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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/gost/gostr341001_pmeth.c	Lines:	0	330	0.0 %
Date:	2017-11-07	Branches:	0	201	0.0 %


/* $OpenBSD: gostr341001_pmeth.c,v 1.14 2017/01/29 17:49:23 beck Exp $ */
/*
 * Copyright (c) 2014 Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
 * Copyright (c) 2005-2006 Cryptocom LTD
 *
 * 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
 *    openssl-core@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.
 * ====================================================================
 */

#include <string.h>

#include <openssl/opensslconf.h>

#ifndef OPENSSL_NO_GOST
#include <openssl/bn.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#include <openssl/gost.h>
#include <openssl/ec.h>
#include <openssl/ecdsa.h>
#include <openssl/x509.h>

#include "evp_locl.h"
#include "gost_locl.h"
#include "gost_asn1.h"

static ECDSA_SIG *
unpack_signature_cp(const unsigned char *sig, size_t siglen)
{
	ECDSA_SIG *s;

	s = ECDSA_SIG_new();
	if (s == NULL) {
		GOSTerror(ERR_R_MALLOC_FAILURE);
		return NULL;
	}
	BN_bin2bn(sig, siglen / 2, s->s);
	BN_bin2bn(sig + siglen / 2, siglen / 2, s->r);
	return s;
}

static int
pack_signature_cp(ECDSA_SIG *s, int order, unsigned char *sig, size_t *siglen)
{
	int r_len = BN_num_bytes(s->r);
	int s_len = BN_num_bytes(s->s);

	if (r_len > order || s_len > order)
		return 0;

	*siglen = 2 * order;

	memset(sig, 0, *siglen);
	BN_bn2bin(s->s, sig + order - s_len);
	BN_bn2bin(s->r, sig + 2 * order - r_len);
	ECDSA_SIG_free(s);
	return 1;
}

static ECDSA_SIG *
unpack_signature_le(const unsigned char *sig, size_t siglen)
{
	ECDSA_SIG *s;

	s = ECDSA_SIG_new();
	if (s == NULL) {
		GOSTerror(ERR_R_MALLOC_FAILURE);
		return NULL;
	}
	GOST_le2bn(sig, siglen / 2, s->r);
	GOST_le2bn(sig + siglen / 2, siglen / 2, s->s);
	return s;
}

static int
pack_signature_le(ECDSA_SIG *s, int order, unsigned char *sig, size_t *siglen)
{
	*siglen = 2 * order;
	memset(sig, 0, *siglen);
	GOST_bn2le(s->r, sig, order);
	GOST_bn2le(s->s, sig + order, order);
	ECDSA_SIG_free(s);
	return 1;
}

struct gost_pmeth_data {
	int sign_param_nid; /* Should be set whenever parameters are filled */
	int digest_nid;
	EVP_MD *md;
	unsigned char *shared_ukm;
	int peer_key_used;
	int sig_format;
};

static int
pkey_gost01_init(EVP_PKEY_CTX *ctx)
{
	struct gost_pmeth_data *data;
	EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);

	data = calloc(1, sizeof(struct gost_pmeth_data));
	if (data == NULL)
		return 0;

	if (pkey != NULL && pkey->pkey.gost != NULL) {
		data->sign_param_nid =
		    EC_GROUP_get_curve_name(GOST_KEY_get0_group(pkey->pkey.gost));
		data->digest_nid = GOST_KEY_get_digest(pkey->pkey.gost);
	}
	EVP_PKEY_CTX_set_data(ctx, data);
	return 1;
}

/* Copies contents of gost_pmeth_data structure */
static int
pkey_gost01_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
{
	struct gost_pmeth_data *dst_data, *src_data;

	if (pkey_gost01_init(dst) == 0)
		return 0;

	src_data = EVP_PKEY_CTX_get_data(src);
	dst_data = EVP_PKEY_CTX_get_data(dst);
	*dst_data = *src_data;
	if (src_data->shared_ukm != NULL)
		dst_data->shared_ukm = NULL;
	return 1;
}

/* Frees up gost_pmeth_data structure */
static void
pkey_gost01_cleanup(EVP_PKEY_CTX *ctx)
{
	struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);

	free(data->shared_ukm);
	free(data);
}

static int
pkey_gost01_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
{
	struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
	EC_GROUP *group = NULL;
	GOST_KEY *gost = NULL;
	int ret = 0;

	if (data->sign_param_nid == NID_undef ||
	    data->digest_nid == NID_undef) {
		GOSTerror(GOST_R_NO_PARAMETERS_SET);
		return 0;
	}

	group = EC_GROUP_new_by_curve_name(data->sign_param_nid);
	if (group == NULL)
		goto done;

	EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE);

	gost = GOST_KEY_new();
	if (gost == NULL)
		goto done;

	if (GOST_KEY_set_digest(gost, data->digest_nid) == 0)
		goto done;

	if (GOST_KEY_set_group(gost, group) != 0)
		ret = EVP_PKEY_assign_GOST(pkey, gost);

done:
	if (ret == 0)
		GOST_KEY_free(gost);
	EC_GROUP_free(group);
	return ret;
}

static int
pkey_gost01_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
{
	if (pkey_gost01_paramgen(ctx, pkey) == 0)
		return 0;
	return gost2001_keygen(pkey->pkey.gost) != 0;
}

static int
pkey_gost01_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
    const unsigned char *tbs, size_t tbs_len)
{
	ECDSA_SIG *unpacked_sig = NULL;
	EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
	struct gost_pmeth_data *pctx = EVP_PKEY_CTX_get_data(ctx);
	BIGNUM *md;
	size_t size;
	int ret;

	if (pkey == NULL || pkey->pkey.gost == NULL)
		return 0;
	size = GOST_KEY_get_size(pkey->pkey.gost);

	if (siglen == NULL)
		return 0;
	if (sig == NULL) {
		*siglen = 2 * size;
		return 1;
	} else if (*siglen < 2 * size) {
		GOSTerror(EC_R_BUFFER_TOO_SMALL);
		return 0;
	}
	if (tbs_len != 32 && tbs_len != 64) {
		GOSTerror(EVP_R_BAD_BLOCK_LENGTH);
		return 0;
	}
	md = GOST_le2bn(tbs, tbs_len, NULL);
	if (md == NULL)
		return 0;
	unpacked_sig = gost2001_do_sign(md, pkey->pkey.gost);
	BN_free(md);
	if (unpacked_sig == NULL) {
		return 0;
	}
	switch (pctx->sig_format) {
	case GOST_SIG_FORMAT_SR_BE:
		ret = pack_signature_cp(unpacked_sig, size, sig, siglen);
		break;
	case GOST_SIG_FORMAT_RS_LE:
		ret = pack_signature_le(unpacked_sig, size, sig, siglen);
		break;
	default:
		ret = -1;
		break;
	}
	if (ret <= 0)
		ECDSA_SIG_free(unpacked_sig);
	return ret;
}

static int
pkey_gost01_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen,
    const unsigned char *tbs, size_t tbs_len)
{
	int ok = 0;
	EVP_PKEY *pub_key = EVP_PKEY_CTX_get0_pkey(ctx);
	struct gost_pmeth_data *pctx = EVP_PKEY_CTX_get_data(ctx);
	ECDSA_SIG *s = NULL;
	BIGNUM *md;

	if (pub_key == NULL)
		return 0;
	switch (pctx->sig_format) {
	case GOST_SIG_FORMAT_SR_BE:
		s = unpack_signature_cp(sig, siglen);
		break;
	case GOST_SIG_FORMAT_RS_LE:
		s = unpack_signature_le(sig, siglen);
		break;
	}
	if (s == NULL)
		return 0;
	md = GOST_le2bn(tbs, tbs_len, NULL);
	if (md == NULL)
		goto err;
	ok = gost2001_do_verify(md, s, pub_key->pkey.gost);

err:
	BN_free(md);
	ECDSA_SIG_free(s);
	return ok;
}

static int
gost01_VKO_key(EVP_PKEY *pub_key, EVP_PKEY *priv_key, const unsigned char *ukm,
    unsigned char *key)
{
	unsigned char hashbuf[128];
	int digest_nid;
	int ret = 0;
	BN_CTX *ctx = BN_CTX_new();
	BIGNUM *UKM, *X, *Y;

	if (ctx == NULL)
		return 0;

	BN_CTX_start(ctx);
	if ((UKM = BN_CTX_get(ctx)) == NULL)
		goto err;
	if ((X = BN_CTX_get(ctx)) == NULL)
		goto err;
	if ((Y = BN_CTX_get(ctx)) == NULL)
		goto err;

	GOST_le2bn(ukm, 8, UKM);

	digest_nid = GOST_KEY_get_digest(priv_key->pkey.gost);
	if (VKO_compute_key(X, Y, pub_key->pkey.gost, priv_key->pkey.gost,
	    UKM) == 0)
		goto err;

	switch (digest_nid) {
	case NID_id_GostR3411_94_CryptoProParamSet:
		GOST_bn2le(X, hashbuf, 32);
		GOST_bn2le(Y, hashbuf + 32, 32);
		GOSTR341194(hashbuf, 64, key, digest_nid);
		ret = 1;
		break;
	case NID_id_tc26_gost3411_2012_256:
		GOST_bn2le(X, hashbuf, 32);
		GOST_bn2le(Y, hashbuf + 32, 32);
		STREEBOG256(hashbuf, 64, key);
		ret = 1;
		break;
	case NID_id_tc26_gost3411_2012_512:
		GOST_bn2le(X, hashbuf, 64);
		GOST_bn2le(Y, hashbuf + 64, 64);
		STREEBOG256(hashbuf, 128, key);
		ret = 1;
		break;
	default:
		ret = -2;
		break;
	}
err:
	BN_CTX_end(ctx);
	BN_CTX_free(ctx);
	return ret;
}

int
pkey_gost01_decrypt(EVP_PKEY_CTX *pctx, unsigned char *key, size_t *key_len,
    const unsigned char *in, size_t in_len)
{
	const unsigned char *p = in;
	EVP_PKEY *priv = EVP_PKEY_CTX_get0_pkey(pctx);
	GOST_KEY_TRANSPORT *gkt = NULL;
	int ret = 0;
	unsigned char wrappedKey[44];
	unsigned char sharedKey[32];
	EVP_PKEY *eph_key = NULL, *peerkey = NULL;
	int nid;

	if (key == NULL) {
		*key_len = 32;
		return 1;
	}
	gkt = d2i_GOST_KEY_TRANSPORT(NULL, (const unsigned char **)&p, in_len);
	if (gkt == NULL) {
		GOSTerror(GOST_R_ERROR_PARSING_KEY_TRANSPORT_INFO);
		return -1;
	}

	/* If key transport structure contains public key, use it */
	eph_key = X509_PUBKEY_get(gkt->key_agreement_info->ephem_key);
	if (eph_key != NULL) {
		if (EVP_PKEY_derive_set_peer(pctx, eph_key) <= 0) {
			GOSTerror(GOST_R_INCOMPATIBLE_PEER_KEY);
			goto err;
		}
	} else {
		/* Set control "public key from client certificate used" */
		if (EVP_PKEY_CTX_ctrl(pctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 3,
		    NULL) <= 0) {
			GOSTerror(GOST_R_CTRL_CALL_FAILED);
			goto err;
		}
	}
	peerkey = EVP_PKEY_CTX_get0_peerkey(pctx);
	if (peerkey == NULL) {
		GOSTerror(GOST_R_NO_PEER_KEY);
		goto err;
	}

	nid = OBJ_obj2nid(gkt->key_agreement_info->cipher);

	if (gkt->key_agreement_info->eph_iv->length != 8) {
		GOSTerror(GOST_R_INVALID_IV_LENGTH);
		goto err;
	}
	memcpy(wrappedKey, gkt->key_agreement_info->eph_iv->data, 8);
	if (gkt->key_info->encrypted_key->length != 32) {
		GOSTerror(EVP_R_BAD_KEY_LENGTH);
		goto err;
	}
	memcpy(wrappedKey + 8, gkt->key_info->encrypted_key->data, 32);
	if (gkt->key_info->imit->length != 4) {
		GOSTerror(ERR_R_INTERNAL_ERROR);
		goto err;
	}
	memcpy(wrappedKey + 40, gkt->key_info->imit->data, 4);
	if (gost01_VKO_key(peerkey, priv, wrappedKey, sharedKey) <= 0)
		goto err;
	if (gost_key_unwrap_crypto_pro(nid, sharedKey, wrappedKey, key) == 0) {
		GOSTerror(GOST_R_ERROR_COMPUTING_SHARED_KEY);
		goto err;
	}

	ret = 1;
err:
	EVP_PKEY_free(eph_key);
	GOST_KEY_TRANSPORT_free(gkt);
	return ret;
}

int
pkey_gost01_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen)
{
	/*
	 * Public key of peer in the ctx field peerkey
	 * Our private key in the ctx pkey
	 * ukm is in the algorithm specific context data
	 */
	EVP_PKEY *my_key = EVP_PKEY_CTX_get0_pkey(ctx);
	EVP_PKEY *peer_key = EVP_PKEY_CTX_get0_peerkey(ctx);
	struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);

	if (data->shared_ukm == NULL) {
		GOSTerror(GOST_R_UKM_NOT_SET);
		return 0;
	}

	if (key == NULL) {
		*keylen = 32;
		return 32;
	}

	if (gost01_VKO_key(peer_key, my_key, data->shared_ukm, key) <= 0)
		return 0;

	*keylen = 32;
	return 1;
}

int
pkey_gost01_encrypt(EVP_PKEY_CTX *pctx, unsigned char *out, size_t *out_len,
    const unsigned char *key, size_t key_len)
{
	GOST_KEY_TRANSPORT *gkt = NULL;
	EVP_PKEY *pubk = EVP_PKEY_CTX_get0_pkey(pctx);
	struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(pctx);
	unsigned char ukm[8], shared_key[32], crypted_key[44];
	int ret = 0;
	int key_is_ephemeral;
	EVP_PKEY *sec_key = EVP_PKEY_CTX_get0_peerkey(pctx);
	int nid = NID_id_Gost28147_89_CryptoPro_A_ParamSet;

	if (data->shared_ukm != NULL) {
		memcpy(ukm, data->shared_ukm, 8);
	} else /* if (out != NULL) */ {
		arc4random_buf(ukm, 8);
	}
	/* Check for private key in the peer_key of context */
	if (sec_key) {
		key_is_ephemeral = 0;
		if (GOST_KEY_get0_private_key(sec_key->pkey.gost) == 0) {
			GOSTerror(GOST_R_NO_PRIVATE_PART_OF_NON_EPHEMERAL_KEYPAIR);
			goto err;
		}
	} else {
		key_is_ephemeral = 1;
		if (out != NULL) {
			GOST_KEY *tmp_key;

			sec_key = EVP_PKEY_new();
			if (sec_key == NULL)
				goto err;
			tmp_key = GOST_KEY_new();
			if (tmp_key == NULL)
				goto err;
			if (EVP_PKEY_assign(sec_key, EVP_PKEY_base_id(pubk),
			    tmp_key) == 0) {
				GOST_KEY_free(tmp_key);
				goto err;
			}
			if (EVP_PKEY_copy_parameters(sec_key, pubk) == 0)
				goto err;
			if (gost2001_keygen(sec_key->pkey.gost) == 0) {
				goto err;
			}
		}
	}

	if (out != NULL) {
		if (gost01_VKO_key(pubk, sec_key, ukm, shared_key) <= 0)
			goto err;
		gost_key_wrap_crypto_pro(nid, shared_key, ukm, key,
		    crypted_key);
	}
	gkt = GOST_KEY_TRANSPORT_new();
	if (gkt == NULL)
		goto err;
	if (ASN1_OCTET_STRING_set(gkt->key_agreement_info->eph_iv, ukm, 8) == 0)
		goto err;
	if (ASN1_OCTET_STRING_set(gkt->key_info->imit, crypted_key + 40,
	    4) == 0)
		goto err;
	if (ASN1_OCTET_STRING_set(gkt->key_info->encrypted_key, crypted_key + 8,
	    32) == 0)
		goto err;
	if (key_is_ephemeral) {
		if (X509_PUBKEY_set(&gkt->key_agreement_info->ephem_key,
		    out != NULL ? sec_key : pubk) == 0) {
			GOSTerror(GOST_R_CANNOT_PACK_EPHEMERAL_KEY);
			goto err;
		}
	}
	ASN1_OBJECT_free(gkt->key_agreement_info->cipher);
	gkt->key_agreement_info->cipher = OBJ_nid2obj(nid);
	if (key_is_ephemeral)
		EVP_PKEY_free(sec_key);
	else {
		/* Set control "public key from client certificate used" */
		if (EVP_PKEY_CTX_ctrl(pctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 3,
		    NULL) <= 0) {
			GOSTerror(GOST_R_CTRL_CALL_FAILED);
			goto err;
		}
	}
	if ((*out_len = i2d_GOST_KEY_TRANSPORT(gkt, out ? &out : NULL)) > 0)
		ret = 1;
	GOST_KEY_TRANSPORT_free(gkt);
	return ret;

err:
	if (key_is_ephemeral)
		EVP_PKEY_free(sec_key);
	GOST_KEY_TRANSPORT_free(gkt);
	return -1;
}


static int
pkey_gost01_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
{
	struct gost_pmeth_data *pctx = EVP_PKEY_CTX_get_data(ctx);

	switch (type) {
	case EVP_PKEY_CTRL_MD:
		if (EVP_MD_type(p2) !=
		    GostR3410_get_md_digest(pctx->digest_nid)) {
			GOSTerror(GOST_R_INVALID_DIGEST_TYPE);
			return 0;
		}
		pctx->md = p2;
		return 1;
	case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
	case EVP_PKEY_CTRL_PKCS7_DECRYPT:
	case EVP_PKEY_CTRL_PKCS7_SIGN:
	case EVP_PKEY_CTRL_DIGESTINIT:
		return 1;

	case EVP_PKEY_CTRL_GOST_PARAMSET:
		pctx->sign_param_nid = (int)p1;
		return 1;

	case EVP_PKEY_CTRL_SET_IV:
	    {
		char *ukm = malloc(p1);

		if (ukm == NULL) {
			GOSTerror(ERR_R_MALLOC_FAILURE);
			return 0;
		}
		memcpy(ukm, p2, p1);
		free(pctx->shared_ukm);
		pctx->shared_ukm = ukm;
		return 1;
	    }

	case EVP_PKEY_CTRL_PEER_KEY:
		if (p1 == 0 || p1 == 1)	/* call from EVP_PKEY_derive_set_peer */
			return 1;
		if (p1 == 2)	/* TLS: peer key used? */
			return pctx->peer_key_used;
		if (p1 == 3)	/* TLS: peer key used! */
			return (pctx->peer_key_used = 1);
		return -2;
	case EVP_PKEY_CTRL_GOST_SIG_FORMAT:
		switch (p1) {
		case GOST_SIG_FORMAT_SR_BE:
		case GOST_SIG_FORMAT_RS_LE:
			pctx->sig_format = p1;
			return 1;
		default:
			return 0;
		}
		break;
	case EVP_PKEY_CTRL_GOST_SET_DIGEST:
		pctx->digest_nid = (int)p1;
		return 1;
	case EVP_PKEY_CTRL_GOST_GET_DIGEST:
		*(int *)p2 = pctx->digest_nid;
		return 1;
	default:
		return -2;
	}
}

static int
pkey_gost01_ctrl_str(EVP_PKEY_CTX *ctx, const char *type, const char *value)
{
	int param_nid = NID_undef;
	int digest_nid = NID_undef;

	if (strcmp(type, "paramset") == 0) {
		if (value == NULL)
			return 0;
		if (pkey_gost01_ctrl(ctx, EVP_PKEY_CTRL_GOST_GET_DIGEST, 0,
		    &digest_nid) == 0)
			return 0;
		if (digest_nid == NID_id_tc26_gost3411_2012_512)
			param_nid = GostR3410_512_param_id(value);
		else
			param_nid = GostR3410_256_param_id(value);
		if (param_nid == NID_undef)
			param_nid = OBJ_txt2nid(value);
		if (param_nid == NID_undef)
			return 0;

		return pkey_gost01_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
		    param_nid, NULL);
	}
	if (strcmp(type, "dgst") == 0) {
		if (value == NULL)
			return 0;
		else if (strcmp(value, "gost94") == 0 ||
		    strcmp(value, "md_gost94") == 0)
			digest_nid = NID_id_GostR3411_94_CryptoProParamSet;
		else if (strcmp(value, "streebog256") == 0)
			digest_nid = NID_id_tc26_gost3411_2012_256;
		else if (strcmp(value, "streebog512") == 0)
			digest_nid = NID_id_tc26_gost3411_2012_512;

		if (digest_nid == NID_undef)
			return 0;

		return pkey_gost01_ctrl(ctx, EVP_PKEY_CTRL_GOST_SET_DIGEST,
		    digest_nid, NULL);
	}
	return -2;
}

const EVP_PKEY_METHOD gostr01_pkey_meth = {
	.pkey_id = EVP_PKEY_GOSTR01,

	.init = pkey_gost01_init,
	.copy = pkey_gost01_copy,
	.cleanup = pkey_gost01_cleanup,

	.paramgen = pkey_gost01_paramgen,
	.keygen = pkey_gost01_keygen,
	.sign = pkey_gost01_sign,
	.verify = pkey_gost01_verify,

	.encrypt = pkey_gost01_encrypt,
	.decrypt = pkey_gost01_decrypt,
	.derive = pkey_gost01_derive,

	.ctrl = pkey_gost01_ctrl,
	.ctrl_str = pkey_gost01_ctrl_str,
};
#endif


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: gostr341001_pmeth.c,v 1.14 2017/01/29 17:49:23 beck Exp $ */
2			/*
3			* Copyright (c) 2014 Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
4			* Copyright (c) 2005-2006 Cryptocom LTD
5			*
6			* Redistribution and use in source and binary forms, with or without
7			* modification, are permitted provided that the following conditions
8			* are met:
9			*
10			* 1. Redistributions of source code must retain the above copyright
11			* notice, this list of conditions and the following disclaimer.
12			*
13			* 2. Redistributions in binary form must reproduce the above copyright
14			* notice, this list of conditions and the following disclaimer in
15			* the documentation and/or other materials provided with the
16			* distribution.
17			*
18			* 3. All advertising materials mentioning features or use of this
19			* software must display the following acknowledgment:
20			* "This product includes software developed by the OpenSSL Project
21			* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
22			*
23			* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
24			* endorse or promote products derived from this software without
25			* prior written permission. For written permission, please contact
26			* openssl-core@openssl.org.
27			*
28			* 5. Products derived from this software may not be called "OpenSSL"
29			* nor may "OpenSSL" appear in their names without prior written
30			* permission of the OpenSSL Project.
31			*
32			* 6. Redistributions of any form whatsoever must retain the following
33			* acknowledgment:
34			* "This product includes software developed by the OpenSSL Project
35			* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
36			*
37			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
38			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
39			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
40			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
41			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
43			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
44			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
45			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
46			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
47			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
48			* OF THE POSSIBILITY OF SUCH DAMAGE.
49			* ====================================================================
50			*/
51
52			#include <string.h>
53
54			#include <openssl/opensslconf.h>
55
56			#ifndef OPENSSL_NO_GOST
57			#include <openssl/bn.h>
58			#include <openssl/evp.h>
59			#include <openssl/err.h>
60			#include <openssl/gost.h>
61			#include <openssl/ec.h>
62			#include <openssl/ecdsa.h>
63			#include <openssl/x509.h>
64
65			#include "evp_locl.h"
66			#include "gost_locl.h"
67			#include "gost_asn1.h"
68
69			static ECDSA_SIG *
70			unpack_signature_cp(const unsigned char *sig, size_t siglen)
71			{
72			ECDSA_SIG *s;
73
74			s = ECDSA_SIG_new();
75			if (s == NULL) {
76			GOSTerror(ERR_R_MALLOC_FAILURE);
77			return NULL;
78			}
79			BN_bin2bn(sig, siglen / 2, s->s);
80			BN_bin2bn(sig + siglen / 2, siglen / 2, s->r);
81			return s;
82			}
83
84			static int
85			pack_signature_cp(ECDSA_SIG s, int order, unsigned char sig, size_t *siglen)
86			{
87			int r_len = BN_num_bytes(s->r);
88			int s_len = BN_num_bytes(s->s);
89
90			if (r_len > order \|\| s_len > order)
91			return 0;
92
93			siglen = 2 order;
94
95			memset(sig, 0, *siglen);
96			BN_bn2bin(s->s, sig + order - s_len);
97			BN_bn2bin(s->r, sig + 2 * order - r_len);
98			ECDSA_SIG_free(s);
99			return 1;
100			}
101
102			static ECDSA_SIG *
103			unpack_signature_le(const unsigned char *sig, size_t siglen)
104			{
105			ECDSA_SIG *s;
106
107			s = ECDSA_SIG_new();
108			if (s == NULL) {
109			GOSTerror(ERR_R_MALLOC_FAILURE);
110			return NULL;
111			}
112			GOST_le2bn(sig, siglen / 2, s->r);
113			GOST_le2bn(sig + siglen / 2, siglen / 2, s->s);
114			return s;
115			}
116
117			static int
118			pack_signature_le(ECDSA_SIG s, int order, unsigned char sig, size_t *siglen)
119			{
120			siglen = 2 order;
121			memset(sig, 0, *siglen);
122			GOST_bn2le(s->r, sig, order);
123			GOST_bn2le(s->s, sig + order, order);
124			ECDSA_SIG_free(s);
125			return 1;
126			}
127
128			struct gost_pmeth_data {
129			int sign_param_nid; /* Should be set whenever parameters are filled */
130			int digest_nid;
131			EVP_MD *md;
132			unsigned char *shared_ukm;
133			int peer_key_used;
134			int sig_format;
135			};
136
137			static int
138			pkey_gost01_init(EVP_PKEY_CTX *ctx)
139			{
140			struct gost_pmeth_data *data;
141			EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
142
143			data = calloc(1, sizeof(struct gost_pmeth_data));
144			if (data == NULL)
145			return 0;
146
147			if (pkey != NULL && pkey->pkey.gost != NULL) {
148			data->sign_param_nid =
149			EC_GROUP_get_curve_name(GOST_KEY_get0_group(pkey->pkey.gost));
150			data->digest_nid = GOST_KEY_get_digest(pkey->pkey.gost);
151			}
152			EVP_PKEY_CTX_set_data(ctx, data);
153			return 1;
154			}
155
156			/* Copies contents of gost_pmeth_data structure */
157			static int
158			pkey_gost01_copy(EVP_PKEY_CTX dst, EVP_PKEY_CTX src)
159			{
160			struct gost_pmeth_data dst_data, src_data;
161
162			if (pkey_gost01_init(dst) == 0)
163			return 0;
164
165			src_data = EVP_PKEY_CTX_get_data(src);
166			dst_data = EVP_PKEY_CTX_get_data(dst);
167			dst_data = src_data;
168			if (src_data->shared_ukm != NULL)
169			dst_data->shared_ukm = NULL;
170			return 1;
171			}
172
173			/* Frees up gost_pmeth_data structure */
174			static void
175			pkey_gost01_cleanup(EVP_PKEY_CTX *ctx)
176			{
177			struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
178
179			free(data->shared_ukm);
180			free(data);
181			}
182
183			static int
184			pkey_gost01_paramgen(EVP_PKEY_CTX ctx, EVP_PKEY pkey)
185			{
186			struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
187			EC_GROUP *group = NULL;
188			GOST_KEY *gost = NULL;
189			int ret = 0;
190
191			if (data->sign_param_nid == NID_undef \|\|
192			data->digest_nid == NID_undef) {
193			GOSTerror(GOST_R_NO_PARAMETERS_SET);
194			return 0;
195			}
196
197			group = EC_GROUP_new_by_curve_name(data->sign_param_nid);
198			if (group == NULL)
199			goto done;
200
201			EC_GROUP_set_asn1_flag(group, OPENSSL_EC_NAMED_CURVE);
202
203			gost = GOST_KEY_new();
204			if (gost == NULL)
205			goto done;
206
207			if (GOST_KEY_set_digest(gost, data->digest_nid) == 0)
208			goto done;
209
210			if (GOST_KEY_set_group(gost, group) != 0)
211			ret = EVP_PKEY_assign_GOST(pkey, gost);
212
213			done:
214			if (ret == 0)
215			GOST_KEY_free(gost);
216			EC_GROUP_free(group);
217			return ret;
218			}
219
220			static int
221			pkey_gost01_keygen(EVP_PKEY_CTX ctx, EVP_PKEY pkey)
222			{
223			if (pkey_gost01_paramgen(ctx, pkey) == 0)
224			return 0;
225			return gost2001_keygen(pkey->pkey.gost) != 0;
226			}
227
228			static int
229			pkey_gost01_sign(EVP_PKEY_CTX ctx, unsigned char sig, size_t *siglen,
230			const unsigned char *tbs, size_t tbs_len)
231			{
232			ECDSA_SIG *unpacked_sig = NULL;
233			EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx);
234			struct gost_pmeth_data *pctx = EVP_PKEY_CTX_get_data(ctx);
235			BIGNUM *md;
236			size_t size;
237			int ret;
238
239			if (pkey == NULL \|\| pkey->pkey.gost == NULL)
240			return 0;
241			size = GOST_KEY_get_size(pkey->pkey.gost);
242
243			if (siglen == NULL)
244			return 0;
245			if (sig == NULL) {
246			siglen = 2 size;
247			return 1;
248			} else if (siglen < 2 size) {
249			GOSTerror(EC_R_BUFFER_TOO_SMALL);
250			return 0;
251			}
252			if (tbs_len != 32 && tbs_len != 64) {
253			GOSTerror(EVP_R_BAD_BLOCK_LENGTH);
254			return 0;
255			}
256			md = GOST_le2bn(tbs, tbs_len, NULL);
257			if (md == NULL)
258			return 0;
259			unpacked_sig = gost2001_do_sign(md, pkey->pkey.gost);
260			BN_free(md);
261			if (unpacked_sig == NULL) {
262			return 0;
263			}
264			switch (pctx->sig_format) {
265			case GOST_SIG_FORMAT_SR_BE:
266			ret = pack_signature_cp(unpacked_sig, size, sig, siglen);
267			break;
268			case GOST_SIG_FORMAT_RS_LE:
269			ret = pack_signature_le(unpacked_sig, size, sig, siglen);
270			break;
271			default:
272			ret = -1;
273			break;
274			}
275			if (ret <= 0)
276			ECDSA_SIG_free(unpacked_sig);
277			return ret;
278			}
279
280			static int
281			pkey_gost01_verify(EVP_PKEY_CTX ctx, const unsigned char sig, size_t siglen,
282			const unsigned char *tbs, size_t tbs_len)
283			{
284			int ok = 0;
285			EVP_PKEY *pub_key = EVP_PKEY_CTX_get0_pkey(ctx);
286			struct gost_pmeth_data *pctx = EVP_PKEY_CTX_get_data(ctx);
287			ECDSA_SIG *s = NULL;
288			BIGNUM *md;
289
290			if (pub_key == NULL)
291			return 0;
292			switch (pctx->sig_format) {
293			case GOST_SIG_FORMAT_SR_BE:
294			s = unpack_signature_cp(sig, siglen);
295			break;
296			case GOST_SIG_FORMAT_RS_LE:
297			s = unpack_signature_le(sig, siglen);
298			break;
299			}
300			if (s == NULL)
301			return 0;
302			md = GOST_le2bn(tbs, tbs_len, NULL);
303			if (md == NULL)
304			goto err;
305			ok = gost2001_do_verify(md, s, pub_key->pkey.gost);
306
307			err:
308			BN_free(md);
309			ECDSA_SIG_free(s);
310			return ok;
311			}
312
313			static int
314			gost01_VKO_key(EVP_PKEY pub_key, EVP_PKEY priv_key, const unsigned char *ukm,
315			unsigned char *key)
316			{
317			unsigned char hashbuf[128];
318			int digest_nid;
319			int ret = 0;
320			BN_CTX *ctx = BN_CTX_new();
321			BIGNUM UKM, X, *Y;
322
323			if (ctx == NULL)
324			return 0;
325
326			BN_CTX_start(ctx);
327			if ((UKM = BN_CTX_get(ctx)) == NULL)
328			goto err;
329			if ((X = BN_CTX_get(ctx)) == NULL)
330			goto err;
331			if ((Y = BN_CTX_get(ctx)) == NULL)
332			goto err;
333
334			GOST_le2bn(ukm, 8, UKM);
335
336			digest_nid = GOST_KEY_get_digest(priv_key->pkey.gost);
337			if (VKO_compute_key(X, Y, pub_key->pkey.gost, priv_key->pkey.gost,
338			UKM) == 0)
339			goto err;
340
341			switch (digest_nid) {
342			case NID_id_GostR3411_94_CryptoProParamSet:
343			GOST_bn2le(X, hashbuf, 32);
344			GOST_bn2le(Y, hashbuf + 32, 32);
345			GOSTR341194(hashbuf, 64, key, digest_nid);
346			ret = 1;
347			break;
348			case NID_id_tc26_gost3411_2012_256:
349			GOST_bn2le(X, hashbuf, 32);
350			GOST_bn2le(Y, hashbuf + 32, 32);
351			STREEBOG256(hashbuf, 64, key);
352			ret = 1;
353			break;
354			case NID_id_tc26_gost3411_2012_512:
355			GOST_bn2le(X, hashbuf, 64);
356			GOST_bn2le(Y, hashbuf + 64, 64);
357			STREEBOG256(hashbuf, 128, key);
358			ret = 1;
359			break;
360			default:
361			ret = -2;
362			break;
363			}
364			err:
365			BN_CTX_end(ctx);
366			BN_CTX_free(ctx);
367			return ret;
368			}
369
370			int
371			pkey_gost01_decrypt(EVP_PKEY_CTX pctx, unsigned char key, size_t *key_len,
372			const unsigned char *in, size_t in_len)
373			{
374			const unsigned char *p = in;
375			EVP_PKEY *priv = EVP_PKEY_CTX_get0_pkey(pctx);
376			GOST_KEY_TRANSPORT *gkt = NULL;
377			int ret = 0;
378			unsigned char wrappedKey[44];
379			unsigned char sharedKey[32];
380			EVP_PKEY eph_key = NULL, peerkey = NULL;
381			int nid;
382
383			if (key == NULL) {
384			*key_len = 32;
385			return 1;
386			}
387			gkt = d2i_GOST_KEY_TRANSPORT(NULL, (const unsigned char **)&p, in_len);
388			if (gkt == NULL) {
389			GOSTerror(GOST_R_ERROR_PARSING_KEY_TRANSPORT_INFO);
390			return -1;
391			}
392
393			/* If key transport structure contains public key, use it */
394			eph_key = X509_PUBKEY_get(gkt->key_agreement_info->ephem_key);
395			if (eph_key != NULL) {
396			if (EVP_PKEY_derive_set_peer(pctx, eph_key) <= 0) {
397			GOSTerror(GOST_R_INCOMPATIBLE_PEER_KEY);
398			goto err;
399			}
400			} else {
401			/* Set control "public key from client certificate used" */
402			if (EVP_PKEY_CTX_ctrl(pctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 3,
403			NULL) <= 0) {
404			GOSTerror(GOST_R_CTRL_CALL_FAILED);
405			goto err;
406			}
407			}
408			peerkey = EVP_PKEY_CTX_get0_peerkey(pctx);
409			if (peerkey == NULL) {
410			GOSTerror(GOST_R_NO_PEER_KEY);
411			goto err;
412			}
413
414			nid = OBJ_obj2nid(gkt->key_agreement_info->cipher);
415
416			if (gkt->key_agreement_info->eph_iv->length != 8) {
417			GOSTerror(GOST_R_INVALID_IV_LENGTH);
418			goto err;
419			}
420			memcpy(wrappedKey, gkt->key_agreement_info->eph_iv->data, 8);
421			if (gkt->key_info->encrypted_key->length != 32) {
422			GOSTerror(EVP_R_BAD_KEY_LENGTH);
423			goto err;
424			}
425			memcpy(wrappedKey + 8, gkt->key_info->encrypted_key->data, 32);
426			if (gkt->key_info->imit->length != 4) {
427			GOSTerror(ERR_R_INTERNAL_ERROR);
428			goto err;
429			}
430			memcpy(wrappedKey + 40, gkt->key_info->imit->data, 4);
431			if (gost01_VKO_key(peerkey, priv, wrappedKey, sharedKey) <= 0)
432			goto err;
433			if (gost_key_unwrap_crypto_pro(nid, sharedKey, wrappedKey, key) == 0) {
434			GOSTerror(GOST_R_ERROR_COMPUTING_SHARED_KEY);
435			goto err;
436			}
437
438			ret = 1;
439			err:
440			EVP_PKEY_free(eph_key);
441			GOST_KEY_TRANSPORT_free(gkt);
442			return ret;
443			}
444
445			int
446			pkey_gost01_derive(EVP_PKEY_CTX ctx, unsigned char key, size_t *keylen)
447			{
448			/*
449			* Public key of peer in the ctx field peerkey
450			* Our private key in the ctx pkey
451			* ukm is in the algorithm specific context data
452			*/
453			EVP_PKEY *my_key = EVP_PKEY_CTX_get0_pkey(ctx);
454			EVP_PKEY *peer_key = EVP_PKEY_CTX_get0_peerkey(ctx);
455			struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(ctx);
456
457			if (data->shared_ukm == NULL) {
458			GOSTerror(GOST_R_UKM_NOT_SET);
459			return 0;
460			}
461
462			if (key == NULL) {
463			*keylen = 32;
464			return 32;
465			}
466
467			if (gost01_VKO_key(peer_key, my_key, data->shared_ukm, key) <= 0)
468			return 0;
469
470			*keylen = 32;
471			return 1;
472			}
473
474			int
475			pkey_gost01_encrypt(EVP_PKEY_CTX pctx, unsigned char out, size_t *out_len,
476			const unsigned char *key, size_t key_len)
477			{
478			GOST_KEY_TRANSPORT *gkt = NULL;
479			EVP_PKEY *pubk = EVP_PKEY_CTX_get0_pkey(pctx);
480			struct gost_pmeth_data *data = EVP_PKEY_CTX_get_data(pctx);
481			unsigned char ukm[8], shared_key[32], crypted_key[44];
482			int ret = 0;
483			int key_is_ephemeral;
484			EVP_PKEY *sec_key = EVP_PKEY_CTX_get0_peerkey(pctx);
485			int nid = NID_id_Gost28147_89_CryptoPro_A_ParamSet;
486
487			if (data->shared_ukm != NULL) {
488			memcpy(ukm, data->shared_ukm, 8);
489			} else /* if (out != NULL) */ {
490			arc4random_buf(ukm, 8);
491			}
492			/* Check for private key in the peer_key of context */
493			if (sec_key) {
494			key_is_ephemeral = 0;
495			if (GOST_KEY_get0_private_key(sec_key->pkey.gost) == 0) {
496			GOSTerror(GOST_R_NO_PRIVATE_PART_OF_NON_EPHEMERAL_KEYPAIR);
497			goto err;
498			}
499			} else {
500			key_is_ephemeral = 1;
501			if (out != NULL) {
502			GOST_KEY *tmp_key;
503
504			sec_key = EVP_PKEY_new();
505			if (sec_key == NULL)
506			goto err;
507			tmp_key = GOST_KEY_new();
508			if (tmp_key == NULL)
509			goto err;
510			if (EVP_PKEY_assign(sec_key, EVP_PKEY_base_id(pubk),
511			tmp_key) == 0) {
512			GOST_KEY_free(tmp_key);
513			goto err;
514			}
515			if (EVP_PKEY_copy_parameters(sec_key, pubk) == 0)
516			goto err;
517			if (gost2001_keygen(sec_key->pkey.gost) == 0) {
518			goto err;
519			}
520			}
521			}
522
523			if (out != NULL) {
524			if (gost01_VKO_key(pubk, sec_key, ukm, shared_key) <= 0)
525			goto err;
526			gost_key_wrap_crypto_pro(nid, shared_key, ukm, key,
527			crypted_key);
528			}
529			gkt = GOST_KEY_TRANSPORT_new();
530			if (gkt == NULL)
531			goto err;
532			if (ASN1_OCTET_STRING_set(gkt->key_agreement_info->eph_iv, ukm, 8) == 0)
533			goto err;
534			if (ASN1_OCTET_STRING_set(gkt->key_info->imit, crypted_key + 40,
535			4) == 0)
536			goto err;
537			if (ASN1_OCTET_STRING_set(gkt->key_info->encrypted_key, crypted_key + 8,
538			32) == 0)
539			goto err;
540			if (key_is_ephemeral) {
541			if (X509_PUBKEY_set(&gkt->key_agreement_info->ephem_key,
542			out != NULL ? sec_key : pubk) == 0) {
543			GOSTerror(GOST_R_CANNOT_PACK_EPHEMERAL_KEY);
544			goto err;
545			}
546			}
547			ASN1_OBJECT_free(gkt->key_agreement_info->cipher);
548			gkt->key_agreement_info->cipher = OBJ_nid2obj(nid);
549			if (key_is_ephemeral)
550			EVP_PKEY_free(sec_key);
551			else {
552			/* Set control "public key from client certificate used" */
553			if (EVP_PKEY_CTX_ctrl(pctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 3,
554			NULL) <= 0) {
555			GOSTerror(GOST_R_CTRL_CALL_FAILED);
556			goto err;
557			}
558			}
559			if ((*out_len = i2d_GOST_KEY_TRANSPORT(gkt, out ? &out : NULL)) > 0)
560			ret = 1;
561			GOST_KEY_TRANSPORT_free(gkt);
562			return ret;
563
564			err:
565			if (key_is_ephemeral)
566			EVP_PKEY_free(sec_key);
567			GOST_KEY_TRANSPORT_free(gkt);
568			return -1;
569			}
570
571
572			static int
573			pkey_gost01_ctrl(EVP_PKEY_CTX ctx, int type, int p1, void p2)
574			{
575			struct gost_pmeth_data *pctx = EVP_PKEY_CTX_get_data(ctx);
576
577			switch (type) {
578			case EVP_PKEY_CTRL_MD:
579			if (EVP_MD_type(p2) !=
580			GostR3410_get_md_digest(pctx->digest_nid)) {
581			GOSTerror(GOST_R_INVALID_DIGEST_TYPE);
582			return 0;
583			}
584			pctx->md = p2;
585			return 1;
586			case EVP_PKEY_CTRL_PKCS7_ENCRYPT:
587			case EVP_PKEY_CTRL_PKCS7_DECRYPT:
588			case EVP_PKEY_CTRL_PKCS7_SIGN:
589			case EVP_PKEY_CTRL_DIGESTINIT:
590			return 1;
591
592			case EVP_PKEY_CTRL_GOST_PARAMSET:
593			pctx->sign_param_nid = (int)p1;
594			return 1;
595
596			case EVP_PKEY_CTRL_SET_IV:
597			{
598			char *ukm = malloc(p1);
599
600			if (ukm == NULL) {
601			GOSTerror(ERR_R_MALLOC_FAILURE);
602			return 0;
603			}
604			memcpy(ukm, p2, p1);
605			free(pctx->shared_ukm);
606			pctx->shared_ukm = ukm;
607			return 1;
608			}
609
610			case EVP_PKEY_CTRL_PEER_KEY:
611			if (p1 == 0 \|\| p1 == 1) /* call from EVP_PKEY_derive_set_peer */
612			return 1;
613			if (p1 == 2) /* TLS: peer key used? */
614			return pctx->peer_key_used;
615			if (p1 == 3) /* TLS: peer key used! */
616			return (pctx->peer_key_used = 1);
617			return -2;
618			case EVP_PKEY_CTRL_GOST_SIG_FORMAT:
619			switch (p1) {
620			case GOST_SIG_FORMAT_SR_BE:
621			case GOST_SIG_FORMAT_RS_LE:
622			pctx->sig_format = p1;
623			return 1;
624			default:
625			return 0;
626			}
627			break;
628			case EVP_PKEY_CTRL_GOST_SET_DIGEST:
629			pctx->digest_nid = (int)p1;
630			return 1;
631			case EVP_PKEY_CTRL_GOST_GET_DIGEST:
632			(int )p2 = pctx->digest_nid;
633			return 1;
634			default:
635			return -2;
636			}
637			}
638
639			static int
640			pkey_gost01_ctrl_str(EVP_PKEY_CTX ctx, const char type, const char *value)
641			{
642			int param_nid = NID_undef;
643			int digest_nid = NID_undef;
644
645			if (strcmp(type, "paramset") == 0) {
646			if (value == NULL)
647			return 0;
648			if (pkey_gost01_ctrl(ctx, EVP_PKEY_CTRL_GOST_GET_DIGEST, 0,
649			&digest_nid) == 0)
650			return 0;
651			if (digest_nid == NID_id_tc26_gost3411_2012_512)
652			param_nid = GostR3410_512_param_id(value);
653			else
654			param_nid = GostR3410_256_param_id(value);
655			if (param_nid == NID_undef)
656			param_nid = OBJ_txt2nid(value);
657			if (param_nid == NID_undef)
658			return 0;
659
660			return pkey_gost01_ctrl(ctx, EVP_PKEY_CTRL_GOST_PARAMSET,
661			param_nid, NULL);
662			}
663			if (strcmp(type, "dgst") == 0) {
664			if (value == NULL)
665			return 0;
666			else if (strcmp(value, "gost94") == 0 \|\|
667			strcmp(value, "md_gost94") == 0)
668			digest_nid = NID_id_GostR3411_94_CryptoProParamSet;
669			else if (strcmp(value, "streebog256") == 0)
670			digest_nid = NID_id_tc26_gost3411_2012_256;
671			else if (strcmp(value, "streebog512") == 0)
672			digest_nid = NID_id_tc26_gost3411_2012_512;
673
674			if (digest_nid == NID_undef)
675			return 0;
676
677			return pkey_gost01_ctrl(ctx, EVP_PKEY_CTRL_GOST_SET_DIGEST,
678			digest_nid, NULL);
679			}
680			return -2;
681			}
682
683			const EVP_PKEY_METHOD gostr01_pkey_meth = {
684			.pkey_id = EVP_PKEY_GOSTR01,
685
686			.init = pkey_gost01_init,
687			.copy = pkey_gost01_copy,
688			.cleanup = pkey_gost01_cleanup,
689
690			.paramgen = pkey_gost01_paramgen,
691			.keygen = pkey_gost01_keygen,
692			.sign = pkey_gost01_sign,
693			.verify = pkey_gost01_verify,
694
695			.encrypt = pkey_gost01_encrypt,
696			.decrypt = pkey_gost01_decrypt,
697			.derive = pkey_gost01_derive,
698
699			.ctrl = pkey_gost01_ctrl,
700			.ctrl_str = pkey_gost01_ctrl_str,
701			};
702			#endif