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/*
* Copyright 2019-2021 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
*/
/* Internal EVP utility functions */
#include <openssl/core.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#include <openssl/asn1.h> /* evp_local.h needs it */
#include <openssl/safestack.h> /* evp_local.h needs it */
#include "crypto/evp.h" /* evp_local.h needs it */
#include "evp_local.h"
/*
* EVP_CTRL_RET_UNSUPPORTED = -1 is the returned value from any ctrl function
* where the control command isn't supported, and an alternative code path
* may be chosen.
* Since these functions are used to implement ctrl functionality, we
* use the same value, and other callers will have to compensate.
*/
#define PARAM_CHECK(obj, func, errfunc) \
if (obj == NULL) \
return 0; \
if (obj->prov == NULL) \
return EVP_CTRL_RET_UNSUPPORTED; \
if (obj->func == NULL) { \
errfunc(); \
return 0; \
}
#define PARAM_FUNC(name, func, type, err) \
int name (const type *obj, OSSL_PARAM params[]) \
{ \
PARAM_CHECK(obj, func, err) \
return obj->func(params); \
}
#define PARAM_CTX_FUNC(name, func, type, err) \
int name (const type *obj, void *algctx, OSSL_PARAM params[]) \
{ \
PARAM_CHECK(obj, func, err) \
return obj->func(algctx, params); \
}
#define PARAM_FUNCTIONS(type, \
getname, getfunc, \
getctxname, getctxfunc, \
setctxname, setctxfunc) \
PARAM_FUNC(getname, getfunc, type, geterr) \
PARAM_CTX_FUNC(getctxname, getctxfunc, type, geterr) \
PARAM_CTX_FUNC(setctxname, setctxfunc, type, seterr)
/*
* These error functions are a workaround for the error scripts, which
* currently require that XXXerr method appears inside a function (not a macro).
*/
static void geterr(void)
{
ERR_raise(ERR_LIB_EVP, EVP_R_CANNOT_GET_PARAMETERS);
}
static void seterr(void)
{
ERR_raise(ERR_LIB_EVP, EVP_R_CANNOT_SET_PARAMETERS);
}
PARAM_FUNCTIONS(EVP_CIPHER,
evp_do_ciph_getparams, get_params,
evp_do_ciph_ctx_getparams, get_ctx_params,
evp_do_ciph_ctx_setparams, set_ctx_params)
PARAM_FUNCTIONS(EVP_MD,
evp_do_md_getparams, get_params,
evp_do_md_ctx_getparams, get_ctx_params,
evp_do_md_ctx_setparams, set_ctx_params)
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