使用python指紋打印塊

Question

我正在嘗試將文件分塊併爲這些塊創建SHA1指紋。以下是代碼。當我從python命令提示符生成指紋時，我的文件只有一行「測試」，我得到了不同的答案。

>>> m = hashlib.sha1() 
>>> m.update("tests") 
>>> m.digest() 
'\x04\xd1?\xd0\xaao\x01\x97\xcf,\x99\x90\x19\xa6\x07\xc3l\x81\xeb\x9f' 
>>> 
>>> m.hexdigest() 
'04d13fd0aa6f0197cf2c999019a607c36c81eb9f' 
------------------------------------------------------------- 

    import sys, os,hashlib 
    kilobytes = 1024 
    megabytes = kilobytes * 1000 
    chunksize = int(1.4 * megabytes)     # default: roughly a floppy 
    hash = hashlib.sha1() 
    def split(fromfile, todir, chunksize=chunksize): 
     if not os.path.exists(todir):     # caller handles errors 
      os.mkdir(todir)       # make dir, read/write parts 
     else: 
      print " path exists" 
      ##for fname in os.listdir(todir):   # delete any existing files 
      ## os.remove(os.path.join(todir, fname)) 
     partnum = 0 
     input = open(fromfile, 'rb')     # use binary mode on Windows 
     while 1:          # eof=empty string from read 
      chunk = input.read(chunksize)    # get next part <= chunksize 
      print "chunk=",chunk,"\n" 
      if not chunk: break 
      partnum = partnum+1 
      filename = os.path.join(todir, ('hashpart%04d' % partnum)) 
      fileobj = open(filename, 'wb') 
      print "chunk before hashin is =",chunk, "of type ",type(chunk) 
      hash.update(chunk) 
      print "finger print is ",hash.hexdigest() 
      fileobj.write(hash.digest()) 
      fileobj.close() 
     input.close() 
     assert partnum <= 9999       # join sort fails if 5 digits 
     return partnum 

----------------------------------------------------------- 

but with the code written above it gives me 

chunk before hashin is = tests 
of type <type 'str'> 
finger print is 64853233b4bd86fc53565e1383f2b19b6ede2995 

Can someone help me? 

Answer 1

您的文件是「tests \ n」。這就是爲什麼您的打印聲明跨越多行。添加新行，你會得到正確的散列。

>>> m.update("tests\n") 
>>> m.hexdigest() 
'64853233b4bd86fc53565e1383f2b19b6ede2995'