Annotation of src/usr.bin/openssl/genpkey.c, Revision 1.12
1.12 ! jsing 1: /* $OpenBSD: genpkey.c,v 1.11 2018/02/07 05:47:55 jsing 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:
! 144: struct option genpkey_options[] = {
! 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:
1.6 doug 227: if (single_execution) {
1.9 deraadt 228: if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
1.6 doug 229: perror("pledge");
1.8 doug 230: exit(1);
231: }
1.6 doug 232: }
1.1 jsing 233:
1.12 ! jsing 234: memset(&genpkey_config, 0, sizeof(genpkey_config));
! 235: genpkey_config.ctx = &ctx;
! 236: genpkey_config.outformat = FORMAT_PEM;
1.1 jsing 237:
1.12 ! jsing 238: if (options_parse(argc, argv, genpkey_options, NULL, NULL) != 0) {
! 239: genpkey_usage();
! 240: goto end;
1.1 jsing 241: }
242:
1.12 ! jsing 243: if (ctx == NULL) {
! 244: genpkey_usage();
1.1 jsing 245: goto end;
246: }
1.12 ! jsing 247:
! 248: if (!app_passwd(bio_err, genpkey_config.passarg, NULL, &pass, NULL)) {
1.1 jsing 249: BIO_puts(bio_err, "Error getting password\n");
250: goto end;
251: }
1.12 ! jsing 252: if (genpkey_config.outfile != NULL) {
! 253: if ((out = BIO_new_file(genpkey_config.outfile, "wb")) ==
! 254: NULL) {
! 255: BIO_printf(bio_err, "Can't open output file %s\n",
! 256: genpkey_config.outfile);
1.1 jsing 257: goto end;
258: }
259: } else {
260: out = BIO_new_fp(stdout, BIO_NOCLOSE);
261: }
262:
263: EVP_PKEY_CTX_set_cb(ctx, genpkey_cb);
264: EVP_PKEY_CTX_set_app_data(ctx, bio_err);
265:
1.12 ! jsing 266: if (genpkey_config.do_param) {
1.1 jsing 267: if (EVP_PKEY_paramgen(ctx, &pkey) <= 0) {
268: BIO_puts(bio_err, "Error generating parameters\n");
269: ERR_print_errors(bio_err);
270: goto end;
271: }
272: } else {
273: if (EVP_PKEY_keygen(ctx, &pkey) <= 0) {
274: BIO_puts(bio_err, "Error generating key\n");
275: ERR_print_errors(bio_err);
276: goto end;
277: }
278: }
279:
1.12 ! jsing 280: if (genpkey_config.do_param)
1.1 jsing 281: rv = PEM_write_bio_Parameters(out, pkey);
1.12 ! jsing 282: else if (genpkey_config.outformat == FORMAT_PEM)
! 283: rv = PEM_write_bio_PrivateKey(out, pkey, genpkey_config.cipher,
! 284: NULL, 0, NULL, pass);
! 285: else if (genpkey_config.outformat == FORMAT_ASN1)
1.1 jsing 286: rv = i2d_PrivateKey_bio(out, pkey);
287: else {
288: BIO_printf(bio_err, "Bad format specified for key\n");
289: goto end;
290: }
291:
292: if (rv <= 0) {
293: BIO_puts(bio_err, "Error writing key\n");
294: ERR_print_errors(bio_err);
295: }
1.12 ! jsing 296: if (genpkey_config.text) {
! 297: if (genpkey_config.do_param)
1.1 jsing 298: rv = EVP_PKEY_print_params(out, pkey, 0, NULL);
299: else
300: rv = EVP_PKEY_print_private(out, pkey, 0, NULL);
301:
302: if (rv <= 0) {
303: BIO_puts(bio_err, "Error printing key\n");
304: ERR_print_errors(bio_err);
305: }
306: }
307: ret = 0;
308:
1.11 jsing 309: end:
1.10 jsing 310: EVP_PKEY_free(pkey);
311: EVP_PKEY_CTX_free(ctx);
312: BIO_free_all(out);
1.1 jsing 313: BIO_free(in);
314: free(pass);
315:
316: return ret;
317: }
318:
319: static int
1.12 ! jsing 320: init_keygen_file(BIO * err, EVP_PKEY_CTX ** pctx, const char *file)
1.1 jsing 321: {
322: BIO *pbio;
323: EVP_PKEY *pkey = NULL;
324: EVP_PKEY_CTX *ctx = NULL;
325: if (*pctx) {
326: BIO_puts(err, "Parameters already set!\n");
327: return 0;
328: }
329: pbio = BIO_new_file(file, "r");
330: if (!pbio) {
331: BIO_printf(err, "Can't open parameter file %s\n", file);
332: return 0;
333: }
334: pkey = PEM_read_bio_Parameters(pbio, NULL);
335: BIO_free(pbio);
336:
337: if (!pkey) {
338: BIO_printf(bio_err, "Error reading parameter file %s\n", file);
339: return 0;
340: }
1.5 bcook 341: ctx = EVP_PKEY_CTX_new(pkey, NULL);
1.1 jsing 342: if (!ctx)
343: goto err;
344: if (EVP_PKEY_keygen_init(ctx) <= 0)
345: goto err;
346: EVP_PKEY_free(pkey);
347: *pctx = ctx;
348: return 1;
349:
1.11 jsing 350: err:
1.1 jsing 351: BIO_puts(err, "Error initializing context\n");
352: ERR_print_errors(err);
1.10 jsing 353: EVP_PKEY_CTX_free(ctx);
354: EVP_PKEY_free(pkey);
1.1 jsing 355: return 0;
356:
357: }
358:
359: int
1.12 ! jsing 360: init_gen_str(BIO * err, EVP_PKEY_CTX ** pctx, const char *algname, int do_param)
1.1 jsing 361: {
1.12 ! jsing 362: const EVP_PKEY_ASN1_METHOD *ameth;
1.1 jsing 363: EVP_PKEY_CTX *ctx = NULL;
364: int pkey_id;
365:
366: if (*pctx) {
367: BIO_puts(err, "Algorithm already set!\n");
368: return 0;
369: }
1.5 bcook 370: ameth = EVP_PKEY_asn1_find_str(NULL, algname, -1);
1.1 jsing 371:
372: if (!ameth) {
373: BIO_printf(bio_err, "Algorithm %s not found\n", algname);
374: return 0;
375: }
376: ERR_clear_error();
377:
378: EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, ameth);
1.5 bcook 379: ctx = EVP_PKEY_CTX_new_id(pkey_id, NULL);
1.1 jsing 380:
381: if (!ctx)
382: goto err;
383: if (do_param) {
384: if (EVP_PKEY_paramgen_init(ctx) <= 0)
385: goto err;
386: } else {
387: if (EVP_PKEY_keygen_init(ctx) <= 0)
388: goto err;
389: }
390:
391: *pctx = ctx;
392: return 1;
393:
1.11 jsing 394: err:
1.1 jsing 395: BIO_printf(err, "Error initializing %s context\n", algname);
396: ERR_print_errors(err);
1.10 jsing 397: EVP_PKEY_CTX_free(ctx);
1.1 jsing 398: return 0;
399:
400: }
401:
402: static int
403: genpkey_cb(EVP_PKEY_CTX * ctx)
404: {
405: char c = '*';
406: BIO *b = EVP_PKEY_CTX_get_app_data(ctx);
407: int p;
408: p = EVP_PKEY_CTX_get_keygen_info(ctx, 0);
409: if (p == 0)
410: c = '.';
411: if (p == 1)
412: c = '+';
413: if (p == 2)
414: c = '*';
415: if (p == 3)
416: c = '\n';
417: BIO_write(b, &c, 1);
418: (void) BIO_flush(b);
419: return 1;
420: }
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