def main2():
p = Preprocessing()
keys = "11110111110000001010010111101001101111101000101000000000111111111111000000001111111011011100010101010010101101010101000010111111"
KEYS = p.Convert128_to_32bits(keys)
#plain_text = "00000001110101111011011011111011110000000111010111101101101111100010111110011101001101110010100001011000100000100111011001001110"
plain_text = "00000000000000000000000000000001010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
print(plain_text)
EI_S = p.Convert128_to_32bits(plain_text)
e = Encryption()
d = Decryption()
cypher_txt = e.Encrypt(EI_S, KEYS)
print("\ncypher_txt ", cypher_txt, "\n\n")
e1, e2, e3, e4 = d.Decrypt(cypher_txt, KEYS)
decrypted_txt = e1 + e2 + e3 + e4
print("Decrypted Txt : ", decrypted_txt, "\n\n")
print(decrypted_txt == plain_text)
count = 0
for i in range(128):
if decrypted_txt[i] != plain_text[i]:
print(i + 1)
count += 1
print(count)
def Crpyto_Encrytor(self, p_text):
# encrypt it so that it gives out cypher text. which is stored in image
plain_text = p_text # input("Enter a plain text : ")
plain_text += "#####"
#example : This World shall Know Pain
print(f"Entered plian Txt : {plain_text}")
preprocessor = Preprocessing()
#convert to binary
plain_2_binary_string = preprocessor.string_2_binary(plain_text)
#append the length in front of 25 bit
#prepended_binary_string = preprocessor.prepend_length_of_binary_string(plain_2_binary_string)
prepended_binary_string = plain_2_binary_string
#padding with zeroes that binary string so that it is a multiple of 128.
padded_binary_string = preprocessor.padding_of_text(
prepended_binary_string)
#ENCRYPTION
encryptor = Encryption()
print(f"Padded Binary string pt1_txt --> : {padded_binary_string}")
print('\n\n')
cipher_text = ""
pt1_txt = padded_binary_string
keys = key_generation()
KEYS = preprocessor.Convert128_to_32bits(keys)
for i in range(0, len(padded_binary_string), 128):
string_128_bit = padded_binary_string[i:i + 128]
#Encryption starts
EI_S = preprocessor.Convert128_to_32bits(string_128_bit)
#keys = "11110111110000001010010111101001101111101000101000000000111111111111000000001111111011011100010101010010101101010101000010111111"
C1, C2, C3, C4 = encryptor.Encrypt(EI_S, KEYS)
cipher_text += C1 + C2 + C3 + C4
print("cipher_text\n", cipher_text)
print('\n')
print("pt1_txt\n", pt1_txt)
print("\n\n")
return cipher_text, keys
def main():
# For the integration testing I will take plain txt from usr converting into binary string giving it to Encryption block to
# encrypt it so that it gives out cypher text. which is tored in image
# after extraaction of cypher txt from stegeo img it will be given to the decryption module
# Decryptor decrypt it to yield plain txt.
plain_text = input("Enter a plain text : ")
#example : This World shall Know Pain
print(f"Entered plian Txt : {plain_text}")
preprocessor = Preprocessing()
#convert to binary
plain_2_binary_string = preprocessor.string_2_binary(plain_text)
#append the length in front of 25 bit
prepended_binary_string = preprocessor.prepend_length_of_binary_string(
plain_2_binary_string)
#padding with zeroes that binary string so that it is a multiple of 128.
padded_binary_string = preprocessor.padding_of_text(
prepended_binary_string)
#ENCRYPTION
encryptor = Encryption()
print(f"Padded Binary string pt1_txt --> : {padded_binary_string}")
print('\n\n')
cipher_text = ""
pt1_txt = padded_binary_string
for i in range(0, len(padded_binary_string), 128):
string_128_bit = padded_binary_string[i:i + 128]
#Encryption starts
EI_S = preprocessor.Convert128_to_32bits(string_128_bit)
keys = "11110111110000001010010111101001101111101000101000000000111111111111000000001111111011011100010101010010101101010101000010111111"
KEYS = preprocessor.Convert128_to_32bits(keys)
C1, C2, C3, C4 = encryptor.Encrypt(EI_S, KEYS)
cipher_text += C1 + C2 + C3 + C4
print("cipher_text\n", cipher_text)
print('\n')
print("pt1_txt\n", pt1_txt)
print("\n\n")
ct_text = cipher_text
#prepended the length of cypher text in front of 25 bit i.e first 25 bit shows length of cypher text
prepended_cypher_txt = preprocessor.prepend_length_of_binary_string(
cipher_text)
#padd it now this cypher txt -->prepended_cypher_txt to padded_cypher_txt
padded_cypher_txt = preprocessor.padding_of_text(prepended_cypher_txt)
#Now the padded cypher text -->padded_cypher_txt will go inside the image and image will be called after insertion as
#steogo image
#Now we have to extract LSB of whole image (or it can be modified / optimized further )
cypher_txt_after_extraction = preprocessor.extract_real_binary_string(
padded_cypher_txt)
#DECRYPTION
padded_pt_text = ""
decryptor = Decryption()
for i in range(0, len(cypher_txt_after_extraction), 128):
cypher_128_bit = cypher_txt_after_extraction[i:i + 128]
#print("###",i , i+128 , string_128_bit)
#print('\n\n')
CT_S = preprocessor.Convert128_to_32bits(cypher_128_bit)
keys = "11110111110000001010010111101001101111101000101000000000111111111111000000001111111011011100010101010010101101010101000010111111"
KEYS = preprocessor.Convert128_to_32bits(keys)
#print("\n\nKEYS : ",KEYS)
#print('\n\n')
E1, E2, E3, E4 = decryptor.Decrypt(CT_S, KEYS)
padded_pt_text += E1 + E2 + E3 + E4
print("padded_pt_text\n", padded_pt_text)
print('\n')
print("Ab bata jara ", end="")
print(pt1_txt == padded_pt_text)
#Now extracting actual binary string from padded plain txt
real_pt_text = preprocessor.extract_real_binary_string(padded_pt_text)
#Now convert this real plain txt into Ascii text
real_plain_text = preprocessor.binary_2_string(real_pt_text)
print(
f"\n\n\n\n\n\n\n\n\n After all the actual text was :--> {real_plain_text}\n\n\n\n\n\n\n\n\n"
)
