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using System;
namespace Org.BouncyCastle.Asn1.X509
{
/**
* The object that contains the public key stored in a certficate.
* <p>
* The GetEncoded() method in the public keys in the JCE produces a DER
* encoded one of these.</p>
*/
public class SubjectPublicKeyInfo
: Asn1Encodable
{
public static SubjectPublicKeyInfo GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is SubjectPublicKeyInfo subjectPublicKeyInfo)
return subjectPublicKeyInfo;
return new SubjectPublicKeyInfo(Asn1Sequence.GetInstance(obj));
}
public static SubjectPublicKeyInfo GetInstance(Asn1TaggedObject obj, bool explicitly)
{
return new SubjectPublicKeyInfo(Asn1Sequence.GetInstance(obj, explicitly));
}
private readonly AlgorithmIdentifier m_algID;
private readonly DerBitString m_keyData;
public SubjectPublicKeyInfo(AlgorithmIdentifier algID, DerBitString publicKey)
{
m_algID = algID;
m_keyData = publicKey;
}
public SubjectPublicKeyInfo(AlgorithmIdentifier algID, Asn1Encodable publicKey)
{
m_algID = algID;
m_keyData = new DerBitString(publicKey);
}
public SubjectPublicKeyInfo(AlgorithmIdentifier algID, byte[] publicKey)
{
m_algID = algID;
m_keyData = new DerBitString(publicKey);
}
#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER
public SubjectPublicKeyInfo(AlgorithmIdentifier algID, ReadOnlySpan<byte> publicKey)
{
m_algID = algID;
m_keyData = new DerBitString(publicKey);
}
#endif
private SubjectPublicKeyInfo(Asn1Sequence seq)
{
if (seq.Count != 2)
throw new ArgumentException("Bad sequence size: " + seq.Count, "seq");
m_algID = AlgorithmIdentifier.GetInstance(seq[0]);
m_keyData = DerBitString.GetInstance(seq[1]);
}
public AlgorithmIdentifier AlgorithmID => m_algID;
/**
* for when the public key is an encoded object - if the bitstring
* can't be decoded this routine raises an IOException.
*
* @exception IOException - if the bit string doesn't represent a Der
* encoded object.
*/
public Asn1Object ParsePublicKey() => Asn1Object.FromByteArray(m_keyData.GetOctets());
/**
* for when the public key is raw bits...
*/
public DerBitString PublicKeyData => m_keyData;
/**
* Produce an object suitable for an Asn1OutputStream.
* <pre>
* SubjectPublicKeyInfo ::= Sequence {
* algorithm AlgorithmIdentifier,
* publicKey BIT STRING }
* </pre>
*/
public override Asn1Object ToAsn1Object() => new DerSequence(m_algID, m_keyData);
}
}
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