/*
- * Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
*
- * Licensed under the OpenSSL license (the "License"). You may not use
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
-#include <stddef.h>
-#include <stdio.h>
-#include <string.h>
#include <openssl/evp.h>
#include <openssl/err.h>
+#include <openssl/kdf.h>
+#include <openssl/core_names.h>
#include "internal/numbers.h"
#ifndef OPENSSL_NO_SCRYPT
-#define R(a,b) (((a) << (b)) | ((a) >> (32 - (b))))
-static void salsa208_word_specification(uint32_t inout[16])
-{
- int i;
- uint32_t x[16];
- memcpy(x, inout, sizeof(x));
- for (i = 8; i > 0; i -= 2) {
- x[4] ^= R(x[0] + x[12], 7);
- x[8] ^= R(x[4] + x[0], 9);
- x[12] ^= R(x[8] + x[4], 13);
- x[0] ^= R(x[12] + x[8], 18);
- x[9] ^= R(x[5] + x[1], 7);
- x[13] ^= R(x[9] + x[5], 9);
- x[1] ^= R(x[13] + x[9], 13);
- x[5] ^= R(x[1] + x[13], 18);
- x[14] ^= R(x[10] + x[6], 7);
- x[2] ^= R(x[14] + x[10], 9);
- x[6] ^= R(x[2] + x[14], 13);
- x[10] ^= R(x[6] + x[2], 18);
- x[3] ^= R(x[15] + x[11], 7);
- x[7] ^= R(x[3] + x[15], 9);
- x[11] ^= R(x[7] + x[3], 13);
- x[15] ^= R(x[11] + x[7], 18);
- x[1] ^= R(x[0] + x[3], 7);
- x[2] ^= R(x[1] + x[0], 9);
- x[3] ^= R(x[2] + x[1], 13);
- x[0] ^= R(x[3] + x[2], 18);
- x[6] ^= R(x[5] + x[4], 7);
- x[7] ^= R(x[6] + x[5], 9);
- x[4] ^= R(x[7] + x[6], 13);
- x[5] ^= R(x[4] + x[7], 18);
- x[11] ^= R(x[10] + x[9], 7);
- x[8] ^= R(x[11] + x[10], 9);
- x[9] ^= R(x[8] + x[11], 13);
- x[10] ^= R(x[9] + x[8], 18);
- x[12] ^= R(x[15] + x[14], 7);
- x[13] ^= R(x[12] + x[15], 9);
- x[14] ^= R(x[13] + x[12], 13);
- x[15] ^= R(x[14] + x[13], 18);
- }
- for (i = 0; i < 16; ++i)
- inout[i] += x[i];
- OPENSSL_cleanse(x, sizeof(x));
-}
-
-static void scryptBlockMix(uint32_t *B_, uint32_t *B, uint64_t r)
-{
- uint64_t i, j;
- uint32_t X[16], *pB;
-
- memcpy(X, B + (r * 2 - 1) * 16, sizeof(X));
- pB = B;
- for (i = 0; i < r * 2; i++) {
- for (j = 0; j < 16; j++)
- X[j] ^= *pB++;
- salsa208_word_specification(X);
- memcpy(B_ + (i / 2 + (i & 1) * r) * 16, X, sizeof(X));
- }
- OPENSSL_cleanse(X, sizeof(X));
-}
-
-static void scryptROMix(unsigned char *B, uint64_t r, uint64_t N,
- uint32_t *X, uint32_t *T, uint32_t *V)
-{
- unsigned char *pB;
- uint32_t *pV;
- uint64_t i, k;
-
- /* Convert from little endian input */
- for (pV = V, i = 0, pB = B; i < 32 * r; i++, pV++) {
- *pV = *pB++;
- *pV |= *pB++ << 8;
- *pV |= *pB++ << 16;
- *pV |= (uint32_t)*pB++ << 24;
- }
-
- for (i = 1; i < N; i++, pV += 32 * r)
- scryptBlockMix(pV, pV - 32 * r, r);
-
- scryptBlockMix(X, V + (N - 1) * 32 * r, r);
-
- for (i = 0; i < N; i++) {
- uint32_t j;
- j = X[16 * (2 * r - 1)] % N;
- pV = V + 32 * r * j;
- for (k = 0; k < 32 * r; k++)
- T[k] = X[k] ^ *pV++;
- scryptBlockMix(X, T, r);
- }
- /* Convert output to little endian */
- for (i = 0, pB = B; i < 32 * r; i++) {
- uint32_t xtmp = X[i];
- *pB++ = xtmp & 0xff;
- *pB++ = (xtmp >> 8) & 0xff;
- *pB++ = (xtmp >> 16) & 0xff;
- *pB++ = (xtmp >> 24) & 0xff;
- }
-}
-
-#ifndef SIZE_MAX
-# define SIZE_MAX ((size_t)-1)
-#endif
-
-/*
- * Maximum power of two that will fit in uint64_t: this should work on
- * most (all?) platforms.
- */
-
-#define LOG2_UINT64_MAX (sizeof(uint64_t) * 8 - 1)
-
-/*
- * Maximum value of p * r:
- * p <= ((2^32-1) * hLen) / MFLen =>
- * p <= ((2^32-1) * 32) / (128 * r) =>
- * p * r <= (2^30-1)
- *
- */
-
-#define SCRYPT_PR_MAX ((1 << 30) - 1)
-
/*
* Maximum permitted memory allow this to be overridden with Configuration
* option: e.g. -DSCRYPT_MAX_MEM=0 for maximum possible.
uint64_t N, uint64_t r, uint64_t p, uint64_t maxmem,
unsigned char *key, size_t keylen)
{
- int rv = 0;
- unsigned char *B;
- uint32_t *X, *V, *T;
- uint64_t i, Blen, Vlen;
-
- /* Sanity check parameters */
- /* initial check, r,p must be non zero, N >= 2 and a power of 2 */
- if (r == 0 || p == 0 || N < 2 || (N & (N - 1)))
+ const char *empty = "";
+ int rv = 1;
+ EVP_KDF *kdf;
+ EVP_KDF_CTX *kctx;
+ OSSL_PARAM params[7], *z = params;
+
+ if (r > UINT32_MAX || p > UINT32_MAX) {
+ EVPerr(EVP_F_EVP_PBE_SCRYPT, EVP_R_PARAMETER_TOO_LARGE);
return 0;
- /* Check p * r < SCRYPT_PR_MAX avoiding overflow */
- if (p > SCRYPT_PR_MAX / r)
- return 0;
-
- /*
- * Need to check N: if 2^(128 * r / 8) overflows limit this is
- * automatically satisfied since N <= UINT64_MAX.
- */
-
- if (16 * r <= LOG2_UINT64_MAX) {
- if (N >= (((uint64_t)1) << (16 * r)))
- return 0;
}
- /* Memory checks: check total allocated buffer size fits in uint64_t */
-
- /*
- * B size in section 5 step 1.S
- * Note: we know p * 128 * r < UINT64_MAX because we already checked
- * p * r < SCRYPT_PR_MAX
- */
- Blen = p * 128 * r;
-
- /*
- * Check 32 * r * (N + 2) * sizeof(uint32_t) fits in uint64_t
- * This is combined size V, X and T (section 4)
- */
- i = UINT64_MAX / (32 * sizeof(uint32_t));
- if (N + 2 > i / r)
- return 0;
- Vlen = 32 * r * (N + 2) * sizeof(uint32_t);
-
- /* check total allocated size fits in uint64_t */
- if (Blen > UINT64_MAX - Vlen)
- return 0;
-
+ /* Maintain existing behaviour. */
+ if (pass == NULL) {
+ pass = empty;
+ passlen = 0;
+ }
+ if (salt == NULL) {
+ salt = (const unsigned char *)empty;
+ saltlen = 0;
+ }
if (maxmem == 0)
maxmem = SCRYPT_MAX_MEM;
- /* Check that the maximum memory doesn't exceed a size_t limits */
- if (maxmem > SIZE_MAX)
- maxmem = SIZE_MAX;
-
- if (Blen + Vlen > maxmem) {
- EVPerr(EVP_F_EVP_PBE_SCRYPT, EVP_R_MEMORY_LIMIT_EXCEEDED);
+ kdf = EVP_KDF_fetch(NULL, SN_id_scrypt, NULL);
+ kctx = EVP_KDF_CTX_new(kdf);
+ EVP_KDF_free(kdf);
+ if (kctx == NULL)
return 0;
- }
-
- /* If no key return to indicate parameters are OK */
- if (key == NULL)
- return 1;
-
- B = OPENSSL_malloc(Blen + Vlen);
- if (B == NULL)
- return 0;
- X = (uint32_t *)(B + Blen);
- T = X + 32 * r;
- V = T + 32 * r;
- if (PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen, 1, EVP_sha256(),
- Blen, B) == 0)
- goto err;
-
- for (i = 0; i < p; i++)
- scryptROMix(B + 128 * r * i, r, N, X, T, V);
- if (PKCS5_PBKDF2_HMAC(pass, passlen, B, Blen, 1, EVP_sha256(),
- keylen, key) == 0)
- goto err;
- rv = 1;
- err:
- OPENSSL_clear_free(B, Blen + Vlen);
+ *z++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_PASSWORD,
+ (unsigned char *)pass,
+ passlen);
+ *z++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SALT,
+ (unsigned char *)salt, saltlen);
+ *z++ = OSSL_PARAM_construct_uint64(OSSL_KDF_PARAM_SCRYPT_N, &N);
+ *z++ = OSSL_PARAM_construct_uint64(OSSL_KDF_PARAM_SCRYPT_R, &r);
+ *z++ = OSSL_PARAM_construct_uint64(OSSL_KDF_PARAM_SCRYPT_P, &p);
+ *z++ = OSSL_PARAM_construct_uint64(OSSL_KDF_PARAM_SCRYPT_MAXMEM, &maxmem);
+ *z = OSSL_PARAM_construct_end();
+ if (EVP_KDF_CTX_set_params(kctx, params) != 1
+ || EVP_KDF_derive(kctx, key, keylen) != 1)
+ rv = 0;
+
+ EVP_KDF_CTX_free(kctx);
return rv;
}
+
#endif
projects / openssl.git / blobdiff