/*
- * 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).
+ * Copyright 2006-2021 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
+ */
+
+/*
+ * DH & DSA low level APIs are deprecated for public use, but still ok for
+ * internal use.
*/
+#include "internal/deprecated.h"
#include <stdio.h>
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
#include <openssl/asn1t.h>
#include <openssl/x509.h>
#include <openssl/evp.h>
-#include <openssl/dh.h>
+#include "dh_local.h"
#include <openssl/bn.h>
-#ifndef OPENSSL_NO_DSA
-# include <openssl/dsa.h>
-#endif
+#include <openssl/dsa.h>
#include <openssl/objects.h>
-#include "internal/evp_int.h"
+#include "crypto/evp.h"
/* DH pkey context structure */
/* Parameter gen parameters */
int prime_len;
int generator;
- int use_dsa;
+ int paramgen_type;
int subprime_len;
+ int pad;
/* message digest used for parameter generation */
const EVP_MD *md;
- int rfc5114_param;
+ int param_nid;
/* Keygen callback info */
int gentmp[2];
/* KDF (if any) to use for DH */
static int pkey_dh_init(EVP_PKEY_CTX *ctx)
{
DH_PKEY_CTX *dctx;
- dctx = OPENSSL_malloc(sizeof(*dctx));
- if (!dctx)
+
+ if ((dctx = OPENSSL_zalloc(sizeof(*dctx))) == NULL)
return 0;
- dctx->prime_len = 1024;
+ dctx->prime_len = 2048;
dctx->subprime_len = -1;
dctx->generator = 2;
- dctx->use_dsa = 0;
- dctx->md = NULL;
- dctx->rfc5114_param = 0;
-
dctx->kdf_type = EVP_PKEY_DH_KDF_NONE;
- dctx->kdf_oid = NULL;
- dctx->kdf_md = NULL;
- dctx->kdf_ukm = NULL;
- dctx->kdf_ukmlen = 0;
- dctx->kdf_outlen = 0;
ctx->data = dctx;
ctx->keygen_info = dctx->gentmp;
return 1;
}
-static int pkey_dh_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
+static void pkey_dh_cleanup(EVP_PKEY_CTX *ctx)
+{
+ DH_PKEY_CTX *dctx = ctx->data;
+
+ if (dctx != NULL) {
+ OPENSSL_free(dctx->kdf_ukm);
+ ASN1_OBJECT_free(dctx->kdf_oid);
+ OPENSSL_free(dctx);
+ }
+}
+
+
+static int pkey_dh_copy(EVP_PKEY_CTX *dst, const EVP_PKEY_CTX *src)
{
DH_PKEY_CTX *dctx, *sctx;
+
if (!pkey_dh_init(dst))
return 0;
sctx = src->data;
dctx->prime_len = sctx->prime_len;
dctx->subprime_len = sctx->subprime_len;
dctx->generator = sctx->generator;
- dctx->use_dsa = sctx->use_dsa;
+ dctx->paramgen_type = sctx->paramgen_type;
+ dctx->pad = sctx->pad;
dctx->md = sctx->md;
- dctx->rfc5114_param = sctx->rfc5114_param;
+ dctx->param_nid = sctx->param_nid;
dctx->kdf_type = sctx->kdf_type;
dctx->kdf_oid = OBJ_dup(sctx->kdf_oid);
- if (!dctx->kdf_oid)
+ if (dctx->kdf_oid == NULL)
return 0;
dctx->kdf_md = sctx->kdf_md;
- if (dctx->kdf_ukm) {
- dctx->kdf_ukm = BUF_memdup(sctx->kdf_ukm, sctx->kdf_ukmlen);
+ if (sctx->kdf_ukm != NULL) {
+ dctx->kdf_ukm = OPENSSL_memdup(sctx->kdf_ukm, sctx->kdf_ukmlen);
+ if (dctx->kdf_ukm == NULL)
+ return 0;
dctx->kdf_ukmlen = sctx->kdf_ukmlen;
}
dctx->kdf_outlen = sctx->kdf_outlen;
return 1;
}
-static void pkey_dh_cleanup(EVP_PKEY_CTX *ctx)
-{
- DH_PKEY_CTX *dctx = ctx->data;
- if (dctx) {
- OPENSSL_free(dctx->kdf_ukm);
- ASN1_OBJECT_free(dctx->kdf_oid);
- OPENSSL_free(dctx);
- }
-}
-
static int pkey_dh_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
{
DH_PKEY_CTX *dctx = ctx->data;
return 1;
case EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN:
- if (dctx->use_dsa == 0)
+ if (dctx->paramgen_type == DH_PARAMGEN_TYPE_GENERATOR)
return -2;
dctx->subprime_len = p1;
return 1;
+ case EVP_PKEY_CTRL_DH_PAD:
+ dctx->pad = p1;
+ return 1;
+
case EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR:
- if (dctx->use_dsa)
+ if (dctx->paramgen_type != DH_PARAMGEN_TYPE_GENERATOR)
return -2;
dctx->generator = p1;
return 1;
case EVP_PKEY_CTRL_DH_PARAMGEN_TYPE:
#ifdef OPENSSL_NO_DSA
- if (p1 != 0)
+ if (p1 != DH_PARAMGEN_TYPE_GENERATOR)
return -2;
#else
if (p1 < 0 || p1 > 2)
return -2;
#endif
- dctx->use_dsa = p1;
+ dctx->paramgen_type = p1;
return 1;
case EVP_PKEY_CTRL_DH_RFC5114:
- if (p1 < 1 || p1 > 3)
+ if (p1 < 1 || p1 > 3 || dctx->param_nid != NID_undef)
+ return -2;
+ dctx->param_nid = p1;
+ return 1;
+
+ case EVP_PKEY_CTRL_DH_NID:
+ if (p1 <= 0 || dctx->param_nid != NID_undef)
return -2;
- dctx->rfc5114_param = p1;
+ dctx->param_nid = p1;
return 1;
case EVP_PKEY_CTRL_PEER_KEY:
}
if (strcmp(type, "dh_rfc5114") == 0) {
DH_PKEY_CTX *dctx = ctx->data;
- int len;
- len = atoi(value);
- if (len < 0 || len > 3)
+ int id;
+
+ id = atoi(value);
+ if (id < 0 || id > 3)
+ return -2;
+ dctx->param_nid = id;
+ return 1;
+ }
+ if (strcmp(type, "dh_param") == 0) {
+ DH_PKEY_CTX *dctx = ctx->data;
+ int nid = OBJ_sn2nid(value);
+
+ if (nid == NID_undef) {
+ ERR_raise(ERR_LIB_DH, DH_R_INVALID_PARAMETER_NAME);
return -2;
- dctx->rfc5114_param = len;
+ }
+ dctx->param_nid = nid;
return 1;
}
if (strcmp(type, "dh_paramgen_generator") == 0) {
typ = atoi(value);
return EVP_PKEY_CTX_set_dh_paramgen_type(ctx, typ);
}
+ if (strcmp(type, "dh_pad") == 0) {
+ int pad;
+ pad = atoi(value);
+ return EVP_PKEY_CTX_set_dh_pad(ctx, pad);
+ }
return -2;
}
-#ifndef OPENSSL_NO_DSA
-
-extern int dsa_builtin_paramgen(DSA *ret, size_t bits, size_t qbits,
- const EVP_MD *evpmd,
- const unsigned char *seed_in, size_t seed_len,
- unsigned char *seed_out, int *counter_ret,
- unsigned long *h_ret, BN_GENCB *cb);
-
-extern int dsa_builtin_paramgen2(DSA *ret, size_t L, size_t N,
- const EVP_MD *evpmd,
- const unsigned char *seed_in,
- size_t seed_len, int idx,
- unsigned char *seed_out, int *counter_ret,
- unsigned long *h_ret, BN_GENCB *cb);
-
-static DSA *dsa_dh_generate(DH_PKEY_CTX *dctx, BN_GENCB *pcb)
+static DH *ffc_params_generate(OSSL_LIB_CTX *libctx, DH_PKEY_CTX *dctx,
+ BN_GENCB *pcb)
{
- DSA *ret;
+ DH *ret;
int rv = 0;
+ int res;
int prime_len = dctx->prime_len;
int subprime_len = dctx->subprime_len;
- const EVP_MD *md = dctx->md;
- if (dctx->use_dsa > 2)
+
+ if (dctx->paramgen_type > DH_PARAMGEN_TYPE_FIPS_186_4)
return NULL;
- ret = DSA_new();
- if (!ret)
+ ret = DH_new();
+ if (ret == NULL)
return NULL;
+
if (subprime_len == -1) {
if (prime_len >= 2048)
subprime_len = 256;
else
subprime_len = 160;
}
- if (md == NULL) {
- if (prime_len >= 2048)
- md = EVP_sha256();
- else
- md = EVP_sha1();
- }
- if (dctx->use_dsa == 1)
- rv = dsa_builtin_paramgen(ret, prime_len, subprime_len, md,
- NULL, 0, NULL, NULL, NULL, pcb);
- else if (dctx->use_dsa == 2)
- rv = dsa_builtin_paramgen2(ret, prime_len, subprime_len, md,
- NULL, 0, -1, NULL, NULL, NULL, pcb);
+
+ if (dctx->md != NULL)
+ ossl_ffc_set_digest(&ret->params, EVP_MD_get0_name(dctx->md), NULL);
+
+# ifndef FIPS_MODULE
+ if (dctx->paramgen_type == DH_PARAMGEN_TYPE_FIPS_186_2)
+ rv = ossl_ffc_params_FIPS186_2_generate(libctx, &ret->params,
+ FFC_PARAM_TYPE_DH,
+ prime_len, subprime_len, &res,
+ pcb);
+ else
+# endif
+ /* For FIPS we always use the DH_PARAMGEN_TYPE_FIPS_186_4 generator */
+ if (dctx->paramgen_type >= DH_PARAMGEN_TYPE_FIPS_186_2)
+ rv = ossl_ffc_params_FIPS186_4_generate(libctx, &ret->params,
+ FFC_PARAM_TYPE_DH,
+ prime_len, subprime_len, &res,
+ pcb);
if (rv <= 0) {
- DSA_free(ret);
+ DH_free(ret);
return NULL;
}
return ret;
}
-#endif
-
-static int pkey_dh_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
+static int pkey_dh_paramgen(EVP_PKEY_CTX *ctx,
+ EVP_PKEY *pkey)
{
DH *dh = NULL;
DH_PKEY_CTX *dctx = ctx->data;
- BN_GENCB *pcb;
+ BN_GENCB *pcb = NULL;
int ret;
- if (dctx->rfc5114_param) {
- switch (dctx->rfc5114_param) {
- case 1:
- dh = DH_get_1024_160();
- break;
-
- case 2:
- dh = DH_get_2048_224();
- break;
- case 3:
- dh = DH_get_2048_256();
- break;
+ /*
+ * Look for a safe prime group for key establishment. Which uses
+ * either RFC_3526 (modp_XXXX) or RFC_7919 (ffdheXXXX).
+ * RFC_5114 is also handled here for param_nid = (1..3)
+ */
+ if (dctx->param_nid != NID_undef) {
+ int type = dctx->param_nid <= 3 ? EVP_PKEY_DHX : EVP_PKEY_DH;
- default:
- return -2;
- }
- EVP_PKEY_assign(pkey, EVP_PKEY_DHX, dh);
+ if ((dh = DH_new_by_nid(dctx->param_nid)) == NULL)
+ return 0;
+ EVP_PKEY_assign(pkey, type, dh);
return 1;
}
- if (ctx->pkey_gencb) {
+ if (ctx->pkey_gencb != NULL) {
pcb = BN_GENCB_new();
+ if (pcb == NULL)
+ return 0;
evp_pkey_set_cb_translate(pcb, ctx);
- } else
- pcb = NULL;
-#ifndef OPENSSL_NO_DSA
- if (dctx->use_dsa) {
- DSA *dsa_dh;
- dsa_dh = dsa_dh_generate(dctx, pcb);
+ }
+# ifdef FIPS_MODULE
+ dctx->paramgen_type = DH_PARAMGEN_TYPE_FIPS_186_4;
+# endif /* FIPS_MODULE */
+ if (dctx->paramgen_type >= DH_PARAMGEN_TYPE_FIPS_186_2) {
+ dh = ffc_params_generate(NULL, dctx, pcb);
BN_GENCB_free(pcb);
- if (!dsa_dh)
- return 0;
- dh = DSA_dup_DH(dsa_dh);
- DSA_free(dsa_dh);
- if (!dh)
+ if (dh == NULL)
return 0;
EVP_PKEY_assign(pkey, EVP_PKEY_DHX, dh);
return 1;
}
-#endif
dh = DH_new();
- if (!dh) {
+ if (dh == NULL) {
BN_GENCB_free(pcb);
return 0;
}
static int pkey_dh_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
{
+ DH_PKEY_CTX *dctx = ctx->data;
DH *dh = NULL;
- if (ctx->pkey == NULL) {
- DHerr(DH_F_PKEY_DH_KEYGEN, DH_R_NO_PARAMETERS_SET);
+
+ if (ctx->pkey == NULL && dctx->param_nid == NID_undef) {
+ ERR_raise(ERR_LIB_DH, DH_R_NO_PARAMETERS_SET);
return 0;
}
- dh = DH_new();
- if (!dh)
+ if (dctx->param_nid != NID_undef)
+ dh = DH_new_by_nid(dctx->param_nid);
+ else
+ dh = DH_new();
+ if (dh == NULL)
return 0;
EVP_PKEY_assign(pkey, ctx->pmeth->pkey_id, dh);
/* Note: if error return, pkey is freed by parent routine */
- if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
+ if (ctx->pkey != NULL && !EVP_PKEY_copy_parameters(pkey, ctx->pkey))
return 0;
- return DH_generate_key(pkey->pkey.dh);
+ return DH_generate_key((DH *)EVP_PKEY_get0_DH(pkey));
}
static int pkey_dh_derive(EVP_PKEY_CTX *ctx, unsigned char *key,
{
int ret;
DH *dh;
+ const DH *dhpub;
DH_PKEY_CTX *dctx = ctx->data;
- BIGNUM *dhpub;
- if (!ctx->pkey || !ctx->peerkey) {
- DHerr(DH_F_PKEY_DH_DERIVE, DH_R_KEYS_NOT_SET);
+ BIGNUM *dhpubbn;
+
+ if (ctx->pkey == NULL || ctx->peerkey == NULL) {
+ ERR_raise(ERR_LIB_DH, DH_R_KEYS_NOT_SET);
+ return 0;
+ }
+ dh = (DH *)EVP_PKEY_get0_DH(ctx->pkey);
+ dhpub = EVP_PKEY_get0_DH(ctx->peerkey);
+ if (dhpub == NULL) {
+ ERR_raise(ERR_LIB_DH, DH_R_KEYS_NOT_SET);
return 0;
}
- dh = ctx->pkey->pkey.dh;
- dhpub = ctx->peerkey->pkey.dh->pub_key;
+ dhpubbn = dhpub->pub_key;
if (dctx->kdf_type == EVP_PKEY_DH_KDF_NONE) {
if (key == NULL) {
*keylen = DH_size(dh);
return 1;
}
- ret = DH_compute_key(key, dhpub, dh);
+ if (dctx->pad)
+ ret = DH_compute_key_padded(key, dhpubbn, dh);
+ else
+ ret = DH_compute_key(key, dhpubbn, dh);
if (ret < 0)
return ret;
*keylen = ret;
return 1;
- } else if (dctx->kdf_type == EVP_PKEY_DH_KDF_X9_42) {
+ }
+ else if (dctx->kdf_type == EVP_PKEY_DH_KDF_X9_42) {
+
unsigned char *Z = NULL;
- size_t Zlen = 0;
+ int Zlen = 0;
+
if (!dctx->kdf_outlen || !dctx->kdf_oid)
return 0;
if (key == NULL) {
if (*keylen != dctx->kdf_outlen)
return 0;
ret = 0;
- Zlen = DH_size(dh);
- Z = OPENSSL_malloc(Zlen);
- if (!Z) {
- goto err;
- }
- if (DH_compute_key_padded(Z, dhpub, dh) <= 0)
+ if ((Zlen = DH_size(dh)) <= 0)
+ return 0;
+ if ((Z = OPENSSL_malloc(Zlen)) == NULL)
+ return 0;
+ if (DH_compute_key_padded(Z, dhpubbn, dh) <= 0)
goto err;
if (!DH_KDF_X9_42(key, *keylen, Z, Zlen, dctx->kdf_oid,
dctx->kdf_ukm, dctx->kdf_ukmlen, dctx->kdf_md))
OPENSSL_clear_free(Z, Zlen);
return ret;
}
- return 1;
+ return 0;
}
-const EVP_PKEY_METHOD dh_pkey_meth = {
+static const EVP_PKEY_METHOD dh_pkey_meth = {
EVP_PKEY_DH,
0,
pkey_dh_init,
pkey_dh_ctrl_str
};
-const EVP_PKEY_METHOD dhx_pkey_meth = {
+const EVP_PKEY_METHOD *ossl_dh_pkey_method(void)
+{
+ return &dh_pkey_meth;
+}
+
+static const EVP_PKEY_METHOD dhx_pkey_meth = {
EVP_PKEY_DHX,
0,
pkey_dh_init,
pkey_dh_ctrl,
pkey_dh_ctrl_str
};
+
+const EVP_PKEY_METHOD *ossl_dhx_pkey_method(void)
+{
+ return &dhx_pkey_meth;
+}
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