Create encrypt.py

encrypt.py

@@ -0,0 +1,205 @@
+from Crypto.PublicKey import RSA
+from Crypto.Random import get_random_bytes
+from Crypto.Cipher import AES, PKCS1_OAEP
+from Crypto.Hash import RIPEMD160, SHA256
+import base58
+import base64
+import cv2
+import numpy as np
+import os
+import uuid 
+import qrcode as qr 
+import math
+from PIL import ImageFont, ImageDraw, Image
+
+def process(img,font_text,font_fac,font_x,font_y,font_col,font_op):
+    img.save('tmp.png')
+    img = Image.open('tmp.png').convert("RGBA") 
+    im=img
+    txt = Image.new('RGBA', im.size, (255,255,255,0))
+    w, h = im.size
+    h1 = font_col.strip("#")
+    rgb_tup = tuple(int(h1[i:i+2], 16) for i in (0, 2, 4))
+    a,b,c = rgb_tup
+    t_fill = (a,b,c,font_op)
+    x = int(font_x)
+    y = int(font_y)
+    draw = ImageDraw.Draw(txt)
+    text = f'{font_text}'
+    font_size=font_fac
+    font = ImageFont.truetype("./fonts/SansitaOne.ttf", int(font_size))
+    size = font.getsize(text)
+    draw.text((x-size[0]/2, y),text, font = font, fill=t_fill)
+    combined = Image.alpha_composite(im, txt)    
+    return combined
+    
+def textover(im,txt1="",txt2=""):
+    im = Image.open(im)
+    inp=1
+    hh=0
+    hhh=25
+    cnt = inp
+    font_a = 30
+    font_b = 10
+    if cnt >0:
+        font_a = font_a + (cnt * 2)
+        font_b = font_b + (cnt * 2)
+        #hh = hh-int(cnt/2)
+        hhh = hhh+int(cnt/2)
+    w,h = im.size
+    print (w)
+    print (h)
+    font_x = (w/2)
+    font_y = h-hhh
+    out = process(im,txt1,font_fac=font_a,font_x=font_x,font_y=hh,font_col="#000000",font_op=255)
+    out = process(out,txt2,font_fac=font_b,font_x=font_x,font_y=font_y,font_col="#000000",font_op=255)
+    return out
+
+def make_qr(txt=None,color_f=None,color_b=None):
+    qrm = qr.QRCode(box_size=10,error_correction=qr.constants.ERROR_CORRECT_H)
+    if color_f == None:
+        color_f = "#000"
+    if color_b == None:
+        color_b = "#fff"
+    if txt != None and txt != "" and data == None:
+        out = f'{txt}'
+        print (f'txt {out}')
+        qrm.add_data(out)
+        qrm.make(fit=True)
+        img1 = qrm.make_image(fill_color=color_f, back_color=color_b)
+        img1.save("im2.png")
+        return "im2.png"  
+
+def to_bin(data):
+    """Convert `data` to binary format as string"""
+    if isinstance(data, str):
+        return ''.join([ format(ord(i), "08b") for i in data ])
+    elif isinstance(data, bytes):
+        return ''.join([ format(i, "08b") for i in data ])
+    elif isinstance(data, np.ndarray):
+        return [ format(i, "08b") for i in data ]
+    elif isinstance(data, int) or isinstance(data, np.uint8):
+        return format(data, "08b")
+    else:
+        raise TypeError("Type not supported.")
+def decode(image_name,txt=None):
+    BGRimage = cv2.imread(image_name)
+    image = cv2.cvtColor(BGRimage, cv2.COLOR_BGR2RGB)   
+    binary_data = ""
+    for row in image:
+        for pixel in row:
+            r, g, b = to_bin(pixel)
+            binary_data += r[-1]
+            binary_data += g[-1]
+            binary_data += b[-1]
+    all_bytes = [ binary_data[i: i+8] for i in range(0, len(binary_data), 8) ]
+    decoded_data = ""
+    for byte in all_bytes:
+        decoded_data += chr(int(byte, 2))
+        if decoded_data[-5:] == "=====":
+            break
+    this = decoded_data[:-5].split("#####",1)[0]
+    this = eval(this)
+    enc_in=this
+    return this
+
+def encode(image_name, secret_data,txt=None):
+    BGRimage = cv2.imread(image_name)
+    image = cv2.cvtColor(BGRimage, cv2.COLOR_BGR2RGB)    
+    n_bytes = image.shape[0] * image.shape[1] * 3 // 8
+    print("[*] Maximum bytes to encode:", n_bytes)
+    secret_data1=secret_data
+    while True:
+        if len(secret_data1)+5 < (n_bytes):
+            secret_data1 = f'{secret_data1}#####'
+        elif len(secret_data1)+5 >= (n_bytes):
+            break    
+    secret_data = secret_data1    
+    if len(secret_data) > n_bytes:
+        return image_name, gr.Markdown.update("""<center><h3>Input image is too large""")
+    secret_data += "====="
+    data_index = 0
+    binary_secret_data = to_bin(secret_data)
+    data_len = len(binary_secret_data)
+    for row in image:
+        for pixel in row:
+            r, g, b = to_bin(pixel)
+            if data_index < data_len:
+                pixel[0] = int(r[:-1] + binary_secret_data[data_index], 2)
+                data_index += 1
+            if data_index < data_len:
+                pixel[1] = int(g[:-1] + binary_secret_data[data_index], 2)
+                data_index += 1
+            if data_index < data_len:
+                pixel[2] = int(b[:-1] + binary_secret_data[data_index], 2)
+                data_index += 1
+            if data_index >= data_len:
+                break
+    return image
+
+def conv_im(im,data):
+    uniqnum = uuid.uuid4()
+    byte_size = len(data)
+    data_pixels = byte_size*4
+    data_sq = int(math.sqrt(data_pixels))
+    data_pad = data_sq+100
+    qr_im = im
+    img1 = Image.open(qr_im)
+    imgw = img1.size[0] 
+    imgh = img1.size[1]
+    if data_pad > imgw or data_pad > imgh :
+        img1 = img1.resize((int(data_pad),int(data_pad)), Image.Resampling.LANCZOS)
+    print (img1.size)
+    img1.save(f'tmpim{uniqnum}.png')
+    with open(f'tmpim{uniqnum}.png', "rb") as image_file:
+        encoded_string = base64.b64encode(image_file.read())
+        image_file.close()
+    im_out = encode(f'tmpim{uniqnum}.png',data)
+    return im_out
+    
+def calculate_hash(data, hash_function: str = "sha256") -> str:
+    if type(data) == str:
+        data = bytearray(data, "utf-8")
+    if hash_function == "sha256":
+        h = SHA256.new()
+        h.update(data)
+        return h.hexdigest()
+    if hash_function == "ripemd160":
+        h = RIPEMD160.new()
+        h.update(data)
+        return h.hexdigest()
+    
+def encrypt_text(data,pub_im,mes_im=None):
+    uniq=uuid.uuid4()
+    pub_key = decode(pub_im)
+    data = data.encode("utf-8")
+    recipient_key = RSA.import_key(pub_key)
+    session_key = get_random_bytes(16)
+    cipher_rsa = PKCS1_OAEP.new(recipient_key)
+    enc_session_key = cipher_rsa.encrypt(session_key)
+    cipher_aes = AES.new(session_key, AES.MODE_EAX)
+    ciphertext, tag = cipher_aes.encrypt_and_digest(data)
+    file_out = open(f"{uniq}encrypted_data.bin", "wb")
+    [ file_out.write(x) for x in (enc_session_key, cipher_aes.nonce, tag, ciphertext) ]
+    file_out.close()
+    doc_name = f"{uniq}encrypted_data.bin"
+    with open(doc_name, "rb") as file:
+        file_data =(file.read())
+        #print (f'file_data::{file_data}')
+    if mes_im == None:
+        qr_link="test"
+        #trans_im1.save("trans_im.png")
+        hash_1 = calculate_hash(pub_key, hash_function="sha256")
+        hash_2 = calculate_hash(hash_1, hash_function="ripemd160")
+        address = base58.b58encode(hash_2)    
+        add_label = str(address)
+        add_label = add_label.strip("b").strip("'")  
+        trans_im1=make_qr(txt=address, color_b="#ECFD08")
+        message_im = textover(trans_im1, "Message",add_label)
+        message_im.save(f"{uniq}private_key_im.png")
+    else:
+        im_mes=Image.open(mes_im)
+        im_mes.save(f"{uniq}private_key_im.png")
+    enc_qr = conv_im(f"{uniq}private_key_im.png",data=file_data)
+    file.close()
+    return str(file_data),enc_qr