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mbedtls/library/ecp_invasive.h
Minos Galanakis 9d80879f90 ecp_curves: Introduced mbedtls_ecp_mod_p224k1() 
This patch introduces a `MBEDTLS_STATIC_TESTABLE` helper
method which exposes `ecp_mod_p256k1()` to the test-framework

Signed-off-by: Minos Galanakis <minos.galanakis@arm.com>
2023-04-18 14:13:20 +01:00

213 lines
8.5 KiB
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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 "bignum_mod.h"
#include "mbedtls/ecp.h"
#if defined(MBEDTLS_TEST_HOOKS) && defined(MBEDTLS_ECP_LIGHT)
#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] §5.
* \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 */
#if defined(MBEDTLS_ECP_DP_SECP192R1_ENABLED)
/** Fast quasi-reduction modulo p192 (FIPS 186-3 D.2.1)
*
* This operation expects a 384 bit MPI and the result of the reduction
* is a 192 bit MPI.
*
* \param[in,out] Np The address of the MPI to be converted.
* Must have twice as many limbs as the modulus.
* Upon return this holds the reduced value. The bitlength
* of the reduced value is the same as that of the modulus
* (192 bits).
* \param[in] Nn The length of \p Np in limbs.
*/
MBEDTLS_STATIC_TESTABLE
int mbedtls_ecp_mod_p192_raw(mbedtls_mpi_uint *Np, size_t Nn);
#endif /* MBEDTLS_ECP_DP_SECP192R1_ENABLED */
#if defined(MBEDTLS_ECP_DP_SECP224R1_ENABLED)
/** Fast quasi-reduction modulo p224 (FIPS 186-3 D.2.2)
*
* \param[in,out] X The address of the MPI to be converted.
* Must have exact limb size that stores a 448-bit MPI
* (double the bitlength of the modulus).
* Upon return holds the reduced value which is
* in range `0 <= X < 2 * N` (where N is the modulus).
* The bitlength of the reduced value is the same as
* that of the modulus (224 bits).
* \param[in] X_limbs The length of \p X in limbs.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if \p X_limbs is not the
* limb size that sores a 448-bit MPI.
*/
MBEDTLS_STATIC_TESTABLE
int mbedtls_ecp_mod_p224_raw(mbedtls_mpi_uint *X, size_t X_limbs);
#endif /* MBEDTLS_ECP_DP_SECP224R1_ENABLED */
#if defined(MBEDTLS_ECP_DP_SECP256R1_ENABLED)
/** Fast quasi-reduction modulo p256 (FIPS 186-3 D.2.3)
*
* \param[in,out] X The address of the MPI to be converted.
* Must have exact limb size that stores a 512-bit MPI
* (double the bitlength of the modulus).
* Upon return holds the reduced value which is
* in range `0 <= X < 2 * N` (where N is the modulus).
* The bitlength of the reduced value is the same as
* that of the modulus (256 bits).
* \param[in] X_limbs The length of \p X in limbs.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if \p X_limbs is not the
* limb size that sores a 512-bit MPI.
*/
MBEDTLS_STATIC_TESTABLE
int mbedtls_ecp_mod_p256_raw(mbedtls_mpi_uint *X, size_t X_limbs);
#endif
#if defined(MBEDTLS_ECP_DP_SECP521R1_ENABLED)
/** Fast quasi-reduction modulo p521 = 2^521 - 1 (FIPS 186-3 D.2.5)
*
* \param[in,out] X The address of the MPI to be converted.
* Must have twice as many limbs as the modulus
* (the modulus is 521 bits long). Upon return this
* holds the reduced value. The reduced value is
* in range `0 <= X < 2 * N` (where N is the modulus).
* and its the bitlength is one plus the bitlength
* of the modulus.
* \param[in] X_limbs The length of \p X in limbs.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if \p X_limbs does not have
* twice as many limbs as the modulus.
*/
MBEDTLS_STATIC_TESTABLE
int mbedtls_ecp_mod_p521_raw(mbedtls_mpi_uint *X, size_t X_limbs);
#endif /* MBEDTLS_ECP_DP_SECP521R1_ENABLED */
#if defined(MBEDTLS_ECP_DP_SECP384R1_ENABLED)
/** Fast quasi-reduction modulo p384 (FIPS 186-3 D.2.4)
*
* \param[in,out] X The address of the MPI to be converted.
* Must have exact limb size that stores a 768-bit MPI
* (double the bitlength of the modulus).
* Upon return holds the reduced value which is
* in range `0 <= X < 2 * N` (where N is the modulus).
* The bitlength of the reduced value is the same as
* that of the modulus (384 bits).
* \param[in] X_limbs The length of \p N in limbs.
*
* \return \c 0 on success.
* \return #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if \p N_n does not have
* twice as many limbs as the modulus.
*/
MBEDTLS_STATIC_TESTABLE
int mbedtls_ecp_mod_p384_raw(mbedtls_mpi_uint *X, size_t X_limbs);
#endif /* MBEDTLS_ECP_DP_SECP384R1_ENABLED */
#if defined(MBEDTLS_ECP_DP_SECP192K1_ENABLED)
/*
* Fast quasi-reduction modulo p192k1 = 2^192 - R,
* with R = 2^32 + 2^12 + 2^8 + 2^7 + 2^6 + 2^3 + 1 = 0x0100001119
*/
MBEDTLS_STATIC_TESTABLE
int mbedtls_ecp_mod_p192k1(mbedtls_mpi *N);
#endif /* MBEDTLS_ECP_DP_SECP192K1_ENABLED */
#if defined(MBEDTLS_ECP_DP_SECP224K1_ENABLED)
MBEDTLS_STATIC_TESTABLE
int mbedtls_ecp_mod_p224k1(mbedtls_mpi *N);
#endif /* MBEDTLS_ECP_DP_SECP224K1_ENABLED */
/** Initialise a modulus with hard-coded const curve data.
*
* \note The caller is responsible for the \p N modulus' memory.
* mbedtls_mpi_mod_modulus_free(&N) should be invoked at the
* end of its lifecycle.
*
* \param[in,out] N The address of the modulus structure to populate.
* Must be initialized.
* \param[in] id The mbedtls_ecp_group_id for which to initialise the modulus.
* \param[in] ctype The mbedtls_ecp_curve_type identifier for a coordinate modulus (P)
* or a scalar modulus (N).
*
* \return \c 0 if successful.
* \return #MBEDTLS_ERR_ECP_BAD_INPUT_DATA if the given MPIs do not
* have the correct number of limbs.
*
*/
MBEDTLS_STATIC_TESTABLE
int mbedtls_ecp_modulus_setup(mbedtls_mpi_mod_modulus *N,
const mbedtls_ecp_group_id id,
const mbedtls_ecp_curve_type ctype);
#endif /* MBEDTLS_TEST_HOOKS && MBEDTLS_ECP_C */
#endif /* MBEDTLS_ECP_INVASIVE_H */
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