[Tutor] i dont understand this code

[bob gailer]

On 2/22/2014 7:26 AM, piyush joshi wrote:
>
> Can anyone help me out in understanding this code
>
Your question is kinda vague. Exactly what do you not understand?

> #
>
> import os
>
> rotationMatrix1 = [7, 1, 5, 3, 0, 6, 2, 5, 2, 3, 0, 6, 1, 7, 6, 1, 5, 
> 2, 7, 1, 0, 3, 7, 6, 1, 0, 5, 2, 1, 5, 7, 3, 2, 0, 6]
>
> rotationMatrix2 = [1, 6, 2, 5, 7, 3, 0, 7, 1, 6, 2, 5, 0, 3, 0, 6, 5, 
> 1, 1, 7, 2, 5, 2, 3, 7, 6, 2, 1, 3, 7, 6, 5, 0, 1, 7]
>
> keyboardDict = {  2: '1',  3: '2',  4: '3',  5: '4',  6: '5',  7: 
> '6',  8: '7',  9: '8', 10: '9', 11: '0',
>
>                  16: 'q', 17: 'w', 18: 'e', 19: 'r', 20: 't', 21: 'y', 
> 22: 'u', 23: 'i', 24: 'o', 25: 'p',
>
>                  30: 'a', 31: 's', 32: 'd', 33: 'f', 34: 'g', 35: 'h', 
> 36: 'j', 37: 'k', 38: 'l',
>
>                  44: 'z', 45: 'x', 46: 'c', 47: 'v', 48: 'b', 49: 'n', 
> 50: 'm' }
>
> def keyboardEncToAscii(inKey):
>
>                 out = ""
>
>                 for c in inKey:
>
>                                 if c == 0: return out
>
>                                 if c in keyboardDict: out += 
> keyboardDict[c]
>
>                                 else: return ""
>
>                 return out
>
> def decryptHash(hash, key, rotationMatrix):
>
>                 outhash = []
>
>                 for i in range(0, len(hash)):
>
> outhash.append(((hash[i] << (rotationMatrix[7*key+i])) & 0xFF) | 
> (hash[i] >> (8-rotationMatrix[7*key+i])))
>
>                 return outhash
>
> print("")
>
> print("hexa decimal code")
>
> print("hexadecimal code from which the password can be calculated,")
>
> print("07088120410C0000")
>
> print("")
>
> print("Please enter the code: ")
>
> code = raw_input()
>
> hash = []
>
> for i in range(1, len(code) // 2):
>
> hash.append(int(code[2*i]+code[2*i+1],16))
>
> key = int(code[0:2], 16) % 5
>
> password = keyboardEncToAscii(decryptHash(hash, key, rotationMatrix1))
>
> if password == "":
>
>                 password = keyboardEncToAscii(decryptHash(hash, key, 
> rotationMatrix2))
>
> if password == "":
>
>                 print("The password could not be calculated. Bummer.")
>
> else:
>
>                 print("The password is: " + password)
>
> if (os.name == 'nt'):
>
>                 print("Press a key to exit...")
>
>                 raw_input()
>
>
>
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