2 * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
44 print_int_text(const char *name, const unsigned char *buf, size_t len)
48 printf("%s = ", name);
49 for (u = 0; u < len; u ++) {
50 printf("%02X", buf[u]);
56 print_int_C(const char *name, const unsigned char *buf, size_t len)
60 printf("\nstatic const unsigned char %s[] = {", name);
61 for (u = 0; u < len; u ++) {
70 printf("0x%02X", buf[u]);
76 write_to_file(const char *name, const void *data, size_t len)
80 f = fopen(name, "wb");
83 "ERROR: cannot open file '%s' for writing\n",
87 if (fwrite(data, 1, len, f) != len) {
90 "ERROR: cannot write to file '%s'\n",
99 write_to_pem_file(const char *name,
100 const void *data, size_t len, const char *banner)
106 pemlen = br_pem_encode(NULL, NULL, len, banner, 0);
107 pem = xmalloc(pemlen + 1);
108 br_pem_encode(pem, data, len, banner, 0);
109 r = write_to_file(name, pem, pemlen);
115 print_rsa(const br_rsa_private_key *sk, outspec *os)
118 unsigned char *n, *d, *buf;
120 size_t nlen, dlen, len;
121 br_rsa_compute_modulus cm;
122 br_rsa_compute_pubexp ce;
123 br_rsa_compute_privexp cd;
124 br_rsa_public_key pk;
125 unsigned char ebuf[4];
131 if (os->print_text) {
132 print_int_text("p ", sk->p, sk->plen);
133 print_int_text("q ", sk->q, sk->qlen);
134 print_int_text("dp", sk->dp, sk->dplen);
135 print_int_text("dq", sk->dq, sk->dqlen);
136 print_int_text("iq", sk->iq, sk->iqlen);
139 print_int_C("RSA_P", sk->p, sk->plen);
140 print_int_C("RSA_Q", sk->q, sk->qlen);
141 print_int_C("RSA_DP", sk->dp, sk->dplen);
142 print_int_C("RSA_DQ", sk->dq, sk->dqlen);
143 print_int_C("RSA_IQ", sk->iq, sk->iqlen);
144 printf("\nstatic const br_rsa_private_key RSA = {\n");
145 printf("\t%lu,\n", (unsigned long)sk->n_bitlen);
146 printf("\t(unsigned char *)RSA_P, sizeof RSA_P,\n");
147 printf("\t(unsigned char *)RSA_Q, sizeof RSA_Q,\n");
148 printf("\t(unsigned char *)RSA_DP, sizeof RSA_DP,\n");
149 printf("\t(unsigned char *)RSA_DQ, sizeof RSA_DQ,\n");
150 printf("\t(unsigned char *)RSA_IQ, sizeof RSA_IQ\n");
154 if (os->rawder == NULL && os->rawpem == NULL
155 && os->pk8der == NULL && os->pk8pem == NULL)
160 cm = br_rsa_compute_modulus_get_default();
161 ce = br_rsa_compute_pubexp_get_default();
162 cd = br_rsa_compute_privexp_get_default();
165 goto print_RSA_error;
168 if (cm(n, sk) != nlen) {
169 goto print_RSA_error;
173 goto print_RSA_error;
175 dlen = cd(NULL, sk, e);
177 goto print_RSA_error;
180 if (cd(d, sk, e) != dlen) {
181 goto print_RSA_error;
190 pk.elen = sizeof ebuf;
192 if (os->rawder != NULL || os->rawpem != NULL) {
193 len = br_encode_rsa_raw_der(NULL, sk, &pk, d, dlen);
195 goto print_RSA_error;
198 if (br_encode_rsa_raw_der(buf, sk, &pk, d, dlen) != len) {
199 goto print_RSA_error;
201 if (os->rawder != NULL) {
202 ret &= write_to_file(os->rawder, buf, len);
204 if (os->rawpem != NULL) {
205 ret &= write_to_pem_file(os->rawpem,
206 buf, len, "RSA PRIVATE KEY");
212 if (os->pk8der != NULL || os->pk8pem != NULL) {
213 len = br_encode_rsa_pkcs8_der(NULL, sk, &pk, d, dlen);
215 goto print_RSA_error;
218 if (br_encode_rsa_pkcs8_der(buf, sk, &pk, d, dlen) != len) {
219 goto print_RSA_error;
221 if (os->pk8der != NULL) {
222 ret &= write_to_file(os->pk8der, buf, len);
224 if (os->pk8pem != NULL) {
225 ret &= write_to_pem_file(os->pk8pem,
226 buf, len, "PRIVATE KEY");
239 fprintf(stderr, "ERROR: cannot encode RSA key\n");
245 print_ec(const br_ec_private_key *sk, outspec *os)
248 unsigned kbuf[BR_EC_KBUF_PUB_MAX_SIZE];
253 if (os->print_text) {
254 print_int_text("x", sk->x, sk->xlen);
257 print_int_C("EC_X", sk->x, sk->xlen);
258 printf("\nstatic const br_ec_private_key EC = {\n");
259 printf("\t%d,\n", sk->curve);
260 printf("\t(unsigned char *)EC_X, sizeof EC_X\n");
264 if (os->rawder == NULL && os->rawpem == NULL
265 && os->pk8der == NULL && os->pk8pem == NULL)
269 if (br_ec_compute_pub(br_ec_get_default(), &pk, kbuf, sk) == 0) {
271 "ERROR: cannot re-encode (unsupported curve)\n");
276 if (os->rawder != NULL || os->rawpem != NULL) {
277 len = br_encode_ec_raw_der(NULL, sk, &pk);
279 fprintf(stderr, "ERROR: cannot re-encode"
280 " (unsupported curve)\n");
284 if (br_encode_ec_raw_der(buf, sk, &pk) != len) {
285 fprintf(stderr, "ERROR: re-encode failure\n");
289 if (os->rawder != NULL) {
290 r &= write_to_file(os->rawder, buf, len);
292 if (os->rawpem != NULL) {
293 r &= write_to_pem_file(os->rawpem,
294 buf, len, "EC PRIVATE KEY");
298 if (os->pk8der != NULL || os->pk8pem != NULL) {
299 len = br_encode_ec_pkcs8_der(NULL, sk, &pk);
301 fprintf(stderr, "ERROR: cannot re-encode"
302 " (unsupported curve)\n");
306 if (br_encode_ec_pkcs8_der(buf, sk, &pk) != len) {
307 fprintf(stderr, "ERROR: re-encode failure\n");
311 if (os->pk8der != NULL) {
312 r &= write_to_file(os->pk8der, buf, len);
314 if (os->pk8pem != NULL) {
315 r &= write_to_pem_file(os->pk8pem,
316 buf, len, "PRIVATE KEY");
324 parse_rsa_spec(const char *kgen_spec, unsigned *size, uint32_t *pubexp)
331 if (*p != 'r' && *p != 'R') {
335 if (*p != 's' && *p != 'S') {
339 if (*p != 'a' && *p != 'A') {
347 } else if (*p != ':') {
351 ul = strtoul(p, &end, 10);
352 if (ul < 512 || ul > 32768) {
360 } else if (*p != ':') {
364 ul = strtoul(p, &end, 10);
365 if ((ul & 1) == 0 || ul == 1 || ((ul >> 30) >> 2) != 0) {
376 keygen_rsa(unsigned size, uint32_t pubexp, outspec *os)
378 br_hmac_drbg_context rng;
379 br_prng_seeder seeder;
381 br_rsa_private_key sk;
382 unsigned char *kbuf_priv;
385 seeder = br_prng_seeder_system(NULL);
387 fprintf(stderr, "ERROR: no system source of randomness\n");
390 br_hmac_drbg_init(&rng, &br_sha256_vtable, NULL, 0);
391 if (!seeder(&rng.vtable)) {
392 fprintf(stderr, "ERROR: system source of randomness failed\n");
395 kbuf_priv = xmalloc(BR_RSA_KBUF_PRIV_SIZE(size));
396 kg = br_rsa_keygen_get_default();
397 r = kg(&rng.vtable, &sk, kbuf_priv, NULL, NULL, size, pubexp);
399 fprintf(stderr, "ERROR: RSA key pair generation failed\n");
401 r = print_rsa(&sk, os);
408 parse_ec_spec(const char *kgen_spec, int *curve)
414 if (*p != 'e' && *p != 'E') {
418 if (*p != 'c' && *p != 'C') {
423 *curve = BR_EC_secp256r1;
429 *curve = get_curve_by_name(p);
434 keygen_ec(int curve, outspec *os)
436 br_hmac_drbg_context rng;
437 br_prng_seeder seeder;
438 const br_ec_impl *impl;
439 br_ec_private_key sk;
440 unsigned char kbuf_priv[BR_EC_KBUF_PRIV_MAX_SIZE];
443 seeder = br_prng_seeder_system(NULL);
445 fprintf(stderr, "ERROR: no system source of randomness\n");
448 br_hmac_drbg_init(&rng, &br_sha256_vtable, NULL, 0);
449 if (!seeder(&rng.vtable)) {
450 fprintf(stderr, "ERROR: system source of randomness failed\n");
453 impl = br_ec_get_default();
454 len = br_ec_keygen(&rng.vtable, impl, &sk, kbuf_priv, curve);
456 fprintf(stderr, "ERROR: curve is not supported\n");
459 return print_ec(&sk, os);
463 decode_key(const unsigned char *buf, size_t len, outspec *os)
465 br_skey_decoder_context dc;
468 br_skey_decoder_init(&dc);
469 br_skey_decoder_push(&dc, buf, len);
470 err = br_skey_decoder_last_error(&dc);
472 const char *errname, *errmsg;
474 fprintf(stderr, "ERROR (decoding): err=%d\n", err);
475 errname = find_error_name(err, &errmsg);
476 if (errname != NULL) {
477 fprintf(stderr, " %s: %s\n", errname, errmsg);
479 fprintf(stderr, " (unknown)\n");
484 switch (br_skey_decoder_key_type(&dc)) {
485 const br_rsa_private_key *rk;
486 const br_ec_private_key *ek;
489 rk = br_skey_decoder_get_rsa(&dc);
490 printf("RSA key (%lu bits)\n", (unsigned long)rk->n_bitlen);
491 ret = print_rsa(rk, os);
495 ek = br_skey_decoder_get_ec(&dc);
496 printf("EC key (curve = %d: %s)\n",
497 ek->curve, ec_curve_name(ek->curve));
498 ret = print_ec(ek, os);
502 fprintf(stderr, "Unknown key type: %d\n",
503 br_skey_decoder_key_type(&dc));
515 "usage: brssl skey [ options ] file...\n");
519 " -q suppress verbose messages\n");
521 " -text print private key details (human-readable)\n");
523 " -C print private key details (C code)\n");
525 " -rawder file save private key in 'file' (raw format, DER)\n");
527 " -rawpem file save private key in 'file' (raw format, PEM)\n");
529 " -pk8der file save private key in 'file' (PKCS#8 format, DER)\n");
531 " -pk8pem file save private key in 'file' (PKCS#8 format, PEM)\n");
533 " -gen spec generate a new key using the provided key specification\n");
535 " -list list known elliptic curve names\n");
537 "Key specification begins with a key type, followed by optional parameters\n");
539 "that depend on the key type, separated by colon characters:\n");
541 " rsa[:size[:pubexep]] RSA key (defaults: size = 2048, pubexp = 3)\n");
543 " ec[:curvename] EC key (default curve: secp256r1)\n");
548 do_skey(int argc, char *argv[])
557 const char *kgen_spec;
571 for (i = 0; i < argc; i ++) {
580 if (eqstr(arg, "-v") || eqstr(arg, "-verbose")) {
582 } else if (eqstr(arg, "-q") || eqstr(arg, "-quiet")) {
584 } else if (eqstr(arg, "-text")) {
586 } else if (eqstr(arg, "-C")) {
588 } else if (eqstr(arg, "-rawder")) {
591 "ERROR: no argument for '-rawder'\n");
593 goto skey_exit_error;
595 if (os.rawder != NULL) {
597 "ERROR: multiple '-rawder' options\n");
599 goto skey_exit_error;
603 } else if (eqstr(arg, "-rawpem")) {
606 "ERROR: no argument for '-rawpem'\n");
608 goto skey_exit_error;
610 if (os.rawpem != NULL) {
612 "ERROR: multiple '-rawpem' options\n");
614 goto skey_exit_error;
618 } else if (eqstr(arg, "-pk8der")) {
621 "ERROR: no argument for '-pk8der'\n");
623 goto skey_exit_error;
625 if (os.pk8der != NULL) {
627 "ERROR: multiple '-pk8der' options\n");
629 goto skey_exit_error;
633 } else if (eqstr(arg, "-pk8pem")) {
636 "ERROR: no argument for '-pk8pem'\n");
638 goto skey_exit_error;
640 if (os.pk8pem != NULL) {
642 "ERROR: multiple '-pk8pem' options\n");
644 goto skey_exit_error;
648 } else if (eqstr(arg, "-gen")) {
651 "ERROR: no argument for '-gen'\n");
653 goto skey_exit_error;
655 if (kgen_spec != NULL) {
657 "ERROR: multiple '-gen' options\n");
659 goto skey_exit_error;
663 } else if (eqstr(arg, "-list")) {
667 fprintf(stderr, "ERROR: unknown option: '%s'\n", arg);
669 goto skey_exit_error;
672 if (kgen_spec != NULL) {
677 if (num_files != 0) {
679 "ERROR: key files provided while generating\n");
681 goto skey_exit_error;
684 if (parse_rsa_spec(kgen_spec, &rsa_size, &rsa_pubexp)) {
685 if (!keygen_rsa(rsa_size, rsa_pubexp, &os)) {
686 goto skey_exit_error;
688 } else if (parse_ec_spec(kgen_spec, &curve)) {
689 if (!keygen_ec(curve, &os)) {
690 goto skey_exit_error;
694 "ERROR: unknown key specification: '%s'\n",
697 goto skey_exit_error;
699 } else if (num_files == 0) {
700 fprintf(stderr, "ERROR: no private key provided\n");
702 goto skey_exit_error;
705 for (i = 0; i < argc; i ++) {
712 buf = read_file(fname, &len);
714 goto skey_exit_error;
716 if (looks_like_DER(buf, len)) {
718 fprintf(stderr, "File '%s': ASN.1/DER object\n",
721 if (!decode_key(buf, len, &os)) {
722 goto skey_exit_error;
728 fprintf(stderr, "File '%s': decoding as PEM\n",
731 pos = decode_pem(buf, len, &num);
733 goto skey_exit_error;
735 for (u = 0; pos[u].name; u ++) {
739 if (eqstr(name, "RSA PRIVATE KEY")
740 || eqstr(name, "EC PRIVATE KEY")
741 || eqstr(name, "PRIVATE KEY"))
743 if (!decode_key(pos[u].data,
744 pos[u].data_len, &os))
746 goto skey_exit_error;
756 for (u = 0; pos[u].name; u ++) {
757 free_pem_object_contents(&pos[u]);
767 * Release allocated structures.
774 for (u = 0; pos[u].name; u ++) {
775 free_pem_object_contents(&pos[u]);