Class AttachmentCrypto

Encryption of attachments in encrypted rooms: AES-256-CTR, then SHA-256 of the ciphertext.

Inheritance
object
AttachmentCrypto
Inherited Members
Namespace: Uniform.Matrix.Protocol.Crypto
Assembly: Uniform.Matrix.Protocol.Crypto.dll
Syntax
public static class AttachmentCrypto

Methods

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Decrypt(ReadOnlySpan<byte>, AttachmentKeys)

Check the hash, then decrypt; throw CryptographicException when the file was changed.

Declaration
public static byte[] Decrypt(ReadOnlySpan<byte> ciphertext, AttachmentKeys keys)
Parameters
Type Name Description
ReadOnlySpan<byte> ciphertext
AttachmentKeys keys
Returns
Type Description
byte[]
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Encrypt(ReadOnlySpan<byte>)

Encrypt a file; upload the ciphertext as application/octet-stream and send the keys in the message.

Declaration
public static (byte[] Ciphertext, AttachmentKeys Keys) Encrypt(ReadOnlySpan<byte> plaintext)
Parameters
Type Name Description
ReadOnlySpan<byte> plaintext
Returns
Type Description
(byte[] Ciphertext, AttachmentKeys Keys)