singWithRsa.ipynb

singWithRsa.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Generovaní podpisu\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "https://www.pycryptodome.org/en/latest/src/signature/pkcs1_v1_5.html?highlight=sign#pkcs-1-v1-5-rsa"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "from Cryptodome.PublicKey import RSA\n",
    "from Cryptodome.Hash import SHA512\n",
    "from Cryptodome.Signature import pkcs1_15\n",
    "\n",
    "import json\n",
    "import base64"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Vstupy"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "načtu si to co chci podepsat - r+b - read as a binary file"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Ja bych ty internety zakazala.\n"
     ]
    }
   ],
   "source": [
    "message = \"Ja bych ty internety zakazala.\"\n",
    "public_key = open('sign_public.pem').read()\n",
    "private_key = open('sign_private.pem').read()\n",
    "\n",
    "print(message)\n",
    "#print(private_key)\n",
    "#print(public_key)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Výpočet"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "spočtu SHA512 zprávy"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "metadata": {},
   "outputs": [],
   "source": [
    "h = SHA512.new(message)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "importuju klíč"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "metadata": {},
   "outputs": [],
   "source": [
    "key = RSA.importKey(private_key, \"aaaa\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "podepíšu hash zprávy ve schématu PKCS#1 v1.5 (RSA) - https://tools.ietf.org/html/rfc8017\n",
    "a vyleze mi podpis v bytes"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 29,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "b'1\\x19a%\\xa5\\xde\\xa4\\xbfp\\xb8\\xc53\\xd6$\\x96@U\\xfd\\x9e\\xc9\\xab\\x89\\xe9\\xe0\\xf7P\\xa2\\xdc\\xab@\\x0f\\xd7\\xaf\\x91\\xca~&\\xc9\\x04Z\\x99B\\xd1\\xd8\\r\\xfe\\x9e\\xbb\\xdb\\xa8\\xa2\\xad\\x99}T\\xf8\\xe1\\\\\\xacu\\xb7\\xed\\xda\\xe8\\xcf \\xbc{\\xf4v\\xffF\\xf7\\x93\\x1b2\\xdbP\\x1a\\xfbNX\\xfe\\xd0\\xda\\xa1\\xd8\\xf4\\xa5\\x0en\\x89\\x98{\\x9a\\xee\\x07c\\x9b\\xdaX*\\xe5\\xee\\xbd\\xbd{\\xb8O9\\x0f\\xf5\\xaf\\xd8\\xf0\\xc7va\\x1c\\x1cb\\xa6\\x84\\x7f\\x99\\xd2i\\xe1\\xa4\\x9f\\xf2u\\xf2ML:\\xf3v\\xd5wS\\xc1\\xa3\\xd9@\\xa0[\\x1dzr\\xf9\\xce\\xb8d\\xed\\xfdQ\\xda\\xdfp\\x07\\x85\\x8d\\x9a\\xd6Eum\\xbb%\\x1b\\x98\\xe45\\t\\xe1\\x9d\\xd8\\xde*\\x87\\xd9\\xb4vp\\xff\"\\x08\\xaf|r\\x06WX\\x90F\\xb2l\\xdf\\x94\\x90\\xd5=%zL\\tF\\xf1A\\xf5\\xb8=.\"\\xcb=\\xffAP\\xd6\\xa9\\xf1Pr\\xcb`\\x80%\\x90\\x8d\\xe9k\"\\xdd\\xb6\\xe57\\xa9y\\x02\\x81\\x17+\\xf6\\x9aA\\xd5\\x1b\\xf5\\x17))d\\x0be,g\\xa8\\xd5\\x18`\\x80/\\xee\\xff\\xf4\\xb6\\xb7\\x80\\x99\\xd2\\xdc [-\\x0ftg\\x9b1\\x8a\\xc0%\\xb3\\x08\\xcc\\xda5 ~\\x9fv*\\xb1\\xc0+ce\\x9eJ\\xf7Js\\xb9\\x90\\xa6\\x19\\xc6kVQf:\\xd8e\\xdb\\xc4;$\\xb2\\xbc\\x8f>@l\\xc4\\x1e!\\x18\\x13a\\xd8\\x92\\xc6\\x0fRv\\xa4\\xe4z\\xbc\\x16eQ\\xd5\\xaa\\r\\xe5\\x03\\x89\\']WF\\xfe\\x8f\\x08ZL?\"Q\\x04\\x86\\x82~\\x84\\x891\"\\xd3\\x91\\xe2A\\x85\\x9c\\xd7+\\x01)`H\\x8aj\\xc4b\\x95\\x9d\\x9a\\xd4\\xd7DZK\\xe2\\xb3\\xb7\\xaf-\\x84\\x08I\\x9b\\xeb\\x1d*i\\xd0\\x9f\\xd2{%\\xb7\\x88F!\\xc8\\xf1{\\xc1\\\\\\x86F#\\x8b\\xd1\\xbc\\x85l0\\xc6\\xa7VoN \\xc6*\\xc7,$\\xf95u\\x1e\\x84%\\x0e\\xbd\\xd6\\x0f\\xe1\\x84\\xea\\xcf\\x90\\xece\\xf1j\\x1elB0\\x99q\\xfcM\\x8b\\x9cHFI\\x90\\xf2\"\\x1aYf\\x83\\xb5\\xb6w\\x8aWO\\xff=d]\\xa1\\t\\xffB)\\t\\xb1IW+\\xc4\\x9b\\x95\\xd1\\x7f]\\x87\\xe9\\x1a\\xb0l'\n"
     ]
    }
   ],
   "source": [
    "sig = pkcs1_15.new(key).sign(h)\n",
    "print(sig)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'31 19 61 25 a5 de a4 bf 70 b8 c5 33 d6 24 96 40 55 fd 9e c9 ab 89 e9 e0 f7 50 a2 dc ab 40 0f d7 af 91 ca 7e 26 c9 04 5a 99 42 d1 d8 0d fe 9e bb db a8 a2 ad 99 7d 54 f8 e1 5c ac 75 b7 ed da e8 cf 20 bc 7b f4 76 ff 46 f7 93 1b 32 db 50 1a fb 4e 58 fe d0 da a1 d8 f4 a5 0e 6e 89 98 7b 9a ee 07 63 9b da 58 2a e5 ee bd bd 7b b8 4f 39 0f f5 af d8 f0 c7 76 61 1c 1c 62 a6 84 7f 99 d2 69 e1 a4 9f f2 75 f2 4d 4c 3a f3 76 d5 77 53 c1 a3 d9 40 a0 5b 1d 7a 72 f9 ce b8 64 ed fd 51 da df 70 07 85 8d 9a d6 45 75 6d bb 25 1b 98 e4 35 09 e1 9d d8 de 2a 87 d9 b4 76 70 ff 22 08 af 7c 72 06 57 58 90 46 b2 6c df 94 90 d5 3d 25 7a 4c 09 46 f1 41 f5 b8 3d 2e 22 cb 3d ff 41 50 d6 a9 f1 50 72 cb 60 80 25 90 8d e9 6b 22 dd b6 e5 37 a9 79 02 81 17 2b f6 9a 41 d5 1b f5 17 29 29 64 0b 65 2c 67 a8 d5 18 60 80 2f ee ff f4 b6 b7 80 99 d2 dc 20 5b 2d 0f 74 67 9b 31 8a c0 25 b3 08 cc da 35 20 7e 9f 76 2a b1 c0 2b 63 65 9e 4a f7 4a 73 b9 90 a6 19 c6 6b 56 51 66 3a d8 65 db c4 3b 24 b2 bc 8f 3e 40 6c c4 1e 21 18 13 61 d8 92 c6 0f 52 76 a4 e4 7a bc 16 65 51 d5 aa 0d e5 03 89 27 5d 57 46 fe 8f 08 5a 4c 3f 22 51 04 86 82 7e 84 89 31 22 d3 91 e2 41 85 9c d7 2b 01 29 60 48 8a 6a c4 62 95 9d 9a d4 d7 44 5a 4b e2 b3 b7 af 2d 84 08 49 9b eb 1d 2a 69 d0 9f d2 7b 25 b7 88 46 21 c8 f1 7b c1 5c 86 46 23 8b d1 bc 85 6c 30 c6 a7 56 6f 4e 20 c6 2a c7 2c 24 f9 35 75 1e 84 25 0e bd d6 0f e1 84 ea cf 90 ec 65 f1 6a 1e 6c 42 30 99 71 fc 4d 8b 9c 48 46 49 90 f2 22 1a 59 66 83 b5 b6 77 8a 57 4f ff 3d 64 5d a1 09 ff 42 29 09 b1 49 57 2b c4 9b 95 d1 7f 5d 87 e9 1a b0 6c'"
      ]
     },
     "execution_count": 30,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "sig.hex(\" \")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "b'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'\n"
     ]
    }
   ],
   "source": [
    "sigB64 = base64.b64encode(sig)\n",
    "print(sigB64)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Verifikování podpisu"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "načtu veřejný klíč\n",
    "spočtu hash \n",
    "a porovnám"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 32,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "The signature is valid.\n"
     ]
    }
   ],
   "source": [
    "key = RSA.import_key(public_key)\n",
    "h = SHA512.new(message)\n",
    "try:\n",
    "    pkcs1_15.new(key).verify(h, sig)\n",
    "    print(\"The signature is valid.\")\n",
    "except (ValueError, TypeError):\n",
    "    print (\"The signature is not valid.\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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