public static void ImportEncryptedPem <TPass>(
ReadOnlySpan <char> input,
ReadOnlySpan <TPass> password,
ImportEncryptedKeyAction <TPass> importAction)
{
bool foundEncryptedPem = false;
PemFields foundFields = default;
ReadOnlySpan <char> foundSlice = default;
ReadOnlySpan <char> pem = input;
while (PemEncoding.TryFind(pem, out PemFields fields))
{
ReadOnlySpan <char> label = pem[fields.Label];
if (label.SequenceEqual(PemLabels.EncryptedPkcs8PrivateKey))
{
if (foundEncryptedPem)
{
throw new ArgumentException(SR.Argument_PemImport_AmbiguousPem, nameof(input));
}
foundEncryptedPem = true;
foundFields = fields;
foundSlice = pem;
}
Index offset = fields.Location.End;
pem = pem[offset..];
protected override PemFields FindPem(ReadOnlySpan <char> input)
{
bool found = PemEncoding.TryFind(input, out PemFields fields);
Assert.True(found, "Did not find PEM.");
return(fields);
}
private static byte[] DecodePemData(ReadOnlySpan <char> pemData)
{
PemEncoding.TryFind(pemData, out PemFields fields);
byte[] decodedData = new byte[fields.DecodedDataLength];
if (!Convert.TryFromBase64Chars(pemData[fields.Base64Data], decodedData, out _))
{
throw new Exception("Error decoding pem data");
}
return(decodedData);
}
protected override void AssertNoPemFound(ReadOnlySpan <char> input)
{
bool found = PemEncoding.TryFind(input, out _);
Assert.False(found, "Found PEM when not expected");
}