mirror of
https://github.com/openssl/openssl.git
synced 2024-11-27 05:21:51 +08:00
365a2d9991
Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/7772)
275 lines
7.8 KiB
C
275 lines
7.8 KiB
C
/*
|
|
* Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
|
|
*
|
|
* 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 <stdio.h>
|
|
#include "internal/cryptlib.h"
|
|
#include <openssl/asn1t.h>
|
|
#include <openssl/err.h>
|
|
#include <openssl/evp.h>
|
|
#include <openssl/x509.h>
|
|
#include <openssl/rand.h>
|
|
|
|
#ifndef OPENSSL_NO_SCRYPT
|
|
/* PKCS#5 scrypt password based encryption structures */
|
|
|
|
ASN1_SEQUENCE(SCRYPT_PARAMS) = {
|
|
ASN1_SIMPLE(SCRYPT_PARAMS, salt, ASN1_OCTET_STRING),
|
|
ASN1_SIMPLE(SCRYPT_PARAMS, costParameter, ASN1_INTEGER),
|
|
ASN1_SIMPLE(SCRYPT_PARAMS, blockSize, ASN1_INTEGER),
|
|
ASN1_SIMPLE(SCRYPT_PARAMS, parallelizationParameter, ASN1_INTEGER),
|
|
ASN1_OPT(SCRYPT_PARAMS, keyLength, ASN1_INTEGER),
|
|
} ASN1_SEQUENCE_END(SCRYPT_PARAMS)
|
|
|
|
IMPLEMENT_ASN1_FUNCTIONS(SCRYPT_PARAMS)
|
|
|
|
static X509_ALGOR *pkcs5_scrypt_set(const unsigned char *salt, size_t saltlen,
|
|
size_t keylen, uint64_t N, uint64_t r,
|
|
uint64_t p);
|
|
|
|
/*
|
|
* Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm using scrypt
|
|
*/
|
|
|
|
X509_ALGOR *PKCS5_pbe2_set_scrypt(const EVP_CIPHER *cipher,
|
|
const unsigned char *salt, int saltlen,
|
|
unsigned char *aiv, uint64_t N, uint64_t r,
|
|
uint64_t p)
|
|
{
|
|
X509_ALGOR *scheme = NULL, *ret = NULL;
|
|
int alg_nid;
|
|
size_t keylen = 0;
|
|
EVP_CIPHER_CTX *ctx = NULL;
|
|
unsigned char iv[EVP_MAX_IV_LENGTH];
|
|
PBE2PARAM *pbe2 = NULL;
|
|
|
|
if (!cipher) {
|
|
ASN1err(ASN1_F_PKCS5_PBE2_SET_SCRYPT, ERR_R_PASSED_NULL_PARAMETER);
|
|
goto err;
|
|
}
|
|
|
|
if (EVP_PBE_scrypt(NULL, 0, NULL, 0, N, r, p, 0, NULL, 0) == 0) {
|
|
ASN1err(ASN1_F_PKCS5_PBE2_SET_SCRYPT,
|
|
ASN1_R_INVALID_SCRYPT_PARAMETERS);
|
|
goto err;
|
|
}
|
|
|
|
alg_nid = EVP_CIPHER_type(cipher);
|
|
if (alg_nid == NID_undef) {
|
|
ASN1err(ASN1_F_PKCS5_PBE2_SET_SCRYPT,
|
|
ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
|
|
goto err;
|
|
}
|
|
|
|
pbe2 = PBE2PARAM_new();
|
|
if (pbe2 == NULL)
|
|
goto merr;
|
|
|
|
/* Setup the AlgorithmIdentifier for the encryption scheme */
|
|
scheme = pbe2->encryption;
|
|
|
|
scheme->algorithm = OBJ_nid2obj(alg_nid);
|
|
scheme->parameter = ASN1_TYPE_new();
|
|
if (scheme->parameter == NULL)
|
|
goto merr;
|
|
|
|
/* Create random IV */
|
|
if (EVP_CIPHER_iv_length(cipher)) {
|
|
if (aiv)
|
|
memcpy(iv, aiv, EVP_CIPHER_iv_length(cipher));
|
|
else if (RAND_bytes(iv, EVP_CIPHER_iv_length(cipher)) <= 0)
|
|
goto err;
|
|
}
|
|
|
|
ctx = EVP_CIPHER_CTX_new();
|
|
if (ctx == NULL)
|
|
goto merr;
|
|
|
|
/* Dummy cipherinit to just setup the IV */
|
|
if (EVP_CipherInit_ex(ctx, cipher, NULL, NULL, iv, 0) == 0)
|
|
goto err;
|
|
if (EVP_CIPHER_param_to_asn1(ctx, scheme->parameter) <= 0) {
|
|
ASN1err(ASN1_F_PKCS5_PBE2_SET_SCRYPT,
|
|
ASN1_R_ERROR_SETTING_CIPHER_PARAMS);
|
|
goto err;
|
|
}
|
|
EVP_CIPHER_CTX_free(ctx);
|
|
ctx = NULL;
|
|
|
|
/* If its RC2 then we'd better setup the key length */
|
|
|
|
if (alg_nid == NID_rc2_cbc)
|
|
keylen = EVP_CIPHER_key_length(cipher);
|
|
|
|
/* Setup keyfunc */
|
|
|
|
X509_ALGOR_free(pbe2->keyfunc);
|
|
|
|
pbe2->keyfunc = pkcs5_scrypt_set(salt, saltlen, keylen, N, r, p);
|
|
|
|
if (pbe2->keyfunc == NULL)
|
|
goto merr;
|
|
|
|
/* Now set up top level AlgorithmIdentifier */
|
|
|
|
ret = X509_ALGOR_new();
|
|
if (ret == NULL)
|
|
goto merr;
|
|
|
|
ret->algorithm = OBJ_nid2obj(NID_pbes2);
|
|
|
|
/* Encode PBE2PARAM into parameter */
|
|
|
|
if (ASN1_TYPE_pack_sequence(ASN1_ITEM_rptr(PBE2PARAM), pbe2,
|
|
&ret->parameter) == NULL)
|
|
goto merr;
|
|
|
|
PBE2PARAM_free(pbe2);
|
|
pbe2 = NULL;
|
|
|
|
return ret;
|
|
|
|
merr:
|
|
ASN1err(ASN1_F_PKCS5_PBE2_SET_SCRYPT, ERR_R_MALLOC_FAILURE);
|
|
|
|
err:
|
|
PBE2PARAM_free(pbe2);
|
|
X509_ALGOR_free(ret);
|
|
EVP_CIPHER_CTX_free(ctx);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static X509_ALGOR *pkcs5_scrypt_set(const unsigned char *salt, size_t saltlen,
|
|
size_t keylen, uint64_t N, uint64_t r,
|
|
uint64_t p)
|
|
{
|
|
X509_ALGOR *keyfunc = NULL;
|
|
SCRYPT_PARAMS *sparam = SCRYPT_PARAMS_new();
|
|
|
|
if (sparam == NULL)
|
|
goto merr;
|
|
|
|
if (!saltlen)
|
|
saltlen = PKCS5_SALT_LEN;
|
|
|
|
/* This will either copy salt or grow the buffer */
|
|
if (ASN1_STRING_set(sparam->salt, salt, saltlen) == 0)
|
|
goto merr;
|
|
|
|
if (salt == NULL && RAND_bytes(sparam->salt->data, saltlen) <= 0)
|
|
goto err;
|
|
|
|
if (ASN1_INTEGER_set_uint64(sparam->costParameter, N) == 0)
|
|
goto merr;
|
|
|
|
if (ASN1_INTEGER_set_uint64(sparam->blockSize, r) == 0)
|
|
goto merr;
|
|
|
|
if (ASN1_INTEGER_set_uint64(sparam->parallelizationParameter, p) == 0)
|
|
goto merr;
|
|
|
|
/* If have a key len set it up */
|
|
|
|
if (keylen > 0) {
|
|
sparam->keyLength = ASN1_INTEGER_new();
|
|
if (sparam->keyLength == NULL)
|
|
goto merr;
|
|
if (ASN1_INTEGER_set_int64(sparam->keyLength, keylen) == 0)
|
|
goto merr;
|
|
}
|
|
|
|
/* Finally setup the keyfunc structure */
|
|
|
|
keyfunc = X509_ALGOR_new();
|
|
if (keyfunc == NULL)
|
|
goto merr;
|
|
|
|
keyfunc->algorithm = OBJ_nid2obj(NID_id_scrypt);
|
|
|
|
/* Encode SCRYPT_PARAMS into parameter of pbe2 */
|
|
|
|
if (ASN1_TYPE_pack_sequence(ASN1_ITEM_rptr(SCRYPT_PARAMS), sparam,
|
|
&keyfunc->parameter) == NULL)
|
|
goto merr;
|
|
|
|
SCRYPT_PARAMS_free(sparam);
|
|
return keyfunc;
|
|
|
|
merr:
|
|
ASN1err(ASN1_F_PKCS5_SCRYPT_SET, ERR_R_MALLOC_FAILURE);
|
|
err:
|
|
SCRYPT_PARAMS_free(sparam);
|
|
X509_ALGOR_free(keyfunc);
|
|
return NULL;
|
|
}
|
|
|
|
int PKCS5_v2_scrypt_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass,
|
|
int passlen, ASN1_TYPE *param,
|
|
const EVP_CIPHER *c, const EVP_MD *md, int en_de)
|
|
{
|
|
unsigned char *salt, key[EVP_MAX_KEY_LENGTH];
|
|
uint64_t p, r, N;
|
|
size_t saltlen;
|
|
size_t keylen = 0;
|
|
int rv = 0;
|
|
SCRYPT_PARAMS *sparam = NULL;
|
|
|
|
if (EVP_CIPHER_CTX_cipher(ctx) == NULL) {
|
|
EVPerr(EVP_F_PKCS5_V2_SCRYPT_KEYIVGEN, EVP_R_NO_CIPHER_SET);
|
|
goto err;
|
|
}
|
|
|
|
/* Decode parameter */
|
|
|
|
sparam = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(SCRYPT_PARAMS), param);
|
|
|
|
if (sparam == NULL) {
|
|
EVPerr(EVP_F_PKCS5_V2_SCRYPT_KEYIVGEN, EVP_R_DECODE_ERROR);
|
|
goto err;
|
|
}
|
|
|
|
keylen = EVP_CIPHER_CTX_key_length(ctx);
|
|
|
|
/* Now check the parameters of sparam */
|
|
|
|
if (sparam->keyLength) {
|
|
uint64_t spkeylen;
|
|
if ((ASN1_INTEGER_get_uint64(&spkeylen, sparam->keyLength) == 0)
|
|
|| (spkeylen != keylen)) {
|
|
EVPerr(EVP_F_PKCS5_V2_SCRYPT_KEYIVGEN,
|
|
EVP_R_UNSUPPORTED_KEYLENGTH);
|
|
goto err;
|
|
}
|
|
}
|
|
/* Check all parameters fit in uint64_t and are acceptable to scrypt */
|
|
if (ASN1_INTEGER_get_uint64(&N, sparam->costParameter) == 0
|
|
|| ASN1_INTEGER_get_uint64(&r, sparam->blockSize) == 0
|
|
|| ASN1_INTEGER_get_uint64(&p, sparam->parallelizationParameter) == 0
|
|
|| EVP_PBE_scrypt(NULL, 0, NULL, 0, N, r, p, 0, NULL, 0) == 0) {
|
|
EVPerr(EVP_F_PKCS5_V2_SCRYPT_KEYIVGEN,
|
|
EVP_R_ILLEGAL_SCRYPT_PARAMETERS);
|
|
goto err;
|
|
}
|
|
|
|
/* it seems that its all OK */
|
|
|
|
salt = sparam->salt->data;
|
|
saltlen = sparam->salt->length;
|
|
if (EVP_PBE_scrypt(pass, passlen, salt, saltlen, N, r, p, 0, key, keylen)
|
|
== 0)
|
|
goto err;
|
|
rv = EVP_CipherInit_ex(ctx, NULL, NULL, key, NULL, en_de);
|
|
err:
|
|
if (keylen)
|
|
OPENSSL_cleanse(key, keylen);
|
|
SCRYPT_PARAMS_free(sparam);
|
|
return rv;
|
|
}
|
|
#endif /* OPENSSL_NO_SCRYPT */
|