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+/**
+ * \file ecp_invasive.h
+ *
+ * \brief ECP module: interfaces for invasive testing only.
+ *
+ * The interfaces in this file are intended for testing purposes only.
+ * They SHOULD NOT be made available in library integrations except when
+ * building the library for testing.
+ */
+/*
+ * Copyright The Mbed TLS Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MBEDTLS_ECP_INVASIVE_H
+#define MBEDTLS_ECP_INVASIVE_H
+
+#include "common.h"
+#include "mbedtls/bignum.h"
+#include "mbedtls/ecp.h"
+
+#if defined(MBEDTLS_TEST_HOOKS) && defined(MBEDTLS_ECP_C)
+
+#if defined(MBEDTLS_ECP_DP_SECP224R1_ENABLED) || \
+ defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED) || \
+ defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED)
+/* Preconditions:
+ * - bits is a multiple of 64 or is 224
+ * - c is -1 or -2
+ * - 0 <= N < 2^bits
+ * - N has room for bits plus one limb
+ *
+ * Behavior:
+ * Set N to c * 2^bits + old_value_of_N.
+ */
+void mbedtls_ecp_fix_negative( mbedtls_mpi *N, signed char c, size_t bits );
+#endif
+
+#if defined(MBEDTLS_ECP_MONTGOMERY_ENABLED)
+/** Generate a private key on a Montgomery curve (Curve25519 or Curve448).
+ *
+ * This function implements key generation for the set of secret keys
+ * specified in [Curve25519] p. 5 and in [Curve448]. The resulting value
+ * has the lower bits masked but is not necessarily canonical.
+ *
+ * \note - [Curve25519] http://cr.yp.to/ecdh/curve25519-20060209.pdf
+ * - [RFC7748] https://tools.ietf.org/html/rfc7748
+ *
+ * \p high_bit The position of the high-order bit of the key to generate.
+ * This is the bit-size of the key minus 1:
+ * 254 for Curve25519 or 447 for Curve448.
+ * \param d The randomly generated key. This is a number of size
+ * exactly \p n_bits + 1 bits, with the least significant bits
+ * masked as specified in [Curve25519] and in [RFC7748] ยง5.
+ * \param f_rng The RNG function.
+ * \param p_rng The RNG context to be passed to \p f_rng.
+ *
+ * \return \c 0 on success.
+ * \return \c MBEDTLS_ERR_ECP_xxx or MBEDTLS_ERR_MPI_xxx on failure.
+ */
+int mbedtls_ecp_gen_privkey_mx( size_t n_bits,
+ mbedtls_mpi *d,
+ int (*f_rng)(void *, unsigned char *, size_t),
+ void *p_rng );
+
+#endif /* MBEDTLS_ECP_MONTGOMERY_ENABLED */
+
+#endif /* MBEDTLS_TEST_HOOKS && MBEDTLS_ECP_C */
+
+#endif /* MBEDTLS_ECP_INVASIVE_H */