pigweed / third_party / github / ARMmbed / mbedtls / c2a938711085813eae11d99550b280c416a8242e / . / library / bignum_internal.h

/** | |

* Internal bignum functions | |

* | |

* 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_BIGNUM_INTERNAL_H | |

#define MBEDTLS_BIGNUM_INTERNAL_H | |

#include "common.h" | |

#if defined(MBEDTLS_BIGNUM_C) | |

#include "mbedtls/bignum.h" | |

#endif | |

/** Perform a known-size multiply accumulate operation | |

* | |

* Add \p b * \p s to \p d. | |

* | |

* \param[in,out] d The pointer to the (little-endian) array | |

* representing the bignum to accumulate onto. | |

* \param d_len The number of limbs of \p d. This must be | |

* at least \p s_len. | |

* \param[in] s The pointer to the (little-endian) array | |

* representing the bignum to multiply with. | |

* This may be the same as \p d. Otherwise, | |

* it must be disjoint from \p d. | |

* \param s_len The number of limbs of \p s. | |

* \param b A scalar to multiply with. | |

* | |

* \return c The carry at the end of the operation. | |

*/ | |

mbedtls_mpi_uint mbedtls_mpi_core_mla( mbedtls_mpi_uint *d, size_t d_len , | |

const mbedtls_mpi_uint *s, size_t s_len, | |

mbedtls_mpi_uint b ); | |

#endif /* MBEDTLS_BIGNUM_INTERNAL_H */ |