dsa.c revision 312826 
1/* apps/dsa.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <openssl/opensslconf.h> /* for OPENSSL_NO_DSA */
60#ifndef OPENSSL_NO_DSA
61# include <stdio.h>
62# include <stdlib.h>
63# include <string.h>
64# include <time.h>
65# include "apps.h"
66# include <openssl/bio.h>
67# include <openssl/err.h>
68# include <openssl/dsa.h>
69# include <openssl/evp.h>
70# include <openssl/x509.h>
71# include <openssl/pem.h>
72# include <openssl/bn.h>
73
74# undef PROG
75# define PROG    dsa_main
76
77/*-
78 * -inform arg  - input format - default PEM (one of DER, NET or PEM)
79 * -outform arg - output format - default PEM
80 * -in arg      - input file - default stdin
81 * -out arg     - output file - default stdout
82 * -des         - encrypt output if PEM format with DES in cbc mode
83 * -des3        - encrypt output if PEM format
84 * -idea        - encrypt output if PEM format
85 * -aes128      - encrypt output if PEM format
86 * -aes192      - encrypt output if PEM format
87 * -aes256      - encrypt output if PEM format
88 * -camellia128 - encrypt output if PEM format
89 * -camellia192 - encrypt output if PEM format
90 * -camellia256 - encrypt output if PEM format
91 * -seed        - encrypt output if PEM format
92 * -text        - print a text version
93 * -modulus     - print the DSA public key
94 */
95
96int MAIN(int, char **);
97
98int MAIN(int argc, char **argv)
99{
100    ENGINE *e = NULL;
101    int ret = 1;
102    DSA *dsa = NULL;
103    int i, badops = 0;
104    const EVP_CIPHER *enc = NULL;
105    BIO *in = NULL, *out = NULL;
106    int informat, outformat, text = 0, noout = 0;
107    int pubin = 0, pubout = 0;
108    char *infile, *outfile, *prog;
109    char *engine;
110    char *passargin = NULL, *passargout = NULL;
111    char *passin = NULL, *passout = NULL;
112    int modulus = 0;
113
114    int pvk_encr = 2;
115
116    apps_startup();
117
118    if (bio_err == NULL)
119        if ((bio_err = BIO_new(BIO_s_file())) != NULL)
120            BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
121
122    if (!load_config(bio_err, NULL))
123        goto end;
124
125    engine = NULL;
126    infile = NULL;
127    outfile = NULL;
128    informat = FORMAT_PEM;
129    outformat = FORMAT_PEM;
130
131    prog = argv[0];
132    argc--;
133    argv++;
134    while (argc >= 1) {
135        if (strcmp(*argv, "-inform") == 0) {
136            if (--argc < 1)
137                goto bad;
138            informat = str2fmt(*(++argv));
139        } else if (strcmp(*argv, "-outform") == 0) {
140            if (--argc < 1)
141                goto bad;
142            outformat = str2fmt(*(++argv));
143        } else if (strcmp(*argv, "-in") == 0) {
144            if (--argc < 1)
145                goto bad;
146            infile = *(++argv);
147        } else if (strcmp(*argv, "-out") == 0) {
148            if (--argc < 1)
149                goto bad;
150            outfile = *(++argv);
151        } else if (strcmp(*argv, "-passin") == 0) {
152            if (--argc < 1)
153                goto bad;
154            passargin = *(++argv);
155        } else if (strcmp(*argv, "-passout") == 0) {
156            if (--argc < 1)
157                goto bad;
158            passargout = *(++argv);
159        }
160# ifndef OPENSSL_NO_ENGINE
161        else if (strcmp(*argv, "-engine") == 0) {
162            if (--argc < 1)
163                goto bad;
164            engine = *(++argv);
165        }
166# endif
167        else if (strcmp(*argv, "-pvk-strong") == 0)
168            pvk_encr = 2;
169        else if (strcmp(*argv, "-pvk-weak") == 0)
170            pvk_encr = 1;
171        else if (strcmp(*argv, "-pvk-none") == 0)
172            pvk_encr = 0;
173        else if (strcmp(*argv, "-noout") == 0)
174            noout = 1;
175        else if (strcmp(*argv, "-text") == 0)
176            text = 1;
177        else if (strcmp(*argv, "-modulus") == 0)
178            modulus = 1;
179        else if (strcmp(*argv, "-pubin") == 0)
180            pubin = 1;
181        else if (strcmp(*argv, "-pubout") == 0)
182            pubout = 1;
183        else if ((enc = EVP_get_cipherbyname(&(argv[0][1]))) == NULL) {
184            BIO_printf(bio_err, "unknown option %s\n", *argv);
185            badops = 1;
186            break;
187        }
188        argc--;
189        argv++;
190    }
191
192    if (badops) {
193 bad:
194        BIO_printf(bio_err, "%s [options] <infile >outfile\n", prog);
195        BIO_printf(bio_err, "where options are\n");
196        BIO_printf(bio_err, " -inform arg     input format - DER or PEM\n");
197        BIO_printf(bio_err, " -outform arg    output format - DER or PEM\n");
198        BIO_printf(bio_err, " -in arg         input file\n");
199        BIO_printf(bio_err,
200                   " -passin arg     input file pass phrase source\n");
201        BIO_printf(bio_err, " -out arg        output file\n");
202        BIO_printf(bio_err,
203                   " -passout arg    output file pass phrase source\n");
204# ifndef OPENSSL_NO_ENGINE
205        BIO_printf(bio_err,
206                   " -engine e       use engine e, possibly a hardware device.\n");
207# endif
208        BIO_printf(bio_err,
209                   " -des            encrypt PEM output with cbc des\n");
210        BIO_printf(bio_err,
211                   " -des3           encrypt PEM output with ede cbc des using 168 bit key\n");
212# ifndef OPENSSL_NO_IDEA
213        BIO_printf(bio_err,
214                   " -idea           encrypt PEM output with cbc idea\n");
215# endif
216# ifndef OPENSSL_NO_AES
217        BIO_printf(bio_err, " -aes128, -aes192, -aes256\n");
218        BIO_printf(bio_err,
219                   "                 encrypt PEM output with cbc aes\n");
220# endif
221# ifndef OPENSSL_NO_CAMELLIA
222        BIO_printf(bio_err, " -camellia128, -camellia192, -camellia256\n");
223        BIO_printf(bio_err,
224                   "                 encrypt PEM output with cbc camellia\n");
225# endif
226# ifndef OPENSSL_NO_SEED
227        BIO_printf(bio_err,
228                   " -seed           encrypt PEM output with cbc seed\n");
229# endif
230        BIO_printf(bio_err, " -text           print the key in text\n");
231        BIO_printf(bio_err, " -noout          don't print key out\n");
232        BIO_printf(bio_err, " -modulus        print the DSA public value\n");
233        goto end;
234    }
235
236    ERR_load_crypto_strings();
237
238    e = setup_engine(bio_err, engine, 0);
239
240    if (!app_passwd(bio_err, passargin, passargout, &passin, &passout)) {
241        BIO_printf(bio_err, "Error getting passwords\n");
242        goto end;
243    }
244
245    in = BIO_new(BIO_s_file());
246    out = BIO_new(BIO_s_file());
247    if ((in == NULL) || (out == NULL)) {
248        ERR_print_errors(bio_err);
249        goto end;
250    }
251
252    if (infile == NULL)
253        BIO_set_fp(in, stdin, BIO_NOCLOSE);
254    else {
255        if (BIO_read_filename(in, infile) <= 0) {
256            perror(infile);
257            goto end;
258        }
259    }
260
261    BIO_printf(bio_err, "read DSA key\n");
262
263    {
264        EVP_PKEY *pkey;
265
266        if (pubin)
267            pkey = load_pubkey(bio_err, infile, informat, 1,
268                               passin, e, "Public Key");
269        else
270            pkey = load_key(bio_err, infile, informat, 1,
271                            passin, e, "Private Key");
272
273        if (pkey) {
274            dsa = EVP_PKEY_get1_DSA(pkey);
275            EVP_PKEY_free(pkey);
276        }
277    }
278    if (dsa == NULL) {
279        BIO_printf(bio_err, "unable to load Key\n");
280        ERR_print_errors(bio_err);
281        goto end;
282    }
283
284    if (outfile == NULL) {
285        BIO_set_fp(out, stdout, BIO_NOCLOSE);
286# ifdef OPENSSL_SYS_VMS
287        {
288            BIO *tmpbio = BIO_new(BIO_f_linebuffer());
289            out = BIO_push(tmpbio, out);
290        }
291# endif
292    } else {
293        if (BIO_write_filename(out, outfile) <= 0) {
294            perror(outfile);
295            goto end;
296        }
297    }
298
299    if (text)
300        if (!DSA_print(out, dsa, 0)) {
301            perror(outfile);
302            ERR_print_errors(bio_err);
303            goto end;
304        }
305
306    if (modulus) {
307        fprintf(stdout, "Public Key=");
308        BN_print(out, dsa->pub_key);
309        fprintf(stdout, "\n");
310    }
311
312    if (noout)
313        goto end;
314    BIO_printf(bio_err, "writing DSA key\n");
315    if (outformat == FORMAT_ASN1) {
316        if (pubin || pubout)
317            i = i2d_DSA_PUBKEY_bio(out, dsa);
318        else
319            i = i2d_DSAPrivateKey_bio(out, dsa);
320    } else if (outformat == FORMAT_PEM) {
321        if (pubin || pubout)
322            i = PEM_write_bio_DSA_PUBKEY(out, dsa);
323        else
324            i = PEM_write_bio_DSAPrivateKey(out, dsa, enc,
325                                            NULL, 0, NULL, passout);
326# if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_RC4)
327    } else if (outformat == FORMAT_MSBLOB || outformat == FORMAT_PVK) {
328        EVP_PKEY *pk;
329        pk = EVP_PKEY_new();
330        EVP_PKEY_set1_DSA(pk, dsa);
331        if (outformat == FORMAT_PVK)
332            i = i2b_PVK_bio(out, pk, pvk_encr, 0, passout);
333        else if (pubin || pubout)
334            i = i2b_PublicKey_bio(out, pk);
335        else
336            i = i2b_PrivateKey_bio(out, pk);
337        EVP_PKEY_free(pk);
338# endif
339    } else {
340        BIO_printf(bio_err, "bad output format specified for outfile\n");
341        goto end;
342    }
343    if (i <= 0) {
344        BIO_printf(bio_err, "unable to write private key\n");
345        ERR_print_errors(bio_err);
346    } else
347        ret = 0;
348 end:
349    if (in != NULL)
350        BIO_free(in);
351    if (out != NULL)
352        BIO_free_all(out);
353    if (dsa != NULL)
354        DSA_free(dsa);
355    release_engine(e);
356    if (passin)
357        OPENSSL_free(passin);
358    if (passout)
359        OPENSSL_free(passout);
360    apps_shutdown();
361    OPENSSL_EXIT(ret);
362}
363#else                           /* !OPENSSL_NO_DSA */
364
365# if PEDANTIC
366static void *dummy = &dummy;
367# endif
368
369#endif
370