mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
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303 lines
8.1 KiB
C
303 lines
8.1 KiB
C
/*
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* Copyright 2020-2023 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 "internal/deprecated.h"
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#include <openssl/core_names.h>
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#include <openssl/err.h>
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#include <openssl/ec.h>
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#include "crypto/evp.h"
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#include "crypto/ec.h"
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/*
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* This file is meant to contain functions to provide EVP_PKEY support for EC
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* keys.
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*/
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static ossl_inline
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int evp_pkey_ctx_getset_ecdh_param_checks(const EVP_PKEY_CTX *ctx)
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{
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if (ctx == NULL || !EVP_PKEY_CTX_IS_DERIVE_OP(ctx)) {
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ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
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/* Uses the same return values as EVP_PKEY_CTX_ctrl */
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return -2;
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}
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/* If key type not EC return error */
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if (evp_pkey_ctx_is_legacy(ctx)
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&& ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_EC)
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return -1;
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return 1;
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}
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int EVP_PKEY_CTX_set_ecdh_cofactor_mode(EVP_PKEY_CTX *ctx, int cofactor_mode)
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{
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int ret;
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OSSL_PARAM params[2], *p = params;
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ret = evp_pkey_ctx_getset_ecdh_param_checks(ctx);
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if (ret != 1)
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return ret;
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/*
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* Valid input values are:
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* * 0 for disable
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* * 1 for enable
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* * -1 for reset to default for associated priv key
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*/
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if (cofactor_mode < -1 || cofactor_mode > 1) {
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/* Uses the same return value of pkey_ec_ctrl() */
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return -2;
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}
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*p++ = OSSL_PARAM_construct_int(OSSL_EXCHANGE_PARAM_EC_ECDH_COFACTOR_MODE,
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&cofactor_mode);
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*p++ = OSSL_PARAM_construct_end();
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ret = evp_pkey_ctx_set_params_strict(ctx, params);
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if (ret == -2)
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ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
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return ret;
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}
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int EVP_PKEY_CTX_get_ecdh_cofactor_mode(EVP_PKEY_CTX *ctx)
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{
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int ret, mode;
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OSSL_PARAM params[2], *p = params;
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ret = evp_pkey_ctx_getset_ecdh_param_checks(ctx);
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if (ret != 1)
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return ret;
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*p++ = OSSL_PARAM_construct_int(OSSL_EXCHANGE_PARAM_EC_ECDH_COFACTOR_MODE,
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&mode);
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*p++ = OSSL_PARAM_construct_end();
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ret = evp_pkey_ctx_get_params_strict(ctx, params);
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switch (ret) {
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case -2:
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ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
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break;
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case 1:
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ret = mode;
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if (mode < 0 || mode > 1) {
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/*
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* The provider should return either 0 or 1, any other value is a
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* provider error.
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*/
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ret = -1;
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}
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break;
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default:
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ret = -1;
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break;
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}
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return ret;
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}
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/*
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* This one is currently implemented as an EVP_PKEY_CTX_ctrl() wrapper,
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* simply because that's easier.
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*/
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int EVP_PKEY_CTX_set_ecdh_kdf_type(EVP_PKEY_CTX *ctx, int kdf)
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{
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_EC_KDF_TYPE, kdf, NULL);
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}
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/*
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* This one is currently implemented as an EVP_PKEY_CTX_ctrl() wrapper,
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* simply because that's easier.
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*/
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int EVP_PKEY_CTX_get_ecdh_kdf_type(EVP_PKEY_CTX *ctx)
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{
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_EC_KDF_TYPE, -2, NULL);
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}
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/*
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* This one is currently implemented as an EVP_PKEY_CTX_ctrl() wrapper,
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* simply because that's easier.
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*/
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int EVP_PKEY_CTX_set_ecdh_kdf_md(EVP_PKEY_CTX *ctx, const EVP_MD *md)
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{
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_EC_KDF_MD, 0, (void *)(md));
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}
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/*
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* This one is currently implemented as an EVP_PKEY_CTX_ctrl() wrapper,
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* simply because that's easier.
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*/
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int EVP_PKEY_CTX_get_ecdh_kdf_md(EVP_PKEY_CTX *ctx, const EVP_MD **pmd)
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{
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_GET_EC_KDF_MD, 0, (void *)(pmd));
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}
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int EVP_PKEY_CTX_set_ecdh_kdf_outlen(EVP_PKEY_CTX *ctx, int outlen)
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{
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int ret;
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size_t len = outlen;
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OSSL_PARAM params[2], *p = params;
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ret = evp_pkey_ctx_getset_ecdh_param_checks(ctx);
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if (ret != 1)
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return ret;
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if (outlen <= 0) {
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/*
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* This would ideally be -1 or 0, but we have to retain compatibility
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* with legacy behaviour of EVP_PKEY_CTX_ctrl() which returned -2 if
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* in <= 0
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*/
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return -2;
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}
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*p++ = OSSL_PARAM_construct_size_t(OSSL_EXCHANGE_PARAM_KDF_OUTLEN,
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&len);
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*p++ = OSSL_PARAM_construct_end();
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ret = evp_pkey_ctx_set_params_strict(ctx, params);
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if (ret == -2)
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ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
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return ret;
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}
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int EVP_PKEY_CTX_get_ecdh_kdf_outlen(EVP_PKEY_CTX *ctx, int *plen)
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{
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size_t len = UINT_MAX;
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int ret;
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OSSL_PARAM params[2], *p = params;
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ret = evp_pkey_ctx_getset_ecdh_param_checks(ctx);
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if (ret != 1)
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return ret;
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*p++ = OSSL_PARAM_construct_size_t(OSSL_EXCHANGE_PARAM_KDF_OUTLEN,
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&len);
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*p++ = OSSL_PARAM_construct_end();
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ret = evp_pkey_ctx_get_params_strict(ctx, params);
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switch (ret) {
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case -2:
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ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
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break;
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case 1:
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if (len <= INT_MAX)
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*plen = (int)len;
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else
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ret = -1;
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break;
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default:
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ret = -1;
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break;
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}
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return ret;
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}
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int EVP_PKEY_CTX_set0_ecdh_kdf_ukm(EVP_PKEY_CTX *ctx, unsigned char *ukm, int len)
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{
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int ret;
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OSSL_PARAM params[2], *p = params;
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ret = evp_pkey_ctx_getset_ecdh_param_checks(ctx);
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if (ret != 1)
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return ret;
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*p++ = OSSL_PARAM_construct_octet_string(OSSL_EXCHANGE_PARAM_KDF_UKM,
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/*
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* Cast away the const. This is read
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* only so should be safe
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*/
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(void *)ukm,
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(size_t)len);
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*p++ = OSSL_PARAM_construct_end();
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ret = evp_pkey_ctx_set_params_strict(ctx, params);
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switch (ret) {
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case -2:
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ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
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break;
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case 1:
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OPENSSL_free(ukm);
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break;
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}
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return ret;
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}
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#ifndef OPENSSL_NO_DEPRECATED_3_0
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int EVP_PKEY_CTX_get0_ecdh_kdf_ukm(EVP_PKEY_CTX *ctx, unsigned char **pukm)
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{
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size_t ukmlen;
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int ret;
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OSSL_PARAM params[2], *p = params;
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ret = evp_pkey_ctx_getset_ecdh_param_checks(ctx);
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if (ret != 1)
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return ret;
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*p++ = OSSL_PARAM_construct_octet_ptr(OSSL_EXCHANGE_PARAM_KDF_UKM,
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(void **)pukm, 0);
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*p++ = OSSL_PARAM_construct_end();
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ret = evp_pkey_ctx_get_params_strict(ctx, params);
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switch (ret) {
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case -2:
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ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
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break;
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case 1:
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ret = -1;
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ukmlen = params[0].return_size;
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if (ukmlen <= INT_MAX)
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ret = (int)ukmlen;
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break;
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default:
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ret = -1;
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break;
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}
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return ret;
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}
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#endif
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#ifndef FIPS_MODULE
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/*
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* This one is currently implemented as an EVP_PKEY_CTX_ctrl() wrapper,
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* simply because that's easier.
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* ASN1_OBJECT (which would be converted to text internally)?
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*/
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int EVP_PKEY_CTX_set_ec_paramgen_curve_nid(EVP_PKEY_CTX *ctx, int nid)
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{
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int keytype = nid == EVP_PKEY_SM2 ? EVP_PKEY_SM2 : EVP_PKEY_EC;
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return EVP_PKEY_CTX_ctrl(ctx, keytype, EVP_PKEY_OP_TYPE_GEN,
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EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID,
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nid, NULL);
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}
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/*
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* This one is currently implemented as an EVP_PKEY_CTX_ctrl() wrapper,
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* simply because that's easier.
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*/
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int EVP_PKEY_CTX_set_ec_param_enc(EVP_PKEY_CTX *ctx, int param_enc)
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{
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC, EVP_PKEY_OP_TYPE_GEN,
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EVP_PKEY_CTRL_EC_PARAM_ENC, param_enc, NULL);
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}
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#endif
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