1 /*
2 * keys.c handle private keys for use in DNSSEC
3 *
4 * This module should hide some of the openSSL complexities
5 * and give a general interface for private keys and hmac
6 * handling
7 *
8 * (c) NLnet Labs, 2004-2006
9 *
10 * See the file LICENSE for the license
11 */
12
13 #include <ldns/config.h>
14
15 #include <ldns/ldns.h>
16
17 #ifdef HAVE_SSL
18 #include <openssl/ui.h>
19 #include <openssl/ssl.h>
20 #include <openssl/rand.h>
21 #include <openssl/bn.h>
22 #include <openssl/rsa.h>
23 #ifdef USE_DSA
24 #include <openssl/dsa.h>
25 #endif
26 #ifndef OPENSSL_NO_ENGINE
27 #include <openssl/engine.h>
28 #endif
29 #endif /* HAVE_SSL */
30
31 ldns_lookup_table ldns_signing_algorithms[] = {
32 { LDNS_SIGN_RSAMD5, "RSAMD5" },
33 { LDNS_SIGN_RSASHA1, "RSASHA1" },
34 { LDNS_SIGN_RSASHA1_NSEC3, "RSASHA1-NSEC3-SHA1" },
35 #ifdef USE_SHA2
36 { LDNS_SIGN_RSASHA256, "RSASHA256" },
37 { LDNS_SIGN_RSASHA512, "RSASHA512" },
38 #endif
39 #ifdef USE_GOST
40 { LDNS_SIGN_ECC_GOST, "ECC-GOST" },
41 #endif
42 #ifdef USE_ECDSA
43 { LDNS_SIGN_ECDSAP256SHA256, "ECDSAP256SHA256" },
44 { LDNS_SIGN_ECDSAP384SHA384, "ECDSAP384SHA384" },
45 #endif
46 #ifdef USE_ED25519
47 { LDNS_SIGN_ED25519, "ED25519" },
48 #endif
49 #ifdef USE_ED448
50 { LDNS_SIGN_ED448, "ED448" },
51 #endif
52 #ifdef USE_DSA
53 { LDNS_SIGN_DSA, "DSA" },
54 { LDNS_SIGN_DSA_NSEC3, "DSA-NSEC3-SHA1" },
55 #endif
56 { LDNS_SIGN_HMACMD5, "hmac-md5.sig-alg.reg.int" },
57 { LDNS_SIGN_HMACSHA1, "hmac-sha1" },
58 { LDNS_SIGN_HMACSHA256, "hmac-sha256" },
59 { LDNS_SIGN_HMACSHA224, "hmac-sha224" },
60 { LDNS_SIGN_HMACSHA384, "hmac-sha384" },
61 { LDNS_SIGN_HMACSHA512, "hmac-sha512" },
62 { 0, NULL }
63 };
64
65 ldns_key_list *
ldns_key_list_new(void)66 ldns_key_list_new(void)
67 {
68 ldns_key_list *key_list = LDNS_MALLOC(ldns_key_list);
69 if (!key_list) {
70 return NULL;
71 } else {
72 key_list->_key_count = 0;
73 key_list->_keys = NULL;
74 return key_list;
75 }
76 }
77
78 ldns_key *
ldns_key_new(void)79 ldns_key_new(void)
80 {
81 ldns_key *newkey;
82
83 newkey = LDNS_MALLOC(ldns_key);
84 if (!newkey) {
85 return NULL;
86 } else {
87 /* some defaults - not sure whether to do this */
88 ldns_key_set_use(newkey, true);
89 ldns_key_set_flags(newkey, LDNS_KEY_ZONE_KEY);
90 ldns_key_set_origttl(newkey, 0);
91 ldns_key_set_keytag(newkey, 0);
92 ldns_key_set_inception(newkey, 0);
93 ldns_key_set_expiration(newkey, 0);
94 ldns_key_set_pubkey_owner(newkey, NULL);
95 #ifdef HAVE_SSL
96 ldns_key_set_evp_key(newkey, NULL);
97 #endif /* HAVE_SSL */
98 ldns_key_set_hmac_key(newkey, NULL);
99 ldns_key_set_external_key(newkey, NULL);
100 return newkey;
101 }
102 }
103
104 ldns_status
ldns_key_new_frm_fp(ldns_key ** k,FILE * fp)105 ldns_key_new_frm_fp(ldns_key **k, FILE *fp)
106 {
107 return ldns_key_new_frm_fp_l(k, fp, NULL);
108 }
109
110 #if defined(HAVE_SSL) && !defined(OPENSSL_NO_ENGINE)
111 ldns_status
ldns_key_new_frm_engine(ldns_key ** key,ENGINE * e,char * key_id,ldns_algorithm alg)112 ldns_key_new_frm_engine(ldns_key **key, ENGINE *e, char *key_id, ldns_algorithm alg)
113 {
114 ldns_key *k;
115
116 k = ldns_key_new();
117 if(!k) return LDNS_STATUS_MEM_ERR;
118 #ifndef S_SPLINT_S
119 k->_key.key = ENGINE_load_private_key(e, key_id, UI_OpenSSL(), NULL);
120 if(!k->_key.key) {
121 ldns_key_free(k);
122 return LDNS_STATUS_ERR;
123 }
124 ldns_key_set_algorithm(k, (ldns_signing_algorithm) alg);
125 if (!k->_key.key) {
126 ldns_key_free(k);
127 return LDNS_STATUS_ENGINE_KEY_NOT_LOADED;
128 }
129 #endif /* splint */
130 *key = k;
131 return LDNS_STATUS_OK;
132 }
133 #endif
134
135 #ifdef USE_GOST
136 /** store GOST engine reference loaded into OpenSSL library */
137 ENGINE* ldns_gost_engine = NULL;
138
139 int
ldns_key_EVP_load_gost_id(void)140 ldns_key_EVP_load_gost_id(void)
141 {
142 static int gost_id = 0;
143 const EVP_PKEY_ASN1_METHOD* meth;
144 ENGINE* e;
145
146 if(gost_id) return gost_id;
147
148 /* see if configuration loaded gost implementation from other engine*/
149 meth = EVP_PKEY_asn1_find_str(NULL, "gost2001", -1);
150 if(meth) {
151 EVP_PKEY_asn1_get0_info(&gost_id, NULL, NULL, NULL, NULL, meth);
152 return gost_id;
153 }
154
155 /* see if engine can be loaded already */
156 e = ENGINE_by_id("gost");
157 if(!e) {
158 /* load it ourself, in case statically linked */
159 ENGINE_load_builtin_engines();
160 ENGINE_load_dynamic();
161 e = ENGINE_by_id("gost");
162 }
163 if(!e) {
164 /* no gost engine in openssl */
165 return 0;
166 }
167 if(!ENGINE_set_default(e, ENGINE_METHOD_ALL)) {
168 ENGINE_finish(e);
169 ENGINE_free(e);
170 return 0;
171 }
172
173 meth = EVP_PKEY_asn1_find_str(&e, "gost2001", -1);
174 if(!meth) {
175 /* algo not found */
176 ENGINE_finish(e);
177 ENGINE_free(e);
178 return 0;
179 }
180 /* Note: do not ENGINE_finish and ENGINE_free the acquired engine
181 * on some platforms this frees up the meth and unloads gost stuff */
182 ldns_gost_engine = e;
183
184 EVP_PKEY_asn1_get0_info(&gost_id, NULL, NULL, NULL, NULL, meth);
185 return gost_id;
186 }
187
ldns_key_EVP_unload_gost(void)188 void ldns_key_EVP_unload_gost(void)
189 {
190 if(ldns_gost_engine) {
191 ENGINE_finish(ldns_gost_engine);
192 ENGINE_free(ldns_gost_engine);
193 ldns_gost_engine = NULL;
194 }
195 }
196
197 /** read GOST private key */
198 static EVP_PKEY*
ldns_key_new_frm_fp_gost_l(FILE * fp,int * line_nr)199 ldns_key_new_frm_fp_gost_l(FILE* fp, int* line_nr)
200 {
201 char token[16384];
202 const unsigned char* pp;
203 int gost_id;
204 EVP_PKEY* pkey;
205 ldns_rdf* b64rdf = NULL;
206
207 gost_id = ldns_key_EVP_load_gost_id();
208 if(!gost_id)
209 return NULL;
210
211 if (ldns_fget_keyword_data_l(fp, "GostAsn1", ": ", token, "\n",
212 sizeof(token), line_nr) == -1)
213 return NULL;
214 while(strlen(token) < 96) {
215 /* read more b64 from the file, b64 split on multiple lines */
216 if(ldns_fget_token_l(fp, token+strlen(token), "\n",
217 sizeof(token)-strlen(token), line_nr) == -1)
218 return NULL;
219 }
220 if(ldns_str2rdf_b64(&b64rdf, token) != LDNS_STATUS_OK)
221 return NULL;
222 pp = (unsigned char*)ldns_rdf_data(b64rdf);
223 pkey = d2i_PrivateKey(gost_id, NULL, &pp, (int)ldns_rdf_size(b64rdf));
224 ldns_rdf_deep_free(b64rdf);
225 return pkey;
226 }
227 #endif
228
229 #ifdef USE_ECDSA
230 /** calculate public key from private key */
231 static int
ldns_EC_KEY_calc_public(EC_KEY * ec)232 ldns_EC_KEY_calc_public(EC_KEY* ec)
233 {
234 EC_POINT* pub_key;
235 const EC_GROUP* group;
236 group = EC_KEY_get0_group(ec);
237 pub_key = EC_POINT_new(group);
238 if(!pub_key) return 0;
239 if(!EC_POINT_copy(pub_key, EC_GROUP_get0_generator(group))) {
240 EC_POINT_free(pub_key);
241 return 0;
242 }
243 if(!EC_POINT_mul(group, pub_key, EC_KEY_get0_private_key(ec),
244 NULL, NULL, NULL)) {
245 EC_POINT_free(pub_key);
246 return 0;
247 }
248 if(EC_KEY_set_public_key(ec, pub_key) == 0) {
249 EC_POINT_free(pub_key);
250 return 0;
251 }
252 EC_POINT_free(pub_key);
253 return 1;
254 }
255
256 /** read ECDSA private key */
257 static EVP_PKEY*
ldns_key_new_frm_fp_ecdsa_l(FILE * fp,ldns_algorithm alg,int * line_nr)258 ldns_key_new_frm_fp_ecdsa_l(FILE* fp, ldns_algorithm alg, int* line_nr)
259 {
260 char token[16384];
261 ldns_rdf* b64rdf = NULL;
262 unsigned char* pp;
263 BIGNUM* bn;
264 EVP_PKEY* evp_key;
265 EC_KEY* ec;
266 if (ldns_fget_keyword_data_l(fp, "PrivateKey", ": ", token, "\n",
267 sizeof(token), line_nr) == -1)
268 return NULL;
269 if(ldns_str2rdf_b64(&b64rdf, token) != LDNS_STATUS_OK)
270 return NULL;
271 pp = (unsigned char*)ldns_rdf_data(b64rdf);
272
273 if(alg == LDNS_ECDSAP256SHA256)
274 ec = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
275 else if(alg == LDNS_ECDSAP384SHA384)
276 ec = EC_KEY_new_by_curve_name(NID_secp384r1);
277 else ec = NULL;
278 if(!ec) {
279 ldns_rdf_deep_free(b64rdf);
280 return NULL;
281 }
282 bn = BN_bin2bn(pp, (int)ldns_rdf_size(b64rdf), NULL);
283 ldns_rdf_deep_free(b64rdf);
284 if(!bn) {
285 EC_KEY_free(ec);
286 return NULL;
287 }
288 EC_KEY_set_private_key(ec, bn);
289 BN_free(bn);
290 if(!ldns_EC_KEY_calc_public(ec)) {
291 EC_KEY_free(ec);
292 return NULL;
293 }
294
295 evp_key = EVP_PKEY_new();
296 if(!evp_key) {
297 EC_KEY_free(ec);
298 return NULL;
299 }
300 if (!EVP_PKEY_assign_EC_KEY(evp_key, ec)) {
301 EVP_PKEY_free(evp_key);
302 EC_KEY_free(ec);
303 return NULL;
304 }
305 return evp_key;
306 }
307 #endif
308
309 #ifdef USE_ED25519
310 /** turn private key buffer into EC_KEY structure */
311 static EVP_PKEY*
ldns_ed25519_priv_raw(uint8_t * pkey,int plen)312 ldns_ed25519_priv_raw(uint8_t* pkey, int plen)
313 {
314 const unsigned char* pp;
315 uint8_t buf[256];
316 int buflen = 0;
317 uint8_t pre[] = {0x30, 0x2e, 0x02, 0x01, 0x00, 0x30, 0x05, 0x06,
318 0x03, 0x2b, 0x65, 0x70, 0x04, 0x22, 0x04, 0x20};
319 int pre_len = 16;
320 /* ASN looks like this for ED25519 public key
321 * 302a300506032b6570032100 <32byteskey>
322 * for ED25519 private key
323 * 302e020100300506032b657004220420 <32bytes>
324 *
325 * for X25519 this was
326 * 30320201010420 <32byteskey>
327 * andparameters a00b06092b06010401da470f01
328 * (noparameters, preamble is 30250201010420).
329 * the key is reversed (little endian).
330 */
331 buflen = pre_len + plen;
332 if((size_t)buflen > sizeof(buf))
333 return NULL;
334 memmove(buf, pre, pre_len);
335 memmove(buf+pre_len, pkey, plen);
336 /* reverse the pkey into the buf - key is not reversed it seems */
337 /* for(i=0; i<plen; i++)
338 buf[pre_len+i] = pkey[plen-1-i]; */
339 pp = buf;
340 return d2i_PrivateKey(NID_ED25519, NULL, &pp, buflen);
341 }
342
343 /** read ED25519 private key */
344 static EVP_PKEY*
ldns_key_new_frm_fp_ed25519_l(FILE * fp,int * line_nr)345 ldns_key_new_frm_fp_ed25519_l(FILE* fp, int* line_nr)
346 {
347 char token[16384];
348 ldns_rdf* b64rdf = NULL;
349 EVP_PKEY* evp_key;
350 if (ldns_fget_keyword_data_l(fp, "PrivateKey", ": ", token, "\n",
351 sizeof(token), line_nr) == -1)
352 return NULL;
353 if(ldns_str2rdf_b64(&b64rdf, token) != LDNS_STATUS_OK)
354 return NULL;
355
356 /* we use d2i_ECPrivateKey because it calculates the public key
357 * from the private part, which others, EC_KEY_set_private_key,
358 * and o2i methods, do not do */
359 /* for that the private key has to be encoded in ASN1 notation
360 * with a ED25519 prefix on it */
361
362 evp_key = ldns_ed25519_priv_raw(ldns_rdf_data(b64rdf),
363 (int)ldns_rdf_size(b64rdf));
364 ldns_rdf_deep_free(b64rdf);
365 return evp_key;
366 }
367 #endif
368
369 #ifdef USE_ED448
370 /** turn private key buffer into EC_KEY structure */
371 static EVP_PKEY*
ldns_ed448_priv_raw(uint8_t * pkey,int plen)372 ldns_ed448_priv_raw(uint8_t* pkey, int plen)
373 {
374 const unsigned char* pp;
375 uint8_t buf[256];
376 int buflen = 0;
377 uint8_t pre[] = {0x30, 0x47, 0x02, 0x01, 0x00, 0x30, 0x05, 0x06, 0x03, 0x2b, 0x65, 0x71, 0x04, 0x3b, 0x04, 0x39};
378 int pre_len = 16;
379 /* ASN looks like this for ED448
380 * 3047020100300506032b6571043b0439 <57bytekey>
381 * the key is reversed (little endian).
382 */
383 buflen = pre_len + plen;
384 if((size_t)buflen > sizeof(buf))
385 return NULL;
386 memmove(buf, pre, pre_len);
387 memmove(buf+pre_len, pkey, plen);
388 /* reverse the pkey into the buf - key is not reversed it seems */
389 /* for(i=0; i<plen; i++)
390 buf[pre_len+i] = pkey[plen-1-i]; */
391 pp = buf;
392 return d2i_PrivateKey(NID_ED448, NULL, &pp, buflen);
393 }
394
395 /** read ED448 private key */
396 static EVP_PKEY*
ldns_key_new_frm_fp_ed448_l(FILE * fp,int * line_nr)397 ldns_key_new_frm_fp_ed448_l(FILE* fp, int* line_nr)
398 {
399 char token[16384];
400 ldns_rdf* b64rdf = NULL;
401 EVP_PKEY* evp_key;
402 if (ldns_fget_keyword_data_l(fp, "PrivateKey", ": ", token, "\n",
403 sizeof(token), line_nr) == -1)
404 return NULL;
405 if(ldns_str2rdf_b64(&b64rdf, token) != LDNS_STATUS_OK)
406 return NULL;
407
408 /* convert private key into ASN notation and then convert that */
409 evp_key = ldns_ed448_priv_raw(ldns_rdf_data(b64rdf),
410 (int)ldns_rdf_size(b64rdf));
411 ldns_rdf_deep_free(b64rdf);
412 return evp_key;
413 }
414 #endif
415
416 ldns_status
ldns_key_new_frm_fp_l(ldns_key ** key,FILE * fp,int * line_nr)417 ldns_key_new_frm_fp_l(ldns_key **key, FILE *fp, int *line_nr)
418 {
419 ldns_key *k;
420 char *d;
421 ldns_signing_algorithm alg;
422 ldns_rr *key_rr;
423 #ifdef HAVE_SSL
424 RSA *rsa;
425 #ifdef USE_DSA
426 DSA *dsa;
427 #endif
428 unsigned char *hmac;
429 size_t hmac_size;
430 #endif /* HAVE_SSL */
431
432 k = ldns_key_new();
433
434 d = LDNS_XMALLOC(char, LDNS_MAX_LINELEN);
435 if (!k || !d) {
436 ldns_key_free(k);
437 LDNS_FREE(d);
438 return LDNS_STATUS_MEM_ERR;
439 }
440
441 alg = 0;
442
443 /* the file is highly structured. Do this in sequence */
444 /* RSA:
445 * Private-key-format: v1.x.
446 * Algorithm: 1 (RSA)
447
448 */
449 /* get the key format version number */
450 if (ldns_fget_keyword_data_l(fp, "Private-key-format", ": ", d, "\n",
451 LDNS_MAX_LINELEN, line_nr) == -1) {
452 /* no version information */
453 ldns_key_free(k);
454 LDNS_FREE(d);
455 return LDNS_STATUS_SYNTAX_ERR;
456 }
457 if (strncmp(d, "v1.", 3) != 0) {
458 ldns_key_free(k);
459 LDNS_FREE(d);
460 return LDNS_STATUS_SYNTAX_VERSION_ERR;
461 }
462
463 /* get the algorithm type, our file function strip ( ) so there are
464 * not in the return string! */
465 if (ldns_fget_keyword_data_l(fp, "Algorithm", ": ", d, "\n",
466 LDNS_MAX_LINELEN, line_nr) == -1) {
467 /* no alg information */
468 ldns_key_free(k);
469 LDNS_FREE(d);
470 return LDNS_STATUS_SYNTAX_ALG_ERR;
471 }
472
473 if (strncmp(d, "1 RSA", 2) == 0) {
474 alg = LDNS_SIGN_RSAMD5;
475 }
476 if (strncmp(d, "2 DH", 2) == 0) {
477 alg = (ldns_signing_algorithm)LDNS_DH;
478 }
479 if (strncmp(d, "3 DSA", 2) == 0) {
480 #ifdef USE_DSA
481 alg = LDNS_SIGN_DSA;
482 #else
483 # ifdef STDERR_MSGS
484 fprintf(stderr, "Warning: DSA not compiled into this ");
485 fprintf(stderr, "version of ldns\n");
486 # endif
487 #endif
488 }
489 if (strncmp(d, "4 ECC", 2) == 0) {
490 alg = (ldns_signing_algorithm)LDNS_ECC;
491 }
492 if (strncmp(d, "5 RSASHA1", 2) == 0) {
493 alg = LDNS_SIGN_RSASHA1;
494 }
495 if (strncmp(d, "6 DSA", 2) == 0) {
496 #ifdef USE_DSA
497 alg = LDNS_SIGN_DSA_NSEC3;
498 #else
499 # ifdef STDERR_MSGS
500 fprintf(stderr, "Warning: DSA not compiled into this ");
501 fprintf(stderr, "version of ldns\n");
502 # endif
503 #endif
504 }
505 if (strncmp(d, "7 RSASHA1", 2) == 0) {
506 alg = LDNS_SIGN_RSASHA1_NSEC3;
507 }
508
509 if (strncmp(d, "8 RSASHA256", 2) == 0) {
510 #ifdef USE_SHA2
511 alg = LDNS_SIGN_RSASHA256;
512 #else
513 # ifdef STDERR_MSGS
514 fprintf(stderr, "Warning: SHA256 not compiled into this ");
515 fprintf(stderr, "version of ldns\n");
516 # endif
517 #endif
518 }
519 if (strncmp(d, "10 RSASHA512", 3) == 0) {
520 #ifdef USE_SHA2
521 alg = LDNS_SIGN_RSASHA512;
522 #else
523 # ifdef STDERR_MSGS
524 fprintf(stderr, "Warning: SHA512 not compiled into this ");
525 fprintf(stderr, "version of ldns\n");
526 # endif
527 #endif
528 }
529 if (strncmp(d, "12 ECC-GOST", 3) == 0) {
530 #ifdef USE_GOST
531 alg = LDNS_SIGN_ECC_GOST;
532 #else
533 # ifdef STDERR_MSGS
534 fprintf(stderr, "Warning: ECC-GOST not compiled into this ");
535 fprintf(stderr, "version of ldns, use --enable-gost\n");
536 # endif
537 #endif
538 }
539 if (strncmp(d, "13 ECDSAP256SHA256", 3) == 0) {
540 #ifdef USE_ECDSA
541 alg = LDNS_SIGN_ECDSAP256SHA256;
542 #else
543 # ifdef STDERR_MSGS
544 fprintf(stderr, "Warning: ECDSA not compiled into this ");
545 fprintf(stderr, "version of ldns, use --enable-ecdsa\n");
546 # endif
547 #endif
548 }
549 if (strncmp(d, "14 ECDSAP384SHA384", 3) == 0) {
550 #ifdef USE_ECDSA
551 alg = LDNS_SIGN_ECDSAP384SHA384;
552 #else
553 # ifdef STDERR_MSGS
554 fprintf(stderr, "Warning: ECDSA not compiled into this ");
555 fprintf(stderr, "version of ldns, use --enable-ecdsa\n");
556 # endif
557 #endif
558 }
559 if (strncmp(d, "15 ED25519", 3) == 0) {
560 #ifdef USE_ED25519
561 alg = LDNS_SIGN_ED25519;
562 #else
563 # ifdef STDERR_MSGS
564 fprintf(stderr, "Warning: ED25519 not compiled into this ");
565 fprintf(stderr, "version of ldns, use --enable-ed25519\n");
566 # endif
567 #endif
568 }
569 if (strncmp(d, "16 ED448", 3) == 0) {
570 #ifdef USE_ED448
571 alg = LDNS_SIGN_ED448;
572 #else
573 # ifdef STDERR_MSGS
574 fprintf(stderr, "Warning: ED448 not compiled into this ");
575 fprintf(stderr, "version of ldns, use --enable-ed448\n");
576 # endif
577 #endif
578 }
579 if (strncmp(d, "157 HMAC-MD5", 4) == 0) {
580 alg = LDNS_SIGN_HMACMD5;
581 }
582 if (strncmp(d, "158 HMAC-SHA1", 4) == 0) {
583 alg = LDNS_SIGN_HMACSHA1;
584 }
585 if (strncmp(d, "159 HMAC-SHA256", 4) == 0) {
586 alg = LDNS_SIGN_HMACSHA256;
587 }
588 /* For compatibility with dnssec-keygen */
589 if (strncmp(d, "161 ", 4) == 0) {
590 alg = LDNS_SIGN_HMACSHA1;
591 }
592 if (strncmp(d, "162 HMAC-SHA224", 4) == 0) {
593 alg = LDNS_SIGN_HMACSHA224;
594 }
595 /* For compatibility with dnssec-keygen */
596 if (strncmp(d, "163 ", 4) == 0) {
597 alg = LDNS_SIGN_HMACSHA256;
598 }
599 if (strncmp(d, "164 HMAC-SHA384", 4) == 0) {
600 alg = LDNS_SIGN_HMACSHA384;
601 }
602 if (strncmp(d, "165 HMAC-SHA512", 4) == 0) {
603 alg = LDNS_SIGN_HMACSHA512;
604 }
605 LDNS_FREE(d);
606
607 switch(alg) {
608 case LDNS_SIGN_RSAMD5:
609 case LDNS_SIGN_RSASHA1:
610 case LDNS_SIGN_RSASHA1_NSEC3:
611 #ifdef USE_SHA2
612 case LDNS_SIGN_RSASHA256:
613 case LDNS_SIGN_RSASHA512:
614 #endif
615 ldns_key_set_algorithm(k, alg);
616 #ifdef HAVE_SSL
617 rsa = ldns_key_new_frm_fp_rsa_l(fp, line_nr);
618 if (!rsa) {
619 ldns_key_free(k);
620 return LDNS_STATUS_ERR;
621 }
622 ldns_key_assign_rsa_key(k, rsa);
623 #endif /* HAVE_SSL */
624 break;
625 #ifdef USE_DSA
626 case LDNS_SIGN_DSA:
627 case LDNS_SIGN_DSA_NSEC3:
628 ldns_key_set_algorithm(k, alg);
629 #ifdef HAVE_SSL
630 dsa = ldns_key_new_frm_fp_dsa_l(fp, line_nr);
631 if (!dsa) {
632 ldns_key_free(k);
633 return LDNS_STATUS_ERR;
634 }
635 ldns_key_assign_dsa_key(k, dsa);
636 #endif /* HAVE_SSL */
637 break;
638 #endif /* USE_DSA */
639 case LDNS_SIGN_HMACMD5:
640 case LDNS_SIGN_HMACSHA1:
641 case LDNS_SIGN_HMACSHA224:
642 case LDNS_SIGN_HMACSHA256:
643 case LDNS_SIGN_HMACSHA384:
644 case LDNS_SIGN_HMACSHA512:
645 ldns_key_set_algorithm(k, alg);
646 #ifdef HAVE_SSL
647 hmac = ldns_key_new_frm_fp_hmac_l(fp, line_nr, &hmac_size);
648 if (!hmac) {
649 ldns_key_free(k);
650 return LDNS_STATUS_ERR;
651 }
652 ldns_key_set_hmac_size(k, hmac_size);
653 ldns_key_set_hmac_key(k, hmac);
654 #endif /* HAVE_SSL */
655 break;
656 case LDNS_SIGN_ECC_GOST:
657 ldns_key_set_algorithm(k, alg);
658 #if defined(HAVE_SSL) && defined(USE_GOST)
659 if(!ldns_key_EVP_load_gost_id()) {
660 ldns_key_free(k);
661 return LDNS_STATUS_CRYPTO_ALGO_NOT_IMPL;
662 }
663 ldns_key_set_evp_key(k,
664 ldns_key_new_frm_fp_gost_l(fp, line_nr));
665 #ifndef S_SPLINT_S
666 if(!k->_key.key) {
667 ldns_key_free(k);
668 return LDNS_STATUS_ERR;
669 }
670 #endif /* splint */
671 #endif
672 break;
673 #ifdef USE_ECDSA
674 case LDNS_SIGN_ECDSAP256SHA256:
675 case LDNS_SIGN_ECDSAP384SHA384:
676 ldns_key_set_algorithm(k, alg);
677 ldns_key_set_evp_key(k,
678 ldns_key_new_frm_fp_ecdsa_l(fp, (ldns_algorithm)alg, line_nr));
679 #ifndef S_SPLINT_S
680 if(!k->_key.key) {
681 ldns_key_free(k);
682 return LDNS_STATUS_ERR;
683 }
684 #endif /* splint */
685 break;
686 #endif
687 #ifdef USE_ED25519
688 case LDNS_SIGN_ED25519:
689 ldns_key_set_algorithm(k, alg);
690 ldns_key_set_evp_key(k,
691 ldns_key_new_frm_fp_ed25519_l(fp, line_nr));
692 #ifndef S_SPLINT_S
693 if(!k->_key.key) {
694 ldns_key_free(k);
695 return LDNS_STATUS_ERR;
696 }
697 #endif /* splint */
698 break;
699 #endif
700 #ifdef USE_ED448
701 case LDNS_SIGN_ED448:
702 ldns_key_set_algorithm(k, alg);
703 ldns_key_set_evp_key(k,
704 ldns_key_new_frm_fp_ed448_l(fp, line_nr));
705 #ifndef S_SPLINT_S
706 if(!k->_key.key) {
707 ldns_key_free(k);
708 return LDNS_STATUS_ERR;
709 }
710 #endif /* splint */
711 break;
712 #endif
713 default:
714 ldns_key_free(k);
715 return LDNS_STATUS_SYNTAX_ALG_ERR;
716 }
717 key_rr = ldns_key2rr(k);
718 ldns_key_set_keytag(k, ldns_calc_keytag(key_rr));
719 ldns_rr_free(key_rr);
720
721 if (key) {
722 *key = k;
723 return LDNS_STATUS_OK;
724 }
725 ldns_key_free(k);
726 return LDNS_STATUS_ERR;
727 }
728
729 #ifdef HAVE_SSL
730 RSA *
ldns_key_new_frm_fp_rsa(FILE * f)731 ldns_key_new_frm_fp_rsa(FILE *f)
732 {
733 return ldns_key_new_frm_fp_rsa_l(f, NULL);
734 }
735
736 RSA *
ldns_key_new_frm_fp_rsa_l(FILE * f,int * line_nr)737 ldns_key_new_frm_fp_rsa_l(FILE *f, int *line_nr)
738 {
739 /* we parse
740 * Modulus:
741 * PublicExponent:
742 * PrivateExponent:
743 * Prime1:
744 * Prime2:
745 * Exponent1:
746 * Exponent2:
747 * Coefficient:
748 *
749 * man 3 RSA:
750 *
751 * struct
752 * {
753 * BIGNUM *n; // public modulus
754 * BIGNUM *e; // public exponent
755 * BIGNUM *d; // private exponent
756 * BIGNUM *p; // secret prime factor
757 * BIGNUM *q; // secret prime factor
758 * BIGNUM *dmp1; // d mod (p-1)
759 * BIGNUM *dmq1; // d mod (q-1)
760 * BIGNUM *iqmp; // q^-1 mod p
761 * // ...
762 *
763 */
764 char *b;
765 RSA *rsa;
766 uint8_t *buf;
767 int i;
768 BIGNUM *n=NULL, *e=NULL, *d=NULL, *p=NULL, *q=NULL,
769 *dmp1=NULL, *dmq1=NULL, *iqmp=NULL;
770
771 b = LDNS_XMALLOC(char, LDNS_MAX_LINELEN);
772 buf = LDNS_XMALLOC(uint8_t, LDNS_MAX_LINELEN);
773 rsa = RSA_new();
774 if (!b || !rsa || !buf) {
775 goto error;
776 }
777
778 /* I could use functions again, but that seems an overkill,
779 * although this also looks tedious
780 */
781
782 /* Modules, rsa->n */
783 if (ldns_fget_keyword_data_l(f, "Modulus", ": ", b, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
784 goto error;
785 }
786 i = ldns_b64_pton((const char*)b, buf, ldns_b64_ntop_calculate_size(strlen(b)));
787 #ifndef S_SPLINT_S
788 n = BN_bin2bn((const char unsigned*)buf, i, NULL);
789 if (!n) {
790 goto error;
791 }
792
793 /* PublicExponent, rsa->e */
794 if (ldns_fget_keyword_data_l(f, "PublicExponent", ": ", b, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
795 goto error;
796 }
797 i = ldns_b64_pton((const char*)b, buf, ldns_b64_ntop_calculate_size(strlen(b)));
798 e = BN_bin2bn((const char unsigned*)buf, i, NULL);
799 if (!e) {
800 goto error;
801 }
802
803 /* PrivateExponent, rsa->d */
804 if (ldns_fget_keyword_data_l(f, "PrivateExponent", ": ", b, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
805 goto error;
806 }
807 i = ldns_b64_pton((const char*)b, buf, ldns_b64_ntop_calculate_size(strlen(b)));
808 d = BN_bin2bn((const char unsigned*)buf, i, NULL);
809 if (!d) {
810 goto error;
811 }
812
813 /* Prime1, rsa->p */
814 if (ldns_fget_keyword_data_l(f, "Prime1", ": ", b, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
815 goto error;
816 }
817 i = ldns_b64_pton((const char*)b, buf, ldns_b64_ntop_calculate_size(strlen(b)));
818 p = BN_bin2bn((const char unsigned*)buf, i, NULL);
819 if (!p) {
820 goto error;
821 }
822
823 /* Prime2, rsa->q */
824 if (ldns_fget_keyword_data_l(f, "Prime2", ": ", b, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
825 goto error;
826 }
827 i = ldns_b64_pton((const char*)b, buf, ldns_b64_ntop_calculate_size(strlen(b)));
828 q = BN_bin2bn((const char unsigned*)buf, i, NULL);
829 if (!q) {
830 goto error;
831 }
832
833 /* Exponent1, rsa->dmp1 */
834 if (ldns_fget_keyword_data_l(f, "Exponent1", ": ", b, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
835 goto error;
836 }
837 i = ldns_b64_pton((const char*)b, buf, ldns_b64_ntop_calculate_size(strlen(b)));
838 dmp1 = BN_bin2bn((const char unsigned*)buf, i, NULL);
839 if (!dmp1) {
840 goto error;
841 }
842
843 /* Exponent2, rsa->dmq1 */
844 if (ldns_fget_keyword_data_l(f, "Exponent2", ": ", b, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
845 goto error;
846 }
847 i = ldns_b64_pton((const char*)b, buf, ldns_b64_ntop_calculate_size(strlen(b)));
848 dmq1 = BN_bin2bn((const char unsigned*)buf, i, NULL);
849 if (!dmq1) {
850 goto error;
851 }
852
853 /* Coefficient, rsa->iqmp */
854 if (ldns_fget_keyword_data_l(f, "Coefficient", ": ", b, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
855 goto error;
856 }
857 i = ldns_b64_pton((const char*)b, buf, ldns_b64_ntop_calculate_size(strlen(b)));
858 iqmp = BN_bin2bn((const char unsigned*)buf, i, NULL);
859 if (!iqmp) {
860 goto error;
861 }
862 #endif /* splint */
863
864 #if OPENSSL_VERSION_NUMBER < 0x10100000 || (defined(HAVE_LIBRESSL) && LIBRESSL_VERSION_NUMBER < 0x20700000)
865 # ifndef S_SPLINT_S
866 rsa->n = n;
867 rsa->e = e;
868 rsa->d = d;
869 rsa->p = p;
870 rsa->q = q;
871 rsa->dmp1 = dmp1;
872 rsa->dmq1 = dmq1;
873 rsa->iqmp = iqmp;
874 # endif
875 #else
876 if(!RSA_set0_key(rsa, n, e, d))
877 goto error;
878 n = NULL;
879 e = NULL;
880 d = NULL;
881 if(!RSA_set0_factors(rsa, p, q))
882 goto error;
883 p = NULL;
884 q = NULL;
885 if(!RSA_set0_crt_params(rsa, dmp1, dmq1, iqmp))
886 goto error;
887 #endif
888
889 LDNS_FREE(buf);
890 LDNS_FREE(b);
891 return rsa;
892
893 error:
894 RSA_free(rsa);
895 LDNS_FREE(b);
896 LDNS_FREE(buf);
897 BN_free(n);
898 BN_free(e);
899 BN_free(d);
900 BN_free(p);
901 BN_free(q);
902 BN_free(dmp1);
903 BN_free(dmq1);
904 BN_free(iqmp);
905 return NULL;
906 }
907
908 #ifdef USE_DSA
909 DSA *
ldns_key_new_frm_fp_dsa(FILE * f)910 ldns_key_new_frm_fp_dsa(FILE *f)
911 {
912 return ldns_key_new_frm_fp_dsa_l(f, NULL);
913 }
914
915 DSA *
ldns_key_new_frm_fp_dsa_l(FILE * f,ATTR_UNUSED (int * line_nr))916 ldns_key_new_frm_fp_dsa_l(FILE *f, ATTR_UNUSED(int *line_nr))
917 {
918 int i;
919 char *d;
920 DSA *dsa;
921 uint8_t *buf;
922 BIGNUM *p=NULL, *q=NULL, *g=NULL, *priv_key=NULL, *pub_key=NULL;
923
924 d = LDNS_XMALLOC(char, LDNS_MAX_LINELEN);
925 buf = LDNS_XMALLOC(uint8_t, LDNS_MAX_LINELEN);
926 dsa = DSA_new();
927 if (!d || !dsa || !buf) {
928 goto error;
929 }
930
931 /* the line parser removes the () from the input... */
932
933 /* Prime, dsa->p */
934 if (ldns_fget_keyword_data_l(f, "Primep", ": ", d, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
935 goto error;
936 }
937 i = ldns_b64_pton((const char*)d, buf, ldns_b64_ntop_calculate_size(strlen(d)));
938 #ifndef S_SPLINT_S
939 p = BN_bin2bn((const char unsigned*)buf, i, NULL);
940 if (!p) {
941 goto error;
942 }
943
944 /* Subprime, dsa->q */
945 if (ldns_fget_keyword_data_l(f, "Subprimeq", ": ", d, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
946 goto error;
947 }
948 i = ldns_b64_pton((const char*)d, buf, ldns_b64_ntop_calculate_size(strlen(d)));
949 q = BN_bin2bn((const char unsigned*)buf, i, NULL);
950 if (!q) {
951 goto error;
952 }
953
954 /* Base, dsa->g */
955 if (ldns_fget_keyword_data_l(f, "Baseg", ": ", d, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
956 goto error;
957 }
958 i = ldns_b64_pton((const char*)d, buf, ldns_b64_ntop_calculate_size(strlen(d)));
959 g = BN_bin2bn((const char unsigned*)buf, i, NULL);
960 if (!g) {
961 goto error;
962 }
963
964 /* Private key, dsa->priv_key */
965 if (ldns_fget_keyword_data_l(f, "Private_valuex", ": ", d, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
966 goto error;
967 }
968 i = ldns_b64_pton((const char*)d, buf, ldns_b64_ntop_calculate_size(strlen(d)));
969 priv_key = BN_bin2bn((const char unsigned*)buf, i, NULL);
970 if (!priv_key) {
971 goto error;
972 }
973
974 /* Public key, dsa->priv_key */
975 if (ldns_fget_keyword_data_l(f, "Public_valuey", ": ", d, "\n", LDNS_MAX_LINELEN, line_nr) == -1) {
976 goto error;
977 }
978 i = ldns_b64_pton((const char*)d, buf, ldns_b64_ntop_calculate_size(strlen(d)));
979 pub_key = BN_bin2bn((const char unsigned*)buf, i, NULL);
980 if (!pub_key) {
981 goto error;
982 }
983 #endif /* splint */
984
985 #if OPENSSL_VERSION_NUMBER < 0x10100000 || (defined(HAVE_LIBRESSL) && LIBRESSL_VERSION_NUMBER < 0x20700000)
986 # ifndef S_SPLINT_S
987 dsa->p = p;
988 dsa->q = q;
989 dsa->g = g;
990 dsa->priv_key = priv_key;
991 dsa->pub_key = pub_key;
992 # endif
993 #else
994 if(!DSA_set0_pqg(dsa, p, q, g))
995 goto error;
996 p = NULL;
997 q = NULL;
998 g = NULL;
999 if(!DSA_set0_key(dsa, pub_key, priv_key))
1000 goto error;
1001 #endif
1002
1003 LDNS_FREE(buf);
1004 LDNS_FREE(d);
1005
1006 return dsa;
1007
1008 error:
1009 LDNS_FREE(d);
1010 LDNS_FREE(buf);
1011 DSA_free(dsa);
1012 BN_free(p);
1013 BN_free(q);
1014 BN_free(g);
1015 BN_free(priv_key);
1016 BN_free(pub_key);
1017 return NULL;
1018 }
1019 #endif /* USE_DSA */
1020
1021 unsigned char *
ldns_key_new_frm_fp_hmac(FILE * f,size_t * hmac_size)1022 ldns_key_new_frm_fp_hmac(FILE *f, size_t *hmac_size)
1023 {
1024 return ldns_key_new_frm_fp_hmac_l(f, NULL, hmac_size);
1025 }
1026
1027 unsigned char *
ldns_key_new_frm_fp_hmac_l(FILE * f,ATTR_UNUSED (int * line_nr),size_t * hmac_size)1028 ldns_key_new_frm_fp_hmac_l( FILE *f
1029 , ATTR_UNUSED(int *line_nr)
1030 , size_t *hmac_size
1031 )
1032 {
1033 size_t bufsz;
1034 char d[LDNS_MAX_LINELEN];
1035 unsigned char *buf = NULL;
1036
1037 *hmac_size = ldns_fget_keyword_data_l(f, "Key", ": ", d, "\n",
1038 LDNS_MAX_LINELEN, line_nr) == -1
1039 ? 0
1040 : (buf = LDNS_XMALLOC( unsigned char, (bufsz =
1041 ldns_b64_ntop_calculate_size(strlen(d))))) == NULL
1042 ? 0
1043 : (size_t) ldns_b64_pton((const char*)d, buf, bufsz);
1044 return buf;
1045 }
1046 #endif /* HAVE_SSL */
1047
1048 #ifdef USE_GOST
1049 static EVP_PKEY*
ldns_gen_gost_key(void)1050 ldns_gen_gost_key(void)
1051 {
1052 EVP_PKEY_CTX* ctx;
1053 EVP_PKEY* p = NULL;
1054 int gost_id = ldns_key_EVP_load_gost_id();
1055 if(!gost_id)
1056 return NULL;
1057 ctx = EVP_PKEY_CTX_new_id(gost_id, NULL);
1058 if(!ctx) {
1059 /* the id should be available now */
1060 return NULL;
1061 }
1062 if(EVP_PKEY_CTX_ctrl_str(ctx, "paramset", "A") <= 0) {
1063 /* cannot set paramset */
1064 EVP_PKEY_CTX_free(ctx);
1065 return NULL;
1066 }
1067
1068 if(EVP_PKEY_keygen_init(ctx) <= 0) {
1069 EVP_PKEY_CTX_free(ctx);
1070 return NULL;
1071 }
1072 if(EVP_PKEY_keygen(ctx, &p) <= 0) {
1073 EVP_PKEY_free(p);
1074 EVP_PKEY_CTX_free(ctx);
1075 return NULL;
1076 }
1077 EVP_PKEY_CTX_free(ctx);
1078 return p;
1079 }
1080 #endif
1081
1082 ldns_key *
ldns_key_new_frm_algorithm(ldns_signing_algorithm alg,uint16_t size)1083 ldns_key_new_frm_algorithm(ldns_signing_algorithm alg, uint16_t size)
1084 {
1085 ldns_key *k;
1086 #ifdef HAVE_SSL
1087 #ifdef USE_DSA
1088 DSA *d;
1089 #endif /* USE_DSA */
1090 # ifdef USE_ECDSA
1091 EC_KEY *ec = NULL;
1092 # endif
1093 # ifdef HAVE_EVP_PKEY_KEYGEN
1094 EVP_PKEY_CTX *ctx;
1095 # else
1096 RSA *r;
1097 # endif
1098 #else
1099 int i;
1100 uint16_t offset = 0;
1101 #endif
1102 unsigned char *hmac;
1103
1104 k = ldns_key_new();
1105 if (!k) {
1106 return NULL;
1107 }
1108 switch(alg) {
1109 case LDNS_SIGN_RSAMD5:
1110 case LDNS_SIGN_RSASHA1:
1111 case LDNS_SIGN_RSASHA1_NSEC3:
1112 case LDNS_SIGN_RSASHA256:
1113 case LDNS_SIGN_RSASHA512:
1114 #ifdef HAVE_SSL
1115 #ifdef HAVE_EVP_PKEY_KEYGEN
1116 ctx = EVP_PKEY_CTX_new_id(EVP_PKEY_RSA, NULL);
1117 if(!ctx) {
1118 ldns_key_free(k);
1119 return NULL;
1120 }
1121 if(EVP_PKEY_keygen_init(ctx) <= 0) {
1122 ldns_key_free(k);
1123 EVP_PKEY_CTX_free(ctx);
1124 return NULL;
1125 }
1126 if (EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, size) <= 0) {
1127 ldns_key_free(k);
1128 EVP_PKEY_CTX_free(ctx);
1129 return NULL;
1130 }
1131 #ifndef S_SPLINT_S
1132 if (EVP_PKEY_keygen(ctx, &k->_key.key) <= 0) {
1133 ldns_key_free(k);
1134 EVP_PKEY_CTX_free(ctx);
1135 return NULL;
1136 }
1137 #endif
1138 EVP_PKEY_CTX_free(ctx);
1139 #else /* HAVE_EVP_PKEY_KEYGEN */
1140 r = RSA_generate_key((int)size, RSA_F4, NULL, NULL);
1141 if(!r) {
1142 ldns_key_free(k);
1143 return NULL;
1144 }
1145 if (RSA_check_key(r) != 1) {
1146 ldns_key_free(k);
1147 return NULL;
1148 }
1149 ldns_key_set_rsa_key(k, r);
1150 RSA_free(r);
1151 #endif /* HAVE_EVP_PKEY_KEYGEN */
1152 #endif /* HAVE_SSL */
1153 break;
1154 #ifdef USE_DSA
1155 case LDNS_SIGN_DSA:
1156 case LDNS_SIGN_DSA_NSEC3:
1157 #ifdef HAVE_SSL
1158 # if OPENSSL_VERSION_NUMBER < 0x00908000L
1159 d = DSA_generate_parameters((int)size, NULL, 0, NULL, NULL, NULL, NULL);
1160 if (!d) {
1161 ldns_key_free(k);
1162 return NULL;
1163 }
1164
1165 # else
1166 if (! (d = DSA_new())) {
1167 ldns_key_free(k);
1168 return NULL;
1169 }
1170 if (! DSA_generate_parameters_ex(d, (int)size, NULL, 0, NULL, NULL, NULL)) {
1171 DSA_free(d);
1172 ldns_key_free(k);
1173 return NULL;
1174 }
1175 # endif
1176 if (DSA_generate_key(d) != 1) {
1177 ldns_key_free(k);
1178 return NULL;
1179 }
1180 ldns_key_set_dsa_key(k, d);
1181 DSA_free(d);
1182 #endif /* HAVE_SSL */
1183 #endif /* USE_DSA */
1184 break;
1185 case LDNS_SIGN_HMACMD5:
1186 case LDNS_SIGN_HMACSHA1:
1187 case LDNS_SIGN_HMACSHA224:
1188 case LDNS_SIGN_HMACSHA256:
1189 case LDNS_SIGN_HMACSHA384:
1190 case LDNS_SIGN_HMACSHA512:
1191 #ifdef HAVE_SSL
1192 #ifndef S_SPLINT_S
1193 k->_key.key = NULL;
1194 #endif /* splint */
1195 #endif /* HAVE_SSL */
1196 size = size / 8;
1197 ldns_key_set_hmac_size(k, size);
1198
1199 hmac = LDNS_XMALLOC(unsigned char, size);
1200 if(!hmac) {
1201 ldns_key_free(k);
1202 return NULL;
1203 }
1204 #ifdef HAVE_SSL
1205 if (RAND_bytes(hmac, (int) size) != 1) {
1206 LDNS_FREE(hmac);
1207 ldns_key_free(k);
1208 return NULL;
1209 }
1210 #else
1211 while (offset + sizeof(i) < size) {
1212 i = random();
1213 memcpy(&hmac[offset], &i, sizeof(i));
1214 offset += sizeof(i);
1215 }
1216 if (offset < size) {
1217 i = random();
1218 memcpy(&hmac[offset], &i, size - offset);
1219 }
1220 #endif /* HAVE_SSL */
1221 ldns_key_set_hmac_key(k, hmac);
1222
1223 ldns_key_set_flags(k, 0);
1224 break;
1225 case LDNS_SIGN_ECC_GOST:
1226 #if defined(HAVE_SSL) && defined(USE_GOST)
1227 ldns_key_set_evp_key(k, ldns_gen_gost_key());
1228 #ifndef S_SPLINT_S
1229 if(!k->_key.key) {
1230 ldns_key_free(k);
1231 return NULL;
1232 }
1233 #endif /* splint */
1234 #else
1235 ldns_key_free(k);
1236 return NULL;
1237 #endif /* HAVE_SSL and USE_GOST */
1238 break;
1239 case LDNS_SIGN_ECDSAP256SHA256:
1240 case LDNS_SIGN_ECDSAP384SHA384:
1241 #ifdef USE_ECDSA
1242 if(alg == LDNS_SIGN_ECDSAP256SHA256)
1243 ec = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
1244 else if(alg == LDNS_SIGN_ECDSAP384SHA384)
1245 ec = EC_KEY_new_by_curve_name(NID_secp384r1);
1246 if(!ec) {
1247 ldns_key_free(k);
1248 return NULL;
1249 }
1250 if(!EC_KEY_generate_key(ec)) {
1251 ldns_key_free(k);
1252 EC_KEY_free(ec);
1253 return NULL;
1254 }
1255 #ifndef S_SPLINT_S
1256 k->_key.key = EVP_PKEY_new();
1257 if(!k->_key.key) {
1258 ldns_key_free(k);
1259 EC_KEY_free(ec);
1260 return NULL;
1261 }
1262 if (!EVP_PKEY_assign_EC_KEY(k->_key.key, ec)) {
1263 ldns_key_free(k);
1264 EC_KEY_free(ec);
1265 return NULL;
1266 }
1267 #endif /* splint */
1268 #else
1269 ldns_key_free(k);
1270 return NULL;
1271 #endif /* ECDSA */
1272 break;
1273 #ifdef USE_ED25519
1274 case LDNS_SIGN_ED25519:
1275 #ifdef HAVE_EVP_PKEY_KEYGEN
1276 ctx = EVP_PKEY_CTX_new_id(NID_ED25519, NULL);
1277 if(!ctx) {
1278 ldns_key_free(k);
1279 return NULL;
1280 }
1281 if(EVP_PKEY_keygen_init(ctx) <= 0) {
1282 ldns_key_free(k);
1283 EVP_PKEY_CTX_free(ctx);
1284 return NULL;
1285 }
1286 if (EVP_PKEY_keygen(ctx, &k->_key.key) <= 0) {
1287 ldns_key_free(k);
1288 EVP_PKEY_CTX_free(ctx);
1289 return NULL;
1290 }
1291 EVP_PKEY_CTX_free(ctx);
1292 #endif
1293 break;
1294 #endif /* ED25519 */
1295 #ifdef USE_ED448
1296 case LDNS_SIGN_ED448:
1297 #ifdef HAVE_EVP_PKEY_KEYGEN
1298 ctx = EVP_PKEY_CTX_new_id(NID_ED448, NULL);
1299 if(!ctx) {
1300 ldns_key_free(k);
1301 return NULL;
1302 }
1303 if(EVP_PKEY_keygen_init(ctx) <= 0) {
1304 ldns_key_free(k);
1305 EVP_PKEY_CTX_free(ctx);
1306 return NULL;
1307 }
1308 if (EVP_PKEY_keygen(ctx, &k->_key.key) <= 0) {
1309 ldns_key_free(k);
1310 EVP_PKEY_CTX_free(ctx);
1311 return NULL;
1312 }
1313 EVP_PKEY_CTX_free(ctx);
1314 #endif
1315 break;
1316 #endif /* ED448 */
1317 }
1318 ldns_key_set_algorithm(k, alg);
1319 return k;
1320 }
1321
1322 void
ldns_key_print(FILE * output,const ldns_key * k)1323 ldns_key_print(FILE *output, const ldns_key *k)
1324 {
1325 char *str = ldns_key2str(k);
1326 if (str) {
1327 fprintf(output, "%s", str);
1328 } else {
1329 fprintf(output, "Unable to convert private key to string\n");
1330 }
1331 LDNS_FREE(str);
1332 }
1333
1334
1335 void
ldns_key_set_algorithm(ldns_key * k,ldns_signing_algorithm l)1336 ldns_key_set_algorithm(ldns_key *k, ldns_signing_algorithm l)
1337 {
1338 k->_alg = l;
1339 }
1340
1341 void
ldns_key_set_flags(ldns_key * k,uint16_t f)1342 ldns_key_set_flags(ldns_key *k, uint16_t f)
1343 {
1344 k->_extra.dnssec.flags = f;
1345 }
1346
1347 #ifdef HAVE_SSL
1348 #ifndef S_SPLINT_S
1349 void
ldns_key_set_evp_key(ldns_key * k,EVP_PKEY * e)1350 ldns_key_set_evp_key(ldns_key *k, EVP_PKEY *e)
1351 {
1352 k->_key.key = e;
1353 }
1354
1355 void
ldns_key_set_rsa_key(ldns_key * k,RSA * r)1356 ldns_key_set_rsa_key(ldns_key *k, RSA *r)
1357 {
1358 EVP_PKEY *key = EVP_PKEY_new();
1359 EVP_PKEY_set1_RSA(key, r);
1360 k->_key.key = key;
1361 }
1362
1363 void
ldns_key_set_dsa_key(ldns_key * k,DSA * d)1364 ldns_key_set_dsa_key(ldns_key *k, DSA *d)
1365 {
1366 #ifdef USE_DSA
1367 EVP_PKEY *key = EVP_PKEY_new();
1368 EVP_PKEY_set1_DSA(key, d);
1369 k->_key.key = key;
1370 #else
1371 (void)k; (void)d;
1372 #endif
1373 }
1374
1375 void
ldns_key_assign_rsa_key(ldns_key * k,RSA * r)1376 ldns_key_assign_rsa_key(ldns_key *k, RSA *r)
1377 {
1378 EVP_PKEY *key = EVP_PKEY_new();
1379 EVP_PKEY_assign_RSA(key, r);
1380 k->_key.key = key;
1381 }
1382
1383 void
ldns_key_assign_dsa_key(ldns_key * k,DSA * d)1384 ldns_key_assign_dsa_key(ldns_key *k, DSA *d)
1385 {
1386 #ifdef USE_DSA
1387 EVP_PKEY *key = EVP_PKEY_new();
1388 EVP_PKEY_assign_DSA(key, d);
1389 k->_key.key = key;
1390 #else
1391 (void)k; (void)d;
1392 #endif
1393 }
1394 #endif /* splint */
1395 #endif /* HAVE_SSL */
1396
1397 void
ldns_key_set_hmac_key(ldns_key * k,unsigned char * hmac)1398 ldns_key_set_hmac_key(ldns_key *k, unsigned char *hmac)
1399 {
1400 k->_key.hmac.key = hmac;
1401 }
1402
1403 void
ldns_key_set_hmac_size(ldns_key * k,size_t hmac_size)1404 ldns_key_set_hmac_size(ldns_key *k, size_t hmac_size)
1405 {
1406 k->_key.hmac.size = hmac_size;
1407 }
1408
1409 void
ldns_key_set_external_key(ldns_key * k,void * external_key)1410 ldns_key_set_external_key(ldns_key *k, void *external_key)
1411 {
1412 k->_key.external_key = external_key;
1413 }
1414
1415 void
ldns_key_set_origttl(ldns_key * k,uint32_t t)1416 ldns_key_set_origttl(ldns_key *k, uint32_t t)
1417 {
1418 k->_extra.dnssec.orig_ttl = t;
1419 }
1420
1421 void
ldns_key_set_inception(ldns_key * k,uint32_t i)1422 ldns_key_set_inception(ldns_key *k, uint32_t i)
1423 {
1424 k->_extra.dnssec.inception = i;
1425 }
1426
1427 void
ldns_key_set_expiration(ldns_key * k,uint32_t e)1428 ldns_key_set_expiration(ldns_key *k, uint32_t e)
1429 {
1430 k->_extra.dnssec.expiration = e;
1431 }
1432
1433 void
ldns_key_set_pubkey_owner(ldns_key * k,ldns_rdf * r)1434 ldns_key_set_pubkey_owner(ldns_key *k, ldns_rdf *r)
1435 {
1436 k->_pubkey_owner = r;
1437 }
1438
1439 void
ldns_key_set_keytag(ldns_key * k,uint16_t tag)1440 ldns_key_set_keytag(ldns_key *k, uint16_t tag)
1441 {
1442 k->_extra.dnssec.keytag = tag;
1443 }
1444
1445 /* read */
1446 size_t
ldns_key_list_key_count(const ldns_key_list * key_list)1447 ldns_key_list_key_count(const ldns_key_list *key_list)
1448 {
1449 return key_list ? key_list->_key_count : 0;
1450 }
1451
1452 ldns_key *
ldns_key_list_key(const ldns_key_list * key,size_t nr)1453 ldns_key_list_key(const ldns_key_list *key, size_t nr)
1454 {
1455 if (nr < ldns_key_list_key_count(key)) {
1456 return key->_keys[nr];
1457 } else {
1458 return NULL;
1459 }
1460 }
1461
1462 ldns_signing_algorithm
ldns_key_algorithm(const ldns_key * k)1463 ldns_key_algorithm(const ldns_key *k)
1464 {
1465 return k->_alg;
1466 }
1467
1468 void
ldns_key_set_use(ldns_key * k,bool v)1469 ldns_key_set_use(ldns_key *k, bool v)
1470 {
1471 if (k) {
1472 k->_use = v;
1473 }
1474 }
1475
1476 bool
ldns_key_use(const ldns_key * k)1477 ldns_key_use(const ldns_key *k)
1478 {
1479 if (k) {
1480 return k->_use;
1481 }
1482 return false;
1483 }
1484
1485 #ifdef HAVE_SSL
1486 #ifndef S_SPLINT_S
1487 EVP_PKEY *
ldns_key_evp_key(const ldns_key * k)1488 ldns_key_evp_key(const ldns_key *k)
1489 {
1490 return k->_key.key;
1491 }
1492
1493 RSA *
ldns_key_rsa_key(const ldns_key * k)1494 ldns_key_rsa_key(const ldns_key *k)
1495 {
1496 if (k->_key.key) {
1497 return EVP_PKEY_get1_RSA(k->_key.key);
1498 } else {
1499 return NULL;
1500 }
1501 }
1502
1503 DSA *
ldns_key_dsa_key(const ldns_key * k)1504 ldns_key_dsa_key(const ldns_key *k)
1505 {
1506 #ifdef USE_DSA
1507 if (k->_key.key) {
1508 return EVP_PKEY_get1_DSA(k->_key.key);
1509 } else {
1510 return NULL;
1511 }
1512 #else
1513 (void)k;
1514 return NULL;
1515 #endif
1516 }
1517 #endif /* splint */
1518 #endif /* HAVE_SSL */
1519
1520 unsigned char *
ldns_key_hmac_key(const ldns_key * k)1521 ldns_key_hmac_key(const ldns_key *k)
1522 {
1523 if (k->_key.hmac.key) {
1524 return k->_key.hmac.key;
1525 } else {
1526 return NULL;
1527 }
1528 }
1529
1530 size_t
ldns_key_hmac_size(const ldns_key * k)1531 ldns_key_hmac_size(const ldns_key *k)
1532 {
1533 if (k->_key.hmac.size) {
1534 return k->_key.hmac.size;
1535 } else {
1536 return 0;
1537 }
1538 }
1539
1540 void *
ldns_key_external_key(const ldns_key * k)1541 ldns_key_external_key(const ldns_key *k)
1542 {
1543 return k->_key.external_key;
1544 }
1545
1546 uint32_t
ldns_key_origttl(const ldns_key * k)1547 ldns_key_origttl(const ldns_key *k)
1548 {
1549 return k->_extra.dnssec.orig_ttl;
1550 }
1551
1552 uint16_t
ldns_key_flags(const ldns_key * k)1553 ldns_key_flags(const ldns_key *k)
1554 {
1555 return k->_extra.dnssec.flags;
1556 }
1557
1558 uint32_t
ldns_key_inception(const ldns_key * k)1559 ldns_key_inception(const ldns_key *k)
1560 {
1561 return k->_extra.dnssec.inception;
1562 }
1563
1564 uint32_t
ldns_key_expiration(const ldns_key * k)1565 ldns_key_expiration(const ldns_key *k)
1566 {
1567 return k->_extra.dnssec.expiration;
1568 }
1569
1570 uint16_t
ldns_key_keytag(const ldns_key * k)1571 ldns_key_keytag(const ldns_key *k)
1572 {
1573 return k->_extra.dnssec.keytag;
1574 }
1575
1576 ldns_rdf *
ldns_key_pubkey_owner(const ldns_key * k)1577 ldns_key_pubkey_owner(const ldns_key *k)
1578 {
1579 return k->_pubkey_owner;
1580 }
1581
1582 /* write */
1583 void
ldns_key_list_set_use(ldns_key_list * keys,bool v)1584 ldns_key_list_set_use(ldns_key_list *keys, bool v)
1585 {
1586 size_t i;
1587
1588 for (i = 0; i < ldns_key_list_key_count(keys); i++) {
1589 ldns_key_set_use(ldns_key_list_key(keys, i), v);
1590 }
1591 }
1592
1593 void
ldns_key_list_set_key_count(ldns_key_list * key,size_t count)1594 ldns_key_list_set_key_count(ldns_key_list *key, size_t count)
1595 {
1596 key->_key_count = count;
1597 }
1598
1599 bool
ldns_key_list_push_key(ldns_key_list * key_list,ldns_key * key)1600 ldns_key_list_push_key(ldns_key_list *key_list, ldns_key *key)
1601 {
1602 size_t key_count;
1603 ldns_key **keys;
1604
1605 key_count = ldns_key_list_key_count(key_list);
1606
1607 /* grow the array */
1608 keys = LDNS_XREALLOC(
1609 key_list->_keys, ldns_key *, key_count + 1);
1610 if (!keys) {
1611 return false;
1612 }
1613
1614 /* add the new member */
1615 key_list->_keys = keys;
1616 key_list->_keys[key_count] = key;
1617
1618 ldns_key_list_set_key_count(key_list, key_count + 1);
1619 return true;
1620 }
1621
1622 ldns_key *
ldns_key_list_pop_key(ldns_key_list * key_list)1623 ldns_key_list_pop_key(ldns_key_list *key_list)
1624 {
1625 size_t key_count;
1626 ldns_key** a;
1627 ldns_key *pop;
1628
1629 if (!key_list) {
1630 return NULL;
1631 }
1632
1633 key_count = ldns_key_list_key_count(key_list);
1634 if (key_count == 0) {
1635 return NULL;
1636 }
1637
1638 pop = ldns_key_list_key(key_list, key_count);
1639
1640 /* shrink the array */
1641 a = LDNS_XREALLOC(key_list->_keys, ldns_key *, key_count - 1);
1642 if(a) {
1643 key_list->_keys = a;
1644 }
1645
1646 ldns_key_list_set_key_count(key_list, key_count - 1);
1647
1648 return pop;
1649 }
1650
1651 #ifdef HAVE_SSL
1652 #ifndef S_SPLINT_S
1653 /* data pointer must be large enough (LDNS_MAX_KEYLEN) */
1654 static bool
ldns_key_rsa2bin(unsigned char * data,RSA * k,uint16_t * size)1655 ldns_key_rsa2bin(unsigned char *data, RSA *k, uint16_t *size)
1656 {
1657 int i,j;
1658 const BIGNUM *n=NULL, *e=NULL;
1659
1660 if (!k) {
1661 return false;
1662 }
1663 #if OPENSSL_VERSION_NUMBER < 0x10100000 || (defined(HAVE_LIBRESSL) && LIBRESSL_VERSION_NUMBER < 0x20700000)
1664 n = k->n;
1665 e = k->e;
1666 #else
1667 RSA_get0_key(k, &n, &e, NULL);
1668 #endif
1669
1670 if (BN_num_bytes(e) <= 256) {
1671 /* normally only this path is executed (small factors are
1672 * more common
1673 */
1674 data[0] = (unsigned char) BN_num_bytes(e);
1675 i = BN_bn2bin(e, data + 1);
1676 j = BN_bn2bin(n, data + i + 1);
1677 *size = (uint16_t) i + j;
1678 } else if (BN_num_bytes(e) <= 65536) {
1679 data[0] = 0;
1680 /* BN_bn2bin does bigendian, _uint16 also */
1681 ldns_write_uint16(data + 1, (uint16_t) BN_num_bytes(e));
1682
1683 BN_bn2bin(e, data + 3);
1684 BN_bn2bin(n, data + 4 + BN_num_bytes(e));
1685 *size = (uint16_t) BN_num_bytes(n) + 6;
1686 } else {
1687 return false;
1688 }
1689 return true;
1690 }
1691
1692 #ifdef USE_DSA
1693 /* data pointer must be large enough (LDNS_MAX_KEYLEN) */
1694 static bool
ldns_key_dsa2bin(unsigned char * data,DSA * k,uint16_t * size)1695 ldns_key_dsa2bin(unsigned char *data, DSA *k, uint16_t *size)
1696 {
1697 uint8_t T;
1698 const BIGNUM *p, *q, *g;
1699 const BIGNUM *pub_key, *priv_key;
1700
1701 if (!k) {
1702 return false;
1703 }
1704
1705 /* See RFC2536 */
1706 # ifdef HAVE_DSA_GET0_PQG
1707 DSA_get0_pqg(k, &p, &q, &g);
1708 # else
1709 p = k->p; q = k->q; g = k->g;
1710 # endif
1711 # ifdef HAVE_DSA_GET0_KEY
1712 DSA_get0_key(k, &pub_key, &priv_key);
1713 # else
1714 pub_key = k->pub_key; priv_key = k->priv_key;
1715 # endif
1716 (void)priv_key;
1717 *size = (uint16_t)BN_num_bytes(p);
1718 T = (*size - 64) / 8;
1719
1720 if (T > 8) {
1721 #ifdef STDERR_MSGS
1722 fprintf(stderr, "DSA key with T > 8 (ie. > 1024 bits)");
1723 fprintf(stderr, " not implemented\n");
1724 #endif
1725 return false;
1726 }
1727
1728 /* size = 64 + (T * 8); */
1729 memset(data, 0, 21 + *size * 3);
1730 data[0] = (unsigned char)T;
1731 BN_bn2bin(q, data + 1 ); /* 20 octects */
1732 BN_bn2bin(p, data + 21 ); /* offset octects */
1733 BN_bn2bin(g, data + 21 + *size * 2 - BN_num_bytes(g));
1734 BN_bn2bin(pub_key,data + 21 + *size * 3 - BN_num_bytes(pub_key));
1735 *size = 21 + *size * 3;
1736 return true;
1737 }
1738 #endif /* USE_DSA */
1739
1740 #ifdef USE_GOST
1741 static bool
ldns_key_gost2bin(unsigned char * data,EVP_PKEY * k,uint16_t * size)1742 ldns_key_gost2bin(unsigned char* data, EVP_PKEY* k, uint16_t* size)
1743 {
1744 int i;
1745 unsigned char* pp = NULL;
1746 if(i2d_PUBKEY(k, &pp) != 37 + 64) {
1747 /* expect 37 byte(ASN header) and 64 byte(X and Y) */
1748 free(pp);
1749 return false;
1750 }
1751 /* omit ASN header */
1752 for(i=0; i<64; i++)
1753 data[i] = pp[i+37];
1754 free(pp);
1755 *size = 64;
1756 return true;
1757 }
1758 #endif /* USE_GOST */
1759
1760 #ifdef USE_ED25519
1761 static bool
ldns_key_ed255192bin(unsigned char * data,EVP_PKEY * k,uint16_t * size)1762 ldns_key_ed255192bin(unsigned char* data, EVP_PKEY* k, uint16_t* size)
1763 {
1764 int i;
1765 unsigned char* pp = NULL;
1766 if(i2d_PUBKEY(k, &pp) != 12 + 32) {
1767 /* expect 12 byte(ASN header) and 32 byte(pubkey) */
1768 free(pp);
1769 return false;
1770 }
1771 /* omit ASN header */
1772 for(i=0; i<32; i++)
1773 data[i] = pp[i+12];
1774 free(pp);
1775 *size = 32;
1776 return true;
1777 }
1778 #endif /* USE_ED25519 */
1779
1780 #ifdef USE_ED448
1781 static bool
ldns_key_ed4482bin(unsigned char * data,EVP_PKEY * k,uint16_t * size)1782 ldns_key_ed4482bin(unsigned char* data, EVP_PKEY* k, uint16_t* size)
1783 {
1784 int i;
1785 unsigned char* pp = NULL;
1786 if(i2d_PUBKEY(k, &pp) != 12 + 57) {
1787 /* expect 12 byte(ASN header) and 57 byte(pubkey) */
1788 free(pp);
1789 return false;
1790 }
1791 /* omit ASN header */
1792 for(i=0; i<57; i++)
1793 data[i] = pp[i+12];
1794 free(pp);
1795 *size = 57;
1796 return true;
1797 }
1798 #endif /* USE_ED448 */
1799 #endif /* splint */
1800 #endif /* HAVE_SSL */
1801
1802 ldns_rr *
ldns_key2rr(const ldns_key * k)1803 ldns_key2rr(const ldns_key *k)
1804 {
1805 /* this function will convert a the keydata contained in
1806 * rsa/dsa pointers to a DNSKEY rr. It will fill in as
1807 * much as it can, but it does not know about key-flags
1808 * for instance
1809 */
1810 ldns_rr *pubkey;
1811 ldns_rdf *keybin;
1812 unsigned char *bin = NULL;
1813 uint16_t size = 0;
1814 #ifdef HAVE_SSL
1815 RSA *rsa = NULL;
1816 #ifdef USE_DSA
1817 DSA *dsa = NULL;
1818 #endif /* USE_DSA */
1819 #endif /* HAVE_SSL */
1820 #ifdef USE_ECDSA
1821 EC_KEY* ec;
1822 #endif
1823 int internal_data = 0;
1824
1825 if (!k) {
1826 return NULL;
1827 }
1828 pubkey = ldns_rr_new();
1829
1830 switch (ldns_key_algorithm(k)) {
1831 case LDNS_SIGN_HMACMD5:
1832 case LDNS_SIGN_HMACSHA1:
1833 case LDNS_SIGN_HMACSHA224:
1834 case LDNS_SIGN_HMACSHA256:
1835 case LDNS_SIGN_HMACSHA384:
1836 case LDNS_SIGN_HMACSHA512:
1837 ldns_rr_set_type(pubkey, LDNS_RR_TYPE_KEY);
1838 break;
1839 default:
1840 ldns_rr_set_type(pubkey, LDNS_RR_TYPE_DNSKEY);
1841 break;
1842 }
1843 /* zero-th rdf - flags */
1844 ldns_rr_push_rdf(pubkey,
1845 ldns_native2rdf_int16(LDNS_RDF_TYPE_INT16,
1846 ldns_key_flags(k)));
1847 /* first - proto */
1848 ldns_rr_push_rdf(pubkey,
1849 ldns_native2rdf_int8(LDNS_RDF_TYPE_INT8, LDNS_DNSSEC_KEYPROTO));
1850
1851 if (ldns_key_pubkey_owner(k)) {
1852 ldns_rr_set_owner(pubkey, ldns_rdf_clone(ldns_key_pubkey_owner(k)));
1853 }
1854
1855 /* third - da algorithm */
1856 switch(ldns_key_algorithm(k)) {
1857 case LDNS_SIGN_RSAMD5:
1858 case LDNS_SIGN_RSASHA1:
1859 case LDNS_SIGN_RSASHA1_NSEC3:
1860 case LDNS_SIGN_RSASHA256:
1861 case LDNS_SIGN_RSASHA512:
1862 ldns_rr_push_rdf(pubkey,
1863 ldns_native2rdf_int8(LDNS_RDF_TYPE_ALG, ldns_key_algorithm(k)));
1864 #ifdef HAVE_SSL
1865 rsa = ldns_key_rsa_key(k);
1866 if (rsa) {
1867 bin = LDNS_XMALLOC(unsigned char, LDNS_MAX_KEYLEN);
1868 if (!bin) {
1869 ldns_rr_free(pubkey);
1870 return NULL;
1871 }
1872 if (!ldns_key_rsa2bin(bin, rsa, &size)) {
1873 LDNS_FREE(bin);
1874 ldns_rr_free(pubkey);
1875 return NULL;
1876 }
1877 RSA_free(rsa);
1878 internal_data = 1;
1879 }
1880 #endif
1881 size++;
1882 break;
1883 #ifdef USE_DSA
1884 case LDNS_SIGN_DSA:
1885 ldns_rr_push_rdf(pubkey,
1886 ldns_native2rdf_int8(LDNS_RDF_TYPE_ALG, LDNS_DSA));
1887 #ifdef HAVE_SSL
1888 dsa = ldns_key_dsa_key(k);
1889 if (dsa) {
1890 bin = LDNS_XMALLOC(unsigned char, LDNS_MAX_KEYLEN);
1891 if (!bin) {
1892 ldns_rr_free(pubkey);
1893 return NULL;
1894 }
1895 if (!ldns_key_dsa2bin(bin, dsa, &size)) {
1896 LDNS_FREE(bin);
1897 ldns_rr_free(pubkey);
1898 return NULL;
1899 }
1900 DSA_free(dsa);
1901 internal_data = 1;
1902 }
1903 #endif /* HAVE_SSL */
1904 #endif /* USE_DSA */
1905 break;
1906 #ifdef USE_DSA
1907 case LDNS_SIGN_DSA_NSEC3:
1908 ldns_rr_push_rdf(pubkey,
1909 ldns_native2rdf_int8(LDNS_RDF_TYPE_ALG, LDNS_DSA_NSEC3));
1910 #ifdef HAVE_SSL
1911 dsa = ldns_key_dsa_key(k);
1912 if (dsa) {
1913 bin = LDNS_XMALLOC(unsigned char, LDNS_MAX_KEYLEN);
1914 if (!bin) {
1915 ldns_rr_free(pubkey);
1916 return NULL;
1917 }
1918 if (!ldns_key_dsa2bin(bin, dsa, &size)) {
1919 LDNS_FREE(bin);
1920 ldns_rr_free(pubkey);
1921 return NULL;
1922 }
1923 DSA_free(dsa);
1924 internal_data = 1;
1925 }
1926 #endif /* HAVE_SSL */
1927 #endif /* USE_DSA */
1928 break;
1929 case LDNS_SIGN_ECC_GOST:
1930 ldns_rr_push_rdf(pubkey, ldns_native2rdf_int8(
1931 LDNS_RDF_TYPE_ALG, ldns_key_algorithm(k)));
1932 #if defined(HAVE_SSL) && defined(USE_GOST)
1933 bin = LDNS_XMALLOC(unsigned char, LDNS_MAX_KEYLEN);
1934 if (!bin) {
1935 ldns_rr_free(pubkey);
1936 return NULL;
1937 }
1938 #ifndef S_SPLINT_S
1939 if (!ldns_key_gost2bin(bin, k->_key.key, &size)) {
1940 LDNS_FREE(bin);
1941 ldns_rr_free(pubkey);
1942 return NULL;
1943 }
1944 #endif /* splint */
1945 internal_data = 1;
1946 #else
1947 ldns_rr_free(pubkey);
1948 return NULL;
1949 #endif /* HAVE_SSL and USE_GOST */
1950 break;
1951 case LDNS_SIGN_ECDSAP256SHA256:
1952 case LDNS_SIGN_ECDSAP384SHA384:
1953 #ifdef USE_ECDSA
1954 ldns_rr_push_rdf(pubkey, ldns_native2rdf_int8(
1955 LDNS_RDF_TYPE_ALG, ldns_key_algorithm(k)));
1956 bin = NULL;
1957 #ifndef S_SPLINT_S
1958 ec = EVP_PKEY_get1_EC_KEY(k->_key.key);
1959 #endif
1960 EC_KEY_set_conv_form(ec, POINT_CONVERSION_UNCOMPRESSED);
1961 size = (uint16_t)i2o_ECPublicKey(ec, NULL);
1962 if(!i2o_ECPublicKey(ec, &bin)) {
1963 EC_KEY_free(ec);
1964 ldns_rr_free(pubkey);
1965 return NULL;
1966 }
1967 if(size > 1) {
1968 /* move back one byte to shave off the 0x02
1969 * 'uncompressed' indicator that openssl made
1970 * Actually its 0x04 (from implementation).
1971 */
1972 assert(bin[0] == POINT_CONVERSION_UNCOMPRESSED);
1973 size -= 1;
1974 memmove(bin, bin+1, size);
1975 }
1976 /* down the reference count for ec, its still assigned
1977 * to the pkey */
1978 EC_KEY_free(ec);
1979 internal_data = 1;
1980 #else
1981 ldns_rr_free(pubkey);
1982 return NULL;
1983 #endif /* ECDSA */
1984 break;
1985 #ifdef USE_ED25519
1986 case LDNS_SIGN_ED25519:
1987 ldns_rr_push_rdf(pubkey, ldns_native2rdf_int8(
1988 LDNS_RDF_TYPE_ALG, ldns_key_algorithm(k)));
1989 bin = LDNS_XMALLOC(unsigned char, LDNS_MAX_KEYLEN);
1990 if (!bin) {
1991 ldns_rr_free(pubkey);
1992 return NULL;
1993 }
1994 if (!ldns_key_ed255192bin(bin, k->_key.key, &size)) {
1995 LDNS_FREE(bin);
1996 ldns_rr_free(pubkey);
1997 return NULL;
1998 }
1999 internal_data = 1;
2000 break;
2001 #endif
2002 #ifdef USE_ED448
2003 case LDNS_SIGN_ED448:
2004 ldns_rr_push_rdf(pubkey, ldns_native2rdf_int8(
2005 LDNS_RDF_TYPE_ALG, ldns_key_algorithm(k)));
2006 bin = LDNS_XMALLOC(unsigned char, LDNS_MAX_KEYLEN);
2007 if (!bin) {
2008 ldns_rr_free(pubkey);
2009 return NULL;
2010 }
2011 if (!ldns_key_ed4482bin(bin, k->_key.key, &size)) {
2012 LDNS_FREE(bin);
2013 ldns_rr_free(pubkey);
2014 return NULL;
2015 }
2016 internal_data = 1;
2017 break;
2018 #endif
2019 case LDNS_SIGN_HMACMD5:
2020 case LDNS_SIGN_HMACSHA1:
2021 case LDNS_SIGN_HMACSHA224:
2022 case LDNS_SIGN_HMACSHA256:
2023 case LDNS_SIGN_HMACSHA384:
2024 case LDNS_SIGN_HMACSHA512:
2025 bin = LDNS_XMALLOC(unsigned char, ldns_key_hmac_size(k));
2026 if (!bin) {
2027 ldns_rr_free(pubkey);
2028 return NULL;
2029 }
2030 ldns_rr_push_rdf(pubkey,
2031 ldns_native2rdf_int8(LDNS_RDF_TYPE_ALG,
2032 ldns_key_algorithm(k)));
2033 size = ldns_key_hmac_size(k);
2034 memcpy(bin, ldns_key_hmac_key(k), size);
2035 internal_data = 1;
2036 break;
2037 }
2038 /* fourth the key bin material */
2039 if (internal_data) {
2040 keybin = ldns_rdf_new_frm_data(LDNS_RDF_TYPE_B64, size, bin);
2041 LDNS_FREE(bin);
2042 ldns_rr_push_rdf(pubkey, keybin);
2043 }
2044 return pubkey;
2045 }
2046
2047 void
ldns_key_free(ldns_key * key)2048 ldns_key_free(ldns_key *key)
2049 {
2050 LDNS_FREE(key);
2051 }
2052
2053 void
ldns_key_deep_free(ldns_key * key)2054 ldns_key_deep_free(ldns_key *key)
2055 {
2056 unsigned char* hmac;
2057 if (ldns_key_pubkey_owner(key)) {
2058 ldns_rdf_deep_free(ldns_key_pubkey_owner(key));
2059 }
2060 #ifdef HAVE_SSL
2061 if (ldns_key_evp_key(key)) {
2062 EVP_PKEY_free(ldns_key_evp_key(key));
2063 }
2064 #endif /* HAVE_SSL */
2065 if (ldns_key_hmac_key(key)) {
2066 hmac = ldns_key_hmac_key(key);
2067 LDNS_FREE(hmac);
2068 }
2069 LDNS_FREE(key);
2070 }
2071
2072 void
ldns_key_list_free(ldns_key_list * key_list)2073 ldns_key_list_free(ldns_key_list *key_list)
2074 {
2075 size_t i;
2076 for (i = 0; i < ldns_key_list_key_count(key_list); i++) {
2077 ldns_key_deep_free(ldns_key_list_key(key_list, i));
2078 }
2079 LDNS_FREE(key_list->_keys);
2080 LDNS_FREE(key_list);
2081 }
2082
2083 ldns_rr *
ldns_read_anchor_file(const char * filename)2084 ldns_read_anchor_file(const char *filename)
2085 {
2086 FILE *fp;
2087 /*char line[LDNS_MAX_PACKETLEN];*/
2088 char *line = LDNS_XMALLOC(char, LDNS_MAX_PACKETLEN);
2089 int c;
2090 size_t i = 0;
2091 ldns_rr *r;
2092 ldns_status status;
2093 if(!line) {
2094 return NULL;
2095 }
2096
2097 fp = fopen(filename, "r");
2098 if (!fp) {
2099 #ifdef STDERR_MSGS
2100 fprintf(stderr, "Unable to open %s: %s\n", filename, strerror(errno));
2101 #endif
2102 LDNS_FREE(line);
2103 return NULL;
2104 }
2105
2106 while ((c = fgetc(fp)) && i+1 < LDNS_MAX_PACKETLEN && c != EOF) {
2107 line[i] = c;
2108 i++;
2109 }
2110 line[i] = '\0';
2111
2112 fclose(fp);
2113
2114 if (i <= 0) {
2115 #ifdef STDERR_MSGS
2116 fprintf(stderr, "nothing read from %s", filename);
2117 #endif
2118 LDNS_FREE(line);
2119 return NULL;
2120 } else {
2121 status = ldns_rr_new_frm_str(&r, line, 0, NULL, NULL);
2122 if (status == LDNS_STATUS_OK && (ldns_rr_get_type(r) == LDNS_RR_TYPE_DNSKEY || ldns_rr_get_type(r) == LDNS_RR_TYPE_DS)) {
2123 LDNS_FREE(line);
2124 return r;
2125 } else {
2126 #ifdef STDERR_MSGS
2127 fprintf(stderr, "Error creating DNSKEY or DS rr from %s: %s\n", filename, ldns_get_errorstr_by_id(status));
2128 #endif
2129 LDNS_FREE(line);
2130 return NULL;
2131 }
2132 }
2133 }
2134
2135 char *
ldns_key_get_file_base_name(const ldns_key * key)2136 ldns_key_get_file_base_name(const ldns_key *key)
2137 {
2138 ldns_buffer *buffer;
2139 char *file_base_name;
2140
2141 buffer = ldns_buffer_new(255);
2142 ldns_buffer_printf(buffer, "K");
2143 (void)ldns_rdf2buffer_str_dname(buffer, ldns_key_pubkey_owner(key));
2144 ldns_buffer_printf(buffer,
2145 "+%03u+%05u",
2146 ldns_key_algorithm(key),
2147 ldns_key_keytag(key));
2148 file_base_name = ldns_buffer_export(buffer);
2149 ldns_buffer_free(buffer);
2150 return file_base_name;
2151 }
2152
ldns_key_algo_supported(int algo)2153 int ldns_key_algo_supported(int algo)
2154 {
2155 ldns_lookup_table *lt = ldns_signing_algorithms;
2156 while(lt->name) {
2157 if(lt->id == algo)
2158 return 1;
2159 lt++;
2160 }
2161 return 0;
2162 }
2163
ldns_get_signing_algorithm_by_name(const char * name)2164 ldns_signing_algorithm ldns_get_signing_algorithm_by_name(const char* name)
2165 {
2166 /* list of (signing algorithm id, alias_name) */
2167 ldns_lookup_table aliases[] = {
2168 /* from bind dnssec-keygen */
2169 {LDNS_SIGN_HMACMD5, "HMAC-MD5"},
2170 #ifdef USE_DSA
2171 {LDNS_SIGN_DSA_NSEC3, "NSEC3DSA"},
2172 #endif /* USE_DSA */
2173 {LDNS_SIGN_RSASHA1_NSEC3, "NSEC3RSASHA1"},
2174 /* old ldns usage, now RFC names */
2175 #ifdef USE_DSA
2176 {LDNS_SIGN_DSA_NSEC3, "DSA_NSEC3" },
2177 #endif
2178 {LDNS_SIGN_RSASHA1_NSEC3, "RSASHA1_NSEC3" },
2179 #ifdef USE_GOST
2180 {LDNS_SIGN_ECC_GOST, "GOST"},
2181 #endif
2182 /* compat with possible output */
2183 {LDNS_DH, "DH"},
2184 {LDNS_ECC, "ECC"},
2185 {LDNS_INDIRECT, "INDIRECT"},
2186 {LDNS_PRIVATEDNS, "PRIVATEDNS"},
2187 {LDNS_PRIVATEOID, "PRIVATEOID"},
2188 {0, NULL}};
2189 ldns_lookup_table* lt = ldns_signing_algorithms;
2190 ldns_signing_algorithm a;
2191 char *endptr;
2192
2193 while(lt->name) {
2194 if(strcasecmp(lt->name, name) == 0)
2195 return lt->id;
2196 lt++;
2197 }
2198 lt = aliases;
2199 while(lt->name) {
2200 if(strcasecmp(lt->name, name) == 0)
2201 return lt->id;
2202 lt++;
2203 }
2204 a = strtol(name, &endptr, 10);
2205 if (*name && !*endptr)
2206 return a;
2207
2208 return 0;
2209 }
2210