1 /*############################################################################ 2 # Copyright 2016-2017 Intel Corporation 3 # 4 # Licensed under the Apache License, Version 2.0 (the "License"); 5 # you may not use this file except in compliance with the License. 6 # You may obtain a copy of the License at 7 # 8 # http://www.apache.org/licenses/LICENSE-2.0 9 # 10 # Unless required by applicable law or agreed to in writing, software 11 # distributed under the License is distributed on an "AS IS" BASIS, 12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 # See the License for the specific language governing permissions and 14 # limitations under the License. 15 ############################################################################*/ 16 17 /*! 18 * \file 19 * \brief Big number private interface. 20 */ 21 22 #ifndef EPID_COMMON_MATH_SRC_BIGNUM_INTERNAL_H_ 23 #define EPID_COMMON_MATH_SRC_BIGNUM_INTERNAL_H_ 24 25 #include "epid/common/errors.h" 26 #include "epid/common/stdtypes.h" 27 #include "epid/common/types.h" 28 #include "ext/ipp/include/ippcp.h" 29 30 typedef void* BNU; 31 typedef void const* ConstBNU; 32 typedef Ipp32u* IppBNU; 33 typedef Ipp32u const* ConstIppBNU; 34 typedef Ipp8u* IppOctStr; 35 typedef Ipp8u const* ConstIppOctStr; 36 37 /// Big Number 38 struct BigNum { 39 /// Internal implementation of bignum 40 IppsBigNumState* ipp_bn; 41 }; 42 43 /// convert octet string into "big number unsigned" representation 44 /*! 45 46 This is an internal function, used to convert an octet string (uint8_t 47 array) into a big number unsigned representation (uint32_t array). 48 For example, octet string {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 49 0x08} is converted to {0x05060708, 0x01020304} 50 51 \param[out] bnu_ptr 52 Output big number unsigned array 53 \param[in] octstr_ptr 54 Input octal string 55 \param[in] octstr_len 56 Length of octet string, should be multiple of 4 57 58 \returns length of big number unsigned in uint32_t chunks 59 \returns -1 in case of any error 60 */ 61 int OctStr2Bnu(BNU bnu_ptr, ConstOctStr octstr_ptr, int octstr_len); 62 63 /// Get octet string size in bits 64 /*! 65 \param[in] octstr_ptr 66 Input octet string. 67 \param[in] octstr_len 68 Length of octet string in bytes. 69 70 \returns bit size of big number value from octet string 71 */ 72 size_t OctStrBitSize(ConstOctStr octstr_ptr, size_t octstr_len); 73 74 #endif // EPID_COMMON_MATH_SRC_BIGNUM_INTERNAL_H_ 75
