LibCrypto: Add curve X448

1 files changed, 86 insertions, 0 deletions

diff --git a/Tests/LibCrypto/TestCurves.cpp b/Tests/LibCrypto/TestCurves.cpp
index 6356f3f0e7..4017bba52b 100644
--- a/Tests/LibCrypto/TestCurves.cpp
+++ b/Tests/LibCrypto/TestCurves.cpp
@@ -6,6 +6,7 @@
 
 #include <AK/ByteBuffer.h>
 #include <LibCrypto/Curves/X25519.h>
+#include <LibCrypto/Curves/X448.h>
 #include <LibTest/TestCase.h>
 
 TEST_CASE(test_x25519)
@@ -74,3 +75,88 @@ TEST_CASE(test_x25519)
 
     EXPECT_EQ(shared_alice, shared_bob);
 }
+
+TEST_CASE(test_x448)
+{
+    // https://datatracker.ietf.org/doc/html/rfc7748#section-6.1
+    u8 alice_private_key_data[56] {
+        0x9a, 0x8f, 0x49, 0x25, 0xd1, 0x51, 0x9f, 0x57,
+        0x75, 0xcf, 0x46, 0xb0, 0x4b, 0x58, 0x00, 0xd4,
+        0xee, 0x9e, 0xe8, 0xba, 0xe8, 0xbc, 0x55, 0x65,
+        0xd4, 0x98, 0xc2, 0x8d, 0xd9, 0xc9, 0xba, 0xf5,
+        0x74, 0xa9, 0x41, 0x97, 0x44, 0x89, 0x73, 0x91,
+        0x00, 0x63, 0x82, 0xa6, 0xf1, 0x27, 0xab, 0x1d,
+        0x9a, 0xc2, 0xd8, 0xc0, 0xa5, 0x98, 0x72, 0x6b
+    };
+
+    u8 alice_public_key_data[56] {
+        0x9b, 0x08, 0xf7, 0xcc, 0x31, 0xb7, 0xe3, 0xe6,
+        0x7d, 0x22, 0xd5, 0xae, 0xa1, 0x21, 0x07, 0x4a,
+        0x27, 0x3b, 0xd2, 0xb8, 0x3d, 0xe0, 0x9c, 0x63,
+        0xfa, 0xa7, 0x3d, 0x2c, 0x22, 0xc5, 0xd9, 0xbb,
+        0xc8, 0x36, 0x64, 0x72, 0x41, 0xd9, 0x53, 0xd4,
+        0x0c, 0x5b, 0x12, 0xda, 0x88, 0x12, 0x0d, 0x53,
+        0x17, 0x7f, 0x80, 0xe5, 0x32, 0xc4, 0x1f, 0xa0
+    };
+
+    u8 bob_private_key_data[56] {
+        0x1c, 0x30, 0x6a, 0x7a, 0xc2, 0xa0, 0xe2, 0xe0,
+        0x99, 0x0b, 0x29, 0x44, 0x70, 0xcb, 0xa3, 0x39,
+        0xe6, 0x45, 0x37, 0x72, 0xb0, 0x75, 0x81, 0x1d,
+        0x8f, 0xad, 0x0d, 0x1d, 0x69, 0x27, 0xc1, 0x20,
+        0xbb, 0x5e, 0xe8, 0x97, 0x2b, 0x0d, 0x3e, 0x21,
+        0x37, 0x4c, 0x9c, 0x92, 0x1b, 0x09, 0xd1, 0xb0,
+        0x36, 0x6f, 0x10, 0xb6, 0x51, 0x73, 0x99, 0x2d
+    };
+
+    u8 bob_public_key_data[56] {
+        0x3e, 0xb7, 0xa8, 0x29, 0xb0, 0xcd, 0x20, 0xf5,
+        0xbc, 0xfc, 0x0b, 0x59, 0x9b, 0x6f, 0xec, 0xcf,
+        0x6d, 0xa4, 0x62, 0x71, 0x07, 0xbd, 0xb0, 0xd4,
+        0xf3, 0x45, 0xb4, 0x30, 0x27, 0xd8, 0xb9, 0x72,
+        0xfc, 0x3e, 0x34, 0xfb, 0x42, 0x32, 0xa1, 0x3c,
+        0xa7, 0x06, 0xdc, 0xb5, 0x7a, 0xec, 0x3d, 0xae,
+        0x07, 0xbd, 0xc1, 0xc6, 0x7b, 0xf3, 0x36, 0x09
+    };
+
+    u8 shared_secret_data[56] {
+        0x07, 0xff, 0xf4, 0x18, 0x1a, 0xc6, 0xcc, 0x95,
+        0xec, 0x1c, 0x16, 0xa9, 0x4a, 0x0f, 0x74, 0xd1,
+        0x2d, 0xa2, 0x32, 0xce, 0x40, 0xa7, 0x75, 0x52,
+        0x28, 0x1d, 0x28, 0x2b, 0xb6, 0x0c, 0x0b, 0x56,
+        0xfd, 0x24, 0x64, 0xc3, 0x35, 0x54, 0x39, 0x36,
+        0x52, 0x1c, 0x24, 0x40, 0x30, 0x85, 0xd5, 0x9a,
+        0x44, 0x9a, 0x50, 0x37, 0x51, 0x4a, 0x87, 0x9d
+    };
+
+    u8 coordinate_data[56] {
+        0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    };
+
+    ReadonlyBytes coordinate { coordinate_data, 56 };
+    ReadonlyBytes alice_public_key { alice_public_key_data, 56 };
+    ReadonlyBytes alice_private_key { alice_private_key_data, 56 };
+    ReadonlyBytes bob_public_key { bob_public_key_data, 56 };
+    ReadonlyBytes bob_private_key { bob_private_key_data, 56 };
+    ReadonlyBytes shared_secret { shared_secret_data, 56 };
+
+    auto generated_alice_public = MUST(Crypto::Curves::X448::compute_coordinate(alice_private_key, coordinate));
+    EXPECT_EQ(alice_public_key, generated_alice_public);
+
+    auto generated_bob_public = MUST(Crypto::Curves::X448::compute_coordinate(bob_private_key, coordinate));
+    EXPECT_EQ(bob_public_key, generated_bob_public);
+
+    auto shared_alice = MUST(Crypto::Curves::X448::compute_coordinate(alice_private_key, bob_public_key));
+    EXPECT_EQ(shared_alice, shared_secret);
+
+    auto shared_bob = MUST(Crypto::Curves::X448::compute_coordinate(bob_private_key, alice_public_key));
+    EXPECT_EQ(shared_bob, shared_secret);
+
+    EXPECT_EQ(shared_alice, shared_bob);
+}