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package macaroon
import (
"strconv"
"strings"
"unicode"
gc "gopkg.in/check.v1"
)
type packetSuite struct{}
var _ = gc.Suite(&packetSuite{})
func (*packetSuite) TestAppendPacket(c *gc.C) {
var m Macaroon
p, ok := m.appendPacket("field", []byte("some data"))
c.Assert(ok, gc.Equals, true)
c.Assert(string(m.data), gc.Equals, "0014field some data\n")
c.Assert(p, gc.Equals, packet{
start: 0,
totalLen: 20,
headerLen: 10,
})
p, ok = m.appendPacket("otherfield", []byte("more and more data"))
c.Assert(ok, gc.Equals, true)
c.Assert(string(m.data), gc.Equals, "0014field some data\n0022otherfield more and more data\n")
c.Assert(p, gc.Equals, packet{
start: 20,
totalLen: 34,
headerLen: 15,
})
}
func (*packetSuite) TestAppendPacketTooBig(c *gc.C) {
var m Macaroon
data := make([]byte, 65532)
p, ok := m.appendPacket("field", data)
c.Assert(ok, gc.Equals, false)
c.Assert(p, gc.Equals, packet{})
}
func (*packetSuite) TestDataBytes(c *gc.C) {
var m Macaroon
m.appendPacket("first", []byte("first data"))
p, ok := m.appendPacket("field", []byte("some data"))
c.Assert(ok, gc.Equals, true)
c.Assert(string(m.dataBytes(p)), gc.Equals, "some data")
}
func (*packetSuite) TestPacketBytes(c *gc.C) {
var m Macaroon
m.appendPacket("first", []byte("first data"))
p, ok := m.appendPacket("field", []byte("some data"))
c.Assert(ok, gc.Equals, true)
c.Assert(string(m.packetBytes(p)), gc.Equals, "0014field some data\n")
}
func (*packetSuite) TestFieldName(c *gc.C) {
var m Macaroon
m.appendPacket("first", []byte("first data"))
p, ok := m.appendPacket("field", []byte("some data"))
c.Assert(ok, gc.Equals, true)
c.Assert(string(m.fieldName(p)), gc.Equals, "field")
c.Assert(m.fieldName(packet{}), gc.HasLen, 0)
}
var parsePacketTests = []struct {
data string
start int
expect packet
expectErr string
expectData string
expectField string
}{{
expectErr: "packet too short",
}, {
data: "0014field some data\n",
start: 0,
expect: packet{
start: 0,
totalLen: 20,
headerLen: 10,
},
expectData: "some data",
expectField: "field",
}, {
data: "0014field some data\n",
start: 1,
expectErr: "packet size too big",
}, {
data: "0014field some data\n0014field some data\n",
start: 0x14,
expect: packet{
start: 0x14,
totalLen: 20,
headerLen: 10,
},
expectData: "some data",
expectField: "field",
}, {
data: "0014fieldwithoutanyspaceordata\n",
start: 0,
expectErr: "cannot parse field name",
}, {
data: "fedcsomefield " + strings.Repeat("x", 0xfedc-len("0000somefield \n")) + "\n",
start: 0,
expect: packet{
start: 0,
totalLen: 0xfedc,
headerLen: 14,
},
expectData: strings.Repeat("x", 0xfedc-len("0000somefield \n")),
expectField: "somefield",
}, {
data: "zzzzbadpacketsizenomacaroon",
start: 0,
expectErr: "cannot parse size",
}}
func (*packetSuite) TestParsePacket(c *gc.C) {
for i, test := range parsePacketTests {
c.Logf("test %d: %q", i, truncate(test.data))
m := Macaroon{
data: []byte(test.data),
}
p, err := m.parsePacket(test.start)
if test.expectErr != "" {
c.Assert(err, gc.ErrorMatches, test.expectErr)
c.Assert(p, gc.Equals, packet{})
continue
}
c.Assert(err, gc.IsNil)
c.Assert(p, gc.Equals, test.expect)
c.Assert(string(m.dataBytes(p)), gc.Equals, test.expectData)
c.Assert(string(m.fieldName(p)), gc.Equals, test.expectField)
// append the same packet again and check that
// the contents are the same.
p1, ok := m.appendPacket(test.expectField, []byte(test.expectData))
c.Assert(ok, gc.Equals, true)
c.Assert(string(m.packetBytes(p)), gc.Equals, string(m.packetBytes(p1)))
}
}
func truncate(d string) string {
if len(d) > 50 {
return d[0:50] + "..."
}
return d
}
func (*packetSuite) TestAsciiHex(c *gc.C) {
for b := 0; b < 256; b++ {
n, err := strconv.ParseInt(string(b), 16, 8)
value, ok := asciiHex(byte(b))
if err != nil || unicode.IsUpper(rune(b)) {
c.Assert(ok, gc.Equals, false)
c.Assert(value, gc.Equals, 0)
} else {
c.Assert(ok, gc.Equals, true)
c.Assert(value, gc.Equals, int(n))
}
}
}
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