openssl_체인인증서_다운로드방법.ipynb

openssl_-_.ipynb

{
  "nbformat": 4,
  "nbformat_minor": 0,
  "metadata": {
    "colab": {
      "provenance": [],
      "authorship_tag": "ABX9TyPd50MAm5YoFX9btB1hKsmm",
      "include_colab_link": true
    },
    "kernelspec": {
      "name": "python3",
      "display_name": "Python 3"
    },
    "language_info": {
      "name": "python"
    }
  },
  "cells": [
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "view-in-github",
        "colab_type": "text"
      },
      "source": [
        "<a href=\"https://colab.research.google.com/gist/tae0y/90739ca07a50db72e344386169f09d8f/openssl_-_.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
      ]
    },
    {
      "cell_type": "markdown",
      "source": [
        "# 인증서 오류는 왜 나고 어떻게 해결해야할까요?"
      ],
      "metadata": {
        "id": "349-xMg7NDpG"
      }
    },
    {
      "cell_type": "markdown",
      "source": [
        "내부망에서 외부구간으로 나가는 구간에 암복호화 장비가 있습니다.  \n",
        "SSL인증서가 적용된 페이지들의 상위 체인인증서가 덮어씌워집니다.  \n",
        "그래서 외부망에서 상위 체인인증서까지 모두 다운받아 임포트해줘야합니다."
      ],
      "metadata": {
        "id": "BfPphbQ4NUjk"
      }
    },
    {
      "cell_type": "markdown",
      "source": [
        "# 아래와 같이 인증서를 다운받습니다"
      ],
      "metadata": {
        "id": "1gVmDgThM-Qw"
      }
    },
    {
      "cell_type": "markdown",
      "source": [
        "인증서는 `-----BEGIN CERTIFICATE-----`부터 `-----END CERTIFICATE-----`까지   \n",
        "복사해서 각각 `cer` 형식의 파일로 저장합니다.  \n",
        "이후 인증서를 임포트해줍니다."
      ],
      "metadata": {
        "id": "QRNzxxnKNquf"
      }
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "h52XI4wkK42L",
        "outputId": "79c9e637-c0bb-4c96-8c8e-0c6cfa35421c"
      },
      "outputs": [
        {
          "output_type": "stream",
          "name": "stdout",
          "text": [
            "verify depth is 5\n",
            "CONNECTED(00000003)\n",
            "depth=2 C = US, ST = New Jersey, L = Jersey City, O = The USERTRUST Network, CN = USERTrust RSA Certification Authority\n",
            "verify return:1\n",
            "depth=1 C = GB, ST = Greater Manchester, L = Salford, O = Sectigo Limited, CN = Sectigo RSA Domain Validation Secure Server CA\n",
            "verify return:1\n",
            "depth=0 CN = *.kosis.kr\n",
            "verify return:1\n",
            "---\n",
            "Certificate chain\n",
            " 0 s:CN = *.kosis.kr\n",
            "   i:C = GB, ST = Greater Manchester, L = Salford, O = Sectigo Limited, CN = Sectigo RSA Domain Validation Secure Server CA\n",
            "   a:PKEY: rsaEncryption, 2048 (bit); sigalg: RSA-SHA256\n",
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            "-----BEGIN CERTIFICATE-----\n",
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            "-----END CERTIFICATE-----\n",
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            "   i:C = US, ST = New Jersey, L = Jersey City, O = The USERTRUST Network, CN = USERTrust RSA Certification Authority\n",
            "   a:PKEY: rsaEncryption, 2048 (bit); sigalg: RSA-SHA384\n",
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            "-----BEGIN CERTIFICATE-----\n",
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            "-----END CERTIFICATE-----\n",
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            "   i:C = GB, ST = Greater Manchester, L = Salford, O = Comodo CA Limited, CN = AAA Certificate Services\n",
            "   a:PKEY: rsaEncryption, 4096 (bit); sigalg: RSA-SHA384\n",
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            "-----BEGIN CERTIFICATE-----\n",
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            "-----END CERTIFICATE-----\n",
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            "   i:C = GB, ST = Greater Manchester, L = Salford, O = Comodo CA Limited, CN = AAA Certificate Services\n",
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            "Rt0vxuBqw8M0Ayx9lt1awg6nCpnBBYurDC/zXDrPbDdVCYfeU0BsWO/8tqtlbgT2\n",
            "G9w84FoVxp7Z8VlIMCFlA2zs6SFz7JsDoeA3raAVGI/6ugLOpyypEBMs1OUIJqsi\n",
            "l2D4kF501KKaU73yqWjgom7C12yxow+ev+to51byrvLjKzg6CYG1a4XXvi3tPxq3\n",
            "smPi9WIsgtRqAEFQ8TmDn5XpNpaYbg==\n",
            "-----END CERTIFICATE-----\n",
            "---\n",
            "Server certificate\n",
            "subject=CN = *.kosis.kr\n",
            "issuer=C = GB, ST = Greater Manchester, L = Salford, O = Sectigo Limited, CN = Sectigo RSA Domain Validation Secure Server CA\n",
            "---\n",
            "No client certificate CA names sent\n",
            "Peer signing digest: SHA256\n",
            "Peer signature type: RSA-PSS\n",
            "Server Temp Key: X25519, 253 bits\n",
            "---\n",
            "SSL handshake has read 6208 bytes and written 390 bytes\n",
            "Verification: OK\n",
            "---\n",
            "New, TLSv1.3, Cipher is TLS_AES_256_GCM_SHA384\n",
            "Server public key is 2048 bit\n",
            "Secure Renegotiation IS NOT supported\n",
            "Compression: NONE\n",
            "Expansion: NONE\n",
            "No ALPN negotiated\n",
            "Early data was not sent\n",
            "Verify return code: 0 (ok)\n",
            "---\n",
            "DONE\n"
          ]
        }
      ],
      "source": [
        "!openssl s_client -showcerts -verify 5 -connect kosis.kr:443 < /dev/null"
      ]
    }
  ]
}