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using System;
namespace Org.BouncyCastle.Asn1.X509
{
/**
* class for breaking up an X500 Name into it's component tokens, ala
* java.util.StringTokenizer. We need this class as some of the
* lightweight Java environment don't support classes like
* StringTokenizer.
*/
public class X509NameTokenizer
{
private readonly string m_value;
private readonly char m_separator;
private int m_index;
public X509NameTokenizer(string oid)
: this(oid, ',')
{
}
public X509NameTokenizer(string oid, char separator)
{
if (oid == null)
throw new ArgumentNullException(nameof(oid));
if (separator == '"' || separator == '\\')
throw new ArgumentException("reserved separator character", nameof(separator));
m_value = oid;
m_separator = separator;
m_index = oid.Length < 1 ? 0 : -1;
}
public bool HasMoreTokens() => m_index < m_value.Length;
public string NextToken()
{
if (m_index >= m_value.Length)
return null;
bool quoted = false;
bool escaped = false;
int beginIndex = m_index + 1;
while (++m_index < m_value.Length)
{
char c = m_value[m_index];
if (escaped)
{
escaped = false;
}
else if (c == '"')
{
quoted = !quoted;
}
else if (quoted)
{
}
else if (c == '\\')
{
escaped = true;
}
else if (c == m_separator)
{
// TODO[api] The Trim() is for backward compatibility; remove on transition to X500NameTokenizer
return m_value.Substring(beginIndex, m_index - beginIndex).Trim();
}
}
if (escaped || quoted)
throw new ArgumentException("badly formatted directory string");
// TODO[api] The Trim() is for backward compatibility; remove on transition to X500NameTokenizer
return m_value.Substring(beginIndex, m_index - beginIndex).Trim();
}
}
}
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