/**
* Return possible empty collection with recipients matching the passed in RecipientID
*
* @param selector a recipient id to select against.
* @return a collection of RecipientInformation objects.
*/
public ICollection GetRecipients(
RecipientID selector)
{
IList list = (IList)table[selector];
return(list == null?Platform.CreateArrayList() : Platform.CreateArrayList(list));
}
/**
* Return the first RecipientInformation object that matches the
* passed in selector. Null if there are no matches.
*
* @param selector to identify a recipient
* @return a single RecipientInformation object. Null if none matches.
*/
public RecipientInformation GetFirstRecipient(
RecipientID selector)
{
IList list = (IList)table[selector];
return(list == null ? null : (RecipientInformation)list[0]);
}
internal KeyAgreeRecipientInformation(
KeyAgreeRecipientInfo info,
RecipientID rid,
Asn1OctetString encryptedKey,
CmsSecureReadable secureReadable)
: base(info.KeyEncryptionAlgorithm, secureReadable)
{
this.info = info;
this.rid = rid;
this.encryptedKey = encryptedKey;
}
private readonly IDictionary table = Platform.CreateHashtable(); // Hashtable[RecipientID, ArrayList[RecipientInformation]]
public RecipientInformationStore(
ICollection recipientInfos)
{
foreach (RecipientInformation recipientInformation in recipientInfos)
{
RecipientID rid = recipientInformation.RecipientID;
IList list = (IList)table[rid];
if (list == null)
{
table[rid] = list = Platform.CreateArrayList(1);
}
list.Add(recipientInformation);
}
this.all = Platform.CreateArrayList(recipientInfos);
}
public override bool Equals(
object obj)
{
if (obj == this)
{
return(true);
}
RecipientID id = obj as RecipientID;
if (id == null)
{
return(false);
}
return(Arrays.AreEqual(keyIdentifier, id.keyIdentifier) &&
Arrays.AreEqual(SubjectKeyIdentifier, id.SubjectKeyIdentifier) &&
Platform.Equals(SerialNumber, id.SerialNumber) &&
IssuersMatch(Issuer, id.Issuer));
}
internal static void ReadRecipientInfo(IList infos, KeyAgreeRecipientInfo info,
CmsSecureReadable secureReadable)
{
try
{
foreach (Asn1Encodable rek in info.RecipientEncryptedKeys)
{
RecipientEncryptedKey id = RecipientEncryptedKey.GetInstance(rek.ToAsn1Object());
RecipientID rid = new RecipientID();
Asn1.Cms.KeyAgreeRecipientIdentifier karid = id.Identifier;
Asn1.Cms.IssuerAndSerialNumber iAndSN = karid.IssuerAndSerialNumber;
if (iAndSN != null)
{
rid.Issuer = iAndSN.Name;
rid.SerialNumber = iAndSN.SerialNumber.Value;
}
else
{
Asn1.Cms.RecipientKeyIdentifier rKeyID = karid.RKeyID;
// Note: 'date' and 'other' fields of RecipientKeyIdentifier appear to be only informational
rid.SubjectKeyIdentifier = rKeyID.SubjectKeyIdentifier.GetOctets();
}
infos.Add(new KeyAgreeRecipientInformation(info, rid, id.EncryptedKey,
secureReadable));
}
}
catch (IOException e)
{
throw new ArgumentException("invalid rid in KeyAgreeRecipientInformation", e);
}
}
public RecipientInformation this[RecipientID selector]
{
get { return(GetFirstRecipient(selector)); }
}