Make gcc 2.95.2 happy again, even under ``-Wall -Wshadow -Wpointer-arith -Wcast-align
[openssl.git] / apps / rsa.c
1 /* apps/rsa.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 #ifndef NO_RSA
60 #include <stdio.h>
61 #include <stdlib.h>
62 #include <string.h>
63 #include <time.h>
64 #include "apps.h"
65 #include <openssl/bio.h>
66 #include <openssl/err.h>
67 #include <openssl/rsa.h>
68 #include <openssl/evp.h>
69 #include <openssl/x509.h>
70 #include <openssl/pem.h>
71
72 #undef PROG
73 #define PROG    rsa_main
74
75 /* -inform arg  - input format - default PEM (one of DER, NET or PEM)
76  * -outform arg - output format - default PEM
77  * -in arg      - input file - default stdin
78  * -out arg     - output file - default stdout
79  * -des         - encrypt output if PEM format with DES in cbc mode
80  * -des3        - encrypt output if PEM format
81  * -idea        - encrypt output if PEM format
82  * -text        - print a text version
83  * -modulus     - print the RSA key modulus
84  * -check       - verify key consistency
85  * -pubin       - Expect a public key in input file.
86  * -pubout      - Output a public key.
87  */
88
89 int MAIN(int, char **);
90
91 int MAIN(int argc, char **argv)
92         {
93         int ret=1;
94         RSA *rsa=NULL;
95         int i,badops=0;
96         const EVP_CIPHER *enc=NULL;
97         BIO *in=NULL,*out=NULL;
98         int informat,outformat,text=0,check=0,noout=0;
99         int pubin = 0, pubout = 0;
100         char *infile,*outfile,*prog;
101         char *passin = NULL, *passout = NULL;
102         int modulus=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         infile=NULL;
111         outfile=NULL;
112         informat=FORMAT_PEM;
113         outformat=FORMAT_PEM;
114
115         prog=argv[0];
116         argc--;
117         argv++;
118         while (argc >= 1)
119                 {
120                 if      (strcmp(*argv,"-inform") == 0)
121                         {
122                         if (--argc < 1) goto bad;
123                         informat=str2fmt(*(++argv));
124                         }
125                 else if (strcmp(*argv,"-outform") == 0)
126                         {
127                         if (--argc < 1) goto bad;
128                         outformat=str2fmt(*(++argv));
129                         }
130                 else if (strcmp(*argv,"-in") == 0)
131                         {
132                         if (--argc < 1) goto bad;
133                         infile= *(++argv);
134                         }
135                 else if (strcmp(*argv,"-out") == 0)
136                         {
137                         if (--argc < 1) goto bad;
138                         outfile= *(++argv);
139                         }
140                 else if (strcmp(*argv,"-passin") == 0)
141                         {
142                         if (--argc < 1) goto bad;
143                         passin= *(++argv);
144                         }
145                 else if (strcmp(*argv,"-envpassin") == 0)
146                         {
147                         if (--argc < 1) goto bad;
148                                 if(!(passin= getenv(*(++argv))))
149                                 {
150                                 BIO_printf(bio_err,
151                                  "Can't read environment variable %s\n",
152                                                                 *argv);
153                                 badops = 1;
154                                 }
155                         }
156                 else if (strcmp(*argv,"-envpassout") == 0)
157                         {
158                         if (--argc < 1) goto bad;
159                                 if(!(passout= getenv(*(++argv))))
160                                 {
161                                 BIO_printf(bio_err,
162                                  "Can't read environment variable %s\n",
163                                                                 *argv);
164                                 badops = 1;
165                                 }
166                         }
167                 else if (strcmp(*argv,"-passout") == 0)
168                         {
169                         if (--argc < 1) goto bad;
170                         passout= *(++argv);
171                         }
172                 else if (strcmp(*argv,"-pubin") == 0)
173                         pubin=1;
174                 else if (strcmp(*argv,"-pubout") == 0)
175                         pubout=1;
176                 else if (strcmp(*argv,"-noout") == 0)
177                         noout=1;
178                 else if (strcmp(*argv,"-text") == 0)
179                         text=1;
180                 else if (strcmp(*argv,"-modulus") == 0)
181                         modulus=1;
182                 else if (strcmp(*argv,"-check") == 0)
183                         check=1;
184                 else if ((enc=EVP_get_cipherbyname(&(argv[0][1]))) == NULL)
185                         {
186                         BIO_printf(bio_err,"unknown option %s\n",*argv);
187                         badops=1;
188                         break;
189                         }
190                 argc--;
191                 argv++;
192                 }
193
194         if (badops)
195                 {
196 bad:
197                 BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog);
198                 BIO_printf(bio_err,"where options are\n");
199                 BIO_printf(bio_err," -inform arg     input format - one of DER NET PEM\n");
200                 BIO_printf(bio_err," -outform arg    output format - one of DER NET PEM\n");
201                 BIO_printf(bio_err," -in arg         input file\n");
202                 BIO_printf(bio_err," -passin arg     input file pass phrase\n");
203                 BIO_printf(bio_err," -envpassin arg  environment variable containing input file pass phrase\n");
204                 BIO_printf(bio_err," -in arg         input file\n");
205                 BIO_printf(bio_err," -out arg        output file\n");
206                 BIO_printf(bio_err," -passout arg    output file pass phrase\n");
207                 BIO_printf(bio_err," -envpassout arg environment variable containing output file pass phrase\n");
208                 BIO_printf(bio_err," -des            encrypt PEM output with cbc des\n");
209                 BIO_printf(bio_err," -des3           encrypt PEM output with ede cbc des using 168 bit key\n");
210 #ifndef NO_IDEA
211                 BIO_printf(bio_err," -idea           encrypt PEM output with cbc idea\n");
212 #endif
213                 BIO_printf(bio_err," -text           print the key in text\n");
214                 BIO_printf(bio_err," -noout          don't print key out\n");
215                 BIO_printf(bio_err," -modulus        print the RSA key modulus\n");
216                 BIO_printf(bio_err," -check          verify key consistency\n");
217                 BIO_printf(bio_err," -pubin          expect a public key in input file\n");
218                 BIO_printf(bio_err," -pubout         output a public key\n");
219                 goto end;
220                 }
221
222         ERR_load_crypto_strings();
223
224         if(check && pubin) {
225                 BIO_printf(bio_err, "Only private keys can be checked\n");
226                 goto end;
227         }
228
229         in=BIO_new(BIO_s_file());
230         out=BIO_new(BIO_s_file());
231         if ((in == NULL) || (out == NULL))
232                 {
233                 ERR_print_errors(bio_err);
234                 goto end;
235                 }
236
237         if (infile == NULL)
238                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
239         else
240                 {
241                 if (BIO_read_filename(in,infile) <= 0)
242                         {
243                         perror(infile);
244                         goto end;
245                         }
246                 }
247
248         BIO_printf(bio_err,"read RSA key\n");
249         if      (informat == FORMAT_ASN1) {
250                 if (pubin) rsa=d2i_RSA_PUBKEY_bio(in,NULL);
251                 else rsa=d2i_RSAPrivateKey_bio(in,NULL);
252         }
253 #ifndef NO_RC4
254         else if (informat == FORMAT_NETSCAPE)
255                 {
256                 BUF_MEM *buf=NULL;
257                 unsigned char *p;
258                 int size=0;
259
260                 buf=BUF_MEM_new();
261                 for (;;)
262                         {
263                         if ((buf == NULL) || (!BUF_MEM_grow(buf,size+1024*10)))
264                                 goto end;
265                         i=BIO_read(in,&(buf->data[size]),1024*10);
266                         size+=i;
267                         if (i == 0) break;
268                         if (i < 0)
269                                 {
270                                 perror("reading private key");
271                                 BUF_MEM_free(buf);
272                                 goto end;
273                                 }
274                         }
275                 p=(unsigned char *)buf->data;
276                 rsa=d2i_Netscape_RSA(NULL,&p,(long)size,NULL);
277                 BUF_MEM_free(buf);
278                 }
279 #endif
280         else if (informat == FORMAT_PEM) {
281                 if(pubin) rsa=PEM_read_bio_RSA_PUBKEY(in,NULL,NULL,NULL);
282                 else rsa=PEM_read_bio_RSAPrivateKey(in,NULL, PEM_cb,passin);
283         }
284         else
285                 {
286                 BIO_printf(bio_err,"bad input format specified for key\n");
287                 goto end;
288                 }
289         if (rsa == NULL)
290                 {
291                 BIO_printf(bio_err,"unable to load key\n");
292                 ERR_print_errors(bio_err);
293                 goto end;
294                 }
295
296         if (outfile == NULL)
297                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
298         else
299                 {
300                 if (BIO_write_filename(out,outfile) <= 0)
301                         {
302                         perror(outfile);
303                         goto end;
304                         }
305                 }
306
307         if (text) 
308                 if (!RSA_print(out,rsa,0))
309                         {
310                         perror(outfile);
311                         ERR_print_errors(bio_err);
312                         goto end;
313                         }
314
315         if (modulus)
316                 {
317                 BIO_printf(out,"Modulus=");
318                 BN_print(out,rsa->n);
319                 BIO_printf(out,"\n");
320                 }
321
322         if (check)
323                 {
324                 int r = RSA_check_key(rsa);
325
326                 if (r == 1)
327                         BIO_printf(out,"RSA key ok\n");
328                 else if (r == 0)
329                         {
330                         long e;
331
332                         while ((e = ERR_peek_error()) != 0 &&
333                                 ERR_GET_LIB(e) == ERR_LIB_RSA &&
334                                 ERR_GET_FUNC(e) == RSA_F_RSA_CHECK_KEY &&
335                                 ERR_GET_REASON(e) != ERR_R_MALLOC_FAILURE)
336                                 {
337                                 BIO_printf(out, "RSA key error: %s\n", ERR_reason_error_string(e));
338                                 ERR_get_error(); /* remove e from error stack */
339                                 }
340                         }
341                 
342                 if (r == -1 || ERR_peek_error() != 0) /* should happen only if r == -1 */
343                         {
344                         ERR_print_errors(bio_err);
345                         goto end;
346                         }
347                 }
348                 
349         if (noout)
350                 {
351                 ret = 0;
352                 goto end;
353                 }
354         BIO_printf(bio_err,"writing RSA key\n");
355         if      (outformat == FORMAT_ASN1) {
356                 if(pubout || pubin) i=i2d_RSA_PUBKEY_bio(out,rsa);
357                 else i=i2d_RSAPrivateKey_bio(out,rsa);
358         }
359 #ifndef NO_RC4
360         else if (outformat == FORMAT_NETSCAPE)
361                 {
362                 unsigned char *p,*pp;
363                 int size;
364
365                 i=1;
366                 size=i2d_Netscape_RSA(rsa,NULL,NULL);
367                 if ((p=(unsigned char *)Malloc(size)) == NULL)
368                         {
369                         BIO_printf(bio_err,"Malloc failure\n");
370                         goto end;
371                         }
372                 pp=p;
373                 i2d_Netscape_RSA(rsa,&p,NULL);
374                 BIO_write(out,(char *)pp,size);
375                 Free(pp);
376                 }
377 #endif
378         else if (outformat == FORMAT_PEM) {
379                 if(pubout || pubin)
380                     i=PEM_write_bio_RSA_PUBKEY(out,rsa);
381                 else i=PEM_write_bio_RSAPrivateKey(out,rsa,
382                                                 enc,NULL,0,PEM_cb,passout);
383         } else  {
384                 BIO_printf(bio_err,"bad output format specified for outfile\n");
385                 goto end;
386                 }
387         if (!i)
388                 {
389                 BIO_printf(bio_err,"unable to write key\n");
390                 ERR_print_errors(bio_err);
391                 }
392         else
393                 ret=0;
394 end:
395         if (in != NULL) BIO_free(in);
396         if (out != NULL) BIO_free(out);
397         if (rsa != NULL) RSA_free(rsa);
398         EXIT(ret);
399         }
400 #else /* !NO_RSA */
401
402 # if PEDANTIC
403 static void *dummy=&dummy;
404 # endif
405
406 #endif