From c11decee92748a7c6ea4294b0954438c6cf5d782 Mon Sep 17 00:00:00 2001
From: Edoardo La Greca
Date: Sat, 2 Aug 2025 19:08:05 +0200
Subject: add Authenticator, Authenticator9PAnyV2DP9IK (draft),
 FailedAuthenticationException

---
 src/main/kotlin/Authenticator.kt | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 src/main/kotlin/Authenticator.kt

(limited to 'src/main/kotlin/Authenticator.kt')

diff --git a/src/main/kotlin/Authenticator.kt b/src/main/kotlin/Authenticator.kt
new file mode 100644
index 0000000..a146840
--- /dev/null
+++ b/src/main/kotlin/Authenticator.kt
@@ -0,0 +1,18 @@
+/**
+ * The Authenticator interface provides methods for authenticating a user over an established protocol connection.
+ */
+interface Authenticator {
+    /**
+     * Authenticate a user identified by the given [username] and whose authenticity is confirmed by the given
+     * [password]. The authentication protocol can read and write data within the underlying connection using [readFun]
+     * and [writeFun].
+     *
+     * @param username The name the user goes by.
+     * @param password The confirmation of the user's authenticity.
+     * @param readFun A function to read incoming data from the underlying connection.
+     * @param writeFun A function to write outgoing data into the underlying connection.
+     * @throws FailedAuthenticationException if the authentication could not be performed. A human-readable reason for
+     *                                       the failure can be provided if necessary.
+     */
+    fun authenticate(username: String, password: String, readFun: () -> Array<UByte>, writeFun: (b: Array<UByte>) -> Unit)
+}
\ No newline at end of file
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