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

/*
 * Copyright 1995-2018 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_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) {
        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, "DSA *get_dsa%d()\n{\n", bits_p);
        print_bignum_var(bio_out, p, "dsap", len, data);
        print_bignum_var(bio_out, q, "dsaq", len, data);
        print_bignum_var(bio_out, g, "dsag", len, data);
        BIO_printf(bio_out, "    DSA *dsa = DSA_new();\n"
                            "\n");
        BIO_printf(bio_out, "    if (dsa == NULL)\n"
                            "        return NULL;\n");
        BIO_printf(bio_out, "    dsa->p = BN_bin2bn(dsap_%d, sizeof(dsap_%d), NULL);\n",
               bits_p, bits_p);
        BIO_printf(bio_out, "    dsa->q = BN_bin2bn(dsaq_%d, sizeof(dsaq_%d), NULL);\n",
               bits_p, bits_p);
        BIO_printf(bio_out, "    dsa->g = BN_bin2bn(dsag_%d, sizeof(dsag_%d), NULL);\n",
               bits_p, bits_p);
        BIO_printf(bio_out, "    if (!dsa->p || !dsa->q || !dsa->g) {\n"
                            "        DSA_free(dsa);\n"
                            "        return NULL;\n"
                            "    }\n"
                            "    return(dsa);\n}\n");
        OPENSSL_free(data);
    }

    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)
{
    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	/*
6738bf14	2	* Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
d02b48c6	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
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 MC	130	if (numbits > 0) {
0f113f3e MC	131	cb = BN_GENCB_new();
96487cdd	132	if (cb == NULL) {
0f113f3e MC	133	BIO_printf(bio_err, "Error allocating BN_GENCB object\n");
	134	goto end;
	135	}
	136	BN_GENCB_set(cb, dsa_cb, bio_err);
0f113f3e	137	dsa = DSA_new();
96487cdd	138	if (dsa == NULL) {
0f113f3e MC	139	BIO_printf(bio_err, "Error allocating DSA object\n");
	140	goto end;
	141	}
0f113f3e MC	142	BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n",
	143	num);
	144	BIO_printf(bio_err, "This could take some time\n");
0f113f3e	145	if (!DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL, cb)) {
0f113f3e MC	146	ERR_print_errors(bio_err);
	147	BIO_printf(bio_err, "Error, DSA key generation failed\n");
	148	goto end;
	149	}
2234212c	150	} else if (informat == FORMAT_ASN1) {
0f113f3e	151	dsa = d2i_DSAparams_bio(in, NULL);
2234212c	152	} else {
0f113f3e	153	dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
2234212c	154	}
0f113f3e MC	155	if (dsa == NULL) {
	156	BIO_printf(bio_err, "unable to load DSA parameters\n");
	157	ERR_print_errors(bio_err);
	158	goto end;
	159	}
	160
	161	if (text) {
	162	DSAparams_print(out, dsa);
	163	}
	164
	165	if (C) {
2ac6115d	166	const BIGNUM p = NULL, q = NULL, *g = NULL;
ae6c553e	167	unsigned char *data;
6e9fa57c MC	168	int len, bits_p;
	169
	170	DSA_get0_pqg(dsa, &p, &q, &g);
	171	len = BN_num_bytes(p);
	172	bits_p = BN_num_bits(p);
	173
ae6c553e	174	data = app_malloc(len + 20, "BN space");
0f113f3e	175
7e1b7485	176	BIO_printf(bio_out, "DSA *get_dsa%d()\n{\n", bits_p);
6e9fa57c MC	177	print_bignum_var(bio_out, p, "dsap", len, data);
	178	print_bignum_var(bio_out, q, "dsaq", len, data);
	179	print_bignum_var(bio_out, g, "dsag", len, data);
7e1b7485 RS	180	BIO_printf(bio_out, " DSA *dsa = DSA_new();\n"
	181	"\n");
	182	BIO_printf(bio_out, " if (dsa == NULL)\n"
	183	" return NULL;\n");
cbe29648	184	BIO_printf(bio_out, " dsa->p = BN_bin2bn(dsap_%d, sizeof(dsap_%d), NULL);\n",
0f113f3e	185	bits_p, bits_p);
cbe29648	186	BIO_printf(bio_out, " dsa->q = BN_bin2bn(dsaq_%d, sizeof(dsaq_%d), NULL);\n",
0f113f3e	187	bits_p, bits_p);
cbe29648	188	BIO_printf(bio_out, " dsa->g = BN_bin2bn(dsag_%d, sizeof(dsag_%d), NULL);\n",
0f113f3e	189	bits_p, bits_p);
7e1b7485 RS	190	BIO_printf(bio_out, " if (!dsa->p \|\| !dsa->q \|\| !dsa->g) {\n"
	191	" DSA_free(dsa);\n"
	192	" return NULL;\n"
	193	" }\n"
	194	" return(dsa);\n}\n");
a855d1a1	195	OPENSSL_free(data);
0f113f3e MC	196	}
	197
	198	if (!noout) {
	199	if (outformat == FORMAT_ASN1)
	200	i = i2d_DSAparams_bio(out, dsa);
7e1b7485	201	else
0f113f3e	202	i = PEM_write_bio_DSAparams(out, dsa);
0f113f3e MC	203	if (!i) {
	204	BIO_printf(bio_err, "unable to write DSA parameters\n");
	205	ERR_print_errors(bio_err);
	206	goto end;
	207	}
	208	}
	209	if (genkey) {
	210	DSA *dsakey;
	211
0f113f3e MC	212	if ((dsakey = DSAparams_dup(dsa)) == NULL)
0f113f3e MC	213	goto end;
0f113f3e MC	214	if (!DSA_generate_key(dsakey)) {
	215	ERR_print_errors(bio_err);
	216	DSA_free(dsakey);
	217	goto end;
	218	}
3b061a00	219	assert(private);
0f113f3e MC	220	if (outformat == FORMAT_ASN1)
0f113f3e MC	221	i = i2d_DSAPrivateKey_bio(out, dsakey);
7e1b7485	222	else
0f113f3e MC	223	i = PEM_write_bio_DSAPrivateKey(out, dsakey, NULL, NULL, 0, NULL,
0f113f3e MC	224	NULL);
0f113f3e MC	225	DSA_free(dsakey);
0f113f3e MC	226	}
0f113f3e MC	227	ret = 0;
0f113f3e MC	228	end:
23a1d5e9	229	BN_GENCB_free(cb);
ca3a82c3 RS	230	BIO_free(in);
ca3a82c3 RS	231	BIO_free_all(out);
d6407083	232	DSA_free(dsa);
dd1abd44	233	release_engine(e);
26a7d938	234	return ret;
0f113f3e	235	}
d02b48c6	236
6d23cf97	237	static int dsa_cb(int p, int n, BN_GENCB *cb)
0f113f3e MC	238	{
	239	char c = '*';
	240
	241	if (p == 0)
	242	c = '.';
	243	if (p == 1)
	244	c = '+';
	245	if (p == 2)
	246	c = '*';
	247	if (p == 3)
	248	c = '\n';
	249	BIO_write(BN_GENCB_get_arg(cb), &c, 1);
	250	(void)BIO_flush(BN_GENCB_get_arg(cb));
0f113f3e MC	251	return 1;
0f113f3e MC	252	}
f5d7a031	253	#endif