PemParser
class PemParser
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Utilities;
using Org.BouncyCastle.Utilities.Encoders;
using System.IO;
using System.Text;
namespace Org.BouncyCastle.X509
{
internal class PemParser
{
private readonly string _header1;
private readonly string _header2;
private readonly string ;
private readonly string ;
internal PemParser(string type)
{
_header1 = "-----BEGIN " + type + "-----";
_header2 = "-----BEGIN X509 " + type + "-----";
_footer1 = "-----END " + type + "-----";
_footer2 = "-----END X509 " + type + "-----";
}
private string ReadLine(Stream inStream)
{
StringBuilder stringBuilder = new StringBuilder();
int num;
while (true) {
if ((num = inStream.ReadByte()) != 13 && num != 10 && num >= 0) {
if (num != 13)
stringBuilder.Append((char)num);
} else if (num < 0 || stringBuilder.Length != 0) {
break;
}
}
if (num < 0)
return null;
return stringBuilder.ToString();
}
internal Asn1Sequence ReadPemObject(Stream inStream)
{
StringBuilder stringBuilder = new StringBuilder();
string source;
while ((source = ReadLine(inStream)) != null && !Platform.StartsWith(source, _header1) && !Platform.StartsWith(source, _header2)) {
}
while ((source = ReadLine(inStream)) != null && !Platform.StartsWith(source, _footer1) && !Platform.StartsWith(source, _footer2)) {
stringBuilder.Append(source);
}
if (stringBuilder.Length != 0) {
Asn1Object asn1Object = Asn1Object.FromByteArray(Base64.Decode(stringBuilder.ToString()));
if (!(asn1Object is Asn1Sequence))
throw new IOException("malformed PEM data encountered");
return (Asn1Sequence)asn1Object;
}
return null;
}
}
}