1/* apps/genpkey.c */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2006
4 */
5/* ====================================================================
6 * Copyright (c) 2006 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 *    licensing@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#include <stdio.h>
59#include <string.h>
60#include "apps.h"
61#include <openssl/pem.h>
62#include <openssl/err.h>
63#include <openssl/evp.h>
64#ifndef OPENSSL_NO_ENGINE
65#include <openssl/engine.h>
66#endif
67
68static int init_keygen_file(BIO *err, EVP_PKEY_CTX **pctx,
69				const char *file, ENGINE *e);
70static int genpkey_cb(EVP_PKEY_CTX *ctx);
71
72#define PROG genpkey_main
73
74int MAIN(int, char **);
75
76int MAIN(int argc, char **argv)
77	{
78	ENGINE *e = NULL;
79	char **args, *outfile = NULL;
80	char *passarg = NULL;
81	BIO *in = NULL, *out = NULL;
82	const EVP_CIPHER *cipher = NULL;
83	int outformat;
84	int text = 0;
85	EVP_PKEY *pkey=NULL;
86	EVP_PKEY_CTX *ctx = NULL;
87	char *pass = NULL;
88	int badarg = 0;
89	int ret = 1, rv;
90
91	int do_param = 0;
92
93	if (bio_err == NULL)
94		bio_err = BIO_new_fp (stderr, BIO_NOCLOSE);
95
96	if (!load_config(bio_err, NULL))
97		goto end;
98
99	outformat=FORMAT_PEM;
100
101	ERR_load_crypto_strings();
102	OpenSSL_add_all_algorithms();
103	args = argv + 1;
104	while (!badarg && *args && *args[0] == '-')
105		{
106		if (!strcmp(*args,"-outform"))
107			{
108			if (args[1])
109				{
110				args++;
111				outformat=str2fmt(*args);
112				}
113			else badarg = 1;
114			}
115		else if (!strcmp(*args,"-pass"))
116			{
117			if (!args[1]) goto bad;
118			passarg= *(++args);
119			}
120#ifndef OPENSSL_NO_ENGINE
121		else if (strcmp(*args,"-engine") == 0)
122			{
123			if (!args[1])
124				goto bad;
125        		e = setup_engine(bio_err, *(++args), 0);
126			}
127#endif
128		else if (!strcmp (*args, "-paramfile"))
129			{
130			if (!args[1])
131				goto bad;
132			args++;
133			if (do_param == 1)
134				goto bad;
135			if (!init_keygen_file(bio_err, &ctx, *args, e))
136				goto end;
137			}
138		else if (!strcmp (*args, "-out"))
139			{
140			if (args[1])
141				{
142				args++;
143				outfile = *args;
144				}
145			else badarg = 1;
146			}
147		else if (strcmp(*args,"-algorithm") == 0)
148			{
149			if (!args[1])
150				goto bad;
151			if (!init_gen_str(bio_err, &ctx, *(++args),e, do_param))
152				goto end;
153			}
154		else if (strcmp(*args,"-pkeyopt") == 0)
155			{
156			if (!args[1])
157				goto bad;
158			if (!ctx)
159				{
160				BIO_puts(bio_err, "No keytype specified\n");
161				goto bad;
162				}
163			else if (pkey_ctrl_string(ctx, *(++args)) <= 0)
164				{
165				BIO_puts(bio_err, "parameter setting error\n");
166				ERR_print_errors(bio_err);
167				goto end;
168				}
169			}
170		else if (strcmp(*args,"-genparam") == 0)
171			{
172			if (ctx)
173				goto bad;
174			do_param = 1;
175			}
176		else if (strcmp(*args,"-text") == 0)
177			text=1;
178		else
179			{
180			cipher = EVP_get_cipherbyname(*args + 1);
181			if (!cipher)
182				{
183				BIO_printf(bio_err, "Unknown cipher %s\n",
184								*args + 1);
185				badarg = 1;
186				}
187			if (do_param == 1)
188				badarg = 1;
189			}
190		args++;
191		}
192
193	if (!ctx)
194		badarg = 1;
195
196	if (badarg)
197		{
198		bad:
199		BIO_printf(bio_err, "Usage: genpkey [options]\n");
200		BIO_printf(bio_err, "where options may be\n");
201		BIO_printf(bio_err, "-out file          output file\n");
202		BIO_printf(bio_err, "-outform X         output format (DER or PEM)\n");
203		BIO_printf(bio_err, "-pass arg          output file pass phrase source\n");
204		BIO_printf(bio_err, "-<cipher>          use cipher <cipher> to encrypt the key\n");
205#ifndef OPENSSL_NO_ENGINE
206		BIO_printf(bio_err, "-engine e          use engine e, possibly a hardware device.\n");
207#endif
208		BIO_printf(bio_err, "-paramfile file    parameters file\n");
209		BIO_printf(bio_err, "-algorithm alg     the public key algorithm\n");
210		BIO_printf(bio_err, "-pkeyopt opt:value set the public key algorithm option <opt>\n"
211				            "                   to value <value>\n");
212		BIO_printf(bio_err, "-genparam          generate parameters, not key\n");
213		BIO_printf(bio_err, "-text              print the in text\n");
214		BIO_printf(bio_err, "NB: options order may be important!  See the manual page.\n");
215		goto end;
216		}
217
218	if (!app_passwd(bio_err, passarg, NULL, &pass, NULL))
219		{
220		BIO_puts(bio_err, "Error getting password\n");
221		goto end;
222		}
223
224	if (outfile)
225		{
226		if (!(out = BIO_new_file (outfile, "wb")))
227			{
228			BIO_printf(bio_err,
229				 "Can't open output file %s\n", outfile);
230			goto end;
231			}
232		}
233	else
234		{
235		out = BIO_new_fp (stdout, BIO_NOCLOSE);
236#ifdef OPENSSL_SYS_VMS
237			{
238			BIO *tmpbio = BIO_new(BIO_f_linebuffer());
239			out = BIO_push(tmpbio, out);
240			}
241#endif
242		}
243
244	EVP_PKEY_CTX_set_cb(ctx, genpkey_cb);
245	EVP_PKEY_CTX_set_app_data(ctx, bio_err);
246
247	if (do_param)
248		{
249		if (EVP_PKEY_paramgen(ctx, &pkey) <= 0)
250			{
251			BIO_puts(bio_err, "Error generating parameters\n");
252			ERR_print_errors(bio_err);
253			goto end;
254			}
255		}
256	else
257		{
258		if (EVP_PKEY_keygen(ctx, &pkey) <= 0)
259			{
260			BIO_puts(bio_err, "Error generating key\n");
261			ERR_print_errors(bio_err);
262			goto end;
263			}
264		}
265
266	if (do_param)
267		rv = PEM_write_bio_Parameters(out, pkey);
268	else if (outformat == FORMAT_PEM)
269		rv = PEM_write_bio_PrivateKey(out, pkey, cipher, NULL, 0,
270								NULL, pass);
271	else if (outformat == FORMAT_ASN1)
272		rv = i2d_PrivateKey_bio(out, pkey);
273	else
274		{
275		BIO_printf(bio_err, "Bad format specified for key\n");
276		goto end;
277		}
278
279	if (rv <= 0)
280		{
281		BIO_puts(bio_err, "Error writing key\n");
282		ERR_print_errors(bio_err);
283		}
284
285	if (text)
286		{
287		if (do_param)
288			rv = EVP_PKEY_print_params(out, pkey, 0, NULL);
289		else
290			rv = EVP_PKEY_print_private(out, pkey, 0, NULL);
291
292		if (rv <= 0)
293			{
294			BIO_puts(bio_err, "Error printing key\n");
295			ERR_print_errors(bio_err);
296			}
297		}
298
299	ret = 0;
300
301	end:
302	if (pkey)
303		EVP_PKEY_free(pkey);
304	if (ctx)
305		EVP_PKEY_CTX_free(ctx);
306	if (out)
307		BIO_free_all(out);
308	BIO_free(in);
309	if (pass)
310		OPENSSL_free(pass);
311
312	return ret;
313	}
314
315static int init_keygen_file(BIO *err, EVP_PKEY_CTX **pctx,
316				const char *file, ENGINE *e)
317	{
318	BIO *pbio;
319	EVP_PKEY *pkey = NULL;
320	EVP_PKEY_CTX *ctx = NULL;
321	if (*pctx)
322		{
323		BIO_puts(err, "Parameters already set!\n");
324		return 0;
325		}
326
327	pbio = BIO_new_file(file, "r");
328	if (!pbio)
329		{
330		BIO_printf(err, "Can't open parameter file %s\n", file);
331		return 0;
332		}
333
334	pkey = PEM_read_bio_Parameters(pbio, NULL);
335	BIO_free(pbio);
336
337	if (!pkey)
338		{
339		BIO_printf(bio_err, "Error reading parameter file %s\n", file);
340		return 0;
341		}
342
343	ctx = EVP_PKEY_CTX_new(pkey, e);
344	if (!ctx)
345		goto err;
346	if (EVP_PKEY_keygen_init(ctx) <= 0)
347		goto err;
348	EVP_PKEY_free(pkey);
349	*pctx = ctx;
350	return 1;
351
352	err:
353	BIO_puts(err, "Error initializing context\n");
354	ERR_print_errors(err);
355	if (ctx)
356		EVP_PKEY_CTX_free(ctx);
357	if (pkey)
358		EVP_PKEY_free(pkey);
359	return 0;
360
361	}
362
363int init_gen_str(BIO *err, EVP_PKEY_CTX **pctx,
364			const char *algname, ENGINE *e, int do_param)
365	{
366	EVP_PKEY_CTX *ctx = NULL;
367	const EVP_PKEY_ASN1_METHOD *ameth;
368	ENGINE *tmpeng = NULL;
369	int pkey_id;
370
371	if (*pctx)
372		{
373		BIO_puts(err, "Algorithm already set!\n");
374		return 0;
375		}
376
377	ameth = EVP_PKEY_asn1_find_str(&tmpeng, algname, -1);
378
379#ifndef OPENSSL_NO_ENGINE
380	if (!ameth && e)
381		ameth = ENGINE_get_pkey_asn1_meth_str(e, algname, -1);
382#endif
383
384	if (!ameth)
385		{
386		BIO_printf(bio_err, "Algorithm %s not found\n", algname);
387		return 0;
388		}
389
390	ERR_clear_error();
391
392	EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, ameth);
393#ifndef OPENSSL_NO_ENGINE
394	if (tmpeng)
395		ENGINE_finish(tmpeng);
396#endif
397	ctx = EVP_PKEY_CTX_new_id(pkey_id, e);
398
399	if (!ctx)
400		goto err;
401	if (do_param)
402		{
403		if (EVP_PKEY_paramgen_init(ctx) <= 0)
404			goto err;
405		}
406	else
407		{
408		if (EVP_PKEY_keygen_init(ctx) <= 0)
409			goto err;
410		}
411
412	*pctx = ctx;
413	return 1;
414
415	err:
416	BIO_printf(err, "Error initializing %s context\n", algname);
417	ERR_print_errors(err);
418	if (ctx)
419		EVP_PKEY_CTX_free(ctx);
420	return 0;
421
422	}
423
424static int genpkey_cb(EVP_PKEY_CTX *ctx)
425	{
426	char c='*';
427	BIO *b = EVP_PKEY_CTX_get_app_data(ctx);
428	int p;
429	p = EVP_PKEY_CTX_get_keygen_info(ctx, 0);
430	if (p == 0) c='.';
431	if (p == 1) c='+';
432	if (p == 2) c='*';
433	if (p == 3) c='\n';
434	BIO_write(b,&c,1);
435	(void)BIO_flush(b);
436#ifdef LINT
437	p=n;
438#endif
439	return 1;
440	}
441