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SSL Error calling a SOAP WebService with selfsigned certificate from AL

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Posted on by JJMc

286

Good morning all.

With this program:

page 50110 pruebas
{
PageType = Card;
ApplicationArea = All;
UsageCategory = Administration;
Caption = 'Pruebas Tesoralia';
layout
{
area(Content)
{
group(GroupName)
{
field(Url; gUrl)
{
ApplicationArea = All;
Caption = 'URL';
}
field(user;gUser)
{
ApplicationArea = All;
Caption = 'User';
}
field(pass;gPass)
{
ApplicationArea = All;
Caption = 'Pass';
}
}
}
}

actions
{
    area(Processing)
    {
        action(getToken03)
        {
            ApplicationArea = All;
            trigger OnAction()
            var
                client: HttpClient;
                content: HttpContent;
                response: HttpResponseMessage;
                headers: HttpHeaders;
                request: HttpRequestMessage;
                respuesta: Text;
            begin
                client.DefaultRequestHeaders.Add('SOAPAction', 'Login');
                content.WriteFrom(composeBody());
                content.GetHeaders(headers);
                headers.Remove('Content-Type');
                headers.Add('Content-Type', 'application/soap+xml; charset="utf-8"');
                request.Method := 'POST';
                request.SetRequestUri(gUrl);
                request.Content := content;
                if not client.Send(request, response) then
                    Error('Error en POST: %1', GetLastErrorText());
                if not response.IsSuccessStatusCode then
                    Error('%1:%2', response.HttpStatusCode, response.ReasonPhrase);
                response.Content.ReadAs(respuesta);
                Message(respuesta);
            end;
        }
    }
}
var
    gRestClient: Codeunit "Rest Client";
    gUrl: Text;
    gUser: Text;
    gPass: Text;

trigger OnOpenPage()
begin
    gUrl := 'https://api.tesoralia.com/FinancialOnline/Financial.svc';
    gUser := 'UserTest';
    gPass := 'PasswordTest';
end;

local procedure composeBody(): Text
var
    tb: TextBuilder;
begin
    tb.AppendLine('<Envelope xmlns="http://www.w3.org/2003/05/soap-envelope">');
    tb.AppendLine('  <Body>');
    tb.AppendLine('    <Login xmlns="http://Tesoralia/Services/Financial/1.0">');
    tb.AppendLine('      <request>');
    tb.AppendLine('        <Login>' + gUser + '</Login>');
    tb.AppendLine('        <Password>' + gPass + '</Password>');
    tb.AppendLine('      </request>');
    tb.AppendLine('    </Login>');
    tb.AppendLine('  </Body>');
    tb.AppendLine('</Envelope>');
    exit(tb.ToText());
end;

}

When executing the action GetToken3 regardles the user and password are correct or not, in OnPrem I get this error:

The SSL connection could not be established, see inner exception.
The remote certificate is invalid because of errors in the certificate chain: RevocationStatusUnknown, PartialChain, OfflineRevocation

In a SaaS environment it works properly

Thank you ever so much

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Business Central

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VS-28080459-0 18 on at

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SSL Error calling a SOAP WebService with selfsigned certificate from AL

Instead, you can handle SSL certificate validation differently. Here are a few alternative approaches:

Install the Certificate: Ensure the self-signed certificate is installed in the Trusted Root Certification Authorities store on the machine where the code is running.

Use a Trusted Certificate: If possible, use a certificate issued by a trusted Certificate Authority (CA) to avoid these issues.

Bypass SSL Validation: While not recommended for production, you can bypass SSL validation by configuring the HttpClient to ignore SSL errors. However, since AL doesn’t support ServerCertificateCustomValidationCallback, you might need to handle this differently, such as configuring the environment to trust the certificate.

Custom AL Code: You might need to write custom AL code to handle the SSL validation. Unfortunately, AL doesn’t provide a direct way to bypass SSL validation like some other languages.

Proxy Server: Use a proxy server that handles SSL termination. The proxy server can handle the SSL certificate validation, and your AL code can communicate with the proxy server over HTTP.
JJMc 286 on at

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SSL Error calling a SOAP WebService with selfsigned certificate from AL

VS-28080459-0:

client.ServerCertificateCustomValidationCallback := (sender, cert, chain, sslPolicyErrors) => true;

The previous line does not exist in AL
Suggested answer

VS-28080459-0 18 on at

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SSL Error calling a SOAP WebService with selfsigned certificate from AL

Install the Self-Signed Certificate:
Ensure that the self-signed certificate is installed in the Trusted Root Certification Authorities store on the machine where the code is running. This can help the system recognize the certificate as trusted.

Bypass SSL Validation:
While not recommended for production environments due to security risks, you can bypass SSL validation for testing purposes. In AL, you can use the HttpClient to ignore SSL errors by setting the ServerCertificateCustomValidationCallback property.
Here’s an example of how you might modify your code to bypass SSL validation:

client := HttpClient.Create();
client.DefaultRequestHeaders.Add('SOAPAction', 'Login');
client.ServerCertificateCustomValidationCallback := (sender, cert, chain, sslPolicyErrors) => true;
content.WriteFrom(composeBody());
content.GetHeaders(headers);
headers.Remove('Content-Type');
headers.Add('Content-Type', 'application/soap+xml; charset="utf-8"');
request.Method := 'POST';
request.SetRequestUri(gUrl);
request.Content := content;
if not client.Send(request, response) then
Error('Error en POST: %1', GetLastErrorText());
if not response.IsSuccessStatusCode then
Error('%1:%2', response.HttpStatusCode, response.ReasonPhrase);
response.Content.ReadAs(respuesta);
Message(respuesta);

Check Certificate Chain:
Ensure that the entire certificate chain is available and trusted. Sometimes intermediate certificates are missing, which can cause validation issues.

Revocation Check:
The error mentions RevocationStatusUnknown and OfflineRevocation. Ensure that the machine can access the Certificate Revocation List (CRL) endpoints. If the machine is offline or cannot reach these endpoints, it might fail the revocation check.

Use a Valid Certificate:
If possible, use a certificate issued by a trusted Certificate Authority (CA) instead of a self-signed certificate. This can avoid many of these issues.
gdrenteria 11,980 Most Valuable Professional on at

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SSL Error calling a SOAP WebService with selfsigned certificate from AL

Hi

I hope this can help you Error: The SSL connection could not be established, see inner exception. The remote certificate is invalid because of errors in the certificate chain: RevocationStatusUnknown, OfflineRevocation · Issue #7618 · microsoft/AL · GitHub

Best

GR

SSL Error calling a SOAP WebService with selfsigned certificate from AL

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