Added decrypt and encrypt source files.

i

decrypt.py

@@ -0,0 +1,104 @@
+
+def alpha_reverse(list):
+    f_output=input("Enter the file name with extension name(.txt) in which the decrypted code will be saved: ")
+    coding=list[0]+list[1]+list[2]+list[3]
+    a_list=list[5:]
+    dlist=[]
+    if coding=='#a1#':
+        for i in a_list:
+            if ord(i)>=97 and ord(i)<=122:
+                d=122-ord(i)
+                dlist.append(chr(97+d))
+            elif ord(i)>=0 and ord(i)<=31 :
+                d=31-ord(i)
+                dlist.append(chr(0+d))
+            elif ord(i)>=32 and ord(i)<=64:
+                d=64-ord(i)
+                dlist.append(chr(32+d))
+            elif ord(i)>=65 and ord(i)<=90:
+                d=90-ord(i)
+                dlist.append(chr(65+d))
+            elif ord(i)>=91 and ord(i)<=96:
+                d=96-ord(i)
+                dlist.append(chr(91+d))
+            elif ord(i)>=123 and ord(i)<=126 :
+                d=126-ord(i)
+                dlist.append(chr(123+d))
+            elif ord(i)>=128 and ord(i)<=255 :
+                d=255-ord(i)
+                dlist.append(chr(128+d))
+
+        dll=len(dlist)
+        k=open(f_output, 'a')
+        i=0
+        while i<dll:
+            k.write(str(dlist[i]))
+            i=i+1
+        k.close()
+        print("Decryption Completed!!")
+    else:
+        print('Cryptography code mismatch!!')
+
+def morse_code(f_name):
+    f_output=input("Enter the file name with extension name(.txt) in which the decrypted code will be saved: ")
+    rlist=[]
+    f=open(f_name, "r")
+    array=f.readlines()
+    m_array=array[1:]
+    e_code=array[0]
+    #print(e_code)
+
+    CODE = {'.-\n':'A','-...\n':'B','-.-.\n':'C','-..\n':'D','.\n':'E','..-.\n':'F','--.\n':'G','....\n':'H','..\n':'I','.---\n':'J','-.-\n':'K','.-..\n':'L','--\n':'M','-.\n':'N','---\n':'O','.--.\n':'P','--.-\n':'Q','.-.\n':'R','...\n':'S','-\n':'T','..-\n':'U','...-\n':'V','.--\n':'W','-..-\n':'X','-.--\n':'Y','--..\n':'Z','-----\n':'0','.----\n':'1','..---\n':'2','...--\n':'3','....-\n':'4','.....\n':'5','-....\n':'6','--...\n':'7','---..\n':'8','----.\n':'9','@\n':' '}
+    if e_code=='#m1#\n':
+        for i in m_array:
+            #print(CODE[i.upper()])
+            rlist.append(CODE[i.upper()])
+            #print(rlist)
+        rdl=len(rlist)
+        k=open(f_output,'a')
+        i=0
+        while i<rdl:
+            k.write(str(rlist[i]))
+            i=i+1
+        k.close()
+        print("Decryption Completed!!")
+    else:
+        print('Crytography code mismatch!! ')
+
+if __name__=="__main__":
+
+    while 1:
+        menuch=input("Go to the menu: Y/N: ")
+        if menuch=="y" or menuch=='Y':
+            f_name=input("Enter the the file name (with extension name (.txt))in which the encrypted code is present: ")
+            list=[]
+
+            fp=open(f_name,'r')
+            while 1:
+                char=fp.read(1)
+                if not char:
+                    break
+                list.append(char)
+            print(list)
+            print("\n\n")
+            print(" a: Alpha reverse")
+            print(' b: Morse Code')
+            print(" x : Exit")
+            ch = input("Enter in which format the code is: ")
+
+
+            if ch == 'a':
+                alpha_reverse(list)
+
+
+            if ch=='b':
+                morse_code(f_name)
+
+            if ch == 'x':
+                break
+
+            elif ch!='a' and ch!='b' and ch!='x':
+                print('invalid choice')
+
+        else:
+            break

encrypt.py

@@ -0,0 +1,89 @@
+
+
+def alpha_reverse(ulist):
+    f_name=input("File name with extension name(.txt) the message is to be saved : ")
+    rlist=['#a1#\n']
+    for i in ulist:
+        if ord(i)>=97 and ord(i)<=122 :
+            d=122-ord(i)
+            rlist.append(chr(97+d))
+        elif ord(i)>=0 and ord(i)<=31 :
+            d=31-ord(i)
+            rlist.append(chr(0+d))
+        elif ord(i)>=32 and ord(i)<=64:
+            d=64-ord(i)
+            rlist.append(chr(32+d))
+        elif ord(i)>=65 and ord(i)<=90:
+            d=90-ord(i)
+            rlist.append(chr(65+d))
+        elif ord(i)>=91 and ord(i)<=96:
+            d=96-ord(i)
+            rlist.append(chr(91+d))
+        elif ord(i)>=123 and ord(i)<=126 :
+            d=126-ord(i)
+            rlist.append(chr(123+d))
+        elif ord(i)>=128 and ord(i)<=255 :
+            d=255-ord(i)
+            rlist.append(chr(128+d))
+
+
+    rdl=len(rlist)
+    k=open(f_name, 'a')
+    i=0
+    while i<rdl:
+       k.write(str(rlist[i]))
+       i=i+1
+    k.close()
+
+
+def morse_code(ulistm):
+    f_name=input("File name with extension name(.txt) the message is to be saved: ")
+    CODE = {'A': '.-','B': '-...','C': '-.-.','D': '-..','E': '.','F': '..-.','G': '--.','H': '....','I': '..','J': '.---','K': '-.-','L': '.-..','M': '--','N': '-.','O': '---','P': '.--.','Q': '--.-','R': '.-.','S': '...','T': '-','U': '..-','V': '...-','W': '.--','X': '-..-','Y': '-.--','Z': '--..','0': '-----','1': '.----','2': '..---','3': '...--','4': '....-','5': '.....','6': '-....','7': '--...','8': '---..','9': '----.',' ': '@'}
+    mlist=['#m1#']
+    for i in ulistm:
+        #print (CODE[i.upper()])
+        mlist.append(CODE[i.upper()])
+        #print(mlist)
+    rdl=len(mlist)
+    k=open(f_name, 'a')
+    i=0
+    while i<rdl:
+       k.write(str(mlist[i]))
+       k.write('\n')
+       i=i+1
+    k.close()
+
+
+
+
+if __name__=="__main__":
+
+    ulist=[]
+    ulistm=[]
+
+    while 1:
+        print(" a: Alpha reverse")
+        print(' b: Morse Code')
+        print(" x : Exit")
+        ch = input("Enter Choice: ")
+
+
+        if ch == 'a':
+            udata=input("enter the message : ")
+            ulist[1:0]=udata
+            alpha_reverse(ulist)
+
+
+        if ch=='b':
+            udata=input("enter the message (Please use characters from A-Z or 0-9 and blank space. Special characters cannot be converted.):\n")
+            ulistm[1:0]=udata
+            morse_code(ulistm)
+
+        if ch == 'x':
+            print(ch)
+            break
+
+        elif ch!='a' and ch!='b' and ch!='x':
+            print('invalid choice')
+
+