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implement certificate compression using common certificate sets

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fixes #47
This commit is contained in:
Lucas Clemente
2016-05-11 15:57:24 +02:00
parent ea83ca8950
commit d17d597ebe
3 changed files with 89 additions and 3 deletions
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38
crypto/cert_compression_test.go
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@@ -7,6 +7,7 @@ import (
"encoding/binary"
"hash/fnv"
"github.com/lucas-clemente/quic-go-certificates"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
@@ -95,4 +96,41 @@ var _ = Describe("Cert compression", func() {
expected = append(expected, certZlib.Bytes()...)
Expect(compressed).To(Equal(expected))
})
It("uses common certificates", func() {
cert := certsets.CertSet1[42]
setHash := make([]byte, 8)
binary.LittleEndian.PutUint64(setHash, certsets.CertSet1Hash)
chain := [][]byte{cert}
compressed, err := compressChain(chain, setHash, nil)
Expect(err).ToNot(HaveOccurred())
expected := []byte{0x03}
expected = append(expected, setHash...)
expected = append(expected, []byte{42, 0, 0, 0}...)
expected = append(expected, 0x00)
Expect(compressed).To(Equal(expected))
})
It("uses common certificates and compressed combined", func() {
cert1 := []byte{0xde, 0xca, 0xfb, 0xad}
cert2 := certsets.CertSet1[42]
setHash := make([]byte, 8)
binary.LittleEndian.PutUint64(setHash, certsets.CertSet1Hash)
certZlib := &bytes.Buffer{}
z, err := zlib.NewWriterLevelDict(certZlib, flate.BestCompression, append(cert2, certDictZlib...))
Expect(err).ToNot(HaveOccurred())
z.Write([]byte{0x04, 0x00, 0x00, 0x00})
z.Write(cert1)
z.Close()
chain := [][]byte{cert1, cert2}
compressed, err := compressChain(chain, setHash, nil)
Expect(err).ToNot(HaveOccurred())
expected := []byte{0x01, 0x03}
expected = append(expected, setHash...)
expected = append(expected, []byte{42, 0, 0, 0}...)
expected = append(expected, 0x00)
expected = append(expected, []byte{0x08, 0, 0, 0}...)
expected = append(expected, certZlib.Bytes()...)
Expect(compressed).To(Equal(expected))
})
})