pigweed / third_party / github / ARMmbed / mbedtls / b491b2b051cde5357dd1e9d4caf0c1faf1aa573d / . / library / ecp_invasive.h

/** | |

* \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 */ |