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#1 Posted : Thursday, August 10, 2023 4:38:16 AM(UTC)

Rank: Newbie

Groups: Registered
Joined: 8/10/2023(UTC)
Posts: 1
Location: Zoetermeer

I have created a test application based on the example https://www.emailarchite...-service-account-example

I have created both a json type private key and a p12 private key. The example uses the p12 key. When using this I can succesfully authenticate. However when I use the private key from the json file I can not. The reason is that the signature remains empty when calculating this using jwt.SignRs256WithPrivateKey(privateKey, header + '.' + playload)

To use the json private key I have modified the GenerateRequestData method (see the above mentioned example page ) in the following way:

<code snippet>

// load service account certificate to sign request data
// pfxPath := 'C:\test\myservice.p12';
// cert.LoadFromFile(pfxPath, 'notasecret', CRYPT_USER_KEYSET);
// signature := jwt.SignRs256(cert.DefaultInterface, header + '.' + playload);

JSONText := TFile.ReadAllText('C:\test\myservice.json');
JSONValue := TJSONObject.ParseJSONValue(JSONText);

if JSONValue is TJSONObject then
JSONObject := TJSONObject(JSONValue);

if JSONObject.TryGetValue<WideString>('private_key', privateKey) then
memoLog.Lines.Add('private_key found')
memoLog.Lines.Add('private_key property not found in the JSON.');
memoLog.Lines.Add('Invalid JSON format.');

signature := jwt.SignRs256WithPrivateKey(privateKey, header + '.' + playload);

</code snippet>

both de myservice.p12 and de myservice.json are created as descibed in section 'Enable “Domain-wide delegation” and create service key' of the above mentioned example page.

p.s I added the following vars to the var section of the GenerateRequestData method:

JSONText: string;
JSONObject: TJSONObject;
JSONValue: TJSONValue;

I also added the following uses to the uses section:

System.JSON, IOUtils

What am I doing wrong i.e. why is de signature not correctly calculated?

Edited by user Thursday, August 10, 2023 4:46:22 AM(UTC)  | Reason: Added var and uses modifications

#2 Posted : Monday, August 14, 2023 10:50:17 PM(UTC)

Rank: Administration

Groups: Administrators
Joined: 11/11/2010(UTC)
Posts: 1,148

Thanks: 9 times
Was thanked: 54 time(s) in 54 post(s)
Hi, it looks like there is a problem with private key, so the SignRs256WithPrivateKey returns empty string.

The problem was solved by using latest version of EAGetMail.

Edited by user Wednesday, August 16, 2023 2:28:28 AM(UTC)  | Reason: Not specified

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