Annotation of src/usr.bin/openssl/genpkey.c, Revision 1.14
1.14 ! joshua 1: /* $OpenBSD: genpkey.c,v 1.13 2019/07/14 03:30:46 guenther Exp $ */
1.1 jsing 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:
59: #include <stdio.h>
60: #include <string.h>
61:
62: #include "apps.h"
63:
64: #include <openssl/err.h>
65: #include <openssl/evp.h>
66: #include <openssl/pem.h>
67:
1.12 jsing 68: static int init_keygen_file(BIO * err, EVP_PKEY_CTX **pctx, const char *file);
69: static int genpkey_cb(EVP_PKEY_CTX * ctx);
70:
71: struct {
72: const EVP_CIPHER *cipher;
73: EVP_PKEY_CTX **ctx;
74: int do_param;
75: char *outfile;
76: int outformat;
77: char *passarg;
78: int text;
79: } genpkey_config;
80:
81: static int
82: genpkey_opt_algorithm(char *arg)
83: {
84: if (!init_gen_str(bio_err, genpkey_config.ctx, arg,
85: genpkey_config.do_param))
86: return (1);
87:
88: return (0);
89: }
90:
91: static int
92: genpkey_opt_cipher(int argc, char **argv, int *argsused)
93: {
94: char *name = argv[0];
95:
96: if (*name++ != '-')
97: return (1);
98:
99: if (genpkey_config.do_param == 1)
100: return (1);
101:
102: if (strcmp(name, "none") == 0) {
103: genpkey_config.cipher = NULL;
104: *argsused = 1;
105: return (0);
106: }
107:
108: if ((genpkey_config.cipher = EVP_get_cipherbyname(name)) != NULL) {
109: *argsused = 1;
110: return (0);
111: }
112:
113: return (1);
114: }
115:
116: static int
117: genpkey_opt_paramfile(char *arg)
118: {
119: if (genpkey_config.do_param == 1)
120: return (1);
121: if (!init_keygen_file(bio_err, genpkey_config.ctx, arg))
122: return (1);
123:
124: return (0);
125: }
126:
1.1 jsing 127: static int
1.12 jsing 128: genpkey_opt_pkeyopt(char *arg)
129: {
130: if (*genpkey_config.ctx == NULL) {
131: BIO_puts(bio_err, "No keytype specified\n");
132: return (1);
133: }
134:
135: if (pkey_ctrl_string(*genpkey_config.ctx, arg) <= 0) {
136: BIO_puts(bio_err, "parameter setting error\n");
137: ERR_print_errors(bio_err);
138: return (1);
139: }
140:
141: return (0);
142: }
143:
1.13 guenther 144: static const struct option genpkey_options[] = {
1.12 jsing 145: {
146: .name = "algorithm",
147: .argname = "name",
148: .desc = "Public key algorithm to use (must precede -pkeyopt)",
149: .type = OPTION_ARG_FUNC,
150: .opt.argfunc = genpkey_opt_algorithm,
151: },
152: {
153: .name = "genparam",
154: .desc = "Generate a set of parameters instead of a private key",
155: .type = OPTION_FLAG,
156: .opt.flag = &genpkey_config.do_param,
157: },
158: {
159: .name = "out",
160: .argname = "file",
161: .desc = "Output file to write to (default stdout)",
162: .type = OPTION_ARG,
163: .opt.arg = &genpkey_config.outfile,
164: },
165: {
166: .name = "outform",
167: .argname = "format",
168: .desc = "Output format (DER or PEM)",
169: .type = OPTION_ARG_FORMAT,
170: .opt.value = &genpkey_config.outformat,
171: },
172: {
173: .name = "paramfile",
174: .argname = "file",
175: .desc = "File to load public key algorithm parameters from\n"
176: "(must precede -pkeyopt)",
177: .type = OPTION_ARG_FUNC,
178: .opt.argfunc = genpkey_opt_paramfile,
179: },
180: {
181: .name = "pass",
182: .argname = "arg",
183: .desc = "Output file password source",
184: .type = OPTION_ARG,
185: .opt.arg = &genpkey_config.passarg,
186: },
187: {
188: .name = "pkeyopt",
189: .argname = "opt:value",
190: .desc = "Set public key algorithm option to the given value",
191: .type = OPTION_ARG_FUNC,
192: .opt.argfunc = genpkey_opt_pkeyopt,
193: },
194: {
195: .name = "text",
196: .desc = "Print the private/public key in human readable form",
197: .type = OPTION_FLAG,
198: .opt.flag = &genpkey_config.text,
199: },
200: {
201: .name = NULL,
202: .type = OPTION_ARGV_FUNC,
203: .opt.argvfunc = genpkey_opt_cipher,
204: },
205: {NULL},
206: };
207:
208: static void
209: genpkey_usage()
210: {
211: fprintf(stderr,
212: "usage: genpkey [-algorithm alg] [cipher] [-genparam] [-out file]\n"
213: " [-outform der | pem] [-paramfile file] [-pass arg]\n"
214: " [-pkeyopt opt:value] [-text]\n\n");
215: options_usage(genpkey_options);
216: }
1.1 jsing 217:
218: int
219: genpkey_main(int argc, char **argv)
220: {
221: BIO *in = NULL, *out = NULL;
1.12 jsing 222: EVP_PKEY_CTX *ctx = NULL;
1.1 jsing 223: EVP_PKEY *pkey = NULL;
224: char *pass = NULL;
225: int ret = 1, rv;
226:
1.14 ! joshua 227: if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
! 228: perror("pledge");
! 229: exit(1);
1.6 doug 230: }
1.1 jsing 231:
1.12 jsing 232: memset(&genpkey_config, 0, sizeof(genpkey_config));
233: genpkey_config.ctx = &ctx;
234: genpkey_config.outformat = FORMAT_PEM;
1.1 jsing 235:
1.12 jsing 236: if (options_parse(argc, argv, genpkey_options, NULL, NULL) != 0) {
237: genpkey_usage();
238: goto end;
1.1 jsing 239: }
240:
1.12 jsing 241: if (ctx == NULL) {
242: genpkey_usage();
1.1 jsing 243: goto end;
244: }
1.12 jsing 245:
246: if (!app_passwd(bio_err, genpkey_config.passarg, NULL, &pass, NULL)) {
1.1 jsing 247: BIO_puts(bio_err, "Error getting password\n");
248: goto end;
249: }
1.12 jsing 250: if (genpkey_config.outfile != NULL) {
251: if ((out = BIO_new_file(genpkey_config.outfile, "wb")) ==
252: NULL) {
253: BIO_printf(bio_err, "Can't open output file %s\n",
254: genpkey_config.outfile);
1.1 jsing 255: goto end;
256: }
257: } else {
258: out = BIO_new_fp(stdout, BIO_NOCLOSE);
259: }
260:
261: EVP_PKEY_CTX_set_cb(ctx, genpkey_cb);
262: EVP_PKEY_CTX_set_app_data(ctx, bio_err);
263:
1.12 jsing 264: if (genpkey_config.do_param) {
1.1 jsing 265: if (EVP_PKEY_paramgen(ctx, &pkey) <= 0) {
266: BIO_puts(bio_err, "Error generating parameters\n");
267: ERR_print_errors(bio_err);
268: goto end;
269: }
270: } else {
271: if (EVP_PKEY_keygen(ctx, &pkey) <= 0) {
272: BIO_puts(bio_err, "Error generating key\n");
273: ERR_print_errors(bio_err);
274: goto end;
275: }
276: }
277:
1.12 jsing 278: if (genpkey_config.do_param)
1.1 jsing 279: rv = PEM_write_bio_Parameters(out, pkey);
1.12 jsing 280: else if (genpkey_config.outformat == FORMAT_PEM)
281: rv = PEM_write_bio_PrivateKey(out, pkey, genpkey_config.cipher,
282: NULL, 0, NULL, pass);
283: else if (genpkey_config.outformat == FORMAT_ASN1)
1.1 jsing 284: rv = i2d_PrivateKey_bio(out, pkey);
285: else {
286: BIO_printf(bio_err, "Bad format specified for key\n");
287: goto end;
288: }
289:
290: if (rv <= 0) {
291: BIO_puts(bio_err, "Error writing key\n");
292: ERR_print_errors(bio_err);
293: }
1.12 jsing 294: if (genpkey_config.text) {
295: if (genpkey_config.do_param)
1.1 jsing 296: rv = EVP_PKEY_print_params(out, pkey, 0, NULL);
297: else
298: rv = EVP_PKEY_print_private(out, pkey, 0, NULL);
299:
300: if (rv <= 0) {
301: BIO_puts(bio_err, "Error printing key\n");
302: ERR_print_errors(bio_err);
303: }
304: }
305: ret = 0;
306:
1.11 jsing 307: end:
1.10 jsing 308: EVP_PKEY_free(pkey);
309: EVP_PKEY_CTX_free(ctx);
310: BIO_free_all(out);
1.1 jsing 311: BIO_free(in);
312: free(pass);
313:
314: return ret;
315: }
316:
317: static int
1.12 jsing 318: init_keygen_file(BIO * err, EVP_PKEY_CTX ** pctx, const char *file)
1.1 jsing 319: {
320: BIO *pbio;
321: EVP_PKEY *pkey = NULL;
322: EVP_PKEY_CTX *ctx = NULL;
323: if (*pctx) {
324: BIO_puts(err, "Parameters already set!\n");
325: return 0;
326: }
327: pbio = BIO_new_file(file, "r");
328: if (!pbio) {
329: BIO_printf(err, "Can't open parameter file %s\n", file);
330: return 0;
331: }
332: pkey = PEM_read_bio_Parameters(pbio, NULL);
333: BIO_free(pbio);
334:
335: if (!pkey) {
336: BIO_printf(bio_err, "Error reading parameter file %s\n", file);
337: return 0;
338: }
1.5 bcook 339: ctx = EVP_PKEY_CTX_new(pkey, NULL);
1.1 jsing 340: if (!ctx)
341: goto err;
342: if (EVP_PKEY_keygen_init(ctx) <= 0)
343: goto err;
344: EVP_PKEY_free(pkey);
345: *pctx = ctx;
346: return 1;
347:
1.11 jsing 348: err:
1.1 jsing 349: BIO_puts(err, "Error initializing context\n");
350: ERR_print_errors(err);
1.10 jsing 351: EVP_PKEY_CTX_free(ctx);
352: EVP_PKEY_free(pkey);
1.1 jsing 353: return 0;
354:
355: }
356:
357: int
1.12 jsing 358: init_gen_str(BIO * err, EVP_PKEY_CTX ** pctx, const char *algname, int do_param)
1.1 jsing 359: {
1.12 jsing 360: const EVP_PKEY_ASN1_METHOD *ameth;
1.1 jsing 361: EVP_PKEY_CTX *ctx = NULL;
362: int pkey_id;
363:
364: if (*pctx) {
365: BIO_puts(err, "Algorithm already set!\n");
366: return 0;
367: }
1.5 bcook 368: ameth = EVP_PKEY_asn1_find_str(NULL, algname, -1);
1.1 jsing 369:
370: if (!ameth) {
371: BIO_printf(bio_err, "Algorithm %s not found\n", algname);
372: return 0;
373: }
374: ERR_clear_error();
375:
376: EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, ameth);
1.5 bcook 377: ctx = EVP_PKEY_CTX_new_id(pkey_id, NULL);
1.1 jsing 378:
379: if (!ctx)
380: goto err;
381: if (do_param) {
382: if (EVP_PKEY_paramgen_init(ctx) <= 0)
383: goto err;
384: } else {
385: if (EVP_PKEY_keygen_init(ctx) <= 0)
386: goto err;
387: }
388:
389: *pctx = ctx;
390: return 1;
391:
1.11 jsing 392: err:
1.1 jsing 393: BIO_printf(err, "Error initializing %s context\n", algname);
394: ERR_print_errors(err);
1.10 jsing 395: EVP_PKEY_CTX_free(ctx);
1.1 jsing 396: return 0;
397:
398: }
399:
400: static int
401: genpkey_cb(EVP_PKEY_CTX * ctx)
402: {
403: char c = '*';
404: BIO *b = EVP_PKEY_CTX_get_app_data(ctx);
405: int p;
406: p = EVP_PKEY_CTX_get_keygen_info(ctx, 0);
407: if (p == 0)
408: c = '.';
409: if (p == 1)
410: c = '+';
411: if (p == 2)
412: c = '*';
413: if (p == 3)
414: c = '\n';
415: BIO_write(b, &c, 1);
416: (void) BIO_flush(b);
417: return 1;
418: }
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