update

Hunter0x7c7

2022-08-11 b8230139fb40edea387617b6accd8371e37eda58

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package crypto_test 
 
import ( 
    "crypto/rand" 
    "encoding/hex" 
    "testing" 
 
    "github.com/google/go-cmp/cmp" 
 
    "github.com/v2fly/v2ray-core/v5/common" 
    . "github.com/v2fly/v2ray-core/v5/common/crypto" 
) 
 
func mustDecodeHex(s string) []byte { 
    b, err := hex.DecodeString(s) 
    common.Must(err) 
    return b 
} 
 
func TestChaCha20Stream(t *testing.T) { 
    cases := []struct { 
        key    []byte 
        iv     []byte 
        output []byte 
    }{ 
        { 
            key: mustDecodeHex("0000000000000000000000000000000000000000000000000000000000000000"), 
            iv:  mustDecodeHex("0000000000000000"), 
            output: mustDecodeHex("76b8e0ada0f13d90405d6ae55386bd28bdd219b8a08ded1aa836efcc8b770dc7" + 
                "da41597c5157488d7724e03fb8d84a376a43b8f41518a11cc387b669b2ee6586" + 
                "9f07e7be5551387a98ba977c732d080dcb0f29a048e3656912c6533e32ee7aed" + 
                "29b721769ce64e43d57133b074d839d531ed1f28510afb45ace10a1f4b794d6f"), 
        }, 
        { 
            key: mustDecodeHex("5555555555555555555555555555555555555555555555555555555555555555"), 
            iv:  mustDecodeHex("5555555555555555"), 
            output: mustDecodeHex("bea9411aa453c5434a5ae8c92862f564396855a9ea6e22d6d3b50ae1b3663311" + 
                "a4a3606c671d605ce16c3aece8e61ea145c59775017bee2fa6f88afc758069f7" + 
                "e0b8f676e644216f4d2a3422d7fa36c6c4931aca950e9da42788e6d0b6d1cd83" + 
                "8ef652e97b145b14871eae6c6804c7004db5ac2fce4c68c726d004b10fcaba86"), 
        }, 
        { 
            key:    mustDecodeHex("0000000000000000000000000000000000000000000000000000000000000000"), 
            iv:     mustDecodeHex("000000000000000000000000"), 
            output: mustDecodeHex("76b8e0ada0f13d90405d6ae55386bd28bdd219b8a08ded1aa836efcc8b770dc7da41597c5157488d7724e03fb8d84a376a43b8f41518a11cc387b669b2ee6586"), 
        }, 
    } 
    for _, c := range cases { 
        s := NewChaCha20Stream(c.key, c.iv) 
        input := make([]byte, len(c.output)) 
        actualOutput := make([]byte, len(c.output)) 
        s.XORKeyStream(actualOutput, input) 
        if r := cmp.Diff(c.output, actualOutput); r != "" { 
            t.Fatal(r) 
        } 
    } 
} 
 
func TestChaCha20Decoding(t *testing.T) { 
    key := make([]byte, 32) 
    common.Must2(rand.Read(key)) 
    iv := make([]byte, 8) 
    common.Must2(rand.Read(iv)) 
    stream := NewChaCha20Stream(key, iv) 
 
    payload := make([]byte, 1024) 
    common.Must2(rand.Read(payload)) 
 
    x := make([]byte, len(payload)) 
    stream.XORKeyStream(x, payload) 
 
    stream2 := NewChaCha20Stream(key, iv) 
    stream2.XORKeyStream(x, x) 
    if r := cmp.Diff(x, payload); r != "" { 
        t.Fatal(r) 
    } 
}