public LicenseBlob TryDeserialize(string license, string licenseSource, bool locallySourced)
{
LicenseBlob blob;
try {
blob = LicenseBlob.Deserialize(license);
} catch (Exception ex) {
AcceptIssue(new Issue("Failed to parse license (from " + licenseSource + "):",
LicenseBlob.TryRedact(license) + "\n" + ex, IssueSeverity.Error));
return(null);
}
if (!blob.VerifySignature(TrustedKeys, null))
{
sink.AcceptIssue(new Issue(
"License " + blob.Fields.Id + " (from " + licenseSource +
") has been corrupted or has not been signed with a matching private key.", IssueSeverity.Error));
return(null);
}
if (locallySourced && blob.Fields.MustBeFetched())
{
sink.AcceptIssue(new Issue(
"This license cannot be installed directly; it must be fetched from a license server",
LicenseBlob.TryRedact(license), IssueSeverity.Error));
return(null);
}
return(blob);
}
static bool Validate(string licenseStr, BigInteger mod, BigInteger exp, StringBuilder log)
{
var blob = LicenseBlob.Deserialize(licenseStr);
log?.AppendLine("---------------------------------------------");
log?.AppendLine("Parsed info: " + blob.Fields);
log?.AppendLine("Plaintext hash: " + BitConverter
.ToString(new SHA512Managed().ComputeHash(blob.Data))
.ToLower()
.Replace("-", ""));
return(blob.VerifySignature(new[] { new RSADecryptPublic(mod, exp) }, log));
}
public static bool Revalidate(this ILicenseBlob b, IEnumerable <RSADecryptPublic> trustedKeys)
{
var ourCopy = LicenseBlob.Deserialize(b.Original);
return(ourCopy.VerifySignature(trustedKeys, null) && ourCopy.Fields.DataMatches(b.Fields));
}