-
-
[原创] KCTF 2019 Q2 第六题 XBase64
-
发表于: 2019-6-24 21:04
-
改版的base64
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | b64str = 'tuvwxTUlmnopqrs7YZabcdefghij8yz0123456VWXkABCDEFGHIJKLMNOPQRS9+/'', '.join(["'{}'".format(c) for c in b64str])a = []for i in range(0,0x100): if chr(i) in b64str: a.append(b64str.index(chr(i))) else: a.append(0xFF)def charEncrypt(i): global b64str icv = c_ubyte(ord(b64str[i])).value if (icv > 0x40) and (icv <= 0x5A): return chr(c_ubyte(0x9B-icv).value) elif (icv > 0x60) and (icv <= 0x7A): return chr(c_ubyte(icv-0x40).value) elif (icv > 0x2F) and (icv <= 0x39): return chr(c_ubyte(icv+0x32).value) elif icv==0x2B: return chr(c_ubyte(0x77).value) elif icv==0x2F: return chr(c_ubyte(0x79).value) else: return chr(c_ubyte(icv).value)dicv = []for i in range(0,b64str.__len__()): v = charEncrypt(i) if v not in dicv: dicv.append(v) else: raise Exception("")''.join(b64str[dicv.index(c)] if c!='=' else '=' for c in "!NGV%,$h1f4S3%2P(hkQ94==" )"aMTEeld6q4tHserKh69Jyt==" |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | b64str = 'tuvwxTUlmnopqrs7YZabcdefghij8yz0123456VWXkABCDEFGHIJKLMNOPQRS9+/'', '.join(["'{}'".format(c) for c in b64str])a = []for i in range(0,0x100): if chr(i) in b64str: a.append(b64str.index(chr(i))) else: a.append(0xFF)def charEncrypt(i): global b64str icv = c_ubyte(ord(b64str[i])).value if (icv > 0x40) and (icv <= 0x5A): return chr(c_ubyte(0x9B-icv).value) elif (icv > 0x60) and (icv <= 0x7A): return chr(c_ubyte(icv-0x40).value) elif (icv > 0x2F) and (icv <= 0x39): return chr(c_ubyte(icv+0x32).value) elif icv==0x2B: return chr(c_ubyte(0x77).value) elif icv==0x2F: return chr(c_ubyte(0x79).value) else: return chr(c_ubyte(icv).value)dicv = []for i in range(0,b64str.__len__()): v = charEncrypt(i) if v not in dicv: dicv.append(v) else: raise Exception("")''.join(b64str[dicv.index(c)] if c!='=' else '=' for c in "!NGV%,$h1f4S3%2P(hkQ94==" )"aMTEeld6q4tHserKh69Jyt==" |
[培训]内核驱动高级班，冲击BAT一流互联网大厂工作，每周日13:00-18:00直播授课
最后于 2019-6-26 09:33
被HHHso编辑
，原因：
|
|
|---|---|
