Initial project import

tools/v/vlib/crypto/cipher/ofb_test.v

@@ -0,0 +1,33 @@
+import crypto.cipher
+import crypto.aes
+import crypto.des
+
+struct StreamCipher {
+	cipher cipher.Stream
+}
+
+fn test_ofb_stream_cipher() ! {
+	key := '123456789012345678901234'.bytes()
+	iv := 'abcdegfh'.bytes()
+
+	block := des.new_cipher(key[..8])
+	c := cipher.new_ofb(block, iv)
+
+	s := StreamCipher{
+		cipher: c
+	}
+}
+
+fn test_ofb_byte_by_byte() {
+	key := []u8{len: 16, init: index}
+	iv := []u8{len: 16, init: index}
+	txt := []u8{len: 32, init: index}
+	mut out := []u8{len: 32}
+
+	mut ofb := cipher.new_ofb(aes.new_cipher(key), iv)
+	for i in 0 .. 32 {
+		ofb.xor_key_stream(mut out[i..i + 1], txt[i..i + 1])
+	}
+	assert out == [u8(10), 149, 9, 182, 69, 107, 246, 66, 249, 202, 158, 83, 202, 94, 228, 85,
+		190, 246, 12, 182, 85, 194, 184, 92, 243, 121, 164, 215, 69, 34, 168, 124]
+}