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@ -1,4 +1,4 @@
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// Fingerprint of Chrome 97
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// Fingerprint of Chrome 99
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package client
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@ -46,7 +46,7 @@ func (c *Chrome) composeExtensions(serverName string, keyShare []byte) []byte {
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// extension length is always 403, and server name length is variable
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var ext [17][]byte
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var ext [18][]byte
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ext[0] = addExtRec(makeGREASE(), nil) // First GREASE
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ext[1] = addExtRec([]byte{0x00, 0x00}, generateSNI(serverName)) // server name indication
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ext[2] = addExtRec([]byte{0x00, 0x17}, nil) // extended_master_secret
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@ -62,16 +62,18 @@ func (c *Chrome) composeExtensions(serverName string, keyShare []byte) []byte {
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ext[10] = addExtRec([]byte{0x00, 0x12}, nil) // signed cert timestamp
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ext[11] = addExtRec([]byte{0x00, 0x33}, makeKeyShare(keyShare)) // key share
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ext[12] = addExtRec([]byte{0x00, 0x2d}, []byte{0x01, 0x01}) // psk key exchange modes
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suppVersions, _ := hex.DecodeString("0a9A9A0304030303020301") // 9A9A needs to be a GREASE
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suppVersions, _ := hex.DecodeString("069A9A03040303") // 9A9A needs to be a GREASE
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copy(suppVersions[1:3], makeGREASE())
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ext[13] = addExtRec([]byte{0x00, 0x2b}, suppVersions) // supported versions
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ext[14] = addExtRec([]byte{0x00, 0x1b}, []byte{0x02, 0x00, 0x02}) // compress certificate
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ext[15] = addExtRec(makeGREASE(), []byte{0x00}) // Last GREASE
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// len(ext[1]) + 170 + len(ext[16]) = 403
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// len(ext[16]) = 233 - len(ext[1])
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// 2+2+len(padding) = 233 - len(ext[1])
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// len(padding) = 229 - len(ext[1])
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ext[16] = addExtRec([]byte{0x00, 0x15}, make([]byte, 229-len(ext[1]))) // padding
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applicationSettings, _ := hex.DecodeString("0003026832")
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ext[15] = addExtRec([]byte{0x44, 0x69}, applicationSettings) // application settings
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ext[16] = addExtRec(makeGREASE(), []byte{0x00}) // Last GREASE
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// len(ext[1]) + 175 + len(ext[16]) = 403
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// len(ext[16]) = 228 - len(ext[1])
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// 2+2+len(padding) = 228 - len(ext[1])
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// len(padding) = 224 - len(ext[1])
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ext[17] = addExtRec([]byte{0x00, 0x15}, make([]byte, 224-len(ext[1]))) // padding
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var ret []byte
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for _, e := range ext {
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ret = append(ret, e...)
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