5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2002 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
21 #include "silcincludes.h"
26 /* The main SILC PKCS structure. */
27 struct SilcPKCSStruct {
28 void *context; /* Algorithm internal context */
29 SilcPKCSObject *pkcs; /* Algorithm implementation */
30 SilcUInt32 key_len; /* Key length in bits */
34 /* Dynamically registered list of PKCS. */
35 SilcDList silc_pkcs_list = NULL;
36 #define SILC_PKCS_LIST silc_pkcs_list
38 #define SILC_PKCS_LIST TRUE
39 #endif /* SILC_EPOC */
41 /* Static list of PKCS for silc_pkcs_register_default(). */
42 const SilcPKCSObject silc_default_pkcs[] =
44 /* RSA with PKCS #1 (Uses directly routines from Raw RSA operations) */
46 silc_rsa_init, silc_rsa_clear_keys, silc_rsa_get_public_key,
47 silc_rsa_get_private_key, silc_rsa_set_public_key,
48 silc_rsa_set_private_key, silc_rsa_context_len,
49 silc_pkcs1_encrypt, silc_pkcs1_decrypt,
50 silc_pkcs1_sign, silc_pkcs1_verify },
52 /* Raw RSA operations */
54 silc_rsa_init, silc_rsa_clear_keys, silc_rsa_get_public_key,
55 silc_rsa_get_private_key, silc_rsa_set_public_key,
56 silc_rsa_set_private_key, silc_rsa_context_len,
57 silc_rsa_encrypt, silc_rsa_decrypt,
58 silc_rsa_sign, silc_rsa_verify },
60 { NULL, NULL, NULL, NULL, NULL,
61 NULL, NULL, NULL, NULL, NULL, NULL }
64 /* Register a new PKCS into SILC. This is used at the initialization of
67 bool silc_pkcs_register(const SilcPKCSObject *pkcs)
72 SILC_LOG_DEBUG(("Registering new PKCS `%s'", pkcs->name));
74 /* Check if exists already */
76 SilcPKCSObject *entry;
77 silc_dlist_start(silc_pkcs_list);
78 while ((entry = silc_dlist_get(silc_pkcs_list)) != SILC_LIST_END) {
79 if (!strcmp(entry->name, pkcs->name))
84 new = silc_calloc(1, sizeof(*new));
85 new->name = strdup(pkcs->name);
86 new->init = pkcs->init;
87 new->clear_keys = pkcs->clear_keys;
88 new->get_public_key = pkcs->get_public_key;
89 new->get_private_key = pkcs->get_private_key;
90 new->set_public_key = pkcs->set_public_key;
91 new->set_private_key = pkcs->set_private_key;
92 new->context_len = pkcs->context_len;
93 new->encrypt = pkcs->encrypt;
94 new->decrypt = pkcs->decrypt;
95 new->sign = pkcs->sign;
96 new->verify = pkcs->verify;
99 if (silc_pkcs_list == NULL)
100 silc_pkcs_list = silc_dlist_init();
101 silc_dlist_add(silc_pkcs_list, new);
103 #endif /* SILC_EPOC */
107 /* Unregister a PKCS from the SILC. */
109 bool silc_pkcs_unregister(SilcPKCSObject *pkcs)
112 SilcPKCSObject *entry;
114 SILC_LOG_DEBUG(("Unregistering PKCS"));
119 silc_dlist_start(silc_pkcs_list);
120 while ((entry = silc_dlist_get(silc_pkcs_list)) != SILC_LIST_END) {
121 if (pkcs == SILC_ALL_PKCS || entry == pkcs) {
122 silc_dlist_del(silc_pkcs_list, entry);
123 silc_free(entry->name);
126 if (silc_dlist_count(silc_pkcs_list) == 0) {
127 silc_dlist_uninit(silc_pkcs_list);
128 silc_pkcs_list = NULL;
135 #endif /* SILC_EPOC */
139 /* Function that registers all the default PKCS (all builtin PKCS).
140 The application may use this to register the default PKCS if specific
141 PKCS in any specific order is not wanted. */
143 bool silc_pkcs_register_default(void)
148 for (i = 0; silc_default_pkcs[i].name; i++)
149 silc_pkcs_register(&(silc_default_pkcs[i]));
151 #endif /* SILC_EPOC */
155 bool silc_pkcs_unregister_all(void)
158 SilcPKCSObject *entry;
163 silc_dlist_start(silc_pkcs_list);
164 while ((entry = silc_dlist_get(silc_pkcs_list)) != SILC_LIST_END) {
165 silc_pkcs_unregister(entry);
169 #endif /* SILC_EPOC */
173 /* Allocates a new SilcPKCS object. The new allocated object is returned
174 to the 'new_pkcs' argument. */
176 bool silc_pkcs_alloc(const unsigned char *name, SilcPKCS *new_pkcs)
178 SilcPKCSObject *entry = NULL;
180 SILC_LOG_DEBUG(("Allocating new PKCS object"));
183 if (silc_pkcs_list) {
184 silc_dlist_start(silc_pkcs_list);
185 while ((entry = silc_dlist_get(silc_pkcs_list)) != SILC_LIST_END) {
186 if (!strcmp(entry->name, name))
192 /* On EPOC which don't have globals we check our constant hash list. */
194 for (i = 0; silc_default_pkcs[i].name; i++) {
195 if (!strcmp(silc_default_pkcs[i].name, name)) {
196 entry = (SilcPKCSObject *)&(silc_default_pkcs[i]);
201 #endif /* SILC_EPOC */
204 *new_pkcs = silc_calloc(1, sizeof(**new_pkcs));
205 (*new_pkcs)->pkcs = entry;
206 (*new_pkcs)->context = silc_calloc(1, entry->context_len());
213 /* Free's the PKCS object */
215 void silc_pkcs_free(SilcPKCS pkcs)
218 pkcs->pkcs->clear_keys(pkcs->context);
219 silc_free(pkcs->context);
224 /* Return TRUE if PKCS algorithm `name' is supported. */
226 int silc_pkcs_is_supported(const unsigned char *name)
229 SilcPKCSObject *entry;
231 if (silc_pkcs_list) {
232 silc_dlist_start(silc_pkcs_list);
233 while ((entry = silc_dlist_get(silc_pkcs_list)) != SILC_LIST_END) {
234 if (!strcmp(entry->name, name))
241 for (i = 0; silc_default_pkcs[i].name; i++)
242 if (!strcmp(silc_default_pkcs[i].name, name))
245 #endif /* SILC_EPOC */
249 /* Returns comma separated list of supported PKCS algorithms */
251 char *silc_pkcs_get_supported(void)
253 SilcPKCSObject *entry;
258 if (silc_pkcs_list) {
259 silc_dlist_start(silc_pkcs_list);
260 while ((entry = silc_dlist_get(silc_pkcs_list)) != SILC_LIST_END) {
261 len += strlen(entry->name);
262 list = silc_realloc(list, len + 1);
264 memcpy(list + (len - strlen(entry->name)),
265 entry->name, strlen(entry->name));
266 memcpy(list + len, ",", 1);
273 for (i = 0; silc_default_pkcs[i].name; i++) {
274 entry = (SilcPKCSObject *)&(silc_default_pkcs[i]);
275 len += strlen(entry->name);
276 list = silc_realloc(list, len + 1);
278 memcpy(list + (len - strlen(entry->name)),
279 entry->name, strlen(entry->name));
280 memcpy(list + len, ",", 1);
284 #endif /* SILC_EPOC */
291 /* Generate new key pair into the `pkcs' context. */
293 int silc_pkcs_generate_key(SilcPKCS pkcs, SilcUInt32 bits_key_len,
296 return pkcs->pkcs->init(pkcs->context, bits_key_len, rng);
299 /* Returns the length of the key */
301 SilcUInt32 silc_pkcs_get_key_len(SilcPKCS pkcs)
303 return pkcs->key_len;
306 const char *silc_pkcs_get_name(SilcPKCS pkcs)
308 return pkcs->pkcs->name;
311 /* Returns SILC style public key */
313 unsigned char *silc_pkcs_get_public_key(SilcPKCS pkcs, SilcUInt32 *len)
315 return pkcs->pkcs->get_public_key(pkcs->context, len);
318 /* Returns SILC style private key */
320 unsigned char *silc_pkcs_get_private_key(SilcPKCS pkcs, SilcUInt32 *len)
322 return pkcs->pkcs->get_private_key(pkcs->context, len);
325 /* Sets public key from SilcPublicKey. */
327 SilcUInt32 silc_pkcs_public_key_set(SilcPKCS pkcs, SilcPublicKey public_key)
329 pkcs->key_len = pkcs->pkcs->set_public_key(pkcs->context, public_key->pk,
331 return pkcs->key_len;
334 /* Sets public key from data. */
336 SilcUInt32 silc_pkcs_public_key_data_set(SilcPKCS pkcs, unsigned char *pk,
339 pkcs->key_len = pkcs->pkcs->set_public_key(pkcs->context, pk, pk_len);
340 return pkcs->key_len;
343 /* Sets private key from SilcPrivateKey. */
345 SilcUInt32 silc_pkcs_private_key_set(SilcPKCS pkcs, SilcPrivateKey private_key)
348 key_len = pkcs->pkcs->set_private_key(pkcs->context, private_key->prv,
349 private_key->prv_len);
351 pkcs->key_len = key_len;
352 return pkcs->key_len;
355 /* Sets private key from data. */
357 SilcUInt32 silc_pkcs_private_key_data_set(SilcPKCS pkcs, unsigned char *prv,
361 key_len = pkcs->pkcs->set_private_key(pkcs->context, prv, prv_len);
363 pkcs->key_len = key_len;
364 return pkcs->key_len;
369 int silc_pkcs_encrypt(SilcPKCS pkcs, unsigned char *src, SilcUInt32 src_len,
370 unsigned char *dst, SilcUInt32 *dst_len)
372 return pkcs->pkcs->encrypt(pkcs->context, src, src_len, dst, dst_len);
377 int silc_pkcs_decrypt(SilcPKCS pkcs, unsigned char *src, SilcUInt32 src_len,
378 unsigned char *dst, SilcUInt32 *dst_len)
380 return pkcs->pkcs->decrypt(pkcs->context, src, src_len, dst, dst_len);
383 /* Generates signature */
385 int silc_pkcs_sign(SilcPKCS pkcs, unsigned char *src, SilcUInt32 src_len,
386 unsigned char *dst, SilcUInt32 *dst_len)
388 return pkcs->pkcs->sign(pkcs->context, src, src_len, dst, dst_len);
391 /* Verifies signature */
393 int silc_pkcs_verify(SilcPKCS pkcs, unsigned char *signature,
394 SilcUInt32 signature_len, unsigned char *data,
397 return pkcs->pkcs->verify(pkcs->context, signature, signature_len,
401 /* Generates signature with hash. The hash is signed. */
403 int silc_pkcs_sign_with_hash(SilcPKCS pkcs, SilcHash hash,
404 unsigned char *src, SilcUInt32 src_len,
405 unsigned char *dst, SilcUInt32 *dst_len)
407 unsigned char hashr[32];
411 silc_hash_make(hash, src, src_len, hashr);
412 hash_len = silc_hash_len(hash);
414 SILC_LOG_HEXDUMP(("Hash"), hashr, hash_len);
416 ret = pkcs->pkcs->sign(pkcs->context, hashr, hash_len, dst, dst_len);
417 memset(hashr, 0, sizeof(hashr));
422 /* Verifies signature with hash. The `data' is hashed and verified against
425 int silc_pkcs_verify_with_hash(SilcPKCS pkcs, SilcHash hash,
426 unsigned char *signature,
427 SilcUInt32 signature_len,
431 unsigned char hashr[32];
435 silc_hash_make(hash, data, data_len, hashr);
436 hash_len = silc_hash_len(hash);
438 SILC_LOG_HEXDUMP(("Hash"), hashr, hash_len);
440 ret = pkcs->pkcs->verify(pkcs->context, signature, signature_len,
442 memset(hashr, 0, sizeof(hashr));
447 /* Encodes and returns SILC public key identifier. If some of the
448 arguments is NULL those are not encoded into the identifier string.
449 Protocol says that at least username and host must be provided. */
451 char *silc_pkcs_encode_identifier(char *username, char *host, char *realname,
452 char *email, char *org, char *country)
456 SilcUInt32 len, tlen = 0;
458 if (!username || !host)
461 len = (username ? strlen(username) : 0) +
462 (host ? strlen(host) : 0) +
463 (realname ? strlen(realname) : 0) +
464 (email ? strlen(email) : 0) +
465 (org ? strlen(org) : 0) +
466 (country ? strlen(country) : 0);
471 len += 3 + 5 + 5 + 4 + 4 + 4;
472 buf = silc_buffer_alloc(len);
473 silc_buffer_pull_tail(buf, len);
476 silc_buffer_format(buf,
477 SILC_STR_UI32_STRING("UN="),
478 SILC_STR_UI32_STRING(username),
480 silc_buffer_pull(buf, 3 + strlen(username));
481 tlen = 3 + strlen(username);
485 silc_buffer_format(buf,
486 SILC_STR_UI32_STRING(", "),
487 SILC_STR_UI32_STRING("HN="),
488 SILC_STR_UI32_STRING(host),
490 silc_buffer_pull(buf, 5 + strlen(host));
491 tlen += 5 + strlen(host);
495 silc_buffer_format(buf,
496 SILC_STR_UI32_STRING(", "),
497 SILC_STR_UI32_STRING("RN="),
498 SILC_STR_UI32_STRING(realname),
500 silc_buffer_pull(buf, 5 + strlen(realname));
501 tlen += 5 + strlen(realname);
505 silc_buffer_format(buf,
506 SILC_STR_UI32_STRING(", "),
507 SILC_STR_UI32_STRING("E="),
508 SILC_STR_UI32_STRING(email),
510 silc_buffer_pull(buf, 4 + strlen(email));
511 tlen += 4 + strlen(email);
515 silc_buffer_format(buf,
516 SILC_STR_UI32_STRING(", "),
517 SILC_STR_UI32_STRING("O="),
518 SILC_STR_UI32_STRING(org),
520 silc_buffer_pull(buf, 4 + strlen(org));
521 tlen += 4 + strlen(org);
525 silc_buffer_format(buf,
526 SILC_STR_UI32_STRING(", "),
527 SILC_STR_UI32_STRING("C="),
528 SILC_STR_UI32_STRING(country),
530 silc_buffer_pull(buf, 4 + strlen(country));
531 tlen += 4 + strlen(country);
534 silc_buffer_push(buf, buf->data - buf->head);
535 identifier = silc_calloc(tlen + 1, sizeof(*identifier));
536 memcpy(identifier, buf->data, tlen);
537 silc_buffer_free(buf);
542 /* Decodes the provided `identifier' and returns allocated context for
545 SilcPublicKeyIdentifier silc_pkcs_decode_identifier(char *identifier)
547 SilcPublicKeyIdentifier ident;
551 ident = silc_calloc(1, sizeof(*ident));
555 len = strcspn(cp, ",");
556 if (len - 1 >= 0 && cp[len - 1] == '\\') {
559 len = strcspn(cp, ",") + len;
560 if (len - 1 >= 0 && cp[len - 1] != '\\')
565 item = silc_calloc(len + 1, sizeof(char));
566 memcpy(item, cp, len);
568 if (strstr(item, "UN="))
569 ident->username = strdup(item + strcspn(cp, "=") + 1);
570 else if (strstr(item, "HN="))
571 ident->host = strdup(item + strcspn(cp, "=") + 1);
572 else if (strstr(item, "RN="))
573 ident->realname = strdup(item + strcspn(cp, "=") + 1);
574 else if (strstr(item, "E="))
575 ident->email = strdup(item + strcspn(cp, "=") + 1);
576 else if (strstr(item, "O="))
577 ident->org = strdup(item + strcspn(cp, "=") + 1);
578 else if (strstr(item, "C="))
579 ident->country = strdup(item + strcspn(cp, "=") + 1);
594 /* Free's decoded public key identifier context. Call this to free the
595 context returned by the silc_pkcs_decode_identifier. */
597 void silc_pkcs_free_identifier(SilcPublicKeyIdentifier identifier)
599 silc_free(identifier->username);
600 silc_free(identifier->host);
601 silc_free(identifier->realname);
602 silc_free(identifier->email);
603 silc_free(identifier->org);
604 silc_free(identifier->country);
605 silc_free(identifier);
608 /* Allocates SILC style public key formed from sent arguments. All data
611 SilcPublicKey silc_pkcs_public_key_alloc(const char *name,
612 const char *identifier,
613 const unsigned char *pk,
616 SilcPublicKey public_key;
619 public_key = silc_calloc(1, sizeof(*public_key));
620 public_key->name = strdup(name);
621 public_key->pk_len = pk_len;
622 public_key->pk = silc_calloc(pk_len, sizeof(*public_key->pk));
623 memcpy(public_key->pk, pk, pk_len);
625 if (!silc_utf8_valid(identifier, strlen(identifier))) {
626 int len = silc_utf8_encoded_len(identifier, strlen(identifier), 0);
627 tmp = silc_calloc(len + 1, sizeof(*tmp));
628 silc_utf8_encode(identifier, strlen(identifier), 0, tmp, len);
632 public_key->identifier = strdup(identifier);
633 public_key->len = 4 + 2 + strlen(name) + 2 + strlen(identifier) + pk_len;
639 /* Free's public key */
641 void silc_pkcs_public_key_free(SilcPublicKey public_key)
644 silc_free(public_key->name);
645 silc_free(public_key->identifier);
646 silc_free(public_key->pk);
647 silc_free(public_key);
651 /* Allocates SILC private key formed from sent arguments. All data is
654 SilcPrivateKey silc_pkcs_private_key_alloc(const char *name,
655 const unsigned char *prv,
658 SilcPrivateKey private_key;
660 private_key = silc_calloc(1, sizeof(*private_key));
661 private_key->name = strdup(name);
662 private_key->prv_len = prv_len;
663 private_key->prv = silc_calloc(prv_len, sizeof(*private_key->prv));
664 memcpy(private_key->prv, prv, prv_len);
669 /* Free's private key */
671 void silc_pkcs_private_key_free(SilcPrivateKey private_key)
674 silc_free(private_key->name);
675 silc_free(private_key->prv);
676 silc_free(private_key);
680 /* Encodes SILC style public key from SilcPublicKey. Returns the encoded
684 silc_pkcs_public_key_encode(SilcPublicKey public_key, SilcUInt32 *len)
689 buf = silc_buffer_alloc(public_key->len);
690 silc_buffer_pull_tail(buf, SILC_BUFFER_END(buf));
692 silc_buffer_format(buf,
693 SILC_STR_UI_INT(public_key->len),
694 SILC_STR_UI_SHORT(strlen(public_key->name)),
695 SILC_STR_UI32_STRING(public_key->name),
696 SILC_STR_UI_SHORT(strlen(public_key->identifier)),
697 SILC_STR_UI32_STRING(public_key->identifier),
698 SILC_STR_UI_XNSTRING(public_key->pk,
702 *len = public_key->len;
704 ret = silc_calloc(buf->len, sizeof(*ret));
705 memcpy(ret, buf->data, buf->len);
706 silc_buffer_free(buf);
711 /* Encodes SILC style public key. Returns the encoded data. */
714 silc_pkcs_public_key_data_encode(unsigned char *pk, SilcUInt32 pk_len,
715 char *pkcs, char *identifier,
722 totlen = 4 + 2 + strlen(pkcs) + 2 + strlen(identifier) + pk_len;
723 buf = silc_buffer_alloc(totlen);
724 silc_buffer_pull_tail(buf, SILC_BUFFER_END(buf));
726 silc_buffer_format(buf,
727 SILC_STR_UI_INT(totlen),
728 SILC_STR_UI_SHORT(strlen(pkcs)),
729 SILC_STR_UI32_STRING(pkcs),
730 SILC_STR_UI_SHORT(strlen(identifier)),
731 SILC_STR_UI32_STRING(identifier),
732 SILC_STR_UI_XNSTRING(pk, pk_len),
737 ret = silc_calloc(buf->len, sizeof(*ret));
738 memcpy(ret, buf->data, buf->len);
739 silc_buffer_free(buf);
744 /* Decodes SILC style public key. Returns TRUE if the decoding was
745 successful. Allocates new public key as well. */
747 int silc_pkcs_public_key_decode(unsigned char *data, SilcUInt32 data_len,
748 SilcPublicKey *public_key)
752 SilcUInt16 pkcs_len, identifier_len;
753 SilcUInt32 totlen, key_len;
754 unsigned char *pkcs_name = NULL, *ident = NULL, *key_data = NULL;
757 buf = silc_buffer_alloc(data_len);
758 silc_buffer_pull_tail(buf, SILC_BUFFER_END(buf));
759 silc_buffer_put(buf, data, data_len);
762 ret = silc_buffer_unformat(buf,
763 SILC_STR_UI_INT(&totlen),
766 silc_buffer_free(buf);
770 if (totlen != data_len) {
771 silc_buffer_free(buf);
775 /* Get algorithm name and identifier */
776 silc_buffer_pull(buf, 4);
778 silc_buffer_unformat(buf,
779 SILC_STR_UI16_NSTRING_ALLOC(&pkcs_name, &pkcs_len),
780 SILC_STR_UI16_NSTRING_ALLOC(&ident, &identifier_len),
785 if (pkcs_len < 1 || identifier_len < 3 ||
786 pkcs_len + identifier_len > totlen)
789 /* See if we support this algorithm (check only if PKCS are registered) */
790 if (SILC_PKCS_LIST && !silc_pkcs_is_supported(pkcs_name)) {
791 SILC_LOG_DEBUG(("Unknown PKCS %s", pkcs_name));
795 /* Protocol says that at least UN and HN must be provided as identifier,
797 if (!strstr(ident, "UN=") && !strstr(ident, "HN=")) {
798 SILC_LOG_DEBUG(("The public does not have the required UN= and HN= "
803 /* Get key data. We assume that rest of the buffer is key data. */
804 silc_buffer_pull(buf, 2 + pkcs_len + 2 + identifier_len);
806 ret = silc_buffer_unformat(buf,
807 SILC_STR_UI_XNSTRING_ALLOC(&key_data, key_len),
812 /* Try to set the key. If this fails the key must be malformed. This
813 code assumes that the PKCS routine checks the format of the key.
814 (check only if PKCS are registered) */
815 if (SILC_PKCS_LIST) {
816 silc_pkcs_alloc(pkcs_name, &alg);
817 if (!alg->pkcs->set_public_key(alg->context, key_data, key_len))
823 *public_key = silc_calloc(1, sizeof(**public_key));
824 (*public_key)->len = totlen;
825 (*public_key)->name = pkcs_name;
826 (*public_key)->identifier = ident;
827 (*public_key)->pk = key_data;
828 (*public_key)->pk_len = key_len;
831 silc_buffer_free(buf);
836 silc_free(pkcs_name);
841 silc_buffer_free(buf);
845 /* Compares two public keys and returns TRUE if they are same key, and
846 FALSE if they are not same. */
848 bool silc_pkcs_public_key_compare(SilcPublicKey key1, SilcPublicKey key2)
853 if (key1->len == key2->len &&
854 key1->name && key2->name && key1->identifier && key2->identifier &&
855 !strcmp(key1->name, key2->name) &&
856 !strcmp(key1->identifier, key2->identifier) &&
857 !memcmp(key1->pk, key2->pk, key1->pk_len) &&
858 key1->pk_len == key2->pk_len)
864 /* Copies the public key indicated by `public_key' and returns new allocated
865 public key which is indentical to the `public_key'. */
867 SilcPublicKey silc_pkcs_public_key_copy(SilcPublicKey public_key)
869 SilcPublicKey key = silc_calloc(1, sizeof(*key));
873 key->len = public_key->len;
874 key->name = silc_memdup(public_key->name, strlen(public_key->name));
875 key->identifier = silc_memdup(public_key->identifier,
876 strlen(public_key->identifier));
877 key->pk = silc_memdup(public_key->pk, public_key->pk_len);
878 key->pk_len = public_key->pk_len;
883 /* Encodes SILC private key from SilcPrivateKey. Returns the encoded data. */
886 silc_pkcs_private_key_encode(SilcPrivateKey private_key, SilcUInt32 *len)
892 totlen = 2 + strlen(private_key->name) + private_key->prv_len;
893 buf = silc_buffer_alloc(totlen);
894 silc_buffer_pull_tail(buf, SILC_BUFFER_END(buf));
896 silc_buffer_format(buf,
897 SILC_STR_UI_SHORT(strlen(private_key->name)),
898 SILC_STR_UI32_STRING(private_key->name),
899 SILC_STR_UI_XNSTRING(private_key->prv,
900 private_key->prv_len),
905 ret = silc_calloc(buf->len, sizeof(*ret));
906 memcpy(ret, buf->data, buf->len);
907 silc_buffer_free(buf);
912 /* Encodes SILC private key. Returns the encoded data. */
915 silc_pkcs_private_key_data_encode(unsigned char *prv, SilcUInt32 prv_len,
916 char *pkcs, SilcUInt32 *len)
922 totlen = 2 + strlen(pkcs) + prv_len;
923 buf = silc_buffer_alloc(totlen);
924 silc_buffer_pull_tail(buf, totlen);
926 silc_buffer_format(buf,
927 SILC_STR_UI_SHORT(strlen(pkcs)),
928 SILC_STR_UI32_STRING(pkcs),
929 SILC_STR_UI_XNSTRING(prv, prv_len),
934 ret = silc_calloc(buf->len, sizeof(*ret));
935 memcpy(ret, buf->data, buf->len);
936 silc_buffer_free(buf);
941 /* Decodes SILC style public key. Returns TRUE if the decoding was
942 successful. Allocates new private key as well. */
944 int silc_pkcs_private_key_decode(unsigned char *data, SilcUInt32 data_len,
945 SilcPrivateKey *private_key)
951 unsigned char *pkcs_name = NULL, *key_data = NULL;
954 buf = silc_buffer_alloc(data_len);
955 silc_buffer_pull_tail(buf, SILC_BUFFER_END(buf));
956 silc_buffer_put(buf, data, data_len);
958 /* Get algorithm name and identifier */
960 silc_buffer_unformat(buf,
961 SILC_STR_UI16_NSTRING_ALLOC(&pkcs_name, &pkcs_len),
966 if (pkcs_len < 1 || pkcs_len > buf->truelen)
969 /* See if we support this algorithm (check only if PKCS are registered). */
970 if (SILC_PKCS_LIST && !silc_pkcs_is_supported(pkcs_name)) {
971 SILC_LOG_DEBUG(("Unknown PKCS `%s'", pkcs_name));
975 /* Get key data. We assume that rest of the buffer is key data. */
976 silc_buffer_pull(buf, 2 + pkcs_len);
978 ret = silc_buffer_unformat(buf,
979 SILC_STR_UI_XNSTRING_ALLOC(&key_data, key_len),
984 /* Try to set the key. If this fails the key must be malformed. This
985 code assumes that the PKCS routine checks the format of the key.
986 (check only if PKCS are registered) */
987 if (SILC_PKCS_LIST) {
988 silc_pkcs_alloc(pkcs_name, &alg);
989 if (!alg->pkcs->set_private_key(alg->context, key_data, key_len))
995 *private_key = silc_calloc(1, sizeof(**private_key));
996 (*private_key)->name = pkcs_name;
997 (*private_key)->prv = key_data;
998 (*private_key)->prv_len = key_len;
1001 silc_buffer_free(buf);
1006 silc_free(pkcs_name);
1008 silc_free(key_data);
1009 silc_buffer_free(buf);
1013 /* Internal routine to save public key */
1015 static int silc_pkcs_save_public_key_internal(char *filename,
1016 unsigned char *data,
1017 SilcUInt32 data_len,
1018 SilcUInt32 encoding)
1024 case SILC_PKCS_FILE_BIN:
1026 case SILC_PKCS_FILE_PEM:
1027 data = silc_pem_encode_file(data, data_len);
1028 data_len = strlen(data);
1032 len = data_len + (strlen(SILC_PKCS_PUBLIC_KEYFILE_BEGIN) +
1033 strlen(SILC_PKCS_PUBLIC_KEYFILE_END));
1034 buf = silc_buffer_alloc(len);
1035 silc_buffer_pull_tail(buf, SILC_BUFFER_END(buf));
1037 silc_buffer_format(buf,
1038 SILC_STR_UI32_STRING(SILC_PKCS_PUBLIC_KEYFILE_BEGIN),
1039 SILC_STR_UI_XNSTRING(data, data_len),
1040 SILC_STR_UI32_STRING(SILC_PKCS_PUBLIC_KEYFILE_END),
1043 /* Save into file */
1044 if (silc_file_writefile(filename, buf->data, buf->len)) {
1045 silc_buffer_free(buf);
1049 silc_buffer_free(buf);
1053 /* Saves public key into file */
1055 int silc_pkcs_save_public_key(char *filename, SilcPublicKey public_key,
1056 SilcUInt32 encoding)
1058 unsigned char *data;
1059 SilcUInt32 data_len;
1061 data = silc_pkcs_public_key_encode(public_key, &data_len);
1062 return silc_pkcs_save_public_key_internal(filename, data, data_len,
1066 /* Saves public key into file */
1068 int silc_pkcs_save_public_key_data(char *filename, unsigned char *data,
1069 SilcUInt32 data_len,
1070 SilcUInt32 encoding)
1072 return silc_pkcs_save_public_key_internal(filename, data, data_len,
1076 /* Internal routine to save private key. */
1078 static int silc_pkcs_save_private_key_internal(char *filename,
1079 unsigned char *data,
1080 SilcUInt32 data_len,
1081 SilcUInt32 encoding)
1087 case SILC_PKCS_FILE_BIN:
1089 case SILC_PKCS_FILE_PEM:
1090 data = silc_pem_encode_file(data, data_len);
1091 data_len = strlen(data);
1095 len = data_len + (strlen(SILC_PKCS_PRIVATE_KEYFILE_BEGIN) +
1096 strlen(SILC_PKCS_PRIVATE_KEYFILE_END));
1097 buf = silc_buffer_alloc(len);
1098 silc_buffer_pull_tail(buf, SILC_BUFFER_END(buf));
1100 silc_buffer_format(buf,
1101 SILC_STR_UI32_STRING(SILC_PKCS_PRIVATE_KEYFILE_BEGIN),
1102 SILC_STR_UI_XNSTRING(data, data_len),
1103 SILC_STR_UI32_STRING(SILC_PKCS_PRIVATE_KEYFILE_END),
1106 /* Save into a file */
1107 if (silc_file_writefile_mode(filename, buf->data, buf->len, 0600)) {
1108 silc_buffer_free(buf);
1112 silc_buffer_free(buf);
1116 /* Saves private key into file. */
1117 /* XXX The buffer should be encrypted if passphrase is provided. */
1119 int silc_pkcs_save_private_key(char *filename, SilcPrivateKey private_key,
1120 unsigned char *passphrase,
1121 SilcUInt32 encoding)
1123 unsigned char *data;
1124 SilcUInt32 data_len;
1126 data = silc_pkcs_private_key_encode(private_key, &data_len);
1127 return silc_pkcs_save_private_key_internal(filename, data, data_len,
1131 /* Saves private key into file. */
1132 /* XXX The buffer should be encrypted if passphrase is provided. */
1134 int silc_pkcs_save_private_key_data(char *filename, unsigned char *data,
1135 SilcUInt32 data_len,
1136 unsigned char *passphrase,
1137 SilcUInt32 encoding)
1139 return silc_pkcs_save_private_key_internal(filename, data, data_len,
1143 /* Loads public key from file and allocates new public key. Returns TRUE
1144 is loading was successful. */
1146 int silc_pkcs_load_public_key(char *filename, SilcPublicKey *public_key,
1147 SilcUInt32 encoding)
1149 unsigned char *cp, *old, *data, byte;
1150 SilcUInt32 i, data_len, len;
1152 old = data = silc_file_readfile(filename, &data_len);
1156 /* Check start of file and remove header from the data. */
1157 len = strlen(SILC_PKCS_PUBLIC_KEYFILE_BEGIN);
1159 for (i = 0; i < len; i++) {
1162 if (byte != SILC_PKCS_PUBLIC_KEYFILE_BEGIN[i]) {
1163 memset(old, 0, data_len);
1170 /* Decode public key */
1172 len = data_len - (strlen(SILC_PKCS_PUBLIC_KEYFILE_BEGIN) +
1173 strlen(SILC_PKCS_PUBLIC_KEYFILE_END));
1176 case SILC_PKCS_FILE_BIN:
1178 case SILC_PKCS_FILE_PEM:
1179 data = silc_pem_decode(data, len, &len);
1180 memset(old, 0, data_len);
1187 if (!data || !silc_pkcs_public_key_decode(data, len, public_key)) {
1188 memset(old, 0, data_len);
1194 memset(old, 0, data_len);
1199 /* Load private key from file and allocates new private key. Returns TRUE
1200 if loading was successful. */
1201 /* XXX Should support encrypted private key files */
1203 int silc_pkcs_load_private_key(char *filename, SilcPrivateKey *private_key,
1204 SilcUInt32 encoding)
1206 unsigned char *cp, *old, *data, byte;
1207 SilcUInt32 i, data_len, len;
1209 old = data = silc_file_readfile(filename, &data_len);
1213 /* Check start of file and remove header from the data. */
1214 len = strlen(SILC_PKCS_PRIVATE_KEYFILE_BEGIN);
1216 for (i = 0; i < len; i++) {
1219 if (byte != SILC_PKCS_PRIVATE_KEYFILE_BEGIN[i]) {
1220 memset(old, 0, data_len);
1227 /* Decode private key */
1229 len = data_len - (strlen(SILC_PKCS_PRIVATE_KEYFILE_BEGIN) +
1230 strlen(SILC_PKCS_PRIVATE_KEYFILE_END));
1233 case SILC_PKCS_FILE_BIN:
1235 case SILC_PKCS_FILE_PEM:
1236 data = silc_pem_decode(data, len, &len);
1240 if (!data || !silc_pkcs_private_key_decode(data, len, private_key)) {
1241 memset(old, 0, data_len);
1247 memset(old, 0, data_len);