1 package main 2 3 import ( 4 "bytes" 5 "encoding/hex" 6 "testing" 7 ) 8 9 // See draft-irtf-cfrg-chacha20-poly1305-10, section 2.1.1. 10 func TestChaChaQuarterRound(t *testing.T) { 11 state := [16]uint32{0x11111111, 0x01020304, 0x9b8d6f43, 0x01234567} 12 chaChaQuarterRound(&state, 0, 1, 2, 3) 13 14 a, b, c, d := state[0], state[1], state[2], state[3] 15 if a != 0xea2a92f4 || b != 0xcb1cf8ce || c != 0x4581472e || d != 0x5881c4bb { 16 t.Errorf("Incorrect results: %x", state) 17 } 18 } 19 20 // See draft-irtf-cfrg-chacha20-poly1305-10, section 2.2.1. 21 func TestChaChaQuarterRoundState(t *testing.T) { 22 state := [16]uint32{ 23 0x879531e0, 0xc5ecf37d, 0x516461b1, 0xc9a62f8a, 24 0x44c20ef3, 0x3390af7f, 0xd9fc690b, 0x2a5f714c, 25 0x53372767, 0xb00a5631, 0x974c541a, 0x359e9963, 26 0x5c971061, 0x3d631689, 0x2098d9d6, 0x91dbd320, 27 } 28 chaChaQuarterRound(&state, 2, 7, 8, 13) 29 30 expected := [16]uint32{ 31 0x879531e0, 0xc5ecf37d, 0xbdb886dc, 0xc9a62f8a, 32 0x44c20ef3, 0x3390af7f, 0xd9fc690b, 0xcfacafd2, 33 0xe46bea80, 0xb00a5631, 0x974c541a, 0x359e9963, 34 0x5c971061, 0xccc07c79, 0x2098d9d6, 0x91dbd320, 35 } 36 for i := range state { 37 if state[i] != expected[i] { 38 t.Errorf("Mismatch at %d: %x vs %x", i, state, expected) 39 } 40 } 41 } 42 43 // See draft-irtf-cfrg-chacha20-poly1305-10, section 2.3.2. 44 func TestChaCha20Block(t *testing.T) { 45 state := [16]uint32{ 46 0x61707865, 0x3320646e, 0x79622d32, 0x6b206574, 47 0x03020100, 0x07060504, 0x0b0a0908, 0x0f0e0d0c, 48 0x13121110, 0x17161514, 0x1b1a1918, 0x1f1e1d1c, 49 0x00000001, 0x09000000, 0x4a000000, 0x00000000, 50 } 51 out := make([]byte, 64) 52 chaCha20Block(&state, out) 53 54 expected := []byte{ 55 0x10, 0xf1, 0xe7, 0xe4, 0xd1, 0x3b, 0x59, 0x15, 56 0x50, 0x0f, 0xdd, 0x1f, 0xa3, 0x20, 0x71, 0xc4, 57 0xc7, 0xd1, 0xf4, 0xc7, 0x33, 0xc0, 0x68, 0x03, 58 0x04, 0x22, 0xaa, 0x9a, 0xc3, 0xd4, 0x6c, 0x4e, 59 0xd2, 0x82, 0x64, 0x46, 0x07, 0x9f, 0xaa, 0x09, 60 0x14, 0xc2, 0xd7, 0x05, 0xd9, 0x8b, 0x02, 0xa2, 61 0xb5, 0x12, 0x9c, 0xd1, 0xde, 0x16, 0x4e, 0xb9, 62 0xcb, 0xd0, 0x83, 0xe8, 0xa2, 0x50, 0x3c, 0x4e, 63 } 64 if !bytes.Equal(out, expected) { 65 t.Errorf("Got %x, wanted %x", out, expected) 66 } 67 } 68 69 // See draft-agl-tls-chacha20poly1305-04, section 7. 70 func TestChaCha20Poly1305(t *testing.T) { 71 key, _ := hex.DecodeString("4290bcb154173531f314af57f3be3b5006da371ece272afa1b5dbdd1100a1007") 72 input, _ := hex.DecodeString("86d09974840bded2a5ca") 73 nonce, _ := hex.DecodeString("cd7cf67be39c794a") 74 ad, _ := hex.DecodeString("87e229d4500845a079c0") 75 output, _ := hex.DecodeString("e3e446f7ede9a19b62a4677dabf4e3d24b876bb284753896e1d6") 76 77 aead, err := newChaCha20Poly1305(key) 78 if err != nil { 79 t.Fatal(err) 80 } 81 82 out, err := aead.Open(nil, nonce, output, ad) 83 if err != nil { 84 t.Errorf("Open failed: %s", err) 85 } else if !bytes.Equal(out, input) { 86 t.Errorf("Open gave %x, wanted %x", out, input) 87 } 88 89 out = aead.Seal(nil, nonce, input, ad) 90 if !bytes.Equal(out, output) { 91 t.Errorf("Open gave %x, wanted %x", out, output) 92 } 93 94 out[0]++ 95 _, err = aead.Open(nil, nonce, out, ad) 96 if err == nil { 97 t.Errorf("Open on malformed data unexpectedly succeeded") 98 } 99 } 100
