mirror of
https://github.com/openssl/openssl.git
synced 2024-12-15 06:01:37 +08:00
e077455e9e
Since OPENSSL_malloc() and friends report ERR_R_MALLOC_FAILURE, and
at least handle the file name and line number they are called from,
there's no need to report ERR_R_MALLOC_FAILURE where they are called
directly, or when SSLfatal() and RLAYERfatal() is used, the reason
`ERR_R_MALLOC_FAILURE` is changed to `ERR_R_CRYPTO_LIB`.
There were a number of places where `ERR_R_MALLOC_FAILURE` was reported
even though it was a function from a different sub-system that was
called. Those places are changed to report ERR_R_{lib}_LIB, where
{lib} is the name of that sub-system.
Some of them are tricky to get right, as we have a lot of functions
that belong in the ASN1 sub-system, and all the `sk_` calls or from
the CRYPTO sub-system.
Some extra adaptation was necessary where there were custom OPENSSL_malloc()
wrappers, and some bugs are fixed alongside these changes.
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19301)
602 lines
19 KiB
C
602 lines
19 KiB
C
/*
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* Copyright 2019-2022 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <openssl/crypto.h>
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#include <openssl/evp.h>
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#include <openssl/err.h>
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#include "internal/cryptlib.h"
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#include "internal/refcount.h"
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#include "internal/provider.h"
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#include "internal/core.h"
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#include "internal/numbers.h" /* includes SIZE_MAX */
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#include "crypto/evp.h"
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#include "evp_local.h"
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static EVP_KEYEXCH *evp_keyexch_new(OSSL_PROVIDER *prov)
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{
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EVP_KEYEXCH *exchange = OPENSSL_zalloc(sizeof(EVP_KEYEXCH));
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if (exchange == NULL)
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return NULL;
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exchange->lock = CRYPTO_THREAD_lock_new();
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if (exchange->lock == NULL) {
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ERR_raise(ERR_LIB_EVP, ERR_R_CRYPTO_LIB);
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OPENSSL_free(exchange);
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return NULL;
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}
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exchange->prov = prov;
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ossl_provider_up_ref(prov);
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exchange->refcnt = 1;
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return exchange;
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}
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static void *evp_keyexch_from_algorithm(int name_id,
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const OSSL_ALGORITHM *algodef,
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OSSL_PROVIDER *prov)
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{
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const OSSL_DISPATCH *fns = algodef->implementation;
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EVP_KEYEXCH *exchange = NULL;
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int fncnt = 0, sparamfncnt = 0, gparamfncnt = 0;
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if ((exchange = evp_keyexch_new(prov)) == NULL) {
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ERR_raise(ERR_LIB_EVP, ERR_R_EVP_LIB);
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goto err;
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}
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exchange->name_id = name_id;
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if ((exchange->type_name = ossl_algorithm_get1_first_name(algodef)) == NULL)
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goto err;
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exchange->description = algodef->algorithm_description;
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for (; fns->function_id != 0; fns++) {
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switch (fns->function_id) {
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case OSSL_FUNC_KEYEXCH_NEWCTX:
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if (exchange->newctx != NULL)
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break;
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exchange->newctx = OSSL_FUNC_keyexch_newctx(fns);
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fncnt++;
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break;
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case OSSL_FUNC_KEYEXCH_INIT:
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if (exchange->init != NULL)
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break;
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exchange->init = OSSL_FUNC_keyexch_init(fns);
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fncnt++;
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break;
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case OSSL_FUNC_KEYEXCH_SET_PEER:
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if (exchange->set_peer != NULL)
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break;
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exchange->set_peer = OSSL_FUNC_keyexch_set_peer(fns);
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break;
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case OSSL_FUNC_KEYEXCH_DERIVE:
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if (exchange->derive != NULL)
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break;
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exchange->derive = OSSL_FUNC_keyexch_derive(fns);
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fncnt++;
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break;
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case OSSL_FUNC_KEYEXCH_FREECTX:
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if (exchange->freectx != NULL)
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break;
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exchange->freectx = OSSL_FUNC_keyexch_freectx(fns);
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fncnt++;
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break;
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case OSSL_FUNC_KEYEXCH_DUPCTX:
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if (exchange->dupctx != NULL)
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break;
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exchange->dupctx = OSSL_FUNC_keyexch_dupctx(fns);
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break;
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case OSSL_FUNC_KEYEXCH_GET_CTX_PARAMS:
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if (exchange->get_ctx_params != NULL)
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break;
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exchange->get_ctx_params = OSSL_FUNC_keyexch_get_ctx_params(fns);
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gparamfncnt++;
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break;
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case OSSL_FUNC_KEYEXCH_GETTABLE_CTX_PARAMS:
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if (exchange->gettable_ctx_params != NULL)
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break;
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exchange->gettable_ctx_params
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= OSSL_FUNC_keyexch_gettable_ctx_params(fns);
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gparamfncnt++;
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break;
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case OSSL_FUNC_KEYEXCH_SET_CTX_PARAMS:
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if (exchange->set_ctx_params != NULL)
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break;
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exchange->set_ctx_params = OSSL_FUNC_keyexch_set_ctx_params(fns);
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sparamfncnt++;
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break;
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case OSSL_FUNC_KEYEXCH_SETTABLE_CTX_PARAMS:
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if (exchange->settable_ctx_params != NULL)
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break;
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exchange->settable_ctx_params
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= OSSL_FUNC_keyexch_settable_ctx_params(fns);
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sparamfncnt++;
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break;
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}
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}
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if (fncnt != 4
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|| (gparamfncnt != 0 && gparamfncnt != 2)
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|| (sparamfncnt != 0 && sparamfncnt != 2)) {
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/*
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* In order to be a consistent set of functions we must have at least
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* a complete set of "exchange" functions: init, derive, newctx,
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* and freectx. The set_ctx_params and settable_ctx_params functions are
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* optional, but if one of them is present then the other one must also
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* be present. Same goes for get_ctx_params and gettable_ctx_params.
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* The dupctx and set_peer functions are optional.
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*/
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ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_PROVIDER_FUNCTIONS);
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goto err;
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}
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return exchange;
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err:
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EVP_KEYEXCH_free(exchange);
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return NULL;
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}
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void EVP_KEYEXCH_free(EVP_KEYEXCH *exchange)
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{
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int i;
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if (exchange == NULL)
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return;
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CRYPTO_DOWN_REF(&exchange->refcnt, &i, exchange->lock);
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if (i > 0)
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return;
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OPENSSL_free(exchange->type_name);
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ossl_provider_free(exchange->prov);
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CRYPTO_THREAD_lock_free(exchange->lock);
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OPENSSL_free(exchange);
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}
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int EVP_KEYEXCH_up_ref(EVP_KEYEXCH *exchange)
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{
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int ref = 0;
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CRYPTO_UP_REF(&exchange->refcnt, &ref, exchange->lock);
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return 1;
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}
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OSSL_PROVIDER *EVP_KEYEXCH_get0_provider(const EVP_KEYEXCH *exchange)
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{
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return exchange->prov;
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}
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EVP_KEYEXCH *EVP_KEYEXCH_fetch(OSSL_LIB_CTX *ctx, const char *algorithm,
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const char *properties)
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{
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return evp_generic_fetch(ctx, OSSL_OP_KEYEXCH, algorithm, properties,
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evp_keyexch_from_algorithm,
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(int (*)(void *))EVP_KEYEXCH_up_ref,
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(void (*)(void *))EVP_KEYEXCH_free);
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}
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EVP_KEYEXCH *evp_keyexch_fetch_from_prov(OSSL_PROVIDER *prov,
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const char *algorithm,
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const char *properties)
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{
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return evp_generic_fetch_from_prov(prov, OSSL_OP_KEYEXCH,
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algorithm, properties,
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evp_keyexch_from_algorithm,
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(int (*)(void *))EVP_KEYEXCH_up_ref,
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(void (*)(void *))EVP_KEYEXCH_free);
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}
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int EVP_PKEY_derive_init(EVP_PKEY_CTX *ctx)
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{
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return EVP_PKEY_derive_init_ex(ctx, NULL);
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}
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int EVP_PKEY_derive_init_ex(EVP_PKEY_CTX *ctx, const OSSL_PARAM params[])
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{
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int ret;
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void *provkey = NULL;
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EVP_KEYEXCH *exchange = NULL;
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EVP_KEYMGMT *tmp_keymgmt = NULL;
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const OSSL_PROVIDER *tmp_prov = NULL;
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const char *supported_exch = NULL;
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int iter;
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if (ctx == NULL) {
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ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
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return -2;
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}
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evp_pkey_ctx_free_old_ops(ctx);
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ctx->operation = EVP_PKEY_OP_DERIVE;
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ERR_set_mark();
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if (evp_pkey_ctx_is_legacy(ctx))
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goto legacy;
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/*
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* Some algorithms (e.g. legacy KDFs) don't have a pkey - so we create
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* a blank one.
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*/
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if (ctx->pkey == NULL) {
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EVP_PKEY *pkey = EVP_PKEY_new();
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if (pkey == NULL
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|| !EVP_PKEY_set_type_by_keymgmt(pkey, ctx->keymgmt)
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|| (pkey->keydata = evp_keymgmt_newdata(ctx->keymgmt)) == NULL) {
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ERR_clear_last_mark();
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EVP_PKEY_free(pkey);
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ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
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goto err;
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}
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ctx->pkey = pkey;
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}
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/*
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* Try to derive the supported exch from |ctx->keymgmt|.
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*/
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if (!ossl_assert(ctx->pkey->keymgmt == NULL
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|| ctx->pkey->keymgmt == ctx->keymgmt)) {
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ERR_clear_last_mark();
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ERR_raise(ERR_LIB_EVP, ERR_R_INTERNAL_ERROR);
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goto err;
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}
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supported_exch = evp_keymgmt_util_query_operation_name(ctx->keymgmt,
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OSSL_OP_KEYEXCH);
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if (supported_exch == NULL) {
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ERR_clear_last_mark();
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ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
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goto err;
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}
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/*
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* We perform two iterations:
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*
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* 1. Do the normal exchange fetch, using the fetching data given by
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* the EVP_PKEY_CTX.
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* 2. Do the provider specific exchange fetch, from the same provider
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* as |ctx->keymgmt|
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*
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* We then try to fetch the keymgmt from the same provider as the
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* exchange, and try to export |ctx->pkey| to that keymgmt (when
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* this keymgmt happens to be the same as |ctx->keymgmt|, the export
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* is a no-op, but we call it anyway to not complicate the code even
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* more).
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* If the export call succeeds (returns a non-NULL provider key pointer),
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* we're done and can perform the operation itself. If not, we perform
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* the second iteration, or jump to legacy.
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*/
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for (iter = 1, provkey = NULL; iter < 3 && provkey == NULL; iter++) {
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EVP_KEYMGMT *tmp_keymgmt_tofree = NULL;
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/*
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* If we're on the second iteration, free the results from the first.
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* They are NULL on the first iteration, so no need to check what
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* iteration we're on.
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*/
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EVP_KEYEXCH_free(exchange);
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EVP_KEYMGMT_free(tmp_keymgmt);
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switch (iter) {
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case 1:
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exchange =
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EVP_KEYEXCH_fetch(ctx->libctx, supported_exch, ctx->propquery);
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if (exchange != NULL)
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tmp_prov = EVP_KEYEXCH_get0_provider(exchange);
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break;
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case 2:
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tmp_prov = EVP_KEYMGMT_get0_provider(ctx->keymgmt);
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exchange =
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evp_keyexch_fetch_from_prov((OSSL_PROVIDER *)tmp_prov,
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supported_exch, ctx->propquery);
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if (exchange == NULL)
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goto legacy;
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break;
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}
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if (exchange == NULL)
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continue;
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/*
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* Ensure that the key is provided, either natively, or as a cached
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* export. We start by fetching the keymgmt with the same name as
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* |ctx->keymgmt|, but from the provider of the exchange method, using
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* the same property query as when fetching the exchange method.
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* With the keymgmt we found (if we did), we try to export |ctx->pkey|
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* to it (evp_pkey_export_to_provider() is smart enough to only actually
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* export it if |tmp_keymgmt| is different from |ctx->pkey|'s keymgmt)
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*/
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tmp_keymgmt_tofree = tmp_keymgmt =
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evp_keymgmt_fetch_from_prov((OSSL_PROVIDER *)tmp_prov,
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EVP_KEYMGMT_get0_name(ctx->keymgmt),
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ctx->propquery);
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if (tmp_keymgmt != NULL)
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provkey = evp_pkey_export_to_provider(ctx->pkey, ctx->libctx,
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&tmp_keymgmt, ctx->propquery);
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if (tmp_keymgmt == NULL)
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EVP_KEYMGMT_free(tmp_keymgmt_tofree);
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}
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if (provkey == NULL) {
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EVP_KEYEXCH_free(exchange);
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goto legacy;
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}
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ERR_pop_to_mark();
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/* No more legacy from here down to legacy: */
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/* A Coverity false positive with up_ref/down_ref and free */
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/* coverity[use_after_free] */
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ctx->op.kex.exchange = exchange;
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/* A Coverity false positive with up_ref/down_ref and free */
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/* coverity[deref_arg] */
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ctx->op.kex.algctx = exchange->newctx(ossl_provider_ctx(exchange->prov));
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if (ctx->op.kex.algctx == NULL) {
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/* The provider key can stay in the cache */
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ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
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goto err;
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}
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ret = exchange->init(ctx->op.kex.algctx, provkey, params);
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EVP_KEYMGMT_free(tmp_keymgmt);
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return ret ? 1 : 0;
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err:
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evp_pkey_ctx_free_old_ops(ctx);
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ctx->operation = EVP_PKEY_OP_UNDEFINED;
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EVP_KEYMGMT_free(tmp_keymgmt);
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return 0;
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legacy:
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/*
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* If we don't have the full support we need with provided methods,
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* let's go see if legacy does.
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*/
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ERR_pop_to_mark();
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#ifdef FIPS_MODULE
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return 0;
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#else
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if (ctx->pmeth == NULL || ctx->pmeth->derive == NULL) {
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ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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if (ctx->pmeth->derive_init == NULL)
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return 1;
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ret = ctx->pmeth->derive_init(ctx);
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if (ret <= 0)
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ctx->operation = EVP_PKEY_OP_UNDEFINED;
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EVP_KEYMGMT_free(tmp_keymgmt);
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return ret;
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#endif
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}
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int EVP_PKEY_derive_set_peer_ex(EVP_PKEY_CTX *ctx, EVP_PKEY *peer,
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int validate_peer)
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{
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int ret = 0, check;
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void *provkey = NULL;
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EVP_PKEY_CTX *check_ctx = NULL;
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EVP_KEYMGMT *tmp_keymgmt = NULL, *tmp_keymgmt_tofree = NULL;
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if (ctx == NULL) {
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ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
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return -1;
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}
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if (!EVP_PKEY_CTX_IS_DERIVE_OP(ctx) || ctx->op.kex.algctx == NULL)
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goto legacy;
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if (ctx->op.kex.exchange->set_peer == NULL) {
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ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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if (validate_peer) {
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check_ctx = EVP_PKEY_CTX_new_from_pkey(ctx->libctx, peer, ctx->propquery);
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if (check_ctx == NULL)
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return -1;
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check = EVP_PKEY_public_check(check_ctx);
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EVP_PKEY_CTX_free(check_ctx);
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if (check <= 0)
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return -1;
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}
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/*
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* Ensure that the |peer| is provided, either natively, or as a cached
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* export. We start by fetching the keymgmt with the same name as
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* |ctx->keymgmt|, but from the provider of the exchange method, using
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* the same property query as when fetching the exchange method.
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* With the keymgmt we found (if we did), we try to export |peer|
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* to it (evp_pkey_export_to_provider() is smart enough to only actually
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* export it if |tmp_keymgmt| is different from |peer|'s keymgmt)
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*/
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tmp_keymgmt_tofree = tmp_keymgmt =
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evp_keymgmt_fetch_from_prov((OSSL_PROVIDER *)
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EVP_KEYEXCH_get0_provider(ctx->op.kex.exchange),
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EVP_KEYMGMT_get0_name(ctx->keymgmt),
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ctx->propquery);
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if (tmp_keymgmt != NULL)
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/* A Coverity issue with up_ref/down_ref and free */
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/* coverity[pass_freed_arg] */
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provkey = evp_pkey_export_to_provider(peer, ctx->libctx,
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&tmp_keymgmt, ctx->propquery);
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EVP_KEYMGMT_free(tmp_keymgmt_tofree);
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/*
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* If making the key provided wasn't possible, legacy may be able to pick
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* it up
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*/
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if (provkey == NULL)
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goto legacy;
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return ctx->op.kex.exchange->set_peer(ctx->op.kex.algctx, provkey);
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legacy:
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#ifdef FIPS_MODULE
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return ret;
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#else
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if (ctx->pmeth == NULL
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|| !(ctx->pmeth->derive != NULL
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|| ctx->pmeth->encrypt != NULL
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|| ctx->pmeth->decrypt != NULL)
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|| ctx->pmeth->ctrl == NULL) {
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ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
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return -2;
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}
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if (ctx->operation != EVP_PKEY_OP_DERIVE
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&& ctx->operation != EVP_PKEY_OP_ENCRYPT
|
|
&& ctx->operation != EVP_PKEY_OP_DECRYPT) {
|
|
ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
|
|
return -1;
|
|
}
|
|
|
|
ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 0, peer);
|
|
|
|
if (ret <= 0)
|
|
return ret;
|
|
|
|
if (ret == 2)
|
|
return 1;
|
|
|
|
if (ctx->pkey == NULL) {
|
|
ERR_raise(ERR_LIB_EVP, EVP_R_NO_KEY_SET);
|
|
return -1;
|
|
}
|
|
|
|
if (ctx->pkey->type != peer->type) {
|
|
ERR_raise(ERR_LIB_EVP, EVP_R_DIFFERENT_KEY_TYPES);
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* For clarity. The error is if parameters in peer are
|
|
* present (!missing) but don't match. EVP_PKEY_parameters_eq may return
|
|
* 1 (match), 0 (don't match) and -2 (comparison is not defined). -1
|
|
* (different key types) is impossible here because it is checked earlier.
|
|
* -2 is OK for us here, as well as 1, so we can check for 0 only.
|
|
*/
|
|
if (!EVP_PKEY_missing_parameters(peer) &&
|
|
!EVP_PKEY_parameters_eq(ctx->pkey, peer)) {
|
|
ERR_raise(ERR_LIB_EVP, EVP_R_DIFFERENT_PARAMETERS);
|
|
return -1;
|
|
}
|
|
|
|
EVP_PKEY_free(ctx->peerkey);
|
|
ctx->peerkey = peer;
|
|
|
|
ret = ctx->pmeth->ctrl(ctx, EVP_PKEY_CTRL_PEER_KEY, 1, peer);
|
|
|
|
if (ret <= 0) {
|
|
ctx->peerkey = NULL;
|
|
return ret;
|
|
}
|
|
|
|
EVP_PKEY_up_ref(peer);
|
|
return 1;
|
|
#endif
|
|
}
|
|
|
|
int EVP_PKEY_derive_set_peer(EVP_PKEY_CTX *ctx, EVP_PKEY *peer)
|
|
{
|
|
return EVP_PKEY_derive_set_peer_ex(ctx, peer, 1);
|
|
}
|
|
|
|
int EVP_PKEY_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *pkeylen)
|
|
{
|
|
int ret;
|
|
|
|
if (ctx == NULL || pkeylen == NULL) {
|
|
ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
|
|
return -1;
|
|
}
|
|
|
|
if (!EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
|
|
ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
|
|
return -1;
|
|
}
|
|
|
|
if (ctx->op.kex.algctx == NULL)
|
|
goto legacy;
|
|
|
|
ret = ctx->op.kex.exchange->derive(ctx->op.kex.algctx, key, pkeylen,
|
|
key != NULL ? *pkeylen : 0);
|
|
|
|
return ret;
|
|
legacy:
|
|
if (ctx->pmeth == NULL || ctx->pmeth->derive == NULL) {
|
|
ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
|
|
return -2;
|
|
}
|
|
|
|
M_check_autoarg(ctx, key, pkeylen, EVP_F_EVP_PKEY_DERIVE)
|
|
return ctx->pmeth->derive(ctx, key, pkeylen);
|
|
}
|
|
|
|
int evp_keyexch_get_number(const EVP_KEYEXCH *keyexch)
|
|
{
|
|
return keyexch->name_id;
|
|
}
|
|
|
|
const char *EVP_KEYEXCH_get0_name(const EVP_KEYEXCH *keyexch)
|
|
{
|
|
return keyexch->type_name;
|
|
}
|
|
|
|
const char *EVP_KEYEXCH_get0_description(const EVP_KEYEXCH *keyexch)
|
|
{
|
|
return keyexch->description;
|
|
}
|
|
|
|
int EVP_KEYEXCH_is_a(const EVP_KEYEXCH *keyexch, const char *name)
|
|
{
|
|
return keyexch != NULL
|
|
&& evp_is_a(keyexch->prov, keyexch->name_id, NULL, name);
|
|
}
|
|
|
|
void EVP_KEYEXCH_do_all_provided(OSSL_LIB_CTX *libctx,
|
|
void (*fn)(EVP_KEYEXCH *keyexch, void *arg),
|
|
void *arg)
|
|
{
|
|
evp_generic_do_all(libctx, OSSL_OP_KEYEXCH,
|
|
(void (*)(void *, void *))fn, arg,
|
|
evp_keyexch_from_algorithm,
|
|
(int (*)(void *))EVP_KEYEXCH_up_ref,
|
|
(void (*)(void *))EVP_KEYEXCH_free);
|
|
}
|
|
|
|
int EVP_KEYEXCH_names_do_all(const EVP_KEYEXCH *keyexch,
|
|
void (*fn)(const char *name, void *data),
|
|
void *data)
|
|
{
|
|
if (keyexch->prov != NULL)
|
|
return evp_names_do_all(keyexch->prov, keyexch->name_id, fn, data);
|
|
|
|
return 1;
|
|
}
|
|
|
|
const OSSL_PARAM *EVP_KEYEXCH_gettable_ctx_params(const EVP_KEYEXCH *keyexch)
|
|
{
|
|
void *provctx;
|
|
|
|
if (keyexch == NULL || keyexch->gettable_ctx_params == NULL)
|
|
return NULL;
|
|
|
|
provctx = ossl_provider_ctx(EVP_KEYEXCH_get0_provider(keyexch));
|
|
return keyexch->gettable_ctx_params(NULL, provctx);
|
|
}
|
|
|
|
const OSSL_PARAM *EVP_KEYEXCH_settable_ctx_params(const EVP_KEYEXCH *keyexch)
|
|
{
|
|
void *provctx;
|
|
|
|
if (keyexch == NULL || keyexch->settable_ctx_params == NULL)
|
|
return NULL;
|
|
provctx = ossl_provider_ctx(EVP_KEYEXCH_get0_provider(keyexch));
|
|
return keyexch->settable_ctx_params(NULL, provctx);
|
|
}
|