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7229a2f4ab
Fixes #12852 Reviewed-by: Nicola Tuveri <nic.tuv@gmail.com> Reviewed-by: Shane Lontis <shane.lontis@oracle.com> (Merged from https://github.com/openssl/openssl/pull/12853)
487 lines
15 KiB
C
487 lines
15 KiB
C
/*
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* Copyright 2020 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 <string.h>
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#include <openssl/err.h>
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#include <openssl/opensslv.h>
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#include <openssl/core_names.h>
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#include "crypto/evp.h"
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#include "ec_local.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 (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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/* TODO(3.0): Remove this eventually when no more legacy */
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if (ctx->op.kex.exchprovctx == NULL)
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC,
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EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_EC_ECDH_COFACTOR,
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cofactor_mode, NULL);
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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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/* Uses the same return values as EVP_PKEY_CTX_ctrl */
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return -2;
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}
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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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/* TODO(3.0): Remove this eventually when no more legacy */
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if (ctx->op.kex.exchprovctx == NULL)
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC,
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EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_EC_ECDH_COFACTOR, -2, NULL);
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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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if (ret == -2) {
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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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} else if (ret != 1) {
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return -1;
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}
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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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return -1;
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}
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return mode;
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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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int ret;
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const char *kdf_type;
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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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switch (kdf) {
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case EVP_PKEY_ECDH_KDF_NONE:
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kdf_type = "";
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break;
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case EVP_PKEY_ECDH_KDF_X9_63:
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kdf_type = OSSL_KDF_NAME_X963KDF;
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break;
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default:
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return -2;
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}
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/* TODO(3.0): Remove this eventually when no more legacy */
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if (ctx->op.kex.exchprovctx == NULL)
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC,
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EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_EC_KDF_TYPE, kdf, NULL);
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*p++ = OSSL_PARAM_construct_utf8_string(OSSL_EXCHANGE_PARAM_KDF_TYPE,
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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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(char *)kdf_type, 0);
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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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/* Uses the same return values as EVP_PKEY_CTX_ctrl */
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return -2;
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}
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return ret;
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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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int ret;
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/* 80 should be big enough */
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char kdf_type[80];
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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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/* TODO(3.0): Remove this eventually when no more legacy */
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if (ctx->op.kex.exchprovctx == NULL)
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC,
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EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_EC_KDF_TYPE, -2, NULL);
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*p++ = OSSL_PARAM_construct_utf8_string(OSSL_EXCHANGE_PARAM_KDF_TYPE,
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kdf_type, sizeof(kdf_type));
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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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if (ret == -2) {
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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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} else if (ret != 1) {
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return -1;
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}
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if (kdf_type[0] == '\0')
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return EVP_PKEY_ECDH_KDF_NONE;
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else if (strcmp(kdf_type, OSSL_KDF_NAME_X963KDF) == 0)
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return EVP_PKEY_ECDH_KDF_X9_63;
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return -1;
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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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int ret;
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OSSL_PARAM params[2], *p = params;
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const char *md_name = NULL;
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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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/* TODO(3.0): Remove this eventually when no more legacy */
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if (ctx->op.kex.exchprovctx == NULL)
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC,
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EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_EC_KDF_MD, 0, (void *)(md));
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md_name = (md == NULL) ? "" : EVP_MD_name(md);
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*p++ = OSSL_PARAM_construct_utf8_string(OSSL_EXCHANGE_PARAM_KDF_DIGEST,
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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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(char *)md_name, 0);
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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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/* Uses the same return values as EVP_PKEY_CTX_ctrl */
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return -2;
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}
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return ret;
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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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/* 80 should be big enough */
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char name[80] = "";
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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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/* TODO(3.0): Remove this eventually when no more legacy */
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if (ctx->op.kex.exchprovctx == NULL)
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC,
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EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_GET_EC_KDF_MD, 0, (void *)(pmd));
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*p++ = OSSL_PARAM_construct_utf8_string(OSSL_EXCHANGE_PARAM_KDF_DIGEST,
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name, sizeof(name));
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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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if (ret == -2) {
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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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} else if (ret != 1) {
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return -1;
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}
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/* May be NULL meaning "unknown" */
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*pmd = EVP_get_digestbyname(name);
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return 1;
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}
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int EVP_PKEY_CTX_set_ecdh_kdf_outlen(EVP_PKEY_CTX *ctx, int in)
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{
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int ret;
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size_t len = in;
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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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/* TODO(3.0): Remove this eventually when no more legacy */
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if (ctx->op.kex.exchprovctx == NULL)
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC,
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EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_EC_KDF_OUTLEN, in, NULL);
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if (in <= 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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/* Uses the same return values as EVP_PKEY_CTX_ctrl */
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return -2;
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}
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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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/* TODO(3.0): Remove this eventually when no more legacy */
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if (ctx->op.kex.exchprovctx == NULL)
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC,
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EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_GET_EC_KDF_OUTLEN, 0,
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(void *)(plen));
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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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if (ret == -2) {
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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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} else if (ret != 1) {
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return -1;
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}
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if (len > INT_MAX)
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return -1;
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*plen = (int)len;
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return 1;
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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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/* TODO(3.0): Remove this eventually when no more legacy */
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if (ctx->op.kex.exchprovctx == NULL)
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC,
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EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_EC_KDF_UKM, len, (void *)(ukm));
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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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if (ret == -2) {
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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 (ret == 1)
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OPENSSL_free(ukm);
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return ret;
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}
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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[3], *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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/* TODO(3.0): Remove this eventually when no more legacy */
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if (ctx->op.kex.exchprovctx == NULL)
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC,
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EVP_PKEY_OP_DERIVE,
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EVP_PKEY_CTRL_GET_EC_KDF_UKM, 0,
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(void *)(pukm));
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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_size_t(OSSL_EXCHANGE_PARAM_KDF_UKM_LEN,
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&ukmlen);
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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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if (ret == -2) {
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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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} else if (ret != 1) {
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return -1;
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}
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if (ukmlen > INT_MAX)
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return -1;
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return (int)ukmlen;
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}
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#ifndef FIPS_MODULE
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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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if (ctx == NULL || !EVP_PKEY_CTX_IS_GEN_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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/* Legacy: if key type not EC return error */
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if (ctx->pmeth != NULL
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&& EVP_PKEY_type(ctx->pmeth->pkey_id) != EVP_PKEY_EC)
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return -1;
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if (ctx->op.keymgmt.genctx == NULL)
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return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC,
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EVP_PKEY_OP_PARAMGEN|EVP_PKEY_OP_KEYGEN,
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EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID,
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nid, NULL);
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return EVP_PKEY_CTX_set_group_name(ctx, OBJ_nid2sn(nid));
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}
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int evp_pkey_ctx_set_ec_param_enc_prov(EVP_PKEY_CTX *ctx, int param_enc)
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{
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const char *enc = NULL;
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OSSL_PARAM params[2], *p = params;
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int ret = -2; /* Assume unsupported */
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if (ctx == NULL
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|| !EVP_PKEY_CTX_IS_GEN_OP(ctx)
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|| ctx->op.keymgmt.genctx == NULL)
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goto end;
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switch (param_enc) {
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case OPENSSL_EC_EXPLICIT_CURVE:
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enc = OSSL_PKEY_EC_ENCODING_EXPLICIT;
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break;
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case OPENSSL_EC_NAMED_CURVE:
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enc = OSSL_PKEY_EC_ENCODING_GROUP;
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break;
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default:
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goto end;
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}
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*p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_EC_ENCODING,
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(char *)enc, 0);
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*p++ = OSSL_PARAM_construct_end();
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|
ret = evp_pkey_ctx_set_params_strict(ctx, params);
|
|
end:
|
|
if (ret == -2)
|
|
ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
|
|
return ret;
|
|
}
|
|
|
|
int EVP_PKEY_CTX_set_ec_param_enc(EVP_PKEY_CTX *ctx, int param_enc)
|
|
{
|
|
return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_EC,
|
|
EVP_PKEY_OP_PARAMGEN|EVP_PKEY_OP_KEYGEN,
|
|
EVP_PKEY_CTRL_EC_PARAM_ENC, param_enc, NULL);
|
|
}
|
|
#endif
|