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b425001010
Many of the new types introduced by OpenSSL 3.0 have an OSSL_ prefix, e.g., OSSL_CALLBACK, OSSL_PARAM, OSSL_ALGORITHM, OSSL_SERIALIZER. The OPENSSL_CTX type stands out a little by using a different prefix. For consistency reasons, this type is renamed to OSSL_LIB_CTX. Reviewed-by: Paul Dale <paul.dale@oracle.com> Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/12621)
91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/*
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* Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <openssl/evp.h>
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#include <openssl/err.h>
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#include <openssl/kdf.h>
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#include <openssl/core_names.h>
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#include "internal/numbers.h"
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#ifndef OPENSSL_NO_SCRYPT
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/*
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* Maximum permitted memory allow this to be overridden with Configuration
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* option: e.g. -DSCRYPT_MAX_MEM=0 for maximum possible.
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*/
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#ifdef SCRYPT_MAX_MEM
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# if SCRYPT_MAX_MEM == 0
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# undef SCRYPT_MAX_MEM
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/*
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* Although we could theoretically allocate SIZE_MAX memory that would leave
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* no memory available for anything else so set limit as half that.
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*/
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# define SCRYPT_MAX_MEM (SIZE_MAX/2)
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# endif
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#else
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/* Default memory limit: 32 MB */
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# define SCRYPT_MAX_MEM (1024 * 1024 * 32)
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#endif
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int EVP_PBE_scrypt(const char *pass, size_t passlen,
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const unsigned char *salt, size_t saltlen,
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uint64_t N, uint64_t r, uint64_t p, uint64_t maxmem,
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unsigned char *key, size_t keylen)
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{
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const char *empty = "";
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int rv = 1;
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EVP_KDF *kdf;
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EVP_KDF_CTX *kctx;
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OSSL_PARAM params[7], *z = params;
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if (r > UINT32_MAX || p > UINT32_MAX) {
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EVPerr(0, EVP_R_PARAMETER_TOO_LARGE);
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return 0;
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}
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/* Maintain existing behaviour. */
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if (pass == NULL) {
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pass = empty;
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passlen = 0;
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}
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if (salt == NULL) {
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salt = (const unsigned char *)empty;
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saltlen = 0;
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}
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if (maxmem == 0)
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maxmem = SCRYPT_MAX_MEM;
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/* Use OSSL_LIB_CTX_set0_default() if you need a library context */
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kdf = EVP_KDF_fetch(NULL, OSSL_KDF_NAME_SCRYPT, NULL);
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kctx = EVP_KDF_CTX_new(kdf);
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EVP_KDF_free(kdf);
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if (kctx == NULL)
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return 0;
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*z++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_PASSWORD,
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(unsigned char *)pass,
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passlen);
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*z++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SALT,
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(unsigned char *)salt, saltlen);
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*z++ = OSSL_PARAM_construct_uint64(OSSL_KDF_PARAM_SCRYPT_N, &N);
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*z++ = OSSL_PARAM_construct_uint64(OSSL_KDF_PARAM_SCRYPT_R, &r);
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*z++ = OSSL_PARAM_construct_uint64(OSSL_KDF_PARAM_SCRYPT_P, &p);
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*z++ = OSSL_PARAM_construct_uint64(OSSL_KDF_PARAM_SCRYPT_MAXMEM, &maxmem);
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*z = OSSL_PARAM_construct_end();
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if (EVP_KDF_CTX_set_params(kctx, params) != 1
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|| EVP_KDF_derive(kctx, key, keylen) != 1)
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rv = 0;
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EVP_KDF_CTX_free(kctx);
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return rv;
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}
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#endif
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