2 * Copyright 2006-2024 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
14 #include <openssl/pem.h>
15 #include <openssl/err.h>
16 #include <openssl/evp.h>
18 static int verbose = 1;
20 static int init_keygen_file(EVP_PKEY_CTX **pctx, const char *file, ENGINE *e,
21 OSSL_LIB_CTX *libctx, const char *propq);
22 typedef enum OPTION_choice {
24 OPT_ENGINE, OPT_OUTFORM, OPT_OUT, OPT_PASS, OPT_PARAMFILE,
25 OPT_ALGORITHM, OPT_PKEYOPT, OPT_GENPARAM, OPT_TEXT, OPT_CIPHER,
26 OPT_VERBOSE, OPT_QUIET, OPT_CONFIG, OPT_OUTPUBKEY,
27 OPT_PROV_ENUM, OPT_R_ENUM
30 const OPTIONS genpkey_options[] = {
31 OPT_SECTION("General"),
32 {"help", OPT_HELP, '-', "Display this summary"},
33 #ifndef OPENSSL_NO_ENGINE
34 {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
36 {"paramfile", OPT_PARAMFILE, '<', "Parameters file"},
37 {"algorithm", OPT_ALGORITHM, 's', "The public key algorithm"},
38 {"verbose", OPT_VERBOSE, '-', "Output status while generating keys"},
39 {"quiet", OPT_QUIET, '-', "Do not output status while generating keys"},
40 {"pkeyopt", OPT_PKEYOPT, 's',
41 "Set the public key algorithm option as opt:value"},
44 OPT_SECTION("Output"),
45 {"out", OPT_OUT, '>', "Output (private key) file"},
46 {"outpubkey", OPT_OUTPUBKEY, '>', "Output public key file"},
47 {"outform", OPT_OUTFORM, 'F', "output format (DER or PEM)"},
48 {"pass", OPT_PASS, 's', "Output file pass phrase source"},
49 {"genparam", OPT_GENPARAM, '-', "Generate parameters, not key"},
50 {"text", OPT_TEXT, '-', "Print the private key in text"},
51 {"", OPT_CIPHER, '-', "Cipher to use to encrypt the key"},
56 /* This is deliberately last. */
58 "Order of options may be important! See the documentation.\n"},
62 static const char *param_datatype_2name(unsigned int type, int *ishex)
67 case OSSL_PARAM_INTEGER: return "int";
68 case OSSL_PARAM_UNSIGNED_INTEGER: return "uint";
69 case OSSL_PARAM_REAL: return "float";
70 case OSSL_PARAM_OCTET_STRING: *ishex = 1; return "string";
71 case OSSL_PARAM_UTF8_STRING: return "string";
77 static void show_gen_pkeyopt(const char *algname, OSSL_LIB_CTX *libctx, const char *propq)
79 EVP_PKEY_CTX *ctx = NULL;
80 const OSSL_PARAM *params;
85 ctx = EVP_PKEY_CTX_new_from_name(libctx, algname, propq);
89 if (EVP_PKEY_keygen_init(ctx) <= 0)
91 params = EVP_PKEY_CTX_settable_params(ctx);
95 BIO_printf(bio_err, "\nThe possible -pkeyopt arguments are:\n");
96 for (i = 0; params[i].key != NULL; ++i) {
97 const char *name = param_datatype_2name(params[i].data_type, &ishex);
100 BIO_printf(bio_err, " %s%s:%s\n", ishex ? "hex" : "", params[i].key, name);
103 EVP_PKEY_CTX_free(ctx);
106 int genpkey_main(int argc, char **argv)
109 BIO *in = NULL, *out = NULL, *outpubkey = NULL;
111 EVP_PKEY *pkey = NULL;
112 EVP_PKEY_CTX *ctx = NULL;
113 char *outfile = NULL, *passarg = NULL, *pass = NULL, *prog, *p;
114 char *outpubkeyfile = NULL;
115 const char *ciphername = NULL, *paramfile = NULL, *algname = NULL;
116 EVP_CIPHER *cipher = NULL;
118 int outformat = FORMAT_PEM, text = 0, ret = 1, rv, do_param = 0;
120 OSSL_LIB_CTX *libctx = app_get0_libctx();
121 STACK_OF(OPENSSL_STRING) *keyopt = NULL;
123 opt_set_unknown_name("cipher");
124 prog = opt_init(argc, argv, genpkey_options);
125 keyopt = sk_OPENSSL_STRING_new_null();
128 while ((o = opt_next()) != OPT_EOF) {
133 BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
137 opt_help(genpkey_options);
138 show_gen_pkeyopt(algname, libctx, app_get0_propq());
141 if (!opt_format(opt_arg(), OPT_FMT_PEMDER, &outformat))
148 outpubkeyfile = opt_arg();
154 e = setup_engine(opt_arg(), 0);
159 paramfile = opt_arg();
165 if (!sk_OPENSSL_STRING_push(keyopt, opt_arg()))
181 ciphername = opt_unknown();
184 conf = app_load_config_modules(opt_arg());
189 if (!opt_provider(o))
199 /* No extra arguments. */
200 if (!opt_check_rest_arg(NULL))
203 if (!app_RAND_load())
206 /* Fetch cipher, etc. */
207 if (paramfile != NULL) {
208 if (!init_keygen_file(&ctx, paramfile, e, libctx, app_get0_propq()))
211 if (algname != NULL) {
212 if (!init_gen_str(&ctx, algname, e, do_param, libctx, app_get0_propq()))
218 for (i = 0; i < sk_OPENSSL_STRING_num(keyopt); i++) {
219 p = sk_OPENSSL_STRING_value(keyopt, i);
220 if (pkey_ctrl_string(ctx, p) <= 0) {
221 BIO_printf(bio_err, "%s: Error setting %s parameter:\n", prog, p);
222 ERR_print_errors(bio_err);
226 if (!opt_cipher(ciphername, &cipher))
228 if (ciphername != NULL && do_param == 1) {
229 BIO_printf(bio_err, "Cannot use cipher with -genparam option\n");
233 private = do_param ? 0 : 1;
235 if (!app_passwd(passarg, NULL, &pass, NULL)) {
236 BIO_puts(bio_err, "Error getting password\n");
240 out = bio_open_owner(outfile, outformat, private);
244 if (outpubkeyfile != NULL) {
245 outpubkey = bio_open_owner(outpubkeyfile, outformat, private);
246 if (outpubkey == NULL)
251 EVP_PKEY_CTX_set_cb(ctx, progress_cb);
252 EVP_PKEY_CTX_set_app_data(ctx, bio_err);
254 pkey = do_param ? app_paramgen(ctx, algname)
255 : app_keygen(ctx, algname, 0, 0 /* not verbose */);
260 rv = PEM_write_bio_Parameters(out, pkey);
261 } else if (outformat == FORMAT_PEM) {
263 rv = PEM_write_bio_PrivateKey(out, pkey, cipher, NULL, 0, NULL, pass);
264 if (rv > 0 && outpubkey != NULL)
265 rv = PEM_write_bio_PUBKEY(outpubkey, pkey);
266 } else if (outformat == FORMAT_ASN1) {
268 rv = i2d_PrivateKey_bio(out, pkey);
269 if (rv > 0 && outpubkey != NULL)
270 rv = i2d_PUBKEY_bio(outpubkey, pkey);
272 BIO_printf(bio_err, "Bad format specified for key\n");
279 BIO_puts(bio_err, "Error writing key(s)\n");
285 rv = EVP_PKEY_print_params(out, pkey, 0, NULL);
287 rv = EVP_PKEY_print_private(out, pkey, 0, NULL);
290 BIO_puts(bio_err, "Error printing key\n");
296 sk_OPENSSL_STRING_free(keyopt);
298 ERR_print_errors(bio_err);
300 EVP_PKEY_CTX_free(ctx);
301 EVP_CIPHER_free(cipher);
303 BIO_free_all(outpubkey);
311 static int init_keygen_file(EVP_PKEY_CTX **pctx, const char *file, ENGINE *e,
312 OSSL_LIB_CTX *libctx, const char *propq)
315 EVP_PKEY *pkey = NULL;
316 EVP_PKEY_CTX *ctx = NULL;
318 BIO_puts(bio_err, "Parameters already set!\n");
322 pbio = BIO_new_file(file, "r");
324 BIO_printf(bio_err, "Can't open parameter file %s\n", file);
328 pkey = PEM_read_bio_Parameters_ex(pbio, NULL, libctx, propq);
332 BIO_printf(bio_err, "Error reading parameter file %s\n", file);
337 ctx = EVP_PKEY_CTX_new(pkey, e);
339 ctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, propq);
342 if (EVP_PKEY_keygen_init(ctx) <= 0)
349 BIO_puts(bio_err, "Error initializing context\n");
350 ERR_print_errors(bio_err);
351 EVP_PKEY_CTX_free(ctx);
357 int init_gen_str(EVP_PKEY_CTX **pctx,
358 const char *algname, ENGINE *e, int do_param,
359 OSSL_LIB_CTX *libctx, const char *propq)
361 EVP_PKEY_CTX *ctx = NULL;
365 BIO_puts(bio_err, "Algorithm already set!\n");
369 pkey_id = get_legacy_pkey_id(libctx, algname, e);
370 if (pkey_id != NID_undef)
371 ctx = EVP_PKEY_CTX_new_id(pkey_id, e);
373 ctx = EVP_PKEY_CTX_new_from_name(libctx, algname, propq);
378 if (EVP_PKEY_paramgen_init(ctx) <= 0)
381 if (EVP_PKEY_keygen_init(ctx) <= 0)
389 BIO_printf(bio_err, "Error initializing %s context\n", algname);
390 ERR_print_errors(bio_err);
391 EVP_PKEY_CTX_free(ctx);