198 lines
6.2 KiB
C
198 lines
6.2 KiB
C
/*
|
|
* Copyright 2020-2023 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 <string.h>
|
|
#include <openssl/crypto.h>
|
|
#include <openssl/core_dispatch.h>
|
|
#include <openssl/proverr.h>
|
|
#include "prov/implementations.h"
|
|
#include "prov/ciphercommon.h"
|
|
#include "prov/providercommon.h"
|
|
|
|
typedef struct prov_cipher_null_ctx_st {
|
|
int enc;
|
|
size_t tlsmacsize;
|
|
const unsigned char *tlsmac;
|
|
} PROV_CIPHER_NULL_CTX;
|
|
|
|
static OSSL_FUNC_cipher_newctx_fn null_newctx;
|
|
static void *null_newctx(void *provctx)
|
|
{
|
|
if (!ossl_prov_is_running())
|
|
return NULL;
|
|
|
|
return OPENSSL_zalloc(sizeof(PROV_CIPHER_NULL_CTX));
|
|
}
|
|
|
|
static OSSL_FUNC_cipher_freectx_fn null_freectx;
|
|
static void null_freectx(void *vctx)
|
|
{
|
|
OPENSSL_free(vctx);
|
|
}
|
|
|
|
static OSSL_FUNC_cipher_encrypt_init_fn null_einit;
|
|
static int null_einit(void *vctx, const unsigned char *key, size_t keylen,
|
|
const unsigned char *iv, size_t ivlen,
|
|
const OSSL_PARAM params[])
|
|
{
|
|
PROV_CIPHER_NULL_CTX *ctx = (PROV_CIPHER_NULL_CTX *)vctx;
|
|
|
|
if (!ossl_prov_is_running())
|
|
return 0;
|
|
|
|
ctx->enc = 1;
|
|
return 1;
|
|
}
|
|
|
|
static OSSL_FUNC_cipher_decrypt_init_fn null_dinit;
|
|
static int null_dinit(void *vctx, const unsigned char *key, size_t keylen,
|
|
const unsigned char *iv, size_t ivlen,
|
|
const OSSL_PARAM params[])
|
|
{
|
|
if (!ossl_prov_is_running())
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static OSSL_FUNC_cipher_cipher_fn null_cipher;
|
|
static int null_cipher(void *vctx, unsigned char *out, size_t *outl,
|
|
size_t outsize, const unsigned char *in, size_t inl)
|
|
{
|
|
PROV_CIPHER_NULL_CTX *ctx = (PROV_CIPHER_NULL_CTX *)vctx;
|
|
|
|
if (!ossl_prov_is_running())
|
|
return 0;
|
|
|
|
if (!ctx->enc && ctx->tlsmacsize > 0) {
|
|
/*
|
|
* TLS NULL cipher as per:
|
|
* https://tools.ietf.org/html/rfc5246#section-6.2.3.1
|
|
*/
|
|
if (inl < ctx->tlsmacsize)
|
|
return 0;
|
|
ctx->tlsmac = in + inl - ctx->tlsmacsize;
|
|
inl -= ctx->tlsmacsize;
|
|
}
|
|
if (outsize < inl)
|
|
return 0;
|
|
if (in != out)
|
|
memcpy(out, in, inl);
|
|
*outl = inl;
|
|
return 1;
|
|
}
|
|
|
|
static OSSL_FUNC_cipher_final_fn null_final;
|
|
static int null_final(void *vctx, unsigned char *out, size_t *outl,
|
|
size_t outsize)
|
|
{
|
|
if (!ossl_prov_is_running())
|
|
return 0;
|
|
|
|
*outl = 0;
|
|
return 1;
|
|
}
|
|
|
|
static OSSL_FUNC_cipher_get_params_fn null_get_params;
|
|
static int null_get_params(OSSL_PARAM params[])
|
|
{
|
|
return ossl_cipher_generic_get_params(params, 0, 0, 0, 8, 0);
|
|
}
|
|
|
|
static const OSSL_PARAM null_known_gettable_ctx_params[] = {
|
|
OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
|
|
OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
|
|
{ OSSL_CIPHER_PARAM_TLS_MAC, OSSL_PARAM_OCTET_PTR, NULL, 0, OSSL_PARAM_UNMODIFIED },
|
|
OSSL_PARAM_END
|
|
};
|
|
|
|
static OSSL_FUNC_cipher_gettable_ctx_params_fn null_gettable_ctx_params;
|
|
static const OSSL_PARAM *null_gettable_ctx_params(ossl_unused void *cctx,
|
|
ossl_unused void *provctx)
|
|
{
|
|
return null_known_gettable_ctx_params;
|
|
}
|
|
|
|
static OSSL_FUNC_cipher_get_ctx_params_fn null_get_ctx_params;
|
|
static int null_get_ctx_params(void *vctx, OSSL_PARAM params[])
|
|
{
|
|
PROV_CIPHER_NULL_CTX *ctx = (PROV_CIPHER_NULL_CTX *)vctx;
|
|
OSSL_PARAM *p;
|
|
|
|
p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IVLEN);
|
|
if (p != NULL && !OSSL_PARAM_set_size_t(p, 0)) {
|
|
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
|
|
return 0;
|
|
}
|
|
p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_KEYLEN);
|
|
if (p != NULL && !OSSL_PARAM_set_size_t(p, 0)) {
|
|
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
|
|
return 0;
|
|
}
|
|
p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_TLS_MAC);
|
|
if (p != NULL
|
|
&& !OSSL_PARAM_set_octet_ptr(p, ctx->tlsmac, ctx->tlsmacsize)) {
|
|
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static const OSSL_PARAM null_known_settable_ctx_params[] = {
|
|
OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_TLS_MAC_SIZE, NULL),
|
|
OSSL_PARAM_END
|
|
};
|
|
|
|
static OSSL_FUNC_cipher_settable_ctx_params_fn null_settable_ctx_params;
|
|
static const OSSL_PARAM *null_settable_ctx_params(ossl_unused void *cctx,
|
|
ossl_unused void *provctx)
|
|
{
|
|
return null_known_settable_ctx_params;
|
|
}
|
|
|
|
|
|
static OSSL_FUNC_cipher_set_ctx_params_fn null_set_ctx_params;
|
|
static int null_set_ctx_params(void *vctx, const OSSL_PARAM params[])
|
|
{
|
|
PROV_CIPHER_NULL_CTX *ctx = (PROV_CIPHER_NULL_CTX *)vctx;
|
|
const OSSL_PARAM *p;
|
|
|
|
p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_TLS_MAC_SIZE);
|
|
if (p != NULL) {
|
|
if (!OSSL_PARAM_get_size_t(p, &ctx->tlsmacsize)) {
|
|
ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
const OSSL_DISPATCH ossl_null_functions[] = {
|
|
{ OSSL_FUNC_CIPHER_NEWCTX,
|
|
(void (*)(void)) null_newctx },
|
|
{ OSSL_FUNC_CIPHER_FREECTX, (void (*)(void)) null_freectx },
|
|
{ OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void)) null_newctx },
|
|
{ OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))null_einit },
|
|
{ OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))null_dinit },
|
|
{ OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))null_cipher },
|
|
{ OSSL_FUNC_CIPHER_FINAL, (void (*)(void))null_final },
|
|
{ OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))null_cipher },
|
|
{ OSSL_FUNC_CIPHER_GET_PARAMS, (void (*)(void)) null_get_params },
|
|
{ OSSL_FUNC_CIPHER_GETTABLE_PARAMS,
|
|
(void (*)(void))ossl_cipher_generic_gettable_params },
|
|
{ OSSL_FUNC_CIPHER_GET_CTX_PARAMS, (void (*)(void))null_get_ctx_params },
|
|
{ OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS,
|
|
(void (*)(void))null_gettable_ctx_params },
|
|
{ OSSL_FUNC_CIPHER_SET_CTX_PARAMS, (void (*)(void))null_set_ctx_params },
|
|
{ OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS,
|
|
(void (*)(void))null_settable_ctx_params },
|
|
OSSL_DISPATCH_END
|
|
};
|