输入为32位，每两位转换为16进制数，校验分为两部分
这里的算法是生成一个八层的二叉树，然后判断第八层节点中值为0,14,40,79的个数
二叉树生成逻辑如下
这里我推了一段时间发现是不可逆的（可能我太菜，欢迎大佬指正），只能爆破，因为在生成二叉树时可以索引到tmp表的所有成员，所以猜测只要爆破tmp表的前8个数即可，共8的阶乘种可能性，规模不大
简单的换表加密，直接爆破
tmp=[...]
父节点(parent)
左儿子(tmp[parent]) 右儿子(parent+1)
根节点的值为1~256，共256个二叉树
tmp=[...]
父节点(parent)
左儿子(tmp[parent]) 右儿子(parent+1)
根节点的值为1~256，共256个二叉树
off=[0x00000002, 0x00000004, 0x00000008, 0x00000010, 0x00000020, 0x00000040,0x80]
table=[0x12, 0x43, 0x65, 0x87, 0x19, 0x32, 0x54, 0x67, 0xA2, 0x9B,
0xF4, 0xDF, 0xAC, 0x7C, 0xA1, 0xC6, 0x16, 0xD0, 0x0F, 0xDD,
0xDC, 0x73, 0xC5, 0x6B, 0xD1, 0x96, 0x47, 0xC2, 0x26, 0x67,
0x4E, 0x41, 0x82, 0x20, 0x56, 0x9A, 0x6E, 0x33, 0x92, 0x88,
0x29, 0xB5, 0xB4, 0x71, 0xA9, 0xCE, 0xC3, 0x34, 0x50, 0x59,
0xBF, 0x2D, 0x57, 0x22, 0xA6, 0x30, 0x04, 0xB2, 0xCD, 0x36,
0xD5, 0x68, 0x4D, 0x5B, 0x45, 0x9E, 0x85, 0xCF, 0x9D, 0xCC,
0x61, 0x78, 0x32, 0x76, 0x31, 0xE3, 0x80, 0xAD, 0x39, 0x4F,
0xFA, 0x72, 0x83, 0x4C, 0x86, 0x60, 0xB7, 0xD7, 0x63, 0x0C,
0x44, 0x35, 0xB3, 0x7B, 0x19, 0xD4, 0x69, 0x08, 0x0B, 0x1F,
0x3D, 0x11, 0x79, 0xD3, 0xEE, 0x93, 0x42, 0xDE, 0x23, 0x3B,
0x5D, 0x8D, 0xA5, 0x77, 0x5F, 0x58, 0xDB, 0x97, 0xF6, 0x7A,
0x18, 0x52, 0x15, 0x74, 0x25, 0x62, 0x2C, 0x05, 0xE8, 0x0D,
0x98, 0x2A, 0x43, 0xE2, 0xEF, 0x48, 0x87, 0x49, 0x1C, 0xCA,
0x2B, 0xA7, 0x8A, 0x09, 0x81, 0xE7, 0x53, 0xAA, 0xFF, 0x6F,
0x8E, 0x91, 0xF1, 0xF0, 0xA4, 0x46, 0x3A, 0x7D, 0x54, 0xEB,
0x2F, 0xC1, 0xC0, 0x0E, 0xBD, 0xE1, 0x6C, 0x64, 0xBE, 0xE4,
0x02, 0x3C, 0x5A, 0xA8, 0x9F, 0x37, 0xAF, 0xA0, 0x13, 0xED,
0x1B, 0xEC, 0x8B, 0x3E, 0x7E, 0x27, 0x99, 0x75, 0xAB, 0xFE,
0xD9, 0x3F, 0xF3, 0xEA, 0x70, 0xF7, 0x95, 0xBA, 0x1D, 0x40,
0xB0, 0xF9, 0xE5, 0xF8, 0x06, 0xBC, 0xB6, 0x03, 0xC9, 0x10,
0x9C, 0x2E, 0x89, 0x5C, 0x7F, 0xB1, 0x1A, 0xD6, 0x90, 0xAE,
0xDA, 0xE6, 0x5E, 0xB9, 0x84, 0xE9, 0x55, 0xBB, 0xC7, 0x0A,
0xE0, 0x66, 0xF2, 0xD8, 0xCB, 0x00, 0x12, 0xB8, 0x17, 0x94,
0x6A, 0x4A, 0x01, 0x24, 0x14, 0x51, 0x07, 0x65, 0x21, 0xC8,
0x38, 0xFD, 0x8F, 0xC4, 0xF5, 0xFC]
def check(flag):
global off
byte_404220=[0]*512
v25=[[0 for i in range(256)] for i in range(256)]
v=0
index=1
while 1:
byte_404220[0]=flag[index-1]
byte_404220[1]=index%256
tmp=2
count=0
for i in range(len(off)):
for k in range(off[i]):
byte_404220[tmp]=flag[(byte_404220[count])&0xff]
byte_404220[tmp+1]=(byte_404220[count]+1)%256
count+=1
tmp+=2
for i in range(256):
v25[v][byte_404220[count]]+=1
count+=1
v+=1
index+=1
if index>256:
break
v21=0
v22=0
v23=0
v24=0
for i in range(256):
if v25[i][0]:
v21+=1
if v25[i][40-26]:
v22+=1
if v25[i][40]:
v23+=1
if v25[i][40+39]:
v24+=1
if v21==169 and v22==172 and v23==167 and v24>200:
return 1
return 0
def equal(a,b,c,d,e,f,g,h):
if a==b or a==c or a==d or a==e or a==f or a==g or a==h:
return 1
if b==c or b==d or b==e or b==f or b==g or b==h:
return 1
if c==d or c==e or c==f or c==g or c==h:
return 1
if d==e or d==f or d==g or d==h:
return 1
if e==f or e==g or e==h:
return 1
if f==g or f==h:
return 1
if g==h:
return 1
return 0
s=[0x1e,0x28,0x4b,0x6d,0x8c,0xa3,0xd2,0xfb]
for i in s:
for j in s:
for k in s:
for l in s:
for m in s:
for n in s:
for x in s:
for y in s:
if equal(i,j,k,l,m,n,x,y):
continue
table[0]=i
table[1]=j
table[2]=k
table[3]=l
table[4]=m
table[5]=n
table[6]=x
table[7]=y
if check(table):
print(hex(i),hex(j),hex(k),hex(l),hex(m),hex(n),hex(x),hex(y))
off=[0x00000002, 0x00000004, 0x00000008, 0x00000010, 0x00000020, 0x00000040,0x80]
table=[0x12, 0x43, 0x65, 0x87, 0x19, 0x32, 0x54, 0x67, 0xA2, 0x9B,
0xF4, 0xDF, 0xAC, 0x7C, 0xA1, 0xC6, 0x16, 0xD0, 0x0F, 0xDD,
0xDC, 0x73, 0xC5, 0x6B, 0xD1, 0x96, 0x47, 0xC2, 0x26, 0x67,
0x4E, 0x41, 0x82, 0x20, 0x56, 0x9A, 0x6E, 0x33, 0x92, 0x88,
0x29, 0xB5, 0xB4, 0x71, 0xA9, 0xCE, 0xC3, 0x34, 0x50, 0x59,
0xBF, 0x2D, 0x57, 0x22, 0xA6, 0x30, 0x04, 0xB2, 0xCD, 0x36,
0xD5, 0x68, 0x4D, 0x5B, 0x45, 0x9E, 0x85, 0xCF, 0x9D, 0xCC,
0x61, 0x78, 0x32, 0x76, 0x31, 0xE3, 0x80, 0xAD, 0x39, 0x4F,
0xFA, 0x72, 0x83, 0x4C, 0x86, 0x60, 0xB7, 0xD7, 0x63, 0x0C,
0x44, 0x35, 0xB3, 0x7B, 0x19, 0xD4, 0x69, 0x08, 0x0B, 0x1F,
0x3D, 0x11, 0x79, 0xD3, 0xEE, 0x93, 0x42, 0xDE, 0x23, 0x3B,
0x5D, 0x8D, 0xA5, 0x77, 0x5F, 0x58, 0xDB, 0x97, 0xF6, 0x7A,
0x18, 0x52, 0x15, 0x74, 0x25, 0x62, 0x2C, 0x05, 0xE8, 0x0D,
0x98, 0x2A, 0x43, 0xE2, 0xEF, 0x48, 0x87, 0x49, 0x1C, 0xCA,
0x2B, 0xA7, 0x8A, 0x09, 0x81, 0xE7, 0x53, 0xAA, 0xFF, 0x6F,
0x8E, 0x91, 0xF1, 0xF0, 0xA4, 0x46, 0x3A, 0x7D, 0x54, 0xEB,
0x2F, 0xC1, 0xC0, 0x0E, 0xBD, 0xE1, 0x6C, 0x64, 0xBE, 0xE4,
0x02, 0x3C, 0x5A, 0xA8, 0x9F, 0x37, 0xAF, 0xA0, 0x13, 0xED,
0x1B, 0xEC, 0x8B, 0x3E, 0x7E, 0x27, 0x99, 0x75, 0xAB, 0xFE,
0xD9, 0x3F, 0xF3, 0xEA, 0x70, 0xF7, 0x95, 0xBA, 0x1D, 0x40,
0xB0, 0xF9, 0xE5, 0xF8, 0x06, 0xBC, 0xB6, 0x03, 0xC9, 0x10,
0x9C, 0x2E, 0x89, 0x5C, 0x7F, 0xB1, 0x1A, 0xD6, 0x90, 0xAE,
0xDA, 0xE6, 0x5E, 0xB9, 0x84, 0xE9, 0x55, 0xBB, 0xC7, 0x0A,
0xE0, 0x66, 0xF2, 0xD8, 0xCB, 0x00, 0x12, 0xB8, 0x17, 0x94,
0x6A, 0x4A, 0x01, 0x24, 0x14, 0x51, 0x07, 0x65, 0x21, 0xC8,
0x38, 0xFD, 0x8F, 0xC4, 0xF5, 0xFC]
def check(flag):
global off
byte_404220=[0]*512
v25=[[0 for i in range(256)] for i in range(256)]
v=0
index=1
while 1:
byte_404220[0]=flag[index-1]
byte_404220[1]=index%256
tmp=2
count=0
for i in range(len(off)):
for k in range(off[i]):
byte_404220[tmp]=flag[(byte_404220[count])&0xff]
byte_404220[tmp+1]=(byte_404220[count]+1)%256
count+=1
tmp+=2
for i in range(256):
v25[v][byte_404220[count]]+=1
count+=1
v+=1
index+=1
if index>256:
break
v21=0
v22=0
v23=0
v24=0
for i in range(256):
if v25[i][0]:
v21+=1
if v25[i][40-26]:
v22+=1
if v25[i][40]:
v23+=1
if v25[i][40+39]:
v24+=1
if v21==169 and v22==172 and v23==167 and v24>200:
return 1
return 0
def equal(a,b,c,d,e,f,g,h):
if a==b or a==c or a==d or a==e or a==f or a==g or a==h:
return 1
if b==c or b==d or b==e or b==f or b==g or b==h:
return 1
if c==d or c==e or c==f or c==g or c==h:
return 1
if d==e or d==f or d==g or d==h:
return 1
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