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openssl/providers/common/provider_util.c
slontis f5981c9629 Add utility function ossl_param_is_empty() 
Changed all provider implementations that have a set_ctx_params()
to call this function instead of just testing (params == NULL).This
detects the case wherean OSSL_PARAM array contains just a terminator
entry.

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/25499)
2024-10-09 11:13:46 +02:00

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/*
* Copyright 2019-2022 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
*/
/* We need to use some engine deprecated APIs */
#define OPENSSL_SUPPRESS_DEPRECATED
#include <openssl/evp.h>
#include <openssl/core_names.h>
#include <openssl/err.h>
#include <openssl/proverr.h>
#ifndef FIPS_MODULE
# include <openssl/engine.h>
# include "crypto/evp.h"
#endif
#include "prov/providercommon.h"
#include "prov/provider_util.h"
void ossl_prov_cipher_reset(PROV_CIPHER *pc)
{
EVP_CIPHER_free(pc->alloc_cipher);
pc->alloc_cipher = NULL;
pc->cipher = NULL;
#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
ENGINE_finish(pc->engine);
#endif
pc->engine = NULL;
}
int ossl_prov_cipher_copy(PROV_CIPHER *dst, const PROV_CIPHER *src)
{
if (src->alloc_cipher != NULL && !EVP_CIPHER_up_ref(src->alloc_cipher))
return 0;
#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
if (src->engine != NULL && !ENGINE_init(src->engine)) {
EVP_CIPHER_free(src->alloc_cipher);
return 0;
}
#endif
dst->engine = src->engine;
dst->cipher = src->cipher;
dst->alloc_cipher = src->alloc_cipher;
return 1;
}
static int load_common(const OSSL_PARAM params[], const char **propquery,
ENGINE **engine)
{
const OSSL_PARAM *p;
*propquery = NULL;
p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_PROPERTIES);
if (p != NULL) {
if (p->data_type != OSSL_PARAM_UTF8_STRING)
return 0;
*propquery = p->data;
}
#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
ENGINE_finish(*engine);
#endif
*engine = NULL;
/* Inside the FIPS module, we don't support legacy ciphers */
#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_ENGINE);
if (p != NULL) {
if (p->data_type != OSSL_PARAM_UTF8_STRING)
return 0;
/* Get a structural reference */
*engine = ENGINE_by_id(p->data);
if (*engine == NULL)
return 0;
/* Get a functional reference */
if (!ENGINE_init(*engine)) {
ENGINE_free(*engine);
*engine = NULL;
return 0;
}
/* Free the structural reference */
ENGINE_free(*engine);
}
#endif
return 1;
}
int ossl_prov_cipher_load_from_params(PROV_CIPHER *pc,
const OSSL_PARAM params[],
OSSL_LIB_CTX *ctx)
{
const OSSL_PARAM *p;
const char *propquery;
if (ossl_param_is_empty(params))
return 1;
if (!load_common(params, &propquery, &pc->engine))
return 0;
p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_CIPHER);
if (p == NULL)
return 1;
if (p->data_type != OSSL_PARAM_UTF8_STRING)
return 0;
EVP_CIPHER_free(pc->alloc_cipher);
ERR_set_mark();
pc->cipher = pc->alloc_cipher = EVP_CIPHER_fetch(ctx, p->data, propquery);
#ifndef FIPS_MODULE /* Inside the FIPS module, we don't support legacy ciphers */
if (pc->cipher == NULL) {
const EVP_CIPHER *cipher;
cipher = EVP_get_cipherbyname(p->data);
/* Do not use global EVP_CIPHERs */
if (cipher != NULL && cipher->origin != EVP_ORIG_GLOBAL)
pc->cipher = cipher;
}
#endif
if (pc->cipher != NULL)
ERR_pop_to_mark();
else
ERR_clear_last_mark();
return pc->cipher != NULL;
}
const EVP_CIPHER *ossl_prov_cipher_cipher(const PROV_CIPHER *pc)
{
return pc->cipher;
}
ENGINE *ossl_prov_cipher_engine(const PROV_CIPHER *pc)
{
return pc->engine;
}
void ossl_prov_digest_reset(PROV_DIGEST *pd)
{
EVP_MD_free(pd->alloc_md);
pd->alloc_md = NULL;
pd->md = NULL;
#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
ENGINE_finish(pd->engine);
#endif
pd->engine = NULL;
}
int ossl_prov_digest_copy(PROV_DIGEST *dst, const PROV_DIGEST *src)
{
if (src->alloc_md != NULL && !EVP_MD_up_ref(src->alloc_md))
return 0;
#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
if (src->engine != NULL && !ENGINE_init(src->engine)) {
EVP_MD_free(src->alloc_md);
return 0;
}
#endif
dst->engine = src->engine;
dst->md = src->md;
dst->alloc_md = src->alloc_md;
return 1;
}
const EVP_MD *ossl_prov_digest_fetch(PROV_DIGEST *pd, OSSL_LIB_CTX *libctx,
const char *mdname, const char *propquery)
{
EVP_MD_free(pd->alloc_md);
pd->md = pd->alloc_md = EVP_MD_fetch(libctx, mdname, propquery);
return pd->md;
}
int ossl_prov_digest_load_from_params(PROV_DIGEST *pd,
const OSSL_PARAM params[],
OSSL_LIB_CTX *ctx)
{
const OSSL_PARAM *p;
const char *propquery;
if (ossl_param_is_empty(params))
return 1;
if (!load_common(params, &propquery, &pd->engine))
return 0;
p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_DIGEST);
if (p == NULL)
return 1;
if (p->data_type != OSSL_PARAM_UTF8_STRING)
return 0;
ERR_set_mark();
ossl_prov_digest_fetch(pd, ctx, p->data, propquery);
#ifndef FIPS_MODULE /* Inside the FIPS module, we don't support legacy digests */
if (pd->md == NULL) {
const EVP_MD *md;
md = EVP_get_digestbyname(p->data);
/* Do not use global EVP_MDs */
if (md != NULL && md->origin != EVP_ORIG_GLOBAL)
pd->md = md;
}
#endif
if (pd->md != NULL)
ERR_pop_to_mark();
else
ERR_clear_last_mark();
return pd->md != NULL;
}
const EVP_MD *ossl_prov_digest_md(const PROV_DIGEST *pd)
{
return pd->md;
}
ENGINE *ossl_prov_digest_engine(const PROV_DIGEST *pd)
{
return pd->engine;
}
int ossl_prov_set_macctx(EVP_MAC_CTX *macctx,
const OSSL_PARAM params[],
const char *ciphername,
const char *mdname,
const char *engine,
const char *properties,
const unsigned char *key,
size_t keylen)
{
const OSSL_PARAM *p;
OSSL_PARAM mac_params[6], *mp = mac_params;
if (params != NULL) {
if (mdname == NULL) {
if ((p = OSSL_PARAM_locate_const(params,
OSSL_ALG_PARAM_DIGEST)) != NULL) {
if (p->data_type != OSSL_PARAM_UTF8_STRING)
return 0;
mdname = p->data;
}
}
if (ciphername == NULL) {
if ((p = OSSL_PARAM_locate_const(params,
OSSL_ALG_PARAM_CIPHER)) != NULL) {
if (p->data_type != OSSL_PARAM_UTF8_STRING)
return 0;
ciphername = p->data;
}
}
if (engine == NULL) {
if ((p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_ENGINE))
!= NULL) {
if (p->data_type != OSSL_PARAM_UTF8_STRING)
return 0;
engine = p->data;
}
}
}
if (mdname != NULL)
*mp++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST,
(char *)mdname, 0);
if (ciphername != NULL)
*mp++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_CIPHER,
(char *)ciphername, 0);
if (properties != NULL)
*mp++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_PROPERTIES,
(char *)properties, 0);
#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
if (engine != NULL)
*mp++ = OSSL_PARAM_construct_utf8_string(OSSL_ALG_PARAM_ENGINE,
(char *) engine, 0);
#endif
if (key != NULL)
*mp++ = OSSL_PARAM_construct_octet_string(OSSL_MAC_PARAM_KEY,
(unsigned char *)key,
keylen);
*mp = OSSL_PARAM_construct_end();
return EVP_MAC_CTX_set_params(macctx, mac_params);
}
int ossl_prov_macctx_load_from_params(EVP_MAC_CTX **macctx,
const OSSL_PARAM params[],
const char *macname,
const char *ciphername,
const char *mdname,
OSSL_LIB_CTX *libctx)
{
const OSSL_PARAM *p;
const char *properties = NULL;
if (macname == NULL
&& (p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_MAC)) != NULL) {
if (p->data_type != OSSL_PARAM_UTF8_STRING)
return 0;
macname = p->data;
}
if ((p = OSSL_PARAM_locate_const(params,
OSSL_ALG_PARAM_PROPERTIES)) != NULL) {
if (p->data_type != OSSL_PARAM_UTF8_STRING)
return 0;
properties = p->data;
}
/* If we got a new mac name, we make a new EVP_MAC_CTX */
if (macname != NULL) {
EVP_MAC *mac = EVP_MAC_fetch(libctx, macname, properties);
EVP_MAC_CTX_free(*macctx);
*macctx = mac == NULL ? NULL : EVP_MAC_CTX_new(mac);
/* The context holds on to the MAC */
EVP_MAC_free(mac);
if (*macctx == NULL)
return 0;
}
/*
* If there is no MAC yet (and therefore, no MAC context), we ignore
* all other parameters.
*/
if (*macctx == NULL)
return 1;
if (ossl_prov_set_macctx(*macctx, params, ciphername, mdname, NULL,
properties, NULL, 0))
return 1;
EVP_MAC_CTX_free(*macctx);
*macctx = NULL;
return 0;
}
void ossl_prov_cache_exported_algorithms(const OSSL_ALGORITHM_CAPABLE *in,
OSSL_ALGORITHM *out)
{
int i, j;
if (out[0].algorithm_names == NULL) {
for (i = j = 0; in[i].alg.algorithm_names != NULL; ++i) {
if (in[i].capable == NULL || in[i].capable())
out[j++] = in[i].alg;
}
out[j++] = in[i].alg;
}
}
/* Duplicate a lump of memory safely */
int ossl_prov_memdup(const void *src, size_t src_len,
unsigned char **dest, size_t *dest_len)
{
if (src != NULL) {
if ((*dest = OPENSSL_memdup(src, src_len)) == NULL)
return 0;
*dest_len = src_len;
} else {
*dest = NULL;
*dest_len = 0;
}
return 1;
}
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