[thirdparty/openssl.git] / crypto / evp / pmeth_gn.c

/*
 * Copyright 2006-2022 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <stdio.h>
#include <stdlib.h>
#include <openssl/core.h>
#include <openssl/core_names.h>
#include "internal/cryptlib.h"
#include "internal/core.h"
#include <openssl/objects.h>
#include <openssl/evp.h>
#include "crypto/bn.h"
#ifndef FIPS_MODULE
# include "crypto/asn1.h"
#endif
#include "crypto/evp.h"
#include "evp_local.h"

static int gen_init(EVP_PKEY_CTX *ctx, int operation)
{
    int ret = 0;

    if (ctx == NULL)
        goto not_supported;

    evp_pkey_ctx_free_old_ops(ctx);
    ctx->operation = operation;

    if (ctx->keymgmt == NULL || ctx->keymgmt->gen_init == NULL)
        goto legacy;

    switch (operation) {
    case EVP_PKEY_OP_PARAMGEN:
        ctx->op.keymgmt.genctx =
            evp_keymgmt_gen_init(ctx->keymgmt,
                                 OSSL_KEYMGMT_SELECT_ALL_PARAMETERS, NULL);
        break;
    case EVP_PKEY_OP_KEYGEN:
        ctx->op.keymgmt.genctx =
            evp_keymgmt_gen_init(ctx->keymgmt, OSSL_KEYMGMT_SELECT_KEYPAIR,
                                 NULL);
        break;
    }

    if (ctx->op.keymgmt.genctx == NULL)
        ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
    else
        ret = 1;
    goto end;

 legacy:
#ifdef FIPS_MODULE
    goto not_supported;
#else
    if (ctx->pmeth == NULL
        || (operation == EVP_PKEY_OP_PARAMGEN
            && ctx->pmeth->paramgen == NULL)
        || (operation == EVP_PKEY_OP_KEYGEN
            && ctx->pmeth->keygen == NULL))
        goto not_supported;

    ret = 1;
    switch (operation) {
    case EVP_PKEY_OP_PARAMGEN:
        if (ctx->pmeth->paramgen_init != NULL)
            ret = ctx->pmeth->paramgen_init(ctx);
        break;
    case EVP_PKEY_OP_KEYGEN:
        if (ctx->pmeth->keygen_init != NULL)
            ret = ctx->pmeth->keygen_init(ctx);
        break;
    }
#endif

 end:
    if (ret <= 0 && ctx != NULL) {
        evp_pkey_ctx_free_old_ops(ctx);
        ctx->operation = EVP_PKEY_OP_UNDEFINED;
    }
    return ret;

 not_supported:
    ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
    ret = -2;
    goto end;
}

int EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx)
{
    return gen_init(ctx, EVP_PKEY_OP_PARAMGEN);
}

int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx)
{
    return gen_init(ctx, EVP_PKEY_OP_KEYGEN);
}

static int ossl_callback_to_pkey_gencb(const OSSL_PARAM params[], void *arg)
{
    EVP_PKEY_CTX *ctx = arg;
    const OSSL_PARAM *param = NULL;
    int p = -1, n = -1;

    if (ctx->pkey_gencb == NULL)
        return 1;                /* No callback?  That's fine */

    if ((param = OSSL_PARAM_locate_const(params, OSSL_GEN_PARAM_POTENTIAL))
        == NULL
        || !OSSL_PARAM_get_int(param, &p))
        return 0;
    if ((param = OSSL_PARAM_locate_const(params, OSSL_GEN_PARAM_ITERATION))
        == NULL
        || !OSSL_PARAM_get_int(param, &n))
        return 0;

    ctx->keygen_info[0] = p;
    ctx->keygen_info[1] = n;

    return ctx->pkey_gencb(ctx);
}

int EVP_PKEY_generate(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
{
    int ret = 0;
    EVP_PKEY *allocated_pkey = NULL;
    /* Legacy compatible keygen callback info, only used with provider impls */
    int gentmp[2];

    if (ppkey == NULL)
        return -1;

    if (ctx == NULL)
        goto not_supported;

    if ((ctx->operation & EVP_PKEY_OP_TYPE_GEN) == 0)
        goto not_initialized;

    if (*ppkey == NULL)
        *ppkey = allocated_pkey = EVP_PKEY_new();

    if (*ppkey == NULL) {
        ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
        return -1;
    }

    if (ctx->op.keymgmt.genctx == NULL)
        goto legacy;

    /*
     * Asssigning gentmp to ctx->keygen_info is something our legacy
     * implementations do.  Because the provider implementations aren't
     * allowed to reach into our EVP_PKEY_CTX, we need to provide similar
     * space for backward compatibility.  It's ok that we attach a local
     * variable, as it should only be useful in the calls down from here.
     * This is cleared as soon as it isn't useful any more, i.e. directly
     * after the evp_keymgmt_util_gen() call.
     */
    ctx->keygen_info = gentmp;
    ctx->keygen_info_count = 2;

    ret = 1;
    if (ctx->pkey != NULL) {
        EVP_KEYMGMT *tmp_keymgmt = ctx->keymgmt;
        void *keydata =
            evp_pkey_export_to_provider(ctx->pkey, ctx->libctx,
                                        &tmp_keymgmt, ctx->propquery);

        if (tmp_keymgmt == NULL)
            goto not_supported;
        /*
         * It's ok if keydata is NULL here.  The backend is expected to deal
         * with that as it sees fit.
         */
        ret = evp_keymgmt_gen_set_template(ctx->keymgmt,
                                           ctx->op.keymgmt.genctx, keydata);
    }

    /*
     * the returned value from evp_keymgmt_util_gen() is cached in *ppkey,
     * so we do not need to save it, just check it.
     */
    ret = ret
        && (evp_keymgmt_util_gen(*ppkey, ctx->keymgmt, ctx->op.keymgmt.genctx,
                                 ossl_callback_to_pkey_gencb, ctx)
            != NULL);

    ctx->keygen_info = NULL;

#ifndef FIPS_MODULE
    /* In case |*ppkey| was originally a legacy key */
    if (ret)
        evp_pkey_free_legacy(*ppkey);
#endif

    /*
     * Because we still have legacy keys
     */
    (*ppkey)->type = ctx->legacy_keytype;

    goto end;

 legacy:
#ifdef FIPS_MODULE
    goto not_supported;
#else
    /*
     * If we get here then we're using legacy paramgen/keygen. In that case
     * the pkey in ctx (if there is one) had better not be provided (because the
     * legacy methods may not know how to handle it). However we can only get
     * here if ctx->op.keymgmt.genctx == NULL, but that should never be the case
     * if ctx->pkey is provided because we don't allow this when we initialise
     * the ctx.
     */
    if (ctx->pkey != NULL && !ossl_assert(!evp_pkey_is_provided(ctx->pkey)))
        goto not_accessible;

    switch (ctx->operation) {
    case EVP_PKEY_OP_PARAMGEN:
        ret = ctx->pmeth->paramgen(ctx, *ppkey);
        break;
    case EVP_PKEY_OP_KEYGEN:
        ret = ctx->pmeth->keygen(ctx, *ppkey);
        break;
    default:
        goto not_supported;
    }
#endif

 end:
    if (ret <= 0) {
        if (allocated_pkey != NULL)
            *ppkey = NULL;
        EVP_PKEY_free(allocated_pkey);
    }
    return ret;

 not_supported:
    ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
    ret = -2;
    goto end;
 not_initialized:
    ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
    ret = -1;
    goto end;
#ifndef FIPS_MODULE
 not_accessible:
    ERR_raise(ERR_LIB_EVP, EVP_R_INACCESSIBLE_DOMAIN_PARAMETERS);
    ret = -1;
    goto end;
#endif
}

int EVP_PKEY_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
{
    if (ctx->operation != EVP_PKEY_OP_PARAMGEN) {
        ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
        return -1;
    }
    return EVP_PKEY_generate(ctx, ppkey);
}

int EVP_PKEY_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey)
{
    if (ctx->operation != EVP_PKEY_OP_KEYGEN) {
        ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
        return -1;
    }
    return EVP_PKEY_generate(ctx, ppkey);
}

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 = BN_GENCB_get_arg(gcb);
    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];
}

#ifndef FIPS_MODULE

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_set_mac_key(mac_ctx, key, keylen) <= 0)
        goto merr;
    if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0)
        goto merr;
 merr:
    EVP_PKEY_CTX_free(mac_ctx);
    return mac_key;
}

#endif /* FIPS_MODULE */

/*- All methods below can also be used in FIPS_MODULE */

static int fromdata_init(EVP_PKEY_CTX *ctx, int operation)
{
    if (ctx == NULL || ctx->keytype == NULL)
        goto not_supported;

    evp_pkey_ctx_free_old_ops(ctx);
    if (ctx->keymgmt == NULL)
        goto not_supported;

    ctx->operation = operation;
    return 1;

 not_supported:
    if (ctx != NULL)
        ctx->operation = EVP_PKEY_OP_UNDEFINED;
    ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
    return -2;
}

int EVP_PKEY_fromdata_init(EVP_PKEY_CTX *ctx)
{
    return fromdata_init(ctx, EVP_PKEY_OP_FROMDATA);
}

int EVP_PKEY_fromdata(EVP_PKEY_CTX *ctx, EVP_PKEY **ppkey, int selection,
                      OSSL_PARAM params[])
{
    void *keydata = NULL;
    EVP_PKEY *allocated_pkey = NULL;

    if (ctx == NULL || (ctx->operation & EVP_PKEY_OP_FROMDATA) == 0) {
        ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
        return -2;
    }

    if (ppkey == NULL)
        return -1;

    if (*ppkey == NULL)
        allocated_pkey = *ppkey = EVP_PKEY_new();

    if (*ppkey == NULL) {
        ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
        return -1;
    }

    keydata = evp_keymgmt_util_fromdata(*ppkey, ctx->keymgmt, selection, params);
    if (keydata == NULL) {
        if (allocated_pkey != NULL) {
            *ppkey = NULL;
            EVP_PKEY_free(allocated_pkey);
        }
        return 0;
    }
    /* keydata is cached in *ppkey, so we need not bother with it further */
    return 1;
}

const OSSL_PARAM *EVP_PKEY_fromdata_settable(EVP_PKEY_CTX *ctx, int selection)
{
    /* We call fromdata_init to get ctx->keymgmt populated */
    if (fromdata_init(ctx, EVP_PKEY_OP_UNDEFINED) == 1)
        return evp_keymgmt_import_types(ctx->keymgmt, selection);
    return NULL;
}

static OSSL_CALLBACK ossl_pkey_todata_cb;

static int ossl_pkey_todata_cb(const OSSL_PARAM params[], void *arg)
{
    OSSL_PARAM **ret = arg;

    *ret = OSSL_PARAM_dup(params);
    return 1;
}

int EVP_PKEY_todata(const EVP_PKEY *pkey, int selection, OSSL_PARAM **params)
{
    if (params == NULL)
        return 0;
    return EVP_PKEY_export(pkey, selection, ossl_pkey_todata_cb, params);
}

#ifndef FIPS_MODULE
struct fake_import_data_st {
    OSSL_CALLBACK *export_cb;
    void *export_cbarg;
};

static OSSL_FUNC_keymgmt_import_fn pkey_fake_import;
static int pkey_fake_import(void *fake_keydata, int ignored_selection,
                            const OSSL_PARAM params[])
{
    struct fake_import_data_st *data = fake_keydata;

    return data->export_cb(params, data->export_cbarg);
}
#endif

int EVP_PKEY_export(const EVP_PKEY *pkey, int selection,
                    OSSL_CALLBACK *export_cb, void *export_cbarg)
{
    if (pkey == NULL) {
        ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
        return 0;
    }
#ifndef FIPS_MODULE
    if (evp_pkey_is_legacy(pkey)) {
        struct fake_import_data_st data;

        data.export_cb = export_cb;
        data.export_cbarg = export_cbarg;

        /*
         * We don't need to care about libctx or propq here, as we're only
         * interested in the resulting OSSL_PARAM array.
         */
        return pkey->ameth->export_to(pkey, &data, pkey_fake_import,
                                      NULL, NULL);
    }
#endif
    return evp_keymgmt_util_export(pkey, selection, export_cb, export_cbarg);
}
Commit	Line	Data
0f113f3e	1	/*
fecb3aae	2	* Copyright 2006-2022 The OpenSSL Project Authors. All Rights Reserved.
f5cda4cb	3	*
4a8b0c55	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
62867571 RS	5	* this file except in compliance with the License. You can obtain a copy
	6	* in the file LICENSE in the source distribution or at
	7	* https://www.openssl.org/source/license.html
f5cda4cb DSH	8	*/
	9
	10	#include <stdio.h>
	11	#include <stdlib.h>
62924755 RL	12	#include <openssl/core.h>
62924755 RL	13	#include <openssl/core_names.h>
b39fc560	14	#include "internal/cryptlib.h"
62924755	15	#include "internal/core.h"
c20276e4	16	#include <openssl/objects.h>
f5cda4cb	17	#include <openssl/evp.h>
25f2138b	18	#include "crypto/bn.h"
3f773c91 TM	19	#ifndef FIPS_MODULE
	20	# include "crypto/asn1.h"
	21	#endif
25f2138b	22	#include "crypto/evp.h"
46e2dd05 RL	23	#include "evp_local.h"
46e2dd05 RL	24
62924755	25	static int gen_init(EVP_PKEY_CTX *ctx, int operation)
0f113f3e	26	{
62924755 RL	27	int ret = 0;
	28
	29	if (ctx == NULL)
	30	goto not_supported;
	31
	32	evp_pkey_ctx_free_old_ops(ctx);
	33	ctx->operation = operation;
	34
4b9e90f4	35	if (ctx->keymgmt == NULL \|\| ctx->keymgmt->gen_init == NULL)
62924755 RL	36	goto legacy;
62924755 RL	37
62924755 RL	38	switch (operation) {
	39	case EVP_PKEY_OP_PARAMGEN:
	40	ctx->op.keymgmt.genctx =
	41	evp_keymgmt_gen_init(ctx->keymgmt,
1be63b3e	42	OSSL_KEYMGMT_SELECT_ALL_PARAMETERS, NULL);
62924755 RL	43	break;
	44	case EVP_PKEY_OP_KEYGEN:
	45	ctx->op.keymgmt.genctx =
1be63b3e P	46	evp_keymgmt_gen_init(ctx->keymgmt, OSSL_KEYMGMT_SELECT_KEYPAIR,
1be63b3e P	47	NULL);
62924755 RL	48	break;
	49	}
	50
	51	if (ctx->op.keymgmt.genctx == NULL)
	52	ERR_raise(ERR_LIB_EVP, EVP_R_INITIALIZATION_ERROR);
	53	else
	54	ret = 1;
	55	goto end;
	56
	57	legacy:
f844f9eb	58	#ifdef FIPS_MODULE
62924755 RL	59	goto not_supported;
	60	#else
	61	if (ctx->pmeth == NULL
	62	\|\| (operation == EVP_PKEY_OP_PARAMGEN
	63	&& ctx->pmeth->paramgen == NULL)
	64	\|\| (operation == EVP_PKEY_OP_KEYGEN
	65	&& ctx->pmeth->keygen == NULL))
	66	goto not_supported;
	67
	68	ret = 1;
	69	switch (operation) {
	70	case EVP_PKEY_OP_PARAMGEN:
	71	if (ctx->pmeth->paramgen_init != NULL)
	72	ret = ctx->pmeth->paramgen_init(ctx);
	73	break;
	74	case EVP_PKEY_OP_KEYGEN:
	75	if (ctx->pmeth->keygen_init != NULL)
	76	ret = ctx->pmeth->keygen_init(ctx);
	77	break;
0f113f3e	78	}
62924755 RL	79	#endif
	80
	81	end:
c7fa9297 RL	82	if (ret <= 0 && ctx != NULL) {
c7fa9297 RL	83	evp_pkey_ctx_free_old_ops(ctx);
0f113f3e	84	ctx->operation = EVP_PKEY_OP_UNDEFINED;
c7fa9297	85	}
0f113f3e	86	return ret;
62924755 RL	87
	88	not_supported:
	89	ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	90	ret = -2;
	91	goto end;
0f113f3e	92	}
f5cda4cb	93
62924755	94	int EVP_PKEY_paramgen_init(EVP_PKEY_CTX *ctx)
0f113f3e	95	{
62924755 RL	96	return gen_init(ctx, EVP_PKEY_OP_PARAMGEN);
62924755 RL	97	}
0f113f3e	98
62924755 RL	99	int EVP_PKEY_keygen_init(EVP_PKEY_CTX *ctx)
	100	{
	101	return gen_init(ctx, EVP_PKEY_OP_KEYGEN);
	102	}
	103
	104	static int ossl_callback_to_pkey_gencb(const OSSL_PARAM params[], void *arg)
	105	{
	106	EVP_PKEY_CTX *ctx = arg;
	107	const OSSL_PARAM *param = NULL;
	108	int p = -1, n = -1;
	109
	110	if (ctx->pkey_gencb == NULL)
	111	return 1; /* No callback? That's fine */
	112
	113	if ((param = OSSL_PARAM_locate_const(params, OSSL_GEN_PARAM_POTENTIAL))
	114	== NULL
	115	\|\| !OSSL_PARAM_get_int(param, &p))
	116	return 0;
	117	if ((param = OSSL_PARAM_locate_const(params, OSSL_GEN_PARAM_ITERATION))
	118	== NULL
	119	\|\| !OSSL_PARAM_get_int(param, &n))
	120	return 0;
	121
	122	ctx->keygen_info[0] = p;
	123	ctx->keygen_info[1] = n;
	124
	125	return ctx->pkey_gencb(ctx);
	126	}
	127
f9253152	128	int EVP_PKEY_generate(EVP_PKEY_CTX ctx, EVP_PKEY *ppkey)
62924755 RL	129	{
62924755 RL	130	int ret = 0;
62924755	131	EVP_PKEY *allocated_pkey = NULL;
4ec1463d RL	132	/* Legacy compatible keygen callback info, only used with provider impls */
4ec1463d RL	133	int gentmp[2];
0f113f3e	134
e34c66c6	135	if (ppkey == NULL)
0f113f3e MC	136	return -1;
0f113f3e MC	137
62924755 RL	138	if (ctx == NULL)
	139	goto not_supported;
	140
	141	if ((ctx->operation & EVP_PKEY_OP_TYPE_GEN) == 0)
	142	goto not_initialized;
	143
e34c66c6	144	if (*ppkey == NULL)
62924755	145	*ppkey = allocated_pkey = EVP_PKEY_new();
0f113f3e	146
e34c66c6	147	if (*ppkey == NULL) {
62924755	148	ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
e34c66c6 EK	149	return -1;
	150	}
	151
813d3171	152	if (ctx->op.keymgmt.genctx == NULL)
62924755 RL	153	goto legacy;
62924755 RL	154
4ec1463d RL	155	/*
	156	* Asssigning gentmp to ctx->keygen_info is something our legacy
	157	* implementations do. Because the provider implementations aren't
	158	* allowed to reach into our EVP_PKEY_CTX, we need to provide similar
	159	* space for backward compatibility. It's ok that we attach a local
	160	* variable, as it should only be useful in the calls down from here.
	161	* This is cleared as soon as it isn't useful any more, i.e. directly
	162	* after the evp_keymgmt_util_gen() call.
	163	*/
	164	ctx->keygen_info = gentmp;
	165	ctx->keygen_info_count = 2;
	166
62924755 RL	167	ret = 1;
	168	if (ctx->pkey != NULL) {
	169	EVP_KEYMGMT *tmp_keymgmt = ctx->keymgmt;
	170	void *keydata =
	171	evp_pkey_export_to_provider(ctx->pkey, ctx->libctx,
	172	&tmp_keymgmt, ctx->propquery);
	173
d0ddf9b4	174	if (tmp_keymgmt == NULL)
62924755	175	goto not_supported;
d0ddf9b4 RL	176	/*
	177	* It's ok if keydata is NULL here. The backend is expected to deal
	178	* with that as it sees fit.
	179	*/
62924755 RL	180	ret = evp_keymgmt_gen_set_template(ctx->keymgmt,
	181	ctx->op.keymgmt.genctx, keydata);
	182	}
	183
	184	/*
	185	* the returned value from evp_keymgmt_util_gen() is cached in *ppkey,
d1ca3911	186	* so we do not need to save it, just check it.
62924755 RL	187	*/
	188	ret = ret
	189	&& (evp_keymgmt_util_gen(*ppkey, ctx->keymgmt, ctx->op.keymgmt.genctx,
	190	ossl_callback_to_pkey_gencb, ctx)
	191	!= NULL);
	192
4ec1463d RL	193	ctx->keygen_info = NULL;
4ec1463d RL	194
f844f9eb	195	#ifndef FIPS_MODULE
62924755 RL	196	/* In case \|ppkey\| was originally a legacy key /
	197	if (ret)
	198	evp_pkey_free_legacy(*ppkey);
	199	#endif
	200
50914496	201	/*
b574c6a9	202	* Because we still have legacy keys
50914496 RL	203	*/
	204	(*ppkey)->type = ctx->legacy_keytype;
	205
62924755 RL	206	goto end;
	207
	208	legacy:
f844f9eb	209	#ifdef FIPS_MODULE
62924755 RL	210	goto not_supported;
62924755 RL	211	#else
b574c6a9 MC	212	/*
	213	* If we get here then we're using legacy paramgen/keygen. In that case
	214	* the pkey in ctx (if there is one) had better not be provided (because the
	215	* legacy methods may not know how to handle it). However we can only get
	216	* here if ctx->op.keymgmt.genctx == NULL, but that should never be the case
	217	* if ctx->pkey is provided because we don't allow this when we initialise
	218	* the ctx.
	219	*/
	220	if (ctx->pkey != NULL && !ossl_assert(!evp_pkey_is_provided(ctx->pkey)))
acb90ba8	221	goto not_accessible;
b574c6a9	222
62924755 RL	223	switch (ctx->operation) {
	224	case EVP_PKEY_OP_PARAMGEN:
	225	ret = ctx->pmeth->paramgen(ctx, *ppkey);
	226	break;
	227	case EVP_PKEY_OP_KEYGEN:
	228	ret = ctx->pmeth->keygen(ctx, *ppkey);
	229	break;
	230	default:
	231	goto not_supported;
	232	}
	233	#endif
	234
	235	end:
0f113f3e	236	if (ret <= 0) {
62924755 RL	237	if (allocated_pkey != NULL)
	238	*ppkey = NULL;
	239	EVP_PKEY_free(allocated_pkey);
0f113f3e MC	240	}
0f113f3e MC	241	return ret;
62924755 RL	242
	243	not_supported:
	244	ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	245	ret = -2;
	246	goto end;
	247	not_initialized:
bf23b9a1	248	ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
62924755 RL	249	ret = -1;
62924755 RL	250	goto end;
f844f9eb	251	#ifndef FIPS_MODULE
acb90ba8 RL	252	not_accessible:
	253	ERR_raise(ERR_LIB_EVP, EVP_R_INACCESSIBLE_DOMAIN_PARAMETERS);
	254	ret = -1;
	255	goto end;
	256	#endif
0f113f3e	257	}
f5cda4cb	258
62924755	259	int EVP_PKEY_paramgen(EVP_PKEY_CTX ctx, EVP_PKEY *ppkey)
0f113f3e	260	{
62924755	261	if (ctx->operation != EVP_PKEY_OP_PARAMGEN) {
bf23b9a1	262	ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
62924755	263	return -1;
0f113f3e	264	}
f9253152	265	return EVP_PKEY_generate(ctx, ppkey);
0f113f3e	266	}
f5cda4cb DSH	267
f5cda4cb DSH	268	int EVP_PKEY_keygen(EVP_PKEY_CTX ctx, EVP_PKEY *ppkey)
0f113f3e	269	{
0f113f3e	270	if (ctx->operation != EVP_PKEY_OP_KEYGEN) {
bf23b9a1	271	ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_INITIALIZED);
0f113f3e MC	272	return -1;
0f113f3e MC	273	}
f9253152	274	return EVP_PKEY_generate(ctx, ppkey);
0f113f3e	275	}
f5cda4cb DSH	276
f5cda4cb DSH	277	void EVP_PKEY_CTX_set_cb(EVP_PKEY_CTX ctx, EVP_PKEY_gen_cb cb)
0f113f3e MC	278	{
	279	ctx->pkey_gencb = cb;
	280	}
f5cda4cb	281
b28dea4e	282	EVP_PKEY_gen_cb EVP_PKEY_CTX_get_cb(EVP_PKEY_CTX ctx)
0f113f3e MC	283	{
	284	return ctx->pkey_gencb;
	285	}
b28dea4e	286
0f113f3e MC	287	/*
	288	* "translation callback" to call EVP_PKEY_CTX callbacks using BN_GENCB style
	289	* callbacks.
f5cda4cb DSH	290	*/
	291
	292	static int trans_cb(int a, int b, BN_GENCB *gcb)
0f113f3e MC	293	{
	294	EVP_PKEY_CTX *ctx = BN_GENCB_get_arg(gcb);
	295	ctx->keygen_info[0] = a;
	296	ctx->keygen_info[1] = b;
	297	return ctx->pkey_gencb(ctx);
	298	}
f5cda4cb DSH	299
f5cda4cb DSH	300	void evp_pkey_set_cb_translate(BN_GENCB cb, EVP_PKEY_CTX ctx)
0f113f3e MC	301	{
	302	BN_GENCB_set(cb, trans_cb, ctx);
	303	}
f5cda4cb DSH	304
f5cda4cb DSH	305	int EVP_PKEY_CTX_get_keygen_info(EVP_PKEY_CTX *ctx, int idx)
0f113f3e MC	306	{
	307	if (idx == -1)
	308	return ctx->keygen_info_count;
	309	if (idx < 0 \|\| idx > ctx->keygen_info_count)
	310	return 0;
	311	return ctx->keygen_info[idx];
	312	}
2022cfe0	313
f844f9eb	314	#ifndef FIPS_MODULE
62924755	315
2022cfe0	316	EVP_PKEY EVP_PKEY_new_mac_key(int type, ENGINE e,
0f113f3e MC	317	const unsigned char *key, int keylen)
	318	{
	319	EVP_PKEY_CTX *mac_ctx = NULL;
	320	EVP_PKEY *mac_key = NULL;
	321	mac_ctx = EVP_PKEY_CTX_new_id(type, e);
	322	if (!mac_ctx)
	323	return NULL;
	324	if (EVP_PKEY_keygen_init(mac_ctx) <= 0)
	325	goto merr;
eff1a4d2	326	if (EVP_PKEY_CTX_set_mac_key(mac_ctx, key, keylen) <= 0)
0f113f3e MC	327	goto merr;
	328	if (EVP_PKEY_keygen(mac_ctx, &mac_key) <= 0)
	329	goto merr;
	330	merr:
c5ba2d99	331	EVP_PKEY_CTX_free(mac_ctx);
0f113f3e MC	332	return mac_key;
0f113f3e MC	333	}
2aee35d3	334
f844f9eb	335	#endif /* FIPS_MODULE */
e683582b	336
f844f9eb	337	/- All methods below can also be used in FIPS_MODULE /
e683582b SL	338
	339	static int fromdata_init(EVP_PKEY_CTX *ctx, int operation)
	340	{
	341	if (ctx == NULL \|\| ctx->keytype == NULL)
	342	goto not_supported;
	343
	344	evp_pkey_ctx_free_old_ops(ctx);
e683582b SL	345	if (ctx->keymgmt == NULL)
	346	goto not_supported;
	347
4b9e90f4	348	ctx->operation = operation;
e683582b SL	349	return 1;
	350
	351	not_supported:
10ead938 SL	352	if (ctx != NULL)
10ead938 SL	353	ctx->operation = EVP_PKEY_OP_UNDEFINED;
e683582b SL	354	ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	355	return -2;
	356	}
	357
2db985b7	358	int EVP_PKEY_fromdata_init(EVP_PKEY_CTX *ctx)
e683582b	359	{
2db985b7	360	return fromdata_init(ctx, EVP_PKEY_OP_FROMDATA);
e683582b SL	361	}
e683582b SL	362
2db985b7 SL	363	int EVP_PKEY_fromdata(EVP_PKEY_CTX ctx, EVP_PKEY *ppkey, int selection,
2db985b7 SL	364	OSSL_PARAM params[])
e683582b	365	{
b305452f	366	void *keydata = NULL;
5b03b89f	367	EVP_PKEY *allocated_pkey = NULL;
e683582b	368
2db985b7	369	if (ctx == NULL \|\| (ctx->operation & EVP_PKEY_OP_FROMDATA) == 0) {
e683582b SL	370	ERR_raise(ERR_LIB_EVP, EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
	371	return -2;
	372	}
	373
	374	if (ppkey == NULL)
	375	return -1;
	376
	377	if (*ppkey == NULL)
5b03b89f	378	allocated_pkey = *ppkey = EVP_PKEY_new();
e683582b SL	379
	380	if (*ppkey == NULL) {
	381	ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
	382	return -1;
	383	}
	384
2db985b7	385	keydata = evp_keymgmt_util_fromdata(*ppkey, ctx->keymgmt, selection, params);
5b03b89f TM	386	if (keydata == NULL) {
	387	if (allocated_pkey != NULL) {
	388	*ppkey = NULL;
	389	EVP_PKEY_free(allocated_pkey);
	390	}
e683582b	391	return 0;
5b03b89f	392	}
b305452f	393	/* keydata is cached in ppkey, so we need not bother with it further /
e683582b SL	394	return 1;
	395	}
	396
2db985b7	397	const OSSL_PARAM EVP_PKEY_fromdata_settable(EVP_PKEY_CTX ctx, int selection)
e683582b SL	398	{
e683582b SL	399	/* We call fromdata_init to get ctx->keymgmt populated */
2db985b7 SL	400	if (fromdata_init(ctx, EVP_PKEY_OP_UNDEFINED) == 1)
2db985b7 SL	401	return evp_keymgmt_import_types(ctx->keymgmt, selection);
e683582b SL	402	return NULL;
e683582b SL	403	}
a732a4c3 SL	404
	405	static OSSL_CALLBACK ossl_pkey_todata_cb;
	406
	407	static int ossl_pkey_todata_cb(const OSSL_PARAM params[], void *arg)
	408	{
	409	OSSL_PARAM **ret = arg;
	410
	411	*ret = OSSL_PARAM_dup(params);
	412	return 1;
	413	}
	414
	415	int EVP_PKEY_todata(const EVP_PKEY pkey, int selection, OSSL_PARAM *params)
	416	{
	417	if (params == NULL)
	418	return 0;
	419	return EVP_PKEY_export(pkey, selection, ossl_pkey_todata_cb, params);
	420	}
	421
f33c04b8 RL	422	#ifndef FIPS_MODULE
	423	struct fake_import_data_st {
	424	OSSL_CALLBACK *export_cb;
	425	void *export_cbarg;
	426	};
	427
	428	static OSSL_FUNC_keymgmt_import_fn pkey_fake_import;
	429	static int pkey_fake_import(void *fake_keydata, int ignored_selection,
	430	const OSSL_PARAM params[])
	431	{
	432	struct fake_import_data_st *data = fake_keydata;
	433
	434	return data->export_cb(params, data->export_cbarg);
	435	}
	436	#endif
	437
a732a4c3 SL	438	int EVP_PKEY_export(const EVP_PKEY *pkey, int selection,
	439	OSSL_CALLBACK export_cb, void export_cbarg)
	440	{
f33c04b8 RL	441	if (pkey == NULL) {
	442	ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
	443	return 0;
	444	}
	445	#ifndef FIPS_MODULE
	446	if (evp_pkey_is_legacy(pkey)) {
	447	struct fake_import_data_st data;
	448
	449	data.export_cb = export_cb;
	450	data.export_cbarg = export_cbarg;
	451
	452	/*
	453	* We don't need to care about libctx or propq here, as we're only
	454	* interested in the resulting OSSL_PARAM array.
	455	*/
	456	return pkey->ameth->export_to(pkey, &data, pkey_fake_import,
	457	NULL, NULL);
	458	}
	459	#endif
a732a4c3 SL	460	return evp_keymgmt_util_export(pkey, selection, export_cb, export_cbarg);
a732a4c3 SL	461	}