hexdump.py

def hexdump(src, length=16, sep='.'):
	"""
	@brief Return {src} in hex dump.
	@param[in] length	{Int} Nb Bytes by row.
	@param[in] sep		{Char} For the text part, {sep} will be used for
                                non ASCII char.
	@return {Str} The hexdump
	"""
	result = []

	# Python3 support
	try:
		xrange(0, 1)
	except NameError:
		xrange = range

	for i in xrange(0, len(src), length):
		subSrc = src[i:i+length]
		hexa = ''
		for h in xrange(0,len(subSrc)):
			if h == length/2:
				hexa += ' '
			h = subSrc[h]
			if not isinstance(h, int):
				h = ord(h)
			h = hex(h).replace('0x', '')
			if len(h) == 1:
				h = '0' + h
			hexa += h + ' '
		hexa = hexa.strip(' ')
		text = ''
		for c in subSrc:
			if not isinstance(c, int):
				c = ord(c)
			if 0x20 <= c < 0x7F:
				text += chr(c)
			else:
				text += sep
		result.append(
                    ('%08X:  %-'+str(length*(2+1)+1)+'s  |%s|') % (i, hexa, text))

	return '\n'.join(result)


################################################################################
# Basic usage:

from binascii import unhexlify, hexlify
def h2bin( x ):
	return unhexlify(str.encode(x.replace(' ', '').replace('\n', '')))

hello_openvpn = h2bin('''
16 03 01 00 df 01 00 00 db 03 01 95 a3 8a 7f 46
a9 1c 78 99 21 ae 92 6d 2d 14 5a 8f 2b c8 ee e2
0b 9e 38 34 ec 3d 66 2b 9c d5 63 00 00 68 c0 14
c0 0a c0 22 c0 21 00 39 00 38 00 88 00 87 c0 0f
c0 05 00 35 00 84 c0 12 c0 08 c0 1c c0 1b 00 16
00 13 c0 0d c0 03 00 0a c0 13 c0 09 c0 1f c0 1e
00 33 00 32 00 9a 00 99 00 45 00 44 c0 0e c0 04
00 2f 00 96 00 41 00 07 c0 11 c0 07 c0 0c c0 02
00 05 00 04 00 15 00 12 00 09 00 14 00 11 00 08
00 06 00 03 00 ff 02 01 00 00 49 00 0b 00 04 03
00 01 02 00 0a 00 34 00 32 00 0e 00 0d 00 19 00
0b 00 0c 00 18 00 09 00 0a 00 16 00 17 00 08 00
06 00 07 00 14 00 15 00 04 00 05 00 12 00 13 00
01 00 02 00 03 00 0f 00 10 00 11 00 23 00 00 00
0f 00 01 01
''')

print(hexdump(hello_openvpn))


# Will print:
'''
00000000:  16 03 01 00 df 01 00 00  db 03 01 95 a3 8a 7f 46   |...............F|
00000010:  a9 1c 78 99 21 ae 92 6d  2d 14 5a 8f 2b c8 ee e2   |..x.!..m-.Z.+...|
00000020:  0b 9e 38 34 ec 3d 66 2b  9c d5 63 00 00 68 c0 14   |..84.=f+..c..h..|
00000030:  c0 0a c0 22 c0 21 00 39  00 38 00 88 00 87 c0 0f   |...".!.9.8......|
00000040:  c0 05 00 35 00 84 c0 12  c0 08 c0 1c c0 1b 00 16   |...5............|
00000050:  00 13 c0 0d c0 03 00 0a  c0 13 c0 09 c0 1f c0 1e   |................|
00000060:  00 33 00 32 00 9a 00 99  00 45 00 44 c0 0e c0 04   |.3.2.....E.D....|
00000070:  00 2f 00 96 00 41 00 07  c0 11 c0 07 c0 0c c0 02   |./...A..........|
00000080:  00 05 00 04 00 15 00 12  00 09 00 14 00 11 00 08   |................|
00000090:  00 06 00 03 00 ff 02 01  00 00 49 00 0b 00 04 03   |..........I.....|
000000A0:  00 01 02 00 0a 00 34 00  32 00 0e 00 0d 00 19 00   |......4.2.......|
000000B0:  0b 00 0c 00 18 00 09 00  0a 00 16 00 17 00 08 00   |................|
000000C0:  06 00 07 00 14 00 15 00  04 00 05 00 12 00 13 00   |................|
000000D0:  01 00 02 00 03 00 0f 00  10 00 11 00 23 00 00 00   |............#...|
000000E0:  0f 00 01 01                                        |....|
'''