1 /**********************************************************************
3 * Copyright (c) 2005-2013 Cryptocom LTD *
4 * This file is distributed under the same license as OpenSSL *
6 * VK0 34.10-2001 key exchange and GOST R 34.10-2001 *
7 * based PKCS7/SMIME support *
8 * Requires OpenSSL 0.9.9 for compilation *
9 **********************************************************************/
10 #include <openssl/evp.h>
11 #include <openssl/err.h>
12 #include <openssl/rand.h>
14 #include <openssl/objects.h>
16 #include "e_gost_err.h"
17 #include "gost_keywrap.h"
20 /* Implementation of CryptoPro VKO 34.10-2001/2012 algorithm */
21 int VKO_compute_key(unsigned char *shared_key,
22 const EC_POINT *pub_key, const EC_KEY *priv_key,
23 const unsigned char *ukm, const size_t ukm_size,
24 const int vko_dgst_nid)
26 unsigned char *databuf = NULL;
27 BIGNUM *UKM = NULL, *p = NULL, *order = NULL, *X = NULL, *Y = NULL, *cofactor = NULL;
28 const BIGNUM *key = EC_KEY_get0_private_key(priv_key);
29 EC_POINT *pnt = EC_POINT_new(EC_KEY_get0_group(priv_key));
30 BN_CTX *ctx = BN_CTX_secure_new();
31 EVP_MD_CTX *mdctx = NULL;
32 const EVP_MD *md = NULL;
33 int buf_len, half_len;
37 GOSTerr(GOST_F_VKO_COMPUTE_KEY, ERR_R_MALLOC_FAILURE);
42 md = EVP_get_digestbynid(vko_dgst_nid);
44 GOSTerr(GOST_F_VKO_COMPUTE_KEY, GOST_R_INVALID_DIGEST_TYPE);
48 UKM = BN_lebin2bn(ukm, ukm_size, NULL);
50 order = BN_CTX_get(ctx);
51 cofactor = BN_CTX_get(ctx);
54 EC_GROUP_get_order(EC_KEY_get0_group(priv_key), order, ctx);
55 EC_GROUP_get_cofactor(EC_KEY_get0_group(priv_key), cofactor, ctx);
56 BN_mod_mul(UKM, UKM, cofactor, order, ctx);
57 BN_mod_mul(p, key, UKM, order, ctx);
58 if (!EC_POINT_mul(EC_KEY_get0_group(priv_key), pnt, NULL, pub_key, p, ctx)) {
59 GOSTerr(GOST_F_VKO_COMPUTE_KEY, GOST_R_ERROR_POINT_MUL);
62 if (!EC_POINT_get_affine_coordinates(EC_KEY_get0_group(priv_key),
64 GOSTerr(GOST_F_VKO_COMPUTE_KEY, ERR_R_EC_LIB);
68 half_len = BN_num_bytes(order);
69 buf_len = 2 * half_len;
70 databuf = OPENSSL_zalloc(buf_len);
72 GOSTerr(GOST_F_VKO_COMPUTE_KEY, ERR_R_MALLOC_FAILURE);
77 * Serialize elliptic curve point same way as we do it when saving key
79 store_bignum(Y, databuf, half_len);
80 store_bignum(X, databuf + half_len, half_len);
81 /* And reverse byte order of whole buffer */
82 BUF_reverse(databuf, NULL, buf_len);
84 mdctx = EVP_MD_CTX_new();
86 GOSTerr(GOST_F_VKO_COMPUTE_KEY, ERR_R_MALLOC_FAILURE);
90 if (EVP_MD_CTX_init(mdctx) == 0
91 || EVP_DigestInit_ex(mdctx, md, NULL) == 0
92 || EVP_DigestUpdate(mdctx, databuf, buf_len) == 0
93 || EVP_DigestFinal_ex(mdctx, shared_key, NULL) == 0) {
94 GOSTerr(GOST_F_VKO_COMPUTE_KEY, ERR_R_EVP_LIB);
98 ret = (EVP_MD_size(md) > 0) ? EVP_MD_size(md) : 0;
107 EVP_MD_CTX_free(mdctx);
109 OPENSSL_free(databuf);
115 * keyout expected to be 64 bytes
117 static int gost_keg(const unsigned char *ukm_source, int pkey_nid,
118 const EC_POINT *pub_key, const EC_KEY *priv_key,
119 unsigned char *keyout)
122 unsigned char real_ukm[16];
125 memset(real_ukm, 0, 16);
126 if (memcmp(ukm_source, real_ukm, 16) == 0)
129 memcpy(real_ukm, ukm_source, 16);
130 BUF_reverse(real_ukm, NULL, 16);
134 case NID_id_GostR3410_2012_512:
136 VKO_compute_key(keyout, pub_key, priv_key, real_ukm, 16,
137 NID_id_GostR3411_2012_512);
138 return (keylen) ? keylen : 0;
141 case NID_id_GostR3410_2012_256:
143 unsigned char tmpkey[32];
145 VKO_compute_key(tmpkey, pub_key, priv_key, real_ukm, 16,
146 NID_id_GostR3411_2012_256);
151 if (gost_kdftree2012_256
152 (keyout, 64, tmpkey, 32, (const unsigned char *)"kdf tree", 8,
153 ukm_source + 16, 8, 1) > 0)
158 OPENSSL_cleanse(tmpkey, 32);
159 return (keylen) ? keylen : 0;
167 * EVP_PKEY_METHOD callback derive.
168 * Implements VKO R 34.10-2001/2012 algorithms
170 int pkey_gost_ec_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen)
173 * Public key of peer in the ctx field peerkey
174 * Our private key in the ctx pkey
175 * ukm is in the algorithm specific context data
177 EVP_PKEY *my_key = EVP_PKEY_CTX_get0_pkey(ctx);
178 EVP_PKEY *peer_key = EVP_PKEY_CTX_get0_peerkey(ctx);
179 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
180 int dgst_nid = NID_undef;
182 if (!data || !data->shared_ukm) {
183 GOSTerr(GOST_F_PKEY_GOST_EC_DERIVE, GOST_R_UKM_NOT_SET);
187 * shared_ukm_size = 8 stands for pre-2018 cipher suites
188 * It means 32 bytes of key length, 8 byte UKM, 32-bytes hash
190 * shared_ukm_size = 32 stands for pre-2018 cipher suites
191 * It means 64 bytes of shared_key, 16 bytes of UKM and either
192 * 64 bytes of hash or 64 bytes of TLSTREE output
195 switch (data->shared_ukm_size) {
203 EVP_PKEY_get_default_digest_nid(my_key, &dgst_nid);
204 if (dgst_nid == NID_id_GostR3411_2012_512)
205 dgst_nid = NID_id_GostR3411_2012_256;
209 EC_KEY_get0_public_key(EVP_PKEY_get0(peer_key)),
210 (EC_KEY *)EVP_PKEY_get0(my_key),
211 data->shared_ukm, 8, dgst_nid);
212 return (*keylen) ? 1 : 0;
222 *keylen = gost_keg(data->shared_ukm, EVP_PKEY_id(my_key),
223 EC_KEY_get0_public_key(EVP_PKEY_get0(peer_key)),
224 (EC_KEY *)EVP_PKEY_get0(my_key), key);
225 return (*keylen) ? 1 : 0;
235 * Generates ephemeral key based on pubk algorithm computes shared key using
236 * VKO and returns filled up GOST_KEY_TRANSPORT structure
240 * EVP_PKEY_METHOD callback encrypt
241 * Implementation of GOST2001/12 key transport, cryptopro variation
244 static int pkey_GOST_ECcp_encrypt(EVP_PKEY_CTX *pctx, unsigned char *out,
245 size_t *out_len, const unsigned char *key,
248 GOST_KEY_TRANSPORT *gkt = NULL;
249 EVP_PKEY *pubk = EVP_PKEY_CTX_get0_pkey(pctx);
250 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(pctx);
251 int pkey_nid = EVP_PKEY_base_id(pubk);
252 ASN1_OBJECT *crypt_params_obj = (pkey_nid == NID_id_GostR3410_2001) ?
253 OBJ_nid2obj(NID_id_Gost28147_89_CryptoPro_A_ParamSet) :
254 OBJ_nid2obj(NID_id_tc26_gost_28147_param_Z);
255 const struct gost_cipher_info *param =
256 get_encryption_params(crypt_params_obj);
257 unsigned char ukm[8], shared_key[32], crypted_key[44];
259 int key_is_ephemeral = 1;
261 EVP_PKEY *sec_key = EVP_PKEY_CTX_get0_peerkey(pctx);
262 if (data->shared_ukm) {
263 memcpy(ukm, data->shared_ukm, 8);
265 if (RAND_bytes(ukm, 8) <= 0) {
266 GOSTerr(GOST_F_PKEY_GOST_ECCP_ENCRYPT, GOST_R_RNG_ERROR);
272 /* Check for private key in the peer_key of context */
274 key_is_ephemeral = 0;
275 if (!gost_get0_priv_key(sec_key)) {
276 GOSTerr(GOST_F_PKEY_GOST_ECCP_ENCRYPT,
277 GOST_R_NO_PRIVATE_PART_OF_NON_EPHEMERAL_KEYPAIR);
281 key_is_ephemeral = 1;
283 sec_key = EVP_PKEY_new();
284 if (!EVP_PKEY_assign(sec_key, EVP_PKEY_base_id(pubk), EC_KEY_new())
285 || !EVP_PKEY_copy_parameters(sec_key, pubk)
286 || !gost_ec_keygen(EVP_PKEY_get0(sec_key))) {
287 GOSTerr(GOST_F_PKEY_GOST_ECCP_ENCRYPT,
288 GOST_R_ERROR_COMPUTING_SHARED_KEY);
294 int dgst_nid = NID_undef;
295 EVP_PKEY_get_default_digest_nid(pubk, &dgst_nid);
296 if (dgst_nid == NID_id_GostR3411_2012_512)
297 dgst_nid = NID_id_GostR3411_2012_256;
299 if (!VKO_compute_key(shared_key,
300 EC_KEY_get0_public_key(EVP_PKEY_get0(pubk)),
301 EVP_PKEY_get0(sec_key), ukm, 8, dgst_nid)) {
302 GOSTerr(GOST_F_PKEY_GOST_ECCP_ENCRYPT,
303 GOST_R_ERROR_COMPUTING_SHARED_KEY);
306 gost_init(&cctx, param->sblock);
307 keyWrapCryptoPro(&cctx, shared_key, ukm, key, crypted_key);
309 gkt = GOST_KEY_TRANSPORT_new();
313 if (!ASN1_OCTET_STRING_set(gkt->key_agreement_info->eph_iv, ukm, 8)) {
316 if (!ASN1_OCTET_STRING_set(gkt->key_info->imit, crypted_key + 40, 4)) {
319 if (!ASN1_OCTET_STRING_set
320 (gkt->key_info->encrypted_key, crypted_key + 8, 32)) {
323 if (key_is_ephemeral) {
325 (&gkt->key_agreement_info->ephem_key, out ? sec_key : pubk)) {
326 GOSTerr(GOST_F_PKEY_GOST_ECCP_ENCRYPT,
327 GOST_R_CANNOT_PACK_EPHEMERAL_KEY);
331 ASN1_OBJECT_free(gkt->key_agreement_info->cipher);
332 gkt->key_agreement_info->cipher = OBJ_nid2obj(param->nid);
333 if (key_is_ephemeral)
334 EVP_PKEY_free(sec_key);
335 if (!key_is_ephemeral) {
336 /* Set control "public key from client certificate used" */
337 if (EVP_PKEY_CTX_ctrl(pctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 3, NULL)
339 GOSTerr(GOST_F_PKEY_GOST_ECCP_ENCRYPT, GOST_R_CTRL_CALL_FAILED);
343 if ((*out_len = i2d_GOST_KEY_TRANSPORT(gkt, out ? &out : NULL)) > 0)
345 OPENSSL_cleanse(shared_key, sizeof(shared_key));
346 GOST_KEY_TRANSPORT_free(gkt);
349 OPENSSL_cleanse(shared_key, sizeof(shared_key));
350 if (key_is_ephemeral)
351 EVP_PKEY_free(sec_key);
352 GOST_KEY_TRANSPORT_free(gkt);
357 * EVP_PKEY_METHOD callback decrypt
358 * Implementation of GOST2018 key transport
360 static int pkey_gost2018_encrypt(EVP_PKEY_CTX *pctx, unsigned char *out,
361 size_t *out_len, const unsigned char *key,
364 PSKeyTransport_gost *pst = NULL;
365 EVP_PKEY *pubk = EVP_PKEY_CTX_get0_pkey(pctx);
366 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(pctx);
367 int pkey_nid = EVP_PKEY_base_id(pubk);
368 unsigned char expkeys[64];
369 EVP_PKEY *sec_key = NULL;
371 int mac_nid = NID_undef;
373 int exp_len = 0, iv_len = 0;
374 unsigned char *exp_buf = NULL;
375 int key_is_ephemeral = 0;
377 switch (data->cipher_nid) {
379 mac_nid = NID_magma_mac;
383 case NID_grasshopper_ctr:
384 mac_nid = NID_grasshopper_mac;
389 GOSTerr(GOST_F_PKEY_GOST2018_ENCRYPT, GOST_R_INVALID_CIPHER);
393 exp_len = key_len + mac_len;
394 exp_buf = OPENSSL_malloc(exp_len);
396 GOSTerr(GOST_F_PKEY_GOST2018_ENCRYPT, ERR_R_MALLOC_FAILURE);
400 sec_key = EVP_PKEY_CTX_get0_peerkey(pctx);
403 sec_key = EVP_PKEY_new();
404 if (sec_key == NULL) {
405 GOSTerr(GOST_F_PKEY_GOST2018_ENCRYPT, ERR_R_MALLOC_FAILURE );
409 if (!EVP_PKEY_assign(sec_key, EVP_PKEY_base_id(pubk), EC_KEY_new())
410 || !EVP_PKEY_copy_parameters(sec_key, pubk)
411 || !gost_ec_keygen(EVP_PKEY_get0(sec_key))) {
412 GOSTerr(GOST_F_PKEY_GOST2018_ENCRYPT,
413 GOST_R_ERROR_COMPUTING_SHARED_KEY);
416 key_is_ephemeral = 1;
419 if (gost_keg(data->shared_ukm, pkey_nid,
420 EC_KEY_get0_public_key(EVP_PKEY_get0(pubk)),
421 EVP_PKEY_get0(sec_key), expkeys) <= 0) {
422 GOSTerr(GOST_F_PKEY_GOST2018_ENCRYPT,
423 GOST_R_ERROR_COMPUTING_EXPORT_KEYS);
427 if (gost_kexp15(key, key_len, data->cipher_nid, expkeys + 32,
428 mac_nid, expkeys + 0, data->shared_ukm + 24, iv_len,
429 exp_buf, &exp_len) <= 0) {
430 GOSTerr(GOST_F_PKEY_GOST2018_ENCRYPT, GOST_R_CANNOT_PACK_EPHEMERAL_KEY);
434 pst = PSKeyTransport_gost_new();
436 GOSTerr(GOST_F_PKEY_GOST2018_ENCRYPT, ERR_R_MALLOC_FAILURE);
440 if (!ASN1_OCTET_STRING_set(pst->psexp, exp_buf, exp_len)) {
441 GOSTerr(GOST_F_PKEY_GOST2018_ENCRYPT, ERR_R_MALLOC_FAILURE);
445 if (!X509_PUBKEY_set(&pst->ephem_key, out ? sec_key : pubk)) {
446 GOSTerr(GOST_F_PKEY_GOST2018_ENCRYPT, GOST_R_CANNOT_PACK_EPHEMERAL_KEY);
450 if ((*out_len = i2d_PSKeyTransport_gost(pst, out ? &out : NULL)) > 0)
453 OPENSSL_cleanse(expkeys, sizeof(expkeys));
454 if (key_is_ephemeral)
455 EVP_PKEY_free(sec_key);
457 PSKeyTransport_gost_free(pst);
458 OPENSSL_free(exp_buf);
462 int pkey_gost_encrypt(EVP_PKEY_CTX *pctx, unsigned char *out,
463 size_t *out_len, const unsigned char *key, size_t key_len)
465 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(pctx);
466 if (data->shared_ukm == NULL || data->shared_ukm_size == 8)
467 return pkey_GOST_ECcp_encrypt(pctx, out, out_len, key, key_len);
468 else if (data->shared_ukm_size == 32)
469 return pkey_gost2018_encrypt(pctx, out, out_len, key, key_len);
471 GOSTerr(GOST_F_PKEY_GOST_ENCRYPT, ERR_R_INTERNAL_ERROR);
477 * EVP_PKEY_METHOD callback decrypt
478 * Implementation of GOST2001/12 key transport, cryptopro variation
480 static int pkey_GOST_ECcp_decrypt(EVP_PKEY_CTX *pctx, unsigned char *key,
481 size_t *key_len, const unsigned char *in,
484 const unsigned char *p = in;
485 EVP_PKEY *priv = EVP_PKEY_CTX_get0_pkey(pctx);
486 GOST_KEY_TRANSPORT *gkt = NULL;
488 unsigned char wrappedKey[44];
489 unsigned char sharedKey[32];
491 const struct gost_cipher_info *param = NULL;
492 EVP_PKEY *eph_key = NULL, *peerkey = NULL;
493 int dgst_nid = NID_undef;
499 gkt = d2i_GOST_KEY_TRANSPORT(NULL, (const unsigned char **)&p, in_len);
501 GOSTerr(GOST_F_PKEY_GOST_ECCP_DECRYPT,
502 GOST_R_ERROR_PARSING_KEY_TRANSPORT_INFO);
506 /* If key transport structure contains public key, use it */
507 eph_key = X509_PUBKEY_get(gkt->key_agreement_info->ephem_key);
509 if (EVP_PKEY_derive_set_peer(pctx, eph_key) <= 0) {
510 GOSTerr(GOST_F_PKEY_GOST_ECCP_DECRYPT,
511 GOST_R_INCOMPATIBLE_PEER_KEY);
515 /* Set control "public key from client certificate used" */
516 if (EVP_PKEY_CTX_ctrl(pctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 3, NULL)
518 GOSTerr(GOST_F_PKEY_GOST_ECCP_DECRYPT, GOST_R_CTRL_CALL_FAILED);
522 peerkey = EVP_PKEY_CTX_get0_peerkey(pctx);
524 GOSTerr(GOST_F_PKEY_GOST_ECCP_DECRYPT, GOST_R_NO_PEER_KEY);
528 param = get_encryption_params(gkt->key_agreement_info->cipher);
533 gost_init(&ctx, param->sblock);
534 OPENSSL_assert(gkt->key_agreement_info->eph_iv->length == 8);
535 memcpy(wrappedKey, gkt->key_agreement_info->eph_iv->data, 8);
536 OPENSSL_assert(gkt->key_info->encrypted_key->length == 32);
537 memcpy(wrappedKey + 8, gkt->key_info->encrypted_key->data, 32);
538 OPENSSL_assert(gkt->key_info->imit->length == 4);
539 memcpy(wrappedKey + 40, gkt->key_info->imit->data, 4);
541 EVP_PKEY_get_default_digest_nid(priv, &dgst_nid);
542 if (dgst_nid == NID_id_GostR3411_2012_512)
543 dgst_nid = NID_id_GostR3411_2012_256;
545 if (!VKO_compute_key(sharedKey,
546 EC_KEY_get0_public_key(EVP_PKEY_get0(peerkey)),
547 EVP_PKEY_get0(priv), wrappedKey, 8, dgst_nid)) {
548 GOSTerr(GOST_F_PKEY_GOST_ECCP_DECRYPT,
549 GOST_R_ERROR_COMPUTING_SHARED_KEY);
552 if (!keyUnwrapCryptoPro(&ctx, sharedKey, wrappedKey, key)) {
553 GOSTerr(GOST_F_PKEY_GOST_ECCP_DECRYPT,
554 GOST_R_ERROR_COMPUTING_SHARED_KEY);
560 OPENSSL_cleanse(sharedKey, sizeof(sharedKey));
561 EVP_PKEY_free(eph_key);
562 GOST_KEY_TRANSPORT_free(gkt);
567 * EVP_PKEY_METHOD callback decrypt
568 * Implementation of GOST2018 key transport
570 static int pkey_gost2018_decrypt(EVP_PKEY_CTX *pctx, unsigned char *key,
571 size_t *key_len, const unsigned char *in,
574 const unsigned char *p = in;
575 struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(pctx);
576 EVP_PKEY *priv = EVP_PKEY_CTX_get0_pkey(pctx);
577 PSKeyTransport_gost *pst = NULL;
579 unsigned char expkeys[64];
580 EVP_PKEY *eph_key = NULL;
581 int pkey_nid = EVP_PKEY_base_id(priv);
582 int mac_nid = NID_undef;
585 switch (data->cipher_nid) {
587 mac_nid = NID_magma_mac;
590 case NID_grasshopper_ctr:
591 mac_nid = NID_grasshopper_mac;
595 GOSTerr(GOST_F_PKEY_GOST2018_DECRYPT, GOST_R_INVALID_CIPHER);
604 pst = d2i_PSKeyTransport_gost(NULL, (const unsigned char **)&p, in_len);
606 GOSTerr(GOST_F_PKEY_GOST2018_DECRYPT,
607 GOST_R_ERROR_PARSING_KEY_TRANSPORT_INFO);
611 eph_key = X509_PUBKEY_get(pst->ephem_key);
614 1. Checks the next three conditions fulfilling and terminates the
615 connection with fatal error if not.
617 o Q_eph is on the same curve as server public key;
619 o Q_eph is not equal to zero point;
621 o q * Q_eph is not equal to zero point.
623 if (data->shared_ukm == NULL && pst->ukm != NULL) {
624 if (EVP_PKEY_CTX_ctrl(pctx, -1, -1, EVP_PKEY_CTRL_SET_IV,
625 ASN1_STRING_length(pst->ukm), (void *)ASN1_STRING_get0_data(pst->ukm)) < 0) {
626 GOSTerr(GOST_F_PKEY_GOST2018_DECRYPT, GOST_R_UKM_NOT_SET);
631 if (data->shared_ukm == NULL) {
632 GOSTerr(GOST_F_PKEY_GOST2018_DECRYPT, GOST_R_UKM_NOT_SET);
636 if (gost_keg(data->shared_ukm, pkey_nid,
637 EC_KEY_get0_public_key(EVP_PKEY_get0(eph_key)),
638 EVP_PKEY_get0(priv), expkeys) <= 0) {
639 GOSTerr(GOST_F_PKEY_GOST2018_DECRYPT,
640 GOST_R_ERROR_COMPUTING_EXPORT_KEYS);
644 if (gost_kimp15(ASN1_STRING_get0_data(pst->psexp),
645 ASN1_STRING_length(pst->psexp), data->cipher_nid,
646 expkeys + 32, mac_nid, expkeys + 0, data->shared_ukm + 24,
648 GOSTerr(GOST_F_PKEY_GOST2018_DECRYPT, GOST_R_CANNOT_UNPACK_EPHEMERAL_KEY);
654 OPENSSL_cleanse(expkeys, sizeof(expkeys));
655 EVP_PKEY_free(eph_key);
656 PSKeyTransport_gost_free(pst);
660 int pkey_gost_decrypt(EVP_PKEY_CTX *pctx, unsigned char *key,
661 size_t *key_len, const unsigned char *in, size_t in_len)
663 struct gost_pmeth_data *gctx = EVP_PKEY_CTX_get_data(pctx);
665 if (data->shared_ukm == NULL || data->shared_ukm_size == 8)
666 return pkey_GOST_ECcp_decrypt(pctx, key, key_len, in, in_len);
667 else if (data->shared_ukm_size == 32)
668 return pkey_gost2018_decrypt(pctx, key, key_len, in, in_len);
670 GOSTerr(GOST_F_PKEY_GOST_DECRYPT, ERR_R_INTERNAL_ERROR);
674 switch (gctx->cipher_nid)
676 case NID_id_Gost28147_89:
677 case NID_undef: /* FIXME */
678 return pkey_GOST_ECcp_decrypt(pctx, key, key_len, in, in_len);
679 case NID_kuznyechik_ctr:
681 return pkey_gost2018_decrypt(pctx, key, key_len, in, in_len);
683 GOSTerr(GOST_F_PKEY_GOST_DECRYPT, ERR_R_INTERNAL_ERROR);