1*440d1414Stb /* $OpenBSD: genpkey.c,v 1.17 2023/07/23 11:39:29 tb Exp $ */
2dab3f910Sjsing /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3dab3f910Sjsing * project 2006
4dab3f910Sjsing */
5dab3f910Sjsing /* ====================================================================
6dab3f910Sjsing * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
7dab3f910Sjsing *
8dab3f910Sjsing * Redistribution and use in source and binary forms, with or without
9dab3f910Sjsing * modification, are permitted provided that the following conditions
10dab3f910Sjsing * are met:
11dab3f910Sjsing *
12dab3f910Sjsing * 1. Redistributions of source code must retain the above copyright
13dab3f910Sjsing * notice, this list of conditions and the following disclaimer.
14dab3f910Sjsing *
15dab3f910Sjsing * 2. Redistributions in binary form must reproduce the above copyright
16dab3f910Sjsing * notice, this list of conditions and the following disclaimer in
17dab3f910Sjsing * the documentation and/or other materials provided with the
18dab3f910Sjsing * distribution.
19dab3f910Sjsing *
20dab3f910Sjsing * 3. All advertising materials mentioning features or use of this
21dab3f910Sjsing * software must display the following acknowledgment:
22dab3f910Sjsing * "This product includes software developed by the OpenSSL Project
23dab3f910Sjsing * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24dab3f910Sjsing *
25dab3f910Sjsing * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26dab3f910Sjsing * endorse or promote products derived from this software without
27dab3f910Sjsing * prior written permission. For written permission, please contact
28dab3f910Sjsing * licensing@OpenSSL.org.
29dab3f910Sjsing *
30dab3f910Sjsing * 5. Products derived from this software may not be called "OpenSSL"
31dab3f910Sjsing * nor may "OpenSSL" appear in their names without prior written
32dab3f910Sjsing * permission of the OpenSSL Project.
33dab3f910Sjsing *
34dab3f910Sjsing * 6. Redistributions of any form whatsoever must retain the following
35dab3f910Sjsing * acknowledgment:
36dab3f910Sjsing * "This product includes software developed by the OpenSSL Project
37dab3f910Sjsing * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38dab3f910Sjsing *
39dab3f910Sjsing * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40dab3f910Sjsing * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41dab3f910Sjsing * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42dab3f910Sjsing * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43dab3f910Sjsing * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44dab3f910Sjsing * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45dab3f910Sjsing * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46dab3f910Sjsing * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47dab3f910Sjsing * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48dab3f910Sjsing * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49dab3f910Sjsing * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50dab3f910Sjsing * OF THE POSSIBILITY OF SUCH DAMAGE.
51dab3f910Sjsing * ====================================================================
52dab3f910Sjsing *
53dab3f910Sjsing * This product includes cryptographic software written by Eric Young
54dab3f910Sjsing * (eay@cryptsoft.com). This product includes software written by Tim
55dab3f910Sjsing * Hudson (tjh@cryptsoft.com).
56dab3f910Sjsing *
57dab3f910Sjsing */
58dab3f910Sjsing
59dab3f910Sjsing #include <stdio.h>
60dab3f910Sjsing #include <string.h>
61dab3f910Sjsing
62dab3f910Sjsing #include "apps.h"
63dab3f910Sjsing
64dab3f910Sjsing #include <openssl/err.h>
65dab3f910Sjsing #include <openssl/evp.h>
66dab3f910Sjsing #include <openssl/pem.h>
67dab3f910Sjsing
68b5fffbbbSjsing static int init_keygen_file(BIO * err, EVP_PKEY_CTX **pctx, const char *file);
69dab3f910Sjsing static int genpkey_cb(EVP_PKEY_CTX * ctx);
70dab3f910Sjsing
71efc7e65fStb static struct {
72b5fffbbbSjsing const EVP_CIPHER *cipher;
73b5fffbbbSjsing EVP_PKEY_CTX **ctx;
74b5fffbbbSjsing int do_param;
75b5fffbbbSjsing char *outfile;
76b5fffbbbSjsing int outformat;
77b5fffbbbSjsing char *passarg;
78b5fffbbbSjsing int text;
79e7718adaStb } cfg;
80b5fffbbbSjsing
81b5fffbbbSjsing static int
genpkey_opt_algorithm(char * arg)82b5fffbbbSjsing genpkey_opt_algorithm(char *arg)
83b5fffbbbSjsing {
84e7718adaStb if (!init_gen_str(bio_err, cfg.ctx, arg,
85e7718adaStb cfg.do_param))
86b5fffbbbSjsing return (1);
87b5fffbbbSjsing
88b5fffbbbSjsing return (0);
89b5fffbbbSjsing }
90b5fffbbbSjsing
91b5fffbbbSjsing static int
genpkey_opt_cipher(int argc,char ** argv,int * argsused)92b5fffbbbSjsing genpkey_opt_cipher(int argc, char **argv, int *argsused)
93b5fffbbbSjsing {
94b5fffbbbSjsing char *name = argv[0];
95b5fffbbbSjsing
96b5fffbbbSjsing if (*name++ != '-')
97b5fffbbbSjsing return (1);
98b5fffbbbSjsing
99e7718adaStb if (cfg.do_param == 1)
100b5fffbbbSjsing return (1);
101b5fffbbbSjsing
102b5fffbbbSjsing if (strcmp(name, "none") == 0) {
103e7718adaStb cfg.cipher = NULL;
104b5fffbbbSjsing *argsused = 1;
105b5fffbbbSjsing return (0);
106b5fffbbbSjsing }
107b5fffbbbSjsing
108e7718adaStb if ((cfg.cipher = EVP_get_cipherbyname(name)) != NULL) {
109b5fffbbbSjsing *argsused = 1;
110b5fffbbbSjsing return (0);
111b5fffbbbSjsing }
112b5fffbbbSjsing
113b5fffbbbSjsing return (1);
114b5fffbbbSjsing }
115b5fffbbbSjsing
116b5fffbbbSjsing static int
genpkey_opt_paramfile(char * arg)117b5fffbbbSjsing genpkey_opt_paramfile(char *arg)
118b5fffbbbSjsing {
119e7718adaStb if (cfg.do_param == 1)
120b5fffbbbSjsing return (1);
121e7718adaStb if (!init_keygen_file(bio_err, cfg.ctx, arg))
122b5fffbbbSjsing return (1);
123b5fffbbbSjsing
124b5fffbbbSjsing return (0);
125b5fffbbbSjsing }
126b5fffbbbSjsing
127b5fffbbbSjsing static int
genpkey_opt_pkeyopt(char * arg)128b5fffbbbSjsing genpkey_opt_pkeyopt(char *arg)
129b5fffbbbSjsing {
130e7718adaStb if (*cfg.ctx == NULL) {
131b5fffbbbSjsing BIO_puts(bio_err, "No keytype specified\n");
132b5fffbbbSjsing return (1);
133b5fffbbbSjsing }
134b5fffbbbSjsing
135e7718adaStb if (pkey_ctrl_string(*cfg.ctx, arg) <= 0) {
136b5fffbbbSjsing BIO_puts(bio_err, "parameter setting error\n");
137b5fffbbbSjsing ERR_print_errors(bio_err);
138b5fffbbbSjsing return (1);
139b5fffbbbSjsing }
140b5fffbbbSjsing
141b5fffbbbSjsing return (0);
142b5fffbbbSjsing }
143b5fffbbbSjsing
144ea149709Sguenther static const struct option genpkey_options[] = {
145b5fffbbbSjsing {
146b5fffbbbSjsing .name = "algorithm",
147b5fffbbbSjsing .argname = "name",
148b5fffbbbSjsing .desc = "Public key algorithm to use (must precede -pkeyopt)",
149b5fffbbbSjsing .type = OPTION_ARG_FUNC,
150b5fffbbbSjsing .opt.argfunc = genpkey_opt_algorithm,
151b5fffbbbSjsing },
152b5fffbbbSjsing {
153b5fffbbbSjsing .name = "genparam",
154b5fffbbbSjsing .desc = "Generate a set of parameters instead of a private key",
155b5fffbbbSjsing .type = OPTION_FLAG,
156e7718adaStb .opt.flag = &cfg.do_param,
157b5fffbbbSjsing },
158b5fffbbbSjsing {
159b5fffbbbSjsing .name = "out",
160b5fffbbbSjsing .argname = "file",
161b5fffbbbSjsing .desc = "Output file to write to (default stdout)",
162b5fffbbbSjsing .type = OPTION_ARG,
163e7718adaStb .opt.arg = &cfg.outfile,
164b5fffbbbSjsing },
165b5fffbbbSjsing {
166b5fffbbbSjsing .name = "outform",
167b5fffbbbSjsing .argname = "format",
168b5fffbbbSjsing .desc = "Output format (DER or PEM)",
169b5fffbbbSjsing .type = OPTION_ARG_FORMAT,
170e7718adaStb .opt.value = &cfg.outformat,
171b5fffbbbSjsing },
172b5fffbbbSjsing {
173b5fffbbbSjsing .name = "paramfile",
174b5fffbbbSjsing .argname = "file",
175b5fffbbbSjsing .desc = "File to load public key algorithm parameters from\n"
176b5fffbbbSjsing "(must precede -pkeyopt)",
177b5fffbbbSjsing .type = OPTION_ARG_FUNC,
178b5fffbbbSjsing .opt.argfunc = genpkey_opt_paramfile,
179b5fffbbbSjsing },
180b5fffbbbSjsing {
181b5fffbbbSjsing .name = "pass",
182b5fffbbbSjsing .argname = "arg",
183b5fffbbbSjsing .desc = "Output file password source",
184b5fffbbbSjsing .type = OPTION_ARG,
185e7718adaStb .opt.arg = &cfg.passarg,
186b5fffbbbSjsing },
187b5fffbbbSjsing {
188b5fffbbbSjsing .name = "pkeyopt",
189b5fffbbbSjsing .argname = "opt:value",
190b5fffbbbSjsing .desc = "Set public key algorithm option to the given value",
191b5fffbbbSjsing .type = OPTION_ARG_FUNC,
192b5fffbbbSjsing .opt.argfunc = genpkey_opt_pkeyopt,
193b5fffbbbSjsing },
194b5fffbbbSjsing {
195b5fffbbbSjsing .name = "text",
196b5fffbbbSjsing .desc = "Print the private/public key in human readable form",
197b5fffbbbSjsing .type = OPTION_FLAG,
198e7718adaStb .opt.flag = &cfg.text,
199b5fffbbbSjsing },
200b5fffbbbSjsing {
201b5fffbbbSjsing .name = NULL,
202b5fffbbbSjsing .type = OPTION_ARGV_FUNC,
203b5fffbbbSjsing .opt.argvfunc = genpkey_opt_cipher,
204b5fffbbbSjsing },
205b5fffbbbSjsing {NULL},
206b5fffbbbSjsing };
207b5fffbbbSjsing
208b5fffbbbSjsing static void
genpkey_usage(void)209*440d1414Stb genpkey_usage(void)
210b5fffbbbSjsing {
211b5fffbbbSjsing fprintf(stderr,
212b5fffbbbSjsing "usage: genpkey [-algorithm alg] [cipher] [-genparam] [-out file]\n"
213b5fffbbbSjsing " [-outform der | pem] [-paramfile file] [-pass arg]\n"
214b5fffbbbSjsing " [-pkeyopt opt:value] [-text]\n\n");
215b5fffbbbSjsing options_usage(genpkey_options);
216b5fffbbbSjsing }
217b5fffbbbSjsing
218dab3f910Sjsing int
genpkey_main(int argc,char ** argv)219dab3f910Sjsing genpkey_main(int argc, char **argv)
220dab3f910Sjsing {
221dab3f910Sjsing BIO *in = NULL, *out = NULL;
222dab3f910Sjsing EVP_PKEY_CTX *ctx = NULL;
223b5fffbbbSjsing EVP_PKEY *pkey = NULL;
224dab3f910Sjsing char *pass = NULL;
225dab3f910Sjsing int ret = 1, rv;
226dab3f910Sjsing
22751811eadSderaadt if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
2289bc487adSdoug perror("pledge");
229e370f0eeSdoug exit(1);
230e370f0eeSdoug }
2319bc487adSdoug
232e7718adaStb memset(&cfg, 0, sizeof(cfg));
233e7718adaStb cfg.ctx = &ctx;
234e7718adaStb cfg.outformat = FORMAT_PEM;
235dab3f910Sjsing
236b5fffbbbSjsing if (options_parse(argc, argv, genpkey_options, NULL, NULL) != 0) {
237b5fffbbbSjsing genpkey_usage();
238dab3f910Sjsing goto end;
239dab3f910Sjsing }
240dab3f910Sjsing
241b5fffbbbSjsing if (ctx == NULL) {
242b5fffbbbSjsing genpkey_usage();
243dab3f910Sjsing goto end;
244dab3f910Sjsing }
245b5fffbbbSjsing
246e7718adaStb if (!app_passwd(bio_err, cfg.passarg, NULL, &pass, NULL)) {
247dab3f910Sjsing BIO_puts(bio_err, "Error getting password\n");
248dab3f910Sjsing goto end;
249dab3f910Sjsing }
250e7718adaStb if (cfg.outfile != NULL) {
251e7718adaStb if ((out = BIO_new_file(cfg.outfile, "wb")) ==
252b5fffbbbSjsing NULL) {
253b5fffbbbSjsing BIO_printf(bio_err, "Can't open output file %s\n",
254e7718adaStb cfg.outfile);
255dab3f910Sjsing goto end;
256dab3f910Sjsing }
257dab3f910Sjsing } else {
258dab3f910Sjsing out = BIO_new_fp(stdout, BIO_NOCLOSE);
259dab3f910Sjsing }
260dab3f910Sjsing
261dab3f910Sjsing EVP_PKEY_CTX_set_cb(ctx, genpkey_cb);
262dab3f910Sjsing EVP_PKEY_CTX_set_app_data(ctx, bio_err);
263dab3f910Sjsing
264e7718adaStb if (cfg.do_param) {
265dab3f910Sjsing if (EVP_PKEY_paramgen(ctx, &pkey) <= 0) {
266dab3f910Sjsing BIO_puts(bio_err, "Error generating parameters\n");
267dab3f910Sjsing ERR_print_errors(bio_err);
268dab3f910Sjsing goto end;
269dab3f910Sjsing }
270dab3f910Sjsing } else {
271dab3f910Sjsing if (EVP_PKEY_keygen(ctx, &pkey) <= 0) {
272dab3f910Sjsing BIO_puts(bio_err, "Error generating key\n");
273dab3f910Sjsing ERR_print_errors(bio_err);
274dab3f910Sjsing goto end;
275dab3f910Sjsing }
276dab3f910Sjsing }
277dab3f910Sjsing
278e7718adaStb if (cfg.do_param)
279dab3f910Sjsing rv = PEM_write_bio_Parameters(out, pkey);
280e7718adaStb else if (cfg.outformat == FORMAT_PEM)
281e7718adaStb rv = PEM_write_bio_PrivateKey(out, pkey, cfg.cipher,
282b5fffbbbSjsing NULL, 0, NULL, pass);
283e7718adaStb else if (cfg.outformat == FORMAT_ASN1)
284dab3f910Sjsing rv = i2d_PrivateKey_bio(out, pkey);
285dab3f910Sjsing else {
286dab3f910Sjsing BIO_printf(bio_err, "Bad format specified for key\n");
287dab3f910Sjsing goto end;
288dab3f910Sjsing }
289dab3f910Sjsing
290dab3f910Sjsing if (rv <= 0) {
291dab3f910Sjsing BIO_puts(bio_err, "Error writing key\n");
292dab3f910Sjsing ERR_print_errors(bio_err);
293dab3f910Sjsing }
294e7718adaStb if (cfg.text) {
295e7718adaStb if (cfg.do_param)
296dab3f910Sjsing rv = EVP_PKEY_print_params(out, pkey, 0, NULL);
297dab3f910Sjsing else
298dab3f910Sjsing rv = EVP_PKEY_print_private(out, pkey, 0, NULL);
299dab3f910Sjsing
300dab3f910Sjsing if (rv <= 0) {
301dab3f910Sjsing BIO_puts(bio_err, "Error printing key\n");
302dab3f910Sjsing ERR_print_errors(bio_err);
303dab3f910Sjsing }
304dab3f910Sjsing }
305dab3f910Sjsing ret = 0;
306dab3f910Sjsing
307dab3f910Sjsing end:
308dab3f910Sjsing EVP_PKEY_free(pkey);
309dab3f910Sjsing EVP_PKEY_CTX_free(ctx);
310dab3f910Sjsing BIO_free_all(out);
311dab3f910Sjsing BIO_free(in);
312dab3f910Sjsing free(pass);
313dab3f910Sjsing
314dab3f910Sjsing return ret;
315dab3f910Sjsing }
316dab3f910Sjsing
317dab3f910Sjsing static int
init_keygen_file(BIO * err,EVP_PKEY_CTX ** pctx,const char * file)318b5fffbbbSjsing init_keygen_file(BIO * err, EVP_PKEY_CTX ** pctx, const char *file)
319dab3f910Sjsing {
320dab3f910Sjsing BIO *pbio;
321dab3f910Sjsing EVP_PKEY *pkey = NULL;
322dab3f910Sjsing EVP_PKEY_CTX *ctx = NULL;
323dab3f910Sjsing if (*pctx) {
324dab3f910Sjsing BIO_puts(err, "Parameters already set!\n");
325dab3f910Sjsing return 0;
326dab3f910Sjsing }
327dab3f910Sjsing pbio = BIO_new_file(file, "r");
328dab3f910Sjsing if (!pbio) {
329dab3f910Sjsing BIO_printf(err, "Can't open parameter file %s\n", file);
330dab3f910Sjsing return 0;
331dab3f910Sjsing }
332dab3f910Sjsing pkey = PEM_read_bio_Parameters(pbio, NULL);
333dab3f910Sjsing BIO_free(pbio);
334dab3f910Sjsing
335dab3f910Sjsing if (!pkey) {
336dab3f910Sjsing BIO_printf(bio_err, "Error reading parameter file %s\n", file);
337dab3f910Sjsing return 0;
338dab3f910Sjsing }
3395284dfeaSbcook ctx = EVP_PKEY_CTX_new(pkey, NULL);
340dab3f910Sjsing if (!ctx)
341dab3f910Sjsing goto err;
342dab3f910Sjsing if (EVP_PKEY_keygen_init(ctx) <= 0)
343dab3f910Sjsing goto err;
344dab3f910Sjsing EVP_PKEY_free(pkey);
345dab3f910Sjsing *pctx = ctx;
346dab3f910Sjsing return 1;
347dab3f910Sjsing
348dab3f910Sjsing err:
349dab3f910Sjsing BIO_puts(err, "Error initializing context\n");
350dab3f910Sjsing ERR_print_errors(err);
351dab3f910Sjsing EVP_PKEY_CTX_free(ctx);
352dab3f910Sjsing EVP_PKEY_free(pkey);
353dab3f910Sjsing return 0;
354dab3f910Sjsing
355dab3f910Sjsing }
356dab3f910Sjsing
357dab3f910Sjsing int
init_gen_str(BIO * err,EVP_PKEY_CTX ** pctx,const char * algname,int do_param)358b5fffbbbSjsing init_gen_str(BIO * err, EVP_PKEY_CTX ** pctx, const char *algname, int do_param)
359dab3f910Sjsing {
360dab3f910Sjsing const EVP_PKEY_ASN1_METHOD *ameth;
361b5fffbbbSjsing EVP_PKEY_CTX *ctx = NULL;
362dab3f910Sjsing int pkey_id;
363dab3f910Sjsing
364dab3f910Sjsing if (*pctx) {
365dab3f910Sjsing BIO_puts(err, "Algorithm already set!\n");
366dab3f910Sjsing return 0;
367dab3f910Sjsing }
3685284dfeaSbcook ameth = EVP_PKEY_asn1_find_str(NULL, algname, -1);
369dab3f910Sjsing
370dab3f910Sjsing if (!ameth) {
371dab3f910Sjsing BIO_printf(bio_err, "Algorithm %s not found\n", algname);
372dab3f910Sjsing return 0;
373dab3f910Sjsing }
374dab3f910Sjsing ERR_clear_error();
375dab3f910Sjsing
376dab3f910Sjsing EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, ameth);
3775284dfeaSbcook ctx = EVP_PKEY_CTX_new_id(pkey_id, NULL);
378dab3f910Sjsing
379dab3f910Sjsing if (!ctx)
380dab3f910Sjsing goto err;
381dab3f910Sjsing if (do_param) {
382dab3f910Sjsing if (EVP_PKEY_paramgen_init(ctx) <= 0)
383dab3f910Sjsing goto err;
384dab3f910Sjsing } else {
385dab3f910Sjsing if (EVP_PKEY_keygen_init(ctx) <= 0)
386dab3f910Sjsing goto err;
387dab3f910Sjsing }
388dab3f910Sjsing
389dab3f910Sjsing *pctx = ctx;
390dab3f910Sjsing return 1;
391dab3f910Sjsing
392dab3f910Sjsing err:
393dab3f910Sjsing BIO_printf(err, "Error initializing %s context\n", algname);
394dab3f910Sjsing ERR_print_errors(err);
395dab3f910Sjsing EVP_PKEY_CTX_free(ctx);
396dab3f910Sjsing return 0;
397dab3f910Sjsing
398dab3f910Sjsing }
399dab3f910Sjsing
400dab3f910Sjsing static int
genpkey_cb(EVP_PKEY_CTX * ctx)401dab3f910Sjsing genpkey_cb(EVP_PKEY_CTX * ctx)
402dab3f910Sjsing {
403dab3f910Sjsing char c = '*';
404dab3f910Sjsing BIO *b = EVP_PKEY_CTX_get_app_data(ctx);
405dab3f910Sjsing int p;
406dab3f910Sjsing p = EVP_PKEY_CTX_get_keygen_info(ctx, 0);
407dab3f910Sjsing if (p == 0)
408dab3f910Sjsing c = '.';
409dab3f910Sjsing if (p == 1)
410dab3f910Sjsing c = '+';
411dab3f910Sjsing if (p == 2)
412dab3f910Sjsing c = '*';
413dab3f910Sjsing if (p == 3)
414dab3f910Sjsing c = '\n';
415dab3f910Sjsing BIO_write(b, &c, 1);
416dab3f910Sjsing (void) BIO_flush(b);
417dab3f910Sjsing return 1;
418dab3f910Sjsing }
419