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/* $OpenBSD: pmeth_gn.c,v 1.7 2021/11/18 18:05:27 tb Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project 2006.
*/
/* ====================================================================
* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <openssl/bn.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/objects.h>
#include "evp_locl.h"
int
EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx)
{
int ret;
if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return -2;
}
ctx->operation = EVP_PKEY_OP_PARAMGEN;
if (!ctx->pmeth->paramgen_init)
return 1;
ret = ctx->pmeth->paramgen_init(ctx);
if (ret <= 0)
ctx->operation = EVP_PKEY_OP_UNDEFINED;
return ret;
}
int
EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
{
int ret;
if (!ctx || !ctx->pmeth || !ctx->pmeth->paramgen) {
EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return -2;
}
if (ctx->operation != EVP_PKEY_OP_PARAMGEN) {
EVPerror(EVP_R_OPERATON_NOT_INITIALIZED);
return -1;
}
if (!ppkey)
return -1;
if (!*ppkey)
*ppkey = EVP_PKEY_new();
ret = ctx->pmeth->paramgen(ctx, *ppkey);
if (ret <= 0) {
EVP_PKEY_free(*ppkey);
*ppkey = NULL;
}
return ret;
}
int
EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx)
{
int ret;
if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return -2;
}
ctx->operation = EVP_PKEY_OP_KEYGEN;
if (!ctx->pmeth->keygen_init)
return 1;
ret = ctx->pmeth->keygen_init(ctx);
if (ret <= 0)
ctx->operation = EVP_PKEY_OP_UNDEFINED;
return ret;
}
int
EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
{
int ret;
if (!ctx || !ctx->pmeth || !ctx->pmeth->keygen) {
EVPerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
return -2;
}
if (ctx->operation != EVP_PKEY_OP_KEYGEN) {
EVPerror(EVP_R_OPERATON_NOT_INITIALIZED);
return -1;
}
if (!ppkey)
return -1;
if (!*ppkey)
*ppkey = EVP_PKEY_new();
ret = ctx->pmeth->keygen(ctx, *ppkey);
if (ret <= 0) {
EVP_PKEY_free(*ppkey);
*ppkey = NULL;
}
return ret;
}
void
EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX *ctx, EVP_PKEY_gen_cb *cb)
{
ctx->pkey_gencb = cb;
}
EVP_PKEY_gen_cb *
EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX *ctx)
{
return ctx->pkey_gencb;
}
/* "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB
* style callbacks.
*/
static int
trans_cb(int a, int b, BN_GENCB *gcb)
{
EVP_PKEY_CTX *ctx = gcb->arg;
ctx->keygen_info[0] = a;
ctx->keygen_info[1] = b;
return ctx->pkey_gencb(ctx);
}
void
evp_pkey_set_cb_translate(BN_GENCB *cb, EVP_PKEY_CTX *ctx)
{
BN_GENCB_set(cb, trans_cb, ctx);
}
int
EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx)
{
if (idx == -1)
return ctx->keygen_info_count;
if (idx < 0 || idx > ctx->keygen_info_count)
return 0;
return ctx->keygen_info[idx];
}
EVP_PKEY *
EVP_PKEY_new_mac_key(int type, ENGINE *e, const unsigned char *key, int keylen)
{
EVP_PKEY_CTX *mac_ctx = NULL;
EVP_PKEY *mac_key = NULL;
mac_ctx = EVP_PKEY_CTX_new_id(type, e);
if (!mac_ctx)
return NULL;
if (EVP_PKEY_keygen_init(mac_ctx) <= 0)
goto merr;
if (EVP_PKEY_CTX_ctrl(mac_ctx, -1, EVP_PKEY_OP_KEYGEN,
EVP_PKEY_CTRL_SET_MAC_KEY, keylen, (void *)key) <= 0)
goto merr;
if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0)
goto merr;
merr:
EVP_PKEY_CTX_free(mac_ctx);
return mac_key;
}
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