| 0,0 → 1,73 |
|---|
| """ binascii_plus |
| |
| Enhanced hex packet input and display |
| |
| Copyright © (c) 2002 by Paul A. Lambert |
| Read LICENSE.txt for license information. |
| """ |
| from binascii import a2b_hex, b2a_hex |
| import string |
| |
| viewable = string.letters+string.digits+string.punctuation+' ' |
| |
| def a2b_p(s): |
| """ Convert ascii string of hex bytes to a binary string |
| this conversion allows any type of white space""" |
| s= ''.join(string.split(s)) |
| return a2b_hex(s) |
| |
| #--------------- |
| |
| def b2a(bString, separator=' '): |
| """ Simple conversion of binary string to |
| hex digits with default space separator """ |
| return string.join(['%.2x'%ord(c) for c in bString], separator) |
| |
| def b2a_p(binary_string, frnt=' '): |
| """ convert a binary string to formatted ascii hex output """ |
| return b2a_pt(binary_string, frnt=frnt, text_trailer=None) |
| |
| def b2a_pt(binary_string, frnt=' ', gap=' ', text_trailer=1): |
| """ convert a binary string to pretty ascii hex output |
| Optional display of ascii text provided at end of hex dump """ |
| ascii_byte_list =['%.2x'%ord(c) for c in binary_string] |
| pretty_list = [] |
| trailer = [] |
| for i in range(len(ascii_byte_list)): |
| if i != 0: |
| if i % 16 == 0: # add trailer + \n every 16 bytes |
| if text_trailer != None: |
| pretty_list += [gap] + trailer |
| trailer = [] |
| pretty_list += '\n'+frnt |
| elif i % 8 == 0: pretty_list += ' ' # add an extra space every 8 bytes |
| else: pretty_list += ' ' # space between bytes |
| else: |
| pretty_list += '\n'+frnt |
| pretty_list += ascii_byte_list[i] |
| if string.find(viewable,chr(int(ascii_byte_list[i],16))) >= 0: # if printable and not white space |
| trailer += chr(int(ascii_byte_list[i],16)) |
| else: |
| trailer += '.' |
| if text_trailer != None: |
| nabs = (16-(len(ascii_byte_list)%16))%16 |
| if nabs>7 : pretty_list += ' ' |
| pretty_list += nabs*' '+gap+''.join(trailer) |
| return ''.join(pretty_list) |
| |
| def b2a_pter(s, frnt=' ', gap=' ', text_trailer=None): |
| """ convert to pretty display or leave as string if printable and short """ |
| if len(s)>50: return b2a_pt(s,' ',gap=gap,text_trailer=text_trailer) |
| for char in s: |
| if string.find(viewable,char) >= 0: # viewable? |
| pass |
| else: |
| return b2a_pt(s,frnt,gap=gap,text_trailer=text_trailer) |
| return '\n'+frnt+'"'+s+'"' |
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