def enc():
# this function is imported from tkFileDialog
# you can specify the filetypes of your choice
# there is an other function called LoadFileDialog
# which also
# performs the same function.
# RETURNS THE PATH OF THE INPUT FILE
# TO BE ENCRYPTED
path_ip=askopenfilename(filetypes=[("Path of file to be Encrypted","*"),("pythonfiles","*.py")])
# CHECKS IF ENCRYPTION IS CANCELLED
if path_ip == ():
e1.insert(0," Encryption cancelled ")
return
# RETURNS THE PATH OF THE INTERMEDIATE
# FILE TO WRITE THE ENCRYPTED DATA
path_im=asksaveasfilename(title="Path of Encrypted File",defaultextension=".smt",filetypes=[("Path of Encrypted file","*.smt")])
fip=open(path_ip,'r')
fim=open(path_im,'w')
fim.close()
fim=open(path_im,'a')
START='1010101010101010'
fim.write(START)
# A ARRAY OF PRIME NO 2 B CREATED
k=random.randint(1,34)
j=random.randint(1,34)
PRIME=packages.prime()
extnd = 1000000000000000
while k == j :
k=random.randint(0,34)
j=random.randint(0,34)
# RANDOM PRIME NUMBERS
p=PRIME[k]
q=PRIME[j]
print "p is obtained........ "#,p
print "q is obtained........ "#,q
# CALCULATE n VALUE
n=p*q
print "n is calculated...... "#,n
# CALCULATE PHI
PHI=(p - 1)*(q - 1)
print "PHI is calculated.... ",#PHI
PHI_bin=packages.a2b(PHI)
PHI_bin = PHI_bin + extnd
# CALCULATE e ( PUBLIC KEY )
e=packages.slcinte(PHI)
print "e is selected........",#e
e_bin=packages.a2b(e)
e_bin = e_bin + extnd
e_chr=str(e_bin)
# RANDOM INDEX FOR e IN FILE
indx=random.randint(3,23)
indx_bin=packages.a2b(indx)
indx_bin = indx_bin + extnd
INDX_chr=str(indx_bin)
fim.write(INDX_chr)
# INPUT PHI TO FILE
PHI_chr=str(PHI_bin)
#print "PHI : ",PHI_chr
fim.write(PHI_chr)
# WRITE INDEXED e AND ALL ELSE
# RANDOM VALUES
for l in range(3,24) :
if l == indx :
fim.write(e_chr)
else :
o = random.randint(0,255)
o = packages.a2b(o)
o = o + extnd
o_chr=str(o)
fim.write(o_chr)
# WRITE n TO FILE
n_bin =packages.a2b(n)
n_bin = n_bin + extnd
n_chr = str(n_bin)
fim.write(n_chr)
# LOOP TILL EOF OF INPUT FILE
# AND ENCRYPT
input=fip.read()
for i in input:
M=ord(i)
C=packages.de_en(M,e,n)
a_bin=packages.a2b(C)
a_bin = a_bin + extnd
a_chr=str(a_bin)
fim.write(a_chr)
fim.write('1111111111111111')
fim.close()
print "\n ENCRYPTION COMPLETED/n"
# WINDOW OPPERATIONS
e1.delete(0, END)
e1.insert(0, "encryption n = %d"%n)
def dec():
n_USER=e2.get() # GET THE USER INPUT n VALUE
if n_USER == "Enter n":
return
if n_USER == " Decryption cancelled " :
v.set("Enter n")
return
n_USR=int(n_USER)
if n_USR == 0:
e2.delete(0,END)
v.set("Enter n")
return
# RETURNS THE PATH OF THE INTERMEDIATE # TO READ THE ENCRYPTED DATA
path_im=askopenfilename(title="Path of the Encrypted File",filetypes=[("Encrypted file","*.smt"),("pythonfiles","*.py")])
#this function is imported from tkFileDialog
#you can specify the filetypes of your choice
#there is an other function called LoadFileDialog which also
# CHECKS IF DECRYPTION IS CANCELLED
if path_im == () :
v.set(" Decryption cancelled ")
return
fim=open(path_im,'r')
fim.seek(0)
# check the file if decryption possible
# genuine intermediary file
# encrypted using the same program
binLen = 16
sf_cd = 1010101010101010
bin=int(fim.read(binLen))
if bin != sf_cd :
print "\nnot safe\n"
return
else :
print "\nsafe\n"
# RETREIVE INDEX TO FIND e
# ( PUBLIC KEY )
bin=int(fim.read(binLen))
index = packages.b2a(bin)
print "index is retrieved....."#,index
# RETREIVE PHI VALUE
bin=int(fim.read(binLen))
PHI = packages.b2a(bin)
print "PHI is retrieved......"#,PHI
# RETREIVE e ( PUBLIC KEY )
fim.seek(binLen*index)
bin=int(fim.read(binLen))
e = packages.b2a(bin)
print "e is retrieved........"#,e
# CALCULATE d ( PRIVATE KEY )
d=packages.get_d(e,PHI)
print "d is evaluated........"#,d
fim.seek(binLen*24) # REACH THE n VALUE
bin=int(fim.read(binLen))
n = packages.b2a(bin)
# RECEIVE THE USER INPUT n VALUE
# CHECKS AUTHORISATION
if n_USR == n :
# RETURNS THE PATH OF THE OUTPUT FILE
# TO GET THE DECRYPTED ACTUAL OUTPUT
path_op=asksaveasfilename(title="Path of the decrypted File",filetypes=[("Text","*"),("Images","*.jpg"),("BitMapImage","*.bmp"),("pythonfiles","*.py")])
#this function is imported from tkFileDialog
#you can specify the filetypes of your choice
#there is an other function called LoadFileDialog which also
fop=open(path_op,'a')
fop.seek(0)
eoff = 1111111111111111
bin=int(fim.read(binLen))
while bin != eoff :
C = packages.b2a(bin)
M = packages.de_en(C,d,n)
txt=chr(M)
fop.write(txt)
bin = int(fim.read(binLen))
fim.close()
fop.close()
e2.delete(0,END)
v.set("0")
else :
print "Wrong n entered"
e2.delete(0,END)
v.set("0")
# path_op=raw_input("ENTER THE PATH OF THE DECRYPTED FILE :\n")
# root=Tk()
path_op = askopenfilename(filetypes=[("Path were the file should be Decrypted", "*"), ("pythonfiles", "*.py")])
# print "file found..............."
fop = open(path_op, "a")
fop.seek(0)
eoff = 1111111111111111
bin = int(fim.read(binLen))
while bin != eoff:
# print "bin : ",bin
C = packages.b2a(bin)
# print "C : ",C
M = packages.de_en(C, d, n)
# print "M : ",M
txt = chr(M)
# print "txt :",txt
fop.write(txt)
bin = int(fim.read(binLen))
fim.close()
fop.close()
print " DECRYPTION COMPLETED............"
else:
print "Wrong n entered"
# $Id: filebrowser2.py,v 1.2 2004/03/18 05:52:22 mandava Exp $
# this is a program that uses askopenfilename function to open files.
# this function is imported from tkFileDialog
