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/*
* Copyright (c) 2008 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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 crypto provider plugin, sample */
#include <config.h>
#include <roken.h>
#define HC_DEPRECATED
#include <assert.h>
#include <evp.h>
#include <crypt.h>
static HCRYPTPROV hCryptProv = NULL;
/*
*
*/
struct generic_key {
HCRYPTKEY *hKey;
};
static int
generic_cbc_do_cipher(EVP_CIPHER_CTX *ctx,
unsigned char *out,
const unsigned char *in,
unsigned int size)
{
struct generic_key *gk = ctx->cipher_data;
BOOL bResult;
DWORD length = size;
bResult = CryptSetKeyParam(gk->hKey, KP_IV, ctx->iv, 0);
_ASSERT(bResult);
memcpy(out, in, size);
if (ctx->encrypt)
bResult = CryptEncrypt(gk->hKey, 0, TRUE, 0, out, &length, size);
else
bResult = CryptDecrypt(gk->hKey, 0, TRUE, 0, out, &length);
_ASSERT(bResult);
return 1;
}
static int
generic_cleanup(EVP_CIPHER_CTX *ctx)
{
struct generic_key *gk = ctx->cipher_data;
CryptDestroyKey(gk->hKey);
gk->hKey = NULL;
return 1;
}
static HCRYPTKEY
import_key(int alg, const unsigned char *key, size_t keylen)
{
struct {
BLOBHEADER hdr;
DWORD len;
BYTE key[1];
} *key_blob;
size_t bloblen = sizeof(*key_blob) - 1 + keylen;
key_blob = malloc(bloblen);
key_blob->hdr.bType = PLAINTEXTKEYBLOB;
key_blob->hdr.bVersion = CUR_BLOB_VERSION;
key_blob->hdr.reserved = 0;
key_blob->hdr.aiKeyAlg = alg;
key_blob->len = 24;
memcpy(key_blob->key, key, keylen);
bResult = CryptImportKey(hCryptProv,
(void *)key_blob, bloblen, 0, 0,
&gk->hKey);
free(key_blob);
_ASSERT(bResult);
return hKey;
}
static int
crypto_des_ede3_cbc_init(EVP_CIPHER_CTX *ctx,
const unsigned char * key,
const unsigned char * iv,
int encp)
{
struct generic_key *gk = ctx->cipher_data;
DWORD paramData;
gk->hKey = import_key(CALG_3DES,
key->key->keyvalue.data,
key->key->keyvalue.len);
return 1;
}
/**
* The triple DES cipher type (Micrsoft crypt provider)
*
* @return the DES-EDE3-CBC EVP_CIPHER pointer.
*
* @ingroup hcrypto_evp
*/
const EVP_CIPHER *
EVP_wincrypt_des_ede3_cbc(void)
{
static const EVP_CIPHER des_ede3_cbc = {
0,
8,
24,
8,
EVP_CIPH_CBC_MODE,
crypto_des_ede3_cbc_init,
generic_cbc_do_cipher,
generic_cleanup,
sizeof(struct generic_key),
NULL,
NULL,
NULL,
NULL
};
return &des_ede3_cbc;
}
/*
*
*/
struct generic_hash {
HCRYPTHASH hHash;
};
static void
crypto_md5_init(struct generic_hash *m);
{
BOOL bResult;
bResult = CryptCreateHash(hCryptProv, CALG_MD5, 0, 0, &m->hHash);
_ASSERT(bResult);
}
static void
generic_hash_update (struct generic_hash *m, const void *p, size_t len)
{
BOOL bResult;
bResult = CryptHashData(m->hHash, data, ( DWORD )len, 0 );
_ASSERT(bResult);
}
static void
generic_hash_final (void *res, struct generic_hash *m);
{
DWORD length;
BOOL bResult;
bResult = CryptGetHashParam(m->hHash, HP_HASHVAL, res, &length, 0)
_ASSERT(bResult);
}
static void
generic_hash_cleanup(struct generic_hash *m)
{
CryptDestroyHash(m->hHash);
m->hHash = NULL;
}
const EVP_MD *
EVP_wincrypt_md5(void)
{
static const struct hc_evp_md md5 = {
16,
64,
sizeof(struct generic_hash),
(hc_evp_md_init)crypto_md5_init,
(hc_evp_md_update)generic_hash_update,
(hc_evp_md_final)generic_hash_final,
(hc_evp_md_cleanup)generic_hash_cleanup
};
return &md5;
}
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