InvalidSignatureValidationFailure: License signature validation error!

[pankajmcait]

While validating the License, following error is coming out:

InvalidSignatureValidationFailure: License signature validation error! - The license signature and data does not match. This usually happens when a license file is corrupted or has been altered.

Using the following code for validation: string licPath = Server.MapPath("~\LicenseFiles\License.lic"); var keypath = Server.MapPath("~\LicenseFiles\public-key.txt"); string publicKey = System.IO.File.ReadAllText(keypath, System.Text.Encoding.UTF8);

        StringBuilder sb = new StringBuilder();
        using (XmlReader reader = XmlReader.Create(licPath))
        {

            License readLicence = License.Load(reader);
            var validationFailures = readLicence.Validate()
              .ExpirationDate()
                   .When(lic => lic.Type == LicenseType.Trial)
              .And()
              .Signature(publicKey)
              .AssertValidLicense().ToList();

            foreach (var failure in validationFailures)
                sb.Append(failure.GetType().Name + ": " + failure.Message + " - " + failure.HowToResolve);
        }

Can anybody suggest why is this happening? @dnauck

[pankajmcait]

Is there any update from anyone?

[qmfrederik]

Do you always get this error or just intermittently? license.Validate()>Signature(publicKey) is not thread safe, and you may get this errors if you have multiple threads entering this code at the same time.

[pankajmcait]

Always there is error!!

[yolita15]

Do not use that

using (XmlReader reader = XmlReader.Create(licPath))

just pass it as a string :

string reader = File.ReadAllText(licPath);
 License readLicence = License.Load(reader);
            var validationFailures = readLicence.Validate()
              .ExpirationDate()
                   .When(lic => lic.Type == LicenseType.Trial)
              .And()
              .Signature(publicKey)
              .AssertValidLicense().ToList();

            foreach (var failure in validationFailures)
                sb.Append(failure.GetType().Name + ": " + failure.Message + " - " + failure.HowToResolve);`

This should work.

[pankajmcait]

okay, i will try this code and let you know...

On Wed, Dec 13, 2017 at 7:23 PM, Yoanna [email protected] wrote:

Do not use that

using (XmlReader reader = XmlReader.Create(licPath))

just pass it as a string :

`string reader = File.ReadAllText(licPath ); License readLicence = License.Load(reader); var validationFailures = readLicence.Validate() .ExpirationDate() .When(lic => lic.Type == LicenseType.Trial) .And() .Signature(publicKey) .AssertValidLicense().ToList();

    foreach (var failure in validationFailures)
        sb.Append(failure.GetType().Name + ": " + failure.Message + " - " + failure.HowToResolve);`

This should work.

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ThanksPankaj Jain+91 9871844292

[nikro412956]

@pankajmcait well... did it work?