1 /*
2 * Copyright 2017-2022 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <stdlib.h>
11 #include <stdarg.h>
12 #include <string.h>
13 #include <openssl/evp.h>
14 #include <openssl/kdf.h>
15 #include <openssl/err.h>
16 #include <openssl/core_names.h>
17 #include <openssl/proverr.h>
18 #include "crypto/evp.h"
19 #include "internal/numbers.h"
20 #include "prov/implementations.h"
21 #include "prov/provider_ctx.h"
22 #include "prov/providercommon.h"
23 #include "prov/provider_util.h"
24
25 #ifndef OPENSSL_NO_SCRYPT
26
27 static OSSL_FUNC_kdf_newctx_fn kdf_scrypt_new;
28 static OSSL_FUNC_kdf_dupctx_fn kdf_scrypt_dup;
29 static OSSL_FUNC_kdf_freectx_fn kdf_scrypt_free;
30 static OSSL_FUNC_kdf_reset_fn kdf_scrypt_reset;
31 static OSSL_FUNC_kdf_derive_fn kdf_scrypt_derive;
32 static OSSL_FUNC_kdf_settable_ctx_params_fn kdf_scrypt_settable_ctx_params;
33 static OSSL_FUNC_kdf_set_ctx_params_fn kdf_scrypt_set_ctx_params;
34 static OSSL_FUNC_kdf_gettable_ctx_params_fn kdf_scrypt_gettable_ctx_params;
35 static OSSL_FUNC_kdf_get_ctx_params_fn kdf_scrypt_get_ctx_params;
36
37 static int scrypt_alg(const char *pass, size_t passlen,
38 const unsigned char *salt, size_t saltlen,
39 uint64_t N, uint64_t r, uint64_t p, uint64_t maxmem,
40 unsigned char *key, size_t keylen, EVP_MD *sha256,
41 OSSL_LIB_CTX *libctx, const char *propq);
42
43 typedef struct {
44 OSSL_LIB_CTX *libctx;
45 char *propq;
46 unsigned char *pass;
47 size_t pass_len;
48 unsigned char *salt;
49 size_t salt_len;
50 uint64_t N;
51 uint64_t r, p;
52 uint64_t maxmem_bytes;
53 EVP_MD *sha256;
54 } KDF_SCRYPT;
55
56 static void kdf_scrypt_init(KDF_SCRYPT *ctx);
57
kdf_scrypt_new_inner(OSSL_LIB_CTX * libctx)58 static void *kdf_scrypt_new_inner(OSSL_LIB_CTX *libctx)
59 {
60 KDF_SCRYPT *ctx;
61
62 if (!ossl_prov_is_running())
63 return NULL;
64
65 ctx = OPENSSL_zalloc(sizeof(*ctx));
66 if (ctx == NULL) {
67 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
68 return NULL;
69 }
70 ctx->libctx = libctx;
71 kdf_scrypt_init(ctx);
72 return ctx;
73 }
74
kdf_scrypt_new(void * provctx)75 static void *kdf_scrypt_new(void *provctx)
76 {
77 return kdf_scrypt_new_inner(PROV_LIBCTX_OF(provctx));
78 }
79
kdf_scrypt_free(void * vctx)80 static void kdf_scrypt_free(void *vctx)
81 {
82 KDF_SCRYPT *ctx = (KDF_SCRYPT *)vctx;
83
84 if (ctx != NULL) {
85 OPENSSL_free(ctx->propq);
86 EVP_MD_free(ctx->sha256);
87 kdf_scrypt_reset(ctx);
88 OPENSSL_free(ctx);
89 }
90 }
91
kdf_scrypt_reset(void * vctx)92 static void kdf_scrypt_reset(void *vctx)
93 {
94 KDF_SCRYPT *ctx = (KDF_SCRYPT *)vctx;
95
96 OPENSSL_free(ctx->salt);
97 OPENSSL_clear_free(ctx->pass, ctx->pass_len);
98 kdf_scrypt_init(ctx);
99 }
100
kdf_scrypt_dup(void * vctx)101 static void *kdf_scrypt_dup(void *vctx)
102 {
103 const KDF_SCRYPT *src = (const KDF_SCRYPT *)vctx;
104 KDF_SCRYPT *dest;
105
106 dest = kdf_scrypt_new_inner(src->libctx);
107 if (dest != NULL) {
108 if (src->sha256 != NULL && !EVP_MD_up_ref(src->sha256))
109 goto err;
110 if (src->propq != NULL) {
111 dest->propq = OPENSSL_strdup(src->propq);
112 if (dest->propq == NULL)
113 goto err;
114 }
115 if (!ossl_prov_memdup(src->salt, src->salt_len,
116 &dest->salt, &dest->salt_len)
117 || !ossl_prov_memdup(src->pass, src->pass_len,
118 &dest->pass , &dest->pass_len))
119 goto err;
120 dest->N = src->N;
121 dest->r = src->r;
122 dest->p = src->p;
123 dest->maxmem_bytes = src->maxmem_bytes;
124 dest->sha256 = src->sha256;
125 }
126 return dest;
127
128 err:
129 kdf_scrypt_free(dest);
130 return NULL;
131 }
132
kdf_scrypt_init(KDF_SCRYPT * ctx)133 static void kdf_scrypt_init(KDF_SCRYPT *ctx)
134 {
135 /* Default values are the most conservative recommendation given in the
136 * original paper of C. Percival. Derivation uses roughly 1 GiB of memory
137 * for this parameter choice (approx. 128 * r * N * p bytes).
138 */
139 ctx->N = 1 << 20;
140 ctx->r = 8;
141 ctx->p = 1;
142 ctx->maxmem_bytes = 1025 * 1024 * 1024;
143 }
144
scrypt_set_membuf(unsigned char ** buffer,size_t * buflen,const OSSL_PARAM * p)145 static int scrypt_set_membuf(unsigned char **buffer, size_t *buflen,
146 const OSSL_PARAM *p)
147 {
148 OPENSSL_clear_free(*buffer, *buflen);
149 *buffer = NULL;
150 *buflen = 0;
151
152 if (p->data_size == 0) {
153 if ((*buffer = OPENSSL_malloc(1)) == NULL) {
154 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
155 return 0;
156 }
157 } else if (p->data != NULL) {
158 if (!OSSL_PARAM_get_octet_string(p, (void **)buffer, 0, buflen))
159 return 0;
160 }
161 return 1;
162 }
163
set_digest(KDF_SCRYPT * ctx)164 static int set_digest(KDF_SCRYPT *ctx)
165 {
166 EVP_MD_free(ctx->sha256);
167 ctx->sha256 = EVP_MD_fetch(ctx->libctx, "sha256", ctx->propq);
168 if (ctx->sha256 == NULL) {
169 OPENSSL_free(ctx);
170 ERR_raise(ERR_LIB_PROV, PROV_R_UNABLE_TO_LOAD_SHA256);
171 return 0;
172 }
173 return 1;
174 }
175
set_property_query(KDF_SCRYPT * ctx,const char * propq)176 static int set_property_query(KDF_SCRYPT *ctx, const char *propq)
177 {
178 OPENSSL_free(ctx->propq);
179 ctx->propq = NULL;
180 if (propq != NULL) {
181 ctx->propq = OPENSSL_strdup(propq);
182 if (ctx->propq == NULL) {
183 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
184 return 0;
185 }
186 }
187 return 1;
188 }
189
kdf_scrypt_derive(void * vctx,unsigned char * key,size_t keylen,const OSSL_PARAM params[])190 static int kdf_scrypt_derive(void *vctx, unsigned char *key, size_t keylen,
191 const OSSL_PARAM params[])
192 {
193 KDF_SCRYPT *ctx = (KDF_SCRYPT *)vctx;
194
195 if (!ossl_prov_is_running() || !kdf_scrypt_set_ctx_params(ctx, params))
196 return 0;
197
198 if (ctx->pass == NULL) {
199 ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_PASS);
200 return 0;
201 }
202
203 if (ctx->salt == NULL) {
204 ERR_raise(ERR_LIB_PROV, PROV_R_MISSING_SALT);
205 return 0;
206 }
207
208 if (ctx->sha256 == NULL && !set_digest(ctx))
209 return 0;
210
211 return scrypt_alg((char *)ctx->pass, ctx->pass_len, ctx->salt,
212 ctx->salt_len, ctx->N, ctx->r, ctx->p,
213 ctx->maxmem_bytes, key, keylen, ctx->sha256,
214 ctx->libctx, ctx->propq);
215 }
216
is_power_of_two(uint64_t value)217 static int is_power_of_two(uint64_t value)
218 {
219 return (value != 0) && ((value & (value - 1)) == 0);
220 }
221
kdf_scrypt_set_ctx_params(void * vctx,const OSSL_PARAM params[])222 static int kdf_scrypt_set_ctx_params(void *vctx, const OSSL_PARAM params[])
223 {
224 const OSSL_PARAM *p;
225 KDF_SCRYPT *ctx = vctx;
226 uint64_t u64_value;
227
228 if (params == NULL)
229 return 1;
230
231 if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_PASSWORD)) != NULL)
232 if (!scrypt_set_membuf(&ctx->pass, &ctx->pass_len, p))
233 return 0;
234
235 if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_SALT)) != NULL)
236 if (!scrypt_set_membuf(&ctx->salt, &ctx->salt_len, p))
237 return 0;
238
239 if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_SCRYPT_N))
240 != NULL) {
241 if (!OSSL_PARAM_get_uint64(p, &u64_value)
242 || u64_value <= 1
243 || !is_power_of_two(u64_value))
244 return 0;
245 ctx->N = u64_value;
246 }
247
248 if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_SCRYPT_R))
249 != NULL) {
250 if (!OSSL_PARAM_get_uint64(p, &u64_value) || u64_value < 1)
251 return 0;
252 ctx->r = u64_value;
253 }
254
255 if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_SCRYPT_P))
256 != NULL) {
257 if (!OSSL_PARAM_get_uint64(p, &u64_value) || u64_value < 1)
258 return 0;
259 ctx->p = u64_value;
260 }
261
262 if ((p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_SCRYPT_MAXMEM))
263 != NULL) {
264 if (!OSSL_PARAM_get_uint64(p, &u64_value) || u64_value < 1)
265 return 0;
266 ctx->maxmem_bytes = u64_value;
267 }
268
269 p = OSSL_PARAM_locate_const(params, OSSL_KDF_PARAM_PROPERTIES);
270 if (p != NULL) {
271 if (p->data_type != OSSL_PARAM_UTF8_STRING
272 || !set_property_query(ctx, p->data)
273 || !set_digest(ctx))
274 return 0;
275 }
276 return 1;
277 }
278
kdf_scrypt_settable_ctx_params(ossl_unused void * ctx,ossl_unused void * p_ctx)279 static const OSSL_PARAM *kdf_scrypt_settable_ctx_params(ossl_unused void *ctx,
280 ossl_unused void *p_ctx)
281 {
282 static const OSSL_PARAM known_settable_ctx_params[] = {
283 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_PASSWORD, NULL, 0),
284 OSSL_PARAM_octet_string(OSSL_KDF_PARAM_SALT, NULL, 0),
285 OSSL_PARAM_uint64(OSSL_KDF_PARAM_SCRYPT_N, NULL),
286 OSSL_PARAM_uint32(OSSL_KDF_PARAM_SCRYPT_R, NULL),
287 OSSL_PARAM_uint32(OSSL_KDF_PARAM_SCRYPT_P, NULL),
288 OSSL_PARAM_uint64(OSSL_KDF_PARAM_SCRYPT_MAXMEM, NULL),
289 OSSL_PARAM_utf8_string(OSSL_KDF_PARAM_PROPERTIES, NULL, 0),
290 OSSL_PARAM_END
291 };
292 return known_settable_ctx_params;
293 }
294
kdf_scrypt_get_ctx_params(void * vctx,OSSL_PARAM params[])295 static int kdf_scrypt_get_ctx_params(void *vctx, OSSL_PARAM params[])
296 {
297 OSSL_PARAM *p;
298
299 if ((p = OSSL_PARAM_locate(params, OSSL_KDF_PARAM_SIZE)) != NULL)
300 return OSSL_PARAM_set_size_t(p, SIZE_MAX);
301 return -2;
302 }
303
kdf_scrypt_gettable_ctx_params(ossl_unused void * ctx,ossl_unused void * p_ctx)304 static const OSSL_PARAM *kdf_scrypt_gettable_ctx_params(ossl_unused void *ctx,
305 ossl_unused void *p_ctx)
306 {
307 static const OSSL_PARAM known_gettable_ctx_params[] = {
308 OSSL_PARAM_size_t(OSSL_KDF_PARAM_SIZE, NULL),
309 OSSL_PARAM_END
310 };
311 return known_gettable_ctx_params;
312 }
313
314 const OSSL_DISPATCH ossl_kdf_scrypt_functions[] = {
315 { OSSL_FUNC_KDF_NEWCTX, (void(*)(void))kdf_scrypt_new },
316 { OSSL_FUNC_KDF_DUPCTX, (void(*)(void))kdf_scrypt_dup },
317 { OSSL_FUNC_KDF_FREECTX, (void(*)(void))kdf_scrypt_free },
318 { OSSL_FUNC_KDF_RESET, (void(*)(void))kdf_scrypt_reset },
319 { OSSL_FUNC_KDF_DERIVE, (void(*)(void))kdf_scrypt_derive },
320 { OSSL_FUNC_KDF_SETTABLE_CTX_PARAMS,
321 (void(*)(void))kdf_scrypt_settable_ctx_params },
322 { OSSL_FUNC_KDF_SET_CTX_PARAMS, (void(*)(void))kdf_scrypt_set_ctx_params },
323 { OSSL_FUNC_KDF_GETTABLE_CTX_PARAMS,
324 (void(*)(void))kdf_scrypt_gettable_ctx_params },
325 { OSSL_FUNC_KDF_GET_CTX_PARAMS, (void(*)(void))kdf_scrypt_get_ctx_params },
326 { 0, NULL }
327 };
328
329 #define R(a,b) (((a) << (b)) | ((a) >> (32 - (b))))
salsa208_word_specification(uint32_t inout[16])330 static void salsa208_word_specification(uint32_t inout[16])
331 {
332 int i;
333 uint32_t x[16];
334
335 memcpy(x, inout, sizeof(x));
336 for (i = 8; i > 0; i -= 2) {
337 x[4] ^= R(x[0] + x[12], 7);
338 x[8] ^= R(x[4] + x[0], 9);
339 x[12] ^= R(x[8] + x[4], 13);
340 x[0] ^= R(x[12] + x[8], 18);
341 x[9] ^= R(x[5] + x[1], 7);
342 x[13] ^= R(x[9] + x[5], 9);
343 x[1] ^= R(x[13] + x[9], 13);
344 x[5] ^= R(x[1] + x[13], 18);
345 x[14] ^= R(x[10] + x[6], 7);
346 x[2] ^= R(x[14] + x[10], 9);
347 x[6] ^= R(x[2] + x[14], 13);
348 x[10] ^= R(x[6] + x[2], 18);
349 x[3] ^= R(x[15] + x[11], 7);
350 x[7] ^= R(x[3] + x[15], 9);
351 x[11] ^= R(x[7] + x[3], 13);
352 x[15] ^= R(x[11] + x[7], 18);
353 x[1] ^= R(x[0] + x[3], 7);
354 x[2] ^= R(x[1] + x[0], 9);
355 x[3] ^= R(x[2] + x[1], 13);
356 x[0] ^= R(x[3] + x[2], 18);
357 x[6] ^= R(x[5] + x[4], 7);
358 x[7] ^= R(x[6] + x[5], 9);
359 x[4] ^= R(x[7] + x[6], 13);
360 x[5] ^= R(x[4] + x[7], 18);
361 x[11] ^= R(x[10] + x[9], 7);
362 x[8] ^= R(x[11] + x[10], 9);
363 x[9] ^= R(x[8] + x[11], 13);
364 x[10] ^= R(x[9] + x[8], 18);
365 x[12] ^= R(x[15] + x[14], 7);
366 x[13] ^= R(x[12] + x[15], 9);
367 x[14] ^= R(x[13] + x[12], 13);
368 x[15] ^= R(x[14] + x[13], 18);
369 }
370 for (i = 0; i < 16; ++i)
371 inout[i] += x[i];
372 OPENSSL_cleanse(x, sizeof(x));
373 }
374
scryptBlockMix(uint32_t * B_,uint32_t * B,uint64_t r)375 static void scryptBlockMix(uint32_t *B_, uint32_t *B, uint64_t r)
376 {
377 uint64_t i, j;
378 uint32_t X[16], *pB;
379
380 memcpy(X, B + (r * 2 - 1) * 16, sizeof(X));
381 pB = B;
382 for (i = 0; i < r * 2; i++) {
383 for (j = 0; j < 16; j++)
384 X[j] ^= *pB++;
385 salsa208_word_specification(X);
386 memcpy(B_ + (i / 2 + (i & 1) * r) * 16, X, sizeof(X));
387 }
388 OPENSSL_cleanse(X, sizeof(X));
389 }
390
scryptROMix(unsigned char * B,uint64_t r,uint64_t N,uint32_t * X,uint32_t * T,uint32_t * V)391 static void scryptROMix(unsigned char *B, uint64_t r, uint64_t N,
392 uint32_t *X, uint32_t *T, uint32_t *V)
393 {
394 unsigned char *pB;
395 uint32_t *pV;
396 uint64_t i, k;
397
398 /* Convert from little endian input */
399 for (pV = V, i = 0, pB = B; i < 32 * r; i++, pV++) {
400 *pV = *pB++;
401 *pV |= *pB++ << 8;
402 *pV |= *pB++ << 16;
403 *pV |= (uint32_t)*pB++ << 24;
404 }
405
406 for (i = 1; i < N; i++, pV += 32 * r)
407 scryptBlockMix(pV, pV - 32 * r, r);
408
409 scryptBlockMix(X, V + (N - 1) * 32 * r, r);
410
411 for (i = 0; i < N; i++) {
412 uint32_t j;
413 j = X[16 * (2 * r - 1)] % N;
414 pV = V + 32 * r * j;
415 for (k = 0; k < 32 * r; k++)
416 T[k] = X[k] ^ *pV++;
417 scryptBlockMix(X, T, r);
418 }
419 /* Convert output to little endian */
420 for (i = 0, pB = B; i < 32 * r; i++) {
421 uint32_t xtmp = X[i];
422 *pB++ = xtmp & 0xff;
423 *pB++ = (xtmp >> 8) & 0xff;
424 *pB++ = (xtmp >> 16) & 0xff;
425 *pB++ = (xtmp >> 24) & 0xff;
426 }
427 }
428
429 #ifndef SIZE_MAX
430 # define SIZE_MAX ((size_t)-1)
431 #endif
432
433 /*
434 * Maximum power of two that will fit in uint64_t: this should work on
435 * most (all?) platforms.
436 */
437
438 #define LOG2_UINT64_MAX (sizeof(uint64_t) * 8 - 1)
439
440 /*
441 * Maximum value of p * r:
442 * p <= ((2^32-1) * hLen) / MFLen =>
443 * p <= ((2^32-1) * 32) / (128 * r) =>
444 * p * r <= (2^30-1)
445 */
446
447 #define SCRYPT_PR_MAX ((1 << 30) - 1)
448
scrypt_alg(const char * pass,size_t passlen,const unsigned char * salt,size_t saltlen,uint64_t N,uint64_t r,uint64_t p,uint64_t maxmem,unsigned char * key,size_t keylen,EVP_MD * sha256,OSSL_LIB_CTX * libctx,const char * propq)449 static int scrypt_alg(const char *pass, size_t passlen,
450 const unsigned char *salt, size_t saltlen,
451 uint64_t N, uint64_t r, uint64_t p, uint64_t maxmem,
452 unsigned char *key, size_t keylen, EVP_MD *sha256,
453 OSSL_LIB_CTX *libctx, const char *propq)
454 {
455 int rv = 0;
456 unsigned char *B;
457 uint32_t *X, *V, *T;
458 uint64_t i, Blen, Vlen;
459
460 /* Sanity check parameters */
461 /* initial check, r,p must be non zero, N >= 2 and a power of 2 */
462 if (r == 0 || p == 0 || N < 2 || (N & (N - 1)))
463 return 0;
464 /* Check p * r < SCRYPT_PR_MAX avoiding overflow */
465 if (p > SCRYPT_PR_MAX / r) {
466 ERR_raise(ERR_LIB_EVP, EVP_R_MEMORY_LIMIT_EXCEEDED);
467 return 0;
468 }
469
470 /*
471 * Need to check N: if 2^(128 * r / 8) overflows limit this is
472 * automatically satisfied since N <= UINT64_MAX.
473 */
474
475 if (16 * r <= LOG2_UINT64_MAX) {
476 if (N >= (((uint64_t)1) << (16 * r))) {
477 ERR_raise(ERR_LIB_EVP, EVP_R_MEMORY_LIMIT_EXCEEDED);
478 return 0;
479 }
480 }
481
482 /* Memory checks: check total allocated buffer size fits in uint64_t */
483
484 /*
485 * B size in section 5 step 1.S
486 * Note: we know p * 128 * r < UINT64_MAX because we already checked
487 * p * r < SCRYPT_PR_MAX
488 */
489 Blen = p * 128 * r;
490 /*
491 * Yet we pass it as integer to PKCS5_PBKDF2_HMAC... [This would
492 * have to be revised when/if PKCS5_PBKDF2_HMAC accepts size_t.]
493 */
494 if (Blen > INT_MAX) {
495 ERR_raise(ERR_LIB_EVP, EVP_R_MEMORY_LIMIT_EXCEEDED);
496 return 0;
497 }
498
499 /*
500 * Check 32 * r * (N + 2) * sizeof(uint32_t) fits in uint64_t
501 * This is combined size V, X and T (section 4)
502 */
503 i = UINT64_MAX / (32 * sizeof(uint32_t));
504 if (N + 2 > i / r) {
505 ERR_raise(ERR_LIB_EVP, EVP_R_MEMORY_LIMIT_EXCEEDED);
506 return 0;
507 }
508 Vlen = 32 * r * (N + 2) * sizeof(uint32_t);
509
510 /* check total allocated size fits in uint64_t */
511 if (Blen > UINT64_MAX - Vlen) {
512 ERR_raise(ERR_LIB_EVP, EVP_R_MEMORY_LIMIT_EXCEEDED);
513 return 0;
514 }
515
516 /* Check that the maximum memory doesn't exceed a size_t limits */
517 if (maxmem > SIZE_MAX)
518 maxmem = SIZE_MAX;
519
520 if (Blen + Vlen > maxmem) {
521 ERR_raise(ERR_LIB_EVP, EVP_R_MEMORY_LIMIT_EXCEEDED);
522 return 0;
523 }
524
525 /* If no key return to indicate parameters are OK */
526 if (key == NULL)
527 return 1;
528
529 B = OPENSSL_malloc((size_t)(Blen + Vlen));
530 if (B == NULL) {
531 ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
532 return 0;
533 }
534 X = (uint32_t *)(B + Blen);
535 T = X + 32 * r;
536 V = T + 32 * r;
537 if (ossl_pkcs5_pbkdf2_hmac_ex(pass, passlen, salt, saltlen, 1, sha256,
538 (int)Blen, B, libctx, propq) == 0)
539 goto err;
540
541 for (i = 0; i < p; i++)
542 scryptROMix(B + 128 * r * i, r, N, X, T, V);
543
544 if (ossl_pkcs5_pbkdf2_hmac_ex(pass, passlen, B, (int)Blen, 1, sha256,
545 keylen, key, libctx, propq) == 0)
546 goto err;
547 rv = 1;
548 err:
549 if (rv == 0)
550 ERR_raise(ERR_LIB_EVP, EVP_R_PBKDF2_ERROR);
551
552 OPENSSL_clear_free(B, (size_t)(Blen + Vlen));
553 return rv;
554 }
555
556 #endif
557
