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Adam Langley
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Nov 22, 2012
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commit 7bb0624
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,123 @@ | ||
package bbssig | ||
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import ( | ||
"bytes" | ||
"crypto/rand" | ||
"crypto/sha256" | ||
"testing" | ||
) | ||
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func TestMarshal(t *testing.T) { | ||
priv, err := GenerateGroup(rand.Reader) | ||
if err != nil { | ||
t.Fatalf("failed to generate group: %s", err) | ||
} | ||
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groupBytes := priv.Group.Marshal() | ||
_, ok := new(Group).Unmarshal(groupBytes) | ||
if !ok { | ||
t.Error("failed to unmarshal group") | ||
} | ||
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group2, ok := new(Group).Unmarshal(groupBytes) | ||
if !ok { | ||
t.Error("failed to unmarshal group") | ||
} | ||
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if group2Bytes := group2.Marshal(); !bytes.Equal(groupBytes, group2Bytes) { | ||
t.Error("reserialising group produces different result") | ||
} | ||
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_, ok = new(PrivateKey).Unmarshal(group2, priv.Marshal()) | ||
if !ok { | ||
t.Error("failed to unmarshal private key") | ||
} | ||
} | ||
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func TestSign(t *testing.T) { | ||
priv, err := GenerateGroup(rand.Reader) | ||
if err != nil { | ||
t.Fatalf("failed to generate group: %s", err) | ||
} | ||
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group := priv.Group | ||
member, err := priv.NewMember(rand.Reader) | ||
if err != nil { | ||
t.Fatalf("failed to add member to group: %s", err) | ||
} | ||
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msg := []byte("hello world") | ||
h := sha256.New() | ||
h.Write(msg) | ||
digest := h.Sum(nil) | ||
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ok := false | ||
groupBytes := group.Marshal() | ||
group, ok = new(Group).Unmarshal(groupBytes) | ||
if !ok { | ||
t.Fatalf("failed to unmarshal group") | ||
} | ||
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sig, err := member.Sign(rand.Reader, digest, h) | ||
if err != nil { | ||
t.Fatalf("failed to sign message: %s", err) | ||
} | ||
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if !group.Verify(digest, h, sig) { | ||
t.Errorf("signature failed to verify") | ||
} | ||
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digest[1] ^= 0x80 | ||
if group.Verify(digest, h, sig) { | ||
t.Errorf("signature always verifies") | ||
} | ||
digest[1] ^= 0x80 | ||
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tag, ok := priv.Open(sig) | ||
if !ok { | ||
t.Fatalf("failed to open signature") | ||
} | ||
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if !bytes.Equal(tag, member.Tag()) { | ||
t.Errorf("Open returned wrong tag value") | ||
} | ||
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member2, err := priv.NewMember(rand.Reader) | ||
if err != nil { | ||
t.Fatalf("failed to add second member: %s", err) | ||
} | ||
rev := priv.GenerateRevocation(member) | ||
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group.Update(rev) | ||
if group.Verify(digest, h, sig) { | ||
t.Errorf("signature still verifies after revocation") | ||
} | ||
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if member.Update(rev) { | ||
t.Errorf("revoked key successfully updated") | ||
} | ||
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sig2, err := member2.Sign(rand.Reader, digest, h) | ||
if err != nil { | ||
t.Fatalf("failed to sign second message: %s", err) | ||
} | ||
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if group.Verify(digest, h, sig2) { | ||
t.Errorf("signature verified before member key updated") | ||
} | ||
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member2.Group.Update(rev) | ||
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if !member2.Update(rev) { | ||
t.Errorf("unrevoked member failed to update") | ||
} | ||
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sig3, err := member2.Sign(rand.Reader, digest, h) | ||
if err != nil { | ||
t.Fatalf("failed to sign second message: %s", err) | ||
} | ||
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if !group.Verify(digest, h, sig3) { | ||
t.Errorf("updated signature failed to verify") | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,7 @@ | ||
Short-term TODOs: | ||
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Allow for immediate deletion. | ||
Expose server queue length in fetches | ||
Delete messages while UI is open. | ||
? Add delay to server responses. | ||
Compress messages |
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