[thirdparty/openssl.git] / apps / dsaparam.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_DSA
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/dsa.h>
# include <openssl/x509.h>
# include <openssl/pem.h>

static int dsa_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_TEXT, OPT_C,
    OPT_NOOUT, OPT_GENKEY, OPT_ENGINE, OPT_R_ENUM
} OPTION_CHOICE;

const OPTIONS dsaparam_options[] = {
    {"help", OPT_HELP, '-', "Display this summary"},
    {"inform", OPT_INFORM, 'F', "Input format - DER or PEM"},
    {"in", OPT_IN, '<', "Input file"},
    {"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
    {"out", OPT_OUT, '>', "Output file"},
    {"text", OPT_TEXT, '-', "Print as text"},
    {"C", OPT_C, '-', "Output C code"},
    {"noout", OPT_NOOUT, '-', "No output"},
    {"genkey", OPT_GENKEY, '-', "Generate a DSA key"},
    OPT_R_OPTIONS,
# ifndef OPENSSL_NO_ENGINE
    {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
# endif
    {NULL}
};

int dsaparam_main(int argc, char **argv)
{
    ENGINE *e = NULL;
    DSA *dsa = NULL;
    BIO *in = NULL, *out = NULL;
    BN_GENCB *cb = NULL;
    int numbits = -1, num = 0, genkey = 0;
    int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0, C = 0;
    int ret = 1, i, text = 0, private = 0;
    char *infile = NULL, *outfile = NULL, *prog;
    OPTION_CHOICE o;

    prog = opt_init(argc, argv, dsaparam_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(dsaparam_options);
            ret = 0;
            goto end;
        case OPT_INFORM:
            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
                goto opthelp;
            break;
        case OPT_IN:
            infile = opt_arg();
            break;
        case OPT_OUTFORM:
            if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
                goto opthelp;
            break;
        case OPT_OUT:
            outfile = opt_arg();
            break;
        case OPT_ENGINE:
            e = setup_engine(opt_arg(), 0);
            break;
        case OPT_TEXT:
            text = 1;
            break;
        case OPT_C:
            C = 1;
            break;
        case OPT_GENKEY:
            genkey = 1;
            break;
        case OPT_R_CASES:
            if (!opt_rand(o))
                goto end;
            break;
        case OPT_NOOUT:
            noout = 1;
            break;
        }
    }
    argc = opt_num_rest();
    argv = opt_rest();

    if (argc == 1) {
        if (!opt_int(argv[0], &num) || num < 0)
            goto end;
        /* generate a key */
        numbits = num;
    }
    private = genkey ? 1 : 0;

    in = bio_open_default(infile, 'r', informat);
    if (in == NULL)
        goto end;
    out = bio_open_owner(outfile, outformat, private);
    if (out == NULL)
        goto end;

    if (numbits > 0) {
        if (numbits > OPENSSL_DSA_MAX_MODULUS_BITS)
            BIO_printf(bio_err,
                       "Warning: It is not recommended to use more than %d bit for DSA keys.\n"
                       "         Your key size is %d! Larger key size may behave not as expected.\n",
                       OPENSSL_DSA_MAX_MODULUS_BITS, numbits);

        cb = BN_GENCB_new();
        if (cb == NULL) {
            BIO_printf(bio_err, "Error allocating BN_GENCB object\n");
            goto end;
        }
        BN_GENCB_set(cb, dsa_cb, bio_err);
        dsa = DSA_new();
        if (dsa == NULL) {
            BIO_printf(bio_err, "Error allocating DSA object\n");
            goto end;
        }
        BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n",
                   num);
        BIO_printf(bio_err, "This could take some time\n");
        if (!DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL, cb)) {
            ERR_print_errors(bio_err);
            BIO_printf(bio_err, "Error, DSA key generation failed\n");
            goto end;
        }
    } else if (informat == FORMAT_ASN1) {
        dsa = d2i_DSAparams_bio(in, NULL);
    } else {
        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;
    }

    if (text) {
        DSAparams_print(out, dsa);
    }

    if (C) {
        const BIGNUM *p = NULL, *q = NULL, *g = NULL;
        unsigned char *data;
        int len, bits_p;

        DSA_get0_pqg(dsa, &p, &q, &g);
        len = BN_num_bytes(p);
        bits_p = BN_num_bits(p);

        data = app_malloc(len + 20, "BN space");

        BIO_printf(bio_out, "static DSA *get_dsa%d(void)\n{\n", bits_p);
        print_bignum_var(bio_out, p, "dsap", bits_p, data);
        print_bignum_var(bio_out, q, "dsaq", bits_p, data);
        print_bignum_var(bio_out, g, "dsag", bits_p, data);
        BIO_printf(bio_out, "    DSA *dsa = DSA_new();\n"
                            "    BIGNUM *p, *q, *g;\n"
                            "\n");
        BIO_printf(bio_out, "    if (dsa == NULL)\n"
                            "        return NULL;\n");
        BIO_printf(bio_out, "    if (!DSA_set0_pqg(dsa, p = BN_bin2bn(dsap_%d, sizeof(dsap_%d), NULL),\n",
                   bits_p, bits_p);
        BIO_printf(bio_out, "                           q = BN_bin2bn(dsaq_%d, sizeof(dsaq_%d), NULL),\n",
                   bits_p, bits_p);
        BIO_printf(bio_out, "                           g = BN_bin2bn(dsag_%d, sizeof(dsag_%d), NULL))) {\n",
                   bits_p, bits_p);
        BIO_printf(bio_out, "        DSA_free(dsa);\n"
                            "        BN_free(p);\n"
                            "        BN_free(q);\n"
                            "        BN_free(g);\n"
                            "        return NULL;\n"
                            "    }\n"
                            "    return dsa;\n}\n");
        OPENSSL_free(data);
    }

    if (outformat == FORMAT_ASN1 && genkey)
        noout = 1;

    if (!noout) {
        if (outformat == FORMAT_ASN1)
            i = i2d_DSAparams_bio(out, dsa);
        else
            i = PEM_write_bio_DSAparams(out, dsa);
        if (!i) {
            BIO_printf(bio_err, "unable to write DSA parameters\n");
            ERR_print_errors(bio_err);
            goto end;
        }
    }
    if (genkey) {
        DSA *dsakey;

        if ((dsakey = DSAparams_dup(dsa)) == NULL)
            goto end;
        if (!DSA_generate_key(dsakey)) {
            ERR_print_errors(bio_err);
            DSA_free(dsakey);
            goto end;
        }
        assert(private);
        if (outformat == FORMAT_ASN1)
            i = i2d_DSAPrivateKey_bio(out, dsakey);
        else
            i = PEM_write_bio_DSAPrivateKey(out, dsakey, NULL, NULL, 0, NULL,
                                            NULL);
        DSA_free(dsakey);
    }
    ret = 0;
 end:
    BN_GENCB_free(cb);
    BIO_free(in);
    BIO_free_all(out);
    DSA_free(dsa);
    release_engine(e);
    return ret;
}

static int dsa_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.
d02b48c6	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
d02b48c6 RE	8	*/
d02b48c6 RE	9
effaf4de RS	10	#include <openssl/opensslconf.h>
	11	#ifdef OPENSSL_NO_DSA
	12	NON_EMPTY_TRANSLATION_UNIT
	13	#else
5daec7ea	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/dsa.h>
	25	# include <openssl/x509.h>
	26	# include <openssl/pem.h>
	27
6d23cf97	28	static int dsa_cb(int p, int n, BN_GENCB *cb);
667ac4ec	29
7e1b7485 RS	30	typedef enum OPTION_choice {
	31	OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
	32	OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT, OPT_TEXT, OPT_C,
3ee1eac2	33	OPT_NOOUT, OPT_GENKEY, OPT_ENGINE, OPT_R_ENUM
7e1b7485 RS	34	} OPTION_CHOICE;
7e1b7485 RS	35
44c83ebd	36	const OPTIONS dsaparam_options[] = {
7e1b7485 RS	37	{"help", OPT_HELP, '-', "Display this summary"},
	38	{"inform", OPT_INFORM, 'F', "Input format - DER or PEM"},
	39	{"in", OPT_IN, '<', "Input file"},
	40	{"outform", OPT_OUTFORM, 'F', "Output format - DER or PEM"},
	41	{"out", OPT_OUT, '>', "Output file"},
	42	{"text", OPT_TEXT, '-', "Print as text"},
	43	{"C", OPT_C, '-', "Output C code"},
	44	{"noout", OPT_NOOUT, '-', "No output"},
	45	{"genkey", OPT_GENKEY, '-', "Generate a DSA key"},
3ee1eac2	46	OPT_R_OPTIONS,
9c3bcfa0 RS	47	# ifndef OPENSSL_NO_ENGINE
9c3bcfa0 RS	48	{"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
7e1b7485 RS	49	# endif
	50	{NULL}
	51	};
667ac4ec	52
7e1b7485	53	int dsaparam_main(int argc, char **argv)
0f113f3e	54	{
dd1abd44	55	ENGINE *e = NULL;
0f113f3e	56	DSA *dsa = NULL;
0f113f3e	57	BIO in = NULL, out = NULL;
0f113f3e	58	BN_GENCB *cb = NULL;
3ee1eac2	59	int numbits = -1, num = 0, genkey = 0;
3b061a00 RS	60	int informat = FORMAT_PEM, outformat = FORMAT_PEM, noout = 0, C = 0;
3b061a00 RS	61	int ret = 1, i, text = 0, private = 0;
3ee1eac2	62	char infile = NULL, outfile = NULL, *prog;
7e1b7485 RS	63	OPTION_CHOICE o;
	64
	65	prog = opt_init(argc, argv, dsaparam_options);
	66	while ((o = opt_next()) != OPT_EOF) {
	67	switch (o) {
	68	case OPT_EOF:
	69	case OPT_ERR:
	70	opthelp:
	71	BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
	72	goto end;
	73	case OPT_HELP:
	74	opt_help(dsaparam_options);
	75	ret = 0;
	76	goto end;
	77	case OPT_INFORM:
	78	if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &informat))
	79	goto opthelp;
	80	break;
	81	case OPT_IN:
	82	infile = opt_arg();
	83	break;
	84	case OPT_OUTFORM:
	85	if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
	86	goto opthelp;
	87	break;
	88	case OPT_OUT:
	89	outfile = opt_arg();
	90	break;
	91	case OPT_ENGINE:
dd1abd44	92	e = setup_engine(opt_arg(), 0);
7e1b7485	93	break;
7e1b7485	94	case OPT_TEXT:
0f113f3e	95	text = 1;
7e1b7485 RS	96	break;
7e1b7485 RS	97	case OPT_C:
0f113f3e	98	C = 1;
7e1b7485 RS	99	break;
7e1b7485 RS	100	case OPT_GENKEY:
3ee1eac2	101	genkey = 1;
7e1b7485	102	break;
3ee1eac2 RS	103	case OPT_R_CASES:
	104	if (!opt_rand(o))
	105	goto end;
7e1b7485 RS	106	break;
7e1b7485 RS	107	case OPT_NOOUT:
0f113f3e	108	noout = 1;
7e1b7485	109	break;
0f113f3e	110	}
0f113f3e	111	}
7e1b7485 RS	112	argc = opt_num_rest();
7e1b7485 RS	113	argv = opt_rest();
0f113f3e	114
7e1b7485	115	if (argc == 1) {
bd4850df	116	if (!opt_int(argv[0], &num) \|\| num < 0)
7e1b7485 RS	117	goto end;
	118	/* generate a key */
	119	numbits = num;
0f113f3e	120	}
3b061a00	121	private = genkey ? 1 : 0;
0f113f3e	122
bdd58d98	123	in = bio_open_default(infile, 'r', informat);
7e1b7485 RS	124	if (in == NULL)
7e1b7485 RS	125	goto end;
bdd58d98	126	out = bio_open_owner(outfile, outformat, private);
7e1b7485	127	if (out == NULL)
0f113f3e	128	goto end;
0f113f3e	129
0f113f3e	130	if (numbits > 0) {
0336df2f GS	131	if (numbits > OPENSSL_DSA_MAX_MODULUS_BITS)
	132	BIO_printf(bio_err,
	133	"Warning: It is not recommended to use more than %d bit for DSA keys.\n"
	134	" Your key size is %d! Larger key size may behave not as expected.\n",
	135	OPENSSL_DSA_MAX_MODULUS_BITS, numbits);
	136
0f113f3e	137	cb = BN_GENCB_new();
96487cdd	138	if (cb == NULL) {
0f113f3e MC	139	BIO_printf(bio_err, "Error allocating BN_GENCB object\n");
	140	goto end;
	141	}
	142	BN_GENCB_set(cb, dsa_cb, bio_err);
0f113f3e	143	dsa = DSA_new();
96487cdd	144	if (dsa == NULL) {
0f113f3e MC	145	BIO_printf(bio_err, "Error allocating DSA object\n");
	146	goto end;
	147	}
0f113f3e MC	148	BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n",
	149	num);
	150	BIO_printf(bio_err, "This could take some time\n");
0f113f3e	151	if (!DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL, cb)) {
0f113f3e MC	152	ERR_print_errors(bio_err);
	153	BIO_printf(bio_err, "Error, DSA key generation failed\n");
	154	goto end;
	155	}
2234212c	156	} else if (informat == FORMAT_ASN1) {
0f113f3e	157	dsa = d2i_DSAparams_bio(in, NULL);
2234212c	158	} else {
0f113f3e	159	dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
2234212c	160	}
0f113f3e MC	161	if (dsa == NULL) {
	162	BIO_printf(bio_err, "unable to load DSA parameters\n");
	163	ERR_print_errors(bio_err);
	164	goto end;
	165	}
	166
	167	if (text) {
	168	DSAparams_print(out, dsa);
	169	}
	170
	171	if (C) {
2ac6115d	172	const BIGNUM p = NULL, q = NULL, *g = NULL;
ae6c553e	173	unsigned char *data;
6e9fa57c MC	174	int len, bits_p;
	175
	176	DSA_get0_pqg(dsa, &p, &q, &g);
	177	len = BN_num_bytes(p);
	178	bits_p = BN_num_bits(p);
	179
ae6c553e	180	data = app_malloc(len + 20, "BN space");
0f113f3e	181
d6b50b6e	182	BIO_printf(bio_out, "static DSA *get_dsa%d(void)\n{\n", bits_p);
708c28f2 AP	183	print_bignum_var(bio_out, p, "dsap", bits_p, data);
	184	print_bignum_var(bio_out, q, "dsaq", bits_p, data);
	185	print_bignum_var(bio_out, g, "dsag", bits_p, data);
7e1b7485	186	BIO_printf(bio_out, " DSA *dsa = DSA_new();\n"
708c28f2	187	" BIGNUM p, q, *g;\n"
7e1b7485 RS	188	"\n");
	189	BIO_printf(bio_out, " if (dsa == NULL)\n"
	190	" return NULL;\n");
708c28f2 AP	191	BIO_printf(bio_out, " if (!DSA_set0_pqg(dsa, p = BN_bin2bn(dsap_%d, sizeof(dsap_%d), NULL),\n",
	192	bits_p, bits_p);
	193	BIO_printf(bio_out, " q = BN_bin2bn(dsaq_%d, sizeof(dsaq_%d), NULL),\n",
	194	bits_p, bits_p);
	195	BIO_printf(bio_out, " g = BN_bin2bn(dsag_%d, sizeof(dsag_%d), NULL))) {\n",
	196	bits_p, bits_p);
	197	BIO_printf(bio_out, " DSA_free(dsa);\n"
	198	" BN_free(p);\n"
	199	" BN_free(q);\n"
	200	" BN_free(g);\n"
7e1b7485 RS	201	" return NULL;\n"
7e1b7485 RS	202	" }\n"
708c28f2	203	" return dsa;\n}\n");
a855d1a1	204	OPENSSL_free(data);
0f113f3e MC	205	}
0f113f3e MC	206
52814352 BE	207	if (outformat == FORMAT_ASN1 && genkey)
	208	noout = 1;
	209
0f113f3e MC	210	if (!noout) {
	211	if (outformat == FORMAT_ASN1)
	212	i = i2d_DSAparams_bio(out, dsa);
7e1b7485	213	else
0f113f3e	214	i = PEM_write_bio_DSAparams(out, dsa);
0f113f3e MC	215	if (!i) {
	216	BIO_printf(bio_err, "unable to write DSA parameters\n");
	217	ERR_print_errors(bio_err);
	218	goto end;
	219	}
	220	}
	221	if (genkey) {
	222	DSA *dsakey;
	223
0f113f3e MC	224	if ((dsakey = DSAparams_dup(dsa)) == NULL)
0f113f3e MC	225	goto end;
0f113f3e MC	226	if (!DSA_generate_key(dsakey)) {
	227	ERR_print_errors(bio_err);
	228	DSA_free(dsakey);
	229	goto end;
	230	}
3b061a00	231	assert(private);
0f113f3e MC	232	if (outformat == FORMAT_ASN1)
0f113f3e MC	233	i = i2d_DSAPrivateKey_bio(out, dsakey);
7e1b7485	234	else
0f113f3e MC	235	i = PEM_write_bio_DSAPrivateKey(out, dsakey, NULL, NULL, 0, NULL,
0f113f3e MC	236	NULL);
0f113f3e MC	237	DSA_free(dsakey);
0f113f3e MC	238	}
0f113f3e MC	239	ret = 0;
0f113f3e MC	240	end:
23a1d5e9	241	BN_GENCB_free(cb);
ca3a82c3 RS	242	BIO_free(in);
ca3a82c3 RS	243	BIO_free_all(out);
d6407083	244	DSA_free(dsa);
dd1abd44	245	release_engine(e);
26a7d938	246	return ret;
0f113f3e	247	}
d02b48c6	248
6d23cf97	249	static int dsa_cb(int p, int n, BN_GENCB *cb)
0f113f3e	250	{
201b305a BB	251	static const char symbols[] = ".+*\n";
201b305a BB	252	char c = (p >= 0 && (size_t)p < sizeof(symbols) - 1) ? symbols[p] : '?';
0f113f3e	253
0f113f3e MC	254	BIO_write(BN_GENCB_get_arg(cb), &c, 1);
0f113f3e MC	255	(void)BIO_flush(BN_GENCB_get_arg(cb));
0f113f3e MC	256	return 1;
0f113f3e MC	257	}
f5d7a031	258	#endif