5.16 LAB: Cryptographic Hashing Algorithms Encryption methods, such as the Caesar Cipher encryption, allow us to encrypt and decrypt text using a special key. Another method of encrypting text / passwords is called hashing. Hashing uses special algorithms to 'scramble' the text, which is tougher to be hacked. The hash function can take numbers, letters, and symbols as input, then the function applies one of the special algorithms to output the scrambled text. The longer the output string is, the harder to hack the hashed data. The difference between hashing and the Caesar Cipher encryption is that one cannot 'decrypt' a hashed data to its original text. Since a hashed data cannot be decrypted, a user must enter the original text, which will be hashed by the program. Then the program compares the hashed value with the hashed data stored previously for the original text. A salt is used, at times, to create a random sequence that is added to the original text before using the hashing algorithm. This can help prevent the Brute Force attacks from using common words to gain access. Python's hashlib module provides programmers with an API for accessing the different hashing algorithms. Some common hashing algorithms are: md5, sha1, sha224, sha256, and blake2b. To apply an hashing algorithm, import the hashlib module and specify the hashing algorithm and an encoding format to be used. A common encoding format is 'utf-8'. Given hash_function() defined in the default template, complete the main function that does the following tasks: • Create a list called hash_list that contains the five hashing algorithm names described above. • Read from the user a password to hash. • Declare a salt variable and initialize the variable to the hex representation of 4458585599393. Hint: Use function hex(). • Use a for loop to iterate over the hash_list and call the hash_function() with the hashing algorithm names in the list. Store the returned value of hash_function() in a variable and output the algorithm name used and the hashed password. Note: Output a new line after each hashed password is printed. hash_function() takes three parameters: the password to be hashed, a salt containing the hex representation of a 13-digit number, and a hashing algorithm name. hash_function() applies a specific hashing algorithm to the combination of the password and the salt value. hash_function() then returns a text containing the hashed data in hex representation and the salt value.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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import hashlib

def hash_function(password, salt, al):
  if al == 'md5':
    #md5
    hash = hashlib.md5(salt.encode() + password.encode())
    hash.update(password.encode('utf-8'))
    return hash.hexdigest() + ':' + salt
  elif (al == 'sha1'):
    #sha1  
    hash = hashlib.sha1()
    hash.update(password.encode('utf-8'))
    return hash.hexdigest() + ':' + salt
  elif al == 'sha224':
    #sha224
    hash = hashlib.sha224()
    hash.update(password.encode('utf-8'))
    return hash.hexdigest() + ':' + salt
  elif al == 'sha256':
    #sha256
    hash = hashlib.sha256()
    hash.update(password.encode('utf-8'))
    return hash.hexdigest() + ':' + salt
  elif al == 'blake2b':
    #blake2b512
    hash = hashlib.blake2b()
    hash.update(password.encode('utf-8'))
    return hash.hexdigest() + ':' + salt
  else:
    print("Error: No Algorithm!")

if __name__ == "__main__":
  # TODO: create a list called hash_list that contains
  # the five hashing algorithsm as strings
  # md5, sha1, sha224, sha256, blake2b
    hash_list = ['md5','shal','sha224','sha256','blake2b']
    
  # TODO: accept user input for a password to hash
    password = input("Enter a password to hash:")
  # TODO: create a salt variable from 13 digits (4458585599393) and 
  # convert it to hex 
    salt = hex(13)[2:]
  # TODO: use a for loop to iterate through the hash_list.
  # Inside the loop create a new variable returned from a call to the hash_function
  # Display the info as described above.  (new line after last print)
    for i in hash_list:
        print("Testing hash algorithm: " + i)
        print("Hashed password = " + hash_function(password, salt, hash_list[i]) + "\n")
 
Error message I get:

 

 

Ex: If the input is:
secretPass
the output is:
Testing hash algorithm: md5
Hashed Password
=
Testing hash algorithm: shal
Hashed Password
=
Testing hash algorithm: sha224
Hashed Password
=
442800.2138828.qx3zqy7
bd19f99253c948637d64a4acbd524047:0x40e18692 dal
=
e5fbad38af8ba59c2648e98b9ae4196dfcb9f719:0x40e18692dal
Testing hash algorithm: sha256
Hashed Password
=
ef0ed799dee 72469e5d12ab096473fe6347ae64d5541e95f42478abc: 0x40e18692dal
Testing hash algorithm: blake2b
Hashed Password
e73b86702464baa976c947a2a8c06adedc1e45ff5a35a07db41385120 cele10a: 0x40e18692dal
386eef2364609396229c7b58f3606354c12224cecfbc97f7b435c83218eee0b93d453a8ffalca2fcfcf5452013bc671fb538
Transcribed Image Text:Ex: If the input is: secretPass the output is: Testing hash algorithm: md5 Hashed Password = Testing hash algorithm: shal Hashed Password = Testing hash algorithm: sha224 Hashed Password = 442800.2138828.qx3zqy7 bd19f99253c948637d64a4acbd524047:0x40e18692 dal = e5fbad38af8ba59c2648e98b9ae4196dfcb9f719:0x40e18692dal Testing hash algorithm: sha256 Hashed Password = ef0ed799dee 72469e5d12ab096473fe6347ae64d5541e95f42478abc: 0x40e18692dal Testing hash algorithm: blake2b Hashed Password e73b86702464baa976c947a2a8c06adedc1e45ff5a35a07db41385120 cele10a: 0x40e18692dal 386eef2364609396229c7b58f3606354c12224cecfbc97f7b435c83218eee0b93d453a8ffalca2fcfcf5452013bc671fb538
5.16 LAB: Cryptographic Hashing Algorithms
Encryption methods, such as the Caesar Cipher encryption, allow us to encrypt and decrypt text using a special key. Another method of
encrypting text / passwords is called hashing. Hashing uses special algorithms to 'scramble' the text, which is tougher to be hacked. The
hash function can take numbers, letters, and symbols as input, then the function applies one of the special algorithms to output the
scrambled text. The longer the output string is, the harder to hack the hashed data. The difference between hashing and the Caesar Cipher
encryption is that one cannot 'decrypt' a hashed data to its original text.
Since a hashed data cannot be decrypted, a user must enter the original text, which will be hashed by the program. Then the program
compares the hashed value with the hashed data stored previously for the original text. A salt is used, at times, to create a random
sequence that is added to the original text before using the hashing algorithm. This can help prevent the Brute Force attacks from using
common words to gain access.
Python's hashlib module provides programmers with an API for accessing the different hashing algorithms. Some common hashing
algorithms are: md5, sha1, sha224, sha256, and blake2b. To apply an hashing algorithm, import the hashlib module and specify the hashing
algorithm and an encoding format to be used. A common encoding format is 'utf-8'.
Given hash_function() defined in the default template, complete the main function that does the following tasks:
• Create a list called hash_list that contains the five hashing algorithm names described above.
• Read from the user a password to hash.
• Declare a salt variable and initialize the variable to the hex representation of 4458585599393. Hint: Use function hex().
• Use a for loop to iterate over the hash_list and call the hash_function() with the hashing algorithm names in the list. Store the returned
value of hash_function() in a variable and output the algorithm name used and the hashed password. Note: Output a new line after
each hashed password is printed.
hash_function() takes three parameters: the password to be hashed, a salt containing the hex representation of a 13-digit number, and a
hashing algorithm name. hash_function() applies a specific hashing algorithm to the combination of the password and the salt value.
hash_function() then returns a text containing the hashed data in hex representation and the salt value.
Transcribed Image Text:5.16 LAB: Cryptographic Hashing Algorithms Encryption methods, such as the Caesar Cipher encryption, allow us to encrypt and decrypt text using a special key. Another method of encrypting text / passwords is called hashing. Hashing uses special algorithms to 'scramble' the text, which is tougher to be hacked. The hash function can take numbers, letters, and symbols as input, then the function applies one of the special algorithms to output the scrambled text. The longer the output string is, the harder to hack the hashed data. The difference between hashing and the Caesar Cipher encryption is that one cannot 'decrypt' a hashed data to its original text. Since a hashed data cannot be decrypted, a user must enter the original text, which will be hashed by the program. Then the program compares the hashed value with the hashed data stored previously for the original text. A salt is used, at times, to create a random sequence that is added to the original text before using the hashing algorithm. This can help prevent the Brute Force attacks from using common words to gain access. Python's hashlib module provides programmers with an API for accessing the different hashing algorithms. Some common hashing algorithms are: md5, sha1, sha224, sha256, and blake2b. To apply an hashing algorithm, import the hashlib module and specify the hashing algorithm and an encoding format to be used. A common encoding format is 'utf-8'. Given hash_function() defined in the default template, complete the main function that does the following tasks: • Create a list called hash_list that contains the five hashing algorithm names described above. • Read from the user a password to hash. • Declare a salt variable and initialize the variable to the hex representation of 4458585599393. Hint: Use function hex(). • Use a for loop to iterate over the hash_list and call the hash_function() with the hashing algorithm names in the list. Store the returned value of hash_function() in a variable and output the algorithm name used and the hashed password. Note: Output a new line after each hashed password is printed. hash_function() takes three parameters: the password to be hashed, a salt containing the hex representation of a 13-digit number, and a hashing algorithm name. hash_function() applies a specific hashing algorithm to the combination of the password and the salt value. hash_function() then returns a text containing the hashed data in hex representation and the salt value.
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