Source file src/crypto/tls/key_schedule_test.go

     1  // Copyright 2018 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package tls
     6  
     7  import (
     8  	"bytes"
     9  	"encoding/hex"
    10  	"hash"
    11  	"strings"
    12  	"testing"
    13  	"unicode"
    14  )
    15  
    16  // This file contains tests derived from draft-ietf-tls-tls13-vectors-07.
    17  
    18  func parseVector(v string) []byte {
    19  	v = strings.Map(func(c rune) rune {
    20  		if unicode.IsSpace(c) {
    21  			return -1
    22  		}
    23  		return c
    24  	}, v)
    25  	parts := strings.Split(v, ":")
    26  	v = parts[len(parts)-1]
    27  	res, err := hex.DecodeString(v)
    28  	if err != nil {
    29  		panic(err)
    30  	}
    31  	return res
    32  }
    33  
    34  func TestDeriveSecret(t *testing.T) {
    35  	chTranscript := cipherSuitesTLS13[0].hash.New()
    36  	chTranscript.Write(parseVector(`
    37  	payload (512 octets):  01 00 01 fc 03 03 1b c3 ce b6 bb e3 9c ff
    38  	93 83 55 b5 a5 0a db 6d b2 1b 7a 6a f6 49 d7 b4 bc 41 9d 78 76
    39  	48 7d 95 00 00 06 13 01 13 03 13 02 01 00 01 cd 00 00 00 0b 00
    40  	09 00 00 06 73 65 72 76 65 72 ff 01 00 01 00 00 0a 00 14 00 12
    41  	00 1d 00 17 00 18 00 19 01 00 01 01 01 02 01 03 01 04 00 33 00
    42  	26 00 24 00 1d 00 20 e4 ff b6 8a c0 5f 8d 96 c9 9d a2 66 98 34
    43  	6c 6b e1 64 82 ba dd da fe 05 1a 66 b4 f1 8d 66 8f 0b 00 2a 00
    44  	00 00 2b 00 03 02 03 04 00 0d 00 20 00 1e 04 03 05 03 06 03 02
    45  	03 08 04 08 05 08 06 04 01 05 01 06 01 02 01 04 02 05 02 06 02
    46  	02 02 00 2d 00 02 01 01 00 1c 00 02 40 01 00 15 00 57 00 00 00
    47  	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    48  	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    49  	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    50  	00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    51  	00 29 00 dd 00 b8 00 b2 2c 03 5d 82 93 59 ee 5f f7 af 4e c9 00
    52  	00 00 00 26 2a 64 94 dc 48 6d 2c 8a 34 cb 33 fa 90 bf 1b 00 70
    53  	ad 3c 49 88 83 c9 36 7c 09 a2 be 78 5a bc 55 cd 22 60 97 a3 a9
    54  	82 11 72 83 f8 2a 03 a1 43 ef d3 ff 5d d3 6d 64 e8 61 be 7f d6
    55  	1d 28 27 db 27 9c ce 14 50 77 d4 54 a3 66 4d 4e 6d a4 d2 9e e0
    56  	37 25 a6 a4 da fc d0 fc 67 d2 ae a7 05 29 51 3e 3d a2 67 7f a5
    57  	90 6c 5b 3f 7d 8f 92 f2 28 bd a4 0d da 72 14 70 f9 fb f2 97 b5
    58  	ae a6 17 64 6f ac 5c 03 27 2e 97 07 27 c6 21 a7 91 41 ef 5f 7d
    59  	e6 50 5e 5b fb c3 88 e9 33 43 69 40 93 93 4a e4 d3 57 fa d6 aa
    60  	cb 00 21 20 3a dd 4f b2 d8 fd f8 22 a0 ca 3c f7 67 8e f5 e8 8d
    61  	ae 99 01 41 c5 92 4d 57 bb 6f a3 1b 9e 5f 9d`))
    62  
    63  	type args struct {
    64  		secret     []byte
    65  		label      string
    66  		transcript hash.Hash
    67  	}
    68  	tests := []struct {
    69  		name string
    70  		args args
    71  		want []byte
    72  	}{
    73  		{
    74  			`derive secret for handshake "tls13 derived"`,
    75  			args{
    76  				parseVector(`PRK (32 octets):  33 ad 0a 1c 60 7e c0 3b 09 e6 cd 98 93 68 0c e2
    77  				10 ad f3 00 aa 1f 26 60 e1 b2 2e 10 f1 70 f9 2a`),
    78  				"derived",
    79  				nil,
    80  			},
    81  			parseVector(`expanded (32 octets):  6f 26 15 a1 08 c7 02 c5 67 8f 54 fc 9d ba
    82  			b6 97 16 c0 76 18 9c 48 25 0c eb ea c3 57 6c 36 11 ba`),
    83  		},
    84  		{
    85  			`derive secret "tls13 c e traffic"`,
    86  			args{
    87  				parseVector(`PRK (32 octets):  9b 21 88 e9 b2 fc 6d 64 d7 1d c3 29 90 0e 20 bb
    88  				41 91 50 00 f6 78 aa 83 9c bb 79 7c b7 d8 33 2c`),
    89  				"c e traffic",
    90  				chTranscript,
    91  			},
    92  			parseVector(`expanded (32 octets):  3f bb e6 a6 0d eb 66 c3 0a 32 79 5a ba 0e
    93  			ff 7e aa 10 10 55 86 e7 be 5c 09 67 8d 63 b6 ca ab 62`),
    94  		},
    95  	}
    96  	for _, tt := range tests {
    97  		t.Run(tt.name, func(t *testing.T) {
    98  			c := cipherSuitesTLS13[0]
    99  			if got := c.deriveSecret(tt.args.secret, tt.args.label, tt.args.transcript); !bytes.Equal(got, tt.want) {
   100  				t.Errorf("cipherSuiteTLS13.deriveSecret() = % x, want % x", got, tt.want)
   101  			}
   102  		})
   103  	}
   104  }
   105  
   106  func TestTrafficKey(t *testing.T) {
   107  	trafficSecret := parseVector(
   108  		`PRK (32 octets):  b6 7b 7d 69 0c c1 6c 4e 75 e5 42 13 cb 2d 37 b4
   109  		e9 c9 12 bc de d9 10 5d 42 be fd 59 d3 91 ad 38`)
   110  	wantKey := parseVector(
   111  		`key expanded (16 octets):  3f ce 51 60 09 c2 17 27 d0 f2 e4 e8 6e
   112  		e4 03 bc`)
   113  	wantIV := parseVector(
   114  		`iv expanded (12 octets):  5d 31 3e b2 67 12 76 ee 13 00 0b 30`)
   115  
   116  	c := cipherSuitesTLS13[0]
   117  	gotKey, gotIV := c.trafficKey(trafficSecret)
   118  	if !bytes.Equal(gotKey, wantKey) {
   119  		t.Errorf("cipherSuiteTLS13.trafficKey() gotKey = % x, want % x", gotKey, wantKey)
   120  	}
   121  	if !bytes.Equal(gotIV, wantIV) {
   122  		t.Errorf("cipherSuiteTLS13.trafficKey() gotIV = % x, want % x", gotIV, wantIV)
   123  	}
   124  }
   125  
   126  func TestExtract(t *testing.T) {
   127  	type args struct {
   128  		newSecret     []byte
   129  		currentSecret []byte
   130  	}
   131  	tests := []struct {
   132  		name string
   133  		args args
   134  		want []byte
   135  	}{
   136  		{
   137  			`extract secret "early"`,
   138  			args{
   139  				nil,
   140  				nil,
   141  			},
   142  			parseVector(`secret (32 octets):  33 ad 0a 1c 60 7e c0 3b 09 e6 cd 98 93 68 0c
   143  			e2 10 ad f3 00 aa 1f 26 60 e1 b2 2e 10 f1 70 f9 2a`),
   144  		},
   145  		{
   146  			`extract secret "master"`,
   147  			args{
   148  				nil,
   149  				parseVector(`salt (32 octets):  43 de 77 e0 c7 77 13 85 9a 94 4d b9 db 25 90 b5
   150  				31 90 a6 5b 3e e2 e4 f1 2d d7 a0 bb 7c e2 54 b4`),
   151  			},
   152  			parseVector(`secret (32 octets):  18 df 06 84 3d 13 a0 8b f2 a4 49 84 4c 5f 8a
   153  			47 80 01 bc 4d 4c 62 79 84 d5 a4 1d a8 d0 40 29 19`),
   154  		},
   155  		{
   156  			`extract secret "handshake"`,
   157  			args{
   158  				parseVector(`IKM (32 octets):  8b d4 05 4f b5 5b 9d 63 fd fb ac f9 f0 4b 9f 0d
   159  				35 e6 d6 3f 53 75 63 ef d4 62 72 90 0f 89 49 2d`),
   160  				parseVector(`salt (32 octets):  6f 26 15 a1 08 c7 02 c5 67 8f 54 fc 9d ba b6 97
   161  				16 c0 76 18 9c 48 25 0c eb ea c3 57 6c 36 11 ba`),
   162  			},
   163  			parseVector(`secret (32 octets):  1d c8 26 e9 36 06 aa 6f dc 0a ad c1 2f 74 1b
   164  			01 04 6a a6 b9 9f 69 1e d2 21 a9 f0 ca 04 3f be ac`),
   165  		},
   166  	}
   167  	for _, tt := range tests {
   168  		t.Run(tt.name, func(t *testing.T) {
   169  			c := cipherSuitesTLS13[0]
   170  			if got := c.extract(tt.args.newSecret, tt.args.currentSecret); !bytes.Equal(got, tt.want) {
   171  				t.Errorf("cipherSuiteTLS13.extract() = % x, want % x", got, tt.want)
   172  			}
   173  		})
   174  	}
   175  }
   176  

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