-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
*
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * 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 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 acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS 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 AUTHOR OR 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.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * 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 low level APIs are deprecated for public use, but still ok for
+ * internal use.
+ */
+#include "internal/deprecated.h"
+
#include <stdio.h>
-#include "internal/cryptlib.h"
#include <openssl/bn.h>
-#include "dh_locl.h"
#include <openssl/engine.h>
+#include <openssl/obj_mac.h>
+#include <openssl/core_names.h>
+#include "internal/cryptlib.h"
+#include "internal/refcount.h"
+#include "crypto/evp.h"
+#include "crypto/dh.h"
+#include "dh_local.h"
-static const DH_METHOD *default_DH_method = NULL;
-
-void DH_set_default_method(const DH_METHOD *meth)
-{
- default_DH_method = meth;
-}
-
-const DH_METHOD *DH_get_default_method(void)
-{
- if (!default_DH_method)
- default_DH_method = DH_OpenSSL();
- return default_DH_method;
-}
+static DH *dh_new_intern(ENGINE *engine, OPENSSL_CTX *libctx);
+#ifndef FIPS_MODULE
int DH_set_method(DH *dh, const DH_METHOD *meth)
{
/*
return 1;
}
+const DH_METHOD *dh_get_method(const DH *dh)
+{
+ return dh->meth;
+}
+
DH *DH_new(void)
{
- return DH_new_method(NULL);
+ return dh_new_intern(NULL, NULL);
}
DH *DH_new_method(ENGINE *engine)
+{
+ return dh_new_intern(engine, NULL);
+}
+#endif /* !FIPS_MODULE */
+
+DH *dh_new_with_libctx(OPENSSL_CTX *libctx)
+{
+ return dh_new_intern(NULL, libctx);
+}
+
+static DH *dh_new_intern(ENGINE *engine, OPENSSL_CTX *libctx)
{
DH *ret = OPENSSL_zalloc(sizeof(*ret));
if (ret == NULL) {
- DHerr(DH_F_DH_NEW_METHOD, ERR_R_MALLOC_FAILURE);
+ DHerr(0, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ ret->references = 1;
+ ret->lock = CRYPTO_THREAD_lock_new();
+ if (ret->lock == NULL) {
+ DHerr(0, ERR_R_MALLOC_FAILURE);
+ OPENSSL_free(ret);
return NULL;
}
+ ret->libctx = libctx;
ret->meth = DH_get_default_method();
-#ifndef OPENSSL_NO_ENGINE
+#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
+ ret->flags = ret->meth->flags; /* early default init */
if (engine) {
if (!ENGINE_init(engine)) {
- DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB);
- OPENSSL_free(ret);
- return NULL;
+ DHerr(0, ERR_R_ENGINE_LIB);
+ goto err;
}
ret->engine = engine;
} else
if (ret->engine) {
ret->meth = ENGINE_get_DH(ret->engine);
if (ret->meth == NULL) {
- DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB);
- ENGINE_finish(ret->engine);
- OPENSSL_free(ret);
- return NULL;
+ DHerr(0, ERR_R_ENGINE_LIB);
+ goto err;
}
}
#endif
- ret->references = 1;
ret->flags = ret->meth->flags;
- CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);
-
- ret->lock = CRYPTO_THREAD_lock_new();
- if (ret->lock == NULL) {
-#ifndef OPENSSL_NO_ENGINE
- ENGINE_finish(ret->engine);
-#endif
- CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);
- OPENSSL_free(ret);
- return NULL;
- }
+#ifndef FIPS_MODULE
+ if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data))
+ goto err;
+#endif /* FIPS_MODULE */
if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
- DH_free(ret);
- ret = NULL;
+ DHerr(0, ERR_R_INIT_FAIL);
+ goto err;
}
return ret;
+
+ err:
+ DH_free(ret);
+ return NULL;
}
void DH_free(DH *r)
if (r == NULL)
return;
- CRYPTO_atomic_add(&r->references, -1, &i, r->lock);
+ CRYPTO_DOWN_REF(&r->references, &i, r->lock);
REF_PRINT_COUNT("DH", r);
if (i > 0)
return;
REF_ASSERT_ISNT(i < 0);
- if (r->meth->finish)
+ if (r->meth != NULL && r->meth->finish != NULL)
r->meth->finish(r);
-#ifndef OPENSSL_NO_ENGINE
+#if !defined(FIPS_MODULE)
+# if !defined(OPENSSL_NO_ENGINE)
ENGINE_finish(r->engine);
-#endif
-
+# endif
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data);
+#endif
CRYPTO_THREAD_lock_free(r->lock);
- BN_clear_free(r->p);
- BN_clear_free(r->g);
- BN_clear_free(r->q);
- BN_clear_free(r->j);
- OPENSSL_free(r->seed);
- BN_clear_free(r->counter);
+ ffc_params_cleanup(&r->params);
BN_clear_free(r->pub_key);
BN_clear_free(r->priv_key);
OPENSSL_free(r);
{
int i;
- if (CRYPTO_atomic_add(&r->references, 1, &i, r->lock) <= 0)
+ if (CRYPTO_UP_REF(&r->references, &i, r->lock) <= 0)
return 0;
REF_PRINT_COUNT("DH", r);
return ((i > 1) ? 1 : 0);
}
+#ifndef FIPS_MODULE
int DH_set_ex_data(DH *d, int idx, void *arg)
{
- return (CRYPTO_set_ex_data(&d->ex_data, idx, arg));
+ return CRYPTO_set_ex_data(&d->ex_data, idx, arg);
}
-void *DH_get_ex_data(DH *d, int idx)
+void *DH_get_ex_data(const DH *d, int idx)
{
- return (CRYPTO_get_ex_data(&d->ex_data, idx));
+ return CRYPTO_get_ex_data(&d->ex_data, idx);
}
+#endif
int DH_bits(const DH *dh)
{
- return BN_num_bits(dh->p);
+ return BN_num_bits(dh->params.p);
}
int DH_size(const DH *dh)
{
- return (BN_num_bytes(dh->p));
+ return BN_num_bytes(dh->params.p);
}
int DH_security_bits(const DH *dh)
{
int N;
- if (dh->q)
- N = BN_num_bits(dh->q);
+ if (dh->params.q != NULL)
+ N = BN_num_bits(dh->params.q);
else if (dh->length)
N = dh->length;
else
N = -1;
- return BN_security_bits(BN_num_bits(dh->p), N);
+ return BN_security_bits(BN_num_bits(dh->params.p), N);
}
-
-void DH_get0_pqg(const DH *dh, BIGNUM **p, BIGNUM **q, BIGNUM **g)
+void DH_get0_pqg(const DH *dh,
+ const BIGNUM **p, const BIGNUM **q, const BIGNUM **g)
{
- if (p != NULL)
- *p = dh->p;
- if (q != NULL)
- *q = dh->q;
- if (g != NULL)
- *g = dh->g;
+ ffc_params_get0_pqg(&dh->params, p, q, g);
}
int DH_set0_pqg(DH *dh, BIGNUM *p, BIGNUM *q, BIGNUM *g)
{
- /* q is optional */
- if (p == NULL || g == NULL)
+ /*
+ * If the fields p and g in d are NULL, the corresponding input
+ * parameters MUST be non-NULL. q may remain NULL.
+ */
+ if ((dh->params.p == NULL && p == NULL)
+ || (dh->params.g == NULL && g == NULL))
return 0;
- BN_free(dh->p);
- BN_free(dh->q);
- BN_free(dh->g);
- dh->p = p;
- dh->q = q;
- dh->g = g;
-
- if (q != NULL) {
+
+ ffc_params_set0_pqg(&dh->params, p, q, g);
+ dh_cache_named_group(dh);
+ if (q != NULL)
dh->length = BN_num_bits(q);
+ /*
+ * Check if this is a named group. If it finds a named group then the
+ * 'q' and 'length' value are either already set or are set by the
+ * call.
+ */
+ if (DH_get_nid(dh) == NID_undef) {
+ /* If its not a named group then set the 'length' if q is not NULL */
+ if (q != NULL)
+ dh->length = BN_num_bits(q);
}
-
+ dh->dirty_cnt++;
return 1;
}
return 1;
}
-void DH_get0_key(const DH *dh, BIGNUM **pub_key, BIGNUM **priv_key)
+void DH_get0_key(const DH *dh, const BIGNUM **pub_key, const BIGNUM **priv_key)
{
if (pub_key != NULL)
*pub_key = dh->pub_key;
int DH_set0_key(DH *dh, BIGNUM *pub_key, BIGNUM *priv_key)
{
- /* Note that it is valid for priv_key to be NULL */
- if (pub_key == NULL)
- return 0;
-
- BN_free(dh->pub_key);
- BN_free(dh->priv_key);
- dh->pub_key = pub_key;
- dh->priv_key = priv_key;
+ if (pub_key != NULL) {
+ BN_clear_free(dh->pub_key);
+ dh->pub_key = pub_key;
+ }
+ if (priv_key != NULL) {
+ BN_clear_free(dh->priv_key);
+ dh->priv_key = priv_key;
+ dh->length = BN_num_bits(priv_key);
+ }
+ dh->dirty_cnt++;
return 1;
}
+const BIGNUM *DH_get0_p(const DH *dh)
+{
+ return dh->params.p;
+}
+
+const BIGNUM *DH_get0_q(const DH *dh)
+{
+ return dh->params.q;
+}
+
+const BIGNUM *DH_get0_g(const DH *dh)
+{
+ return dh->params.g;
+}
+
+const BIGNUM *DH_get0_priv_key(const DH *dh)
+{
+ return dh->priv_key;
+}
+
+const BIGNUM *DH_get0_pub_key(const DH *dh)
+{
+ return dh->pub_key;
+}
+
void DH_clear_flags(DH *dh, int flags)
{
dh->flags &= ~flags;
dh->flags |= flags;
}
+#ifndef FIPS_MODULE
ENGINE *DH_get0_engine(DH *dh)
{
return dh->engine;
}
+#endif /*FIPS_MODULE */
+
+FFC_PARAMS *dh_get0_params(DH *dh)
+{
+ return &dh->params;
+}
+int dh_get0_nid(const DH *dh)
+{
+ return dh->params.nid;
+}
+
+int dh_ffc_params_fromdata(DH *dh, const OSSL_PARAM params[])
+{
+ int ret;
+ FFC_PARAMS *ffc;
+
+ if (dh == NULL)
+ return 0;
+ ffc = dh_get0_params(dh);
+ if (ffc == NULL)
+ return 0;
+
+ ret = ffc_params_fromdata(ffc, params);
+ if (ret) {
+ dh_cache_named_group(dh);
+ dh->dirty_cnt++;
+ }
+ return ret;
+}
+
+static int dh_paramgen_check(EVP_PKEY_CTX *ctx)
+{
+ if (ctx == NULL || !EVP_PKEY_CTX_IS_GEN_OP(ctx)) {
+ ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
+ /* Uses the same return values as EVP_PKEY_CTX_ctrl */
+ return -2;
+ }
+ /* If key type not DH return error */
+ if (ctx->pmeth != NULL
+ && ctx->pmeth->pkey_id != EVP_PKEY_DH
+ && ctx->pmeth->pkey_id != EVP_PKEY_DHX)
+ return -1;
+ return 1;
+}
+
+int EVP_PKEY_CTX_set_dh_paramgen_gindex(EVP_PKEY_CTX *ctx, int gindex)
+{
+ int ret;
+ OSSL_PARAM params[2], *p = params;
+
+ if ((ret = dh_paramgen_check(ctx)) <= 0)
+ return ret;
+
+ *p++ = OSSL_PARAM_construct_int(OSSL_PKEY_PARAM_FFC_GINDEX, &gindex);
+ *p++ = OSSL_PARAM_construct_end();
+
+ return EVP_PKEY_CTX_set_params(ctx, params);
+}
+
+int EVP_PKEY_CTX_set_dh_paramgen_seed(EVP_PKEY_CTX *ctx,
+ const unsigned char *seed,
+ size_t seedlen)
+{
+ int ret;
+ OSSL_PARAM params[2], *p = params;
+
+ if ((ret = dh_paramgen_check(ctx)) <= 0)
+ return ret;
+
+ *p++ = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_FFC_SEED,
+ (void *)seed, seedlen);
+ *p++ = OSSL_PARAM_construct_end();
+
+ return EVP_PKEY_CTX_set_params(ctx, params);
+}
+
+int EVP_PKEY_CTX_set_dh_paramgen_type(EVP_PKEY_CTX *ctx, int typ)
+{
+ int ret;
+ OSSL_PARAM params[2], *p = params;
+ const char *name;
+
+ if ((ret = dh_paramgen_check(ctx)) <= 0)
+ return ret;
+
+#if !defined(FIPS_MODULE)
+ /* TODO(3.0): Remove this eventually when no more legacy */
+ if (ctx->op.keymgmt.genctx == NULL)
+ return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN,
+ EVP_PKEY_CTRL_DH_PARAMGEN_TYPE, typ, NULL);
+#endif
+
+ name = dh_gen_type_id2name(typ);
+ if (name == NULL)
+ return 0;
+ *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_FFC_TYPE,
+ (char *) name, 0);
+ *p++ = OSSL_PARAM_construct_end();
+
+ return EVP_PKEY_CTX_set_params(ctx, params);
+}
+
+int EVP_PKEY_CTX_set_dh_paramgen_prime_len(EVP_PKEY_CTX *ctx, int pbits)
+{
+ int ret;
+ OSSL_PARAM params[2], *p = params;
+ size_t bits = pbits;
+
+ if ((ret = dh_paramgen_check(ctx)) <= 0)
+ return ret;
+
+#if !defined(FIPS_MODULE)
+ /* TODO(3.0): Remove this eventually when no more legacy */
+ if (ctx->op.keymgmt.genctx == NULL)
+ return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN,
+ EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN, pbits,
+ NULL);
+#endif
+ *p++ = OSSL_PARAM_construct_size_t(OSSL_PKEY_PARAM_FFC_PBITS, &bits);
+ *p++ = OSSL_PARAM_construct_end();
+ return EVP_PKEY_CTX_set_params(ctx, params);
+}
+
+int EVP_PKEY_CTX_set_dh_paramgen_subprime_len(EVP_PKEY_CTX *ctx, int qbits)
+{
+ int ret;
+ OSSL_PARAM params[2], *p = params;
+ size_t bits2 = qbits;
+
+ if ((ret = dh_paramgen_check(ctx)) <= 0)
+ return ret;
+
+#if !defined(FIPS_MODULE)
+ /* TODO(3.0): Remove this eventually when no more legacy */
+ if (ctx->op.keymgmt.genctx == NULL)
+ return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN,
+ EVP_PKEY_CTRL_DH_PARAMGEN_SUBPRIME_LEN, qbits,
+ NULL);
+#endif
+ *p++ = OSSL_PARAM_construct_size_t(OSSL_PKEY_PARAM_FFC_QBITS, &bits2);
+ *p++ = OSSL_PARAM_construct_end();
+
+ return EVP_PKEY_CTX_set_params(ctx, params);
+}
+
+int EVP_PKEY_CTX_set_dh_paramgen_generator(EVP_PKEY_CTX *ctx, int gen)
+{
+ int ret;
+ OSSL_PARAM params[2], *p = params;
+
+ if ((ret = dh_paramgen_check(ctx)) <= 0)
+ return ret;
+
+#if !defined(FIPS_MODULE)
+ /* TODO(3.0): Remove this eventually when no more legacy */
+ if (ctx->op.keymgmt.genctx == NULL)
+ return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH, EVP_PKEY_OP_PARAMGEN,
+ EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR, gen, NULL);
+#endif
+
+ *p++ = OSSL_PARAM_construct_int(OSSL_PKEY_PARAM_DH_GENERATOR, &gen);
+ *p++ = OSSL_PARAM_construct_end();
+
+ return EVP_PKEY_CTX_set_params(ctx, params);
+}
+
+int EVP_PKEY_CTX_set_dh_rfc5114(EVP_PKEY_CTX *ctx, int gen)
+{
+ int ret;
+ OSSL_PARAM params[2], *p = params;
+ const char *name;
+
+ if ((ret = dh_paramgen_check(ctx)) <= 0)
+ return ret;
+
+#if !defined(FIPS_MODULE)
+ /* TODO(3.0): Remove this eventually when no more legacy */
+ if (ctx->op.keymgmt.genctx == NULL)
+ return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DHX, EVP_PKEY_OP_PARAMGEN,
+ EVP_PKEY_CTRL_DH_RFC5114, gen, NULL);
+#endif
+ name = ffc_named_group_from_uid(gen);
+ if (name == NULL)
+ return 0;
+
+ *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME,
+ (void *)name, 0);
+ *p++ = OSSL_PARAM_construct_end();
+ return EVP_PKEY_CTX_set_params(ctx, params);
+}
+
+int EVP_PKEY_CTX_set_dhx_rfc5114(EVP_PKEY_CTX *ctx, int gen)
+{
+ return EVP_PKEY_CTX_set_dh_rfc5114(ctx, gen);
+}
+
+int EVP_PKEY_CTX_set_dh_nid(EVP_PKEY_CTX *ctx, int nid)
+{
+ int ret;
+ OSSL_PARAM params[2], *p = params;
+ const char *name;
+
+ if ((ret = dh_paramgen_check(ctx)) <= 0)
+ return ret;
+
+#if !defined(FIPS_MODULE)
+ /* TODO(3.0): Remove this eventually when no more legacy */
+ if (ctx->op.keymgmt.genctx == NULL)
+ return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DH,
+ EVP_PKEY_OP_PARAMGEN | EVP_PKEY_OP_KEYGEN,
+ EVP_PKEY_CTRL_DH_NID, nid, NULL);
+#endif
+ name = ffc_named_group_from_uid(nid);
+ if (name == NULL)
+ return 0;
+
+ *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME,
+ (void *)name, 0);
+ *p++ = OSSL_PARAM_construct_end();
+ return EVP_PKEY_CTX_set_params(ctx, params);
+}
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