/// <summary>
/// CertificatePart constructor
/// </summary>
internal CertificatePart(System.IO.Packaging.Package container, Uri partName)
{
if (container == null)
{
throw new ArgumentNullException("container");
}
if (partName == null)
{
throw new ArgumentNullException("partName");
}
partName = PackUriHelper.ValidatePartUri(partName);
// create if not found
if (container.PartExists(partName))
{
// open the part
_part = container.GetPart(partName);
// ensure the part is of the expected type
if (_part.ValidatedContentType().AreTypeAndSubTypeEqual(_certificatePartContentType) == false)
{
throw new FileFormatException(SR.CertificatePartContentTypeMismatch);
}
}
else
{
// create the part
_part = container.CreatePart(partName, _certificatePartContentType.ToString());
}
}
private static Uri ParsePartUriAttribute(String attrValue, out ContentType contentType)
{
// extract the query portion - do not ask the Uri class for it because it will escape
// characters and we want to do a simple text comparison later
contentType = ContentType.Empty; // out argument must always be set
int index = attrValue.IndexOf('?');
Uri uri = null;
if (index > 0)
{
try
{
// ensure it starts with the correct query prefix
String query = attrValue.Substring(index);
if ((query.Length > _contentTypeQueryStringPrefix.Length) && (query.StartsWith(_contentTypeQueryStringPrefix, StringComparison.Ordinal)))
{
// truncate the prefix and validate
contentType = new ContentType(query.Substring(_contentTypeQueryStringPrefix.Length));
}
// now construct the uri without the query
uri = PackUriHelper.ValidatePartUri(new Uri(attrValue.Substring(0, index), UriKind.Relative));
}
catch (ArgumentException ae)
{
// Content type or part uri is malformed so we have a bad signature.
// Rethrow as XmlException so outer validation loop can catch it and return validation result.
throw new XmlException(SR.Get(SRID.PartReferenceUriMalformed), ae);
}
}
// throw if we failed
if (contentType.ToString().Length <= 0)
{
throw new XmlException(SR.Get(SRID.PartReferenceUriMalformed));
}
return(uri);
}