Added function to generate 48 bit keys

Author: BProg

src/main.rs

@@ -83,5 +83,17 @@ const PC2 : [u8; 48] =
 
 
 pub fn key_kn_from_pair(left: i64, right: i64) -> i64 {
-    0
+    let combined = ((left << 28) | right) << 8;
+    let mut encrypted_key = 0i64;
+    for idx in 0..48 {
+        let combined_bit_at_position = (combined >> (64 - PC2[idx])) & 1;
+        encrypted_key = encrypted_key << 1;
+        encrypted_key = encrypted_key | combined_bit_at_position;
+    }
+    encrypted_key
+}
+
+
+pub fn convert_pairs_to_encrypted_48_bit_keys(pairs: Vec<(i64, i64)>) -> Vec<i64> {
+    Vec::new()
 }

src/main_tests.rs

@@ -94,9 +94,18 @@ fn generate_key_plus_based_on_pc1_table() {
 }
 
 #[test]
-fn creating_key_based_on_paris_and_PC2_table() {
+fn creating_key_based_on_pairs_and_PC2_table() {
     let left = 0b1110000110011001010101011111;
     let right = 0b1010101011001100111100011110;
     let expected_key = 0b000110110000001011101111111111000111000001110010;
     assert_eq!(expected_key, key_kn_from_pair(left, right));
 }
+
+
+#[test]
+fn creating_48_bit_key_based_on_maximum_pairs() {
+    let left = 0b1111_1111_1111_1111_1111_1111_1111;
+    let right = 0b1111_1111_1111_1111_1111_1111_1111;
+    let expected = 0b1111_1111_1111_1111_1111_1111_1111_1111_1111_1111_1111_1111;
+    assert_eq!(expected, key_kn_from_pair(left, right));
+}