2c68305856
The library delay loads bcrypt.dll so that it can run on versions of Windows older than Vista. Remove the compile time checks. Change-Id: I632b248dcca8b6e40e47011fc11d277e911ff209
707 lines
16 KiB
C
707 lines
16 KiB
C
/*
|
|
* Copyright (c) 2015, Secure Endpoints Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* - Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* - Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
|
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/* Windows CNG provider */
|
|
|
|
#include "config.h"
|
|
|
|
#include <windows.h>
|
|
#include <assert.h>
|
|
|
|
#include <evp.h>
|
|
#include <evp-wincng.h>
|
|
|
|
#include <bcrypt.h>
|
|
|
|
/*
|
|
* CNG cipher provider
|
|
*/
|
|
|
|
struct wincng_key {
|
|
BCRYPT_KEY_HANDLE hKey;
|
|
UCHAR rgbKeyObject[1];
|
|
};
|
|
|
|
#define WINCNG_KEY_OBJECT_SIZE(ctx) \
|
|
((ctx)->cipher->ctx_size - sizeof(struct wincng_key) + 1)
|
|
|
|
static int
|
|
wincng_do_cipher(EVP_CIPHER_CTX *ctx,
|
|
unsigned char *out,
|
|
const unsigned char *in,
|
|
unsigned int size)
|
|
{
|
|
struct wincng_key *cng = ctx->cipher_data;
|
|
NTSTATUS status;
|
|
ULONG cbResult;
|
|
|
|
assert(EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_STREAM_CIPHER ||
|
|
(size % ctx->cipher->block_size) == 0);
|
|
|
|
if (ctx->encrypt) {
|
|
status = BCryptEncrypt(cng->hKey,
|
|
(PUCHAR)in,
|
|
size,
|
|
NULL, /* pPaddingInfo */
|
|
ctx->cipher->iv_len ? ctx->iv : NULL,
|
|
ctx->cipher->iv_len,
|
|
out,
|
|
size,
|
|
&cbResult,
|
|
0);
|
|
} else {
|
|
status = BCryptDecrypt(cng->hKey,
|
|
(PUCHAR)in,
|
|
size,
|
|
NULL, /* pPaddingInfo */
|
|
ctx->cipher->iv_len ? ctx->iv : NULL,
|
|
ctx->cipher->iv_len,
|
|
out,
|
|
size,
|
|
&cbResult,
|
|
0);
|
|
}
|
|
|
|
return BCRYPT_SUCCESS(status) && cbResult == size;
|
|
}
|
|
|
|
static int
|
|
wincng_cleanup(EVP_CIPHER_CTX *ctx)
|
|
{
|
|
struct wincng_key *cng = ctx->cipher_data;
|
|
|
|
if (cng->hKey)
|
|
BCryptDestroyKey(cng->hKey);
|
|
SecureZeroMemory(cng->rgbKeyObject, WINCNG_KEY_OBJECT_SIZE(ctx));
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
wincng_cipher_algorithm_init(EVP_CIPHER *cipher,
|
|
LPWSTR pszAlgId)
|
|
{
|
|
BCRYPT_ALG_HANDLE hAlgorithm = NULL;
|
|
NTSTATUS status;
|
|
LPCWSTR pszChainingMode;
|
|
ULONG cbKeyObject, cbChainingMode, cbData;
|
|
|
|
if (cipher->app_data)
|
|
return 1;
|
|
|
|
status = BCryptOpenAlgorithmProvider(&hAlgorithm,
|
|
pszAlgId,
|
|
NULL,
|
|
0);
|
|
if (!BCRYPT_SUCCESS(status))
|
|
return 0;
|
|
|
|
status = BCryptGetProperty(hAlgorithm,
|
|
BCRYPT_OBJECT_LENGTH,
|
|
(PUCHAR)&cbKeyObject,
|
|
sizeof(ULONG),
|
|
&cbData,
|
|
0);
|
|
if (!BCRYPT_SUCCESS(status)) {
|
|
BCryptCloseAlgorithmProvider(hAlgorithm, 0);
|
|
return 0;
|
|
}
|
|
|
|
cipher->ctx_size = sizeof(struct wincng_key) + cbKeyObject - 1;
|
|
|
|
switch (cipher->flags & EVP_CIPH_MODE) {
|
|
case EVP_CIPH_CBC_MODE:
|
|
pszChainingMode = BCRYPT_CHAIN_MODE_CBC;
|
|
cbChainingMode = sizeof(BCRYPT_CHAIN_MODE_CBC);
|
|
break;
|
|
case EVP_CIPH_CFB8_MODE:
|
|
pszChainingMode = BCRYPT_CHAIN_MODE_CFB;
|
|
cbChainingMode = sizeof(BCRYPT_CHAIN_MODE_CFB);
|
|
break;
|
|
default:
|
|
pszChainingMode = NULL;
|
|
cbChainingMode = 0;
|
|
break;
|
|
}
|
|
|
|
if (cbChainingMode) {
|
|
status = BCryptSetProperty(hAlgorithm,
|
|
BCRYPT_CHAINING_MODE,
|
|
(PUCHAR)pszChainingMode,
|
|
cbChainingMode,
|
|
0);
|
|
if (!BCRYPT_SUCCESS(status)) {
|
|
BCryptCloseAlgorithmProvider(hAlgorithm, 0);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (wcscmp(pszAlgId, BCRYPT_RC2_ALGORITHM) == 0) {
|
|
ULONG cbEffectiveKeyLength = EVP_CIPHER_key_length(cipher) * 8;
|
|
|
|
status = BCryptSetProperty(hAlgorithm,
|
|
BCRYPT_EFFECTIVE_KEY_LENGTH,
|
|
(PUCHAR)&cbEffectiveKeyLength,
|
|
sizeof(cbEffectiveKeyLength),
|
|
0);
|
|
if (!BCRYPT_SUCCESS(status)) {
|
|
BCryptCloseAlgorithmProvider(hAlgorithm, 0);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
InterlockedCompareExchangePointerRelease(&cipher->app_data,
|
|
hAlgorithm, NULL);
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
wincng_key_init(EVP_CIPHER_CTX *ctx,
|
|
const unsigned char *key,
|
|
const unsigned char *iv,
|
|
int encp)
|
|
{
|
|
struct wincng_key *cng = ctx->cipher_data;
|
|
NTSTATUS status;
|
|
|
|
assert(cng != NULL);
|
|
assert(ctx->cipher != NULL);
|
|
|
|
if (ctx->cipher->app_data == NULL)
|
|
return 0;
|
|
|
|
/*
|
|
* Note: ctx->key_len not EVP_CIPHER_CTX_key_length() for
|
|
* variable length key support.
|
|
*/
|
|
status = BCryptGenerateSymmetricKey(ctx->cipher->app_data,
|
|
&cng->hKey,
|
|
cng->rgbKeyObject,
|
|
WINCNG_KEY_OBJECT_SIZE(ctx),
|
|
(PUCHAR)key,
|
|
ctx->key_len,
|
|
0);
|
|
|
|
return BCRYPT_SUCCESS(status);
|
|
}
|
|
|
|
#define WINCNG_CIPHER_ALGORITHM(name, alg_id, block_size, key_len, \
|
|
iv_len, flags) \
|
|
\
|
|
static EVP_CIPHER \
|
|
wincng_##name = { \
|
|
0, \
|
|
block_size, \
|
|
key_len, \
|
|
iv_len, \
|
|
flags, \
|
|
wincng_key_init, \
|
|
wincng_do_cipher, \
|
|
wincng_cleanup, \
|
|
0, \
|
|
NULL, \
|
|
NULL, \
|
|
NULL, \
|
|
NULL \
|
|
}; \
|
|
\
|
|
const EVP_CIPHER * \
|
|
hc_EVP_wincng_##name(void) \
|
|
{ \
|
|
wincng_cipher_algorithm_init(&wincng_##name, alg_id); \
|
|
return wincng_##name.app_data ? &wincng_##name : NULL; \
|
|
}
|
|
|
|
#define WINCNG_CIPHER_ALGORITHM_CLEANUP(name) do { \
|
|
if (wincng_##name.app_data) { \
|
|
BCryptCloseAlgorithmProvider(wincng_##name.app_data, 0); \
|
|
wincng_##name.app_data = NULL; \
|
|
} \
|
|
} while (0)
|
|
|
|
#define WINCNG_CIPHER_ALGORITHM_UNAVAILABLE(name) \
|
|
\
|
|
const EVP_CIPHER * \
|
|
hc_EVP_wincng_##name(void) \
|
|
{ \
|
|
return NULL; \
|
|
}
|
|
|
|
/**
|
|
* The tripple DES cipher type (Windows CNG provider)
|
|
*
|
|
* @return the DES-EDE3-CBC EVP_CIPHER pointer.
|
|
*
|
|
* @ingroup hcrypto_evp
|
|
*/
|
|
|
|
WINCNG_CIPHER_ALGORITHM(des_ede3_cbc,
|
|
BCRYPT_3DES_ALGORITHM,
|
|
8,
|
|
24,
|
|
8,
|
|
EVP_CIPH_CBC_MODE);
|
|
|
|
/**
|
|
* The DES cipher type (Windows CNG provider)
|
|
*
|
|
* @return the DES-CBC EVP_CIPHER pointer.
|
|
*
|
|
* @ingroup hcrypto_evp
|
|
*/
|
|
|
|
WINCNG_CIPHER_ALGORITHM(des_cbc,
|
|
BCRYPT_DES_ALGORITHM,
|
|
8,
|
|
8,
|
|
8,
|
|
EVP_CIPH_CBC_MODE);
|
|
|
|
/**
|
|
* The AES-128 cipher type (Windows CNG provider)
|
|
*
|
|
* @return the AES-128-CBC EVP_CIPHER pointer.
|
|
*
|
|
* @ingroup hcrypto_evp
|
|
*/
|
|
|
|
WINCNG_CIPHER_ALGORITHM(aes_128_cbc,
|
|
BCRYPT_AES_ALGORITHM,
|
|
16,
|
|
16,
|
|
16,
|
|
EVP_CIPH_CBC_MODE);
|
|
|
|
/**
|
|
* The AES-192 cipher type (Windows CNG provider)
|
|
*
|
|
* @return the AES-192-CBC EVP_CIPHER pointer.
|
|
*
|
|
* @ingroup hcrypto_evp
|
|
*/
|
|
|
|
WINCNG_CIPHER_ALGORITHM(aes_192_cbc,
|
|
BCRYPT_AES_ALGORITHM,
|
|
16,
|
|
24,
|
|
16,
|
|
EVP_CIPH_CBC_MODE);
|
|
|
|
/**
|
|
* The AES-256 cipher type (Windows CNG provider)
|
|
*
|
|
* @return the AES-256-CBC EVP_CIPHER pointer.
|
|
*
|
|
* @ingroup hcrypto_evp
|
|
*/
|
|
|
|
WINCNG_CIPHER_ALGORITHM(aes_256_cbc,
|
|
BCRYPT_AES_ALGORITHM,
|
|
16,
|
|
32,
|
|
16,
|
|
EVP_CIPH_CBC_MODE);
|
|
|
|
/**
|
|
* The AES-128 CFB8 cipher type (Windows CNG provider)
|
|
*
|
|
* @return the AES-128-CFB8 EVP_CIPHER pointer.
|
|
*
|
|
* @ingroup hcrypto_evp
|
|
*/
|
|
|
|
WINCNG_CIPHER_ALGORITHM(aes_128_cfb8,
|
|
BCRYPT_AES_ALGORITHM,
|
|
16,
|
|
16,
|
|
16,
|
|
EVP_CIPH_CFB8_MODE);
|
|
|
|
/**
|
|
* The AES-192 CFB8 cipher type (Windows CNG provider)
|
|
*
|
|
* @return the AES-192-CFB8 EVP_CIPHER pointer.
|
|
*
|
|
* @ingroup hcrypto_evp
|
|
*/
|
|
|
|
WINCNG_CIPHER_ALGORITHM(aes_192_cfb8,
|
|
BCRYPT_AES_ALGORITHM,
|
|
16,
|
|
24,
|
|
16,
|
|
EVP_CIPH_CFB8_MODE);
|
|
|
|
/**
|
|
* The AES-256 CFB8 cipher type (Windows CNG provider)
|
|
*
|
|
* @return the AES-256-CFB8 EVP_CIPHER pointer.
|
|
*
|
|
* @ingroup hcrypto_evp
|
|
*/
|
|
|
|
WINCNG_CIPHER_ALGORITHM(aes_256_cfb8,
|
|
BCRYPT_AES_ALGORITHM,
|
|
16,
|
|
32,
|
|
16,
|
|
EVP_CIPH_CFB8_MODE);
|
|
|
|
/**
|
|
* The RC2 cipher type - Windows CNG
|
|
*
|
|
* @return the RC2 EVP_CIPHER pointer.
|
|
*
|
|
* @ingroup hcrypto_evp
|
|
*/
|
|
|
|
WINCNG_CIPHER_ALGORITHM(rc2_cbc,
|
|
BCRYPT_RC2_ALGORITHM,
|
|
8,
|
|
16,
|
|
8,
|
|
EVP_CIPH_CBC_MODE);
|
|
|
|
/**
|
|
* The RC2-40 cipher type - Windows CNG
|
|
*
|
|
* @return the RC2-40 EVP_CIPHER pointer.
|
|
*
|
|
* @ingroup hcrypto_evp
|
|
*/
|
|
|
|
WINCNG_CIPHER_ALGORITHM(rc2_40_cbc,
|
|
BCRYPT_RC2_ALGORITHM,
|
|
8,
|
|
5,
|
|
8,
|
|
EVP_CIPH_CBC_MODE);
|
|
|
|
/**
|
|
* The RC2-64 cipher type - Windows CNG
|
|
*
|
|
* @return the RC2-64 EVP_CIPHER pointer.
|
|
*
|
|
* @ingroup hcrypto_evp
|
|
*/
|
|
|
|
WINCNG_CIPHER_ALGORITHM(rc2_64_cbc,
|
|
BCRYPT_RC2_ALGORITHM,
|
|
8,
|
|
8,
|
|
8,
|
|
EVP_CIPH_CBC_MODE);
|
|
|
|
/**
|
|
* The Camellia-128 cipher type - CommonCrypto
|
|
*
|
|
* @return the Camellia-128 EVP_CIPHER pointer.
|
|
*
|
|
* @ingroup hcrypto_evp
|
|
*/
|
|
|
|
WINCNG_CIPHER_ALGORITHM_UNAVAILABLE(camellia_128_cbc);
|
|
|
|
/**
|
|
* The Camellia-198 cipher type - CommonCrypto
|
|
*
|
|
* @return the Camellia-198 EVP_CIPHER pointer.
|
|
*
|
|
* @ingroup hcrypto_evp
|
|
*/
|
|
|
|
WINCNG_CIPHER_ALGORITHM_UNAVAILABLE(camellia_192_cbc);
|
|
|
|
/**
|
|
* The Camellia-256 cipher type - CommonCrypto
|
|
*
|
|
* @return the Camellia-256 EVP_CIPHER pointer.
|
|
*
|
|
* @ingroup hcrypto_evp
|
|
*/
|
|
|
|
WINCNG_CIPHER_ALGORITHM_UNAVAILABLE(camellia_256_cbc);
|
|
|
|
/**
|
|
* The RC4 cipher type (Windows CNG provider)
|
|
*
|
|
* @return the RC4 EVP_CIPHER pointer.
|
|
*
|
|
* @ingroup hcrypto_evp
|
|
*/
|
|
|
|
WINCNG_CIPHER_ALGORITHM(rc4,
|
|
BCRYPT_RC4_ALGORITHM,
|
|
1,
|
|
16,
|
|
0,
|
|
EVP_CIPH_STREAM_CIPHER | EVP_CIPH_VARIABLE_LENGTH);
|
|
|
|
/**
|
|
* The RC4-40 cipher type (Windows CNG provider)
|
|
*
|
|
* @return the RC4 EVP_CIPHER pointer.
|
|
*
|
|
* @ingroup hcrypto_evp
|
|
*/
|
|
|
|
WINCNG_CIPHER_ALGORITHM(rc4_40,
|
|
BCRYPT_RC4_ALGORITHM,
|
|
1,
|
|
5,
|
|
0,
|
|
EVP_CIPH_STREAM_CIPHER | EVP_CIPH_VARIABLE_LENGTH);
|
|
|
|
static void
|
|
wincng_cipher_algorithm_cleanup(void)
|
|
{
|
|
WINCNG_CIPHER_ALGORITHM_CLEANUP(des_ede3_cbc);
|
|
WINCNG_CIPHER_ALGORITHM_CLEANUP(des_cbc);
|
|
WINCNG_CIPHER_ALGORITHM_CLEANUP(aes_128_cbc);
|
|
WINCNG_CIPHER_ALGORITHM_CLEANUP(aes_192_cbc);
|
|
WINCNG_CIPHER_ALGORITHM_CLEANUP(aes_256_cbc);
|
|
WINCNG_CIPHER_ALGORITHM_CLEANUP(aes_128_cfb8);
|
|
WINCNG_CIPHER_ALGORITHM_CLEANUP(aes_192_cfb8);
|
|
WINCNG_CIPHER_ALGORITHM_CLEANUP(aes_256_cfb8);
|
|
WINCNG_CIPHER_ALGORITHM_CLEANUP(rc2_cbc);
|
|
WINCNG_CIPHER_ALGORITHM_CLEANUP(rc2_40_cbc);
|
|
WINCNG_CIPHER_ALGORITHM_CLEANUP(rc2_64_cbc);
|
|
WINCNG_CIPHER_ALGORITHM_CLEANUP(rc4);
|
|
WINCNG_CIPHER_ALGORITHM_CLEANUP(rc4_40);
|
|
}
|
|
|
|
/*
|
|
* CNG digest provider
|
|
*/
|
|
|
|
struct wincng_md_ctx {
|
|
BCRYPT_HASH_HANDLE hHash;
|
|
ULONG cbHashObject;
|
|
UCHAR rgbHashObject[1];
|
|
};
|
|
|
|
static BCRYPT_ALG_HANDLE
|
|
wincng_md_algorithm_init(EVP_MD *md,
|
|
LPCWSTR pszAlgId)
|
|
{
|
|
BCRYPT_ALG_HANDLE hAlgorithm;
|
|
NTSTATUS status;
|
|
ULONG cbHashObject, cbData;
|
|
ULONG cbHash = 0, cbBlock = 0;
|
|
|
|
status = BCryptOpenAlgorithmProvider(&hAlgorithm,
|
|
pszAlgId,
|
|
NULL,
|
|
0);
|
|
if (!BCRYPT_SUCCESS(status))
|
|
return NULL;
|
|
|
|
status = BCryptGetProperty(hAlgorithm,
|
|
BCRYPT_HASH_LENGTH,
|
|
(PUCHAR)&cbHash,
|
|
sizeof(ULONG),
|
|
&cbData,
|
|
0);
|
|
if (!BCRYPT_SUCCESS(status)) {
|
|
BCryptCloseAlgorithmProvider(hAlgorithm, 0);
|
|
return NULL;
|
|
}
|
|
|
|
status = BCryptGetProperty(hAlgorithm,
|
|
BCRYPT_HASH_BLOCK_LENGTH,
|
|
(PUCHAR)&cbBlock,
|
|
sizeof(ULONG),
|
|
&cbData,
|
|
0);
|
|
if (!BCRYPT_SUCCESS(status)) {
|
|
BCryptCloseAlgorithmProvider(hAlgorithm, 0);
|
|
return NULL;
|
|
}
|
|
|
|
status = BCryptGetProperty(hAlgorithm,
|
|
BCRYPT_OBJECT_LENGTH,
|
|
(PUCHAR)&cbHashObject,
|
|
sizeof(ULONG),
|
|
&cbData,
|
|
0);
|
|
if (!BCRYPT_SUCCESS(status)) {
|
|
BCryptCloseAlgorithmProvider(hAlgorithm, 0);
|
|
return NULL;
|
|
}
|
|
|
|
md->hash_size = cbHash;
|
|
md->block_size = cbBlock;
|
|
md->ctx_size = sizeof(struct wincng_md_ctx) + cbHashObject - 1;
|
|
|
|
return hAlgorithm;
|
|
}
|
|
|
|
static int
|
|
wincng_md_hash_init(BCRYPT_ALG_HANDLE hAlgorithm,
|
|
EVP_MD_CTX *ctx)
|
|
{
|
|
struct wincng_md_ctx *cng = (struct wincng_md_ctx *)ctx;
|
|
NTSTATUS status;
|
|
ULONG cbData;
|
|
|
|
status = BCryptGetProperty(hAlgorithm,
|
|
BCRYPT_OBJECT_LENGTH,
|
|
(PUCHAR)&cng->cbHashObject,
|
|
sizeof(ULONG),
|
|
&cbData,
|
|
0);
|
|
if (!BCRYPT_SUCCESS(status))
|
|
return 0;
|
|
|
|
status = BCryptCreateHash(hAlgorithm,
|
|
&cng->hHash,
|
|
cng->rgbHashObject,
|
|
cng->cbHashObject,
|
|
NULL,
|
|
0,
|
|
0);
|
|
|
|
return BCRYPT_SUCCESS(status);
|
|
}
|
|
|
|
static int
|
|
wincng_md_update(EVP_MD_CTX *ctx,
|
|
const void *data,
|
|
size_t length)
|
|
{
|
|
struct wincng_md_ctx *cng = (struct wincng_md_ctx *)ctx;
|
|
NTSTATUS status;
|
|
|
|
status = BCryptHashData(cng->hHash, (PUCHAR)data, length, 0);
|
|
|
|
return BCRYPT_SUCCESS(status);
|
|
}
|
|
|
|
static int
|
|
wincng_md_final(void *digest,
|
|
EVP_MD_CTX *ctx)
|
|
{
|
|
struct wincng_md_ctx *cng = (struct wincng_md_ctx *)ctx;
|
|
NTSTATUS status;
|
|
ULONG cbHash, cbData;
|
|
|
|
status = BCryptGetProperty(cng->hHash,
|
|
BCRYPT_HASH_LENGTH,
|
|
(PUCHAR)&cbHash,
|
|
sizeof(DWORD),
|
|
&cbData,
|
|
0);
|
|
if (!BCRYPT_SUCCESS(status))
|
|
return 0;
|
|
|
|
status = BCryptFinishHash(cng->hHash,
|
|
digest,
|
|
cbHash,
|
|
0);
|
|
|
|
return BCRYPT_SUCCESS(status);
|
|
}
|
|
|
|
static int
|
|
wincng_md_cleanup(EVP_MD_CTX *ctx)
|
|
{
|
|
struct wincng_md_ctx *cng = (struct wincng_md_ctx *)ctx;
|
|
|
|
if (cng->hHash)
|
|
BCryptDestroyHash(cng->hHash);
|
|
SecureZeroMemory(cng->rgbHashObject, cng->cbHashObject);
|
|
|
|
return 1;
|
|
}
|
|
|
|
#define WINCNG_MD_ALGORITHM(name, alg_id) \
|
|
\
|
|
static BCRYPT_ALG_HANDLE wincng_hAlgorithm_##name; \
|
|
\
|
|
static int wincng_##name##_init(EVP_MD_CTX *ctx) \
|
|
{ \
|
|
return wincng_md_hash_init(wincng_hAlgorithm_##name, ctx); \
|
|
} \
|
|
\
|
|
const EVP_MD * \
|
|
hc_EVP_wincng_##name(void) \
|
|
{ \
|
|
static struct hc_evp_md name = { \
|
|
0, \
|
|
0, \
|
|
0, \
|
|
wincng_##name##_init, \
|
|
wincng_md_update, \
|
|
wincng_md_final, \
|
|
wincng_md_cleanup \
|
|
}; \
|
|
\
|
|
if (wincng_hAlgorithm_##name == NULL) { \
|
|
BCRYPT_ALG_HANDLE hAlgorithm = \
|
|
wincng_md_algorithm_init(&name, alg_id); \
|
|
InterlockedCompareExchangePointerRelease( \
|
|
&wincng_hAlgorithm_##name, hAlgorithm, NULL); \
|
|
} \
|
|
return wincng_hAlgorithm_##name ? &name : NULL; \
|
|
}
|
|
|
|
#define WINCNG_MD_ALGORITHM_CLEANUP(name) do { \
|
|
if (wincng_hAlgorithm_##name) { \
|
|
BCryptCloseAlgorithmProvider(wincng_hAlgorithm_##name, 0); \
|
|
wincng_hAlgorithm_##name = NULL; \
|
|
} \
|
|
} while (0)
|
|
|
|
WINCNG_MD_ALGORITHM(md2, BCRYPT_MD2_ALGORITHM);
|
|
WINCNG_MD_ALGORITHM(md4, BCRYPT_MD4_ALGORITHM);
|
|
WINCNG_MD_ALGORITHM(md5, BCRYPT_MD5_ALGORITHM);
|
|
WINCNG_MD_ALGORITHM(sha1, BCRYPT_SHA1_ALGORITHM);
|
|
WINCNG_MD_ALGORITHM(sha256, BCRYPT_SHA256_ALGORITHM);
|
|
WINCNG_MD_ALGORITHM(sha384, BCRYPT_SHA384_ALGORITHM);
|
|
WINCNG_MD_ALGORITHM(sha512, BCRYPT_SHA512_ALGORITHM);
|
|
|
|
static void
|
|
wincng_md_algorithm_cleanup(void)
|
|
{
|
|
WINCNG_MD_ALGORITHM_CLEANUP(md2);
|
|
WINCNG_MD_ALGORITHM_CLEANUP(md4);
|
|
WINCNG_MD_ALGORITHM_CLEANUP(md5);
|
|
WINCNG_MD_ALGORITHM_CLEANUP(sha1);
|
|
WINCNG_MD_ALGORITHM_CLEANUP(sha256);
|
|
WINCNG_MD_ALGORITHM_CLEANUP(sha384);
|
|
WINCNG_MD_ALGORITHM_CLEANUP(sha512);
|
|
}
|
|
|
|
void _hc_wincng_cleanup(void)
|
|
{
|
|
wincng_md_algorithm_cleanup();
|
|
wincng_cipher_algorithm_cleanup();
|
|
}
|