Modify S/MIME application so the -signer option writes the signer(s)
[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 argc, char **argv)
90         {
91         int ret=1;
92         RSA *rsa=NULL;
93         int i,badops=0;
94         const EVP_CIPHER *enc=NULL;
95         BIO *in=NULL,*out=NULL;
96         int informat,outformat,text=0,check=0,noout=0;
97         int pubin = 0, pubout = 0;
98         char *infile,*outfile,*prog;
99         char *passin = NULL, *passout = NULL;
100         int modulus=0;
101
102         apps_startup();
103
104         if (bio_err == NULL)
105                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
106                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
107
108         infile=NULL;
109         outfile=NULL;
110         informat=FORMAT_PEM;
111         outformat=FORMAT_PEM;
112
113         prog=argv[0];
114         argc--;
115         argv++;
116         while (argc >= 1)
117                 {
118                 if      (strcmp(*argv,"-inform") == 0)
119                         {
120                         if (--argc < 1) goto bad;
121                         informat=str2fmt(*(++argv));
122                         }
123                 else if (strcmp(*argv,"-outform") == 0)
124                         {
125                         if (--argc < 1) goto bad;
126                         outformat=str2fmt(*(++argv));
127                         }
128                 else if (strcmp(*argv,"-in") == 0)
129                         {
130                         if (--argc < 1) goto bad;
131                         infile= *(++argv);
132                         }
133                 else if (strcmp(*argv,"-out") == 0)
134                         {
135                         if (--argc < 1) goto bad;
136                         outfile= *(++argv);
137                         }
138                 else if (strcmp(*argv,"-passin") == 0)
139                         {
140                         if (--argc < 1) goto bad;
141                         passin= *(++argv);
142                         }
143                 else if (strcmp(*argv,"-envpassin") == 0)
144                         {
145                         if (--argc < 1) goto bad;
146                                 if(!(passin= getenv(*(++argv))))
147                                 {
148                                 BIO_printf(bio_err,
149                                  "Can't read environment variable %s\n",
150                                                                 *argv);
151                                 badops = 1;
152                                 }
153                         }
154                 else if (strcmp(*argv,"-envpassout") == 0)
155                         {
156                         if (--argc < 1) goto bad;
157                                 if(!(passout= getenv(*(++argv))))
158                                 {
159                                 BIO_printf(bio_err,
160                                  "Can't read environment variable %s\n",
161                                                                 *argv);
162                                 badops = 1;
163                                 }
164                         argv++;
165                         }
166                 else if (strcmp(*argv,"-passout") == 0)
167                         {
168                         if (--argc < 1) goto bad;
169                         passout= *(++argv);
170                         }
171                 else if (strcmp(*argv,"-pubin") == 0)
172                         pubin=1;
173                 else if (strcmp(*argv,"-pubout") == 0)
174                         pubout=1;
175                 else if (strcmp(*argv,"-noout") == 0)
176                         noout=1;
177                 else if (strcmp(*argv,"-text") == 0)
178                         text=1;
179                 else if (strcmp(*argv,"-modulus") == 0)
180                         modulus=1;
181                 else if (strcmp(*argv,"-check") == 0)
182                         check=1;
183                 else if ((enc=EVP_get_cipherbyname(&(argv[0][1]))) == NULL)
184                         {
185                         BIO_printf(bio_err,"unknown option %s\n",*argv);
186                         badops=1;
187                         break;
188                         }
189                 argc--;
190                 argv++;
191                 }
192
193         if (badops)
194                 {
195 bad:
196                 BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog);
197                 BIO_printf(bio_err,"where options are\n");
198                 BIO_printf(bio_err," -inform arg     input format - one of DER NET PEM\n");
199                 BIO_printf(bio_err," -outform arg    output format - one of DER NET PEM\n");
200                 BIO_printf(bio_err," -in arg         input file\n");
201                 BIO_printf(bio_err," -passin arg     input file pass phrase\n");
202                 BIO_printf(bio_err," -envpassin arg  environment variable containing input file pass phrase\n");
203                 BIO_printf(bio_err," -in arg         input file\n");
204                 BIO_printf(bio_err," -out arg        output file\n");
205                 BIO_printf(bio_err," -passout arg    input file pass phrase\n");
206                 BIO_printf(bio_err," -envpassout arg environment variable containing input file pass phrase\n");
207                 BIO_printf(bio_err," -des            encrypt PEM output with cbc des\n");
208                 BIO_printf(bio_err," -des3           encrypt PEM output with ede cbc des using 168 bit key\n");
209 #ifndef NO_IDEA
210                 BIO_printf(bio_err," -idea           encrypt PEM output with cbc idea\n");
211 #endif
212                 BIO_printf(bio_err," -text           print the key in text\n");
213                 BIO_printf(bio_err," -noout          don't print key out\n");
214                 BIO_printf(bio_err," -modulus        print the RSA key modulus\n");
215                 BIO_printf(bio_err," -check          verify key consistency\n");
216                 BIO_printf(bio_err," -pubin          expect a public key in input file\n");
217                 BIO_printf(bio_err," -pubout         output a public key\n");
218                 goto end;
219                 }
220
221         ERR_load_crypto_strings();
222
223         if(check && pubin) {
224                 BIO_printf(bio_err, "Only private keys can be checked\n");
225                 goto end;
226         }
227
228         in=BIO_new(BIO_s_file());
229         out=BIO_new(BIO_s_file());
230         if ((in == NULL) || (out == NULL))
231                 {
232                 ERR_print_errors(bio_err);
233                 goto end;
234                 }
235
236         if (infile == NULL)
237                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
238         else
239                 {
240                 if (BIO_read_filename(in,infile) <= 0)
241                         {
242                         perror(infile);
243                         goto end;
244                         }
245                 }
246
247         BIO_printf(bio_err,"read RSA key\n");
248         if      (informat == FORMAT_ASN1) {
249                 if (pubin) rsa=d2i_RSA_PUBKEY_bio(in,NULL);
250                 else rsa=d2i_RSAPrivateKey_bio(in,NULL);
251         }
252 #ifndef NO_RC4
253         else if (informat == FORMAT_NETSCAPE)
254                 {
255                 BUF_MEM *buf=NULL;
256                 unsigned char *p;
257                 int size=0;
258
259                 buf=BUF_MEM_new();
260                 for (;;)
261                         {
262                         if ((buf == NULL) || (!BUF_MEM_grow(buf,size+1024*10)))
263                                 goto end;
264                         i=BIO_read(in,&(buf->data[size]),1024*10);
265                         size+=i;
266                         if (i == 0) break;
267                         if (i < 0)
268                                 {
269                                 perror("reading private key");
270                                 BUF_MEM_free(buf);
271                                 goto end;
272                                 }
273                         }
274                 p=(unsigned char *)buf->data;
275                 rsa=(RSA *)d2i_Netscape_RSA(NULL,&p,(long)size,NULL);
276                 BUF_MEM_free(buf);
277                 }
278 #endif
279         else if (informat == FORMAT_PEM) {
280                 if(pubin) rsa=PEM_read_bio_RSA_PUBKEY(in,NULL,NULL,NULL);
281                 else {
282                         if(passin) rsa=PEM_read_bio_RSAPrivateKey(in,NULL,
283                                                                 key_cb,passin);
284                         else rsa=PEM_read_bio_RSAPrivateKey(in,NULL,NULL,NULL);
285                 }
286         }
287         else
288                 {
289                 BIO_printf(bio_err,"bad input format specified for key\n");
290                 goto end;
291                 }
292         if (rsa == NULL)
293                 {
294                 BIO_printf(bio_err,"unable to load key\n");
295                 ERR_print_errors(bio_err);
296                 goto end;
297                 }
298
299         if (outfile == NULL)
300                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
301         else
302                 {
303                 if (BIO_write_filename(out,outfile) <= 0)
304                         {
305                         perror(outfile);
306                         goto end;
307                         }
308                 }
309
310         if (text) 
311                 if (!RSA_print(out,rsa,0))
312                         {
313                         perror(outfile);
314                         ERR_print_errors(bio_err);
315                         goto end;
316                         }
317
318         if (modulus)
319                 {
320                 BIO_printf(out,"Modulus=");
321                 BN_print(out,rsa->n);
322                 BIO_printf(out,"\n");
323                 }
324
325         if (check)
326                 {
327                 int r = RSA_check_key(rsa);
328
329                 if (r == 1)
330                         BIO_printf(out,"RSA key ok\n");
331                 else if (r == 0)
332                         {
333                         long e;
334
335                         while ((e = ERR_peek_error()) != 0 &&
336                                 ERR_GET_LIB(e) == ERR_LIB_RSA &&
337                                 ERR_GET_FUNC(e) == RSA_F_RSA_CHECK_KEY &&
338                                 ERR_GET_REASON(e) != ERR_R_MALLOC_FAILURE)
339                                 {
340                                 BIO_printf(out, "RSA key error: %s\n", ERR_reason_error_string(e));
341                                 ERR_get_error(); /* remove e from error stack */
342                                 }
343                         }
344                 
345                 if (r == -1 || ERR_peek_error() != 0) /* should happen only if r == -1 */
346                         {
347                         ERR_print_errors(bio_err);
348                         goto end;
349                         }
350                 }
351                 
352         if (noout)
353                 {
354                 ret = 0;
355                 goto end;
356                 }
357         BIO_printf(bio_err,"writing RSA key\n");
358         if      (outformat == FORMAT_ASN1) {
359                 if(pubout || pubin) i=i2d_RSA_PUBKEY_bio(out,rsa);
360                 else i=i2d_RSAPrivateKey_bio(out,rsa);
361         }
362 #ifndef NO_RC4
363         else if (outformat == FORMAT_NETSCAPE)
364                 {
365                 unsigned char *p,*pp;
366                 int size;
367
368                 i=1;
369                 size=i2d_Netscape_RSA(rsa,NULL,NULL);
370                 if ((p=(unsigned char *)Malloc(size)) == NULL)
371                         {
372                         BIO_printf(bio_err,"Malloc failure\n");
373                         goto end;
374                         }
375                 pp=p;
376                 i2d_Netscape_RSA(rsa,&p,NULL);
377                 BIO_write(out,(char *)pp,size);
378                 Free(pp);
379                 }
380 #endif
381         else if (outformat == FORMAT_PEM) {
382                 if(pubout || pubin)
383                     i=PEM_write_bio_RSA_PUBKEY(out,rsa);
384                 else {
385                         if(passout) i=PEM_write_bio_RSAPrivateKey(out,rsa,
386                                                 enc,NULL,0,key_cb,passout);
387                         else i=PEM_write_bio_RSAPrivateKey(out,rsa,enc,NULL,
388                                                                 0,NULL,NULL);
389                 }
390         } else  {
391                 BIO_printf(bio_err,"bad output format specified for outfile\n");
392                 goto end;
393                 }
394         if (!i)
395                 {
396                 BIO_printf(bio_err,"unable to write key\n");
397                 ERR_print_errors(bio_err);
398                 }
399         else
400                 ret=0;
401 end:
402         if (in != NULL) BIO_free(in);
403         if (out != NULL) BIO_free(out);
404         if (rsa != NULL) RSA_free(rsa);
405         EXIT(ret);
406         }
407 #endif