d2PkpbM2

1hmac_blocksize=16
2def strToNum(inp):
3    """Takes a sequence of bytes and makes a number"""
4    out=0
5    for i in inp:
6        out=out<<8
7        out^=ord(i)
8    return out
9def numToStr(inp):
10    """Take a number and make a sequence of bytes in a string"""
11    out=""
12    while inp!=0:
13        out=chr(inp & 255)+out
14        inp=inp>>8
15    return out
16def cueh_hash_1(inp):
17    """ CUEH Hash Function v 1.0
18   Returns 16 bit hash of any string input or stringable input
19   """
20    inp=str(inp) #Make sure we have a string
21    if len(inp)%2!=0: inp+=" " #Pad it if we need to
22    val=0 #Our accumulator
23    for pos in range(0,len(inp),2): #Now in twos...
24        i=inp[pos]
25        j=inp[pos+1]
26        # print "\tEncoding",i,j
27        val^=ord(i)  #XOR first char onto lowest 8 bits
28        val^=(ord(j)<<8)  #and second char onto highest 8 bits
29    #     print "\t\t",val
30    # print "\t",val
31    return val
32 
33def cueh_hmac_1(key, message):
34    """Outputs a hash-based digest of the message and secret key combo"""
35    key=str(key)
36    message=str(message)
37    if len(key)>hmac_blocksize/8:
38        key=numToStr(cueh_hash_1(key)) #Keys are shortened to blocksize
39    while len(key)<hmac_blocksize/8:
40        key+=" " #Keys are padded with spaces if they're too short
41    # print "0x%x"%cueh_hash_1(key+message)
42    return cueh_hash_1(key+message)
43   
44if __name__=="__main__":
45    print "-"*20
46    #Examples of flipping between numbers and strings of bytes
47    #Just makes it easier to have "password" style keys
48    print "%x"%strToNum("ABC")
49    print numToStr((65<<16) + (66<<8) + 67)
50 
51    #Now to see it in practice
52    
53    #secretKey="cCAA"  #This is known by both parties
54    #authedMessage="This is a test of the emergency broadcast system." 
55   
56    #out=cueh_hmac_1(secretKey,authedMessage)
57    
58    #Now we have the special verification code that can be used to
59    #prove we were the aithor of the message. Anyone else who knows
60    #the secret can do the same and compare the values    
61    #print "%d|%s"%(out, authedMessage)
62    
63    s = "AAA"
64    r = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
65    i = 0
66    
67    for x2 in range(52):
68	for x3 in range(52):
69		for x4 in range(52):
70			secretKey = r[x2] + r[x3] + r[x4]
71			authedMessage="power up gigamatrix server"
72			out=cueh_hmac_1(secretKey,authedMessage)
73			if(out == 25193):
74				authedMessage="install toaster updates"
75				out=cueh_hmac_1(secretKey,authedMessage)
76				if(out == 21084):
77					authedMessage="realign singularity polishing buffers"
78					out=cueh_hmac_1(secretKey,authedMessage)
79					if(out == 25136):
80						authedMessage="enhance undulation"
81						out=cueh_hmac_1(secretKey,authedMessage)
82						if(out == 14382):
83							authedMessage="detatch porpoise"
84							out=cueh_hmac_1(secretKey,authedMessage)
85							if(out == 23900):
86								print "This is secret key: " + secretKey