-
Notifications
You must be signed in to change notification settings - Fork 0
/
RenewSSLCert.cs
67 lines (62 loc) · 3.17 KB
/
RenewSSLCert.cs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
using System;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Host;
using Microsoft.Extensions.Logging;
using Certes;
using Certes.Acme;
using System.Threading.Tasks;
namespace Function
{
public static class RenewSSLCert
{
[FunctionName("RenewSSLCert")]
public static async void Run([TimerTrigger("0 0 0 1 JAN,APR,JUL,OCT *")]TimerInfo myTimer, ILogger log)
{
var domainName = "cityforcity.com";
var connString = Environment.GetEnvironmentVariable("STORAGE_CONN_STRING");
var shareName = "nginx-volume";
var ownerEmail = Environment.GetEnvironmentVariable("OWNER_EMAIL");
var wildcardDomainName = $"*.{domainName}";
var dnsAddr = $"_acme-challenge";
AcmeContext acme = new AcmeContext(WellKnownServers.LetsEncryptV2); // change this for production, using staging to not get blocked
await acme.NewAccount(ownerEmail, true);
var order = await acme.NewOrder(new [] { wildcardDomainName });
var orderUri = order.Location;
var authorization = await order.Authorization(wildcardDomainName);
var dnsChallenge = await authorization.Dns();
var dnsTxt = acme.AccountKey.DnsTxt(dnsChallenge.Token);
try {
AzureHelper.AuthenticateAzure();
var dnsUpdated = AzureHelper.AddTextDnsRecord(domainName, dnsAddr, dnsTxt);
if (!dnsUpdated)
throw new Exception("Failed to update dns record");
// wait for dns change to propogate
await Task.Delay(500);
var validatedChallege = await dnsChallenge.Validate();
var startedValidation = DateTime.Now;
while (validatedChallege.Status != Certes.Acme.Resource.ChallengeStatus.Valid)
{
await Task.Delay(500);
if (DateTime.Now > startedValidation.AddSeconds(300))
throw new Exception("Failed to validate dns record");
validatedChallege = await dnsChallenge.Resource();
}
var dnsRemoved = AzureHelper.RemoveTextDnsRecord(domainName, dnsAddr);
if (!dnsRemoved)
log.LogInformation("Failed to remove DNS record do it manually");
var privateKey = KeyFactory.NewKey(KeyAlgorithm.ES256);
var certinfo = new CsrInfo();
certinfo.CommonName = wildcardDomainName;
var cert = await order.Generate(certinfo, privateKey);
var certUpdated = AzureHelper.WriteStringToAzureFileShare(connString, shareName, "fullchain1.pem", cert.ToPem());
if (!certUpdated)
throw new Exception("Failed to update certificate");
var privKeyUpdated = AzureHelper.WriteStringToAzureFileShare(connString, shareName, "privKey1.pem", privateKey.ToPem());
if (!privKeyUpdated)
throw new Exception("Failed to update private key");
} catch (Exception _) {
log.LogError(_.Message);
}
}
}
}