我的 CRC64 校验和编码需要 CRC 反向代码 [英] I need CRC Reverse Code for my CRC64 Checksum Coding
本文介绍了我的 CRC64 校验和编码需要 CRC 反向代码的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
有人可以用 C# 编写 CRC64 反向算法吗?我无法编码，什么都看不懂.谢谢，
Can someone please code me the CRC64 Reverse Algorithm in C#? I am unable to code it, can't understand anything. Thanks,
我已从 C++ 复制了 CRC64 校验和代码并将其转换为 C# .NET.整个代码如下所示:
I have copied the CRC64 Checksum code from C++ and converted it into C# .NET. The entire code is displayed below:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace CRC64
{
public class cCRC64
{
public UInt64[] crc64_table = {
0x0000000000000000, 0x42F0E1EBA9EA3693,
0x85E1C3D753D46D26, 0xC711223CFA3E5BB5,
0x493366450E42ECDF, 0x0BC387AEA7A8DA4C,
0xCCD2A5925D9681F9, 0x8E224479F47CB76A,
0x9266CC8A1C85D9BE, 0xD0962D61B56FEF2D,
0x17870F5D4F51B498, 0x5577EEB6E6BB820B,
0xDB55AACF12C73561, 0x99A54B24BB2D03F2,
0x5EB4691841135847, 0x1C4488F3E8F96ED4,
0x663D78FF90E185EF, 0x24CD9914390BB37C,
0xE3DCBB28C335E8C9, 0xA12C5AC36ADFDE5A,
0x2F0E1EBA9EA36930, 0x6DFEFF5137495FA3,
0xAAEFDD6DCD770416, 0xE81F3C86649D3285,
0xF45BB4758C645C51, 0xB6AB559E258E6AC2,
0x71BA77A2DFB03177, 0x334A9649765A07E4,
0xBD68D2308226B08E, 0xFF9833DB2BCC861D,
0x388911E7D1F2DDA8, 0x7A79F00C7818EB3B,
0xCC7AF1FF21C30BDE, 0x8E8A101488293D4D,
0x499B3228721766F8, 0x0B6BD3C3DBFD506B,
0x854997BA2F81E701, 0xC7B97651866BD192,
0x00A8546D7C558A27, 0x4258B586D5BFBCB4,
0x5E1C3D753D46D260, 0x1CECDC9E94ACE4F3,
0xDBFDFEA26E92BF46, 0x990D1F49C77889D5,
0x172F5B3033043EBF, 0x55DFBADB9AEE082C,
0x92CE98E760D05399, 0xD03E790CC93A650A,
0xAA478900B1228E31, 0xE8B768EB18C8B8A2,
0x2FA64AD7E2F6E317, 0x6D56AB3C4B1CD584,
0xE374EF45BF6062EE, 0xA1840EAE168A547D,
0x66952C92ECB40FC8, 0x2465CD79455E395B,
0x3821458AADA7578F, 0x7AD1A461044D611C,
0xBDC0865DFE733AA9, 0xFF3067B657990C3A,
0x711223CFA3E5BB50, 0x33E2C2240A0F8DC3,
0xF4F3E018F031D676, 0xB60301F359DBE0E5,
0xDA050215EA6C212F, 0x98F5E3FE438617BC,
0x5FE4C1C2B9B84C09, 0x1D14202910527A9A,
0x93366450E42ECDF0, 0xD1C685BB4DC4FB63,
0x16D7A787B7FAA0D6, 0x5427466C1E109645,
0x4863CE9FF6E9F891, 0x0A932F745F03CE02,
0xCD820D48A53D95B7, 0x8F72ECA30CD7A324,
0x0150A8DAF8AB144E, 0x43A04931514122DD,
0x84B16B0DAB7F7968, 0xC6418AE602954FFB,
0xBC387AEA7A8DA4C0, 0xFEC89B01D3679253,
0x39D9B93D2959C9E6, 0x7B2958D680B3FF75,
0xF50B1CAF74CF481F, 0xB7FBFD44DD257E8C,
0x70EADF78271B2539, 0x321A3E938EF113AA,
0x2E5EB66066087D7E, 0x6CAE578BCFE24BED,
0xABBF75B735DC1058, 0xE94F945C9C3626CB,
0x676DD025684A91A1, 0x259D31CEC1A0A732,
0xE28C13F23B9EFC87, 0xA07CF2199274CA14,
0x167FF3EACBAF2AF1, 0x548F120162451C62,
0x939E303D987B47D7, 0xD16ED1D631917144,
0x5F4C95AFC5EDC62E, 0x1DBC74446C07F0BD,
0xDAAD56789639AB08, 0x985DB7933FD39D9B,
0x84193F60D72AF34F, 0xC6E9DE8B7EC0C5DC,
0x01F8FCB784FE9E69, 0x43081D5C2D14A8FA,
0xCD2A5925D9681F90, 0x8FDAB8CE70822903,
0x48CB9AF28ABC72B6, 0x0A3B7B1923564425,
0x70428B155B4EAF1E, 0x32B26AFEF2A4998D,
0xF5A348C2089AC238, 0xB753A929A170F4AB,
0x3971ED50550C43C1, 0x7B810CBBFCE67552,
0xBC902E8706D82EE7, 0xFE60CF6CAF321874,
0xE224479F47CB76A0, 0xA0D4A674EE214033,
0x67C58448141F1B86, 0x253565A3BDF52D15,
0xAB1721DA49899A7F, 0xE9E7C031E063ACEC,
0x2EF6E20D1A5DF759, 0x6C0603E6B3B7C1CA,
0xF6FAE5C07D3274CD, 0xB40A042BD4D8425E,
0x731B26172EE619EB, 0x31EBC7FC870C2F78,
0xBFC9838573709812, 0xFD39626EDA9AAE81,
0x3A28405220A4F534, 0x78D8A1B9894EC3A7,
0x649C294A61B7AD73, 0x266CC8A1C85D9BE0,
0xE17DEA9D3263C055, 0xA38D0B769B89F6C6,
0x2DAF4F0F6FF541AC, 0x6F5FAEE4C61F773F,
0xA84E8CD83C212C8A, 0xEABE6D3395CB1A19,
0x90C79D3FEDD3F122, 0xD2377CD44439C7B1,
0x15265EE8BE079C04, 0x57D6BF0317EDAA97,
0xD9F4FB7AE3911DFD, 0x9B041A914A7B2B6E,
0x5C1538ADB04570DB, 0x1EE5D94619AF4648,
0x02A151B5F156289C, 0x4051B05E58BC1E0F,
0x87409262A28245BA, 0xC5B073890B687329,
0x4B9237F0FF14C443, 0x0962D61B56FEF2D0,
0xCE73F427ACC0A965, 0x8C8315CC052A9FF6,
0x3A80143F5CF17F13, 0x7870F5D4F51B4980,
0xBF61D7E80F251235, 0xFD913603A6CF24A6,
0x73B3727A52B393CC, 0x31439391FB59A55F,
0xF652B1AD0167FEEA, 0xB4A25046A88DC879,
0xA8E6D8B54074A6AD, 0xEA16395EE99E903E,
0x2D071B6213A0CB8B, 0x6FF7FA89BA4AFD18,
0xE1D5BEF04E364A72, 0xA3255F1BE7DC7CE1,
0x64347D271DE22754, 0x26C49CCCB40811C7,
0x5CBD6CC0CC10FAFC, 0x1E4D8D2B65FACC6F,
0xD95CAF179FC497DA, 0x9BAC4EFC362EA149,
0x158E0A85C2521623, 0x577EEB6E6BB820B0,
0x906FC95291867B05, 0xD29F28B9386C4D96,
0xCEDBA04AD0952342, 0x8C2B41A1797F15D1,
0x4B3A639D83414E64, 0x09CA82762AAB78F7,
0x87E8C60FDED7CF9D, 0xC51827E4773DF90E,
0x020905D88D03A2BB, 0x40F9E43324E99428,
0x2CFFE7D5975E55E2, 0x6E0F063E3EB46371,
0xA91E2402C48A38C4, 0xEBEEC5E96D600E57,
0x65CC8190991CB93D, 0x273C607B30F68FAE,
0xE02D4247CAC8D41B, 0xA2DDA3AC6322E288,
0xBE992B5F8BDB8C5C, 0xFC69CAB42231BACF,
0x3B78E888D80FE17A, 0x7988096371E5D7E9,
0xF7AA4D1A85996083, 0xB55AACF12C735610,
0x724B8ECDD64D0DA5, 0x30BB6F267FA73B36,
0x4AC29F2A07BFD00D, 0x08327EC1AE55E69E,
0xCF235CFD546BBD2B, 0x8DD3BD16FD818BB8,
0x03F1F96F09FD3CD2, 0x41011884A0170A41,
0x86103AB85A2951F4, 0xC4E0DB53F3C36767,
0xD8A453A01B3A09B3, 0x9A54B24BB2D03F20,
0x5D45907748EE6495, 0x1FB5719CE1045206,
0x919735E51578E56C, 0xD367D40EBC92D3FF,
0x1476F63246AC884A, 0x568617D9EF46BED9,
0xE085162AB69D5E3C, 0xA275F7C11F7768AF,
0x6564D5FDE549331A, 0x279434164CA30589,
0xA9B6706FB8DFB2E3, 0xEB46918411358470,
0x2C57B3B8EB0BDFC5, 0x6EA7525342E1E956,
0x72E3DAA0AA188782, 0x30133B4B03F2B111,
0xF7021977F9CCEAA4, 0xB5F2F89C5026DC37,
0x3BD0BCE5A45A6B5D, 0x79205D0E0DB05DCE,
0xBE317F32F78E067B, 0xFCC19ED95E6430E8,
0x86B86ED5267CDBD3, 0xC4488F3E8F96ED40,
0x0359AD0275A8B6F5, 0x41A94CE9DC428066,
0xCF8B0890283E370C, 0x8D7BE97B81D4019F,
0x4A6ACB477BEA5A2A, 0x089A2AACD2006CB9,
0x14DEA25F3AF9026D, 0x562E43B4931334FE,
0x913F6188692D6F4B, 0xD3CF8063C0C759D8,
0x5DEDC41A34BBEEB2, 0x1F1D25F19D51D821,
0xD80C07CD676F8394, 0x9AFCE626CE85B507
};
/* Initialize a CRC accumulator */
public void Init_crc(ref UInt64 crc)
{
crc = 0xffffffffffffffff;
}
/* Finish a CRC calculation */
public void Fin_crc(ref UInt64 crc)
{
crc ^= 0xffffffffffffffff;
}
/* Accumulate some (more) bytes into a CRC */
public void Calc_crc(ref UInt64 crc, Byte[] pbData, uint len)
{
/* Constant table for CRC calculation */
uint __len = len;
uint pos = 0;
byte byteInput = 0;
while (__len-- > 0)
{
uint __tab_index = ((uint) (crc >> 56) ^ pbData[pos++]) & 0xFF;
crc = crc64_table[__tab_index] ^ (crc << 8);
}
}
}
}
等待帮助！
推荐答案
没有
散列算法是不可逆的.您无法取回原始数据，但您可以通过计算所有可能组合的散列值并与您拥有的散列值进行比较来获得特定长度的所有可能集.
Hashing algorithms are not reversible. You can't get back the original data, but you can get all possible sets of a specific length by calculating the hash for all possible combinations and compare to the hash that you have.
这当然是非常密集的计算.例如，只需十个字节即可为您提供 1 208 925 819 614 629 174 706 176 个组合来测试...
This is of course imensely calculation intensive. Just ten bytes for example gives you 1 208 925 819 614 629 174 706 176 combinations to test...
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