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package aescts
import (
"encoding/hex"
"github.com/stretchr/testify/assert"
"testing"
)
func TestAesCts_Encrypt_Decrypt(t *testing.T) {
iv := make([]byte, 16)
key, _ := hex.DecodeString("636869636b656e207465726979616b69")
var tests = []struct {
plain string
cipher string
nextIV string
}{
//Test vectors from RFC 3962 Appendix B
{"4920776f756c64206c696b652074686520", "c6353568f2bf8cb4d8a580362da7ff7f97", "c6353568f2bf8cb4d8a580362da7ff7f"},
{"4920776f756c64206c696b65207468652047656e6572616c20476175277320", "fc00783e0efdb2c1d445d4c8eff7ed2297687268d6ecccc0c07b25e25ecfe5", "fc00783e0efdb2c1d445d4c8eff7ed22"},
{"4920776f756c64206c696b65207468652047656e6572616c2047617527732043", "39312523a78662d5be7fcbcc98ebf5a897687268d6ecccc0c07b25e25ecfe584", "39312523a78662d5be7fcbcc98ebf5a8"},
{"4920776f756c64206c696b65207468652047656e6572616c20476175277320436869636b656e2c20706c656173652c", "97687268d6ecccc0c07b25e25ecfe584b3fffd940c16a18c1b5549d2f838029e39312523a78662d5be7fcbcc98ebf5", "b3fffd940c16a18c1b5549d2f838029e"},
{"4920776f756c64206c696b65207468652047656e6572616c20476175277320436869636b656e2c20706c656173652c20", "97687268d6ecccc0c07b25e25ecfe5849dad8bbb96c4cdc03bc103e1a194bbd839312523a78662d5be7fcbcc98ebf5a8", "9dad8bbb96c4cdc03bc103e1a194bbd8"},
{"4920776f756c64206c696b65207468652047656e6572616c20476175277320436869636b656e2c20706c656173652c20616e6420776f6e746f6e20736f75702e", "97687268d6ecccc0c07b25e25ecfe58439312523a78662d5be7fcbcc98ebf5a84807efe836ee89a526730dbc2f7bc8409dad8bbb96c4cdc03bc103e1a194bbd8", "4807efe836ee89a526730dbc2f7bc840"},
}
for i, test := range tests {
m, _ := hex.DecodeString(test.plain)
niv, c, err := Encrypt(key, iv, m)
if err != nil {
t.Errorf("Encryption failed for test %v: %v", i+1, err)
}
assert.Equal(t, test.cipher, hex.EncodeToString(c), "Encrypted result not as expected")
assert.Equal(t, test.nextIV, hex.EncodeToString(niv), "Next state IV not as expected")
}
//t.Log("AES CTS Encryption tests finished")
for i, test := range tests {
b, _ := hex.DecodeString(test.cipher)
p, err := Decrypt(key, iv, b)
if err != nil {
t.Errorf("Decryption failed for test %v: %v", i+1, err)
}
assert.Equal(t, test.plain, hex.EncodeToString(p), "Decrypted result not as expected")
}
//t.Log("AES CTS Decryption tests finished")
}
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