Password generation in Rust

PasswordGen.ipynb

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   "cell_type": "markdown",
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   "source": [
    "# Rust Password Generator"
   ]
  },
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   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [],
   "source": [
    "// First we create our corpus, or set of characters that will go in our password\n",
    "const PASSWORD_CHARS: &str = \"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789\";\n",
    "\n",
    "// Import the random generator and the interator random extension trait\n",
    ":dep rand\n",
    "extern crate rand;\n",
    "use rand::{seq::IteratorRandom, thread_rng, Rng};\n",
    "\n",
    "// Then we create our password generator\n",
    "fn gen_passwd(len: u16, rng: &mut impl Rng) -> String {\n",
    "    // The password buffer\n",
    "    let mut password = String::new();\n",
    "    \n",
    "    // Loop trough 0 up to our password length\n",
    "    for _ in 0..len {\n",
    "        // Add a character\n",
    "        password.push(\n",
    "            PASSWORD_CHARS // Out of our password character list\n",
    "                .chars() // As an iterator over the characters\n",
    "                .choose(rng) // This choose method comes form the `rand::seq::IteratorRandom` import\n",
    "                .expect(\"Empty iterator for password chars\"), // Expect won't fail unless our corpus was empty\n",
    "        );\n",
    "    }\n",
    "    \n",
    "    password\n",
    "}"
   ]
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   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [],
   "source": [
    "// To use our function we have to first create a random generator\n",
    "let mut rng = thread_rng();"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "\"owrYciSdFriwSDn9O0BouigTD1fORmWG\""
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "// Then we can generate random numbers!\n",
    "gen_passwd(32, &mut rng)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "\"s04qoXRqHOoL\""
      ]
     },
     "execution_count": 11,
     "metadata": {},
     "output_type": "execute_result"
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   ],
   "source": [
    "gen_passwd(12, &mut rng)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "\"KIazGvnqcUgxCYF91rbuGPapoN4uhFykI2E9IKl4wi6QFNlOFCV8CsaKdCyi7T0i2KmiXX0EfkjUPMXpGXBRgzCoPVPmxKAXeUHfOhOrHspDNNBcalQy6KYljr80\""
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "gen_passwd(124, &mut rng)"
   ]
  }
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