具有azurewebsites.net域的Identityserver4-如何获取SSL指纹

问题描述

我想将身份服务器4托管在azurewebsites.net https上，但是我不确定如何找到我的someapp.azurewebsites.net子域的ssl证书，因此可以将其用作指纹吗?甚至有可能获得在azurewebsites.net子域上的Web应用程序上运行的ssl证书吗?

I want to host identity server 4 on azurewebsites.net https but I am not sure how to find ssl certificate of my someapp.azurewebsites.net sub domain so I can use it as thumbprint? Is that even possible to obtain ssl certificate that is running on your webapp on azurewebsites.net subdomain?

推荐答案

使用自签名证书.由于Identity Server仅在内部使用证书，因此它们不是由受信任的CA签名也没关系，因此您无需将其提供给其他人.我将签名证书作为序列化的机密存储在Azure Key Vault中. Key Vault非常便宜，但是您必须缓存结果，但这并不意味着高流量.

Use self-signed certificates. Since Identity Server only uses the certs internally, it doesn't matter that they aren't signed by a trusted CA, you aren't presenting them to others. I store my signing certificates in Azure Key Vault as serialized Secrets. Key Vault is very inexpensive but you have to cache the results, it isn't meant for high traffic.

请记住要在网站，Function App或其他任何正在检索值的站点上启用托管服务标识，并将其添加到具有对Secrets的读取权限的Key Vault SAS列表中.

Remember to enable Managed Service Identity on the website, Function App, or whatever else is retrieving the values, and add those to the Key Vault SAS list with read-access to Secrets.

[CmdletBinding()]
param(
    [Parameter(Mandatory=$true)][string]$password = "",
    [Parameter(Mandatory=$true)][string]$rootDomain = ""
)

$cwd = Convert-Path .
$sCerFile = "$cwd\token_signing.cer"
$sPfxFile = "$cwd\token_signing.pfx"
$vCerFile = "$cwd\token_validation.cer"
$vPfxFile = "$cwd\token_validation.pfx"

# abort if files exist
if((Test-Path($sPfxFile)) -or (Test-Path($sCerFile)) -or (Test-Path($vPfxFile)) -or (Test-Path($vCerFile)))
{
    Write-Warning "Failed, token_signing or token_validation files already exist in current directory."
    Exit
}

function Get-NewCert ([string]$name)
{
    New-SelfSignedCertificate `
        -Subject $rootDomain `
        -DnsName $rootDomain `
        -FriendlyName $name `
        -NotBefore (Get-Date) `
        -NotAfter (Get-Date).AddYears(10) `
        -CertStoreLocation "cert:CurrentUser\My" `
        -KeyAlgorithm RSA `
        -KeyLength 4096 `
        -HashAlgorithm SHA256 `
        -KeyUsage DigitalSignature, KeyEncipherment, DataEncipherment `
        -Type Custom,DocumentEncryptionCert `
        -TextExtension @("2.5.29.37={text}1.3.6.1.5.5.7.3.1")
}

$securePass = ConvertTo-SecureString -String $password -Force -AsPlainText

# token signing certificate
$cert = Get-NewCert("IdentityServer Token Signing Credentials")
$store = 'Cert:\CurrentUser\My\' + ($cert.ThumbPrint)  
Export-PfxCertificate -Cert $store -FilePath $sPfxFile -Password $securePass
Export-Certificate -Cert $store -FilePath $sCerFile
Write-Host "Token-signing thumbprint: " $cert.Thumbprint

# token validation certificate
$cert =  Get-NewCert("IdentityServer Token Validation Credentials")
$store = 'Cert:\CurrentUser\My\' + ($cert.ThumbPrint)  
Export-PfxCertificate -Cert $store -FilePath $vPfxFile -Password $securePass
Export-Certificate -Cert $store -FilePath $vCerFile
Write-Host "Token-validation thumbprint: " $cert.Thumbprint

Powershell:将证书上传到Azure Key Vault

[CmdletBinding()]
param(
    [Parameter(Mandatory=$true)][string]$password = "",
    [Parameter(Mandatory=$true)][string]$pfxFilename = "",
    [Parameter(Mandatory=$true)][string]$keyVaultName = "",
    [Parameter(Mandatory=$true)][string]$secretName = ""
)

$cwd = Convert-Path .
$pfxFile = "$cwd\$pfxFilename.pfx"

# abort when file not found
if(!(Test-Path($pfxFile)))
{
    Write-Warning "Failed, $pfxFilename.pfx not found $cwd"
    Exit
}

# force Azure login, if needed
function CheckLogin
{
    $needLogin = $true
    Try 
    {
        $content = Get-AzureRmContext
        if ($content) 
        {
            $needLogin = ([string]::IsNullOrEmpty($content.Account))
        } 
    } 
    Catch 
    {
        if ($_ -like "*Login-AzureRmAccount to login*") 
        {
            $needLogin = $true
        } 
        else 
        {
            throw
        }
    }

    if ($needLogin)
    {
        Login-AzureRmAccount
    }
}

CheckLogin

# load the PFX
$flag = [System.Security.Cryptography.X509Certificates.X509KeyStorageFlags]::Exportable
$coll = New-Object System.Security.Cryptography.X509Certificates.X509Certificate2Collection 
$coll.Import($pfxFile, $password, $flag)

# export to byte array
$type = [System.Security.Cryptography.X509Certificates.X509ContentType]::Pkcs12
$bytes = $coll.Export($type)

# base64 encode
$base64 = [System.Convert]::ToBase64String($bytes)
$value = ConvertTo-SecureString -String $base64 -AsPlainText –Force

# send it to Azure KeyVault
$type = 'application/x-pkcs12'
Set-AzureKeyVaultSecret -VaultName $keyVaultName -Name $secretName -SecretValue $value -ContentType $type

线程安全的密钥保管库缓存器

public class KeyVaultCache
{
    private KeyVaultClient _KeyVaultClient = null;
    public KeyVaultClient KeyVaultClient
    {
        get
        {
            if(_KeyVaultClient is null)
            {
                var provider = new AzureServiceTokenProvider();
                _KeyVaultClient = new KeyVaultClient(new KeyVaultClient.AuthenticationCallback(provider.KeyVaultTokenCallback));
            }
            return _KeyVaultClient;
        }
    }

    private ConcurrentDictionary<string, string> SecretsCache = new ConcurrentDictionary<string, string>(StringComparer.OrdinalIgnoreCase);
    public async Task<string> GetCachedSecret(string secretName)
    {
        if(!SecretsCache.ContainsKey(secretName))
        {
            var secretBundle = await KeyVaultClient.GetSecretAsync($"{AzureUris.KeyVaultSecrets}{secretName}").ConfigureAwait(false);
            SecretsCache.TryAdd(secretName, secretBundle.Value);
        }
        return SecretsCache.ContainsKey(secretName) ? SecretsCache[secretName] : string.Empty;
    }
}

反序列化证书的恢复

public async Task<X509Certificate2> TokenValidationCertificate() => PfxStringToCert(await cache.GetCachedSecret("x509-token-validation"));
public async Task<X509Certificate2> TokenSigningCertificate() => PfxStringToCert(await cache.GetCachedSecret("x509-token-signing"));

private X509Certificate2 PfxStringToCert(string pfx)
{
    var bytes = Convert.FromBase64String(pfx);
    var coll = new X509Certificate2Collection();
    coll.Import(bytes, null, X509KeyStorageFlags.Exportable);
    return coll[0];
}

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