--- /dev/null
+/* Originally written by Bodo Moeller for the OpenSSL project.
+ * ====================================================================
+ * Copyright (c) 1998-2005 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
+ * 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+/* ====================================================================
+ * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
+ *
+ * Portions of the attached software ("Contribution") are developed by
+ * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
+ *
+ * The Contribution is licensed pursuant to the OpenSSL open source
+ * license provided above.
+ *
+ * The elliptic curve binary polynomial software is originally written by
+ * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems
+ * Laboratories. */
+
+#include <openssl/ec_key.h>
+
+#include <string.h>
+
+#include <openssl/ec.h>
+#include <openssl/ecdsa.h>
+#include <openssl/engine.h>
+#include <openssl/err.h>
+#include <openssl/ex_data.h>
+#include <openssl/mem.h>
+#include <openssl/thread.h>
+
+#include "internal.h"
+#include "../delocate.h"
+#include "../../internal.h"
+
+
+DEFINE_STATIC_EX_DATA_CLASS(g_ec_ex_data_class);
+
+static EC_WRAPPED_SCALAR *ec_wrapped_scalar_new(const EC_GROUP *group) {
+ EC_WRAPPED_SCALAR *wrapped = OPENSSL_malloc(sizeof(EC_WRAPPED_SCALAR));
+ if (wrapped == NULL) {
+ OPENSSL_PUT_ERROR(EC, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ OPENSSL_memset(wrapped, 0, sizeof(EC_WRAPPED_SCALAR));
+ wrapped->bignum.d = wrapped->scalar.words;
+ wrapped->bignum.width = group->order.width;
+ wrapped->bignum.dmax = group->order.width;
+ wrapped->bignum.flags = BN_FLG_STATIC_DATA;
+ return wrapped;
+}
+
+static void ec_wrapped_scalar_free(EC_WRAPPED_SCALAR *scalar) {
+ OPENSSL_free(scalar);
+}
+
+EC_KEY *EC_KEY_new(void) { return EC_KEY_new_method(NULL); }
+
+EC_KEY *EC_KEY_new_method(const ENGINE *engine) {
+ EC_KEY *ret = OPENSSL_malloc(sizeof(EC_KEY));
+ if (ret == NULL) {
+ OPENSSL_PUT_ERROR(EC, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ OPENSSL_memset(ret, 0, sizeof(EC_KEY));
+
+ if (engine) {
+ ret->ecdsa_meth = ENGINE_get_ECDSA_method(engine);
+ }
+ if (ret->ecdsa_meth) {
+ METHOD_ref(ret->ecdsa_meth);
+ }
+
+ ret->conv_form = POINT_CONVERSION_UNCOMPRESSED;
+ ret->references = 1;
+
+ CRYPTO_new_ex_data(&ret->ex_data);
+
+ if (ret->ecdsa_meth && ret->ecdsa_meth->init && !ret->ecdsa_meth->init(ret)) {
+ CRYPTO_free_ex_data(g_ec_ex_data_class_bss_get(), ret, &ret->ex_data);
+ if (ret->ecdsa_meth) {
+ METHOD_unref(ret->ecdsa_meth);
+ }
+ OPENSSL_free(ret);
+ return NULL;
+ }
+
+ return ret;
+}
+
+EC_KEY *EC_KEY_new_by_curve_name(int nid) {
+ EC_KEY *ret = EC_KEY_new();
+ if (ret == NULL) {
+ OPENSSL_PUT_ERROR(EC, ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+ ret->group = EC_GROUP_new_by_curve_name(nid);
+ if (ret->group == NULL) {
+ EC_KEY_free(ret);
+ return NULL;
+ }
+ return ret;
+}
+
+void EC_KEY_free(EC_KEY *r) {
+ if (r == NULL) {
+ return;
+ }
+
+ if (!CRYPTO_refcount_dec_and_test_zero(&r->references)) {
+ return;
+ }
+
+ if (r->ecdsa_meth) {
+ if (r->ecdsa_meth->finish) {
+ r->ecdsa_meth->finish(r);
+ }
+ METHOD_unref(r->ecdsa_meth);
+ }
+
+ EC_GROUP_free(r->group);
+ EC_POINT_free(r->pub_key);
+ ec_wrapped_scalar_free(r->priv_key);
+ BN_free(r->fixed_k);
+
+ CRYPTO_free_ex_data(g_ec_ex_data_class_bss_get(), r, &r->ex_data);
+
+ OPENSSL_free(r);
+}
+
+EC_KEY *EC_KEY_dup(const EC_KEY *src) {
+ if (src == NULL) {
+ OPENSSL_PUT_ERROR(EC, ERR_R_PASSED_NULL_PARAMETER);
+ return NULL;
+ }
+
+ EC_KEY *ret = EC_KEY_new();
+ if (ret == NULL) {
+ return NULL;
+ }
+
+ if ((src->group != NULL &&
+ !EC_KEY_set_group(ret, src->group)) ||
+ (src->pub_key != NULL &&
+ !EC_KEY_set_public_key(ret, src->pub_key)) ||
+ (src->priv_key != NULL &&
+ !EC_KEY_set_private_key(ret, EC_KEY_get0_private_key(src)))) {
+ EC_KEY_free(ret);
+ return NULL;
+ }
+
+ ret->enc_flag = src->enc_flag;
+ ret->conv_form = src->conv_form;
+ return ret;
+}
+
+int EC_KEY_up_ref(EC_KEY *r) {
+ CRYPTO_refcount_inc(&r->references);
+ return 1;
+}
+
+int EC_KEY_is_opaque(const EC_KEY *key) {
+ return key->ecdsa_meth && (key->ecdsa_meth->flags & ECDSA_FLAG_OPAQUE);
+}
+
+const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key) { return key->group; }
+
+int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group) {
+ // If |key| already has a group, it is an error to switch to another one.
+ if (key->group != NULL) {
+ if (EC_GROUP_cmp(key->group, group, NULL) != 0) {
+ OPENSSL_PUT_ERROR(EC, EC_R_GROUP_MISMATCH);
+ return 0;
+ }
+ return 1;
+ }
+
+ assert(key->priv_key == NULL);
+ assert(key->pub_key == NULL);
+
+ EC_GROUP_free(key->group);
+ key->group = EC_GROUP_dup(group);
+ return key->group != NULL;
+}
+
+const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key) {
+ return key->priv_key != NULL ? &key->priv_key->bignum : NULL;
+}
+
+int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *priv_key) {
+ if (key->group == NULL) {
+ OPENSSL_PUT_ERROR(EC, EC_R_MISSING_PARAMETERS);
+ return 0;
+ }
+
+ EC_WRAPPED_SCALAR *scalar = ec_wrapped_scalar_new(key->group);
+ if (scalar == NULL) {
+ return 0;
+ }
+ if (!ec_bignum_to_scalar(key->group, &scalar->scalar, priv_key)) {
+ OPENSSL_PUT_ERROR(EC, EC_R_WRONG_ORDER);
+ ec_wrapped_scalar_free(scalar);
+ return 0;
+ }
+ ec_wrapped_scalar_free(key->priv_key);
+ key->priv_key = scalar;
+ return 1;
+}
+
+const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key) {
+ return key->pub_key;
+}
+
+int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub_key) {
+ if (key->group == NULL) {
+ OPENSSL_PUT_ERROR(EC, EC_R_MISSING_PARAMETERS);
+ return 0;
+ }
+
+ if (EC_GROUP_cmp(key->group, pub_key->group, NULL) != 0) {
+ OPENSSL_PUT_ERROR(EC, EC_R_GROUP_MISMATCH);
+ return 0;
+ }
+
+ EC_POINT_free(key->pub_key);
+ key->pub_key = EC_POINT_dup(pub_key, key->group);
+ return (key->pub_key == NULL) ? 0 : 1;
+}
+
+unsigned int EC_KEY_get_enc_flags(const EC_KEY *key) { return key->enc_flag; }
+
+void EC_KEY_set_enc_flags(EC_KEY *key, unsigned int flags) {
+ key->enc_flag = flags;
+}
+
+point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key) {
+ return key->conv_form;
+}
+
+void EC_KEY_set_conv_form(EC_KEY *key, point_conversion_form_t cform) {
+ key->conv_form = cform;
+}
+
+int EC_KEY_check_key(const EC_KEY *eckey) {
+ int ok = 0;
+ BN_CTX *ctx = NULL;
+ EC_POINT *point = NULL;
+
+ if (!eckey || !eckey->group || !eckey->pub_key) {
+ OPENSSL_PUT_ERROR(EC, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+
+ if (EC_POINT_is_at_infinity(eckey->group, eckey->pub_key)) {
+ OPENSSL_PUT_ERROR(EC, EC_R_POINT_AT_INFINITY);
+ goto err;
+ }
+
+ ctx = BN_CTX_new();
+
+ if (ctx == NULL) {
+ goto err;
+ }
+
+ // testing whether the pub_key is on the elliptic curve
+ if (!EC_POINT_is_on_curve(eckey->group, eckey->pub_key, ctx)) {
+ OPENSSL_PUT_ERROR(EC, EC_R_POINT_IS_NOT_ON_CURVE);
+ goto err;
+ }
+ // in case the priv_key is present :
+ // check if generator * priv_key == pub_key
+ if (eckey->priv_key != NULL) {
+ point = EC_POINT_new(eckey->group);
+ if (point == NULL ||
+ !ec_point_mul_scalar(eckey->group, point, &eckey->priv_key->scalar,
+ NULL, NULL, ctx)) {
+ OPENSSL_PUT_ERROR(EC, ERR_R_EC_LIB);
+ goto err;
+ }
+ if (EC_POINT_cmp(eckey->group, point, eckey->pub_key, ctx) != 0) {
+ OPENSSL_PUT_ERROR(EC, EC_R_INVALID_PRIVATE_KEY);
+ goto err;
+ }
+ }
+ ok = 1;
+
+err:
+ BN_CTX_free(ctx);
+ EC_POINT_free(point);
+ return ok;
+}
+
+int EC_KEY_check_fips(const EC_KEY *key) {
+ if (EC_KEY_is_opaque(key)) {
+ // Opaque keys can't be checked.
+ OPENSSL_PUT_ERROR(EC, EC_R_PUBLIC_KEY_VALIDATION_FAILED);
+ return 0;
+ }
+
+ if (!EC_KEY_check_key(key)) {
+ return 0;
+ }
+
+ if (key->priv_key) {
+ uint8_t data[16] = {0};
+ ECDSA_SIG *sig = ECDSA_do_sign(data, sizeof(data), key);
+#if defined(BORINGSSL_FIPS_BREAK_ECDSA_PWCT)
+ data[0] = ~data[0];
+#endif
+ int ok = sig != NULL &&
+ ECDSA_do_verify(data, sizeof(data), sig, key);
+ ECDSA_SIG_free(sig);
+ if (!ok) {
+ OPENSSL_PUT_ERROR(EC, EC_R_PUBLIC_KEY_VALIDATION_FAILED);
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x,
+ BIGNUM *y) {
+ EC_POINT *point = NULL;
+ int ok = 0;
+
+ if (!key || !key->group || !x || !y) {
+ OPENSSL_PUT_ERROR(EC, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+
+ point = EC_POINT_new(key->group);
+ if (point == NULL ||
+ !EC_POINT_set_affine_coordinates_GFp(key->group, point, x, y, NULL) ||
+ !EC_KEY_set_public_key(key, point) ||
+ !EC_KEY_check_key(key)) {
+ goto err;
+ }
+
+ ok = 1;
+
+err:
+ EC_POINT_free(point);
+ return ok;
+}
+
+int EC_KEY_generate_key(EC_KEY *key) {
+ if (key == NULL || key->group == NULL) {
+ OPENSSL_PUT_ERROR(EC, ERR_R_PASSED_NULL_PARAMETER);
+ return 0;
+ }
+
+ // Check that the group order is FIPS compliant (FIPS 186-4 B.4.2).
+ if (BN_num_bits(EC_GROUP_get0_order(key->group)) < 160) {
+ OPENSSL_PUT_ERROR(EC, EC_R_INVALID_GROUP_ORDER);
+ return 0;
+ }
+
+ static const uint8_t kDefaultAdditionalData[32] = {0};
+ EC_WRAPPED_SCALAR *priv_key = ec_wrapped_scalar_new(key->group);
+ EC_POINT *pub_key = EC_POINT_new(key->group);
+ if (priv_key == NULL || pub_key == NULL ||
+ // Generate the private key by testing candidates (FIPS 186-4 B.4.2).
+ !ec_random_nonzero_scalar(key->group, &priv_key->scalar,
+ kDefaultAdditionalData) ||
+ !ec_point_mul_scalar(key->group, pub_key, &priv_key->scalar, NULL, NULL,
+ NULL)) {
+ EC_POINT_free(pub_key);
+ ec_wrapped_scalar_free(priv_key);
+ return 0;
+ }
+
+ ec_wrapped_scalar_free(key->priv_key);
+ key->priv_key = priv_key;
+ EC_POINT_free(key->pub_key);
+ key->pub_key = pub_key;
+ return 1;
+}
+
+int EC_KEY_generate_key_fips(EC_KEY *eckey) {
+ return EC_KEY_generate_key(eckey) && EC_KEY_check_fips(eckey);
+}
+
+int EC_KEY_get_ex_new_index(long argl, void *argp, CRYPTO_EX_unused *unused,
+ CRYPTO_EX_dup *dup_unused,
+ CRYPTO_EX_free *free_func) {
+ int index;
+ if (!CRYPTO_get_ex_new_index(g_ec_ex_data_class_bss_get(), &index, argl, argp,
+ free_func)) {
+ return -1;
+ }
+ return index;
+}
+
+int EC_KEY_set_ex_data(EC_KEY *d, int idx, void *arg) {
+ return CRYPTO_set_ex_data(&d->ex_data, idx, arg);
+}
+
+void *EC_KEY_get_ex_data(const EC_KEY *d, int idx) {
+ return CRYPTO_get_ex_data(&d->ex_data, idx);
+}
+
+void EC_KEY_set_asn1_flag(EC_KEY *key, int flag) {}
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