[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
 */

/* We need to use some deprecated APIs */
#define OPENSSL_SUPPRESS_DEPRECATED

#include <openssl/opensslconf.h>
#if defined(OPENSSL_NO_DH) || defined(OPENSSL_NO_DEPRECATED_3_0)
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
1ddf2594 P	10	/* We need to use some deprecated APIs */
	11	#define OPENSSL_SUPPRESS_DEPRECATED
	12
effaf4de	13	#include <openssl/opensslconf.h>
1ddf2594	14	#if defined(OPENSSL_NO_DH) \|\| defined(OPENSSL_NO_DEPRECATED_3_0)
effaf4de RS	15	NON_EMPTY_TRANSLATION_UNIT
	16	#else
	17
0f113f3e MC	18	# include <stdio.h>
	19	# include <stdlib.h>
	20	# include <time.h>
	21	# include <string.h>
	22	# include "apps.h"
dab2cd68	23	# include "progs.h"
0f113f3e MC	24	# include <openssl/bio.h>
	25	# include <openssl/err.h>
	26	# include <openssl/bn.h>
	27	# include <openssl/dh.h>
	28	# include <openssl/x509.h>
	29	# include <openssl/pem.h>
	30
	31	# ifndef OPENSSL_NO_DSA
	32	# include <openssl/dsa.h>
	33	# endif
41918458	34
0f113f3e	35	# define DEFBITS 2048
09483c58	36
6d23cf97	37	static int dh_cb(int p, int n, BN_GENCB *cb);
09483c58	38
7e1b7485 RS	39	typedef enum OPTION_choice {
	40	OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
	41	OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT,
	42	OPT_ENGINE, OPT_CHECK, OPT_TEXT, OPT_NOOUT,
a38c878c	43	OPT_DSAPARAM, OPT_C, OPT_2, OPT_3, OPT_5,
3ee1eac2	44	OPT_R_ENUM
7e1b7485 RS	45	} OPTION_CHOICE;
7e1b7485 RS	46
44c83ebd	47	const OPTIONS dhparam_options[] = {
92de469f	48	{OPT_HELP_STR, 1, '-', "Usage: %s [options] [numbits]\n"},
5388f986 RS	49
5388f986 RS	50	OPT_SECTION("General"),
7e1b7485	51	{"help", OPT_HELP, '-', "Display this summary"},
5388f986 RS	52	{"check", OPT_CHECK, '-', "Check the DH parameters"},
	53	# ifndef OPENSSL_NO_DSA
	54	{"dsaparam", OPT_DSAPARAM, '-',
	55	"Read or generate DSA parameters, convert to DH"},
	56	# endif
	57	# ifndef OPENSSL_NO_ENGINE
	58	{"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
	59	# endif
	60
	61	OPT_SECTION("Input"),
7e1b7485 RS	62	{"in", OPT_IN, '<', "Input file"},
7e1b7485 RS	63	{"inform", OPT_INFORM, 'F', "Input format, DER or PEM"},
5388f986 RS	64
5388f986 RS	65	OPT_SECTION("Output"),
7e1b7485	66	{"out", OPT_OUT, '>', "Output file"},
5388f986	67	{"outform", OPT_OUTFORM, 'F', "Output format, DER or PEM"},
7e1b7485	68	{"text", OPT_TEXT, '-', "Print a text form of the DH parameters"},
16e1b281	69	{"noout", OPT_NOOUT, '-', "Don't output any DH parameters"},
7e1b7485 RS	70	{"C", OPT_C, '-', "Print C code"},
7e1b7485 RS	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,
92de469f RS	76
	77	OPT_PARAMETERS(),
	78	{"numbits", 0, 0, "Number of bits if generating parameters (optional)"},
7e1b7485 RS	79	{NULL}
	80	};
	81
	82	int dhparam_main(int argc, char **argv)
	83	{
	84	BIO in = NULL, out = NULL;
	85	DH *dh = NULL;
3ee1eac2	86	char infile = NULL, outfile = NULL, *prog;
dd1abd44	87	ENGINE *e = NULL;
83ae8124 MC	88	#ifndef OPENSSL_NO_DSA
	89	int dsaparam = 0;
	90	#endif
	91	int i, text = 0, C = 0, ret = 1, num = 0, g = 0;
7e1b7485 RS	92	int informat = FORMAT_PEM, outformat = FORMAT_PEM, check = 0, noout = 0;
	93	OPTION_CHOICE o;
	94
	95	prog = opt_init(argc, argv, dhparam_options);
	96	while ((o = opt_next()) != OPT_EOF) {
	97	switch (o) {
	98	case OPT_EOF:
	99	case OPT_ERR:
	100	opthelp:
	101	BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
	102	goto end;
	103	case OPT_HELP:
	104	opt_help(dhparam_options);
	105	ret = 0;
	106	goto end;
	107	case OPT_INFORM:
	108	if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
	109	goto opthelp;
	110	break;
	111	case OPT_OUTFORM:
	112	if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
	113	goto opthelp;
	114	break;
	115	case OPT_IN:
	116	infile = opt_arg();
	117	break;
	118	case OPT_OUT:
	119	outfile = opt_arg();
	120	break;
	121	case OPT_ENGINE:
dd1abd44	122	e = setup_engine(opt_arg(), 0);
7e1b7485 RS	123	break;
7e1b7485 RS	124	case OPT_CHECK:
0f113f3e	125	check = 1;
7e1b7485 RS	126	break;
7e1b7485 RS	127	case OPT_TEXT:
0f113f3e	128	text = 1;
7e1b7485 RS	129	break;
7e1b7485 RS	130	case OPT_DSAPARAM:
83ae8124	131	#ifndef OPENSSL_NO_DSA
0f113f3e	132	dsaparam = 1;
83ae8124	133	#endif
7e1b7485 RS	134	break;
7e1b7485 RS	135	case OPT_C:
0f113f3e	136	C = 1;
7e1b7485 RS	137	break;
7e1b7485 RS	138	case OPT_2:
0f113f3e	139	g = 2;
7e1b7485	140	break;
a38c878c BE	141	case OPT_3:
	142	g = 3;
	143	break;
7e1b7485	144	case OPT_5:
0f113f3e	145	g = 5;
7e1b7485 RS	146	break;
	147	case OPT_NOOUT:
	148	noout = 1;
	149	break;
3ee1eac2 RS	150	case OPT_R_CASES:
	151	if (!opt_rand(o))
	152	goto end;
7e1b7485 RS	153	break;
7e1b7485 RS	154	}
0f113f3e	155	}
7e1b7485 RS	156	argc = opt_num_rest();
7e1b7485 RS	157	argv = opt_rest();
0f113f3e	158
2234212c	159	if (argv[0] != NULL && (!opt_int(argv[0], &num) \|\| num <= 0))
0f113f3e	160	goto end;
0f113f3e	161
0f113f3e MC	162	if (g && !num)
	163	num = DEFBITS;
	164
	165	# ifndef OPENSSL_NO_DSA
7e1b7485 RS	166	if (dsaparam && g) {
	167	BIO_printf(bio_err,
	168	"generator may not be chosen for DSA parameters\n");
	169	goto end;
0f113f3e	170	}
7e1b7485	171	# endif
10b37541 RL	172
	173	out = bio_open_default(outfile, 'w', outformat);
	174	if (out == NULL)
	175	goto end;
	176
7e1b7485 RS	177	/* DH parameters */
	178	if (num && !g)
	179	g = 2;
0f113f3e MC	180
	181	if (num) {
	182
	183	BN_GENCB *cb;
	184	cb = BN_GENCB_new();
96487cdd	185	if (cb == NULL) {
0f113f3e MC	186	ERR_print_errors(bio_err);
	187	goto end;
	188	}
	189
	190	BN_GENCB_set(cb, dh_cb, bio_err);
0f113f3e MC	191
	192	# ifndef OPENSSL_NO_DSA
	193	if (dsaparam) {
	194	DSA *dsa = DSA_new();
	195
	196	BIO_printf(bio_err,
	197	"Generating DSA parameters, %d bit long prime\n", num);
96487cdd	198	if (dsa == NULL
0f113f3e MC	199	\|\| !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL,
0f113f3e MC	200	cb)) {
d6407083	201	DSA_free(dsa);
0f113f3e MC	202	BN_GENCB_free(cb);
	203	ERR_print_errors(bio_err);
	204	goto end;
	205	}
	206
	207	dh = DSA_dup_DH(dsa);
	208	DSA_free(dsa);
	209	if (dh == NULL) {
	210	BN_GENCB_free(cb);
	211	ERR_print_errors(bio_err);
	212	goto end;
	213	}
	214	} else
	215	# endif
	216	{
	217	dh = DH_new();
	218	BIO_printf(bio_err,
	219	"Generating DH parameters, %d bit long safe prime, generator %d\n",
	220	num, g);
	221	BIO_printf(bio_err, "This is going to take a long time\n");
96487cdd	222	if (dh == NULL \|\| !DH_generate_parameters_ex(dh, num, g, cb)) {
0f113f3e MC	223	BN_GENCB_free(cb);
	224	ERR_print_errors(bio_err);
	225	goto end;
	226	}
	227	}
	228
	229	BN_GENCB_free(cb);
0f113f3e MC	230	} else {
0f113f3e MC	231
bdd58d98	232	in = bio_open_default(infile, 'r', informat);
7e1b7485	233	if (in == NULL)
0f113f3e	234	goto end;
0f113f3e	235
0f113f3e MC	236	# ifndef OPENSSL_NO_DSA
	237	if (dsaparam) {
	238	DSA *dsa;
	239
	240	if (informat == FORMAT_ASN1)
	241	dsa = d2i_DSAparams_bio(in, NULL);
	242	else /* informat == FORMAT_PEM */
	243	dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
	244
	245	if (dsa == NULL) {
	246	BIO_printf(bio_err, "unable to load DSA parameters\n");
	247	ERR_print_errors(bio_err);
	248	goto end;
	249	}
	250
	251	dh = DSA_dup_DH(dsa);
	252	DSA_free(dsa);
	253	if (dh == NULL) {
	254	ERR_print_errors(bio_err);
	255	goto end;
	256	}
	257	} else
	258	# endif
	259	{
18d20b5e MC	260	if (informat == FORMAT_ASN1) {
	261	/*
	262	* We have no PEM header to determine what type of DH params it
	263	* is. We'll just try both.
	264	*/
0f113f3e	265	dh = d2i_DHparams_bio(in, NULL);
18d20b5e MC	266	/* BIO_reset() returns 0 for success for file BIOs only!!! */
	267	if (dh == NULL && BIO_reset(in) == 0)
	268	dh = d2i_DHxparams_bio(in, NULL);
	269	} else {
	270	/* informat == FORMAT_PEM */
0f113f3e	271	dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
18d20b5e	272	}
0f113f3e MC	273
	274	if (dh == NULL) {
	275	BIO_printf(bio_err, "unable to load DH parameters\n");
	276	ERR_print_errors(bio_err);
	277	goto end;
	278	}
	279	}
	280
	281	/* dh != NULL */
	282	}
	283
0f113f3e MC	284	if (text) {
	285	DHparams_print(out, dh);
	286	}
	287
	288	if (check) {
	289	if (!DH_check(dh, &i)) {
	290	ERR_print_errors(bio_err);
	291	goto end;
	292	}
	293	if (i & DH_CHECK_P_NOT_PRIME)
eeb21772	294	BIO_printf(bio_err, "WARNING: p value is not prime\n");
0f113f3e	295	if (i & DH_CHECK_P_NOT_SAFE_PRIME)
eeb21772 MC	296	BIO_printf(bio_err, "WARNING: p value is not a safe prime\n");
	297	if (i & DH_CHECK_Q_NOT_PRIME)
	298	BIO_printf(bio_err, "WARNING: q value is not a prime\n");
	299	if (i & DH_CHECK_INVALID_Q_VALUE)
	300	BIO_printf(bio_err, "WARNING: q value is invalid\n");
	301	if (i & DH_CHECK_INVALID_J_VALUE)
	302	BIO_printf(bio_err, "WARNING: j value is invalid\n");
0f113f3e	303	if (i & DH_UNABLE_TO_CHECK_GENERATOR)
eeb21772 MC	304	BIO_printf(bio_err,
eeb21772 MC	305	"WARNING: unable to check the generator value\n");
0f113f3e	306	if (i & DH_NOT_SUITABLE_GENERATOR)
eeb21772	307	BIO_printf(bio_err, "WARNING: the g value is not a generator\n");
0f113f3e	308	if (i == 0)
eeb21772 MC	309	BIO_printf(bio_err, "DH parameters appear to be ok.\n");
	310	if (num != 0 && i != 0) {
	311	/*
	312	* We have generated parameters but DH_check() indicates they are
	313	* invalid! This should never happen!
	314	*/
	315	BIO_printf(bio_err, "ERROR: Invalid parameters generated\n");
	316	goto end;
	317	}
0f113f3e MC	318	}
	319	if (C) {
	320	unsigned char *data;
7e1b7485	321	int len, bits;
2ac6115d	322	const BIGNUM pbn, gbn;
0f113f3e	323
0aeddcfa MC	324	len = DH_size(dh);
	325	bits = DH_bits(dh);
	326	DH_get0_pqg(dh, &pbn, NULL, &gbn);
68dc6824	327	data = app_malloc(len, "print a BN");
201b305a BB	328
201b305a BB	329	BIO_printf(out, "static DH *get_dh%d(void)\n{\n", bits);
0aeddcfa MC	330	print_bignum_var(out, pbn, "dhp", bits, data);
	331	print_bignum_var(out, gbn, "dhg", bits, data);
	332	BIO_printf(out, " DH *dh = DH_new();\n"
201b305a	333	" BIGNUM p, g;\n"
7e1b7485 RS	334	"\n"
	335	" if (dh == NULL)\n"
	336	" return NULL;\n");
201b305a	337	BIO_printf(out, " p = BN_bin2bn(dhp_%d, sizeof(dhp_%d), NULL);\n",
0aeddcfa	338	bits, bits);
201b305a	339	BIO_printf(out, " g = BN_bin2bn(dhg_%d, sizeof(dhg_%d), NULL);\n",
0aeddcfa	340	bits, bits);
201b305a BB	341	BIO_printf(out, " if (p == NULL \|\| g == NULL\n"
201b305a BB	342	" \|\| !DH_set0_pqg(dh, p, NULL, g)) {\n"
7e1b7485	343	" DH_free(dh);\n"
201b305a BB	344	" BN_free(p);\n"
201b305a BB	345	" BN_free(g);\n"
7e1b7485 RS	346	" return NULL;\n"
7e1b7485 RS	347	" }\n");
0aeddcfa	348	if (DH_get_length(dh) > 0)
7e1b7485	349	BIO_printf(out,
0aeddcfa MC	350	" if (!DH_set_length(dh, %ld)) {\n"
0aeddcfa MC	351	" DH_free(dh);\n"
201b305a	352	" return NULL;\n"
0aeddcfa	353	" }\n", DH_get_length(dh));
7e1b7485	354	BIO_printf(out, " return dh;\n}\n");
0f113f3e MC	355	OPENSSL_free(data);
	356	}
	357
	358	if (!noout) {
2ac6115d	359	const BIGNUM *q;
0aeddcfa	360	DH_get0_pqg(dh, NULL, &q, NULL);
18d20b5e MC	361	if (outformat == FORMAT_ASN1) {
	362	if (q != NULL)
	363	i = i2d_DHxparams_bio(out, dh);
	364	else
	365	i = i2d_DHparams_bio(out, dh);
2234212c	366	} else if (q != NULL) {
7e1b7485	367	i = PEM_write_bio_DHxparams(out, dh);
2234212c	368	} else {
7e1b7485	369	i = PEM_write_bio_DHparams(out, dh);
2234212c	370	}
0f113f3e MC	371	if (!i) {
	372	BIO_printf(bio_err, "unable to write DH parameters\n");
	373	ERR_print_errors(bio_err);
	374	goto end;
	375	}
	376	}
	377	ret = 0;
	378	end:
ca3a82c3 RS	379	BIO_free(in);
ca3a82c3 RS	380	BIO_free_all(out);
d6407083	381	DH_free(dh);
dd1abd44	382	release_engine(e);
26a7d938	383	return ret;
0f113f3e	384	}
09483c58	385
6d23cf97	386	static int dh_cb(int p, int n, BN_GENCB *cb)
0f113f3e	387	{
201b305a BB	388	static const char symbols[] = ".+*\n";
	389	char c = (p >= 0 && (size_t)p < sizeof(symbols) - 1) ? symbols[p] : '?';
	390
0f113f3e MC	391	BIO_write(BN_GENCB_get_arg(cb), &c, 1);
	392	(void)BIO_flush(BN_GENCB_get_arg(cb));
	393	return 1;
	394	}
09483c58	395	#endif