ec.c revision 312826 
1/* apps/ec.c */
2/*
3 * Written by Nils Larsch for the OpenSSL project.
4 */
5/* ====================================================================
6 * Copyright (c) 1998-2005 The OpenSSL Project.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in
17 *    the documentation and/or other materials provided with the
18 *    distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 *    software must display the following acknowledgment:
22 *    "This product includes software developed by the OpenSSL Project
23 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 *    endorse or promote products derived from this software without
27 *    prior written permission. For written permission, please contact
28 *    openssl-core@openssl.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 *    nor may "OpenSSL" appear in their names without prior written
32 *    permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 *    acknowledgment:
36 *    "This product includes software developed by the OpenSSL Project
37 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com).  This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59#include <openssl/opensslconf.h>
60#ifndef OPENSSL_NO_EC
61# include <stdio.h>
62# include <stdlib.h>
63# include <string.h>
64# include "apps.h"
65# include <openssl/bio.h>
66# include <openssl/err.h>
67# include <openssl/evp.h>
68# include <openssl/pem.h>
69
70# undef PROG
71# define PROG    ec_main
72
73/*-
74 * -inform arg    - input format - default PEM (one of DER, NET or PEM)
75 * -outform arg   - output format - default PEM
76 * -in arg        - input file - default stdin
77 * -out arg       - output file - default stdout
78 * -des           - encrypt output if PEM format with DES in cbc mode
79 * -text          - print a text version
80 * -param_out     - print the elliptic curve parameters
81 * -conv_form arg - specifies the point encoding form
82 * -param_enc arg - specifies the parameter encoding
83 */
84
85int MAIN(int, char **);
86
87int MAIN(int argc, char **argv)
88{
89    int ret = 1;
90    EC_KEY *eckey = NULL;
91    const EC_GROUP *group;
92    int i, badops = 0;
93    const EVP_CIPHER *enc = NULL;
94    BIO *in = NULL, *out = NULL;
95    int informat, outformat, text = 0, noout = 0;
96    int pubin = 0, pubout = 0, param_out = 0;
97    char *infile, *outfile, *prog, *engine;
98    ENGINE *e = NULL;
99    char *passargin = NULL, *passargout = NULL;
100    char *passin = NULL, *passout = NULL;
101    point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
102    int new_form = 0;
103    int asn1_flag = OPENSSL_EC_NAMED_CURVE;
104    int new_asn1_flag = 0;
105
106    apps_startup();
107
108    if (bio_err == NULL)
109        if ((bio_err = BIO_new(BIO_s_file())) != NULL)
110            BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
111
112    if (!load_config(bio_err, NULL))
113        goto end;
114
115    engine = NULL;
116    infile = NULL;
117    outfile = NULL;
118    informat = FORMAT_PEM;
119    outformat = FORMAT_PEM;
120
121    prog = argv[0];
122    argc--;
123    argv++;
124    while (argc >= 1) {
125        if (strcmp(*argv, "-inform") == 0) {
126            if (--argc < 1)
127                goto bad;
128            informat = str2fmt(*(++argv));
129        } else if (strcmp(*argv, "-outform") == 0) {
130            if (--argc < 1)
131                goto bad;
132            outformat = str2fmt(*(++argv));
133        } else if (strcmp(*argv, "-in") == 0) {
134            if (--argc < 1)
135                goto bad;
136            infile = *(++argv);
137        } else if (strcmp(*argv, "-out") == 0) {
138            if (--argc < 1)
139                goto bad;
140            outfile = *(++argv);
141        } else if (strcmp(*argv, "-passin") == 0) {
142            if (--argc < 1)
143                goto bad;
144            passargin = *(++argv);
145        } else if (strcmp(*argv, "-passout") == 0) {
146            if (--argc < 1)
147                goto bad;
148            passargout = *(++argv);
149        } else if (strcmp(*argv, "-engine") == 0) {
150            if (--argc < 1)
151                goto bad;
152            engine = *(++argv);
153        } else if (strcmp(*argv, "-noout") == 0)
154            noout = 1;
155        else if (strcmp(*argv, "-text") == 0)
156            text = 1;
157        else if (strcmp(*argv, "-conv_form") == 0) {
158            if (--argc < 1)
159                goto bad;
160            ++argv;
161            new_form = 1;
162            if (strcmp(*argv, "compressed") == 0)
163                form = POINT_CONVERSION_COMPRESSED;
164            else if (strcmp(*argv, "uncompressed") == 0)
165                form = POINT_CONVERSION_UNCOMPRESSED;
166            else if (strcmp(*argv, "hybrid") == 0)
167                form = POINT_CONVERSION_HYBRID;
168            else
169                goto bad;
170        } else if (strcmp(*argv, "-param_enc") == 0) {
171            if (--argc < 1)
172                goto bad;
173            ++argv;
174            new_asn1_flag = 1;
175            if (strcmp(*argv, "named_curve") == 0)
176                asn1_flag = OPENSSL_EC_NAMED_CURVE;
177            else if (strcmp(*argv, "explicit") == 0)
178                asn1_flag = 0;
179            else
180                goto bad;
181        } else if (strcmp(*argv, "-param_out") == 0)
182            param_out = 1;
183        else if (strcmp(*argv, "-pubin") == 0)
184            pubin = 1;
185        else if (strcmp(*argv, "-pubout") == 0)
186            pubout = 1;
187        else if ((enc = EVP_get_cipherbyname(&(argv[0][1]))) == NULL) {
188            BIO_printf(bio_err, "unknown option %s\n", *argv);
189            badops = 1;
190            break;
191        }
192        argc--;
193        argv++;
194    }
195
196    if (badops) {
197 bad:
198        BIO_printf(bio_err, "%s [options] <infile >outfile\n", prog);
199        BIO_printf(bio_err, "where options are\n");
200        BIO_printf(bio_err, " -inform arg     input format - "
201                   "DER or PEM\n");
202        BIO_printf(bio_err, " -outform arg    output format - "
203                   "DER or PEM\n");
204        BIO_printf(bio_err, " -in arg         input file\n");
205        BIO_printf(bio_err, " -passin arg     input file pass "
206                   "phrase source\n");
207        BIO_printf(bio_err, " -out arg        output file\n");
208        BIO_printf(bio_err, " -passout arg    output file pass "
209                   "phrase source\n");
210        BIO_printf(bio_err, " -engine e       use engine e, "
211                   "possibly a hardware device.\n");
212        BIO_printf(bio_err, " -des            encrypt PEM output, "
213                   "instead of 'des' every other \n"
214                   "                 cipher "
215                   "supported by OpenSSL can be used\n");
216        BIO_printf(bio_err, " -text           print the key\n");
217        BIO_printf(bio_err, " -noout          don't print key out\n");
218        BIO_printf(bio_err, " -param_out      print the elliptic "
219                   "curve parameters\n");
220        BIO_printf(bio_err, " -conv_form arg  specifies the "
221                   "point conversion form \n");
222        BIO_printf(bio_err, "                 possible values:"
223                   " compressed\n");
224        BIO_printf(bio_err, "                                 "
225                   " uncompressed (default)\n");
226        BIO_printf(bio_err, "                                  " " hybrid\n");
227        BIO_printf(bio_err, " -param_enc arg  specifies the way"
228                   " the ec parameters are encoded\n");
229        BIO_printf(bio_err, "                 in the asn1 der " "encoding\n");
230        BIO_printf(bio_err, "                 possible values:"
231                   " named_curve (default)\n");
232        BIO_printf(bio_err, "                                  "
233                   "explicit\n");
234        goto end;
235    }
236
237    ERR_load_crypto_strings();
238
239    e = setup_engine(bio_err, engine, 0);
240
241    if (!app_passwd(bio_err, passargin, passargout, &passin, &passout)) {
242        BIO_printf(bio_err, "Error getting passwords\n");
243        goto end;
244    }
245
246    in = BIO_new(BIO_s_file());
247    out = BIO_new(BIO_s_file());
248    if ((in == NULL) || (out == NULL)) {
249        ERR_print_errors(bio_err);
250        goto end;
251    }
252
253    if (infile == NULL)
254        BIO_set_fp(in, stdin, BIO_NOCLOSE);
255    else {
256        if (BIO_read_filename(in, infile) <= 0) {
257            perror(infile);
258            goto end;
259        }
260    }
261
262    BIO_printf(bio_err, "read EC key\n");
263    if (informat == FORMAT_ASN1) {
264        if (pubin)
265            eckey = d2i_EC_PUBKEY_bio(in, NULL);
266        else
267            eckey = d2i_ECPrivateKey_bio(in, NULL);
268    } else if (informat == FORMAT_PEM) {
269        if (pubin)
270            eckey = PEM_read_bio_EC_PUBKEY(in, NULL, NULL, NULL);
271        else
272            eckey = PEM_read_bio_ECPrivateKey(in, NULL, NULL, passin);
273    } else {
274        BIO_printf(bio_err, "bad input format specified for key\n");
275        goto end;
276    }
277    if (eckey == NULL) {
278        BIO_printf(bio_err, "unable to load Key\n");
279        ERR_print_errors(bio_err);
280        goto end;
281    }
282
283    if (outfile == NULL) {
284        BIO_set_fp(out, stdout, BIO_NOCLOSE);
285# ifdef OPENSSL_SYS_VMS
286        {
287            BIO *tmpbio = BIO_new(BIO_f_linebuffer());
288            out = BIO_push(tmpbio, out);
289        }
290# endif
291    } else {
292        if (BIO_write_filename(out, outfile) <= 0) {
293            perror(outfile);
294            goto end;
295        }
296    }
297
298    group = EC_KEY_get0_group(eckey);
299
300    if (new_form)
301        EC_KEY_set_conv_form(eckey, form);
302
303    if (new_asn1_flag)
304        EC_KEY_set_asn1_flag(eckey, asn1_flag);
305
306    if (text)
307        if (!EC_KEY_print(out, eckey, 0)) {
308            perror(outfile);
309            ERR_print_errors(bio_err);
310            goto end;
311        }
312
313    if (noout) {
314        ret = 0;
315        goto end;
316    }
317
318    BIO_printf(bio_err, "writing EC key\n");
319    if (outformat == FORMAT_ASN1) {
320        if (param_out)
321            i = i2d_ECPKParameters_bio(out, group);
322        else if (pubin || pubout)
323            i = i2d_EC_PUBKEY_bio(out, eckey);
324        else
325            i = i2d_ECPrivateKey_bio(out, eckey);
326    } else if (outformat == FORMAT_PEM) {
327        if (param_out)
328            i = PEM_write_bio_ECPKParameters(out, group);
329        else if (pubin || pubout)
330            i = PEM_write_bio_EC_PUBKEY(out, eckey);
331        else
332            i = PEM_write_bio_ECPrivateKey(out, eckey, enc,
333                                           NULL, 0, NULL, passout);
334    } else {
335        BIO_printf(bio_err, "bad output format specified for " "outfile\n");
336        goto end;
337    }
338
339    if (!i) {
340        BIO_printf(bio_err, "unable to write private key\n");
341        ERR_print_errors(bio_err);
342    } else
343        ret = 0;
344 end:
345    if (in)
346        BIO_free(in);
347    if (out)
348        BIO_free_all(out);
349    if (eckey)
350        EC_KEY_free(eckey);
351    release_engine(e);
352    if (passin)
353        OPENSSL_free(passin);
354    if (passout)
355        OPENSSL_free(passout);
356    apps_shutdown();
357    OPENSSL_EXIT(ret);
358}
359#else                           /* !OPENSSL_NO_EC */
360
361# if PEDANTIC
362static void *dummy = &dummy;
363# endif
364
365#endif
366