private static IEnumerable <KeyValuePair <string, string> > ReadReverseRdns(X500DistinguishedName name)
{
AsnReader x500NameReader = new AsnReader(name.RawData, AsnEncodingRules.DER);
AsnReader sequenceReader = x500NameReader.ReadSequence();
var rdnReaders = new Stack <AsnReader>();
x500NameReader.ThrowIfNotEmpty();
while (sequenceReader.HasData)
{
rdnReaders.Push(sequenceReader.ReadSetOf());
}
while (rdnReaders.Count > 0)
{
AsnReader rdnReader = rdnReaders.Pop();
while (rdnReader.HasData)
{
AsnReader tavReader = rdnReader.ReadSequence();
string oid = tavReader.ReadObjectIdentifierAsString();
string value = tavReader.ReadDirectoryOrIA5String();
tavReader.ThrowIfNotEmpty();
yield return(new KeyValuePair <string, string>(oid, value));
}
}
}
public void FindByTemplateName(string templateName)
{
FindCore(
cert =>
{
X509Extension ext = FindExtension(cert, Oids.EnrollCertTypeExtension);
if (ext != null)
{
// Try a V1 template structure, just a string:
AsnReader reader = new AsnReader(ext.RawData, AsnEncodingRules.DER);
string decodedName = reader.ReadDirectoryOrIA5String();
reader.ThrowIfNotEmpty();
// If this doesn't match, maybe a V2 template will
if (StringComparer.OrdinalIgnoreCase.Equals(templateName, decodedName))
{
return(true);
}
}
ext = FindExtension(cert, Oids.CertificateTemplate);
if (ext != null)
{
CertificateTemplateAsn template = CertificateTemplateAsn.Decode(ext.RawData, AsnEncodingRules.DER);
if (StringComparer.Ordinal.Equals(templateName, template.TemplateID))
{
return(true);
}
}
return(false);
});
}
private static string X500DistinguishedNameDecode(
byte[] encodedName,
bool printOid,
bool reverse,
bool quoteIfNeeded,
string dnSeparator,
string multiValueSeparator,
bool addTrailingDelimiter)
{
AsnReader x500NameReader = new AsnReader(encodedName, AsnEncodingRules.DER);
AsnReader x500NameSequenceReader = x500NameReader.ReadSequence();
var rdnReaders = new List <AsnReader>();
x500NameReader.ThrowIfNotEmpty();
while (x500NameSequenceReader.HasData)
{
rdnReaders.Add(x500NameSequenceReader.ReadSetOf());
}
// We need to allocate a StringBuilder to hold the data as we're building it, and there's the usual
// arbitrary process of choosing a number that's "big enough" to minimize reallocations without wasting
// too much space in the average case.
//
// So, let's look at an example of what our output might be.
//
// GitHub.com's SSL cert has a "pretty long" subject (partially due to the unknown OIDs):
// businessCategory=Private Organization
// 1.3.6.1.4.1.311.60.2.1.3=US
// 1.3.6.1.4.1.311.60.2.1.2=Delaware
// serialNumber=5157550
// street=548 4th Street
// postalCode=94107
// C=US
// ST=California
// L=San Francisco
// O=GitHub, Inc.
// CN=github.com
//
// Which comes out to 228 characters using OpenSSL's default pretty-print
// (openssl x509 -in github.cer -text -noout)
// Throw in some "maybe-I-need-to-quote-this" quotes, and a couple of extra/extra-long O/OU values
// and round that up to the next programmer number, and you get that 512 should avoid reallocations
// in all but the most dire of cases.
StringBuilder decodedName = new StringBuilder(512);
int entryCount = rdnReaders.Count;
bool printSpacing = false;
for (int i = 0; i < entryCount; i++)
{
int loc = reverse ? entryCount - i - 1 : i;
// RelativeDistinguishedName ::=
// SET SIZE (1..MAX) OF AttributeTypeAndValue
//
// AttributeTypeAndValue::= SEQUENCE {
// type AttributeType,
// value AttributeValue }
//
// AttributeType::= OBJECT IDENTIFIER
//
// AttributeValue ::= ANY-- DEFINED BY AttributeType
if (printSpacing)
{
decodedName.Append(dnSeparator);
}
else
{
printSpacing = true;
}
AsnReader rdnReader = rdnReaders[loc];
bool hadValue = false;
while (rdnReader.HasData)
{
AsnReader tavReader = rdnReader.ReadSequence();
string oid = tavReader.ReadObjectIdentifierAsString();
string attributeValue = tavReader.ReadDirectoryOrIA5String();
tavReader.ThrowIfNotEmpty();
if (hadValue)
{
decodedName.Append(multiValueSeparator);
}
else
{
hadValue = true;
}
if (printOid)
{
AppendOid(decodedName, oid);
}
bool quote = quoteIfNeeded && NeedsQuoting(attributeValue);
if (quote)
{
decodedName.Append('"');
// If the RDN itself had a quote within it, that quote needs to be escaped
// with another quote.
attributeValue = attributeValue.Replace("\"", "\"\"");
}
decodedName.Append(attributeValue);
if (quote)
{
decodedName.Append('"');
}
}
}
if (addTrailingDelimiter && decodedName.Length > 0)
{
decodedName.Append(dnSeparator);
}
return(decodedName.ToString());
}
