[CentOS-de] (solution) letzencript challenge schlägt fehl

21 May 2018

      Nur für das Archiv:
die Ursache war ein fehlerhafter Eintrag im DNS für IPv6, der nicht zur Auflösung der IPv4 passte. letzencript bevorzugt IPv6 und tools wie wget curl IPv4. Deshalb war nicht sofort ersichtlich, das der Hostname von letzencript anders aufgelöst wurde, und ins Nirwana führte.
VG
Olaf
...
Olaf Radicke briefkasten@olaf-radicke.de hat am 13. Mai 2018 um 19:12 geschrieben:
Hi!
ich habe eine Domain bei der ich letzencript schon seid geraumer Zeit verwende und mehrmals erneuert habe.
Jetzt wollte ich für eine weiter Domain ein ssl beantragen und es geht ums verrecken nicht (die alte Domain aber schon). Ich benutze den selben Nginx mit fast identischer Config. Aber es will einfach nicht. Ich habe schon duzende Verfahren probiert, aber mir fällt nichts mehr ein was ich noch versuchen kann. Soweit ich sehen kann, scheint das Script gar kein /.well-known/acme-challenge/irgentwas anzulegen. (Sicher bin ich mir aber nicht). Auch eine /etc/letsencrypt/renewal/meine-neue-domain.conf wird nicht erstellt.
Hier mal der Befehl mit Ausgabe. Wird da irgend wir schlau draus, was das Problem ist?
[root@lvps92-51-165-102 opt]# ./certbot-auto certonly --nginx   -d the-independent-friend.de   --debug-challenges -v
Root logging level set at 10
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Requested authenticator nginx and installer nginx
Single candidate plugin: * nginx
Description: Nginx Web Server plugin - Alpha
Interfaces: IAuthenticator, IInstaller, IPlugin
Entry point: nginx = certbot_nginx.configurator:NginxConfigurator
Initialized: <certbot_nginx.configurator.NginxConfigurator object at 0x7effa2425110>
Prep: True
Single candidate plugin: * nginx
Description: Nginx Web Server plugin - Alpha
Interfaces: IAuthenticator, IInstaller, IPlugin
Entry point: nginx = certbot_nginx.configurator:NginxConfigurator
Initialized: <certbot_nginx.configurator.NginxConfigurator object at 0x7effa2425110>
Prep: True
Selected authenticator <certbot_nginx.configurator.NginxConfigurator object at 0x7effa2425110> and installer <certbot_nginx.configurator.NginxConfigurator object at 0x7effa2425110>
Plugins selected: Authenticator nginx, Installer nginx
Picked account: <Account(RegistrationResource(body=Registration(status=None, terms_of_service_agreed=None, contact=(u'mailto:briefkasten@olaf-radicke.de',), agreement=u'https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf', key=JWKRSA(key=<ComparableRSAKey(<cryptography.hazmat.backends.openssl.rsa._RSAPublicKey object at 0x7effa2492650>)>)), uri=u'https://acme-v01.api.letsencrypt.org/acme/reg/2720790', new_authzr_uri=u'https://acme-v01.api.letsencrypt.org/acme/new-authz', terms_of_service=u'https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf'), a102b385331ee92e07dd76a3ad9949e7, Meta(creation_host=u'lvps92-51-165-102.dedicated.hosteurope.de', creation_dt=datetime.datetime(2016, 7, 21, 20, 2, 54, tzinfo=<UTC>)))>
Sending GET request to https://acme-v01.api.letsencrypt.org/directory.
Starting new HTTPS connection (1): acme-v01.api.letsencrypt.org
https://acme-v01.api.letsencrypt.org:443 "GET /directory HTTP/1.1" 200 658
Received response:
HTTP 200
Server: nginx
Content-Type: application/json
Content-Length: 658
Replay-Nonce: scPF6eq5DRG-1_U02Bv7P26qZXH9Kv-5Izt-2bE-xyw
X-Frame-Options: DENY
Strict-Transport-Security: max-age=604800
Expires: Sun, 13 May 2018 16:47:35 GMT
Cache-Control: max-age=0, no-cache, no-store
Pragma: no-cache
Date: Sun, 13 May 2018 16:47:35 GMT
Connection: keep-alive
{
  "b8Dfdcfz_Cg": "https://community.letsencrypt.org/t/adding-random-entries-to-the-directory/3...",
  "key-change": "https://acme-v01.api.letsencrypt.org/acme/key-change",
  "meta": {
    "caaIdentities": [
      "letsencrypt.org"
    ],
    "terms-of-service": "https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf",
    "website": "https://letsencrypt.org"
  },
  "new-authz": "https://acme-v01.api.letsencrypt.org/acme/new-authz",
  "new-cert": "https://acme-v01.api.letsencrypt.org/acme/new-cert",
  "new-reg": "https://acme-v01.api.letsencrypt.org/acme/new-reg",
  "revoke-cert": "https://acme-v01.api.letsencrypt.org/acme/revoke-cert"
}
Obtaining a new certificate
Generating key (2048 bits): /etc/letsencrypt/keys/0036_key-certbot.pem
Creating CSR: /etc/letsencrypt/csr/0036_csr-certbot.pem
Requesting fresh nonce
Sending HEAD request to https://acme-v01.api.letsencrypt.org/acme/new-authz.
https://acme-v01.api.letsencrypt.org:443 "HEAD /acme/new-authz HTTP/1.1" 405 0
Received response:
HTTP 405
Server: nginx
Content-Type: application/problem+json
Content-Length: 91
Allow: POST
Replay-Nonce: p1QD5VPqEyNFDhD2hrIEQTNpEwE8KmqnszeMOxkrs0k
Expires: Sun, 13 May 2018 16:47:35 GMT
Cache-Control: max-age=0, no-cache, no-store
Pragma: no-cache
Date: Sun, 13 May 2018 16:47:35 GMT
Connection: keep-alive
Storing nonce: p1QD5VPqEyNFDhD2hrIEQTNpEwE8KmqnszeMOxkrs0k
JWS payload:
{
  "identifier": {
    "type": "dns", 
    "value": "the-independent-friend.de"
  }, 
  "resource": "new-authz"
}
Sending POST request to https://acme-v01.api.letsencrypt.org/acme/new-authz:
{
  "protected": "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", 
  "payload": "ewogICJpZGVudGlmaWVyIjogewogICAgInR5cGUiOiAiZG5zIiwgCiAgICAidmFsdWUiOiAidGhlLWluZGVwZW5kZW50LWZyaWVuZC5kZSIKICB9LCAKICAicmVzb3VyY2UiOiAibmV3LWF1dGh6Igp9", 
  "signature": "kSQYECBimRW-aA3Ws35yStc9qG1RFB1P_ERwhSU1xY1Zxz6og6BxIfoWOAQuM6eOdE6oB3M5sKsVqwRpXUQOdFn4gtkKCIlAsg17KAQnfajVU49lgMJO7CHv1bgocgJi8yF72NaeGGBcRAQLpmFrogtoUbRgVebIwqs8UFynFEzuxzKgQJG3o52m0SkPbUSL8AP0fQh4grSa9g48Kj7G7P1IhJvl8KZyKQv958MNw-zsHbilIKY5BCuishz43jxO_Kd6BuazJEb4h00lZxSrOztNEQyZD5Q-UfKkCL013vLp_ymGIn9vS6AYFNOrOHFWkrh_pPvnjkop9IeRcPkA_w"
}
https://acme-v01.api.letsencrypt.org:443 "POST /acme/new-authz HTTP/1.1" 201 740
Received response:
HTTP 201
Server: nginx
Content-Type: application/json
Content-Length: 740
Boulder-Requester: 2720790
Link: https://acme-v01.api.letsencrypt.org/acme/new-cert;rel="next"
Location: https://acme-v01.api.letsencrypt.org/acme/authz/A5jz1eGW39Wpa88swZqLrUJT_j_Y...
Replay-Nonce: 8lCAKdYLv4g2fUpDSLW3nA0OEf2qV5gw6yK6H0X02-8
X-Frame-Options: DENY
Strict-Transport-Security: max-age=604800
Expires: Sun, 13 May 2018 16:47:36 GMT
Cache-Control: max-age=0, no-cache, no-store
Pragma: no-cache
Date: Sun, 13 May 2018 16:47:36 GMT
Connection: keep-alive
{
  "identifier": {
    "type": "dns",
    "value": "the-independent-friend.de"
  },
  "status": "pending",
  "expires": "2018-05-20T16:47:35.933817306Z",
  "challenges": [
    {
      "type": "dns-01",
      "status": "pending",
      "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/A5jz1eGW39Wpa88swZqLrUJT...",
      "token": "ae08hjFFIM7eHugIJ7vzTkJg0Qr6jo-rj7IVcwAbXSY"
    },
    {
      "type": "http-01",
      "status": "pending",
      "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/A5jz1eGW39Wpa88swZqLrUJT...",
      "token": "FbNVsWEq8MvoTkeSJWZo_nctQbbhc4PkYNj07jNtwIo"
    }
  ],
  "combinations": [
    [
      0
    ],
    [
      1
    ]
  ]
}
Storing nonce: 8lCAKdYLv4g2fUpDSLW3nA0OEf2qV5gw6yK6H0X02-8
Performing the following challenges:
http-01 challenge for the-independent-friend.de
Creating backup of /etc/nginx/nginx.conf
Creating backup of /etc/nginx/conf.d/reverseproxy.conf
Creating backup of /etc/nginx/mime.types
Creating backup of /etc/nginx/conf.d/tif-static.conf
Writing nginx conf tree to /etc/nginx/nginx.conf:
user  nginx;
worker_processes  2;   # Set to number of CPU cores
error_log  /var/log/nginx/error.log;
pid  /run/nginx.pid;
events {
    worker_connections  1024;
}
http {
include /etc/letsencrypt/le_http_01_cert_challenge.conf;
server_names_hash_bucket_size 128;
  include  /etc/nginx/mime.types;
  default_type  application/ictet-stream;
log_format  main '$remote_addr - $remote_user [$time_local] "$request" '
              '$status $body_bytes_sent "$http_referer" '
              '"$http_user_agent" "$http_x_forwarded_for"';
access_log  /var/log/nginx/access.log  main;
sendfile  on;
keepalive_timeout  65;
include /etc/nginx/conf.d/*.conf;
#  index  index.html index.htm;
}
Writing nginx conf tree to /etc/nginx/conf.d/tif-static.conf:
######### the-independent-friend.de #########
server  {rewrite ^(/.well-known/acme-challenge/.*) $1 break; # managed by Certbot
  # Redirect any port http/80 requests, to https/443 -- generally only matters for internal requests
  listen  80;
  listen [::]:80;
  server_name the-independent-friend.de;

  location ^~ /.well-known/ {
      allow all;
    	root  /srv/nginx/;
  }

  location / {
      root /srv/nginx/tif-static/;
  }

#      return 301 https://$host$request_uri;
location = /.well-known/acme-challenge/FbNVsWEq8MvoTkeSJWZo_nctQbbhc4PkYNj07jNtwIo{default_type text/plain;return 200 FbNVsWEq8MvoTkeSJWZo_nctQbbhc4PkYNj07jNtwIo.guyjIMqLlBKMkBWxCC5P2sjEOlfFfcd_CDLn3Hn4yBk;} # managed by Certbot
}
server {
    listen 443 ssl;
    server_name the-independent-friend.de;
ssl on;

#    ssl_certificate /etc/letsencrypt/live/the-independent-friend.de/cert.pem;
#    ssl_certificate_key /etc/letsencrypt/live/the-independent-friend.de/privkey.pem;
    ssl_certificate /etc/httpd/ssl/the-independent-friend.de.cert.pem;
    ssl_certificate_key /etc/httpd/ssl/the-independent-friend.de.key.pem;
location ^~ /.well-known/ {
    allow all;
  	root  /srv/nginx/;
}

location / {
    root /srv/nginx/tif-static/;
}

}
Waiting for verification...

Challenges loaded. Press continue to submit to CA. Pass "-v" for more info about
challenges.

Press Enter to Continue
JWS payload:
{
  "keyAuthorization": "FbNVsWEq8MvoTkeSJWZo_nctQbbhc4PkYNj07jNtwIo.guyjIMqLlBKMkBWxCC5P2sjEOlfFfcd_CDLn3Hn4yBk", 
  "type": "http-01", 
  "resource": "challenge"
}
Sending POST request to https://acme-v01.api.letsencrypt.org/acme/challenge/A5jz1eGW39Wpa88swZqLrUJT...:
{
  "protected": "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", 
  "payload": "ewogICJrZXlBdXRob3JpemF0aW9uIjogIkZiTlZzV0VxOE12b1RrZVNKV1pvX25jdFFiYmhjNFBrWU5qMDdqTnR3SW8uZ3V5aklNcUxsQktNa0JXeENDNVAyc2pFT2xmRmZjZF9DRExuM0huNHlCayIsIAogICJ0eXBlIjogImh0dHAtMDEiLCAKICAicmVzb3VyY2UiOiAiY2hhbGxlbmdlIgp9", 
  "signature": "g8SxxosLA9MiC2hnWW-Y12HUdFa3v89eP-Z1xud_oGpAcFjKYL5r34-2kIs7e9LOdZ88VVCFbhnLH9ww92pZj6cc1jRXUthKZrQ0StXewplkn_iZRIEK6hZjL1WQxPll15Od4tkz1rG3jzWXhMxZOcE01Symndowq3oUvEzC4JFw0qLBSKoAtmrp3ajSWliSjWwNNlacjAdjwNTUuTA_3p1Fikhba_1vkpkaZNwlpm_xYHVvSrjEhVxZvtGWQwzlLwRyK5-_i4k9s-LlDrWhORvnUq3zMJdVDeVuNQFsfhwf9yV_IdoB7T4AeSNucR61L5Tl0XlnqGGMUOMnsAwYzA"
}
https://acme-v01.api.letsencrypt.org:443 "POST /acme/challenge/A5jz1eGW39Wpa88swZqLrUJT_j_Y5CiUIKJKzF70xzw/4627835641 HTTP/1.1" 202 336
Received response:
HTTP 202
Server: nginx
Content-Type: application/json
Content-Length: 336
Boulder-Requester: 2720790
Link: https://acme-v01.api.letsencrypt.org/acme/authz/A5jz1eGW39Wpa88swZqLrUJT_j_Y5CiUIKJKzF70xzw;rel="up"
Location: https://acme-v01.api.letsencrypt.org/acme/challenge/A5jz1eGW39Wpa88swZqLrUJT...
Replay-Nonce: UmmHdSQGXnZ6GjpfAiRfV16V0oFKqWjcYnN0maz_o3c
Expires: Sun, 13 May 2018 16:47:38 GMT
Cache-Control: max-age=0, no-cache, no-store
Pragma: no-cache
Date: Sun, 13 May 2018 16:47:38 GMT
Connection: keep-alive
{
  "type": "http-01",
  "status": "pending",
  "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/A5jz1eGW39Wpa88swZqLrUJT...",
  "token": "FbNVsWEq8MvoTkeSJWZo_nctQbbhc4PkYNj07jNtwIo",
  "keyAuthorization": "FbNVsWEq8MvoTkeSJWZo_nctQbbhc4PkYNj07jNtwIo.guyjIMqLlBKMkBWxCC5P2sjEOlfFfcd_CDLn3Hn4yBk"
}
Storing nonce: UmmHdSQGXnZ6GjpfAiRfV16V0oFKqWjcYnN0maz_o3c
Sending GET request to https://acme-v01.api.letsencrypt.org/acme/authz/A5jz1eGW39Wpa88swZqLrUJT_j_Y....
https://acme-v01.api.letsencrypt.org:443 "GET /acme/authz/A5jz1eGW39Wpa88swZqLrUJT_j_Y5CiUIKJKzF70xzw HTTP/1.1" 200 1708
Received response:
HTTP 200
Server: nginx
Content-Type: application/json
Content-Length: 1708
Link: https://acme-v01.api.letsencrypt.org/acme/new-cert;rel="next"
Replay-Nonce: 81rSHlqX6nGMdi_MW4pGuccufR8is_8Me4EPooLW-u8
X-Frame-Options: DENY
Strict-Transport-Security: max-age=604800
Expires: Sun, 13 May 2018 16:47:42 GMT
Cache-Control: max-age=0, no-cache, no-store
Pragma: no-cache
Date: Sun, 13 May 2018 16:47:42 GMT
Connection: keep-alive
{
  "identifier": {
    "type": "dns",
    "value": "the-independent-friend.de"
  },
  "status": "invalid",
  "expires": "2018-05-20T16:47:35Z",
  "challenges": [
    {
      "type": "dns-01",
      "status": "invalid",
      "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/A5jz1eGW39Wpa88swZqLrUJT...",
      "token": "ae08hjFFIM7eHugIJ7vzTkJg0Qr6jo-rj7IVcwAbXSY"
    },
    {
      "type": "http-01",
      "status": "invalid",
      "error": {
        "type": "urn:acme:error:unauthorized",
        "detail": "Invalid response from http://the-independent-friend.de/.well-known/acme-challenge/FbNVsWEq8MvoTkeS...: "\u003c!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"\n       "http://www.w3.org/TR/html4/loose.dtd%5C%22%5Cu003e%5Cn%5Cu003chtml%5Cu003e%5...  \u003cm"",
        "status": 403
      },
      "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/A5jz1eGW39Wpa88swZqLrUJT...",
      "token": "FbNVsWEq8MvoTkeSJWZo_nctQbbhc4PkYNj07jNtwIo",
      "keyAuthorization": "FbNVsWEq8MvoTkeSJWZo_nctQbbhc4PkYNj07jNtwIo.guyjIMqLlBKMkBWxCC5P2sjEOlfFfcd_CDLn3Hn4yBk",
      "validationRecord": [
        {
          "url": "http://the-independent-friend.de/.well-known/acme-challenge/FbNVsWEq8MvoTkeS...",
          "hostname": "the-independent-friend.de",
          "port": "80",
          "addressesResolved": [
            "92.51.165.102",
            "2a01:488:42:1000:50ed:8499:db:fa85"
          ],
          "addressUsed": "2a01:488:42:1000:50ed:8499:db:fa85"
        }
      ]
    }
  ],
  "combinations": [
    [
      0
    ],
    [
      1
    ]
  ]
}
Reporting to user: The following errors were reported by the server:
Domain: the-independent-friend.de
Type:   unauthorized
Detail: Invalid response from http://the-independent-friend.de/.well-known/acme-challenge/FbNVsWEq8MvoTkeS...: "<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
       "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
  <m"
To fix these errors, please make sure that your domain name was entered correctly and the DNS A/AAAA record(s) for that domain contain(s) the right IP address.
Encountered exception:
Traceback (most recent call last):
  File "/opt/eff.org/certbot/venv/lib/python2.7/site-packages/certbot/auth_handler.py", line 80, in handle_authorizations
    self._respond(aauthzrs, resp, best_effort)
  File "/opt/eff.org/certbot/venv/lib/python2.7/site-packages/certbot/auth_handler.py", line 153, in _respond
    self._poll_challenges(aauthzrs, chall_update, best_effort)
  File "/opt/eff.org/certbot/venv/lib/python2.7/site-packages/certbot/auth_handler.py", line 224, in _poll_challenges
    raise errors.FailedChallenges(all_failed_achalls)
FailedChallenges: Failed authorization procedure. the-independent-friend.de (http-01): urn:acme:error:unauthorized :: The client lacks sufficient authorization :: Invalid response from http://the-independent-friend.de/.well-known/acme-challenge/FbNVsWEq8MvoTkeS...: "<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
       "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
  <m"
Calling registered functions
Cleaning up challenges
Exiting abnormally:
Traceback (most recent call last):
  File "/opt/eff.org/certbot/venv/bin/letsencrypt", line 11, in <module>
    sys.exit(main())
  File "/opt/eff.org/certbot/venv/lib/python2.7/site-packages/certbot/main.py", line 1315, in main
    return config.func(config, plugins)
  File "/opt/eff.org/certbot/venv/lib/python2.7/site-packages/certbot/main.py", line 1206, in certonly
    lineage = _get_and_save_cert(le_client, config, domains, certname, lineage)
  File "/opt/eff.org/certbot/venv/lib/python2.7/site-packages/certbot/main.py", line 118, in _get_and_save_cert
    lineage = le_client.obtain_and_enroll_certificate(domains, certname)
  File "/opt/eff.org/certbot/venv/lib/python2.7/site-packages/certbot/client.py", line 351, in obtain_and_enroll_certificate
    cert, chain, key, _ = self.obtain_certificate(domains)
  File "/opt/eff.org/certbot/venv/lib/python2.7/site-packages/certbot/client.py", line 294, in obtain_certificate
    orderr = self._get_order_and_authorizations(csr.data, self.config.allow_subset_of_names)
  File "/opt/eff.org/certbot/venv/lib/python2.7/site-packages/certbot/client.py", line 330, in _get_order_and_authorizations
    authzr = self.auth_handler.handle_authorizations(orderr, best_effort)
  File "/opt/eff.org/certbot/venv/lib/python2.7/site-packages/certbot/auth_handler.py", line 80, in handle_authorizations
    self._respond(aauthzrs, resp, best_effort)
  File "/opt/eff.org/certbot/venv/lib/python2.7/site-packages/certbot/auth_handler.py", line 153, in _respond
    self._poll_challenges(aauthzrs, chall_update, best_effort)
  File "/opt/eff.org/certbot/venv/lib/python2.7/site-packages/certbot/auth_handler.py", line 224, in _poll_challenges
    raise errors.FailedChallenges(all_failed_achalls)
FailedChallenges: Failed authorization procedure. the-independent-friend.de (http-01): urn:acme:error:unauthorized :: The client lacks sufficient authorization :: Invalid response from http://the-independent-friend.de/.well-known/acme-challenge/FbNVsWEq8MvoTkeS...: "<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
       "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
  <m"
Failed authorization procedure. the-independent-friend.de (http-01): urn:acme:error:unauthorized :: The client lacks sufficient authorization :: Invalid response from http://the-independent-friend.de/.well-known/acme-challenge/FbNVsWEq8MvoTkeSJWZo_nctQbbhc4PkYNj07jNtwIo: "<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
       "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
  <m"
IMPORTANT NOTES:

The following errors were reported by the server:
Domain: the-independent-friend.de
Type:   unauthorized
Detail: Invalid response from
http://the-independent-friend.de/.well-known/acme-challenge/FbNVsWEq8MvoTkeS...:
"<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
       "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
  <m"
To fix these errors, please make sure that your domain name was
entered correctly and the DNS A/AAAA record(s) for that domain
contain(s) the right IP address.

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[CentOS-de] (solution) letzencript challenge schlägt fehl