description
This patch converts the C tool of calculating the crc32 value of file into
a python file. To realize this,after reading the data into the file in
binary form from an original file,a lookup table is listed to do XOR and
shifting calculation for each bit in the file.The 32-bit result is placed
at the beginning of the file as the header.The verification part will
recalculate the crc32 value of the data behind the header again.When header
is equal to the recalculating result,which means the crc32 value of this file
is correct and the file is valid.In the unit testing part,some files which
have been preprocessed by C tool are placed in a folder.The file after
processing
by python tool will be compared with these files to check whether the result is
correct.
Cc: Bob Feng <bob.c.f...@intel.com>
Cc: Liming Gao <gaolim...@byosoft.com.cn>
Signed-off-by: Yuwei Chen <yuwei.c...@intel.com>
---
edk2basetools/GenCrc32/GenCrc32.py | 262
++--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1 file changed, 2 insertions(+), 260 deletions(-)
diff --git a/edk2basetools/GenCrc32/GenCrc32.py
b/edk2basetools/GenCrc32/GenCrc32.py
index e27e4b0..982d2e7 100644
--- a/edk2basetools/GenCrc32/GenCrc32.py
+++ b/edk2basetools/GenCrc32/GenCrc32.py
@@ -14,263 +14,8 @@
import argparse
import os
import sys
+from binascii import crc32
-mCrcTable=[0x00000000,
- 0x77073096,
- 0xEE0E612C,
- 0x990951BA,
- 0x076DC419,
- 0x706AF48F,
- 0xE963A535,
- 0x9E6495A3,
- 0x0EDB8832,
- 0x79DCB8A4,
- 0xE0D5E91E,
- 0x97D2D988,
- 0x09B64C2B,
- 0x7EB17CBD,
- 0xE7B82D07,
- 0x90BF1D91,
- 0x1DB71064,
- 0x6AB020F2,
- 0xF3B97148,
- 0x84BE41DE,
- 0x1ADAD47D,
- 0x6DDDE4EB,
- 0xF4D4B551,
- 0x83D385C7,
- 0x136C9856,
- 0x646BA8C0,
- 0xFD62F97A,
- 0x8A65C9EC,
- 0x14015C4F,
- 0x63066CD9,
- 0xFA0F3D63,
- 0x8D080DF5,
- 0x3B6E20C8,
- 0x4C69105E,
- 0xD56041E4,
- 0xA2677172,
- 0x3C03E4D1,
- 0x4B04D447,
- 0xD20D85FD,
- 0xA50AB56B,
- 0x35B5A8FA,
- 0x42B2986C,
- 0xDBBBC9D6,
- 0xACBCF940,
- 0x32D86CE3,
- 0x45DF5C75,
- 0xDCD60DCF,
- 0xABD13D59,
- 0x26D930AC,
- 0x51DE003A,
- 0xC8D75180,
- 0xBFD06116,
- 0x21B4F4B5,
- 0x56B3C423,
- 0xCFBA9599,
- 0xB8BDA50F,
- 0x2802B89E,
- 0x5F058808,
- 0xC60CD9B2,
- 0xB10BE924,
- 0x2F6F7C87,
- 0x58684C11,
- 0xC1611DAB,
- 0xB6662D3D,
- 0x76DC4190,
- 0x01DB7106,
- 0x98D220BC,
- 0xEFD5102A,
- 0x71B18589,
- 0x06B6B51F,
- 0x9FBFE4A5,
- 0xE8B8D433,
- 0x7807C9A2,
- 0x0F00F934,
- 0x9609A88E,
- 0xE10E9818,
- 0x7F6A0DBB,
- 0x086D3D2D,
- 0x91646C97,
- 0xE6635C01,
- 0x6B6B51F4,
- 0x1C6C6162,
- 0x856530D8,
- 0xF262004E,
- 0x6C0695ED,
- 0x1B01A57B,
- 0x8208F4C1,
- 0xF50FC457,
- 0x65B0D9C6,
- 0x12B7E950,
- 0x8BBEB8EA,
- 0xFCB9887C,
- 0x62DD1DDF,
- 0x15DA2D49,
- 0x8CD37CF3,
- 0xFBD44C65,
- 0x4DB26158,
- 0x3AB551CE,
- 0xA3BC0074,
- 0xD4BB30E2,
- 0x4ADFA541,
- 0x3DD895D7,
- 0xA4D1C46D,
- 0xD3D6F4FB,
- 0x4369E96A,
- 0x346ED9FC,
- 0xAD678846,
- 0xDA60B8D0,
- 0x44042D73,
- 0x33031DE5,
- 0xAA0A4C5F,
- 0xDD0D7CC9,
- 0x5005713C,
- 0x270241AA,
- 0xBE0B1010,
- 0xC90C2086,
- 0x5768B525,
- 0x206F85B3,
- 0xB966D409,
- 0xCE61E49F,
- 0x5EDEF90E,
- 0x29D9C998,
- 0xB0D09822,
- 0xC7D7A8B4,
- 0x59B33D17,
- 0x2EB40D81,
- 0xB7BD5C3B,
- 0xC0BA6CAD,
- 0xEDB88320,
- 0x9ABFB3B6,
- 0x03B6E20C,
- 0x74B1D29A,
- 0xEAD54739,
- 0x9DD277AF,
- 0x04DB2615,
- 0x73DC1683,
- 0xE3630B12,
- 0x94643B84,
- 0x0D6D6A3E,
- 0x7A6A5AA8,
- 0xE40ECF0B,
- 0x9309FF9D,
- 0x0A00AE27,
- 0x7D079EB1,
- 0xF00F9344,
- 0x8708A3D2,
- 0x1E01F268,
- 0x6906C2FE,
- 0xF762575D,
- 0x806567CB,
- 0x196C3671,
- 0x6E6B06E7,
- 0xFED41B76,
- 0x89D32BE0,
- 0x10DA7A5A,
- 0x67DD4ACC,
- 0xF9B9DF6F,
- 0x8EBEEFF9,
- 0x17B7BE43,
- 0x60B08ED5,
- 0xD6D6A3E8,
- 0xA1D1937E,
- 0x38D8C2C4,
- 0x4FDFF252,
- 0xD1BB67F1,
- 0xA6BC5767,
- 0x3FB506DD,
- 0x48B2364B,
- 0xD80D2BDA,
- 0xAF0A1B4C,
- 0x36034AF6,
- 0x41047A60,
- 0xDF60EFC3,
- 0xA867DF55,
- 0x316E8EEF,
- 0x4669BE79,
- 0xCB61B38C,
- 0xBC66831A,
- 0x256FD2A0,
- 0x5268E236,
- 0xCC0C7795,
- 0xBB0B4703,
- 0x220216B9,
- 0x5505262F,
- 0xC5BA3BBE,
- 0xB2BD0B28,
- 0x2BB45A92,
- 0x5CB36A04,
- 0xC2D7FFA7,
- 0xB5D0CF31,
- 0x2CD99E8B,
- 0x5BDEAE1D,
- 0x9B64C2B0,
- 0xEC63F226,
- 0x756AA39C,
- 0x026D930A,
- 0x9C0906A9,
- 0xEB0E363F,
- 0x72076785,
- 0x05005713,
- 0x95BF4A82,
- 0xE2B87A14,
- 0x7BB12BAE,
- 0x0CB61B38,
- 0x92D28E9B,
- 0xE5D5BE0D,
- 0x7CDCEFB7,
- 0x0BDBDF21,
- 0x86D3D2D4,
- 0xF1D4E242,
- 0x68DDB3F8,
- 0x1FDA836E,
- 0x81BE16CD,
- 0xF6B9265B,
- 0x6FB077E1,
- 0x18B74777,
- 0x88085AE6,
- 0xFF0F6A70,
- 0x66063BCA,
- 0x11010B5C,
- 0x8F659EFF,
- 0xF862AE69,
- 0x616BFFD3,
- 0x166CCF45,
- 0xA00AE278,
- 0xD70DD2EE,
- 0x4E048354,
- 0x3903B3C2,
- 0xA7672661,
- 0xD06016F7,
- 0x4969474D,
- 0x3E6E77DB,
- 0xAED16A4A,
- 0xD9D65ADC,
- 0x40DF0B66,
- 0x37D83BF0,
- 0xA9BCAE53,
- 0xDEBB9EC5,
- 0x47B2CF7F,
- 0x30B5FFE9,
- 0xBDBDF21C,
- 0xCABAC28A,
- 0x53B39330,
- 0x24B4A3A6,
- 0xBAD03605,
- 0xCDD70693,
- 0x54DE5729,
- 0x23D967BF,
- 0xB3667A2E,
- 0xC4614AB8,
- 0x5D681B02,
- 0x2A6F2B94,
- 0xB40BBE37,
- 0xC30C8EA1,
- 0x5A05DF1B,
- 0x2D02EF8D]
parser=argparse.ArgumentParser(description='''
@@ -307,10 +52,7 @@ def CalculateCrc32(inputfile:str, outputfile:str,
filebytes=b''):
with open(inputfile,'rb') as fin:
temp=fin.read()
- DataSize = len(temp)
- for Index in range(DataSize):
- Crc=(Crc>>8)^mCrcTable[(Crc&0xff)^temp[Index]]
- CrcOut=Crc^0xffffffff
+ CrcOut = crc32(temp)
CrcOut=CrcOut.to_bytes(4,byteorder="little")
with open(outputfile,'wb') as fout:
if status==0:
--
2.37.0.windows.1
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