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

/*
 * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (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_5,
    OPT_R_ENUM
} OPTION_CHOICE;

const OPTIONS dhparam_options[] = {
    {OPT_HELP_STR, 1, '-', "Usage: %s [flags] [numbits]\n"},
    {OPT_HELP_STR, 1, '-', "Valid options are:\n"},
    {"help", OPT_HELP, '-', "Display this summary"},
    {"in", OPT_IN, '<', "Input file"},
    {"inform", OPT_INFORM, 'F', "Input format, DER or PEM"},
    {"outform", OPT_OUTFORM, 'F', "Output format, DER or PEM"},
    {"out", OPT_OUT, '>', "Output file"},
    {"check", OPT_CHECK, '-', "Check the DH parameters"},
    {"text", OPT_TEXT, '-', "Print a text form of the DH parameters"},
    {"noout", OPT_NOOUT, '-', "Don't output any DH parameters"},
    OPT_R_OPTIONS,
    {"C", OPT_C, '-', "Print C code"},
    {"2", OPT_2, '-', "Generate parameters using 2 as the generator value"},
    {"5", OPT_5, '-', "Generate parameters using 5 as the generator value"},
# 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
    {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_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
    /* 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 */
    }

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

    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, "#ifndef HEADER_DH_H\n"
                        "# include <openssl/dh.h>\n"
                        "#endif\n"
                        "\n");
        BIO_printf(out, "DH *get_dh%d()\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 *dhp_bn, *dhg_bn;\n"
                        "\n"
                        "    if (dh == NULL)\n"
                        "        return NULL;\n");
        BIO_printf(out, "    dhp_bn = BN_bin2bn(dhp_%d, sizeof(dhp_%d), NULL);\n",
                   bits, bits);
        BIO_printf(out, "    dhg_bn = BN_bin2bn(dhg_%d, sizeof(dhg_%d), NULL);\n",
                   bits, bits);
        BIO_printf(out, "    if (dhp_bn == NULL || dhg_bn == NULL\n"
                        "            || !DH_set0_pqg(dh, dhp_bn, NULL, dhg_bn)) {\n"
                        "        DH_free(dh);\n"
                        "        BN_free(dhp_bn);\n"
                        "        BN_free(dhg_bn);\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"
                        "    }\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)
{
    char c = '*';

    if (p == 0)
        c = '.';
    if (p == 1)
        c = '+';
    if (p == 2)
        c = '*';
    if (p == 3)
        c = '\n';
    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	/*
2234212c	2	* Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
41918458	3	*
846e33c7 RS	4	* Licensed under the OpenSSL license (the "License"). You may not use
	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,
3ee1eac2 RS	40	OPT_DSAPARAM, OPT_C, OPT_2, OPT_5,
3ee1eac2 RS	41	OPT_R_ENUM
7e1b7485 RS	42	} OPTION_CHOICE;
7e1b7485 RS	43
44c83ebd	44	const OPTIONS dhparam_options[] = {
7e1b7485 RS	45	{OPT_HELP_STR, 1, '-', "Usage: %s [flags] [numbits]\n"},
	46	{OPT_HELP_STR, 1, '-', "Valid options are:\n"},
	47	{"help", OPT_HELP, '-', "Display this summary"},
	48	{"in", OPT_IN, '<', "Input file"},
	49	{"inform", OPT_INFORM, 'F', "Input format, DER or PEM"},
	50	{"outform", OPT_OUTFORM, 'F', "Output format, DER or PEM"},
	51	{"out", OPT_OUT, '>', "Output file"},
	52	{"check", OPT_CHECK, '-', "Check the DH parameters"},
	53	{"text", OPT_TEXT, '-', "Print a text form of the DH parameters"},
16e1b281	54	{"noout", OPT_NOOUT, '-', "Don't output any DH parameters"},
3ee1eac2	55	OPT_R_OPTIONS,
7e1b7485 RS	56	{"C", OPT_C, '-', "Print C code"},
	57	{"2", OPT_2, '-', "Generate parameters using 2 as the generator value"},
	58	{"5", OPT_5, '-', "Generate parameters using 5 as the generator value"},
7e1b7485 RS	59	# ifndef OPENSSL_NO_DSA
	60	{"dsaparam", OPT_DSAPARAM, '-',
	61	"Read or generate DSA parameters, convert to DH"},
9c3bcfa0 RS	62	# endif
	63	# ifndef OPENSSL_NO_ENGINE
	64	{"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
0f113f3e	65	# endif
7e1b7485 RS	66	{NULL}
	67	};
	68
	69	int dhparam_main(int argc, char **argv)
	70	{
	71	BIO in = NULL, out = NULL;
	72	DH *dh = NULL;
3ee1eac2	73	char infile = NULL, outfile = NULL, *prog;
dd1abd44	74	ENGINE *e = NULL;
83ae8124 MC	75	#ifndef OPENSSL_NO_DSA
	76	int dsaparam = 0;
	77	#endif
	78	int i, text = 0, C = 0, ret = 1, num = 0, g = 0;
7e1b7485 RS	79	int informat = FORMAT_PEM, outformat = FORMAT_PEM, check = 0, noout = 0;
	80	OPTION_CHOICE o;
	81
	82	prog = opt_init(argc, argv, dhparam_options);
	83	while ((o = opt_next()) != OPT_EOF) {
	84	switch (o) {
	85	case OPT_EOF:
	86	case OPT_ERR:
	87	opthelp:
	88	BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
	89	goto end;
	90	case OPT_HELP:
	91	opt_help(dhparam_options);
	92	ret = 0;
	93	goto end;
	94	case OPT_INFORM:
	95	if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
	96	goto opthelp;
	97	break;
	98	case OPT_OUTFORM:
	99	if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
	100	goto opthelp;
	101	break;
	102	case OPT_IN:
	103	infile = opt_arg();
	104	break;
	105	case OPT_OUT:
	106	outfile = opt_arg();
	107	break;
	108	case OPT_ENGINE:
dd1abd44	109	e = setup_engine(opt_arg(), 0);
7e1b7485 RS	110	break;
7e1b7485 RS	111	case OPT_CHECK:
0f113f3e	112	check = 1;
7e1b7485 RS	113	break;
7e1b7485 RS	114	case OPT_TEXT:
0f113f3e	115	text = 1;
7e1b7485 RS	116	break;
7e1b7485 RS	117	case OPT_DSAPARAM:
83ae8124	118	#ifndef OPENSSL_NO_DSA
0f113f3e	119	dsaparam = 1;
83ae8124	120	#endif
7e1b7485 RS	121	break;
7e1b7485 RS	122	case OPT_C:
0f113f3e	123	C = 1;
7e1b7485 RS	124	break;
7e1b7485 RS	125	case OPT_2:
0f113f3e	126	g = 2;
7e1b7485 RS	127	break;
7e1b7485 RS	128	case OPT_5:
0f113f3e	129	g = 5;
7e1b7485 RS	130	break;
	131	case OPT_NOOUT:
	132	noout = 1;
	133	break;
3ee1eac2 RS	134	case OPT_R_CASES:
	135	if (!opt_rand(o))
	136	goto end;
7e1b7485 RS	137	break;
7e1b7485 RS	138	}
0f113f3e	139	}
7e1b7485 RS	140	argc = opt_num_rest();
7e1b7485 RS	141	argv = opt_rest();
0f113f3e	142
2234212c	143	if (argv[0] != NULL && (!opt_int(argv[0], &num) \|\| num <= 0))
0f113f3e	144	goto end;
0f113f3e	145
0f113f3e MC	146	if (g && !num)
	147	num = DEFBITS;
	148
	149	# ifndef OPENSSL_NO_DSA
7e1b7485 RS	150	if (dsaparam && g) {
	151	BIO_printf(bio_err,
	152	"generator may not be chosen for DSA parameters\n");
	153	goto end;
0f113f3e	154	}
7e1b7485 RS	155	# endif
	156	/* DH parameters */
	157	if (num && !g)
	158	g = 2;
0f113f3e MC	159
	160	if (num) {
	161
	162	BN_GENCB *cb;
	163	cb = BN_GENCB_new();
96487cdd	164	if (cb == NULL) {
0f113f3e MC	165	ERR_print_errors(bio_err);
	166	goto end;
	167	}
	168
	169	BN_GENCB_set(cb, dh_cb, bio_err);
0f113f3e MC	170
	171	# ifndef OPENSSL_NO_DSA
	172	if (dsaparam) {
	173	DSA *dsa = DSA_new();
	174
	175	BIO_printf(bio_err,
	176	"Generating DSA parameters, %d bit long prime\n", num);
96487cdd	177	if (dsa == NULL
0f113f3e MC	178	\|\| !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL,
0f113f3e MC	179	cb)) {
d6407083	180	DSA_free(dsa);
0f113f3e MC	181	BN_GENCB_free(cb);
	182	ERR_print_errors(bio_err);
	183	goto end;
	184	}
	185
	186	dh = DSA_dup_DH(dsa);
	187	DSA_free(dsa);
	188	if (dh == NULL) {
	189	BN_GENCB_free(cb);
	190	ERR_print_errors(bio_err);
	191	goto end;
	192	}
	193	} else
	194	# endif
	195	{
	196	dh = DH_new();
	197	BIO_printf(bio_err,
	198	"Generating DH parameters, %d bit long safe prime, generator %d\n",
	199	num, g);
	200	BIO_printf(bio_err, "This is going to take a long time\n");
96487cdd	201	if (dh == NULL \|\| !DH_generate_parameters_ex(dh, num, g, cb)) {
0f113f3e MC	202	BN_GENCB_free(cb);
	203	ERR_print_errors(bio_err);
	204	goto end;
	205	}
	206	}
	207
	208	BN_GENCB_free(cb);
0f113f3e MC	209	} else {
0f113f3e MC	210
bdd58d98	211	in = bio_open_default(infile, 'r', informat);
7e1b7485	212	if (in == NULL)
0f113f3e	213	goto end;
0f113f3e	214
0f113f3e MC	215	# ifndef OPENSSL_NO_DSA
	216	if (dsaparam) {
	217	DSA *dsa;
	218
	219	if (informat == FORMAT_ASN1)
	220	dsa = d2i_DSAparams_bio(in, NULL);
	221	else /* informat == FORMAT_PEM */
	222	dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
	223
	224	if (dsa == NULL) {
	225	BIO_printf(bio_err, "unable to load DSA parameters\n");
	226	ERR_print_errors(bio_err);
	227	goto end;
	228	}
	229
	230	dh = DSA_dup_DH(dsa);
	231	DSA_free(dsa);
	232	if (dh == NULL) {
	233	ERR_print_errors(bio_err);
	234	goto end;
	235	}
	236	} else
	237	# endif
	238	{
18d20b5e MC	239	if (informat == FORMAT_ASN1) {
	240	/*
	241	* We have no PEM header to determine what type of DH params it
	242	* is. We'll just try both.
	243	*/
0f113f3e	244	dh = d2i_DHparams_bio(in, NULL);
18d20b5e MC	245	/* BIO_reset() returns 0 for success for file BIOs only!!! */
	246	if (dh == NULL && BIO_reset(in) == 0)
	247	dh = d2i_DHxparams_bio(in, NULL);
	248	} else {
	249	/* informat == FORMAT_PEM */
0f113f3e	250	dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
18d20b5e	251	}
0f113f3e MC	252
	253	if (dh == NULL) {
	254	BIO_printf(bio_err, "unable to load DH parameters\n");
	255	ERR_print_errors(bio_err);
	256	goto end;
	257	}
	258	}
	259
	260	/* dh != NULL */
	261	}
	262
bdd58d98	263	out = bio_open_default(outfile, 'w', outformat);
7e1b7485	264	if (out == NULL)
0f113f3e	265	goto end;
0f113f3e MC	266
	267	if (text) {
	268	DHparams_print(out, dh);
	269	}
	270
	271	if (check) {
	272	if (!DH_check(dh, &i)) {
	273	ERR_print_errors(bio_err);
	274	goto end;
	275	}
	276	if (i & DH_CHECK_P_NOT_PRIME)
eeb21772	277	BIO_printf(bio_err, "WARNING: p value is not prime\n");
0f113f3e	278	if (i & DH_CHECK_P_NOT_SAFE_PRIME)
eeb21772 MC	279	BIO_printf(bio_err, "WARNING: p value is not a safe prime\n");
	280	if (i & DH_CHECK_Q_NOT_PRIME)
	281	BIO_printf(bio_err, "WARNING: q value is not a prime\n");
	282	if (i & DH_CHECK_INVALID_Q_VALUE)
	283	BIO_printf(bio_err, "WARNING: q value is invalid\n");
	284	if (i & DH_CHECK_INVALID_J_VALUE)
	285	BIO_printf(bio_err, "WARNING: j value is invalid\n");
0f113f3e	286	if (i & DH_UNABLE_TO_CHECK_GENERATOR)
eeb21772 MC	287	BIO_printf(bio_err,
eeb21772 MC	288	"WARNING: unable to check the generator value\n");
0f113f3e	289	if (i & DH_NOT_SUITABLE_GENERATOR)
eeb21772	290	BIO_printf(bio_err, "WARNING: the g value is not a generator\n");
0f113f3e	291	if (i == 0)
eeb21772 MC	292	BIO_printf(bio_err, "DH parameters appear to be ok.\n");
	293	if (num != 0 && i != 0) {
	294	/*
	295	* We have generated parameters but DH_check() indicates they are
	296	* invalid! This should never happen!
	297	*/
	298	BIO_printf(bio_err, "ERROR: Invalid parameters generated\n");
	299	goto end;
	300	}
0f113f3e MC	301	}
	302	if (C) {
	303	unsigned char *data;
7e1b7485	304	int len, bits;
2ac6115d	305	const BIGNUM pbn, gbn;
0f113f3e	306
0aeddcfa MC	307	len = DH_size(dh);
	308	bits = DH_bits(dh);
	309	DH_get0_pqg(dh, &pbn, NULL, &gbn);
68dc6824	310	data = app_malloc(len, "print a BN");
7e1b7485 RS	311	BIO_printf(out, "#ifndef HEADER_DH_H\n"
	312	"# include <openssl/dh.h>\n"
	313	"#endif\n"
	314	"\n");
	315	BIO_printf(out, "DH *get_dh%d()\n{\n", bits);
0aeddcfa MC	316	print_bignum_var(out, pbn, "dhp", bits, data);
	317	print_bignum_var(out, gbn, "dhg", bits, data);
	318	BIO_printf(out, " DH *dh = DH_new();\n"
	319	" BIGNUM dhp_bn, dhg_bn;\n"
7e1b7485 RS	320	"\n"
	321	" if (dh == NULL)\n"
	322	" return NULL;\n");
cbe29648	323	BIO_printf(out, " dhp_bn = BN_bin2bn(dhp_%d, sizeof(dhp_%d), NULL);\n",
0aeddcfa	324	bits, bits);
cbe29648	325	BIO_printf(out, " dhg_bn = BN_bin2bn(dhg_%d, sizeof(dhg_%d), NULL);\n",
0aeddcfa MC	326	bits, bits);
	327	BIO_printf(out, " if (dhp_bn == NULL \|\| dhg_bn == NULL\n"
	328	" \|\| !DH_set0_pqg(dh, dhp_bn, NULL, dhg_bn)) {\n"
7e1b7485	329	" DH_free(dh);\n"
0aeddcfa MC	330	" BN_free(dhp_bn);\n"
0aeddcfa MC	331	" BN_free(dhg_bn);\n"
7e1b7485 RS	332	" return NULL;\n"
7e1b7485 RS	333	" }\n");
0aeddcfa	334	if (DH_get_length(dh) > 0)
7e1b7485	335	BIO_printf(out,
0aeddcfa MC	336	" if (!DH_set_length(dh, %ld)) {\n"
	337	" DH_free(dh);\n"
	338	" }\n", DH_get_length(dh));
7e1b7485	339	BIO_printf(out, " return dh;\n}\n");
0f113f3e MC	340	OPENSSL_free(data);
	341	}
	342
	343	if (!noout) {
2ac6115d	344	const BIGNUM *q;
0aeddcfa	345	DH_get0_pqg(dh, NULL, &q, NULL);
18d20b5e MC	346	if (outformat == FORMAT_ASN1) {
	347	if (q != NULL)
	348	i = i2d_DHxparams_bio(out, dh);
	349	else
	350	i = i2d_DHparams_bio(out, dh);
2234212c	351	} else if (q != NULL) {
7e1b7485	352	i = PEM_write_bio_DHxparams(out, dh);
2234212c	353	} else {
7e1b7485	354	i = PEM_write_bio_DHparams(out, dh);
2234212c	355	}
0f113f3e MC	356	if (!i) {
	357	BIO_printf(bio_err, "unable to write DH parameters\n");
	358	ERR_print_errors(bio_err);
	359	goto end;
	360	}
	361	}
	362	ret = 0;
	363	end:
ca3a82c3 RS	364	BIO_free(in);
ca3a82c3 RS	365	BIO_free_all(out);
d6407083	366	DH_free(dh);
dd1abd44	367	release_engine(e);
26a7d938	368	return ret;
0f113f3e	369	}
09483c58	370
6d23cf97	371	static int dh_cb(int p, int n, BN_GENCB *cb)
0f113f3e MC	372	{
	373	char c = '*';
	374
	375	if (p == 0)
	376	c = '.';
	377	if (p == 1)
	378	c = '+';
	379	if (p == 2)
	380	c = '*';
	381	if (p == 3)
	382	c = '\n';
	383	BIO_write(BN_GENCB_get_arg(cb), &c, 1);
	384	(void)BIO_flush(BN_GENCB_get_arg(cb));
	385	return 1;
	386	}
09483c58	387	#endif