(A series of `no one needs now but might be useful someday`) Make base64-encoded-characters including specific characters.

b64make.py

#! /usr/bin/env python
# -*- coding:utf-8 -*-

# try `b64make`
# > b64make
# [+] stream   : "b64make"
# [+] patterns : 29
# [+] hit. [b64makE=] = 0x6fae266a41
# [+] hit. [B64makE=] = 0x07ae266a41
# [+] hit. [B64makE=] = 0x07ae266a41
# [+] hit. [B64makE=] = 0x07ae266a41
# [+] hit. [B64MakE=] = 0x07ae0c6a41
# [+] hit. [B64MAkE=] = 0x07ae0c0241
# [+] hit. [B64MAKE=] = 0x07ae0c00a1
# [ ] hit = 7, miss = 22, err = 0
# [+] fin.

import base64
import binascii

findc = raw_input('> ')
findl = []

# Make list of character patterns
findl.append(findc.lower())
for fixed in range(0, len(findc)):
	lf = findc[0:fixed].upper()
	rf = findc[fixed:].lower()

	for point in range(0, len(rf)):
		l = rf[0:point].lower()
		m = rf[point:point+1].upper()
		r = rf[point+1:].lower()
		findl.append(lf + l + m + r)

print("[+] stream   : \"" + findc.lower() + "\"")
print("[+] patterns : " + str(len(findl)))

# Make padding
padc = ""
pad = 4 - len(findc) % 4
if pad != 4:
	padc = "=" * pad

# Check BASE64 string
hit = mis = err = 0
for v in findl:
	try:
		b64s = v + padc
		b    = base64.b64decode(b64s)
		b64d = base64.b64encode(b)
		
		if b64s.lower() == b64d.lower():
			print("[+] hit. [" + b64d + "] = 0x" + binascii.hexlify(b))
			hit += 1
		else:
			#print("    miss. [" + b64s + "] != [" + b64d + "]")
			mis += 1
			
	except:
		err += 1

# Finalize
print("[ ] hit = " + str(hit) + ", miss = " + str(mis) + ", err = " + str(err))
print("[+] fin.")
exit()