[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 [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"},
    {"3", OPT_3, '-', "Generate parameters using 3 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_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[] = {
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"},
7e1b7485 RS	57	{"2", OPT_2, '-', "Generate parameters using 2 as the generator value"},
a38c878c	58	{"3", OPT_3, '-', "Generate parameters using 3 as the generator value"},
7e1b7485	59	{"5", OPT_5, '-', "Generate parameters using 5 as the generator value"},
7e1b7485 RS	60	# ifndef OPENSSL_NO_DSA
	61	{"dsaparam", OPT_DSAPARAM, '-',
	62	"Read or generate DSA parameters, convert to DH"},
9c3bcfa0 RS	63	# endif
	64	# ifndef OPENSSL_NO_ENGINE
	65	{"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
0f113f3e	66	# endif
7e1b7485 RS	67	{NULL}
	68	};
	69
	70	int dhparam_main(int argc, char **argv)
	71	{
	72	BIO in = NULL, out = NULL;
	73	DH *dh = NULL;
3ee1eac2	74	char infile = NULL, outfile = NULL, *prog;
dd1abd44	75	ENGINE *e = NULL;
83ae8124 MC	76	#ifndef OPENSSL_NO_DSA
	77	int dsaparam = 0;
	78	#endif
	79	int i, text = 0, C = 0, ret = 1, num = 0, g = 0;
7e1b7485 RS	80	int informat = FORMAT_PEM, outformat = FORMAT_PEM, check = 0, noout = 0;
	81	OPTION_CHOICE o;
	82
	83	prog = opt_init(argc, argv, dhparam_options);
	84	while ((o = opt_next()) != OPT_EOF) {
	85	switch (o) {
	86	case OPT_EOF:
	87	case OPT_ERR:
	88	opthelp:
	89	BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
	90	goto end;
	91	case OPT_HELP:
	92	opt_help(dhparam_options);
	93	ret = 0;
	94	goto end;
	95	case OPT_INFORM:
	96	if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
	97	goto opthelp;
	98	break;
	99	case OPT_OUTFORM:
	100	if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
	101	goto opthelp;
	102	break;
	103	case OPT_IN:
	104	infile = opt_arg();
	105	break;
	106	case OPT_OUT:
	107	outfile = opt_arg();
	108	break;
	109	case OPT_ENGINE:
dd1abd44	110	e = setup_engine(opt_arg(), 0);
7e1b7485 RS	111	break;
7e1b7485 RS	112	case OPT_CHECK:
0f113f3e	113	check = 1;
7e1b7485 RS	114	break;
7e1b7485 RS	115	case OPT_TEXT:
0f113f3e	116	text = 1;
7e1b7485 RS	117	break;
7e1b7485 RS	118	case OPT_DSAPARAM:
83ae8124	119	#ifndef OPENSSL_NO_DSA
0f113f3e	120	dsaparam = 1;
83ae8124	121	#endif
7e1b7485 RS	122	break;
7e1b7485 RS	123	case OPT_C:
0f113f3e	124	C = 1;
7e1b7485 RS	125	break;
7e1b7485 RS	126	case OPT_2:
0f113f3e	127	g = 2;
7e1b7485	128	break;
a38c878c BE	129	case OPT_3:
	130	g = 3;
	131	break;
7e1b7485	132	case OPT_5:
0f113f3e	133	g = 5;
7e1b7485 RS	134	break;
	135	case OPT_NOOUT:
	136	noout = 1;
	137	break;
3ee1eac2 RS	138	case OPT_R_CASES:
	139	if (!opt_rand(o))
	140	goto end;
7e1b7485 RS	141	break;
7e1b7485 RS	142	}
0f113f3e	143	}
7e1b7485 RS	144	argc = opt_num_rest();
7e1b7485 RS	145	argv = opt_rest();
0f113f3e	146
2234212c	147	if (argv[0] != NULL && (!opt_int(argv[0], &num) \|\| num <= 0))
0f113f3e	148	goto end;
0f113f3e	149
0f113f3e MC	150	if (g && !num)
	151	num = DEFBITS;
	152
	153	# ifndef OPENSSL_NO_DSA
7e1b7485 RS	154	if (dsaparam && g) {
	155	BIO_printf(bio_err,
	156	"generator may not be chosen for DSA parameters\n");
	157	goto end;
0f113f3e	158	}
7e1b7485	159	# endif
10b37541 RL	160
	161	out = bio_open_default(outfile, 'w', outformat);
	162	if (out == NULL)
	163	goto end;
	164
7e1b7485 RS	165	/* DH parameters */
	166	if (num && !g)
	167	g = 2;
0f113f3e MC	168
	169	if (num) {
	170
	171	BN_GENCB *cb;
	172	cb = BN_GENCB_new();
96487cdd	173	if (cb == NULL) {
0f113f3e MC	174	ERR_print_errors(bio_err);
	175	goto end;
	176	}
	177
	178	BN_GENCB_set(cb, dh_cb, bio_err);
0f113f3e MC	179
	180	# ifndef OPENSSL_NO_DSA
	181	if (dsaparam) {
	182	DSA *dsa = DSA_new();
	183
	184	BIO_printf(bio_err,
	185	"Generating DSA parameters, %d bit long prime\n", num);
96487cdd	186	if (dsa == NULL
0f113f3e MC	187	\|\| !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL,
0f113f3e MC	188	cb)) {
d6407083	189	DSA_free(dsa);
0f113f3e MC	190	BN_GENCB_free(cb);
	191	ERR_print_errors(bio_err);
	192	goto end;
	193	}
	194
	195	dh = DSA_dup_DH(dsa);
	196	DSA_free(dsa);
	197	if (dh == NULL) {
	198	BN_GENCB_free(cb);
	199	ERR_print_errors(bio_err);
	200	goto end;
	201	}
	202	} else
	203	# endif
	204	{
	205	dh = DH_new();
	206	BIO_printf(bio_err,
	207	"Generating DH parameters, %d bit long safe prime, generator %d\n",
	208	num, g);
	209	BIO_printf(bio_err, "This is going to take a long time\n");
96487cdd	210	if (dh == NULL \|\| !DH_generate_parameters_ex(dh, num, g, cb)) {
0f113f3e MC	211	BN_GENCB_free(cb);
	212	ERR_print_errors(bio_err);
	213	goto end;
	214	}
	215	}
	216
	217	BN_GENCB_free(cb);
0f113f3e MC	218	} else {
0f113f3e MC	219
bdd58d98	220	in = bio_open_default(infile, 'r', informat);
7e1b7485	221	if (in == NULL)
0f113f3e	222	goto end;
0f113f3e	223
0f113f3e MC	224	# ifndef OPENSSL_NO_DSA
	225	if (dsaparam) {
	226	DSA *dsa;
	227
	228	if (informat == FORMAT_ASN1)
	229	dsa = d2i_DSAparams_bio(in, NULL);
	230	else /* informat == FORMAT_PEM */
	231	dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
	232
	233	if (dsa == NULL) {
	234	BIO_printf(bio_err, "unable to load DSA parameters\n");
	235	ERR_print_errors(bio_err);
	236	goto end;
	237	}
	238
	239	dh = DSA_dup_DH(dsa);
	240	DSA_free(dsa);
	241	if (dh == NULL) {
	242	ERR_print_errors(bio_err);
	243	goto end;
	244	}
	245	} else
	246	# endif
	247	{
18d20b5e MC	248	if (informat == FORMAT_ASN1) {
	249	/*
	250	* We have no PEM header to determine what type of DH params it
	251	* is. We'll just try both.
	252	*/
0f113f3e	253	dh = d2i_DHparams_bio(in, NULL);
18d20b5e MC	254	/* BIO_reset() returns 0 for success for file BIOs only!!! */
	255	if (dh == NULL && BIO_reset(in) == 0)
	256	dh = d2i_DHxparams_bio(in, NULL);
	257	} else {
	258	/* informat == FORMAT_PEM */
0f113f3e	259	dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
18d20b5e	260	}
0f113f3e MC	261
	262	if (dh == NULL) {
	263	BIO_printf(bio_err, "unable to load DH parameters\n");
	264	ERR_print_errors(bio_err);
	265	goto end;
	266	}
	267	}
	268
	269	/* dh != NULL */
	270	}
	271
0f113f3e MC	272	if (text) {
	273	DHparams_print(out, dh);
	274	}
	275
	276	if (check) {
	277	if (!DH_check(dh, &i)) {
	278	ERR_print_errors(bio_err);
	279	goto end;
	280	}
	281	if (i & DH_CHECK_P_NOT_PRIME)
eeb21772	282	BIO_printf(bio_err, "WARNING: p value is not prime\n");
0f113f3e	283	if (i & DH_CHECK_P_NOT_SAFE_PRIME)
eeb21772 MC	284	BIO_printf(bio_err, "WARNING: p value is not a safe prime\n");
	285	if (i & DH_CHECK_Q_NOT_PRIME)
	286	BIO_printf(bio_err, "WARNING: q value is not a prime\n");
	287	if (i & DH_CHECK_INVALID_Q_VALUE)
	288	BIO_printf(bio_err, "WARNING: q value is invalid\n");
	289	if (i & DH_CHECK_INVALID_J_VALUE)
	290	BIO_printf(bio_err, "WARNING: j value is invalid\n");
0f113f3e	291	if (i & DH_UNABLE_TO_CHECK_GENERATOR)
eeb21772 MC	292	BIO_printf(bio_err,
eeb21772 MC	293	"WARNING: unable to check the generator value\n");
0f113f3e	294	if (i & DH_NOT_SUITABLE_GENERATOR)
eeb21772	295	BIO_printf(bio_err, "WARNING: the g value is not a generator\n");
0f113f3e	296	if (i == 0)
eeb21772 MC	297	BIO_printf(bio_err, "DH parameters appear to be ok.\n");
	298	if (num != 0 && i != 0) {
	299	/*
	300	* We have generated parameters but DH_check() indicates they are
	301	* invalid! This should never happen!
	302	*/
	303	BIO_printf(bio_err, "ERROR: Invalid parameters generated\n");
	304	goto end;
	305	}
0f113f3e MC	306	}
	307	if (C) {
	308	unsigned char *data;
7e1b7485	309	int len, bits;
2ac6115d	310	const BIGNUM pbn, gbn;
0f113f3e	311
0aeddcfa MC	312	len = DH_size(dh);
	313	bits = DH_bits(dh);
	314	DH_get0_pqg(dh, &pbn, NULL, &gbn);
68dc6824	315	data = app_malloc(len, "print a BN");
201b305a BB	316
201b305a BB	317	BIO_printf(out, "static DH *get_dh%d(void)\n{\n", bits);
0aeddcfa MC	318	print_bignum_var(out, pbn, "dhp", bits, data);
	319	print_bignum_var(out, gbn, "dhg", bits, data);
	320	BIO_printf(out, " DH *dh = DH_new();\n"
201b305a	321	" BIGNUM p, g;\n"
7e1b7485 RS	322	"\n"
	323	" if (dh == NULL)\n"
	324	" return NULL;\n");
201b305a	325	BIO_printf(out, " p = BN_bin2bn(dhp_%d, sizeof(dhp_%d), NULL);\n",
0aeddcfa	326	bits, bits);
201b305a	327	BIO_printf(out, " g = BN_bin2bn(dhg_%d, sizeof(dhg_%d), NULL);\n",
0aeddcfa	328	bits, bits);
201b305a BB	329	BIO_printf(out, " if (p == NULL \|\| g == NULL\n"
201b305a BB	330	" \|\| !DH_set0_pqg(dh, p, NULL, g)) {\n"
7e1b7485	331	" DH_free(dh);\n"
201b305a BB	332	" BN_free(p);\n"
201b305a BB	333	" BN_free(g);\n"
7e1b7485 RS	334	" return NULL;\n"
7e1b7485 RS	335	" }\n");
0aeddcfa	336	if (DH_get_length(dh) > 0)
7e1b7485	337	BIO_printf(out,
0aeddcfa MC	338	" if (!DH_set_length(dh, %ld)) {\n"
0aeddcfa MC	339	" DH_free(dh);\n"
201b305a	340	" return NULL;\n"
0aeddcfa	341	" }\n", DH_get_length(dh));
7e1b7485	342	BIO_printf(out, " return dh;\n}\n");
0f113f3e MC	343	OPENSSL_free(data);
	344	}
	345
	346	if (!noout) {
2ac6115d	347	const BIGNUM *q;
0aeddcfa	348	DH_get0_pqg(dh, NULL, &q, NULL);
18d20b5e MC	349	if (outformat == FORMAT_ASN1) {
	350	if (q != NULL)
	351	i = i2d_DHxparams_bio(out, dh);
	352	else
	353	i = i2d_DHparams_bio(out, dh);
2234212c	354	} else if (q != NULL) {
7e1b7485	355	i = PEM_write_bio_DHxparams(out, dh);
2234212c	356	} else {
7e1b7485	357	i = PEM_write_bio_DHparams(out, dh);
2234212c	358	}
0f113f3e MC	359	if (!i) {
	360	BIO_printf(bio_err, "unable to write DH parameters\n");
	361	ERR_print_errors(bio_err);
	362	goto end;
	363	}
	364	}
	365	ret = 0;
	366	end:
ca3a82c3 RS	367	BIO_free(in);
ca3a82c3 RS	368	BIO_free_all(out);
d6407083	369	DH_free(dh);
dd1abd44	370	release_engine(e);
26a7d938	371	return ret;
0f113f3e	372	}
09483c58	373
6d23cf97	374	static int dh_cb(int p, int n, BN_GENCB *cb)
0f113f3e	375	{
201b305a BB	376	static const char symbols[] = ".+*\n";
	377	char c = (p >= 0 && (size_t)p < sizeof(symbols) - 1) ? symbols[p] : '?';
	378
0f113f3e MC	379	BIO_write(BN_GENCB_get_arg(cb), &c, 1);
	380	(void)BIO_flush(BN_GENCB_get_arg(cb));
	381	return 1;
	382	}
09483c58	383	#endif