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ec.c
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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  * [email protected].
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  * ([email protected]). This product includes software written by Tim
55  * Hudson ([email protected]).
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 /* -inform arg - input format - default PEM (one of DER, NET or PEM)
74  * -outform arg - output format - default PEM
75  * -in arg - input file - default stdin
76  * -out arg - output file - default stdout
77  * -des - encrypt output if PEM format with DES in cbc mode
78  * -text - print a text version
79  * -param_out - print the elliptic curve parameters
80  * -conv_form arg - specifies the point encoding form
81  * -param_enc arg - specifies the parameter encoding
82  */
83 
84 int MAIN(int, char **);
85 
86 int MAIN(int argc, char **argv)
87 {
88  int ret = 1;
89  EC_KEY *eckey = NULL;
90  const EC_GROUP *group;
91  int i, badops = 0;
92  const EVP_CIPHER *enc = NULL;
93  BIO *in = NULL, *out = NULL;
94  int informat, outformat, text=0, noout=0;
95  int pubin = 0, pubout = 0, param_out = 0;
96  char *infile, *outfile, *prog, *engine;
97  char *passargin = NULL, *passargout = NULL;
98  char *passin = NULL, *passout = NULL;
99  point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
100  int new_form = 0;
101  int asn1_flag = OPENSSL_EC_NAMED_CURVE;
102  int new_asn1_flag = 0;
103 
104  apps_startup();
105 
106  if (bio_err == NULL)
107  if ((bio_err=BIO_new(BIO_s_file())) != NULL)
108  BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT);
109 
110  if (!load_config(bio_err, NULL))
111  goto end;
112 
113  engine = NULL;
114  infile = NULL;
115  outfile = NULL;
116  informat = FORMAT_PEM;
117  outformat = FORMAT_PEM;
118 
119  prog = argv[0];
120  argc--;
121  argv++;
122  while (argc >= 1)
123  {
124  if (strcmp(*argv,"-inform") == 0)
125  {
126  if (--argc < 1) goto bad;
127  informat=str2fmt(*(++argv));
128  }
129  else if (strcmp(*argv,"-outform") == 0)
130  {
131  if (--argc < 1) goto bad;
132  outformat=str2fmt(*(++argv));
133  }
134  else if (strcmp(*argv,"-in") == 0)
135  {
136  if (--argc < 1) goto bad;
137  infile= *(++argv);
138  }
139  else if (strcmp(*argv,"-out") == 0)
140  {
141  if (--argc < 1) goto bad;
142  outfile= *(++argv);
143  }
144  else if (strcmp(*argv,"-passin") == 0)
145  {
146  if (--argc < 1) goto bad;
147  passargin= *(++argv);
148  }
149  else if (strcmp(*argv,"-passout") == 0)
150  {
151  if (--argc < 1) goto bad;
152  passargout= *(++argv);
153  }
154  else if (strcmp(*argv, "-engine") == 0)
155  {
156  if (--argc < 1) goto bad;
157  engine= *(++argv);
158  }
159  else if (strcmp(*argv, "-noout") == 0)
160  noout = 1;
161  else if (strcmp(*argv, "-text") == 0)
162  text = 1;
163  else if (strcmp(*argv, "-conv_form") == 0)
164  {
165  if (--argc < 1)
166  goto bad;
167  ++argv;
168  new_form = 1;
169  if (strcmp(*argv, "compressed") == 0)
170  form = POINT_CONVERSION_COMPRESSED;
171  else if (strcmp(*argv, "uncompressed") == 0)
172  form = POINT_CONVERSION_UNCOMPRESSED;
173  else if (strcmp(*argv, "hybrid") == 0)
174  form = POINT_CONVERSION_HYBRID;
175  else
176  goto bad;
177  }
178  else if (strcmp(*argv, "-param_enc") == 0)
179  {
180  if (--argc < 1)
181  goto bad;
182  ++argv;
183  new_asn1_flag = 1;
184  if (strcmp(*argv, "named_curve") == 0)
185  asn1_flag = OPENSSL_EC_NAMED_CURVE;
186  else if (strcmp(*argv, "explicit") == 0)
187  asn1_flag = 0;
188  else
189  goto bad;
190  }
191  else if (strcmp(*argv, "-param_out") == 0)
192  param_out = 1;
193  else if (strcmp(*argv, "-pubin") == 0)
194  pubin=1;
195  else if (strcmp(*argv, "-pubout") == 0)
196  pubout=1;
197  else if ((enc=EVP_get_cipherbyname(&(argv[0][1]))) == NULL)
198  {
199  BIO_printf(bio_err, "unknown option %s\n", *argv);
200  badops=1;
201  break;
202  }
203  argc--;
204  argv++;
205  }
206 
207  if (badops)
208  {
209 bad:
210  BIO_printf(bio_err, "%s [options] <infile >outfile\n", prog);
211  BIO_printf(bio_err, "where options are\n");
212  BIO_printf(bio_err, " -inform arg input format - "
213  "DER or PEM\n");
214  BIO_printf(bio_err, " -outform arg output format - "
215  "DER or PEM\n");
216  BIO_printf(bio_err, " -in arg input file\n");
217  BIO_printf(bio_err, " -passin arg input file pass "
218  "phrase source\n");
219  BIO_printf(bio_err, " -out arg output file\n");
220  BIO_printf(bio_err, " -passout arg output file pass "
221  "phrase source\n");
222  BIO_printf(bio_err, " -engine e use engine e, "
223  "possibly a hardware device.\n");
224  BIO_printf(bio_err, " -des encrypt PEM output, "
225  "instead of 'des' every other \n"
226  " cipher "
227  "supported by OpenSSL can be used\n");
228  BIO_printf(bio_err, " -text print the key\n");
229  BIO_printf(bio_err, " -noout don't print key out\n");
230  BIO_printf(bio_err, " -param_out print the elliptic "
231  "curve parameters\n");
232  BIO_printf(bio_err, " -conv_form arg specifies the "
233  "point conversion form \n");
234  BIO_printf(bio_err, " possible values:"
235  " compressed\n");
236  BIO_printf(bio_err, " "
237  " uncompressed (default)\n");
238  BIO_printf(bio_err, " "
239  " hybrid\n");
240  BIO_printf(bio_err, " -param_enc arg specifies the way"
241  " the ec parameters are encoded\n");
242  BIO_printf(bio_err, " in the asn1 der "
243  "encoding\n");
244  BIO_printf(bio_err, " possible values:"
245  " named_curve (default)\n");
246  BIO_printf(bio_err," "
247  "explicit\n");
248  goto end;
249  }
250 
251  ERR_load_crypto_strings();
252 
253 #ifndef OPENSSL_NO_ENGINE
254  setup_engine(bio_err, engine, 0);
255 #endif
256 
257  if(!app_passwd(bio_err, passargin, passargout, &passin, &passout))
258  {
259  BIO_printf(bio_err, "Error getting passwords\n");
260  goto end;
261  }
262 
263  in = BIO_new(BIO_s_file());
264  out = BIO_new(BIO_s_file());
265  if ((in == NULL) || (out == NULL))
266  {
267  ERR_print_errors(bio_err);
268  goto end;
269  }
270 
271  if (infile == NULL)
272  BIO_set_fp(in, stdin, BIO_NOCLOSE);
273  else
274  {
275  if (BIO_read_filename(in, infile) <= 0)
276  {
277  perror(infile);
278  goto end;
279  }
280  }
281 
282  BIO_printf(bio_err, "read EC key\n");
283  if (informat == FORMAT_ASN1)
284  {
285  if (pubin)
286  eckey = d2i_EC_PUBKEY_bio(in, NULL);
287  else
288  eckey = d2i_ECPrivateKey_bio(in, NULL);
289  }
290  else if (informat == FORMAT_PEM)
291  {
292  if (pubin)
293  eckey = PEM_read_bio_EC_PUBKEY(in, NULL, NULL,
294  NULL);
295  else
296  eckey = PEM_read_bio_ECPrivateKey(in, NULL, NULL,
297  passin);
298  }
299  else
300  {
301  BIO_printf(bio_err, "bad input format specified for key\n");
302  goto end;
303  }
304  if (eckey == NULL)
305  {
306  BIO_printf(bio_err,"unable to load Key\n");
307  ERR_print_errors(bio_err);
308  goto end;
309  }
310 
311  if (outfile == NULL)
312  {
313  BIO_set_fp(out, stdout, BIO_NOCLOSE);
314 #ifdef OPENSSL_SYS_VMS
315  {
316  BIO *tmpbio = BIO_new(BIO_f_linebuffer());
317  out = BIO_push(tmpbio, out);
318  }
319 #endif
320  }
321  else
322  {
323  if (BIO_write_filename(out, outfile) <= 0)
324  {
325  perror(outfile);
326  goto end;
327  }
328  }
329 
330  group = EC_KEY_get0_group(eckey);
331 
332  if (new_form)
333  EC_KEY_set_conv_form(eckey, form);
334 
335  if (new_asn1_flag)
336  EC_KEY_set_asn1_flag(eckey, asn1_flag);
337 
338  if (text)
339  if (!EC_KEY_print(out, eckey, 0))
340  {
341  perror(outfile);
342  ERR_print_errors(bio_err);
343  goto end;
344  }
345 
346  if (noout)
347  {
348  ret = 0;
349  goto end;
350  }
351 
352  BIO_printf(bio_err, "writing EC key\n");
353  if (outformat == FORMAT_ASN1)
354  {
355  if (param_out)
356  i = i2d_ECPKParameters_bio(out, group);
357  else if (pubin || pubout)
358  i = i2d_EC_PUBKEY_bio(out, eckey);
359  else
360  i = i2d_ECPrivateKey_bio(out, eckey);
361  }
362  else if (outformat == FORMAT_PEM)
363  {
364  if (param_out)
365  i = PEM_write_bio_ECPKParameters(out, group);
366  else if (pubin || pubout)
367  i = PEM_write_bio_EC_PUBKEY(out, eckey);
368  else
369  i = PEM_write_bio_ECPrivateKey(out, eckey, enc,
370  NULL, 0, NULL, passout);
371  }
372  else
373  {
374  BIO_printf(bio_err, "bad output format specified for "
375  "outfile\n");
376  goto end;
377  }
378 
379  if (!i)
380  {
381  BIO_printf(bio_err, "unable to write private key\n");
382  ERR_print_errors(bio_err);
383  }
384  else
385  ret=0;
386 end:
387  if (in)
388  BIO_free(in);
389  if (out)
390  BIO_free_all(out);
391  if (eckey)
392  EC_KEY_free(eckey);
393  if (passin)
394  OPENSSL_free(passin);
395  if (passout)
396  OPENSSL_free(passout);
397  apps_shutdown();
398  OPENSSL_EXIT(ret);
399 }
400 #else /* !OPENSSL_NO_EC */
401 
402 # if PEDANTIC
403 static void *dummy=&dummy;
404 # endif
405 
406 #endif
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