public static bool posPair(int i)
{
if (i < PairList.Instance.pairList.Count)
{
_pair = PairList.Instance.pairList[i];
return(true);
}
else
{
Debug.Log("Error：Over MemberCount");
return(false);
}
}
// Here we have to address the Dart direct methods - to be encapsulated in a class in C#
#region Properties
#endregion
#region Constructors
#endregion
#region Public Methods
/// Transforms [this] document into one having the proper fields encrypted as
/// specified inside the [encryptedData] list.
/// All the fields will be encrypted using the specified [aesKey].
/// This key will later be encrypted for each and every Did specified into
/// the [recipients] list.
/// The overall encrypted data will be put inside the proper document field.
public static async Task <CommercioDoc> encryptField(
CommercioDoc doc,
KeyParameter aesKey,
List <EncryptedData> encryptedData,
List <String> recipients,
Wallet wallet
)
{
// -----------------
// --- Encryption
// -----------------
// Encrypt the contents
String encryptedContentUri = null;
if (encryptedData.Contains(EncryptedData.CONTENT_URI))
{
encryptedContentUri = HexEncDec.ByteArrayToString(EncryptionHelper.encryptStringWithAes(doc.contentUri, aesKey));
}
String encryptedMetadataContentUri = null;
if (encryptedData.Contains(EncryptedData.METADATA_CONTENT_URI))
{
encryptedMetadataContentUri = HexEncDec.ByteArrayToString(EncryptionHelper.encryptStringWithAes(doc.metadata.contentUri, aesKey));
}
String encryptedMetadataSchemaUri = null;
if (encryptedData.Contains(EncryptedData.METADATA_SCHEMA_URI))
{
String schemaUri = doc.metadata.schema?.uri;
if (schemaUri != null)
{
encryptedMetadataSchemaUri = HexEncDec.ByteArrayToString(EncryptionHelper.encryptStringWithAes(schemaUri, aesKey));
}
}
// ---------------------
// --- Keys creation
// ---------------------
// I will trasform all the Dart function instructions in imperative loops
// Get the recipients Did Documents
List <DidDocument> recipientsDidDocs = new List <DidDocument>();
foreach (String recipient in recipients)
{
recipientsDidDocs.Add(await IdHelper.getDidDocument(recipient, wallet));
}
// Get a list of al the Did Documents and the associated encryption key
List <_Pair> keys = new List <_Pair>();
foreach (DidDocument didDoc in recipientsDidDocs)
{
if (didDoc != null)
{
_Pair p = new _Pair(didDoc);
if (p.pubKey != null)
{
keys.Add(p);
}
}
}
// Create the encryption key field
List <CommercioDocEncryptionDataKey> encryptionKeys = new List <CommercioDocEncryptionDataKey>();
foreach (_Pair pair in keys)
{
byte[] encryptedAesKey = EncryptionHelper.encryptBytesWithRsa(
aesKey.GetKey(),
pair.pubKey
);
CommercioDocEncryptionDataKey dataKey = new CommercioDocEncryptionDataKey(
recipientDid: pair.document.id,
value: HexEncDec.ByteArrayToString(encryptedAesKey)
);
encryptionKeys.Add(dataKey);
}
// Copy the metadata
CommercioDocMetadataSchema metadataSchema = doc.metadata?.schema;
if (metadataSchema != null)
{
metadataSchema = new CommercioDocMetadataSchema(
version: metadataSchema.version,
uri: encryptedMetadataSchemaUri ?? metadataSchema.uri
);
}
// Return a copy of the document
return(new CommercioDoc(
senderDid: doc.senderDid,
recipientDids: doc.recipientDids,
uuid: doc.uuid,
checksum: doc.checksum,
contentUri: encryptedContentUri ?? doc.contentUri,
metadata: new CommercioDocMetadata(
contentUri: encryptedMetadataContentUri ?? doc.metadata.contentUri,
schema: metadataSchema,
schemaType: doc.metadata.schemaType
),
encryptionData: new CommercioDocEncryptionData(
keys: encryptionKeys,
encryptedData: encryptedData.Select((e) => e.ToEnumMemberAttrValue()).ToList()
)
));
}
public static void newPair()
{
_pair = new _Pair();
}
// -- function --
public static void initPair()
{
_pair = new _Pair();
}