\n",
0aeddcfa	335	bits, bits);
201b305a	336	BIO_printf(out, " g = BN_bin2bn(dhg_%d, sizeof(dhg_%d), NULL);\n",
0aeddcfa	337	bits, bits);
201b305a BB	338	BIO_printf(out, " if (p == NULL \|\| g == NULL\n"
201b305a BB	339	" \|\| !DH_set0_pqg(dh, p, NULL, g)) {\n"
7e1b7485	340	" DH_free(dh);\n"
201b305a BB	341	" BN_free(p);\n"
201b305a BB	342	" BN_free(g);\n"
7e1b7485 RS	343	" return NULL;\n"
7e1b7485 RS	344	" }\n");
0aeddcfa	345	if (DH_get_length(dh) > 0)
7e1b7485	346	BIO_printf(out,
0aeddcfa MC	347	" if (!DH_set_length(dh, %ld)) {\n"
0aeddcfa MC	348	" DH_free(dh);\n"
201b305a	349	" return NULL;\n"
0aeddcfa	350	" }\n", DH_get_length(dh));
7e1b7485	351	BIO_printf(out, " return dh;\n}\n");
0f113f3e MC	352	OPENSSL_free(data);
	353	}
	354
	355	if (!noout) {
2ac6115d	356	const BIGNUM *q;
0aeddcfa	357	DH_get0_pqg(dh, NULL, &q, NULL);
18d20b5e MC	358	if (outformat == FORMAT_ASN1) {
	359	if (q != NULL)
	360	i = i2d_DHxparams_bio(out, dh);
	361	else
	362	i = i2d_DHparams_bio(out, dh);
2234212c	363	} else if (q != NULL) {
7e1b7485	364	i = PEM_write_bio_DHxparams(out, dh);
2234212c	365	} else {
7e1b7485	366	i = PEM_write_bio_DHparams(out, dh);
2234212c	367	}
0f113f3e MC	368	if (!i) {
	369	BIO_printf(bio_err, "unable to write DH parameters\n");
	370	ERR_print_errors(bio_err);
	371	goto end;
	372	}
	373	}
	374	ret = 0;
	375	end:
ca3a82c3 RS	376	BIO_free(in);
ca3a82c3 RS	377	BIO_free_all(out);
d6407083	378	DH_free(dh);
dd1abd44	379	release_engine(e);
26a7d938	380	return ret;
0f113f3e	381	}
09483c58	382
6d23cf97	383	static int dh_cb(int p, int n, BN_GENCB *cb)
0f113f3e	384	{
201b305a BB	385	static const char symbols[] = ".+*\n";
	386	char c = (p >= 0 && (size_t)p < sizeof(symbols) - 1) ? symbols[p] : '?';
	387
0f113f3e MC	388	BIO_write(BN_GENCB_get_arg(cb), &c, 1);
	389	(void)BIO_flush(BN_GENCB_get_arg(cb));
	390	return 1;
	391	}
09483c58	392	#endif